Odor-adsorbing molded article resin composition, odor-adsorbing molded article, and packaging material

Abstract

The present invention aims to provide an odor-adsorbing molded article resin composition that has excellent suitability for manufacturing, exhibits a high adsorption effect against odors generated by the decomposition of the resin constituting the packaging body during sterilization and disinfection treatments such as UV irradiation, hot pack, boiling, γ-ray irradiation, and EB irradiation, and deodorizes odors that are originally contained in the packaging material and are caused by odors that are difficult to remove once adsorbed and can efficiently adsorb odors, thereby maintaining a high adsorption effect over a long period of time and having excellent resistance to changes in taste and taste of the contents, and an odor-adsorbing molded article made from the said odor-adsorbing molded article resin composition. An odor adsorption molded article resin composition comprising at least a thermoplastic resin A and an odor adsorbent, wherein the odor adsorbent comprises a hydrophobic zeolite having a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the melt flow rate of the thermoplastic resin A is 5 g / min or more and 100 g / min or less, and an odor adsorption molded article made of the odor adsorption molded article resin composition.

Description

Technology Field

[0001] The present invention relates to a resin composition for molded articles having odor adsorption properties with excellent resistance to odor change, which prevents malodorous organic matter originally contained in the packaging material and malodorous components generated from the packaging material during sterilization and disinfection treatment from transferring to the liquid contents within the packaging and causing discoloration of taste or odor in the contents, and to a molded article having odor adsorption properties made from the resin composition.

[0002] In addition, the present invention relates to a sealant film having excellent pinhole resistance and excellent odor and taste change resistance, which prevents leaching organic matter originally contained in the packaging material and malodorous components generated from the sealant film during sterilization and disinfection treatment from transferring to the liquid contents within the packaging and causing discoloration or odor change in the contents, and to a packaging material and packaging body made of this odor-adsorbing sealant film, particularly a liquid contents packaging body for BIB (Bag In Box).

[0003] In addition, the present invention relates to an odor adsorption laminate having excellent odor-tolerant properties that prevents leaching organic matter originally contained in the packaging material and odor components generated from the packaging material during sterilization and disinfection treatment from transferring to the liquid contents within the packaging and causing discoloration or odor change in the contents, and to an odor adsorption film for packaging materials, an odor-adsorbing packaging material, an odor-adsorbing packaging material for BIBs, and an odor-adsorbing liquid contents packaging material for BIBs made from the odor adsorption laminate.

[0004] In addition, the present invention relates to a packaging body having excellent pinhole resistance and excellent odor and taste change resistance, which prevents leaching organic matter originally contained in the packaging material and malodorous components generated from the packaging material during sterilization and disinfection treatment from transferring to the liquid contents within the packaging body and causing discoloration or odor change in the contents; a liquid contents packaging body for a BIB (Bag In Box) including the packaging body; and a packaging material constituting the packaging body.

[0005] In addition, the present invention relates to a packaging body having a double pocket portion that has excellent pinhole resistance and excellent odor and taste change resistance, which prevents leaching organic matter originally contained in the packaging material and malodorous components generated from the packaging material during sterilization and disinfection treatment from transferring to the liquid contents within the packaging body and causing discoloration or odor change in the contents; a liquid contents packaging body for a BIB (Bag In Box) including the packaging body; and a packaging material constituting the packaging body. Background Technology

[0006] Regarding packaging materials, a packaging material containing an odor adsorbent that adsorbs odors has been proposed (Patent Document 1). In this packaging material, an odor adsorbent such as synthetic zeolite or activated carbon is incorporated into the resin material.

[0007] However, these packaging materials do not achieve a sufficient odor adsorption effect because they have the problem of adsorbing not only odors but also moisture from the atmosphere, and also releasing the odors once they have been adsorbed.

[0008] Although packaging materials containing odor adsorbents are known by supporting a chemical adsorbent on an inorganic porous body (Patent Document 2), the main adsorbents only adsorb odor components having specific functional groups, and in situations where a resin material is not selected, the amount of organic matter not having functional groups cannot be suppressed, and thus odor components cannot be sufficiently adsorbed. Prior art literature

[0009] [Patent Document 1] Japanese Patent Publication No. 2538487 [Patent Document 2] Japanese Patent Publication No. 2014-233408 The problem to be solved

[0010] The present invention aims to solve the aforementioned problems and provide an odor-adsorbing molded article resin composition that has excellent manufacturing suitability, exhibits a high adsorption effect against odors generated by the decomposition of the resin constituting the packaging body during sterilization and disinfection treatments such as UV irradiation, hot pack, boiling, γ-ray irradiation, and EB irradiation, thereby deodorizing the odors, and also has excellent odor-adsorbing ability because it is difficult to detach the odors once adsorbed, allowing for efficient odor adsorption, and exhibits a high adsorption effect over a long period of time, and has excellent resistance to changes in taste and taste of the contents, and an odor-adsorbing molded article made from the said odor-adsorbing molded article resin composition (Objective 1).

[0011] The present invention also aims to provide a packaging material having excellent pinhole resistance against friction during transport and excellent leakage resistance of liquid contents, and a liquid contents packaging body for BIB comprising said packaging material (Objective 2).

[0012] In addition, the present invention aims to provide an odor adsorption laminate with excellent odor resistance to liquid contents, and an odor adsorption film for packaging materials, an odor-adsorbing packaging material, an odor-adsorbing packaging material for BIBs, and an odor-adsorbing liquid contents packaging material for BIBs, which are made of the odor adsorption laminate (Objective 3).

[0013] The present invention also aims to provide a packaging body having excellent pinhole resistance against friction during transport and excellent leakage resistance of liquid contents, a packaging body for liquid contents for BIB including the packaging body, and a packaging material constituting the packaging body (Objective 4).

[0014] In addition, the present invention has the objective of providing a packaging body having a double pocket portion that has excellent pinhole resistance against friction during transport and excellent leakage resistance of liquid contents, a packaging body for liquid contents for BIB including the packaging body, and a packaging material constituting the packaging body (Objective 5). means of solving the problem

[0015] Regarding Assignment 1

[0016] The inventors have discovered, through various investigations, that an odor-adsorbing molded article resin composition formed from a resin composition comprising at least a specific thermoplastic resin A and a specific odor adsorbent achieves the above-mentioned purpose.

[0017] That is, the present invention is characterized by the following points.

[0018] 1. An odor adsorption molded article resin composition comprising at least a thermoplastic resin A and an odor adsorbent, wherein the odor adsorbent comprises a hydrophobic zeolite having a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the melt flow rate of the thermoplastic resin A is 5 g / min or more and 100 g / min or less.

[0019] 2. The odor adsorption molded article resin composition described in 1, wherein the odor adsorbent further comprises an inorganic porous body supporting a chemical adsorbent.

[0020] 3. An odor adsorbent molded article resin composition as described in 1 or 2, wherein the odor adsorbent is melt-kneaded with thermoplastic resin B in a ratio of 0.5 / 99.5 or higher to 40 / 60 or lower, and the melt flow rate of thermoplastic resin B is 5 g / min or higher to 100 g / min or lower.

[0021] 4. An odor-adsorbing molded article resin composition as described in any one of 1 to 3 above, wherein the thermoplastic resin A comprises a polyolefin-based resin.

[0022] 5. An odor adsorption molded article resin composition according to any one of 1 to 4, wherein the content of the odor adsorbent in the odor adsorption molded article is 0.3 mass% or more and 15 mass% or less.

[0023] 6. An odor-adsorbing molded article resin composition according to any one of 1 to 5, wherein the content of the hydrophobic zeolite in the odor-adsorbing molded article is 0.3 mass% or more and 15 mass% or less.

[0024] 7. An odor-adsorbing molded article resin composition as described in any one of 2 to 6, wherein the chemical adsorbent of the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids.

[0025] 8. An odor-adsorbing molded article resin composition as described in any one of 1 to 7, wherein the chemical adsorbent of the chemical adsorbent-supported inorganic porous body has an amino group.

[0026] 9. An odor adsorption molded article resin composition according to any one of 2 to 8, wherein the content of the chemical adsorbent in the chemical adsorbent-supported inorganic porous body within the odor adsorption molded article is 0.1 mass% or more and 10 mass% or less.

[0027] 10. An odor-adsorbing molded article made of an odor-adsorbing molded article resin composition as described in any one of 1 to 9 above.

[0028] 11. A molded product with a contents extraction port comprising the odor-adsorbing molded product described in 10 above.

[0029] 12. A content extraction port molded article for a BIB packaging bag comprising the content extraction port molded article described in 11 above.

[0030] 13. A BIB packaging pouch having a molded product with a contents extraction port for a BIB packaging pouch as described in 12 above. Effects of the invention

[0031] Since the odor adsorbent molded article resin composition of the present invention contains a thermoplastic resin A with a specific melt flow rate and a hydrophobic zeolite with a specific SiO2 / Al2O3 molar ratio as an odor adsorbent, the odor adsorbent molded article produced from the odor adsorbent molded article resin composition has the effect of reducing odorous organic matter or odors originally contained in packaging materials and efficiently adsorbing odors generated by the decomposition of the resin constituting the laminate during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot packs, and boiling over a long period of time.

[0032] Due to these effects, when an odor-adsorbing molded article made of the odor-adsorbing molded article resin composition of the present invention is used in a packaging body, the amount of organic matter transferred to the filled contents can be reduced, thereby suppressing changes in taste.

[0033] Accordingly, an odor-adsorbing molded article made of the odor-adsorbing molded article resin composition of the present invention is suitable as a component of packaging for liquid food, pharmaceuticals, or medical products that undergo sterilization or disinfection treatment.

[0034] Regarding Assignment 2

[0035] The inventors have discovered that a sealant film comprising at least an outer layer film and an inner layer film, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film comprises a sealant layer, wherein the sealant layer of the inner layer film comprises an odor adsorption layer, and the odor adsorption layer comprises low-leaching polyethylene and a specific hydrophobic zeolite as an odor adsorbent, achieves the above-mentioned objective.

[0036] The present invention is characterized by the following points.

[0037] 1. An odor adsorbent sealant film comprising at least an outer layer film and an inner layer film, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film comprises a sealant layer containing low-leaching polyethylene, and the sealant layer of the inner layer film comprises an odor adsorbent layer, wherein the odor adsorbent layer comprises low-leaching polyethylene and an odor adsorbent, and the odor adsorbent comprises a hydrophobic zeolite, wherein the hydrophobic zeolite has a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the content of the hydrophobic zeolite in the sealant layer is 0.1 mass% or more and 13 mass% or less.

[0038] 2. The odor-adsorbing sealant film described in 1, wherein the sealant layer of the outer layer film further comprises the odor-adsorbing layer.

[0039] 3. The odor adsorption sealant film described in 1, wherein the odor adsorbent further comprises an inorganic porous body supported by a chemical adsorbent, and the content of the inorganic porous body supported by the chemical adsorbent within the sealant layer is 0.1 mass% or more and 10 mass% or less.

[0040] 4. An odor-adsorbing sealant film described in any one of 1 to 3, wherein the density of the low-leaching polyethylene is 0.90 g / cm³ or higher and 0.94 g / cm³ or lower.

[0041] 5. An odor-adsorbing sealant film described in any one of 1 to 4, wherein the low-release polyethylene is LLDPE.

[0042] 6. An odor-adsorbing sealant film described in any one of 1 to 5, wherein the low-leaching polyethylene is one or more types selected from the group consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE.

[0043] 7. The above low-release polyethylene is an odor adsorption sealant film described in any one of 1 to 6, wherein the number of pinholes generated after 5,000 cycles of Gelboplex at 23°C of a 50 μm thick film made solely of the above low-release polyethylene is 0 or 1 to 160.

[0044] 8. The above low-leaching polyethylene is an odor-adsorbing sealant film described in any one of 1 to 7, wherein the concentration of leaching TOC contained in the film made solely of the above low-leaching polyethylene is 1.5 ppm or more and 250 ppm or less.

[0045] 9. The above hydrophobic zeolite is an odor-adsorbing sealant film described in any one of 1 to 8, which is pre-melted and kneaded with a thermoplastic resin in a ratio of hydrophobic zeolite / thermoplastic resin mass ratio of 0.5 / 99.5 to 40 / 60.

[0046] 10. The chemical adsorbent-supported inorganic porous body is an odor-adsorbing sealant film described in any one of 2 to 9, which is pre-melted and kneaded with a thermoplastic resin in a ratio of chemical adsorbent-supported inorganic porous body / thermoplastic resin of 0.5 / 99.5 to 40 / 60.

[0047] 11. An odor-adsorbing sealant film described in 9 or 10, wherein the melt flow rate of the thermoplastic resin is 0.2 to 10.0 g / 10 min.

[0048] 12. An odor-adsorbing sealant film described in any one of 2 to 11, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids.

[0049] 13. An odor-adsorbing sealant film described in any one of 2 to 12, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has an amino group.

[0050] 14. An odor adsorption sealant film described in any one of 1 to 13, wherein the odor adsorption layer comprises an odor non-adsorption layer on one or both sides, and the odor non-adsorption layer comprises low-leaching polyethylene and is a layer that does not include the odor adsorbent.

[0051] 15. An odor-adsorbing sealant film according to any one of 1 to 14, wherein the outer layer film further comprises a substrate layer.

[0052] 16. An odor-adsorbing packaging material comprising an odor-adsorbing sealant film as described in any one of 1 to 15 above.

[0053] 17. A liquid contents packaging bag for a BIB made of the odor-absorbing packaging material described in 16 above.

[0054] <Effects of the Invention>

[0055] The odor-adsorbing sealant film of the present invention has an odor-adsorbing layer of a specific composition and also contains a specific low-leaching polyethylene, so that leaching organic matter or odors originally contained in the packaging material are reduced, and it has the effect of efficiently adsorbing odors over a long period of time caused by the decomposition of the resin constituting the sealant film during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot packs, and boiling.

[0056] Due to these effects, when a liquid contents packaging is manufactured using the odor-adsorbing sealant film of the present invention, the amount of organic matter leached into the filled liquid contents can be reduced, thereby suppressing changes in taste.

[0057] Therefore, the odor-adsorbing sealant film of the present invention is suitable as a packaging bag for liquid food, pharmaceuticals, or medical products that are subjected to sterilization or disinfection treatment.

[0058] Furthermore, since the odor-adsorbing sealant film of the present invention comprises an outer layer film and an inner layer film that are only partially bonded to each other, the occurrence of pinholes caused by friction during transportation, etc., is suppressed, thereby preventing liquid leakage, etc.

[0059] Regarding Assignment 3

[0060] The inventors have discovered that an odor adsorption laminate comprising at least a substrate layer, an adhesive layer, and a sealant layer, wherein the adhesive layer and / or sealant layer contain an odor adsorbent, and the odor adsorbent comprises a hydrophobic zeolite having a SiO2 / Al2O3 molar ratio of 30 / 1 or more and 8000 / 1 or less, achieves the above-mentioned objective.

[0061] The present invention is characterized by the following points.

[0062] 1. An odor adsorption laminate comprising at least a substrate layer, an adhesive layer, and a sealant layer, wherein the adhesive layer and / or the sealant layer contain an odor adsorbent, and

[0063] An odor adsorption laminate comprising a hydrophobic zeolite having a SiO2 / Al2O3 molar ratio of 30 / 1 or more and 8000 / 1 or less, wherein, when the adhesive layer contains the odor adsorbent, the content of the odor adsorbent in the adhesive layer is 0.3 mass% or more and 50 mass% or less, and when the sealant layer contains the odor adsorbent, the content of the odor adsorbent in the sealant layer is 0.3 mass% or more and 15 mass% or less.

[0064] 2. The odor adsorption laminate described in 1, wherein the adhesive layer is a dry laminate adhesive layer or a non-solvent laminate adhesive layer.

[0065] 3. An odor adsorption laminate described in 1, wherein the adhesive layer is an extrusion coating adhesive layer or a sand laminate adhesive layer, and the content of the odor adsorbent within the adhesive layer is 0.3 mass% or more and 15 mass% or less.

[0066] 4. An odor adsorption laminate described in any one of 1 to 3, wherein the odor adsorbent further comprises a chemical adsorbent-supported inorganic porous body.

[0067] 5. An odor adsorption laminate described in any one of 1 to 4, wherein the odor adsorbent is pre-melted and blended with thermoplastic resin A in a ratio of odor adsorbent / thermoplastic resin mass ratio of 0.5 / 99.5 or higher and 40 / 60 or lower.

[0068] 6. An odor adsorption laminate described in any one of 1 to 5, wherein the adhesive layer further contains one or more types selected from the group consisting of polyurethane resin, polyester resin, polyamide resin, and polyolefin resin.

[0069] 7. An odor adsorption laminate described in any one of 1 to 6, wherein the sealant layer further contains a thermoplastic resin C having a melt flow rate of 0.2 g / 10 min or more and 10.0 g / 10 min or less.

[0070] 8. The adhesive layer comprises an odor-adsorbing adhesive layer containing an odor adsorbent and an odor-non-adsorbing adhesive layer not containing an odor adsorbent, wherein the odor-non-adsorbing adhesive layer is in contact with one or both sides of the odor-adsorbing adhesive layer and is an odor-adsorbing laminate described in any one of 1 to 7.

[0071] 9. The sealant layer comprises an odor-adsorbing sealant layer containing an odor adsorbent and an odor-non-adsorbing sealant layer not containing an odor adsorbent, and the odor-non-adsorbing sealant layer is in contact with one or both sides of the odor-adsorbing sealant layer, and is an odor-adsorbing laminate described in any one of 1 to 8.

[0072] 10. An odor adsorption laminate described in any one of 4 to 9, wherein the content of the hydrophobic zeolite in the adhesive layer is 0.3 mass% or more and 13 mass% or less, and the content of the chemical adsorbent-supported inorganic porous body in the adhesive layer is 0.3 mass% or more and 10 mass% or less.

[0073] 11. An odor adsorption laminate described in any one of 4 to 10, wherein the content of the hydrophobic zeolite in the sealant layer is 0.1 mass% or more and 13 mass% or less, and the content of the chemical adsorbent-supported inorganic porous body in the sealant layer is 0.1 mass% or more and 10 mass% or less.

[0074] 12. An odor adsorption laminate described in any one of 4 to 11, wherein the chemical adsorbent of the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids.

[0075] 13. The odor adsorption laminate described in 12, wherein the chemical adsorbent has amino groups.

[0076] 14. An odor-adsorbing film for packaging materials comprising an odor-adsorbing laminate described in any one of 1 to 13 above.

[0077] 15. An odor-adsorbing packaging material comprising the odor-adsorbing film for packaging materials described in 14 above.

[0078] 16. An odor-adsorbing packaging material comprising at least an outer layer film and an inner layer film, wherein the outer layer film and / or the inner layer film comprises an odor-adsorbing film for packaging material as described in 14, and the outer layer film and the inner layer film are only partially bonded to each other.

[0079] 17. An odor-adsorbing packaging material for BIBs made of the odor-adsorbing packaging material described in 16 above.

[0080] 18. An odor-adsorbing liquid contents packaging material for BIBs, made of the odor-adsorbing packaging material described in 16 above.

[0081] <Effects of the Invention>

[0082] The odor adsorption laminate of the present invention has an odor adsorption layer of a specific composition, so odors are reduced, and it has the effect of efficiently adsorbing odors over a long period of time caused by the decomposition of the resin constituting the laminate during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot packs, and boiling.

[0083] Due to these effects, when a packaging is manufactured using the odor-adsorbing laminate of the present invention, the amount of organic matter transferred into the filled contents can be reduced, thereby suppressing changes in taste.

[0084] Accordingly, the odor-adsorbing laminate of the present invention is suitable as a packaging bag for food, pharmaceuticals, or medical products subjected to sterilization or disinfection treatment. It is particularly suitable when the contents are liquid.

[0085] Regarding Assignment 4

[0086] The inventors have discovered that a packaging material comprising at least an outer layer film and an inner layer film, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film comprises a sealant layer containing low-leaching polyethylene, and the sealant layer of the inner layer film comprises an odor adsorption layer, and the odor adsorption layer comprises low-leaching polyethylene and a specific hydrophobic zeolite as an odor adsorbent, achieves the above-mentioned objective.

[0087] The present invention is characterized by the following points.

[0088] 1. A packaging body having a double pocket portion comprising at least an outer layer film and an inner layer film, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film comprises a sealant layer containing low-leaching polyethylene, and the sealant layer of the inner layer film comprises an odor adsorption layer, wherein the odor adsorption layer comprises low-leaching polyethylene and an odor adsorbent, and the odor adsorbent comprises a hydrophobic zeolite, wherein the hydrophobic zeolite has a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the content of the hydrophobic zeolite in the sealant layer of the inner layer film is 0.1 mass% or more and 13 mass% or less.

[0089] 2. The packaging described in 1, wherein the above odor adsorbent further comprises an inorganic porous body supporting a chemical adsorbent, and the content of the inorganic porous body supporting the chemical adsorbent within the sealant layer of the inner layer film is 0.1 mass% or more and 10 mass% or less.

[0090] 3. The packaging body described in 1 or 2, wherein the density of the low-leaching polyethylene is 0.90 g / cm³ or more and 0.94 g / cm³ or less.

[0091] 4. A packaging body described in any one of 1 to 3, wherein the low-release polyethylene is LLDPE.

[0092] 5. A packaging body described in any one of 1 to 4, wherein the low-leaching polyethylene is one or more types selected from the group consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE.

[0093] 6. The above-mentioned low-release polyethylene is a packaging body described in any one of 1 to 5, wherein the number of pinholes occurring after 5,000 cycles of Gelboplex at 23°C of a 50 μm thick film made solely of the above-mentioned low-release polyethylene is 0 or 1 to 160.

[0094] 7. The above low-leaching polyethylene is a packaging body described in any one of 1 to 6, wherein the concentration of leaching TOC contained in a film made solely of the above low-leaching polyethylene is 1.5 ppm or more and 250 ppm or less.

[0095] 8. The above hydrophobic zeolite is a packaging body described in any one of 1 to 7, which is pre-melted and kneaded with a thermoplastic resin in a ratio of hydrophobic zeolite / thermoplastic resin mass ratio of 0.5 / 99.5 to 40 / 60.

[0096] 9. The above chemical adsorbent-supported inorganic porous body is a packaging body described in any one of 2 to 8, which is previously melt-kneaded with a thermoplastic resin in a ratio of 0.5 / 99.5 to 40 / 60 of the chemical adsorbent-supported inorganic porous body / thermoplastic resin.

[0097] 10. A packaging body described in 8 or 9, wherein the melt flow rate of the thermoplastic resin is 0.2 to 10.0 g / 10 min.

[0098] 11. A packaging body described in any one of 2 to 10, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids.

[0099] 12. A packaging body described in any one of 2 to 11, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has an amino group.

[0100] 13. The inner layer film comprises an odor non-adsorbent layer on one or both sides of the odor adsorbent layer, wherein the odor non-adsorbent layer comprises low-leaching polyethylene and is a layer not comprising the odor adsorbent, as described in any one of 1 to 12.

[0101] 14. A packaging body described in any one of 1 to 13, wherein the outer layer film further comprises a substrate layer.

[0102] 15. A liquid contents packaging for a BIB comprising the packaging described in any one of 1 to 14 above.

[0103] 16. A packaging material constituting the packaging body described in any one of 1 to 14 above.

[0104] <Effects of the Invention>

[0105] The packaging material of the present invention has an odor adsorption layer of a specific composition and also contains a specific low-leaching polyethylene, so the leaching organic matter or odor originally contained in the packaging material is reduced, and has the effect of efficiently adsorbing odors over a long period of time caused by the decomposition of the resin constituting the laminate during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot pack, and boiling.

[0106] Due to these effects, when a liquid contents package is manufactured using the packaging of the present invention, the amount of organic matter leached into the filled liquid contents can be reduced, thereby suppressing changes in taste.

[0107] Accordingly, the packaging of the present invention is suitable as a packaging bag for liquid food, pharmaceuticals, or medical products that are subjected to sterilization or disinfection treatment.

[0108] Furthermore, since the double pocket portion of the packaging of the present invention includes an outer layer film and an inner layer film that are only partially bonded to each other, the occurrence of pinholes caused by friction during transportation, etc., is suppressed, thereby preventing liquid leakage, etc.

[0109] Regarding Assignment 5

[0110] The inventors have discovered, through various examinations, that a packaging body comprising a double pocket portion including at least an outer layer film and an inner layer film, and a contents extraction port including a resin molded article, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film includes a sealant layer having an odor adsorption layer, wherein the odor adsorption layer contains low-leaching polyethylene and a specific hydrophobic zeolite as an odor adsorbent, and the contents extraction port contains a polyolefin-based resin and the hydrophobic zeolite, achieves the above-mentioned purpose.

[0111] The present invention is characterized by the following points.

[0112] 1. A packaging body comprising a double pocket portion including at least an outer layer film and an inner layer film, and a contents extraction port including a resin molded article, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film includes a sealant layer, wherein the sealant layer includes an odor adsorption layer, wherein the odor adsorption layer contains low-leaching polyethylene and an odor adsorbent, wherein the contents extraction port contains a polyolefin-based resin and the odor adsorbent, and wherein the odor adsorbent includes a hydrophobic zeolite, wherein the hydrophobic zeolite has a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the content of the hydrophobic zeolite in the sealant layer is 0.1 mass% or more and 13 mass% or less.

[0113] 2. The packaging described in 1, wherein the above odor adsorbent further comprises a chemical adsorbent-supported inorganic porous body, and the content of the chemical adsorbent-supported inorganic porous body within the sealant layer is 0.1 mass% or more and 10 mass% or less.

[0114] 3. The packaging body described in 1 or 2, wherein the content of the hydrophobic zeolite in the above-mentioned contents extraction port is 0.1 mass% or more and 13 mass% or less.

[0115] 4. A packaging body described in any one of 1 to 3, wherein the above odor adsorbent further comprises a chemical adsorbent-supported inorganic porous body, and the content of the chemical adsorbent-supported inorganic porous body within the contents extraction port is 0.1 mass% or more and 10 mass% or less.

[0116] 5. A packaging body described in any one of 1 to 4, wherein the density of the low-leaching polyethylene is 0.90 g / cm³ or more and 0.94 g / cm³ or less.

[0117] 6. A packaging body described in any one of 1 to 5, wherein the low-release polyethylene is LLDPE.

[0118] 7. A packaging body described in any one of 1 to 6, wherein the low-leaching polyethylene is one or more types selected from the group consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE.

[0119] 8. The above-mentioned low-release polyethylene is a packaging body described in any one of 1 to 7, wherein the number of pinholes occurring after 5,000 cycles of Gelboplex at 23°C of a 50 μm thick film made solely of the above-mentioned low-release polyethylene is 0 or 1 to 160.

[0120] 9. The above low-leaching polyethylene is a packaging body described in any one of 1 to 8, wherein the concentration of leaching TOC contained in a film made solely of the above low-leaching polyethylene is 1.5 ppm or more and 250 ppm or less.

[0121] 10. The above hydrophobic zeolite is a packaging body described in any one of 1 to 9, which is pre-melted and kneaded with a thermoplastic resin in a ratio of hydrophobic zeolite / thermoplastic resin mass ratio of 0.5 / 99.5 to 40 / 60.

[0122] 11. The above chemical adsorbent-supported inorganic porous body is a packaging body described in any one of 2 to 10, which is previously melt-kneaded with a thermoplastic resin in a ratio of 0.5 / 99.5 to 40 / 60 of the chemical adsorbent-supported inorganic porous body / thermoplastic resin.

[0123] 12. A packaging body described in any one of 1 to 11, wherein the melt flow rate of the thermoplastic resin is 0.2 to 10.0 g / 10 min.

[0124] 13. A packaging body described in any one of 2 to 12, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids.

[0125] 14. A packaging body described in any one of 2 to 13 above, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has an amino group.

[0126] 15. The outer layer film and / or the inner layer film comprises an odor non-adsorbent layer on one or both sides of the odor adsorbent layer, wherein the odor non-adsorbent layer comprises low-leaching polyethylene and is a layer not comprising the odor adsorbent, as described in any one of 1 to 14.

[0127] 16. A packaging body described in any one of 1 to 15, wherein the outer layer film further comprises a substrate layer.

[0128] 17. A liquid contents packaging for a BIB comprising the packaging described in any one of 1 to 16 above.

[0129] 18. A packaging material constituting the packaging body described in any one of 1 to 17 above.

[0130] <Effects of the Invention>

[0131] The packaging material of the present invention has an odor adsorption layer of a specific composition and also contains a specific low-leaching polyethylene, so the leaching organic matter or odor originally contained in the packaging material is reduced, and has the effect of efficiently adsorbing odors over a long period of time caused by the decomposition of the resin constituting the laminate during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot pack, and boiling.

[0132] Due to these effects, when a liquid contents package is manufactured using the packaging of the present invention, the amount of organic matter leached into the filled liquid contents can be reduced, thereby suppressing changes in taste.

[0133] Accordingly, the packaging of the present invention is suitable as a packaging bag for liquid food, pharmaceuticals, or medical products that are subjected to sterilization or disinfection treatment.

[0134] Furthermore, since the double pocket portion of the packaging of the present invention includes an outer layer film and an inner layer film that are only partially bonded to each other, the occurrence of pinholes due to friction during transportation, etc., can be suppressed and liquid leakage, etc., can be suppressed. Brief explanation of the drawing

[0135] Regarding Task 1 (Figs. 1–3) FIG. 1 is an aerial view illustrating an example of a packaging body using an odor-adsorbing molded article of the present invention. FIG. 2 is a cross-sectional view illustrating an example of a packaging body using the odor-adsorbing molded article of the present invention. Figure 3 is a diagram illustrating the adsorption mechanism of odorous substances on an inorganic porous body supported by a chemical adsorbent. Regarding Task 2 (Figs. 4–12) FIG. 4 is a schematic bird's-eye view illustrating an example of an odor-adsorbing sealant film of the present invention. Figure 5 is an example of a schematic cross-sectional view along cross-sectional line A of the odor-adsorbing sealant film of Figure 4. FIG. 6 is a cross-sectional view illustrating an example of the layer configuration of an outer layer film or an inner layer film. FIG. 7 is a cross-sectional view illustrating an example of a different embodiment of the layer composition of an outer layer film or an inner layer film. FIG. 8 is a cross-sectional view illustrating an example of another embodiment of the layer composition of an outer layer film or an inner layer film. FIG. 9 is a cross-sectional view illustrating an example of another embodiment of the layer composition of an outer layer film or an inner layer film. FIG. 10 is a cross-sectional view illustrating an example of another aspect of the layer composition of the outer layer film. Figure 11 is a diagram illustrating the adsorption mechanism of odorous substances on an inorganic porous body supported by a chemical adsorbent. FIG. 12 is a schematic bird's-eye view illustrating an example of a liquid contents packaging bag for a BIB. Regarding Task 3 (Figs. 13–15) FIG. 13 is a schematic cross-sectional view illustrating an example of the layer configuration of the odor adsorption laminate of the present invention. FIG. 14 is a schematic cross-sectional view illustrating an example of another embodiment regarding the layer configuration of the odor adsorption laminate of the present invention. FIG. 15 is a schematic cross-sectional view illustrating an example of another embodiment regarding the layer configuration of the odor adsorption laminate of the present invention. Regarding tasks 4 and 5 (Figs. 16–24) FIG. 16 is a schematic bird's-eye view illustrating an example of a packaging body of the present invention. FIG. 17 is an example of a schematic cross-sectional view along cross-sectional line A of the packaging body of FIG. 16. FIG. 18 is a schematic bird's-eye view illustrating an example of an inner layer film. FIG. 19 is an example of a schematic cross-sectional view along the cross-sectional line B of the inner layer film of FIG. 18. FIG. 20 is a cross-sectional view illustrating an example of the layer composition of an inner layer film. FIG. 21 is a cross-sectional view illustrating an example of another aspect of the layer composition of an inner layer film. FIG. 22 is a cross-sectional view illustrating an example of another embodiment of the layer composition of the inner layer film. FIG. 23 is a cross-sectional view illustrating an example of another embodiment of the layer composition of the inner layer film. FIG. 24 is a cross-sectional view illustrating an example of another aspect of the layer composition of the inner layer film. Specific details for implementing the invention

[0136] The present invention will be described in more detail below. Although the description is provided with specific examples, the present invention is not limited thereto.

[0137] Regarding Assignment 1

[0138] <Composition of Odor-Adsorbing Molded Product Resin Composition and Uses of Odor-Adsorbing Molded Products>

[0139] The odor adsorption molded article resin composition of the present invention comprises at least a thermoplastic resin A and an odor adsorbent, wherein the odor adsorbent comprises a hydrophobic zeolite having a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the melt flow rate of the thermoplastic resin A is 5 g / min or more and 100 g / min or less.

[0140] The odor-adsorbing molded article of the present invention can be used as a molded article for extracting contents of a packaging bag, for example, as shown in FIG. 1 and 2.

[0141] In addition, the odor-adsorbing molded article may contain various plastic compounds or additives for the purpose of improving or modifying processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, etc.

[0142] The odor-adsorbing molded article resin composition is obtained by mixing, kneading, and preparing the various raw materials described above in a known manner, and the odor-adsorbing molded article can be obtained by molding the odor-adsorbing molded article resin composition in a known manner.

[0143] As a method for mixing the odor adsorbent and thermoplastic resin A, known or conventional mixing methods may be applied.

[0144] It is possible to directly mix and knead the odor adsorbent with thermoplastic resin A, or to produce a masterbatch by mixing the odor adsorbent with thermoplastic resin B at a high concentration and then melt-kneading it, and then mixing and melt-kneading this with thermoplastic resin A in proportions according to the target content, using the so-called masterbatch method.

[0145] It is preferable that the content of hydrophobic zeolite in the odor-adsorbing molded article resin composition and the odor-adsorbing molded article is 0.3 mass% or more and 15 mass% or less.

[0146] It is preferable that the content of the chemical adsorbent-supported inorganic porous body in the odor-adsorbing molded article resin composition and the odor-adsorbing molded article be 0.1 mass% or more and 10 mass% or less.

[0147] If the value is less than the above range, it is difficult to achieve a sufficient odor adsorption effect, and if the value is more than the above range, the moldability of the odor adsorption molded product is likely to deteriorate.

[0148] The content of hydrophobic zeolite in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0149] The content of the chemical adsorbent-supported inorganic porous body in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0150] In the case of the master batch method, even in combinations of hydrophobic zeolites or chemical adsorbent-supported inorganic porous bodies and polyolefin resins that are prone to aggregation, the hydrophobic zeolites or chemical adsorbent-supported inorganic porous bodies can be homogeneously dispersed within the polyolefin resin.

[0151] As the thermoplastic resin used in the masterbatch, the above-mentioned polyolefin resin is preferred, but is not limited thereto and can be used within a range that does not cause adverse effects.

[0152] <Thermoplastic Resin A>

[0153] The melt flow rate (MFR) of thermoplastic resin A contained in the odor-adsorbing molded article resin composition of the present invention is preferably 5 g / min or more and 100 g / min or less, and more preferably 10 g / min or more and 70 g / min or less.

[0154] If the MFR is less than 5 g / min, the melt viscosity of the odor-adsorbing molded article resin composition becomes excessively high, resulting in insufficient fluidity during molding and making it easy for molding defects such as incomplete filling to occur. If the MFR is greater than 100 g / min, the melt viscosity of the odor-adsorbing molded article resin composition becomes excessively low, causing turbulence in the molten odor-adsorbing molded article resin composition during molding, which can lead to air being drawn in to create voids or cause sinking on the surface of the molded article.

[0155] In addition, in this specification, MFR refers to a value measured by a method in accordance with JIS K7210.

[0156] Specific thermoplastic resin A may include polyolefin resins, polystyrene resins, acrylonitrile-styrene copolymers (AS resins), acrylonitrile-butadiene-styrene copolymers (ABS resins), poly(meth)acrylic resins, polyester resins, polyamide resins, polyurethane resins, acetal resins, cellulose resins, etc., but is not limited to these.

[0157] Among the resins mentioned above, it is preferable to include a polyolefin resin or a polyester resin with low gas permeability.

[0158] Specific examples of polyolefin resins include polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), various ethylene copolymers such as ethylene-vinyl alcohol copolymer resins, polypropylene resins, cyclic polyolefin resins, methylpentene polymers, acid-modified polyolefin resins, etc., but are not limited to these.

[0159] Examples of polyester resins include polycarbonate resins, polyethylene terephthalate, and polyethylene naphthalate, but are not limited to these.

[0160] <Thermoplastic Resin B>

[0161] For thermoplastic resin B, it is desirable to select a thermoplastic resin suitable for dispersing the odor adsorbent in the masterbatch preparation.

[0162] The melt flow rate (MFR) of thermoplastic resin B is preferably 5 g / min or more and 100 g / min or less, and more preferably 10 g / min or more and 70 g / min or less.

[0163] If the MFR is less than 5 g / min, the melt viscosity of the master batch becomes excessively high, and the dispersibility of the odor adsorbent is prone to deterioration. If the MFR is greater than 100 g / min, the melt viscosity of the master batch becomes excessively low, making it difficult to apply shear force and the dispersibility of the odor adsorbent is prone to deterioration. Furthermore, if the MFR is outside the above range, it becomes difficult to adjust the melt viscosity of the odor adsorbent molded article resin composition to an appropriate range.

[0164] As for the thermoplastic resin B used in the master batch, it is preferable to use the same resin as thermoplastic resin A contained in the odor-adsorbing molded article resin composition, and a polyolefin-based resin is more preferable, but is not limited thereto and can be used within a range that does not cause adverse effects.

[0165] Specific thermoplastic resin B includes, but is not limited to, polyolefin resins, polystyrene resins, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), poly(meth)acrylic resins, polyester resins, polyamide resins, polyurethane resins, acetal resins, and cellulose resins.

[0166] Among the resins mentioned above, it is preferable to include a polyolefin resin or a polyester resin with low gas permeability.

[0167] Specific examples of polyolefin resins include polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), various ethylene copolymers such as ethylene-vinyl alcohol copolymer resins, polypropylene resins, cyclic polyolefin resins, methylpentene polymers, acid-modified polyolefin resins, etc., but are not limited to these.

[0168] Examples of polyester resins include polycarbonate resins, polyethylene terephthalate, and polyethylene naphthalate, but are not limited to these.

[0169] Odor Adsorbent

[0170] The odor adsorbent resin composition of the odor adsorbent molded article and the odor adsorbent contained in the odor adsorbent molded article of the present invention may include a hydrophobic zeolite having a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and furthermore, may include an inorganic porous body supporting a chemical adsorbent if necessary.

[0171] [Hypothecylinder Zeolite]

[0172] Generally, the higher the SiO2 / Al2O3 molar ratio of the zeolite, the higher the hydrophobicity, and in the present invention, the hydrophobic zeolite contained in the odor adsorption layer preferably has a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1.

[0173] Hydrophobic zeolite does not lose its odor adsorption capacity even when the packaging body or packaging material is exposed to temperatures above 230°C, and can exhibit a deodorizing effect through the adsorption of odor components.

[0174] The hydrophobic zeolite may have any external shape, such as spherical, rod-shaped, or elliptical, and may be in any form, such as powder, lump, or particle; however, from the perspective of the moldability of the resin composition containing the hydrophobic zeolite and the uniform dispersion and mixing characteristics in thermoplastic resins A and B, the powder form is preferred.

[0175] In the present invention, the average particle size of the hydrophobic zeolite can be appropriately selected to be any average particle size depending on the application, but it is preferable that the average particle size be 0.01 μm to 10 μm. Here, the average particle size is a value measured by dynamic light scattering.

[0176] When the average particle size is smaller than 0.01 μm, aggregation of hydrophobic zeolites is likely to occur, and dispersibility within thermoplastic resins A and B tends to decrease. In addition, when the average particle size is larger than 10 μm, the moldability of the resin composition containing hydrophobic zeolites tends to be poor, making it difficult to add a large amount of hydrophobic zeolites. Furthermore, since the surface area decreases, there is a possibility that a sufficient deodorizing effect cannot be obtained.

[0177] Because hydrophobic zeolites are hydrophobic, they have difficulty adsorbing highly polar water molecules, etc. Conversely, they have a high affinity for low-polarity odor molecules, hydrophobic gases, and lipophilic gases (including solvent gases), making it easy to adsorb them. Furthermore, due to the effect of alkali metals such as Ca, Na, and K, and alkaline earth metals present on the zeolite surface, the zeolite surface exhibits basicity, making it easy to adsorb acidic gases through neutralization reactions.

[0178] [Chemical Adsorbent-Supported Inorganic Porous Material]

[0179] In the present invention, the chemical adsorbent-supported inorganic porous body is an inorganic porous body on which a chemical adsorbent is supported, and has the function of adsorbing odorous organic matter or odorous substances generated from packaging during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot packs, and boils.

[0180] As a method of support, known or conventional support methods may be applied, and, for example, support may be achieved by impregnating an inorganic porous body with a solution containing a chemical adsorbent described below and drying it.

[0181] In the present invention, by including an odor adsorbent in which a chemical adsorbent is supported on an inorganic porous body in the odor adsorption layer, the adsorption capacity per unit mass of the chemical adsorbent can be significantly increased, thereby allowing for a reduction in the content of the chemical adsorbent-supported inorganic porous body within the odor adsorption layer. Furthermore, physical adsorption characteristics for the pore portions of the inorganic porous body can also be expected.

[0182] By reducing the content, a resin composition containing a chemical adsorbent-supported inorganic porous body can obtain excellent fluidity and fillability, and maintain excellent moldability required as a molding material.

[0183] In addition, the chemical adsorbent-supported inorganic porous body may have any external shape, such as spherical, rod-shaped, or elliptical, and may be in any form, such as powder, lump, or particle; however, from the perspective of the moldability of the resin composition containing the chemical adsorbent-supported inorganic porous body, and uniform dispersion and mixing characteristics in thermoplastic resins A and B, a powder form is preferred.

[0184] Although the chemical adsorbent-supported inorganic porous body can be appropriately selected to have any average particle size depending on the application, in the present invention, it is particularly preferable that the average particle size be 0.01 μm to 10 μm, more preferable that it be 0.1 μm to 8 μm, and even more preferable that it be 1 μm to 7 μm. Here, the average particle size is a value measured by dynamic light scattering.

[0185] When the average particle size is smaller than 0.01 μm, aggregation of the chemical adsorbent-supported inorganic porous body is likely to occur, and the dispersibility of the chemical adsorbent-supported inorganic porous body within thermoplastic resins A and B tends to decrease.

[0186] In addition, when the average particle size is larger than 10 μm, the moldability of the resin composition containing the chemical adsorbent-supported inorganic porous body is poor, so it tends to be difficult to contain a large amount of the chemical adsorbent-supported inorganic porous body, and there is a possibility that a sufficient adsorption effect cannot be obtained.

[0187] (Inorganic porous body)

[0188] In the present invention, any inorganic compound having a plurality of pores on its surface may be used as the inorganic porous body, such as zeolite, silicon dioxide, silicate, activated carbon, titania, inorganic phosphates such as calcium phosphate, alumina, aluminum hydroxide, magnesium hydroxide, and mixtures thereof.

[0189] In particular, it is desirable to use aluminum hydroxide, zeolite, and silicate from the perspective of safety and having a porous state with an effective pore size for the molecular size or cluster size of the adsorbed substance.

[0190] In addition, these may have any external shape, such as spherical, rod-shaped, or elliptical, and any form, such as powder, lump, or granular; however, after supporting a chemical adsorbent to form an odor adsorbent, a powder form is preferred from the perspective of moldability of the resin composition containing hydrophobic zeolite, as well as uniform dispersion and mixing characteristics in thermoplastic resins A and B.

[0191] The inorganic porous body can be appropriately selected to have any average particle size depending on the application, but in the present invention, in particular to obtain a chemical adsorbent-supported inorganic porous body with the above-mentioned average particle size, it is preferable that the average particle size is 0.01 μm to 10 μm, more preferable that it is 0.1 μm to 8 μm, and even more preferable that it is 1 μm to 7 μm.

[0192] (Chemical adsorbent)

[0193] In the present invention, the chemical adsorbent is a compound having a reactive functional group that reacts chemically with and binds to malodorous organic matter or malodorous substances generated by the decomposition of resins during sterilization or disinfection treatment, and which can also be supported on the aforementioned inorganic porous body.

[0194] More specifically, it is a compound having a functional group that has the reactivity to bind with various aldehydes, ketones, carboxylic acids, etc. generated during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot packs, and boiling.

[0195] Examples of such compounds include compounds having basic functional groups such as amino groups or hydroxyl groups, metal carbonates, metal bicarbonates, and compounds containing amide groups. Specific examples of each of these compounds include the following, but are not limited to them.

[0196] Examples of compounds containing amino groups include alkylamines, ethylenediamine, tetramethylenediamine, diethylenetriamine, triethylenetriamine, tetraethylenepentamine, piperazine, metaphenylenediamine, polyamines, etc.

[0197] Examples of compounds having a hydroxyl group include metal hydroxides such as sodium hydroxide, potassium hydroxide, magnesium hydroxide, and iron hydroxide.

[0198] Examples of metal carbonates include sodium carbonate and calcium carbonate.

[0199] Examples of metal bicarbonates include sodium bicarbonate.

[0200] Examples of compounds containing amide groups include 2-acrylamide-2-methylpropanesulfonic acid.

[0201] In the present invention, a compound having an amino group is preferred as a chemical adsorbent that exhibits a particularly excellent adsorption effect.

[0202] The adsorption mechanism of a chemical adsorbent for adsorbed substances such as organic matter or odor substances will be explained in more detail using specific examples of FIG. 3 (a) to (b), but the present invention is not limited to these.

[0203] For example, when the substance to be adsorbed (malodorous substance) is an acidic malodorous substance, as shown in FIG. 3(a), a compound having, for example, a hydroxyl group can be selected as a chemical adsorbent and supported on an inorganic porous body to be used as a chemical adsorbent-supported inorganic porous body. Accordingly, the carboxyl group and the hydroxyl group undergo a chemical reaction and combine, and the substance to be adsorbed is adsorbed.

[0204] In addition, when the substance to be adsorbed is an aldehyde, as shown in FIG. 3(b), a compound having an amino group, for example, can be selected as a chemical adsorbent and supported on an inorganic porous body to be used as a chemical adsorbent-supported inorganic porous body. Accordingly, the aldehyde group and the amino group undergo a chemical reaction and combine, thereby adsorbing the substance to be adsorbed.

[0205] In this case, since it is chemical adsorption, the adsorbed target substance (odor substance) does not detach once adsorbed, and odor adsorption can be performed efficiently.

[0206] Furthermore, unlike physical adsorbents in which the target substance (malodorous substance) and water vapor are adsorbed at the same adsorption site, the chemical adsorbent in the present invention binds the target substance to specific functional groups of the chemical adsorbent, so it is difficult to be affected by various substances that reduce odor adsorption capacity, such as water vapor.

[0207] <Preparation of a resin composition for molded odor-adsorbing products>

[0208] As a method for mixing the odor adsorbent and thermoplastic resin A, known or conventional mixing methods may be applied.

[0209] It is possible to directly mix and knead the odor adsorbent with thermoplastic resin A, or to produce a masterbatch by mixing the odor adsorbent with thermoplastic resin B at a high concentration and then melt-kneading it, and then mixing and melt-kneading this with thermoplastic resin A in proportions according to the target content, using the so-called masterbatch method.

[0210] The content of hydrophobic zeolite in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0211] The content of the chemical adsorbent-supported inorganic porous body in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0212] In the case of the master batch method, even in a combination of an odor adsorbent prone to aggregation and thermoplastic resin A, the odor adsorbent can be homogeneously dispersed within thermoplastic resin A.

[0213] At this time, the thermoplastic resin B in the master batch may or may not be the same as the thermoplastic resin A in the odor-adsorbing molded article resin composition. Depending on the purpose, the same type of thermoplastic resin may also be combined.

[0214] For example, if the odor adsorbent and thermoplastic resin B are melt-mixed in advance, homogeneous and good moldability and odor adsorption properties can be obtained when the thermoplastic resin B is mixed or melt-mixed again.

[0215] In the odor adsorption molded article resin composition, it is possible to include a thermoplastic resin other than thermoplastic resin A, but it is preferable to have a melt flow rate equivalent to that of thermoplastic resin A, and it can be used within a range that does not significantly affect the moldability and odor adsorption properties of the odor adsorption molded article resin composition.

[0216] Molding of odor-adsorbing molded products

[0217] An odor-adsorbing molded article can be produced at 100 to 250°C by known molding means such as injection molding or transfer molding using an odor-adsorbing molded article resin composition.

[0218] <Contents Extraction Port>

[0219] The odor-adsorbing molded article of the present invention can be used in the contents extraction port of a packaging body, such as a packaging bag.

[0220] The contents extraction port is an inlet / outlet for filling and / or extracting contents, and the filling and extraction of contents may be performed using one contents extraction port, or two or more may be provided to perform the filling and extraction of contents using separate contents extraction ports.

[0221] There are no specific restrictions on the attachment location of the contents extraction port, but it is preferable to attach it near the end of the packaging.

[0222] The contents extraction port may be composed of a lower flange, a cylindrical part attached to the hole of the inner pocket by the flange, and a cap fitted and fixed to the opening of the cylindrical part, as shown in FIG. 2, for example.

[0223] It is preferable that the spout, connector, and cap are all formed from an odor-adsorbing molded article resin composition, and each may have the same composition or a different composition.

[0224] Packaging bag

[0225] The packaging pouch in which the odor-adsorbing molded article of the present invention is used as a contents extraction port is a packaging pouch filled with contents, for example, a liquid contents packaging pouch.

[0226] A packaging bag can be manufactured by using a packaging material having heat sealability, for example, folding and bending the packaging material so that the sides with good heat sealability face each other, or by overlapping two sheets together, and then heat sealing the surrounding edges according to a heat seal type such as a side seal type, a two-sided seal type, a three-sided seal type, a four-sided seal type, an envelope attachment seal type, a fold attachment seal type (pillow seal type), a pleated attachment seal type, a flat bottom seal type, a corner bottom seal type, a gadget type, etc.

[0227] As a heat seal method, known methods such as bar seals, rotary roll seals, belt seals, impulse seals, high-frequency seals, and ultrasonic seals may be applied.

[0228] <BIB 포장 주머니>

[0229] A BIB (Bag In Box) packaging bag is a packaging body that houses a packaging bag or molded container equipped with a contents extraction port in a cardboard box or the like.

[0230] <Contents>

[0231] In the present invention, there are no particular restrictions on the contents, but the odor-adsorbing molded article or packaging pouch of the present invention is suitable for food or pharmaceutical products that are subjected to sterilization or disinfection treatment, or where odor components are transferred, causing spoilage or change of odor.

[0232] Liquid contents include beverages, juices, intravenous fluids, seasoning liquids such as soy sauce and sauces, and liquids in general such as tsuyu, honey, seasonings, and dressings.

[0233] Regarding Assignment 2

[0234] Odor-absorbing sealant film

[0235] The odor-adsorbing sealant film of the present invention comprises at least an outer layer film and an inner layer film, as shown in FIGS. 4 and 5, and the outer layer film and the inner layer film are only partially bonded to each other.

[0236] The partial bonding portion between the outer layer film and the inner layer film is preferably located at least at the periphery of the odor-adsorbing sealant film, and may be a grid shape formed by continuous lines, a shape formed by discontinuous lines, or a dot shape.

[0237] When the odor-adsorbing sealant film of the present invention is used as a packaging material, fatigue failure progresses due to localized repeated bending caused by vibration during the packaging process or transportation, or contact with packaging components such as contents extraction ports. Since this can lead to the generation of pinholes that cause leakage of liquid contents when used as a packaging material for liquid contents in BIBs, pinhole resistance is particularly important for packaging materials used for purposes such as food and medical supplies.

[0238] When used for aseptic filling, the packaging is sterilized with electron beams, gamma rays, or ethylene oxide gas, etc., and then supplied to the next process or user.

[0239] <Layer composition of outer and inner film>

[0240] Each of the outer layer film and the inner layer film is a film having a sealant layer containing at least low-release polyethylene.

[0241] In addition, the sealant layer of the inner film includes an odor adsorption layer. Furthermore, if necessary, the sealant layer of the outer film may also include an odor adsorption layer.

[0242] The sealant layer having an odor adsorption layer may be a layer containing only an odor adsorption layer as shown in FIG. 6, or a multilayer structure including an odor non-adsorption layer containing low-release polyethylene but not an odor adsorbent, as shown in FIG. 7 and FIG. 8, in order to improve seal strength and interlayer adhesion strength.

[0243] In addition, as shown in Fig. 9, the odor adsorption layer may have a multilayer structure in which the type of low-release polyethylene, the type and content of the odor adsorbent are the same or different.

[0244] In a packaging bag using the odor-adsorbing sealant film of the present invention, the innermost layer in contact with the liquid contents may be an odor-adsorbing layer or an odor-non-adsorbing layer. If the odor-non-adsorbing layer is the innermost layer, the seal strength of the packaging bag can be improved, and if the odor-adsorbing layer is the innermost layer, the interlayer adhesion strength within the packaging bag can be improved.

[0245] In addition, the outer layer film and the inner layer film may each include a base layer, a functional layer such as a reinforcing layer, an adhesive layer, etc., as shown in FIG. 10, in order to provide various functions to improve the strength of the film, and it is particularly preferable that the outer layer film includes a base layer. The base layer, functional layer, and adhesive layer may be used by laminating known materials in a known manner.

[0246] Sealant layer of outer layer film and inner layer film

[0247] The sealant layer of the inner film includes an odor adsorption layer and may also include an odor non-adsorption layer.

[0248] The sealant layer of the outer film may include an odor non-adsorbent layer and / or an odor adsorbent layer.

[0249] [Odor Adsorption Layer]

[0250] The odor adsorption layer in the present invention comprises a resin composition including low-release polyethylene and an odor adsorbent.

[0251] Furthermore, general-purpose polyethylene, polypropylene, methylpentene polymer, acid-modified polyolefin resin, and mixtures of their thermoplastic resins may be included within a range that does not impair the low leaching or heat sealing properties of the sealant film, but are not limited to these resins.

[0252] In one embodiment of the present invention, the odor adsorption layer is a single layer formed using a resin composition obtained by kneading an odor adsorbent and low-release polyethylene. Here, the odor adsorbent may be uniformly dispersed within the layer or dispersed with a concentration gradient.

[0253] For example, when forming the packaging, it may be dispersed with a concentration gradient having an increasing trend from the inner surface to the outer surface, and this configuration improves heat sealability. Conversely, when forming the packaging, it may be dispersed with a concentration gradient having a decreasing trend from the inner surface to the outer surface, and this configuration improves interlayer adhesion strength.

[0254] Furthermore, the odor adsorption layer may be dispersed with a concentration gradient having a decreasing trend from the center in the thickness direction toward both surfaces, and this configuration improves heat sealability and interlayer adhesion strength.

[0255] In another embodiment, the odor adsorption layer may be a multilayer structure in which two or more layers are stacked, wherein each layer may contain a resin composition having a different type of low-release polyethylene as the main component, or a different type and content of odor adsorbent.

[0256] Although it is possible to form a film if the total thickness of the odor adsorption layer is 5 μm or more, in order to obtain good film formation, heat sealing properties, interlayer adhesion strength, and odor adsorption properties, it is preferable to have a thickness of 10 μm to 200 μm.

[0257] The odor adsorbent comprises hydrophobic zeolite and, furthermore, may comprise an inorganic porous body supporting a chemical adsorbent.

[0258] It is possible to directly mix and knead hydrophobic zeolites or inorganic porous materials supported by chemical adsorbents with low-leaching polyethylene, or to produce a masterbatch by mixing hydrophobic zeolites or inorganic porous materials supported by chemical adsorbents with a thermoplastic resin at a high concentration and then melt-kneading, and then mixing and melt-kneading this with low-leaching polyethylene in proportions according to the target content using the so-called masterbatch method.

[0259] In the present invention, the amount of hydrophobic zeolite added is such that a sufficient odor adsorption effect can be achieved if it is contained in an amount of 0.05 mass% or more within the sealant layer including the odor adsorption layer; however, to obtain a good odor adsorption effect as a packaging material, it is preferable that the amount be 0.1 mass% or more, and more preferable that it be 0.25 mass% or more. Meanwhile, to obtain good film-forming properties when manufacturing a laminate, and to achieve good heat sealing properties, the content of hydrophobic zeolite is preferably 13 mass% or less, and more preferable that it be 10 mass% or less.

[0260] The content of the chemical adsorbent-supported inorganic porous body can be sufficiently adsorbed if it is contained in the sealant layer including the odor adsorption layer at 0.05 mass% or more, but to obtain a good adsorption effect as a packaging body, it is preferable that it be 0.1 mass% or more, and more preferable that it be 0.25 mass% or more.

[0261] Meanwhile, in order to obtain good film formation properties when manufacturing a laminate and to achieve good heat sealing properties, the content of the chemical adsorbent-supported inorganic porous body is preferably 10 mass% or less in the sealant layer including the odor adsorption layer, and more preferably 9 mass% or less.

[0262] [Low-leaching polyethylene]

[0263] In the present invention, the sealant layer of the outer layer film and the inner layer film contains low-leaching polyethylene having heat sealing properties and a low amount of organic matter leaching.

[0264] By reducing the amount of organic matter leaching, the concentration of organic matter leaching into the liquid contents filled in the packaging of the present invention can be reduced, thereby suppressing changes in taste.

[0265] Here, the concentration of organic matter in the liquid contents is indicated in the present invention by the concentration of total organic carbon (TOC).

[0266] TOC is a measure that expresses the total concentration of oxidizable organic matter (organic carbon) in water as a carbon concentration. It is used as one of the representative water quality indicators and is standardized as JIS K 0805 (Organic Carbon (TOC) Automatic Measurement Instrument).

[0267] The concentration of leaching TOC contained in the film containing the above low-leaching polyethylene is 1.5 ppm or more and 250 ppm or less.

[0268] Here, the reason for measuring the concentration of leaching TOC regarding the low-leaching polyethylene as a monomeric raw material in a film-formed state rather than in a state such as raw material pellets is that when low-leaching polyethylene is formed into a film, such as for the formation of a sealant layer, various thermal histories may be applied, which can increase the amount of TOC leaching.

[0269] In the present invention, when 1 kg of distilled water is filled as a filling water and leached into a pouch packaging bag made of low-leaching polyethylene with a thickness of 15 cm × 44 cm × 50 μm, the increase concentration of TOC in the filling water is preferably 0.01 ppm or more and 1.5 ppm or less, more preferably 0.02 ppm or more and 1.45 ppm or less, and even more preferably 0.025 ppm or more and 1.4 ppm or less.

[0270] If the increase in TOC concentration in the filling water is greater than 1.5 ppm, it is difficult to suppress the change in taste of the filling water, and while the cost increases to obtain a value less than 0.01 ppm, the effect is limited. From the perspective of balancing cost and performance, the above-mentioned range is desirable.

[0271] As a method for determining the specific increase in TOC concentration, for example, 1000 g of distilled water at 40°C to 80°C is filled into the pouch packaging bag described above as the filling water, and after storing it at 25°C to 50°C for several days to 4 weeks, the TOC concentration of the filling water is measured using a total organic carbon meter or HS-GC, and the TOC concentration of the distilled water is obtained by subtracting the blank.

[0272] In the present invention, a packaging body of pouch (15 cm × 44 cm) is produced using an outer layer film, an inner layer film, and an odor-adsorbing sealant film, and 1000 g of water at 65°C (distilled water for high-speed liquid chromatography, Junseikagaku) ​​is filled to produce a packaging body liquid filler, and after storing at 35°C for 2 weeks, the TOC concentration of the filled water is measured using a TOC-L total organic carbon system manufactured by Shimadzu Seisakusho Co., Ltd. as a standard method to determine the increase in TOC concentration.

[0273] Then, the concentration of leaching TOC contained in the sealant film is calculated from the increased TOC concentration of the obtained filling water and the mass parts of the filling water and sealant film.

[0274] Specific examples of low-solubility polyethylene include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, and mixtures of these resins, but are not limited to these resins.

[0275] To reduce the amount of organic matter leached from low-leaching polyethylene films, the following methods may be used, but are not limited to these.

[0276] When manufacturing polyethylene, it is effective to reduce the amount of unreacted raw materials, low molecular weight products, or by-products, or to remove polymerization catalysts. Specifically, methods include improving the purity of raw materials, precisely controlling conditions such as reaction temperature or pressure, removing unreacted raw materials, low molecular weight products, by-products, or polymerization catalysts through distillation or washing, or preventing oxidation caused by exposure to oxygen in the air at high temperatures.

[0277] When pelletizing manufactured polyethylene, methods such as limiting the use of lubricants, antioxidants, and other additives that increase the leaching amount of organic matter can be used.

[0278] When forming polyethylene into a film, methods such as limiting the use of lubricants, antioxidants, solvents, and other additives that increase the leaching amount of organic matter can be used to prevent oxidation caused by high temperatures.

[0279] In the present invention, the packaging material made of an odor-adsorbing sealant film, in which the sealant layer has heat sealing properties and contains low-leaching polyethylene, has excellent heat sealing properties, has a low amount of organic matter leaching, and can reduce the increase in TOC concentration of the liquid contents within the packaging.

[0280] In addition, polyethylene is suitable in that it has the property of being resistant to sterilization and disinfection treatments such as UV and is difficult to decompose.

[0281] Among these low-leaching polyethylenes, LLDPE is preferred as the type, and furthermore, since LLDPE having C4, C6, and C8 side chains tends to reduce the leaching amount of organic matter, C4-LLDPE, C6-LLDPE, C8-LLDPE, etc. are more preferred.

[0282] Here, C4, C6, and C8 indicate that monomers with the specified number of carbon atoms are present in the side chains after partial copolymerization with LLDPE. For example, C4 represents a side chain with the structure of butene-1, C6 represents a side chain with the structure of hexene-1 or 4-methylpentene-1, and C8 represents a side chain with the structure of octene-1.

[0283] Alternatively, low-leaching polyethylene with a density of 0.90 g / cm³ or higher and 0.94 g / cm³ or lower is preferred, and low-leaching polyethylene with a density of 0.905 g / cm³ or higher and 0.933 g / cm³ or lower is more preferred. Low-leaching polyethylene with a density in this range tends to reduce the amount of organic matter leached out.

[0284] In addition, low-leaching polyethylene may contain small amounts of additives such as antioxidants or anti-blockers.

[0285] Furthermore, the low-solubility polyethylene in the present invention is preferably excellent in resistance to pinholes caused by bending when formed into a single film.

[0286] In the present invention, the pinhole resistance of the low-release polyethylene is such that, for example, the number of pinholes generated after 5,000 cycles of gelboplex at 23°C in a 50 μm thick film comprising a low-release polyethylene monomer is 0 or 1 or more and 160 or less.

[0287] If the number of pinholes in the sealant film falls within the above range, a packaging material capable of withstanding practical use can be produced for applications requiring pinhole resistance.

[0288] [Odor Adsorbent]

[0289] In the present invention, the odor adsorbent comprises a specific hydrophobic zeolite and further may comprise an inorganic porous body supporting a chemical adsorbent.

[0290] (Hypothecylinder zeolite)

[0291] Same as the case for Task 1 above.

[0292] (Chemical adsorbent-supported inorganic porous material)

[0293] In the present invention, the chemical adsorbent-supported inorganic porous body is an inorganic porous body on which a chemical adsorbent is supported, and has the function of adsorbing odor substances generated from packaging during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot packs, and boils.

[0294] As a method of support, known or conventional support methods may be applied, and, for example, a solution containing a chemical adsorbent described below may be impregnated into an inorganic porous body and supported by drying.

[0295] In the present invention, by including an odor adsorbent in an odor adsorption layer in which a chemical adsorbent is supported on an inorganic porous body, the adsorption capacity per unit mass of the chemical adsorbent can be significantly increased, and the content of the inorganic porous body supporting the chemical adsorbent within the odor adsorption layer can be reduced. Furthermore, physical adsorption characteristics for the pore portions of the inorganic porous body can also be expected.

[0296] By reducing the content, high seal strength can be obtained, thereby maintaining the excellent heat sealability and film-forming properties required for a sealant film.

[0297] In addition, the chemical adsorbent-supported inorganic porous body may have any external shape, such as spherical, rod-shaped, or elliptical, and any form, such as powder, lump, or particle; however, a powder form is preferred from the perspective of the film-forming properties of the odor adsorption layer and uniform dispersion or mixing characteristics in the thermoplastic resin.

[0298] The chemical adsorbent-supported inorganic porous body can be appropriately selected to have any average particle size depending on the application, but in the present invention, it is particularly preferable that the average particle size be 0.01 μm to 10 μm, more preferable that it be 0.1 μm to 8 μm, and even more preferable that it be 1 μm to 7 μm. Here, the average particle size is a value measured by the dynamic light scattering method.

[0299] When the average particle size is smaller than 0.01 μm, aggregation of the chemical adsorbent-supported inorganic porous material is likely to occur, and the dispersibility of the chemical adsorbent-supported inorganic porous material in low-leaching polyethylene tends to decrease.

[0300] In addition, when the average particle size is larger than 10 μm, the film-forming ability of the odor adsorption layer is poor, so it tends to be difficult to contain a large amount of chemical adsorbent-supported inorganic porous material, and there is a possibility that a sufficient adsorption effect cannot be obtained.

[0301] (Inorganic porous body)

[0302] In the present invention, any inorganic compound having a plurality of pores on its surface may be used as the inorganic porous body, such as zeolite, silicon dioxide, silicate, activated carbon, titania, inorganic phosphates such as calcium phosphate, alumina, aluminum hydroxide, magnesium hydroxide, and mixtures thereof.

[0303] In particular, it is desirable to use aluminum hydroxide, zeolite, and silicate from the perspective of safety and having a porous state with an effective pore size for the molecular size or cluster size of the adsorbed substance.

[0304] In addition, these may have any external shape, such as spherical, rod-shaped, or elliptical, and any form, such as powder, lump, or particle; however, after supporting a chemical adsorbent to form an odor adsorbent, a powder form is preferred from the perspective of the film-forming properties of the odor adsorption layer and uniform dispersion or mixing characteristics in the thermoplastic resin.

[0305] The inorganic porous body can be appropriately selected to have any average particle size depending on the application, but in the present invention, in particular to obtain a chemical adsorbent-supported inorganic porous body with the above-mentioned average particle size, it is preferable that the average particle size is 0.01 μm to 10 μm, more preferable that it is 0.1 μm to 8 μm, and even more preferable that it is 1 μm to 7 μm.

[0306] (Chemical adsorbent)

[0307] Same as the case for Task 1 above.

[0308] Method for manufacturing outer layer film or inner layer film

[0309] (Dispersion method of odor adsorbent)

[0310] As a method for mixing the odor adsorbent and the low-leaching polyethylene, known or conventional mixing methods may be applied.

[0311] It is possible to directly mix and knead the odor adsorbent with low-leaching polyethylene, or to produce a masterbatch by mixing the odor adsorbent with a high concentration of thermoplastic resin and then melt-kneading it, and then mixing and melt-kneading this with low-leaching polyethylene in proportions according to the target content using the so-called masterbatch method.

[0312] The content of hydrophobic zeolite in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0313] The content of the chemical adsorbent-supported inorganic porous body in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0314] In the case of the masterbatch method, even with a combination of an odor adsorbent prone to aggregation and low-release polyethylene, the odor adsorbent can be homogeneously dispersed within the low-release polyethylene.

[0315] At this time, the thermoplastic resin in the masterbatch may or may not be the same as the low-release polyethylene in the odor adsorption layer. Depending on the purpose, it is possible to combine the same low-release polyethylene or other types of thermoplastic resins.

[0316] For example, if an odor adsorbent and low-release polyethylene are melt-mixed in advance, when the low-release polyethylene is mixed or melt-mixed again, homogeneous and good film-forming properties, heat sealing properties, interlayer adhesion strength, and odor adsorption properties can be obtained.

[0317] Thermoplastic resins other than low-release polyethylene in the odor adsorption layer may include general-purpose non-low-release polyethylene, polypropylene, methylpentene polymer, acid-modified polyolefin resin, polyolefin resins, and mixtures of these resins, but are not limited to these resins.

[0318] The above thermoplastic resin preferably has low leaching properties equivalent to those of the low leaching polyethylene in the present invention, but a general-purpose resin may be used within a range that does not significantly affect the amount of organic matter leached from the entire sealant layer.

[0319] (Preparation and stacking methods)

[0320] In the present invention, the film formation and lamination methods of each layer of the outer layer film or inner layer film are not particularly limited, and known or conventional film formation and lamination methods may be applied.

[0321] An odor adsorbent layer or an odor non-adsorbent layer may be laminated by extrusion coating on another layer through an adhesive layer, or, for example, a plurality of odor adsorbent layers and odor non-adsorbent layers may be formed by co-extrusion by an inflation method or a casting method.

[0322] In the case of lamination by extrusion coating, first, a resin composition forming an odor adsorption layer or a resin composition forming an odor non-adsorption layer is heated and melted, then expanded and stretched in the required width direction using a T-die and extruded in a curtain shape, and the molten resin is flowed onto the surface to be laminated, and by clamping it with a rubber roll and a cooled metal roll, the formation of the odor adsorption layer or the odor non-adsorption layer, as well as adhesion to and lamination to the surface to be laminated, are performed simultaneously.

[0323] In the case of lamination by extrusion coating, the melt flow rate (MFR) of the low-leaching polyethylene included in the odor adsorption layer or the thermoplastic resin included in the odor non-adsorption layer is preferably 0.2 to 50 g / 10 min, and more preferably 0.5 to 30 g / 10 min. In addition, in this specification, MFR refers to a value measured by a method in accordance with JIS K7210.

[0324] If the MFR is less than 0.2 g / min or greater than 50 g / min, it is difficult to be effective in terms of processing suitability.

[0325] When using the inflation method, the melt flow rate (MFR) of the low-release polyethylene included in the odor adsorption layer or the thermoplastic resin included in the odor non-adsorption layer is preferably 0.2 to 10.0 g / 10 min, and more preferably 0.2 to 9.5 g / 10 min.

[0326] If the MFR is less than 0.2 g / 10 min or greater than 10.0 g / 10 min, it tends to be inferior in terms of processing suitability.

[0327] Alternatively, the pre-fabricated odor adsorbent layer and odor non-adsorbent layer may be laminated through an adhesive layer by dry lamination, non-adsorbent lamination, sand lamination, etc.

[0328] <Adhesive layer>

[0329] In the present invention, it is also possible to laminate by forming an adhesive layer between each layer, such as between each layer within the sealant layer or between the sealant layer and the substrate layer.

[0330] The adhesive layer may include an adhesive or any anchor coat agent.

[0331] The adhesive may be a heat-curing type, UV-curing type, electron beam-curing type, etc., and may be in any form such as a water-based type, solution type, emulsion type, dispersion type, etc., and its properties may be in any form such as a film / sheet type, powder type, solid type, etc., and furthermore, regarding the bonding mechanism, it may be in any form such as a chemical reaction type, solvent volatilization type, heat melting type, heat pressing type, etc.

[0332] In addition, the adhesive layer may be a layer including an EC (extrusion coating) layer, an adhesive for dry lamination, an adhesive for non-adhesive lamination, etc.

[0333] Components forming such an adhesive layer include polyvinyl acetate-based adhesives such as polyvinyl acetate or vinyl acetate-ethylene copolymer; polyacrylic acid-based adhesives comprising copolymers of polyacrylic acid with polystyrene, polyester, polyvinyl acetate, etc.; cyanoacrylate-based adhesives; ethylene copolymer-based adhesives comprising copolymers of ethylene with monomers such as vinyl acetate, ethyl acrylate, acrylic acid, and methacrylic acid; cellulose-based adhesives; polyurethane-based adhesives; polyester-based adhesives; polyamide-based adhesives; polyimide-based adhesives; polyolefin-based adhesives such as LDPE; amino resin-based adhesives comprising urea resin or melamine resin, etc.; phenolic resin-based adhesives; epoxy-based adhesives; reactive (meth)acrylic-based adhesives; elastomer-based adhesives comprising chloroprene rubber, nitrile rubber, styrene-butadiene rubber, etc.; silicone-based adhesives; and inorganic adhesives comprising alkali metal silicates, low-melting point glass, etc. there is.

[0334] As anchor coat agents, for example, organic titanium-based, isocyanate-based, polyethyleneimine-based, acid-modified polyethylene-based, and polybutadiene-based anchor coat agents may be used.

[0335] When laminating an adhesive layer with an extrusion coating, it is not particularly limited, but can be formed by extrusion coating an adhesive onto the adhesive target layer.

[0336] In extrusion coating, first, the adhesive is heated and melted, then expanded and stretched in the required width direction using a T-die and extruded in a curtain shape, and the molten material is flowed onto the target layer for adhesion, and by clamping it with a rubber roll and a cooled metal roll, the formation of the adhesive layer and adhesion and lamination to the target layer are performed simultaneously.

[0337] When using a dry laminate adhesive as the adhesive layer, the adhesive dispersed or dissolved in a solvent is applied onto one layer and dried, and then another adhesive target layer is laminated and the adhesive is cured by aging at 30 to 120°C for several hours to several days.

[0338] When using a non-removable adhesive for laminates, the adhesive itself is applied onto a layer without being dispersed or dissolved in a solvent and dried, and then another layer to be bonded is laminated, and the adhesive is cured by aging at 30 to 120°C for several hours to several days.

[0339] The adhesive layer is formed by applying the adhesive, for example, as a roll coat, gravure roll coat, or kiss coat, and the coating amount is preferably about 0.1 to 10 g / m² (dry state). Good adhesion can be obtained by setting the coating amount of the adhesive to the above range.

[0340] When laminating by sand lamination, any resin that can be applied by heating and melting with an extruder can be used for the adhesive layer. Specifically, a thermoplastic resin used for the aforementioned odor-non-adsorbent layer can be preferably used.

[0341] Packaging Materials

[0342] The odor-adsorbing sealant film of the present invention can be used as is or, if necessary, laminated with a substrate layer or a functional layer to produce packaging materials. In particular, it is suitable as a packaging material for liquid contents in BIBs.

[0343] <Packaging, Liquid Contents Packaging Bag for BIBs>

[0344] The packaging of the present invention is used, for example, as a packaging bag for liquid contents for BIBs, and is provided for filling contents in a sealed state with a cap attached to the contents extraction port. That is, when used for normal purposes, the sealed packaging of liquid contents for BIBs is placed in a cardboard box and supplied to the user, but when used for aseptic filling, the sealed packaging of liquid contents for BIBs is supplied to the user after being sterilized with electron beams, gamma rays, or ethylene oxide gas.

[0345] The liquid contents packaging pouch for BIB according to the present invention is composed of a double pouch portion using a packaging material made of at least the odor-adsorbing sealant film of the present invention, as shown in FIG. 11, for example, and a contents extraction port including a resin molded article.

[0346] The double pocket portion is composed of an upper film and a lower film as shown in FIGS. 11 and 12, and the contents extraction port is attached to the upper film.

[0347] <Liquid Contents>

[0348] In the present invention, the term "liquid contents" refers to all liquids such as beverages, juices, intravenous fluids, soy sauce, sauces, seasoning liquids, tsuyu, honey, seasonings, dressings, etc.

[0349] [Method of manufacturing the packaging]

[0350] The packaging body of the present invention can be manufactured by folding and bending the packaging material so that the sealant layer of the upper film with the contents extraction opening attached and the sealant layer of the lower film face each other, as shown in FIG. 12, for example, and then overlapping two sheets together and heat-sealing the peripheral ends using a heat-sealing type such as a side seal type, a two-way seal type, a three-way seal type, a four-way seal type, an envelope attachment seal type, a joint attachment seal type (pillow seal type), a pleated attachment seal type, a flat bottom seal type, an angled bottom seal type, a gadget type, etc.

[0351] As a heat seal method, known methods such as bar seals, rotary roll seals, belt seals, impulse seals, high-frequency seals, and ultrasonic seals may be applied.

[0352] As a method for attaching a content extraction port to an upper film, a hole is made at the attachment location of the content extraction port on the upper film, the content extraction port is inserted into the hole from the inside of the upper film, the inner surface of the upper film is heat-sealed to the outside of the flange of the content extraction port to fix it, and a cap is placed over the content extraction port to seal it.

[0353] <Contents Extraction Port>

[0354] The contents extraction port is an inlet / outlet for filling and / or extracting contents, and the filling and extraction of contents may be performed using one contents extraction port, or two or more may be provided to perform the filling and extraction of contents using separate contents extraction ports.

[0355] There are no specific restrictions on the attachment location of the contents extraction port, but it is preferable to attach it near the four sides of the packaging.

[0356] The contents extraction port contains a polyolefin resin.

[0357] Specific examples of polyolefin resins include polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), various ethylene copolymers, polypropylene resins, cyclic polyolefin resins, methylpentene polymers, acid-modified polyolefin resins, etc., but are not limited to these.

[0358] From the perspective of moldability, it is desirable that the melt flow rate of the polyolefin resin be 5 g / min or more and 100 g / min or less.

[0359] In addition, the contents extraction port may contain various plastic compounding agents or additives for the purpose of improving or modifying processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, etc.

[0360] In addition, the contents extraction port may contain low-release polyethylene or an odor adsorbent as needed.

[0361] A content extraction port can be obtained by preparing a resin composition by mixing and kneading the various raw materials mentioned above in a known manner, and molding the resin composition in a known manner.

[0362] Regarding Assignment 3

[0363] <Layer Composition of Odor Adsorption Laminate>

[0364] The odor adsorption laminate of the present invention comprises at least a substrate layer, an adhesive layer, and a sealant layer, wherein the adhesive layer and / or the sealant layer contains an odor adsorbent.

[0365] Odor Adsorbent

[0366] In the present invention, the odor adsorbent comprises a specific hydrophobic zeolite and further may comprise an inorganic porous body supporting a chemical adsorbent.

[0367] The odor adsorbent may be directly mixed and kneaded with the resin constituting each layer, or it may be used by the so-called masterbatch method, in which a masterbatch is produced by mixing with thermoplastic resin A at a high concentration and then melt-kneading, and then mixing and melt-kneading this with the resin constituting each layer in a ratio according to the target content.

[0368] [Masterbatch formation of odor adsorbents]

[0369] By master-batching, even in combinations of odor adsorbents prone to aggregation and resins constituting each layer, the odor adsorbent can be homogeneously dispersed within the resin.

[0370] As a method for mixing the odor adsorbent and thermoplastic resin A, known or conventional mixing methods may be applied.

[0371] At this time, thermoplastic resin A in the master batch may or may not be the same as the resin in each layer. Depending on the purpose, the same resin or different types of resin may be combined.

[0372] For example, if thermoplastic resin A is the same as the resin constituting each layer, when the thermoplastic resin A is mixed or melt-kneaded again for each layer, homogeneous and good film-forming properties, interlayer adhesion strength, heat sealing properties, etc. can be maintained, and excellent odor adsorption properties can be obtained.

[0373] The content of the odor adsorbent in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0374] The content of hydrophobic zeolite in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0375] The content of the chemical adsorbent-supported inorganic porous body in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0376] [Thermoplastic Resin A]

[0377] In the master batch of the odor adsorbent, the thermoplastic resin A that disperses the odor adsorbent is capable of dispersing the odor adsorbent within the master batch, has good affinity with the resin of each layer of the master batch, and can be easily mixed and homogenized. There are no particular limitations, and the same resin or different types of resin can be combined depending on the purpose.

[0378] [Hypothecylinder Zeolite]

[0379] Generally, the higher the SiO2 / Al2O3 molar ratio of the zeolite, the higher the hydrophobicity, and in the present invention, the hydrophobic zeolite contained in the odor adsorption layer preferably has a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1.

[0380] Hydrophobic zeolite does not lose its odor adsorption capacity even when the packaging body or packaging material is exposed to temperatures above 230°C, and can exhibit a deodorizing effect through the adsorption of odor components.

[0381] Hydrophobic zeolites may have any external shape, such as spherical, rod-shaped, or elliptical, and any form, such as powder, lump, or particle; however, a powder form is preferred from the perspective of uniform dispersion and mixing characteristics in the resin, as well as subsequent film-forming properties.

[0382] In the present invention, the average particle size of the hydrophobic zeolite can be appropriately selected to be any average particle size depending on the application, but an average particle size of 0.01 μm to 10 μm is preferred. Here, the average particle size is a value measured by dynamic light scattering.

[0383] When the average particle size is smaller than 0.01 μm, aggregation of hydrophobic zeolites is likely to occur, and dispersibility within the resin tends to decrease. In addition, when the average particle size is larger than 10 μm, film-forming properties tend to be inferior, making it difficult to add a large amount of hydrophobic zeolites, and furthermore, since the surface area decreases, there is a possibility that a sufficient deodorizing effect cannot be obtained.

[0384] Because hydrophobic zeolites are hydrophobic, they have difficulty adsorbing highly polar water molecules, but conversely, they have a high affinity for low-polarity odor molecules, hydrophobic gases, and lipophilic gases (including solvent gases), making it easy to adsorb them. Furthermore, due to the effect of alkali metals such as Ca, Na, and K, and alkaline earth metals present on the zeolite surface, the zeolite surface exhibits basicity, making it easy to adsorb acidic gases through neutralization reactions.

[0385] [Chemical Adsorbent-Supported Inorganic Porous Material]

[0386] In the present invention, the chemical adsorbent-supported inorganic porous body is an inorganic porous body on which a chemical adsorbent is supported, and has the function of adsorbing odor substances generated from packaging during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot packs, and boils.

[0387] As a method of support, known or conventional support methods may be applied, for example, by impregnating an inorganic porous body with a solution containing a chemical adsorbent described below and drying it.

[0388] In the present invention, by including an odor adsorbent in which a chemical adsorbent is supported on an inorganic porous body in the odor adsorption layer, the adsorption capacity per unit mass of the chemical adsorbent can be significantly increased, thereby allowing for a reduction in the content of the chemical adsorbent-supported inorganic porous body within the odor adsorption layer. Furthermore, physical adsorption characteristics for the pore portions of the inorganic porous body can also be expected.

[0389] In addition, by reducing the content, the excellent film-forming properties, adhesion, and seal strength of the included resin composition can be maintained.

[0390] In addition, the chemical adsorbent-supported inorganic porous body may have any external shape, such as spherical, rod-shaped, or elliptical, and any form, such as powder, lump, or particle; however, a powder form is preferred from the perspective of the film-forming properties of the odor adsorption layer and uniform dispersion or mixing characteristics in the thermoplastic resin.

[0391] The chemical adsorbent-supported inorganic porous body can be appropriately selected to have any average particle size depending on the application, but in the present invention, it is particularly preferable that the average particle size be 0.01 μm to 10 μm, more preferable that it be 0.1 μm to 8 μm, and even more preferable that it be 1 μm to 7 μm. Here, the average particle size is a value measured by the dynamic light scattering method.

[0392] When the average particle size is smaller than 0.01 μm, aggregation of the chemical adsorbent-supported inorganic porous body is likely to occur, and the dispersibility of the chemical adsorbent-supported inorganic porous body within the resin tends to decrease.

[0393] In addition, when the average particle size is larger than 10 μm, the film-forming ability of the resin composition contained therein tends to be inferior, so it tends to be difficult to contain a large amount of chemical adsorbent-supported inorganic porous material, and there is a possibility that a sufficient adsorption effect cannot be obtained.

[0394] (Inorganic porous body)

[0395] In the present invention, any inorganic compound having a plurality of pores on its surface may be used as the inorganic porous body, such as zeolite, silicon dioxide, silicate, activated carbon, titania, inorganic phosphates such as calcium phosphate, alumina, aluminum hydroxide, magnesium hydroxide, and mixtures thereof.

[0396] In particular, it is desirable to use aluminum hydroxide, zeolite, and silicate from the perspective of safety and having a porous state with an effective pore size for the molecular size or cluster size of the adsorbed substance.

[0397] In addition, these may have any external shape, such as spherical, rod-shaped, or elliptical, and any form, such as powder, lump, or particle; however, a powder form is preferred from the perspective of uniform dispersion or mixing characteristics in the resin and the film-forming properties of the contained resin composition after supporting a chemical adsorbent to form a chemical adsorbent-supported inorganic porous body.

[0398] The inorganic porous body can be appropriately selected to have any average particle size depending on the application, but in the present invention, in particular to obtain a chemical adsorbent-supported inorganic porous body with the above-mentioned average particle size, it is preferable that the average particle size is 0.01 μm to 10 μm, more preferable that it is 0.1 μm to 8 μm, and even more preferable that it is 1 μm to 7 μm.

[0399] (Chemical adsorbent)

[0400] Same as the case for Task 1 above.

[0401] <Subject>

[0402] The substrate layer included in the odor-adsorbing laminate of the present invention may utilize a film or sheet such as a resin film or sheet generally used as a packaging material for packaging bags, synthetic paper, or paper substrate, and it is desirable that it possesses excellent mechanical strength, such as tensile strength, flexural strength, and impact strength, as well as excellent printability.

[0403] The base layer may consist of one layer or two or more layers. In the case of two or more layers, layers of the same composition or layers of a different composition may be used.

[0404] In addition, it is preferable that the resin film or sheet be uniaxially or biaxially stretched.

[0405] Specific resins include polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate; polyamide resins such as nylon 6, nylon 66, and MXD6 (polymethoxylylene adipamide); cellophane; polyolefin resins such as polyethylene resin, polypropylene resin, and acid-modified polyolefin resin; polystyrene resin; polyurethane resin; acetal resin; EVOH, etc.

[0406] When the odor-adsorbing laminate of the present invention is used as a packaging material, a suitable material may be freely selected and used depending on usage conditions such as the type of contents to be packaged or whether or not heat treatment is performed after filling; however, among the above, polyester resin or polyamide resin is preferred.

[0407] In particular, uniaxially or biaxially stretched polyethylene terephthalate films or sheets, or biaxially stretched polypropylene films or sheets, etc., are suitable.

[0408] The resin film or sheet used in the substrate layer may, if necessary, have plastic compounding agents or additives such as lubricants, crosslinking agents, antioxidants, UV absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, and pigments added for the purpose of improving or modifying processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, etc., and the amount added may be optionally added according to the purpose within a range that does not adversely affect other performance properties.

[0409] As specific paper substrates, for example, bleached or unbleached paper substrates with high sizing, or pure white roll paper, kraft paper, cardboard, coated paper, cast-coated paper, processed paper, high-quality paper, etc. may be used.

[0410] In addition, as a paper substrate, a basis weight of about 80 to 600 g / m², preferably a basis weight of about 100 to 450 g / m², can be used.

[0411] The resin film or sheet used in the substrate layer may have a metal or metal oxide deposited thereon.

[0412] In addition, the substrate layer and the film or sheet constituting the substrate layer may be subjected to physical treatments such as corona discharge treatment, ozone treatment, low-temperature plasma treatment using oxygen or nitrogen gas, or glow discharge treatment, or chemical treatments such as oxidation treatment using chemical agents, prior to lamination to improve adhesion.

[0413] Alternatively, various coating layers, such as a primer coat layer, an undercoat layer, an anchor coat layer, an adhesive layer, or a deposition anchor coat layer, may be arbitrarily formed on the surface of the thermoplastic resin layer to serve as a surface treatment layer.

[0414] For the various coating layers mentioned above, a resin composition having, for example, a polyester resin, a polyamide resin, a polyurethane resin, an epoxy resin, a phenolic resin, a (meth)acrylic resin, a polyvinyl acetate resin, a polyolefin resin such as polyethylene or polypropylene, a copolymer or modified resin thereof, a cellulose resin, etc. as the main component of the vehicle may be used.

[0415] The thickness of the substrate layer is preferably 10 μm or more and 50 μm or less, and more preferably 15 μm or more and 40 μm or less.

[0416] If it is thinner than the above range, the rigidity of the laminate is excessively low, so it tends to be difficult to exhibit high bag-dropping strength, and if it is thicker than the above range, the rigidity of the laminate becomes excessively high, making it difficult to process the laminate and prone to deterioration in contents filling ability.

[0417] <Adhesive layer>

[0418] The odor adsorption laminate of the present invention may also be laminated by forming an adhesive layer between the substrate layer, the sealant layer, and other layers, and between the layers within the multilayers in the case where each layer is multilayer.

[0419] <Adhesive layer containing odor adsorbents>

[0420] The adhesive layer may contain an odor adsorbent.

[0421] The adhesive layer may also contain an adhesive suitable for use in combination with an odor adsorbent. Furthermore, the adhesive layer may include an odor-adsorbing adhesive layer containing an odor adsorbent and an adhesive, and an odor-non-adsorbing adhesive layer having an adhesive but not containing an odor adsorbent. In addition, it is preferable that the odor-non-adsorbing adhesive layer be in contact with one or both sides of the odor-adsorbing adhesive layer.

[0422] The content of the odor adsorbent in the adhesive layer is preferably 0.3 mass% or more and 50 mass% or less.

[0423] The content of hydrophobic zeolite in the adhesive layer can exhibit a sufficient odor adsorption effect if it is 0.05 mass% or more within the entire adhesive layer, but it is more preferable to have 0.3 mass% or more to obtain a good odor adsorption effect as a packaging material. Meanwhile, in order to obtain good film-forming properties when manufacturing a laminate and to achieve good adhesion, it is preferable that the content of hydrophobic zeolite be 50 mass% or less.

[0424] The content of the chemical adsorbent-supported inorganic porous body in the adhesive layer can exhibit a sufficient adsorption effect if it is contained in the entire adhesive layer at a rate of 0.05 mass% or more, but it is preferable that it be 0.3 mass% or more to obtain a good adsorption effect as a packaging material.

[0425] Meanwhile, in order to obtain good film formation properties and also achieve good adhesion when manufacturing a laminate, it is preferable that the content of the chemical adsorbent-supported inorganic porous body in the entire adhesive layer be 10 mass% or less.

[0426] The adhesive layer may be a layer formed by various methods such as EC (extrusion coating), dry lamination, non-adhesive lamination, and sand lamination.

[0427] In the case where the adhesive layer is a dry laminate adhesive layer or a non-adhesive laminate adhesive layer, the content of the odor adsorbent, hydrophobic zeolite, and chemical adsorbent-supported inorganic porous body is preferably within the above range.

[0428] In addition, when the adhesive layer is an EC (extrusion coating) adhesive layer or a sand laminate adhesive layer, for the reasons mentioned above, the content of the odor adsorbent is preferably 0.3 mass% or more and 15 mass% or less. Also, the content of the hydrophobic zeolite is preferably 0.3 mass% or more and 15 mass% or less, and the content of the chemical adsorbent-supported inorganic porous body is preferably 0.3 mass% or more and 10 mass% or less. When including both the hydrophobic zeolite and the chemical adsorbent-supported inorganic porous body, the content of the hydrophobic zeolite is preferably 0.3 mass% or more and 13 mass% or less, and the content of the chemical adsorbent-supported inorganic porous body is preferably 0.3 mass% or more and 10 mass% or less.

[0429] When forming the adhesive layer by extrusion coating or sand lamination, there are no specific limitations, but first, a resin composition for forming the adhesive layer is heated and melted, and then extruded in a curtain shape by expanding and stretching it in the required width direction using a T-die, and the molten material is flowed onto the adhesive target layer, and by clamping it with a rubber roll and a cooled metal roll, the formation of the adhesive layer and adhesion to the adhesive target layer and lamination are performed simultaneously.

[0430] In the case of forming an adhesive layer as a dry laminate, a resin composition dispersed or dissolved in a solvent is applied onto one layer and dried, and then another adhesive target layer is laminated and the resin composition is cured by aging at 30 to 120°C for several hours to several days.

[0431] Examples of the above-mentioned coating methods include roll coat, gravure roll coat, and kiss coat, and the coating amount is preferably about 0.1 to 10 g / m² (dry state). Good adhesion can be obtained by setting the coating amount of the resin composition to the above range.

[0432] In the case of forming an adhesive layer as a solvent-free laminate, a solvent-free resin composition is applied onto one layer, and after laminating another adhesive target layer, the resin composition is cured by aging at 30 to 120°C for several hours to several days.

[0433] Examples of the above-mentioned coating methods include roll coat, gravure roll coat, kiss coat, etc., and the coating amount is preferably about 0.1 to 15 g / m². Good adhesion can be obtained by setting the coating amount of the resin composition to the above range.

[0434] [Adhesive suitable for use in combination with odor adsorbents]

[0435] The adhesive suitable for use in combination with the odor adsorbent may be a thermosetting type, UV curing type, electron beam curing type, etc., and may be any form such as a water-based type, solution type, emulsion type, dispersion type, etc., and its properties may be any form such as a film / sheet type, powder type, solid type, etc., and furthermore, regarding the bonding mechanism, any form such as a chemical reaction type, solvent volatilization type, thermal melting type, or thermal pressing type is acceptable.

[0436] Specific examples of the above adhesive include, for instance, polyvinyl acetate-based adhesives such as polyvinyl acetate or vinyl acetate-ethylene copolymer; polyacrylic acid-based adhesives comprising copolymers of polyacrylic acid with polystyrene, polyester, polyvinyl acetate, etc.; cyanoacrylate-based adhesives; ethylene copolymer-based adhesives comprising copolymers of ethylene with monomers such as vinyl acetate, ethyl acrylate, acrylic acid, and methacrylic acid; cellulose-based adhesives; polyurethane-based adhesives; polyester-based adhesives; polyamide-based adhesives; polyimide-based adhesives; polyolefin-based adhesives such as LDPE; amino resin-based adhesives comprising urea resin or melamine resin, etc.; phenolic resin-based adhesives; epoxy-based adhesives; reactive (meth)acrylic-based adhesives; elastomer-based adhesives comprising chloroprene rubber, nitrile rubber, styrene-butadiene rubber, etc.; silicone-based adhesives; and inorganic adhesives comprising alkali metal silicates, low-melting point glass, etc. Furthermore, examples include the anchor coat system.

[0437] As anchor coat agents, for example, organic titanium-based, isocyanate-based, polyethyleneimine-based, acid-modified polyethylene-based, and polybutadiene-based anchor coat agents may be used.

[0438] Among these, the adhesive is preferably one or more selected from the group consisting of polyurethane resin, polyester resin, polyamide resin, and polyolefin resin.

[0439] Sealant layer

[0440] The sealant layer is a layer that imparts functions such as heat sealing, flexibility, and impact resistance to the laminate.

[0441] The sealant layer may consist of one layer or two or more layers. In the case of two or more layers, layers of the same composition or layers of different compositions may be used.

[0442] The sealant layer of the odor adsorbent of the present invention preferably contains thermoplastic resin C.

[0443] Additionally, the sealant layer may include an odor-adsorbing sealant layer and an odor-non-adsorbing sealant layer, and it is preferable that the odor-non-adsorbing sealant layer be in contact with one or both sides of the odor-adsorbing sealant layer.

[0444] The content of the odor adsorbent in the entire sealant layer is preferably 0.3 mass% or more and 15 mass% or less.

[0445] The content of hydrophobic zeolite in the entire sealant layer can exhibit a sufficient odor adsorption effect if it is 0.05 mass% or more, but to obtain a good odor adsorption effect as a packaging material, it is preferable that it be 0.1 mass% or more, and more preferable that it be 0.25 mass% or more. Meanwhile, to obtain good film formation properties when manufacturing a laminate, and to achieve good heat sealing properties, it is preferable that the content of hydrophobic zeolite be 13 mass% or less, and more preferable that it be 10 mass% or less.

[0446] The content of the chemical adsorbent-supported inorganic porous body within the entire sealant layer can exhibit a sufficient adsorption effect if it is contained in an amount of 0.05 mass% or more within the entire sealant layer, but in order to obtain a good adsorption effect as a packaging material, it is preferable that it be 0.1 mass% or more, and more preferable that it be 0.25 mass% or more.

[0447] Meanwhile, in order to obtain good film formation properties when manufacturing a laminate and to achieve good heat sealing properties, it is preferable that the content of the chemical adsorbent-supported inorganic porous body in the entire sealant layer be 10 mass% or less, and more preferable that it be 9 mass% or less.

[0448] The thickness of the sealant layer is preferably 5 to 500 μm, and more preferably 10 to 250 μm. If it is thinner than the above range, it is difficult to obtain sufficient heat seal strength, and if it is thicker than the above range, it tends to cause an increase in cost and the film becomes rigid, which can worsen workability.

[0449] [Thermoplastic Resin C]

[0450] In the present invention, the thermoplastic resin C has heat sealability that can be used in a sealant layer, and it is preferable that the melt flow rate is 0.2 g / 10 min or more and 10.0 g / 10 min or less, and more preferable that it is 0.2 g / 10 min or more and 9.5 g / 10 min or less. In addition, in this specification, MFR is a value measured by a method based on JIS K7210.

[0451] If the MFR is less than 0.2 g / min or greater than 10 g / min, it is difficult to be effective in terms of processing suitability.

[0452] Specific examples of thermoplastic resin C include, for instance, polyolefin resins such as polyethylene, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, metallocene polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-(meth)acrylate copolymer, ethylene-(meth)acrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polyethylene or polypropylene, and furthermore, modified polyolefin resins obtained by modifying polyolefin resins with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, etc., ternary copolymer resins of ethylene-(meth)acrylic acid ester-unsaturated carboxylic acid, cyclic polyolefin resins, cyclic olefin copolymers, polyethylene terephthalate (PET), polyacrylonitrile (PAN), etc. However, it is not limited to these.

[0453] Among the above, from the perspective of heat sealability, it is preferable to include a polyolefin resin, particularly low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE), and particularly LLDPE.

[0454] In addition, thermoplastic resin C may contain a small amount of additives such as antioxidants or anti-blocking agents, and may also incorporate known flexural modifiers, inorganic or organic additives as needed.

[0455] Furthermore, it is desirable that the thermoplastic resin C has excellent resistance to pinholes caused by bending when formed into a single film.

[0456] Since packaging materials may develop pinholes due to fatigue failure caused by localized, repetitive bending resulting from vibrations during the packaging process or transportation, pinhole resistance is particularly important for packaging materials used in applications such as food and medical supplies.

[0457] In the present invention, the pinhole resistance of the thermoplastic resin C is such that, for example, the number of pinholes generated after 5,000 cycles of gelboplex at 23°C in a 50 μm thick film comprising a thermoplastic resin C monolith is 0 or 1 or more and 160 or less.

[0458] If the number of pinholes in the sealant film falls within the above range, a packaging material capable of withstanding practical use can be produced for applications requiring pinhole resistance.

[0459] [Odor-adsorbing sealant layer]

[0460] The odor adsorption sealant layer in the present invention is a layer formed of a resin composition comprising thermoplastic resin C and an odor adsorbent.

[0461] In one embodiment of the present invention, the odor adsorption sealant layer is a single layer formed using a resin composition obtained by kneading an odor adsorbent and a thermoplastic resin C. Here, the odor adsorbent may be uniformly dispersed within the layer or dispersed with a concentration gradient.

[0462] For example, when forming the packaging, it may be dispersed with an increasing concentration gradient from the inner surface to the outer surface, and this configuration improves heat sealability. Conversely, when forming the packaging, it may be dispersed with a decreasing concentration gradient from the inner surface to the outer surface, and this configuration improves interlayer adhesion strength.

[0463] Furthermore, the odor adsorption sealant layer may be dispersed with a concentration gradient having a decreasing trend from the center in the thickness direction toward both surfaces, and this configuration improves heat sealability and interlayer adhesion strength.

[0464] In another embodiment, the odor adsorption sealant layer may be a multilayer structure in which two or more layers are laminated, and each layer may include a resin composition with a different type of thermoplastic resin C or a different type and content of odor adsorbent.

[0465] Furthermore, it is possible to include other components within a range that does not impair odor adsorption or heat sealing properties.

[0466] Although it is possible to form a film if the total thickness of the odor adsorption sealant layer is 5 μm or more, it is preferable to have a thickness of 10 μm to 200 μm to obtain good film formation, heat sealing properties, interlayer adhesion strength, and odor adsorption properties.

[0467] [Odor-non-absorbing sealant layer]

[0468] The odor-non-adsorbing sealant layer in the present invention is a layer containing thermoplastic resin C and not containing an odor adsorbent.

[0469] An odor-non-adsorbent sealant layer that does not contain an odor adsorbent has superior heat sealing properties compared to an odor-adsorbent sealant layer that contains an odor adsorbent. Due to this property, it is preferable to laminate an odor-non-adsorbent sealant layer on one or both sides of an odor-adsorbent sealant layer. This laminated configuration allows the odor-adsorbent sealant layer to be firmly bonded within the laminate or enables the laminates to be firmly heat-sealed to each other.

[0470] (Method for forming and laminating a sealant layer)

[0471] In the present invention, the method of forming and laminating the sealant layer is not particularly limited, and known or conventional methods of forming and laminating can be applied. For example, it can be formed by the inflation method, the casting method, or the extrusion method (extrusion method, co-extrusion method).

[0472] A pre-fabricated sealant layer may be laminated onto a multilayer structure through an adhesive layer by means of dry lamination, non-adhesive lamination, sand lamination, etc.

[0473] Alternatively, a resin composition forming a sealant layer can be heated and melted using an extrusion method on a multilayer surface, and then extruded in a curtain shape by expanding and stretching it in the required width direction using a T-die. The molten resin can then be poured onto a laminated surface and clamped with a rubber roll and a cooled metal roll to simultaneously form the sealant layer and bond and laminate it to the laminated surface. If necessary, bonding may be performed through an adhesive layer.

[0474] Here, in any of the above-mentioned film-forming and lamination methods, the sealant layer may be composed of a plurality of odor-adsorbing sealant layers or odor-non-adsorbing sealant layers, and the layers may be bonded together through an adhesive.

[0475] Odor-absorbing film for packaging materials

[0476] The odor adsorption laminate of the present invention can be used as an odor adsorption film for packaging materials.

[0477] Odor-absorbing packaging materials

[0478] An odor-adsorbing packaging material can be produced using the odor-adsorbing film for packaging materials of the present invention.

[0479] When producing a packaging pouch using the odor-adsorbing packaging material of the present invention, for example, the packaging material may be folded and bent so that the sides with good heat sealability face each other, or two sheets may be overlapped and the surrounding ends may be heat-sealed using a heat seal type such as a side seal type, a two-way seal type, a three-way seal type, a four-way seal type, an envelope attachment seal type, a fold attachment seal type (pillow seal type), a pleated attachment seal type, a flat bottom seal type, an angled bottom seal type, a gadget type, etc.

[0480] As a heat seal method, known methods such as bar seals, rotary roll seals, belt seals, impulse seals, high-frequency seals, and ultrasonic seals may be applied.

[0481] <BIB용 악취 흡착성 포장 재료>

[0482] The odor-adsorbing packaging material of the present invention can be used as an odor-adsorbing packaging material for BIBs.

[0483] In particular, it can be used as an odor-adsorbing liquid content packaging material for BIBs targeting liquid contents.

[0484] In the present invention, liquid contents include, for example, beverages, juices, intravenous fluids, seasoning liquids such as soy sauce and sauces, tsuyu, honey, seasonings, dressings, etc., and all other liquids.

[0485] Regarding Assignment 4

[0486] <Packaging, Liquid Content Packaging for BIB>

[0487] The packaging body of the present invention is composed of at least a double pocket portion and a contents extraction port comprising a resin molded article, for example, as shown in FIG. 16.

[0488] The double pocket portion is composed of an upper film and a lower film as shown in FIG. 17, and the contents extraction port is attached to the upper film.

[0489] Each of the upper film and the lower film comprises at least an outer layer film and an inner layer film, as shown in FIGS. 18 and 19, and the outer layer film and the inner layer film are only partially bonded to each other.

[0490] The partial bonding portion between the outer layer film and the inner layer film is preferably located at least at the periphery of the packaging, and may be a grid shape formed by continuous lines, a shape formed by discontinuous lines, or a dot shape.

[0491] The packaging of the present invention is used, for example, as a packaging for liquid contents for BIBs, and is provided for filling contents in a sealed state with a cap placed over the contents extraction port. That is, when used for normal purposes, the sealed packaging for liquid contents for BIBs is placed in a cardboard box and supplied to the user, but when used for aseptic filling, the sealed packaging for liquid contents for BIBs is supplied to the user after being sterilized with electron beams, gamma rays, or ethylene oxide gas.

[0492] Since the packaging body of the present invention undergoes fatigue failure due to localized repeated bending caused by vibration during the packaging process or transportation, or contact with the contents extraction port, and may generate pinholes that cause leakage of liquid contents when used as a packaging body for liquid contents in BIBs, pinhole resistance is particularly important for packaging materials used for purposes such as food and medical supplies.

[0493] [Method of manufacturing the packaging]

[0494] The packaging body of the present invention can be manufactured by folding and bending the packaging material so that the sealant layer of the upper film with the contents extraction opening attached and the sealant layer of the lower film face each other, as shown in FIG. 17, for example, and overlapping two sheets together, and then heat-sealing the surrounding ends using a heat-sealing type such as a side seal type, a two-way seal type, a three-way seal type, a four-way seal type, an envelope attachment seal type, a joint attachment seal type (pillow seal type), a pleated attachment seal type, a flat bottom seal type, an angled bottom seal type, a gadget type, etc.

[0495] As a heat seal method, known methods such as bar seals, rotary roll seals, belt seals, impulse seals, high-frequency seals, and ultrasonic seals may be applied.

[0496] As a method for attaching a content extraction port to an upper film, a hole is made at the attachment location of the content extraction port on the upper film, the content extraction port is inserted into the hole from the inside of the upper film, the inner surface of the upper film is heat-sealed to the outside of the flange of the content extraction port to fix it, and a cap is placed over the content extraction port to seal it.

[0497] <Contents Extraction Port>

[0498] The contents extraction port is an inlet / outlet for filling and / or extracting contents, and the filling and extraction of contents may be performed using one contents extraction port, or two or more may be provided to perform the filling and extraction of contents using separate contents extraction ports.

[0499] There are no specific restrictions on the attachment location of the contents extraction port, but it is preferable to attach it near the four sides of the packaging.

[0500] It is preferable that the contents extraction port contains a polyolefin resin.

[0501] Specific examples of polyolefin resins include polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), various ethylene copolymers, polypropylene resins, cyclic polyolefin resins, methylpentene polymers, acid-modified polyolefin resins, etc., but are not limited to these.

[0502] From the perspective of moldability, it is desirable that the melt flow rate of the polyolefin resin be 5 g / min or more and 100 g / min or less.

[0503] In addition, various plastic compounding agents or additives can be added to the contents extraction port for the purpose of improving or modifying processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, etc.

[0504] A content extraction port can be obtained by preparing a resin composition by mixing and kneading the various raw materials mentioned above in a known manner, and molding the resin composition in a known manner.

[0505] As the resin contained in the contents extraction port, the above-mentioned polyolefin resin is preferred, but is not limited thereto, and various thermoplastic resins may be contained within a range that does not cause adverse effects.

[0506] From the perspective of moldability, it is desirable that the melt flow rate of the contained thermoplastic resin be 5 g / min or more and 100 g / min or less.

[0507] <Layer composition of outer and inner film>

[0508] Each of the upper film and the lower film constituting the double pouch portion of the liquid contents packaging for BIB of the present invention comprises at least an outer layer film and an inner layer film, as shown in FIGS. 18 and 19, and the outer layer film and the inner layer film are only partially bonded to each other.

[0509] And, the outer layer film and the inner layer film are each films having a sealant layer containing at least low-release polyethylene.

[0510] And, the sealant layer of the inner film includes an odor adsorption layer.

[0511] The sealant layer of the inner film may be a layer containing only an odor adsorption layer as shown in FIG. 20, or a multilayer structure including an odor non-adsorption layer containing low-release polyethylene but not an odor adsorbent, as shown in FIG. 21 and FIG. 22, in order to improve seal strength and interlayer adhesion strength.

[0512] In addition, as shown in FIG. 23, the odor adsorption layer may have a multilayer structure in which the type of low-release polyethylene, the type and content of the odor adsorbent are the same or different.

[0513] In the packaging body of the present invention, the innermost layer in contact with the contents may be an odor-adsorbing layer or an odor-non-adsorbing layer. If the odor-non-adsorbing layer is the innermost layer, the seal strength of the packaging body can be improved, and if the odor-adsorbing layer is the innermost layer, the interlayer adhesion strength within the packaging body can be improved.

[0514] In addition, the outer layer film and the inner layer film, respectively, may include a substrate layer, a functional layer such as a reinforcing layer, an adhesive layer, etc., as shown in FIG. 24, in order to improve the strength of the film or to impart various functions, and it is particularly preferable that the outer layer film includes a substrate layer. The substrate layer, functional layer, and adhesive layer may be used by laminating known materials in a known manner.

[0515] Sealant layer of outer layer film and inner layer film

[0516] The sealant layer of the inner film includes an odor adsorption layer and may also include an odor non-adsorption layer.

[0517] The sealant layer of the outer film contains only an odor-non-adsorbent layer and does not contain an odor-adsorbent layer.

[0518] [Odor Adsorption Layer]

[0519] The odor adsorption layer in the present invention comprises a resin composition including low-release polyethylene and an odor adsorbent.

[0520] Furthermore, general-purpose polyethylene, polypropylene, methylpentene polymer, acid-modified polyolefin resin, and mixtures of their thermoplastic resins may be included within a range that does not impair the low leaching or heat sealing properties of the sealant film, but are not limited to these resins.

[0521] In one embodiment of the present invention, the odor adsorption layer is a single layer formed using a resin composition obtained by kneading an odor adsorbent and low-release polyethylene. Here, the odor adsorbent may be uniformly dispersed within the layer or dispersed with a concentration gradient.

[0522] For example, when forming the packaging, it may be dispersed with an increasing concentration gradient from the inner surface to the outer surface, and this configuration improves heat sealability. Conversely, when forming the packaging, it may be dispersed with a decreasing concentration gradient from the inner surface to the outer surface, and this configuration improves interlayer adhesion strength.

[0523] Furthermore, the odor adsorption layer may be dispersed with a concentration gradient having a decreasing trend from the center in the thickness direction toward both surfaces, and this configuration improves heat sealability and interlayer adhesion strength.

[0524] In another embodiment, the odor adsorption layer may be a multilayer structure in which two or more layers are stacked, wherein each layer may contain a resin composition having a different type of low-release polyethylene as the main component or a different type and content of odor adsorbent.

[0525] Although it is possible to form a film if the total thickness of the odor adsorption layer is 5 μm or more, it is preferable to have a thickness of 10 μm to 200 μm to obtain good film formation, heat sealing properties, interlayer adhesion strength, and odor adsorption properties.

[0526] The odor adsorbent comprises hydrophobic zeolite and, furthermore, may comprise an inorganic porous body supporting a chemical adsorbent.

[0527] Hydrophobic zeolites or inorganic porous materials supported by chemical adsorbents can be directly mixed and kneaded with low-leaching polyethylene, or it is also possible to produce a masterbatch by mixing hydrophobic zeolites or inorganic porous materials supported by chemical adsorbents with a thermoplastic resin at a high concentration and then melt-kneading, and then mixing and melt-kneading this with low-leaching polyethylene in proportions according to the target content using the so-called masterbatch method.

[0528] In the present invention, the amount of hydrophobic zeolite added is such that a sufficient odor adsorption effect can be achieved if it is contained in the entire sealant layer of the inner layer film at a concentration of 0.05 mass% or more; however, to obtain a good odor adsorption effect as a packaging material, it is preferable that the amount be 0.1 mass% or more, and more preferable that it be 0.25 mass% or more. Meanwhile, to obtain good film-forming properties when manufacturing a laminate, and to achieve good heat sealing properties, the content of hydrophobic zeolite is preferably 13 mass% or less, and more preferable that it be 10 mass% or less.

[0529] The content of the chemical adsorbent-supported inorganic porous body is such that it is possible to achieve a sufficient adsorption effect if it is contained in the entire sealant layer of the inner layer film at a level of 0.05 mass% or more, but to obtain a good adsorption effect as a packaging material, it is preferable that it be 0.1 mass% or more, and more preferable that it be 0.25 mass% or more.

[0530] Meanwhile, in order to obtain good film formation properties when manufacturing a laminate and to achieve good heat sealing properties, it is preferable that the content of the chemical adsorbent-supported inorganic porous body be 10 mass% or less in the entire sealant layer of the inner layer film, and more preferable that it be 9 mass% or less.

[0531] [Low-leaching polyethylene]

[0532] In the present invention, the sealant layer of the outer layer film and the inner layer film contains low-leaching polyethylene having heat sealing properties and a low amount of organic matter leaching.

[0533] By reducing the amount of organic matter leaching, the concentration of organic matter leaching into the liquid contents filled in the packaging of the present invention can be reduced, thereby suppressing changes in taste.

[0534] Here, the concentration of organic matter in the liquid contents is indicated in the present invention by the concentration of total organic carbon (TOC).

[0535] TOC represents the concentration of the total amount of oxidizable organic matter (organic carbon) in water as a carbon concentration. It is used as one of the representative water quality indicators and is standardized in standards such as JIS K0805 (Automatic Organic Carbon (TOC) Meter).

[0536] The concentration of leaching TOC contained in the film containing the above low-leaching polyethylene is 1.5 ppm or more and 250 ppm or less.

[0537] Here, the reason for measuring the concentration of leaching TOC regarding the low-leaching polyethylene used as a monomeric raw material in a film-formed state rather than in a raw material pellet state is that when the low-leaching polyethylene is formed into a film, such as for the formation of a sealant layer, various thermal histories may be applied, which can increase the amount of TOC leaching.

[0538] In the present invention, when 1 kg of distilled water is filled as a filling water and leached into a pouch packaging bag made of low-leaching polyethylene with a thickness of 15 cm × 44 cm × 50 μm, the increase concentration of TOC in the filling water is preferably 0.01 ppm or more and 1.5 ppm or less, more preferably 0.02 ppm or more and 1.45 ppm or less, and even more preferably 0.025 ppm or more and 1.4 ppm or less.

[0539] If the increase in TOC concentration in the filling water is greater than 1.5 ppm, it is difficult to suppress the change in taste of the filling water, and while the cost increases to obtain a value less than 0.01 ppm, the effect is limited. From the perspective of cost-effectiveness and performance compatibility, the above-mentioned range is desirable.

[0540] As a method for determining the specific increase in TOC concentration, for example, 1000 g of distilled water at 40°C to 80°C is filled into the pouch packaging bag described above as the filling water, and after storing it at 25°C to 50°C for several days to 4 weeks, the TOC concentration of the filling water is measured using a total organic carbon meter or HS-GC, and the TOC concentration of the distilled water is obtained by subtracting the blank.

[0541] In the present invention, a packaging material for a packaging body, an outer layer film, and an inner layer film are used to produce a packaging body of a pouch (15 cm × 44 cm), and 1000 g of water at 65°C (distilled water for high-speed liquid chromatography, Junseikagaku) ​​is filled to produce a packaging body liquid filler, and after storing at 35°C for 2 weeks, the increase in TOC concentration is determined by measuring the TOC concentration of the filled water using a TOC-L total organic carbon system manufactured by Shimadzu Seisakusho Inc. as a standard method.

[0542] Then, the concentration of leaching TOC contained in the sealant film is calculated from the increased TOC concentration of the obtained filling water and the mass parts of the filling water and sealant film.

[0543] Specific examples of low-solubility polyethylene include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, and mixtures of these resins, but are not limited to these resins.

[0544] To reduce the amount of organic matter leached from low-leaching polyethylene films, the following methods may be used, but are not limited to these.

[0545] When manufacturing polyethylene, it is effective to reduce the amount of unreacted raw materials, low molecular weight products, or by-products, or to remove polymerization catalysts. Specifically, methods include improving the purity of raw materials, precisely controlling conditions such as reaction temperature or pressure, removing unreacted raw materials, low molecular weight products, by-products, or polymerization catalysts through distillation or washing, or preventing oxidation caused by exposure to oxygen in the air at high temperatures.

[0546] When pelletizing manufactured polyethylene, methods such as limiting the use of lubricants, antioxidants, and other additives that increase the leaching amount of organic matter can be used.

[0547] When forming polyethylene into a film, methods such as limiting the use of lubricants, antioxidants, solvents, and other additives that increase the leaching amount of organic matter can be used to prevent oxidation caused by high temperatures.

[0548] In the present invention, the sealant layer has heat sealing properties and contains low-leaching polyethylene, so that the packaging material including the sealant layer has excellent heat sealing properties, has a low amount of organic matter leaching, and can reduce the increase in the concentration of TOC of the liquid contents within the packaging.

[0549] In addition, polyethylene is suitable in that it has the property of being resistant to sterilization and disinfection treatments such as UV and is difficult to decompose.

[0550] Among these low-leaching polyethylenes, LLDPE is preferred as the type, and furthermore, since LLDPE having C4, C6, and C8 side chains tends to reduce the leaching amount of organic matter, C4-LLDPE, C6-LLDPE, C8-LLDPE, etc. are more preferred.

[0551] Here, C4, C6, and C8 indicate that monomers with the specified number of carbon atoms are present in the side chains after partial copolymerization with LLDPE. For example, C4 represents a side chain with the structure of butene-1, C6 represents a side chain with the structure of hexene-1 or 4-methylpentene-1, and C8 represents a side chain with the structure of octene-1.

[0552] Alternatively, low-leaching polyethylene with a density of 0.90 g / cm³ or higher and 0.94 g / cm³ or lower is preferred, and low-leaching polyethylene with a density of 0.905 g / cm³ or higher and 0.933 g / cm³ or lower is more preferred. Low-leaching polyethylene with a density in this range tends to reduce the amount of organic matter leached out.

[0553] In addition, low-leaching polyethylene may contain small amounts of additives such as antioxidants or anti-blockers.

[0554] Furthermore, the low-solubility polyethylene in the present invention is preferably excellent in resistance to pinholes caused by bending when formed into a single film.

[0555] In the present invention, the pinhole resistance of the low-release polyethylene is such that, for example, the number of pinholes generated after 5,000 cycles of gelboplex at 23°C in a 50 μm thick film comprising a low-release polyethylene monomer is 0 or 1 or more and 160 or less.

[0556] If the number of pinholes in the sealant layer is within the above range, a packaging material capable of withstanding practical use can be produced for applications requiring pinhole resistance.

[0557] [Odor Adsorbent]

[0558] In the present invention, the odor adsorbent comprises a specific hydrophobic zeolite and further may comprise an inorganic porous body supporting a chemical adsorbent.

[0559] (Hypothecylinder zeolite)

[0560] In general, the hydrophobicity of a zeolite increases as the molar ratio of SiO2 / Al2O3 increases, and in the present invention, the hydrophobic zeolite contained in the odor adsorption layer preferably has a molar ratio of SiO2 / Al2O3 of 30 / 1 to 8000 / 1.

[0561] Hydrophobic zeolite does not lose its odor adsorption capacity even when the packaging body or packaging material is exposed to temperatures of 230°C or higher, and can exhibit a deodorizing effect through the adsorption of odor components.

[0562] Hydrophobic zeolite may have any external shape, such as spherical, rod-shaped, or elliptical, and any form, such as powder, lump, or particle; however, a powder form is preferred from the perspective of film-forming properties of the odor adsorption layer and uniform dispersion or mixing characteristics in polyethylene.

[0563] In the present invention, the average particle size of the hydrophobic zeolite can be appropriately selected to be any average particle size depending on the application, but it is preferable that the average particle size be 0.01 μm to 10 μm. Here, the average particle size is a value measured by dynamic light scattering.

[0564] When the average particle size is smaller than 0.01 μm, aggregation of hydrophobic zeolites is likely to occur, and dispersibility within low-release polyethylene tends to decrease. Additionally, when the average particle size is larger than 10 μm, the film-forming ability of the odor adsorption layer tends to be poor, making it difficult to add a large amount of hydrophobic zeolites. Furthermore, since the surface area decreases, there is a possibility that a sufficient deodorizing effect cannot be obtained.

[0565] Because hydrophobic zeolites are hydrophobic, they have difficulty adsorbing highly polar water molecules, but conversely, they have a high affinity for low-polarity odor molecules, hydrophobic gases, and lipophilic gases (including solvent gases), making it easy to adsorb them. Furthermore, due to the effect of alkali metals such as Ca, Na, and K, and alkaline earth metals present on the zeolite surface, the zeolite surface exhibits basicity, making it easy to adsorb acidic gases through neutralization reactions.

[0566] (Chemical adsorbent-supported inorganic porous material)

[0567] In the present invention, the chemical adsorbent-supported inorganic porous body is an inorganic porous body on which a chemical adsorbent is supported, and has the function of adsorbing odor substances generated from packaging during sterilization and disinfection treatments such as UV irradiation, γ-ray irradiation, EB irradiation, hot packs, and boils.

[0568] As a method of support, known or conventional support methods may be applied, for example, by impregnating an inorganic porous body with a solution containing a chemical adsorbent described below and drying it.

[0569] In the present invention, by including an odor adsorbent in which a chemical adsorbent is supported on an inorganic porous body in the odor adsorption layer, the adsorption capacity per unit mass of the chemical adsorbent can be significantly increased, thereby allowing for a reduction in the content of the chemical adsorbent-supported inorganic porous body within the odor adsorption layer. Furthermore, physical adsorption characteristics for the pore portions of the inorganic porous body can also be expected.

[0570] By reducing the content, high seal strength can be obtained, thereby maintaining the excellent heat sealability and film-forming properties required for a sealant layer.

[0571] In addition, the chemical adsorbent-supported inorganic porous body may have any external shape, such as spherical, rod-shaped, or elliptical, and any form, such as powder, lump, or particle; however, a powder form is preferred from the perspective of the film-forming properties of the odor adsorption layer and uniform dispersion or mixing characteristics in the thermoplastic resin.

[0572] The chemical adsorbent-supported inorganic porous body can be appropriately selected to have any average particle size depending on the application, but in the present invention, it is particularly preferable that the average particle size be 0.01 μm to 10 μm, more preferable that it be 0.1 μm to 8 μm, and even more preferable that it be 1 μm to 7 μm. Here, the average particle size is a value measured by the dynamic light scattering method.

[0573] When the average particle size is smaller than 0.01 μm, aggregation of the chemical adsorbent-supported inorganic porous material is likely to occur, and the dispersibility of the chemical adsorbent-supported inorganic porous material in low-leaching polyethylene tends to decrease.

[0574] In addition, when the average particle size is larger than 10 μm, the film-forming ability of the odor adsorption layer is poor, so it tends to be difficult to contain a large amount of chemical adsorbent-supported inorganic porous material, and there is a possibility that a sufficient adsorption effect cannot be obtained.

[0575] (Inorganic porous body)

[0576] Same as the case for Task 3 above.

[0577] (Chemical adsorbent)

[0578] In the present invention, a chemical adsorbent is a compound having a reactive functional group that reacts chemically with and binds to odorous substances generated by the decomposition of resins during sterilization or disinfection treatment, and can also be supported on the inorganic porous body described above. More specifically, it is a compound having a reactive functional group that binds to various aldehydes, ketones, carboxylic acids, etc. generated during sterilization or disinfection treatment such as UV irradiation, γ-ray irradiation, EB irradiation, or hot packs and boils.

[0579] Examples of such compounds include compounds having basic functional groups such as amino groups or hydroxyl groups, metal carbonates, metal bicarbonates, and compounds containing amide groups. Specific examples of each compound are given below, but are not limited thereto.

[0580] Examples of compounds containing amino groups include alkylamines, ethylenediamine, tetramethylenediamine, diethylenetriamine, triethylenetriamine, tetraethylenepentamine, piperazine, metaphenylenediamine, polyamines, etc.

[0581] Examples of compounds having a hydroxyl group include metal hydroxides such as sodium hydroxide, potassium hydroxide, magnesium hydroxide, and iron hydroxide.

[0582] Examples of metal carbonates include sodium carbonate and calcium carbonate.

[0583] Examples of metal bicarbonates include sodium bicarbonate.

[0584] Examples of compounds containing amide groups include 2-acrylamide-2-methylpropanesulfonic acid.

[0585] In the present invention, a compound having an amino group is preferred as a chemical adsorbent that exhibits particularly excellent adsorption effects.

[0586] The adsorption mechanism of the chemical adsorbent for substances to be adsorbed, such as leached organic matter or odor substances, will be explained in more detail using the specific examples of (a) and (b) in FIG. 3, but the present invention is not limited to these.

[0587] For example, when the substance to be adsorbed (malodorous substance) is an acidic malodorous substance, as shown in FIG. 3(a), a compound having, for example, a hydroxyl group can be selected as a chemical adsorbent and supported on an inorganic porous body to be used as a chemical adsorbent-supported inorganic porous body. Accordingly, the carboxyl group and the hydroxyl group undergo a chemical reaction and combine, and the substance to be adsorbed is adsorbed.

[0588] In addition, when the substance to be adsorbed is an aldehyde, as shown in FIG. 3(b), a compound having an amino group, for example, can be selected as a chemical adsorbent and supported on an inorganic porous body to be used as a chemical adsorbent-supported inorganic porous body. Accordingly, the aldehyde group and the amino group undergo a chemical reaction and combine, thereby adsorbing the substance to be adsorbed.

[0589] In this case, since it is chemical adsorption, the adsorbed target substance (odor substance) does not detach once adsorbed, and odor adsorption can be performed efficiently.

[0590] Furthermore, unlike physical adsorbents in which the target substance (malodorous substance) and water vapor are adsorbed at the same adsorption site, the chemical adsorbent in the present invention is resistant to the influence of various substances that reduce odor adsorption capacity, such as water vapor, because the target substance is bonded to a specific functional group of the chemical adsorbent.

[0591] <Odor-non-adsorbent layer>

[0592] The odor-non-adsorbent layer in the present invention is a layer containing low-release polyethylene and not containing an odor adsorbent.

[0593] Furthermore, high-yield polyethylene, polypropylene, methylpentene polymer, acid-modified polyolefin resin, and mixtures of these thermoplastic resins may be included within a range that does not impair the low-yield or heat-seal properties of the sealant film, but are not limited to these resins.

[0594] Method for manufacturing inner layer film

[0595] (Dispersion method of odor adsorbent)

[0596] As a method for mixing the odor adsorbent and the low-leaching polyethylene, known or conventional mixing methods may be applied.

[0597] It is possible to directly mix and knead the odor adsorbent with low-leaching polyethylene, or to produce a masterbatch by mixing the odor adsorbent with a high concentration of thermoplastic resin and then melt-kneading it, and then mixing and melt-kneading this with low-leaching polyethylene in proportions according to the target content using the so-called masterbatch method.

[0598] The content of hydrophobic zeolite in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0599] The content of the chemical adsorbent-supported inorganic porous body in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0600] In the case of the masterbatch method, even with a combination of an odor adsorbent prone to aggregation and low-release polyethylene, the odor adsorbent can be homogeneously dispersed within the low-release polyethylene.

[0601] At this time, the thermoplastic resin in the masterbatch may or may not be the same as the low-release polyethylene in the odor adsorption layer. Depending on the purpose, the same low-release polyethylene or other types of thermoplastic resins may be combined.

[0602] For example, if an odor adsorbent and low-release polyethylene are melt-mixed in advance, when the low-release polyethylene is mixed or melt-mixed again, homogeneous and good film-forming properties, heat sealing properties, interlayer adhesion strength, and odor adsorption properties can be obtained.

[0603] Thermoplastic resins other than low-release polyethylene in the odor adsorption layer may include general-purpose non-low-release polyethylene, polypropylene, methylpentene polymer, acid-modified polyolefin resin, polyolefin resins, and mixtures of these resins, but are not limited to these resins.

[0604] The above thermoplastic resin preferably has low leaching properties equivalent to those of the low leaching polyethylene in the present invention, but a general-purpose resin may be used within a range that does not significantly affect the amount of organic matter leached from the entire sealant layer.

[0605] (Preparation and stacking methods)

[0606] In the present invention, the film formation and lamination methods of each layer of the outer layer film or inner layer film are not particularly limited, and known or conventional film formation and lamination methods may be applied.

[0607] An odor adsorbent layer or an odor non-adsorbent layer may be laminated by extrusion coating on another layer through an adhesive layer, or, for example, a plurality of odor adsorbent layers and odor non-adsorbent layers may be formed by co-extrusion using an inflation method or a casting method.

[0608] In the case of lamination by extrusion coating, first, a resin composition forming an odor adsorption layer or a resin composition forming an odor non-adsorption layer is heated and melted, and then extruded in a curtain shape by expanding and stretching it in the required width direction using a T-die, and the molten resin is flowed onto the surface to be laminated, and by clamping it with a rubber roll and a cooled metal roll, the formation of the odor adsorption layer or the odor non-adsorption layer, as well as adhesion to and lamination to the surface to be laminated are performed simultaneously.

[0609] In the case of lamination by extrusion coating, the melt flow rate (MFR) of the low-release polyethylene included in the odor adsorption layer or the thermoplastic resin included in the odor non-adsorption layer is preferably 0.2 to 50 g / 10 min, and more preferably 0.5 to 30 g / 10 min. In addition, in this specification, MFR is a value measured by a method in accordance with JIS K7210.

[0610] If the MFR is less than 0.2 g / min or greater than 50 g / min, it is difficult to be effective in terms of processing suitability.

[0611] When using the inflation method, the melt flow rate (MFR) of the low-release polyethylene included in the odor adsorption layer or the thermoplastic resin included in the odor non-adsorption layer is preferably 0.2 to 10.0 g / 10 min, and more preferably 0.2 to 9.5 g / 10 min.

[0612] If the MFR is less than 0.2 g / 10 min or greater than 10.0 g / 10 min, it tends to be inferior in terms of processing suitability.

[0613] Alternatively, the pre-fabricated odor adsorbent layer and odor non-adsorbent layer may be laminated through an adhesive layer by dry lamination, non-adsorbent lamination, sand lamination, etc.

[0614] Method for manufacturing the outer layer film

[0615] The outer layer film can be manufactured by operating it in the same way as the inner layer film, except that it does not disperse the odor adsorbent.

[0616] <Adhesive layer>

[0617] In the present invention, it is also possible to laminate by forming an adhesive layer between each layer, such as between each layer within the sealant layer or between the sealant layer and the substrate layer.

[0618] The adhesive layer may include an adhesive or any anchor coat agent.

[0619] The adhesive may be a heat-curing type, UV-curing type, electron beam-curing type, etc., and may be in any form such as a water-based type, solution type, emulsion type, dispersion type, etc., and its properties may be in any form such as a film / sheet type, powder type, solid type, etc. Furthermore, regarding the bonding mechanism, it may be in any form such as a chemical reaction type, solvent volatilization type, heat melting type, heat pressing type, etc.

[0620] In addition, the adhesive layer may be a layer including an EC (extrusion coating) layer, an adhesive for dry lamination, an adhesive for non-adhesive lamination, etc.

[0621] Components forming such an adhesive layer include polyvinyl acetate-based adhesives such as polyvinyl acetate or vinyl acetate-ethylene copolymer; polyacrylic acid-based adhesives comprising copolymers of polyacrylic acid with polystyrene, polyester, polyvinyl acetate, etc.; cyanoacrylate-based adhesives; ethylene copolymer-based adhesives comprising copolymers of ethylene with monomers such as vinyl acetate, ethyl acrylate, acrylic acid, and methacrylic acid; cellulose-based adhesives; polyurethane-based adhesives; polyester-based adhesives; polyamide-based adhesives; polyimide-based adhesives; polyolefin-based adhesives such as LDPE; amino resin-based adhesives comprising urea resin or melamine resin, etc.; phenolic resin-based adhesives; epoxy-based adhesives; reactive (meth)acrylic-based adhesives; elastomer-based adhesives comprising chloroprene rubber, nitrile rubber, styrene-butadiene rubber, etc.; silicone-based adhesives; and inorganic adhesives comprising alkali metal silicates, low-melting point glass, etc. there is.

[0622] As anchor coat agents, for example, organic titanium-based, isocyanate-based, polyethyleneimine-based, acid-modified polyethylene-based, and polybutadiene-based anchor coat agents may be used.

[0623] When laminating an adhesive layer with an extrusion coating, it is not particularly limited, but can be formed by extrusion coating an adhesive onto the adhesive target layer.

[0624] In extrusion coating, first, the adhesive is heated and melted, then expanded and stretched in the required width direction using a T-die and extruded in a curtain shape, the molten material is flowed onto the target layer for adhesion, and by clamping it with a rubber roll and a cooled metal roll, the formation of the adhesive layer and adhesion and lamination to the target layer are performed simultaneously.

[0625] When using a dry laminate adhesive as the adhesive layer, the adhesive dispersed or dissolved in a solvent is applied onto one layer and dried, and then another adhesive target layer is laminated and the adhesive is cured by aging at 30 to 120°C for several hours to several days.

[0626] When using a non-removable adhesive for laminates, the adhesive itself is applied onto a layer without being dispersed or dissolved in a solvent and dried, and then another layer to be bonded is laminated, and the adhesive is cured by aging at 30 to 120°C for several hours to several days.

[0627] The adhesive layer is formed by applying the adhesive, for example, as a roll coat, gravure roll coat, or kiss coat, and the coating amount is preferably about 0.1 to 10 g / m² (dry state). Good adhesion can be obtained by applying the adhesive coating amount within the above range.

[0628] When laminating by sand lamination, any resin that can be applied by heating and melting with an extruder can be used for the adhesive layer. Specifically, a thermoplastic resin used for the aforementioned odor-non-adsorbent layer can be preferably used.

[0629] <BIB용 액체 내용물용 포장 재료>

[0630] The packaging material for liquid contents for BIB according to the present invention is a packaging material for producing an upper film and a lower film of a pocket portion of a liquid contents packaging body for BIB according to the present invention, and comprises at least an outer layer film and an inner layer film, wherein the outer layer film and the inner layer film are only partially bonded to each other as described above.

[0631] <Liquid Contents>

[0632] In the present invention, liquid contents refer to all liquids such as beverages, juices, intravenous fluids, soy sauce, sauces, seasoning liquids, tsuyu, honey, seasonings, dressings, etc.

[0633] Regarding Assignment 5

[0634] <Packaging, Liquid Content Packaging for BIB>

[0635] Same as the case for Task 4 above.

[0636] [Method of manufacturing the packaging]

[0637] Same as the case for Task 4 above.

[0638] <Contents Extraction Port>

[0639] The contents extraction port is an inlet / outlet for filling and / or extracting contents, and the filling and extraction of contents may be performed using one contents extraction port, or two or more may be provided to perform the filling and extraction of contents using separate contents extraction ports.

[0640] There are no specific restrictions on the attachment location of the contents extraction port, but it is preferable to attach it near the four sides of the packaging.

[0641] The contents extraction port contains a polyolefin resin and a hydrophobic zeolite. Furthermore, it may contain an inorganic porous body supported by a chemical adsorbent.

[0642] Specific examples of polyolefin resins include polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), various ethylene copolymers, polypropylene resins, cyclic polyolefin resins, methylpentene polymers, acid-modified polyolefin resins, etc., but are not limited to these.

[0643] From the perspective of moldability, it is desirable that the melt flow rate of the polyolefin resin be 5 g / min or more and 100 g / min or less.

[0644] In addition, various plastic compounding agents or additives can be added to the contents extraction port for the purpose of improving or modifying processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, etc.

[0645] A content extraction port can be obtained by preparing a resin composition by mixing and kneading the various raw materials mentioned above in a known manner, and molding the resin composition in a known manner.

[0646] As a method for mixing a hydrophobic zeolite or an inorganic porous body supported by a chemical adsorbent with a polyolefin-based resin, known or conventional mixing methods may be applied.

[0647] It is possible to directly mix and knead hydrophobic zeolites or inorganic porous bodies supported by chemical adsorbents with polyolefin resins, or to produce a masterbatch by mixing hydrophobic zeolites or inorganic porous bodies supported by chemical adsorbents with a high concentration of thermoplastic resin and then melt-kneading, and then mixing and melt-kneading this with polyolefin resins in proportions according to the target content using the so-called masterbatch method.

[0648] It is preferable that the content of hydrophobic zeolite in the total contents extraction area be 0.1 mass% or more and 13 mass% or less.

[0649] It is preferable that the content of the chemical adsorbent-supported inorganic porous body within the total contents extraction port be 0.1 mass% or more and 10 mass% or less.

[0650] If the amount is less than the above range, it is difficult to achieve a sufficient odor adsorption effect, and if the amount is more than the above range, the moldability of the contents extraction port is likely to deteriorate.

[0651] The content of hydrophobic zeolite in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0652] The content of the chemical adsorbent-supported inorganic porous body in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0653] In the case of the master batch method, even in the combination of a hydrophobic zeolite or an inorganic porous body supported by a chemical adsorbent that is prone to aggregation and a polyolefin resin, the hydrophobic zeolite or the inorganic porous body supported by a chemical adsorbent can be homogeneously dispersed within the polyolefin resin.

[0654] As the thermoplastic resin used in the masterbatch, the above-mentioned polyolefin-based resin is preferred, but is not limited thereto, and various thermoplastic resins can be used within a range that does not cause adverse effects.

[0655] Specific thermoplastic resins include, but are not limited to, polyolefin resins, polystyrene resins, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), poly(meth)acrylic resins, polyester resins, polyamide resins, polyurethane resins, acetal resins, and cellulose resins.

[0656] Among the resins mentioned above, it is preferable to include a polyolefin resin or a polyester resin with low gas permeability.

[0657] Specific examples of polyolefin resins include polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), various ethylene copolymers such as ethylene-vinyl alcohol copolymer resins, polypropylene resins, cyclic polyolefin resins, methylpentene polymers, acid-modified polyolefin resins, etc., but are not limited to these.

[0658] Examples of polyester resins include polycarbonate resins, polyethylene terephthalate, and polyethylene naphthalate, but are not limited to these.

[0659] From the perspective of moldability, it is desirable that the melt flow rate of the thermoplastic resin used in the masterbatch be 5 g / min or more and 100 g / min or less.

[0660] <Layer composition of outer and inner film>

[0661] Each of the upper film and the lower film constituting the double pouch portion of the liquid contents packaging for BIB of the present invention comprises at least an outer layer film and an inner layer film, as shown in FIGS. 18 and 19, and the outer layer film and the inner layer film are only partially bonded to each other.

[0662] And, the outer layer film and the inner layer film are each films having a sealant layer including at least an odor adsorption layer.

[0663] The sealant layer may be a layer containing only an odor adsorption layer as shown in FIG. 20, or a multilayer structure including an odor non-adsorption layer containing low-release polyethylene but not an odor adsorbent, as shown in FIG. 21 and FIG. 22, in order to improve seal strength and interlayer adhesion strength.

[0664] In addition, as shown in FIG. 23, the odor adsorption layer may have a multilayer structure in which the type of low-release polyethylene, the type and content of the odor adsorbent are the same or different.

[0665] In the liquid contents packaging body for BIB according to the present invention, the innermost layer in contact with the liquid contents may be an odor-adsorbing layer or an odor-non-adsorbing layer. If the odor-non-adsorbing layer is the innermost layer, the seal strength of the packaging body can be improved, and if the odor-adsorbing layer is the innermost layer, the interlayer adhesion strength within the packaging body can be improved.

[0666] In addition, the outer layer film and the inner layer film may each include a substrate layer, a functional layer such as a reinforcing layer, an adhesive layer, etc., as shown in FIG. 24, in order to improve the strength of the film or to impart various functions, and it is particularly preferable that the outer layer film includes a substrate layer. The substrate layer, functional layer, and adhesive layer may be used by laminating known materials in a known manner.

[0667] Sealant layer of outer layer film and inner layer film

[0668] [Odor Adsorption Layer]

[0669] Same as the case for Task 4 above.

[0670] [Low-leaching polyethylene]

[0671] In the present invention, the sealant layer contains low-leaching polyethylene having heat sealing properties and a low leaching amount of organic matter.

[0672] By reducing the amount of organic matter leaching, the concentration of organic matter leaching into the liquid contents filled in the liquid contents packaging body for BIB of the present invention can be reduced, thereby suppressing changes in taste.

[0673] Here, the concentration of organic matter in the liquid contents is indicated in the present invention by the concentration of total organic carbon (TOC).

[0674] TOC represents the concentration of the total amount of oxidizable organic matter (organic carbon) in water as a carbon concentration. It is used as one of the representative water quality indicators and is standardized in standards such as JIS K0805 (Automatic Organic Carbon (TOC) Meter).

[0675] The concentration of leaching TOC contained in the film containing the above low-leaching polyethylene is 1.5 ppm or more and 250 ppm or less.

[0676] Here, the reason for measuring the concentration of leaching TOC regarding the low-leaching polyethylene as a monomeric raw material in a film-formed state rather than in a state such as raw material pellets is that when low-leaching polyethylene is formed into a film, such as for the formation of a sealant layer, various thermal histories may be applied, which can increase the amount of TOC leaching.

[0677] In the present invention, when 1 kg of distilled water is filled as a filling water and leached into a pouch packaging bag made of low-leaching polyethylene with a thickness of 15 cm × 44 cm × 50 μm, the increase concentration of TOC in the filling water is preferably 0.01 ppm or more and 1.5 ppm or less, more preferably 0.02 ppm or more and 1.45 ppm or less, and even more preferably 0.025 ppm or more and 1.4 ppm or less.

[0678] If the increase in TOC concentration in the filling water is greater than 1.5 ppm, it is difficult to suppress the change in taste of the filling water, and while the cost increases to obtain a value less than 0.01 ppm, the effect is limited. From the perspective of cost-effectiveness and performance compatibility, the above-mentioned range is desirable.

[0679] As a method for determining the specific increase in TOC concentration, for example, 1000 g of distilled water at 40°C to 80°C is filled into the pouch packaging bag described above as the filling water, and after storing it at 25°C to 50°C for several days to 4 weeks, the TOC concentration of the filling water is measured using a total organic carbon meter or HS-GC, and the TOC concentration of the distilled water is obtained by subtracting the blank.

[0680] In the present invention, a packaging material for a liquid contents packaging for a BIB, an outer layer film, and an inner layer film are used to produce a packaging of a pouch (15 cm × 44 cm), and 1000 g of water at 65°C (distilled water for high-speed liquid chromatography, Junseikagaku) ​​is filled to produce a packaging liquid filling, and after storing at 35°C for 2 weeks, the increase in TOC concentration is determined by measuring the TOC concentration of the filling water using a TOC-L total organic carbon system manufactured by Shimadzu Seisakusho Inc. as a standard method.

[0681] Then, the concentration of leaching TOC contained in the sealant film is calculated from the increased TOC concentration of the obtained filling water and the mass parts of the filling water and sealant film.

[0682] Specific examples of low-solubility polyethylene include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, and mixtures of these resins, but are not limited to these resins.

[0683] To reduce the amount of organic matter leached from low-leaching polyethylene films, the following methods may be used, but are not limited to these.

[0684] When manufacturing polyethylene, it is effective to reduce the amount of unreacted raw materials, low molecular weight products, or by-products, or to remove polymerization catalysts. Specifically, methods include improving the purity of raw materials, precisely controlling conditions such as reaction temperature or pressure, removing unreacted raw materials, low molecular weight products, by-products, or polymerization catalysts through distillation or washing, or preventing oxidation caused by exposure to oxygen in the air at high temperatures.

[0685] When pelletizing manufactured polyethylene, methods such as limiting the use of lubricants, antioxidants, and other additives that increase the leaching amount of organic matter can be used.

[0686] When forming polyethylene into a film, methods such as limiting the use of lubricants, antioxidants, solvents, and other additives that increase the leaching amount of organic matter can be used to prevent oxidation caused by high temperatures.

[0687] In the present invention, the sealant layer has heat sealing properties and contains low-leaching polyethylene, so that the packaging material including the sealant layer has excellent heat sealing properties, has a low amount of organic matter leaching, and can reduce the increase in the concentration of TOC of the liquid contents within the packaging.

[0688] In addition, polyethylene is suitable because it has the property of being resistant to sterilization and disinfection treatments such as UV and is difficult to decompose.

[0689] Among these low-leaching polyethylenes, LLDPE is preferred as a type, and furthermore, since LLDPE having C4, C6, or C8 side chains tends to reduce the leaching amount of organic matter, C4-LLDPE, C6-LLDPE, C8-LLDPE, etc. are more preferred.

[0690] Here, C4, C6, and C8 indicate that monomers with the specified number of carbon atoms are present in the side chains after partial copolymerization with LLDPE. For example, C4 represents a side chain with the structure of butene-1, C6 represents a side chain with the structure of hexene-1 or 4-methylpentene-1, and C8 represents a side chain with the structure of octene-1.

[0691] Alternatively, low-leaching polyethylene with a density of 0.90 g / cm³ or higher and 0.94 g / cm³ or lower is preferred, and low-leaching polyethylene with a density of 0.905 g / cm³ or higher and 0.933 g / cm³ or lower is more preferred. Low-leaching polyethylene with a density in this range tends to reduce the amount of organic matter leached out.

[0692] In addition, low-leaching polyethylene may contain small amounts of additives such as antioxidants or anti-blockers.

[0693] Furthermore, the low-solubility polyethylene in the present invention is preferably excellent in resistance to pinholes caused by bending when formed into a single film.

[0694] In the present invention, the pinhole resistance of the low-release polyethylene is such that, for example, the number of pinholes generated after 5,000 cycles of gelboplex at 23°C in a 50 μm thick film comprising a low-release polyethylene monomer is 0 or 1 or more and 160 or less.

[0695] If the number of pinholes in the sealant layer is within the above range, a packaging material capable of withstanding practical use can be produced for applications requiring pinhole resistance.

[0696] [Odor Adsorbent]

[0697] Same as the case for Task 4 above.

[0698] <Odor-non-adsorbent layer>

[0699] Same as the case for Task 4 above.

[0700] Method for manufacturing outer layer film or inner layer film

[0701] (Dispersion method of odor adsorbent)

[0702] As a method for mixing the odor adsorbent and the low-leaching polyethylene, known or conventional mixing methods may be applied.

[0703] It is possible to directly mix and knead the odor adsorbent with low-leaching polyethylene, or to produce a masterbatch by mixing the odor adsorbent with a high concentration of thermoplastic resin and then melt-kneading it, and then mixing and melt-kneading this with low-leaching polyethylene in proportions according to the target content using the so-called masterbatch method.

[0704] The content of hydrophobic zeolite in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0705] The content of the chemical adsorbent-supported inorganic porous body in the master batch is preferably 0.5 mass% or more and 40 mass% or less, and more preferably 1 mass% or more and 20 mass% or less.

[0706] In the case of the master batch method, even with a combination of an odor adsorbent prone to aggregation and low-release polyethylene, the odor adsorbent can be homogeneously dispersed within the low-release polyethylene.

[0707] At this time, the thermoplastic resin in the masterbatch may or may not be the same as the low-release polyethylene in the odor adsorption layer. Depending on the purpose, the same low-release polyethylene or other types of thermoplastic resins may be combined.

[0708] For example, if an odor adsorbent and low-release polyethylene are melt-mixed in advance, when the low-release polyethylene is mixed or melt-mixed again, homogeneous and good film-forming properties, heat sealing properties, interlayer adhesion strength, and odor adsorption properties can be obtained.

[0709] Thermoplastic resins other than low-release polyethylene in the odor adsorption layer may include general-purpose non-low-release polyethylene, polypropylene, methylpentene polymer, acid-modified polyolefin resin, polyolefin resins, and mixtures of these resins, but are not limited to these resins.

[0710] The above thermoplastic resin preferably has low leaching properties equivalent to those of the low leaching polyethylene in the present invention, but a general-purpose resin may be used within a range that does not significantly affect the amount of organic matter leached from the entire sealant layer.

[0711] (Preparation and stacking methods)

[0712] In the present invention, the film formation and lamination methods of each layer of the outer layer film or inner layer film are not particularly limited, and known or conventional film formation and lamination methods may be applied.

[0713] An odor adsorbent layer or an odor non-adsorbent layer may be laminated by extrusion coating on another layer through an adhesive layer, or, for example, a plurality of odor adsorbent layers and odor non-adsorbent layers may be formed by co-extrusion using an inflation method or a casting method.

[0714] In the case of lamination by extrusion coating, first, a resin composition forming an odor adsorption layer or a resin composition forming an odor non-adsorption layer is heated and melted, and then extruded in a curtain shape by expanding and stretching it in the required width direction using a T-die, and the molten resin is flowed onto the surface to be laminated, and by clamping it with a rubber roll and a cooled metal roll, the formation of the odor adsorption layer or the odor non-adsorption layer, as well as adhesion to and lamination to the surface to be laminated are performed simultaneously.

[0715] In the case of lamination by extrusion coating, the melt flow rate (MFR) of the low-leaching polyethylene included in the odor adsorption layer or the thermoplastic resin included in the odor non-adsorption layer is preferably 0.2 to 50 g / 10 min, and more preferably 0.5 to 30 g / 10 min. In addition, in this specification, MFR is a value measured by a method in accordance with JIS K7210.

[0716] If the MFR is less than 0.2 g / min or greater than 50 g / min, it is difficult to be effective in terms of processing suitability.

[0717] When using the inflation method, the melt flow rate (MFR) of the low-release polyethylene included in the odor adsorption layer or the thermoplastic resin included in the odor non-adsorption layer is preferably 0.2 to 10.0 g / 10 min, and more preferably 0.2 to 9.5 g / 10 min.

[0718] If the MFR is less than 0.2 g / 10 min or greater than 10.0 g / 10 min, it tends to be inferior in terms of processing suitability.

[0719] Alternatively, the pre-fabricated odor adsorbent layer and odor non-adsorbent layer may be laminated through an adhesive layer by dry lamination, non-adsorbent lamination, sand lamination, etc.

[0720] <Adhesive layer>

[0721] Same as the case for Task 4 above.

[0722] <BIB용 액체 내용물용 포장 재료>

[0723] Same as the case for Task 4 above.

[0724] <Liquid Contents>

[0725] Same as the case for Task 4 above.

[0726] Examples

[0727] Regarding Assignment 1

[0728] Ingredients

[0729] The details of the raw materials used in the examples are as follows.

[0730] [Thermoplastic resin A of odor-adsorbing molded product]

[0731] [Table 1]

[0732]

[0733] [Hypothecylinder Zeolite]

[0734] · Mizukasibus EX-122: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / AL2O3 molar ratio = 32 / 1, average particle size = 2.5–5.5 μm.

[0735] · Silton MT400: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / AL2O3 molar ratio = 400 / 1, average particle size = 5–7 µm.

[0736] · Silton MT-8000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / AL2O3 molar ratio = 8000 / 1, average particle size = 0.8 µm.

[0737] [Hydrophilic Zeolite]

[0738] · Mizuka Shibs Y-420: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / AL2O3 molar ratio = 5 / 1, average particle size = 5 µm.

[0739] [Chemical Adsorbent-Supported Inorganic Porous Material]

[0740] · Kesmon NS-241: Manufactured by Doagosei Co., Ltd., inorganic porous body supporting an amino group-containing compound. Average particle size 3.5 μm.

[0741] Preparation of Masterbatch

[0742] The master batch was produced by adjusting as follows.

[0743] [Adjustment of Master Batch 1]

[0744] Novatech UF370 as thermoplastic resin A and Mizukasivs EX-122 as hydrophobic zeolite were melt-blended in the following ratios to obtain Master Batch 1 (MB1).

[0745] Novatech UF370 90 mass parts

[0746] Mizukasivus EX-122 10 Mass Part

[0747] (Adjustment of Master Batch 2–5)

[0748] According to the formulation of Table 2, thermoplastic resin B and a hydrophobic zeolite or chemical adsorbent-supported inorganic porous body were melt-blended in the same manner as Master Batch 1 to obtain Master Batches 2 to 5 (MB2 to 5).

[0749] [Table 2]

[0750]

[0751] [Example 1]

[0752] A resin composition was obtained by dry blending the master batch 1 obtained above and Novatech UF370 in the following ratio.

[0753] Master Batch 1 10 parts by mass

[0754] Novatech UF370 90 mass parts

[0755] Then, the resin composition obtained above was used to produce a molded product of a contents extraction port by injection molding at 200°C.

[0756] [Examples 2–10]

[0757] According to the description in Table 3, a master batch and thermoplastic resin A were selected, and a resin composition was obtained by operating in the same manner as in Example 1, and a molded product of a contents extraction port was produced.

[0758] [Comparative Example 1]

[0759] A molded product with a contents extraction port was produced by using only Novatech UF370 without mixing the master batch, and operating it in the same manner as in Example 1.

[0760] <Evaluation>

[0761] [Sensory Evaluation]

[0762] Each of the PET film (manufactured by Toyobo Co., Ltd., Espet T4102, thickness 12 μm), aluminum foil (manufactured by Toyo Aluminum Co., Ltd., thickness 12 μm), and LLDPE film (manufactured by Toyobo Co., Ltd., Leaks L6100, thickness 50 μm) was dry laminated by applying an adhesive (Rock Paint, RU004 / H1, dry coating amount 3.5 g / m²) and drying at 70°C to obtain a multilayer film of PET 12 μm / adhesive layer / Al foil 7 μm / adhesive layer / LLDPE 50 μm. A pouch (13 cm × 17 cm) was manufactured using this multilayer film, and UV irradiation sterilization treatment was performed on the inner surface of each laminate beforehand.

[0763] Then, when filling each obtained pouch with 100 g of water at 65°C (manufactured by Suntory Co., Ltd., Alpine Natural Water) as a hot pack, one molded product of the contents extraction port obtained in the example and comparative example was also filled to produce a packaging liquid filler, and a sensory evaluation was conducted regarding the change in taste after storing at 10°C for one week.

[0764] The evaluation indicators are as follows. There were 5 participants in the sensory evaluation experiment, and the average was calculated and used as the evaluation result.

[0765] 1: Has a strong hobby

[0766] 2: The hobby has been somewhat alleviated.

[0767] 3: Hobbies have been significantly reduced.

[0768] 4: Equivalent to water before charging

[0769] [Table 3]

[0770]

[0771] <Summary of Results>

[0772] In all examples containing thermoplastic resin A and an odor adsorbent, good moldability and taste change results were obtained, but in Comparative Example 1, which does not contain an odor adsorbent, good taste change results were not obtained.

[0773] Regarding Assignment 2

[0774] <Example>

[0775] The details of the raw materials used in the examples are as follows.

[0776] [Low-solubility polyethylene and general-purpose polyethylene for inner and outer layer films]

[0777] The polyethylene listed in Table 1 and the following polyethylene were used.

[0778] ·UMERIT0520F: Manufactured by Ube Kosan Co., Ltd., LLDPE.

[0779] · Novatech LC520: Manufactured by Nippon Polyethylene Co., Ltd., LDPE resin.

[0780] [Table 1]

[0781]

[0782] [Resin and molding for contents extraction port]

[0783] Using the low-release polyethylene for resin molded articles listed in the table, contents extraction holes A to E were obtained by injection molding at 200°C.

[0784] [Table 2]

[0785]

[0786] [Odor Adsorbent]

[0787] (Chemical adsorbent-supported inorganic porous material)

[0788] · Kesmon NS-241: Manufactured by Doagosei Co., Ltd., inorganic porous body supporting an amino group-containing compound. Average particle size 3.5 μm.

[0789] (Hypothecylinder zeolite)

[0790] · Mizukasibus EX-122: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / Al2O3 molar ratio = 32 / 1, average particle size 2.5–5.5 μm.

[0791] · Silton MT400: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 400 / 1, average particle size 5–7 µm.

[0792] · Silton MT2000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 2000 / 1, average particle size 2–4 µm.

[0793] · Silton MT-8000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 8000 / 1, average particle size 0.8 µm.

[0794] (Hydrophilic zeolite)

[0795] · Mizuka Shibs Y-420: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / Al2O3 molar ratio = 5 / 1, average particle size 5 µm.

[0796] [Insulated Film]

[0797] Bonyl RX: Manufactured by Kojin Film & Chemicals Co., Ltd., biaxially stretched nylon film. 15 µm thickness.

[0798] IB-ONY: Manufactured by Dainippon Insatsu Co., Ltd., gas barrier biaxially stretched nylon film. 15 µm thickness.

[0799] [etc]

[0800] · EMB-21: Manufactured by Sumitomo Chemicals, Inc., anti-blocking agent.

[0801] · PEX ABT-16: Nippon Polyethylene Co., Ltd., anti-blocking agent.

[0802] ·EMB-10: Sumitomo Chemical Co., Ltd., Slipper.

[0803] [Preparation of Masterbatch]

[0804] The MB (master batch) of the outer layer film and the inner layer film was produced by adjusting them as follows.

[0805] (Adjustment of MB1)

[0806] Master Batch 1 (MB1) was obtained by melt blending Ultjex 1520L, an LLDPE of low-leach polyethylene, and Mitsucasivs EX-122, a hydrophobic zeolite, in the following ratio.

[0807] Ultjex 1520L 90 mass parts

[0808] Mizukasivus EX-122 10 Mass Part

[0809] (Adjustment of MB2~13)

[0810] According to the formulations of Tables 3 and 4, the raw materials were melt-blended in the same manner as MB1 to obtain master batches 2 to 13 (MB2 to 13).

[0811] [Table 3]

[0812]

[0813] [Production of outer layer film]

[0814] Outer layer films A to I listed in Table 4 were produced.

[0815] (Fabrication of outer layer film A)

[0816] UltJex 1520L was inflation-deposited at 160°C to produce an 80 μm sealant film, which was used as outer layer film A. The layer composition and evaluation results are shown in Table 4.

[0817] (Fabrication of outer layer film B)

[0818] First, UltJex 1520L was laminated by inflation film formation at 160°C to produce a 40 μm sealant film.

[0819] Next, an outer layer film B was obtained by laminating the above-mentioned sealant film with the biaxially stretched nylon film Bonyl RX using Novatech LC520 as an adhesive layer via an extrusion coating method at 320°C. The layer composition and evaluation results are shown in Table 4.

[0820] (Fabrication of outer layer film C)

[0821] First, a sealant film was produced by laminating a mixture of Ultjex 1520L and UMERIT0520F / MB2 in a mass ratio of 50 / 50, and a mixture of Ultjex 1520L / EMB-21 in a mass ratio of 97 / 3, by inflation film formation at 160°C.

[0822] Next, by using Novatech LC520 as an adhesive layer by an extrusion coating method at 320°C, a biaxially stretched nylon film, Bonyl RX, and the surface of the sealant film obtained above, Ultjex 1520L, were laminated to obtain an outer layer film C.

[0823] The layer composition and evaluation results are shown in Table 4.

[0824] (Fabrication of outer layer films D, F, and H)

[0825] With the composition listed in Table 4, outer layer films D, F, and H were obtained by operating in the same manner as outer layer film C. The layer composition and evaluation results are shown in Table 4.

[0826] (Fabrication of outer layer films E, G, and I)

[0827] With the configurations listed in Table 4, outer layer films E, G, and I were obtained by operating in the same manner as outer layer film A. The layer configurations and evaluation results are shown in Table 4.

[0828] [Table 4]

[0829]

[0830] <Example 1>

[0831] [Production of inner layer film]

[0832] First, mixture 1 was prepared for the odor adsorption layer and mixture 2 for the odor non-adsorption layer.

[0833] Mixture 1:

[0834] UMERIT0520F 50 mass parts

[0835] MB2 50 mass parts

[0836] Mixture 2:

[0837] Ultjex 1520L 97 Mass Part

[0838] EMB-21 3 Mass Part

[0839] Then, Ultjex 1520L, the above mixture 1, and the above mixture 2 were laminated by inflation film formation at 160°C to produce an inner layer film A having a three-layer structure. Details are shown in Table 5.

[0840] [Production and Evaluation of Packaging]

[0841] Using the outer layer film A, inner layer film A, and contents extraction port A obtained above, a packaging body (the size of the double pouch part is 450 mm × 450 mm, and the diameter of the contents extraction port A is 31 mm) as shown in Fig. 4 was manufactured, and heat sealability, rupture resistance, pinhole resistance (inner layer film), and TOC increase concentration in the filling water were evaluated.

[0842] The detailed configuration and evaluation results of the laminate are shown in Table 5.

[0843] <Examples 2–19, Comparative Examples 1–5>

[0844] According to the formulations described in Tables 5 to 8, a mixture for an odor adsorption layer and / or an odor non-adsorption layer was obtained in the same manner as in Example 1, and an inner layer film was prepared.

[0845] In addition, according to the descriptions in Tables 5 to 8, packaging bodies were manufactured by combining an outer layer film and a contents extraction port, and evaluated in the same manner. The detailed composition and evaluation results of the packaging bodies are shown in Tables 5 to 8.

[0846] <Evaluation>

[0847] [Unveiling]

[0848] The appearance was observed and evaluated sensorially. The evaluation criteria are as follows.

[0849] ○: Film formation is possible without wrinkles or harmful substances forming on the film.

[0850] ×: Numerous wrinkles or harmful substances form on the film, making film removal difficult.

[0851] [Impact resistance]

[0852] In the examples and comparative examples, 10 L of water was filled into the interior of the packaging made, and the operation of dropping the packaging from a height of 1 m after filling with water was repeated a total of 3 times to evaluate whether the bag was damaged.

[0853] Determination of pass / fail status

[0854] ◎: No pocket breakage in 3 drop tests .Pass

[0855] ○: One pocket destroyed in 3 drop tests. Pass.

[0856] ×: All pockets destroyed in 3 drop tests. Fail.

[0857] [Pinhole resistance of inner layer film monolith]

[0858] The inner layer film produced was cut to A4 size (30 cm × 21 cm), and the number of pinholes occurring within a 30 cm × 21 cm area of ​​each sample after bending was counted using a Gelboflex tester (manufactured by Testa Sangyo Co., Ltd., BE-1005). 160 or fewer were considered acceptable.

[0859] Temperature: 23℃

[0860] Gelbo bending count: 5,000 times

[0861] [Pinhole resistance of the packaging]

[0862] The manufactured packaging was bundled for transport as a packaging for liquid contents for BIBs and returned via an actual transport route, and the number of pinholes that occurred in the inner layer film of the pouch was counted. 160 or fewer were considered acceptable.

[0863] [Increase in TOC concentration in filling water]

[0864] In the examples and comparative examples, before manufacturing the packaging body, UV irradiation sterilization treatment was performed in advance on the inner film side of the packaging material constituting the packaging body.

[0865] In the packaging obtained in the examples and comparative examples, 1000 g of water at 65°C (distilled water for high-speed liquid chromatography, Junseikagaku) ​​was hot-packed to produce a packaging liquid filler, and after storing at 35°C for 2 weeks, the TOC concentration of the filled water was measured using the TOC-L total organic carbon system manufactured by Shimadzu Seisakusho Inc.

[0866] Next, the TOC concentration was measured in the same way for the water before charging.

[0867] The increase in TOC concentration for each package was calculated using the following formula.

[0868] TOC Concentration Increase = TOC Concentration of Filling Water After Storage - TOC Concentration of Water Before Filling

[0869] TOC concentration of water before filling: 0.02 ppm

[0870] UV irradiation sterilization treatment conditions

[0871] UV wavelength: 253.7 nm

[0872] Investigation time: 10 seconds

[0873] Temperature: 25℃

[0874] [Table 5]

[0875]

[0876] [Table 6]

[0877]

[0878] [Table 7]

[0879]

[0880] [Table 8]

[0881]

[0882] <Summary of Results>

[0883] The packaging materials of all examples exhibited good film-forming properties, wave-impact characteristics, heat sealability, and pinhole resistance, and the increase in TOC concentration was small.

[0884] Comparative Example 1, in which the outer layer film did not contain an odor adsorbent and the inner layer film did not contain either low-release polyethylene or an odor adsorbent, and Comparative Example 2, in which the inner layer film did not contain low-release polyethylene and contained hydrophilic zeolite instead of hydrophobic zeolite, showed a tendency for a high increase in TOC concentration. In addition, Comparative Examples 3, 4, and 5, in which the outer layer film or inner layer film contained an excessive amount of hydrophobic zeolite, showed a significant reduction in TOC concentration, but the film-forming properties of the outer layer film or inner layer film were inferior, resulting in inferior heat sealing and rupture resistance characteristics.

[0885] Regarding Assignment 3

[0886] <Example>

[0887] The details of the raw materials used in the examples are as follows.

[0888] ·PET film 1: Manufactured by Toyobo Co., Ltd., T4102, one side corona treated, thickness 12 µm.

[0889] · Aluminum foil 1: Manufactured by Toyo Aluminum Co., Ltd., thickness 7 µm.

[0890] [Resin components of sealant film]

[0891] [Table 1]

[0892]

[0893] [Resin component of the adhesive layer (extrusion coating)]

[0894] ·LC600A: Manufactured by Nippon Polyethylene Co., Ltd., LDPE, MFR: 7.0 g / 10 min, Density: 0.918 g / cm³

[0895] [Resin component of the adhesive layer (dry lamination)]

[0896] · Dry Laminate Adhesive 1: Manufactured by Rok Paint Co., Ltd., RU004 / H-1. Polyester-based adhesive, application amount 3.5 g / ㎡ per adhesive layer, drying temperature 70℃.

[0897] [Odor Adsorbent]

[0898] · Kesmon NS-241: Manufactured by Doagosei Co., Ltd., inorganic porous body supporting an amino group-containing compound. Average particle size 3.5 μm.

[0899] [Hypothecylinder Zeolite]

[0900] · Mizukasibus EX-122: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / Al2O3 molar ratio = 32 / 1, average particle size = 2.5–5.5 μm.

[0901] · Silton MT400: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 400 / 1, average particle size = 5–7 µm.

[0902] · Silton MT2000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 2000 / 1, average particle size = 2–4 µm.

[0903] · Silton MT-8000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 8000 / 1, average particle size = 0.8 µm.

[0904] · Hydrophilic zeolite: Mizuka Shibs Y-420 manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 5 / 1, average particle size = 5 µm.

[0905] [Preparation of Masterbatch]

[0906] The master batch was produced by adjusting as follows.

[0907] (Adjustment of Master Batch 1)

[0908] Master Batch 1 (MB1) was obtained by melt blending Novatech LC600A, an LLDPE as thermoplastic resin A, and Mizukasivs EX-122, a hydrophobic zeolite of an odor adsorbent, in the following ratio.

[0909] Novatech LC600A 90 mass parts

[0910] Mizukasivus EX-122 10 Mass Part

[0911] (Adjustment of Master Batch 2–7)

[0912] According to the formulation of Table 2, thermoplastic resin A and an odor adsorbent were melt-blended in the same manner as Master Batch 1 to obtain Master Batches 2 to 7 (MB2 to 7).

[0913] [Table 2]

[0914]

[0915] [Adjustment of Odor Adsorption Sealant Layer Resin Composition]

[0916] (Preparation of odor-adsorbing sealant layer resin composition 1)

[0917] Masterbatch 1 (MB1) and Ultjex 1520L, which is LLDPE as the thermoplastic resin C, were melt-blended in the following ratios to obtain an odor-adsorbing sealant layer resin composition 1.

[0918] Master Batch 1 16.7 parts by mass

[0919] Ult-Jex 1520L 83.3 parts of mass

[0920] (Adjustment of odor-adsorbing sealant layer resin compositions 2 to 12)

[0921] According to the formulation of Table 3, a master batch and thermoplastic resin C were melt-blended in the same manner as odor-adsorbing sealant layer resin composition 1 to obtain odor-adsorbing sealant layer resin compositions 2 to 12.

[0922] [Table 3]

[0923]

[0924] [Adjustment of Adhesive Layer Resin Composition]

[0925] (Preparation of adhesive layer resin composition 1)

[0926] Mizukasivs EX-122, a hydrophobic zeolite of an odor adsorbent, and Dry Laminate Adhesive 1, an adhesive, were mixed in the following ratios to obtain an adhesive layer resin composition 1.

[0927] Mizukasivus EX-122 10 Mass Part

[0928] Dry laminate adhesive 1 90 parts by mass

[0929] (Adjustment of adhesive layer resin compositions 2 to 12)

[0930] Adhesive layer resin compositions 2 to 12 were obtained by melt blending an odor adsorbent or masterbatch with an adhesive in the same manner as adhesive layer resin composition 1 according to the formulation of Table 4.

[0931] [Table 4]

[0932]

[0933] <Example 1>

[0934] An odor adsorption sealant layer resin composition 1 for an odor adsorption sealant layer and an odor non-adsorption sealant layer Ultjex 1520L were laminated by inflation film formation at 160°C to obtain a sealant film having a three-layer structure consisting of an odor non-adsorption layer (10 μm) / an odor adsorption layer (30 μm) / an odor non-adsorption layer (10 μm).

[0935] Next, dry laminate adhesive 1 was applied to the corona-treated surface of PET film 1 at a drying amount of 3.5 g / m² and dried at 70°C, and aluminum foil 1 was laminated by the dry lamination method to obtain a laminate precursor.

[0936] Then, adhesive 1 as an odor-non-adsorbing adhesive layer was applied to the surface of aluminum foil 1 of the laminate precursor at a coating amount of 3.5 g / m² after drying and dried at 70°C.

[0937] Next, the sealant film with the three-layer composition obtained above was laminated onto the surface of dry laminate adhesive 1 to obtain an odor-adsorbing laminate.

[0938] The layer composition of the obtained odor adsorption laminate is as follows. The detailed layer composition and evaluation results are listed in Table 5.

[0939] PET film 1 (12 µm) / adhesive layer (3.5 g / m²) / aluminum foil 1 (7 µm) / odor non-adsorbent adhesive layer (3.5 g / m²) / odor non-adsorbent layer (10 µm) / odor adsorbent layer (30 µm) / odor non-adsorbent layer (10 µm)

[0940] <Examples 2–8, 10–12>

[0941] A sealant film was obtained by operating in the same manner as in Example 1, except that the resin for the odor-non-adsorbent sealant layer and the odor-adsorbent sealant layer resin composition were replaced with those listed in Table 5.

[0942] Next, a laminated precursor was obtained by operating in the same manner as in Example 1.

[0943] Then, an odor-non-adsorbent adhesive layer was formed on the laminate precursor by operating it in the same manner as in Example 1, and the sealant film obtained above was laminated to obtain an odor-adsorbent laminate. Detailed layer composition and evaluation results are listed in Tables 5 and 6.

[0944] <Example 9>

[0945] A sealant film was obtained by operating in the same manner as in Example 1, except that the sealant film was composed of a single layer of only an odor-adsorbing sealant layer (50 μm) using only the odor-adsorbing sealant layer resin composition 9.

[0946] Next, a laminate precursor was prepared in the same manner as in Example 1 to form an odor-non-adsorbing adhesive layer, and the sealant film obtained above was laminated to obtain an odor-adsorbing laminate. Detailed layer composition and evaluation results are listed in Table 6.

[0947] <Example 13>

[0948] First, a sealant film was obtained by operating in the same manner as in Example 1, except that the odor adsorption sealant layer resin composition 1 was replaced with the odor adsorption sealant layer resin composition 2.

[0949] Next, a laminated precursor was prepared in the same manner as in Example 1.

[0950] On the surface of aluminum foil 1 of the obtained laminate precursor, a resin composition 1 for a dry laminate adhesive layer, which serves as an odor-adsorbing adhesive layer, was applied at a coating amount of 3.5 g / m² after drying and dried at 70°C.

[0951] Next, the sealant film obtained above was laminated onto the surface of the adhesive layer resin composition 1 to obtain an odor-adsorbing laminate. The detailed layer composition and evaluation results are listed in Table 5.

[0952] <Examples 14–16, Comparative Example 3>

[0953] An odor-adsorbing laminate was obtained by operating in the same manner as in Example 11, except that adhesive layer resin composition 1 was replaced with adhesive layer resin compositions 2 to 5 in the combinations listed in Table 5. Detailed layer composition and evaluation results are listed in Table 6.

[0954] <Examples 17–23>

[0955] An odor-adsorbing laminate was obtained by operating in the same manner as in Example 11, except that the odor-adsorbing adhesive layer was replaced with extrusion adhesive layer resin compositions 6 to 11 and laminated to a layer thickness of 15 μm. Detailed layer compositions and evaluation results are listed in Tables 7 and 8.

[0956] <Example 24>

[0957] An odor-adsorbing laminate was obtained by operating in the same manner as in Example 23, except that the sealant layer consisted only of an odor-non-adsorbing sealant layer containing 50 μm thick Ultjex 1520L. Detailed layer composition and evaluation results are listed in Table 8.

[0958] <Comparative Example 1>

[0959] A sealant film was produced containing only a single layer of an odor-non-adsorbing sealant layer containing Ultjex 1520L.

[0960] Next, a laminated precursor was obtained by operating in the same manner as in Example 1.

[0961] Then, an odor adsorption laminate was obtained by operating in the same manner as in Example 1. The detailed layer composition and evaluation results are listed in Table 8.

[0962] <Comparative Example 2>

[0963] A sealant film comprising a single layer of only an odor-adsorbing sealant layer comprising an odor-adsorbing sealant layer resin composition 12 was produced.

[0964] Next, a laminated precursor was obtained by operating in the same manner as in Example 1.

[0965] Then, an odor adsorption laminate was obtained by operating in the same manner as in Example 1. The detailed layer composition and evaluation results are listed in Table 8.

[0966] Evaluation Method

[0967] [Hit Siilseong]

[0968] The odor adsorption laminates prepared in the examples and comparative examples were cut into 10 cm × 10 cm pieces, folded in half and overlapped, and a 1 cm × 10 cm area was heat-sealed using a heat seal tester (manufactured by Testasangyo Co., Ltd.: TP-701-A) to produce a sample in which the ends were not heat-sealed and were not bonded, and were separated into two branches.

[0969] This sample was cut into strips 15 mm wide, and each of the two ends was mounted on a tensile testing machine to measure the tensile strength (N / 15 mm) and determine whether it passed.

[0970] (Hit seal condition)

[0971] Temperature: 160℃

[0972] Pressure: 1 kgf / ㎠

[0973] Time: 1 second

[0974] (Tensile strength test conditions)

[0975] Test speed: 300 mm / min

[0976] Load range: 50 N

[0977] (Criteria for determining pass / fail)

[0978] ○: 30 N / 15 mm or greater, passes.

[0979] ×: Less than 30 N / 15 mm, fail.

[0980] [Change of Hobby]

[0981] Using the odor-adsorbing laminates obtained in the examples and comparative examples, pouches (13 cm × 17 cm) were fabricated, and UV irradiation sterilization treatment was performed on the inner surface of each laminate beforehand.

[0982] Then, 100 g of water at 65°C (manufactured by Suntory Co., Ltd., Alpine Natural Water) was hot-packed into each obtained package to produce a package liquid filling, and a sensory evaluation was conducted regarding the change in taste after storing at 10°C for one week.

[0983] The evaluation indicators are as follows. There were 5 participants in the sensory evaluation experiment, and the average was calculated and used as the evaluation result.

[0984] 1: Has a strong hobby

[0985] 2: The hobby has somewhat lessened.

[0986] 3: Hobbies have been significantly reduced.

[0987] 4: Equivalent to water before charging

[0988] [Table 5]

[0989]

[0990] [Table 6]

[0991]

[0992] [Table 7]

[0993]

[0994] [Table 8]

[0995]

[0996] <Summary of Results>

[0997] The packaging of all embodiments, which applied a sealant film and an adhesive layer (extrusion coating layer, dry laminate layer) with added odor adsorbent, was able to obtain good heat sealability and sensory evaluation results.

[0998] In Comparative Example 1, which did not contain an odor adsorbent, heat sealability was good but sensory evaluation was not improved, and in Comparative Examples 2 and 3, which contained an excess of an odor adsorbent in the sealant film and adhesive layer (extrusion coating layer, dry laminate layer), sensory evaluation was good but heat sealability tended to deteriorate.

[0999] Regarding Assignment 4

[1000] <Example>

[1001] The details of the raw materials used in the examples are as follows.

[1002] [Low-solubility polyethylene and general-purpose polyethylene for inner and outer layer films]

[1003] [Table 1]

[1004]

[1005] [Resin for resin composition for extracting contents]

[1006] [Table 2]

[1007]

[1008] [Odor Adsorbent]

[1009] (Chemical adsorbent-supported inorganic porous material)

[1010] · Kesmon NS-241: Manufactured by Doagosei Co., Ltd., inorganic porous body supporting an amino group-containing compound. Average particle size 3.5 μm.

[1011] (Hypothecylinder zeolite)

[1012] · Mizukasibus EX-122: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / Al2O3 molar ratio = 32 / 1, average particle size 2.5–5.5 μm.

[1013] · Silton MT400: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 400 / 1, average particle size 5–7 µm.

[1014] · Silton MT2000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 2000 / 1, average particle size 2–4 µm.

[1015] · Silton MT-8000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 8000 / 1, average particle size 0.8 µm.

[1016] (Hydrophilic zeolite)

[1017] · Mizuka Shibs Y-420: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / Al2O3 molar ratio = 5 / 1, average particle size 5 µm.

[1018] [etc]

[1019] · EMB-21: Manufactured by Sumitomo Chemicals, Inc., anti-blocking agent.

[1020] · PEX ABT-16: Nippon Polyethylene Co., Ltd., anti-blocking agent.

[1021] ·EMB-10: Sumitomo Chemical Co., Ltd., Slipper.

[1022] [Preparation of Masterbatch]

[1023] The MB (Master Batch) was produced by adjusting it as follows.

[1024] (Adjustment of MB1)

[1025] Master Batch 1 (MB1) was obtained by melt blending Ultjex 1520L, an LLDPE of low-leach polyethylene, and Mitsucasivs EX-122, a hydrophobic zeolite, in the following ratio.

[1026] Ultjex 1520L 90 mass parts

[1027] Mizukasivus EX-122 10 Mass Part

[1028] (Adjustment of MB2~9)

[1029] According to the formulation of Table 3, the raw materials were melt-blended in the same way as MB1 to obtain master batches 2 to 9 (MB2 to 9).

[1030] [Table 3]

[1031]

[1032] [Production of outer layer film]

[1033] Outer layer films A, B, and C listed in Table 4 were produced.

[1034] (Fabrication of outer layer film A)

[1035] An outer layer sealant film A with a thickness of 80 μm was produced by inflation-forming Ultjex 1520L at 160°C.

[1036] (Fabrication of outer layer film B)

[1037] A sealant film with a thickness of 40 μm was produced by inflation-forming Ultjex 1520L at 160°C.

[1038] Bonyl RX (15 μm thickness, Kojin Film & Chemicals Co., Ltd.), which is a biaxially stretched nylon film as a substrate layer, and the sealant film obtained above are bonded together with an LDPE resin (Novatech LC520, Nippon Polyethylene) as an adhesive layer by an extrusion coating method at 320°C to obtain an outer layer film B consisting of a three-layer structure of a biaxially stretched nylon film (15 μm) / LDPE (15 μm) / sealant film (40 μm).

[1039] (Fabrication of outer layer film C)

[1040] Except for replacing the substrate layer with a biaxially stretched nylon film, IB-ONY (15 μm thickness, Dainippon Insatsu Co., Ltd., gas barrier stretched nylon film), the outer layer film C was obtained by operating it in the same way as the outer layer film B.

[1041] [Table 4]

[1042]

[1043] [Construction of contents extraction port]

[1044] Content extraction port A was produced by injection molding at 200°C using Novatech UF370. Likewise, content extraction ports B to E were produced according to the specifications in Table 2.

[1045] <Example 1>

[1046] [Production of inner layer film]

[1047] A resin composition for an odor adsorption layer was prepared by melt-kneading the following raw materials in the following proportions.

[1048] MB1 16.7 mass parts

[1049] Ult-Jex 1520L 83.3 parts of mass

[1050] Using UltJex 1520L for odor non-adsorbent layers 1 and 2 and the resin composition for the odor adsorbent layer obtained above, laminated by inflation film making at 160°C to obtain a sealant layer film having a three-layer structure consisting of odor non-adsorbent layer 1 (16 μm) / odor adsorbent layer (48 μm) / odor non-adsorbent layer 2 (16 μm).

[1051] [Production and Evaluation of Packaging]

[1052] Using the inner layer film and outer layer film A obtained above and a contents extraction port, a packaging body as shown in FIG. 16 (the size of the double pouch part is 450 mm × 450 mm, and the diameter of the contents extraction port is 31 mm) was fabricated, and heat sealability, rupture resistance, pinhole resistance (inner layer film), and TOC increase concentration in the filling water were evaluated. The detailed composition of the packaging body and the evaluation results are shown in Table 5.

[1053] <Examples 2–14, Comparative Example 2>

[1054] According to the description in Table 5, a resin composition for an odor adsorption layer was prepared in the same manner as in Example 1, a film for a sealant layer was obtained, a packaging body was manufactured, and evaluated. The detailed composition of the packaging body and the evaluation results are shown in Table 5.

[1055] <Comparative Example 1>

[1056] Using Evolu SP2020 of LLDPE, a general-purpose polyethylene rather than a low-solubility one, an inflation film was formed at 160°C to obtain an inner layer sealant film (80 μm) containing only an odor-non-adsorbent layer, and a packaging body was manufactured and evaluated in the same manner as in Example 1. The detailed composition of the packaging body and the evaluation results are shown in Table 5.

[1057] <Comparative Example 3>

[1058] According to the description in Table 5, a resin composition for an odor adsorption layer was prepared in the same manner as in Example 1, and a film for a sealant layer containing only an odor adsorption layer was obtained, and a packaging body was manufactured and evaluated. The detailed composition of the packaging body and the evaluation results are shown in Table 5.

[1059] <Evaluation>

[1060] [Unveiling]

[1061] The appearance of the film was observed and evaluated sensorially. The evaluation criteria are as follows.

[1062] ○: Film formation is possible without wrinkles or harmful substances forming on the film.

[1063] ×: Numerous wrinkles or harmful substances form on the film, making film removal difficult.

[1064] [Impact resistance]

[1065] In the examples and comparative examples, 10 L of water was filled into the interior of the packaging made, and the operation of dropping the packaging from a height of 1 m after filling with water was repeated a total of 3 times to evaluate whether the bag was damaged.

[1066] Pass / Fail Decision

[1067] ◎: No pocket destruction in 3 drop tests.

[1068] ○: One pocket destroyed in 3 drop tests. Pass.

[1069] ×: All pockets destroyed in 3 drop tests. Fail.

[1070] [Pinhole resistance of inner layer film monolith]

[1071] The inner layer film produced was cut to A4 size (30 cm × 21 cm), and the number of pinholes occurring within a 30 cm × 21 cm area of ​​each sample after bending was counted using a Gelboflex tester (manufactured by Testa Sangyo Co., Ltd., BE-1005). 160 or fewer were considered acceptable.

[1072] Temperature: 23℃

[1073] Gelbo bending count: 5,000 times

[1074] [Pinhole resistance of the packaging]

[1075] The manufactured packaging was bundled for transport as a packaging for liquid contents for BIBs and returned via an actual transport route, and the number of pinholes that occurred in the inner layer film of the pouch was counted. 160 or fewer were considered acceptable.

[1076] [Increase in TOC concentration in filling water]

[1077] In the examples and comparative examples, before manufacturing the packaging body, UV irradiation sterilization treatment was performed in advance on the inner film side of the packaging material constituting the packaging body.

[1078] In the packaging obtained in the examples and comparative examples, 1000 g of water at 65°C (distilled water for high-speed liquid chromatography, Junseikagaku) ​​was hot-packed to produce a packaging liquid filler, and after storing at 35°C for 2 weeks, the TOC concentration of the filled water was measured using the TOC-L total organic carbon system manufactured by Shimadzu Seisakusho Inc.

[1079] Next, the TOC concentration was measured for the water before charging as well.

[1080] The increase in TOC concentration for each package was calculated using the following formula.

[1081] TOC Concentration Increase = TOC Concentration of Filling Water After Storage - TOC Concentration of Water Before Filling

[1082] TOC concentration of water before filling: 0.02 ppm

[1083] UV irradiation sterilization treatment conditions

[1084] UV wavelength: 253.7 nm

[1085] Investigation time: 10 seconds

[1086] Temperature: 25℃

[1087] [Table 5]

[1088]

[1089] <Summary of Results>

[1090] The packaging materials of all examples exhibited good film-forming properties, wave-impact characteristics, heat sealability, and pinhole resistance, and the increase in TOC concentration was small.

[1091] Comparative Example 1, which does not contain low-leaching polyethylene, hydrophobic zeolite, or chemical adsorbent-supported inorganic porous material, and Comparative Example 2, which does not contain low-leaching polyethylene and contains hydrophilic zeolite instead of hydrophobic zeolite, showed a tendency for a high increase in TOC concentration. In addition, Comparative Example 3, which contains an excessive amount of hydrophobic zeolite, showed a significant reduction in TOC concentration, but the film-forming ability of the inner layer film was inferior, resulting in inferior heat sealing and rupture resistance characteristics.

[1092] Regarding Assignment 5

[1093] <Example>

[1094] The details of the raw materials used in the examples are as follows.

[1095] [Low-solubility polyethylene and general-purpose polyethylene for inner and outer layer films]

[1096] [Table 1]

[1097]

[1098] [Resin for resin composition for extracting contents]

[1099] [Table 2]

[1100]

[1101] [Odor Adsorbent]

[1102] (Chemical adsorbent-supported inorganic porous material)

[1103] · Kesmon NS-241: Manufactured by Doagosei Co., Ltd., inorganic porous body supporting an amino group-containing compound. Average particle size 3.5 μm.

[1104] (Hypothecylinder zeolite)

[1105] · Mizukasibus EX-122: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / Al2O3 molar ratio = 32 / 1, average particle size 2.5–5.5 μm.

[1106] · Silton MT400: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 400 / 1, average particle size 5–7 µm.

[1107] · Silton MT2000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 2000 / 1, average particle size 2–4 µm.

[1108] · Silton MT-8000: Manufactured by Mizusawa Kagaku Kogyo Co., Ltd. SiO2 / Al2O3 molar ratio = 8000 / 1, average particle size 0.8 µm.

[1109] (Hydrophilic zeolite)

[1110] · Mizuka Shibs Y-420: Manufactured by Mizusawa Kagaku High School Co., Ltd. SiO2 / Al2O3 molar ratio = 5 / 1, average particle size 5 µm.

[1111] [etc]

[1112] · EMB-21: Manufactured by Sumitomo Chemicals, Inc., anti-blocking agent.

[1113] · PEX ABT-16: Nippon Polyethylene Co., Ltd., anti-blocking agent.

[1114] ·EMB-10: Sumitomo Chemical Co., Ltd., Slipper.

[1115] [Preparation of Masterbatch]

[1116] The outer layer film, inner layer film, and MB (masterbatch) for the resin composition of the contents extraction port were prepared by adjusting as follows.

[1117] (Adjustment of MB1)

[1118] Novatech LC600A and the hydrophobic zeolite Mizukasivs EX-122 were melt-blended in the following ratios to obtain Master Batch 1 (MB1).

[1119] Novatech LC600A 90 mass parts

[1120] Mizukasivus EX-122 10 Mass Part

[1121] (Adjustment of MB2~13)

[1122] According to the formulations of Tables 3 and 4, the raw materials were melt-blended in the same manner as MB1 to obtain master batches 2 to 13 (MB2 to 13).

[1123] [Table 3]

[1124]

[1125] [Table 4]

[1126]

[1127] [Production of outer layer film]

[1128] (Fabrication of outer layer film A)

[1129] A resin composition for an odor adsorption layer was prepared by melt-kneading the following raw materials in the following proportions.

[1130] Ultjex 1520L 80 mass parts

[1131] MB2 20 Mass part

[1132] Using UltJex 1520L for odor non-adsorbent layers 1 and 2 and the resin composition for the odor adsorbent layer obtained above, laminated by inflation film formation at 160°C to obtain a sealant layer film having a three-layer structure consisting of odor non-adsorbent layer 1 (10 μm) / odor adsorbent layer (20 μm) / odor non-adsorbent layer 2 (10 μm).

[1133] The sealant layer film obtained above and the biaxially stretched nylon film 1 (Kojin Film & Chemicals Co., Ltd., Bonyl RX, 15 μm thickness) as a substrate layer were bonded by an extrusion coating method at 320°C with LDPE resin 1 (Nippon Polyethylene Co., Ltd., Novatech LC520) interposed as an adhesive layer to obtain an outer layer film A having a composition of a substrate layer (15 μm) / adhesive layer (15 μm) / odor non-adsorbent layer 1 (10 μm) / odor adsorbent layer (20 μm) / odor adsorbent layer 2 (10 μm). The detailed layer composition is shown in Table 5.

[1134] (Production of outer layer films B~I)

[1135] According to the composition of each outer layer film shown in Table 5, each was prepared with or without the presence of a substrate layer film, an adhesive layer, and an odor non-adsorbent layer, and a resin composition for an odor adsorbent layer was prepared, and a film for a sealant layer was produced by operating it in the same way as outer layer film A, and outer layer films B to I were produced.

[1136] Regarding outer layer films C, E, and F, the sealant layer was a film for a sealant layer consisting only of an odor adsorption layer, and regarding outer layer film I, the sealant layer was a film for a sealant layer consisting only of an odor non-adsorption layer.

[1137] [Table 5]

[1138]

[1139] [Production of inner layer film]

[1140] (Fabrication of inner layer film A)

[1141] A resin composition for an odor adsorption layer was prepared by melt-kneading the following raw materials in the following proportions.

[1142] Ult-Jex 1520L 83.3 parts of mass

[1143] MB1 16.7 mass parts

[1144] Using UltJex 1520L for odor non-adsorbent layers c and d and the resin composition for the odor adsorbent layer obtained above, the film was laminated by inflation film formation at 160°C to obtain an inner layer film A comprising only a sealant layer with a three-layer structure consisting of odor non-adsorbent layer c (16 μm) / odor adsorbent layer (48 μm) / odor non-adsorbent layer d (16 μm). Details are shown in Table 6.

[1145] (Production of inner layer films B~P)

[1146] A resin composition for the odor adsorption layer was prepared according to the composition of each inner layer film shown in Table 6, a resin for the odor non-adsorption layer was selected, and inner layer films B to O were produced by operating in the same manner as inner layer film A.

[1147] Regarding the inner layer film M, only the odor non-adsorbent layer was manufactured, and regarding the inner layer film O, only the odor adsorbent layer was manufactured.

[1148] [Table 6]

[1149]

[1150] [Construction of contents extraction port]

[1151] Resin compositions A to J for extracting contents were prepared by dry blending each raw material in the ratios shown in Table 7.

[1152] Then, each of the resin compositions obtained above was injection molded at 200°C to produce contents extraction ports A to J.

[1153] [Table 7]

[1154]

[1155] <Example 1>

[1156] Using the outer layer film A, inner layer film A, and content extraction port A obtained above, a packaging body as shown in FIG. 16 (the size of the double pouch part is 450 mm × 450 mm, and the diameter of the content extraction port A is 31 mm) was manufactured, and heat sealability, rupture resistance, pinhole resistance (inner layer film), and TOC increase concentration in the filling water were evaluated.

[1157] The detailed configuration and evaluation results of the laminate are shown in Table 8.

[1158] <Examples 2–25, Comparative Examples 2–5>

[1159] According to the formulation listed in Table 3, a mixture for an odor adsorption layer was obtained in the same manner as in Example 1, and a sealant film was prepared and evaluated.

[1160] The detailed configuration and evaluation results of the laminate are shown in Tables 8 to 10.

[1161] <Comparative Example 1>

[1162] Using Evolu SP2020 of LLDPE, which is a high-extraction polyethylene, an inner layer sealant film (80 μm) was obtained by inflation film formation at 160°C.

[1163] In addition, a molded product was produced by injection molding at 200°C using Novatech UF370.

[1164] Next, it was evaluated in the same manner as in Example 1. The composition and evaluation results of the laminate are shown in Table 5.

[1165] <Evaluation>

[1166] [Unveiling]

[1167] It was evaluated sensorially by observing the appearance. The evaluation criteria are as follows.

[1168] ○: Film formation is possible without wrinkles or harmful substances forming on the film.

[1169] ×: Numerous wrinkles or harmful substances form on the film, making film removal difficult.

[1170] [Impact resistance]

[1171] In the examples and comparative examples, 10 L of water was filled into the interior of the packaging made, and the operation of dropping the packaging from a height of 1 m after filling with water was repeated a total of 3 times to evaluate whether the bag was damaged.

[1172] Determination of pass / fail status

[1173] ◎: No pocket destruction in 3 drop tests. Passed.

[1174] ○: One pocket destroyed in 3 drop tests. Pass.

[1175] ×: All pockets destroyed in 3 drop tests. Fail.

[1176] [Pinhole resistance of inner layer film monolith]

[1177] The inner layer film produced was cut to A4 size (30 cm × 21 cm), and the number of pinholes occurring within a 30 cm × 21 cm area of ​​each sample after bending was counted using a Gelboflex tester (manufactured by Testa Sangyo Co., Ltd., BE-1005). 160 or fewer were considered acceptable.

[1178] Temperature: 23℃

[1179] Gelbo bending count: 5,000 times

[1180] [Pinhole resistance of the packaging]

[1181] The manufactured packaging was bundled for transport as a packaging for liquid contents for BIBs and returned via an actual transport route, and the number of pinholes that occurred in the inner layer film of the pouch was counted. 160 or fewer were considered acceptable.

[1182] [Increase in TOC concentration in filling water]

[1183] In the examples and comparative examples, before manufacturing the packaging body, UV irradiation sterilization treatment was performed in advance on the inner film side of the packaging material constituting the packaging body.

[1184] In the packaging obtained in the examples and comparative examples, 1000 g of water at 65°C (distilled water for high-speed liquid chromatography, Junseikagaku) ​​was hot-packed to produce a packaging liquid filler, and after storing at 35°C for 2 weeks, the TOC concentration of the filler was measured using the TOC-L total organic carbon system manufactured by Shimadzu Seisakusho Inc.

[1185] Next, the TOC concentration was measured for the water before charging as well.

[1186] The increase in TOC concentration for each package was calculated using the following formula.

[1187] TOC Concentration Increase = TOC Concentration of Filling Water After Storage - TOC Concentration of Water Before Filling

[1188] TOC concentration of water before filling: 0.02 ppm

[1189] UV irradiation sterilization treatment conditions

[1190] UV wavelength: 253.7 nm

[1191] Investigation time: 10 seconds

[1192] Temperature: 25℃

[1193] [Table 8]

[1194]

[1195] [Table 9]

[1196]

[1197] [Table 10]

[1198]

[1199] <Summary of Results>

[1200] The packaging materials of all examples exhibited good film-forming properties, wave-impact characteristics, heat sealability, and pinhole resistance, and the increase in TOC concentration was small.

[1201] Comparative Example 1, which does not contain low-leaching polyethylene, hydrophobic zeolite, or chemical adsorbent-supported inorganic porous material, and Comparative Example 2, which does not contain low-leaching polyethylene and contains hydrophilic zeolite instead of hydrophobic zeolite, showed a tendency for a high increase in TOC concentration. In addition, Comparative Examples 3, 4, and 5, which contain an excessive amount of hydrophobic zeolite, showed a large reduction in TOC concentration, but the film formation properties of the outer and inner layers were inferior, and the heat sealing and rupture resistance characteristics were inferior. Explanation of the symbols

[1202] Regarding Assignment 1 1: Content packaging pouch, 2: Pouch section, 3: Content extraction port, 3a: Cap, 3b: Cylindrical part, 3c: Flange, 4: Heat seal section of the pouch, A, B: Cross-section lines, 5: Upper film, 6: Lower film Regarding Assignment 2 1. Odor-adsorbing sealant film, 2. Adhesion between outer layer film and inner layer film, 3. Outer layer film, 4. Inner layer film, 5. Sealant layer, 6. Odor-adsorbing layer, 6a. Odor-adsorbing layer, 6b. Odor-adsorbing layer, 7. Odor-non-adsorbing layer, 8. Substrate layer, 9. Adhesive layer, 11. Packaging body, liquid content packaging body for BIB, 12. Double pouch section, 13. Content extraction port, 14. Heat seal section of double pouch section, 15. Upper film, 16. Lower film, A, B. Cross-section lines Regarding Assignment 3 1. Odor-adsorbing laminate, 2. Substrate layer, 3. Adhesive layer, 3a. Odor-adsorbing adhesive layer, 3b. Odor-non-adsorbing adhesive layer, 4. Sealant layer, 4a. Odor-adsorbing sealant layer, 4b. Odor-non-adsorbing sealant layer Regarding Assignments 4 and 5 1: Packaging body, liquid content packaging body for BIB, 2: Double pouch section, 3: Content extraction port, 4: Heat seal section of the double pouch section, A, B: Cross-section lines, 5: Upper film, 6: Lower film, 7: Adhesion between outer and inner film, 8: Outer film, 9: Inner film, 10: Sealant layer, 11: Odor adsorption layer, 11a: Odor adsorption layer (concentration a), 11b: Odor adsorption layer (concentration b), 12: Odor non-adsorption layer, 13: Substrate layer, 14: Adhesive layer

Claims

Claim 1 An odor adsorption sealant film comprising at least an outer layer film and an inner layer film, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film comprises a sealant layer containing low-leaching polyethylene, wherein the low-leaching polyethylene has a concentration of leachable TOC contained in a film made solely of the low-leaching polyethylene that is 1.5 ppm or more and 250 ppm or less, and the concentration of leachable TOC is standardized by the JIS K 0805 Organic Carbon (TOC) Automatic Measuring Instrument, wherein the sealant layer of the inner layer film comprises an odor adsorption layer, wherein the odor adsorption layer comprises low-leaching polyethylene and an odor adsorbent, wherein the odor adsorbent comprises a hydrophobic zeolite, wherein the hydrophobic zeolite has a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the content of the hydrophobic zeolite within the sealant layer is 0.1 mass% or more and 13 mass% or less. Odor-absorbing sealant film. Claim 2 An odor-adsorbing sealant film according to claim 1, wherein the sealant layer of the outer layer film further comprises the odor-adsorbing layer. Claim 3 An odor adsorption sealant film according to claim 1, wherein the odor adsorbent further comprises a chemical adsorbent-supported inorganic porous body, and the content of the chemical adsorbent-supported inorganic porous body within the sealant layer is 0.1 mass% or more and 10 mass% or less. Claim 4 An odor-adsorbing sealant film according to any one of claims 1 to 3, wherein the density of the low-leaching polyethylene is 0.90 g / cm³ or higher and 0.94 g / cm³ or lower. Claim 5 An odor-adsorbing sealant film according to any one of claims 1 to 3, wherein the low-release polyethylene is LLDPE. Claim 6 An odor-adsorbing sealant film according to any one of claims 1 to 3, wherein the low-release polyethylene is one or more types selected from the group consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE. Claim 7 In any one of claims 1 to 3, the low-release polyethylene is an odor-adsorbing sealant film having a thickness of 50 μm made solely of the low-release polyethylene, wherein the number of pinholes generated after 5,000 cycles of Gelboplex at 23°C is 0 or 1 to 160. Claim 8 delete Claim 9 An odor-adsorbing sealant film according to claim 1, wherein the hydrophobic zeolite is melt-kneaded with a thermoplastic resin in advance at a mass ratio of hydrophobic zeolite / thermoplastic resin of 0.5 / 99.5 to 40 / 60. Claim 10 In paragraph 3, the chemical adsorbent-supported inorganic porous body is an odor-adsorbing sealant film that is pre-melted and kneaded with a thermoplastic resin in a ratio of chemical adsorbent-supported inorganic porous body / thermoplastic resin of 0.5 / 99.5 to 40 / 60. Claim 11 An odor-adsorbing sealant film according to claim 9 or 10, wherein the melt flow rate of the thermoplastic resin is 0.2 to 10.0 g / 10 min. Claim 12 An odor-adsorbing sealant film according to claim 3 or 10, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids. Claim 13 An odor-adsorbing sealant film according to claim 3 or 10, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has an amino group. Claim 14 An odor adsorption sealant film according to any one of claims 1 to 3, 9 and 10, wherein the odor adsorption layer comprises an odor non-adsorption layer on one or both sides, the odor non-adsorption layer comprises low-leaching polyethylene, and the layer does not comprise the odor adsorbent. Claim 15 An odor-adsorbing sealant film according to any one of claims 1 to 3, 9 and 10, wherein the outer layer film further comprises a substrate layer. Claim 16 An odor-adsorbing packaging material comprising an odor-adsorbing sealant film as described in any one of paragraphs 1 to 3, 9, and 10. Claim 17 A liquid contents packaging bag for BIBs made of the odor-absorbing packaging material described in Paragraph 16. Claim 18 An odor adsorption laminate comprising at least a substrate layer, an adhesive layer, and a sealant layer, wherein the adhesive layer or the sealant layer, or both, contain an odor adsorbent, the sealant layer contains low-leaching polyethylene, the low-leaching polyethylene has a concentration of leachable TOC contained in a film made solely of the low-leaching polyethylene that is 1.5 ppm or more and 250 ppm or less, the concentration of leachable TOC is standardized by the JIS K 0805 Organic Carbon (TOC) Automatic Measuring Instrument, where the adhesive layer contains the odor adsorbent, the content of the odor adsorbent in the adhesive layer is 0.3 mass% or more and 50 mass% or less, where the sealant layer contains the odor adsorbent, the content of the odor adsorbent in the sealant layer is 0.3 mass% or more and 15 mass% or less, and the odor adsorbent is a hydrophobic zeolite having a SiO2 / Al2O3 molar ratio of 30 / 1 or more and 8000 / 1 or less Odor adsorption laminate containing Claim 19 In paragraph 18, the odor adsorption laminate in which the adhesive layer is a dry laminate adhesive layer or a non-adhesive laminate adhesive layer. Claim 20 An odor adsorption laminate according to claim 18, wherein the adhesive layer is an extrusion coating adhesive layer or a sand laminate adhesive layer, and the content of the odor adsorbent in the adhesive layer is 0.3 mass% or more and 15 mass% or less. Claim 21 An odor adsorption laminate according to any one of claims 18 to 20, wherein the odor adsorbent further comprises a chemical adsorbent-supporting inorganic porous body. Claim 22 An odor adsorption laminate according to any one of claims 18 to 20, wherein the odor adsorbent is pre-melted and kneaded with thermoplastic resin A and a mass ratio of odor adsorbent / thermoplastic resin of 0.5 / 99.5 or higher and 40 / 60 or lower. Claim 23 An odor adsorption laminate according to any one of claims 18 to 20, wherein the adhesive layer further contains one or more types selected from the group consisting of polyurethane resin, polyester resin, polyamide resin, and polyolefin resin. Claim 24 An odor adsorption laminate according to any one of claims 18 to 20, wherein the sealant layer further contains a thermoplastic resin C having a melt flow rate of 0.2 g / 10 min or more and 10.0 g / 10 min or less. Claim 25 An odor adsorption laminate according to any one of claims 18 to 20, wherein the adhesive layer comprises an odor adsorption adhesive layer containing an odor adsorbent and an odor non-adsorption adhesive layer not containing an odor adsorbent, and the odor non-adsorption adhesive layer is in contact with one or both sides of the odor adsorption adhesive layer. Claim 26 An odor adsorption laminate according to any one of claims 18 to 20, wherein the sealant layer comprises an odor adsorption sealant layer containing an odor adsorbent and an odor non-adsorption sealant layer not containing an odor adsorbent, and the odor non-adsorption sealant layer is in contact with one or both sides of the odor adsorption sealant layer. Claim 27 An odor adsorption laminate according to claim 21, wherein the content of the hydrophobic zeolite in the adhesive layer is 0.3 mass% or more and 13 mass% or less, and the content of the chemical adsorbent-supported inorganic porous body in the adhesive layer is 0.3 mass% or more and 10 mass% or less. Claim 28 An odor adsorption laminate according to claim 21, wherein the content of the hydrophobic zeolite in the sealant layer is 0.1 mass% or more and 13 mass% or less, and the content of the chemical adsorbent-supported inorganic porous body in the sealant layer is 0.1 mass% or more and 10 mass% or less. Claim 29 In claim 21, the chemical adsorbent of the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids, in an odor adsorption laminate. Claim 30 In claim 29, the odor adsorption laminate in which the chemical adsorbent has an amino group. Claim 31 An odor-adsorbing film for packaging materials comprising an odor-adsorbing laminate as described in any one of claims 18 to 20. Claim 32 Odor-adsorbing packaging material comprising an odor-adsorbing film for packaging materials as described in Paragraph 31. Claim 33 An odor-adsorbing packaging material comprising at least an outer layer film and an inner layer film, wherein the outer layer film or the inner layer film, or both, comprise an odor-adsorbing film for packaging materials as described in claim 31, and the outer layer film and the inner layer film are only partially bonded to each other. Claim 34 Odor-absorbing packaging material for BIBs, made of the odor-absorbing packaging material described in Paragraph 33. Claim 35 Odor-absorbing liquid contents packaging material for BIBs, made of the odor-absorbing packaging material described in Paragraph 33. Claim 36 A packaging body having a double pocket portion comprising at least an outer layer film and an inner layer film, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film comprises a sealant layer containing low-leaching polyethylene, and the sealant layer of the inner layer film comprises an odor adsorption layer, and the odor adsorption layer comprises low-leaching polyethylene and an odor adsorbent, wherein the low-leaching polyethylene has a concentration of leachable TOC contained in a film made solely of low-leaching polyethylene of 1.5 ppm or more and 250 ppm or less, and the concentration of leachable TOC is standardized by the JIS K 0805 Organic Carbon (TOC) Automatic Counter, and the odor adsorbent comprises a hydrophobic zeolite, wherein the hydrophobic zeolite has a SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the content of the hydrophobic zeolite in the sealant layer of the inner layer film is 0.1 mass% or more 13 Packages with a mass percentage or less. Claim 37 A packaging body according to claim 36, wherein the odor adsorbent further comprises a chemical adsorbent-supported inorganic porous body, and the content of the chemical adsorbent-supported inorganic porous body within the sealant layer of the inner layer film is 0.1 mass% or more and 10 mass% or less. Claim 38 A packaging body according to claim 36 or 37, wherein the density of the low-leaching polyethylene is 0.90 g / cm³ or more and 0.94 g / cm³ or less. Claim 39 A packaging body in which the low-leaching polyethylene in paragraph 36 or 37 is LLDPE. Claim 40 A packaging body according to claim 36 or 37, wherein the low-leaching polyethylene is one or more types selected from the group consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE. Claim 41 In claim 36 or 37, the low-release polyethylene is a packaging body in which the number of pinholes occurring after 5,000 cycles of Gelboplex at 23°C in a 50 μm thick film made solely of the low-release polyethylene is 0 or 1 or more and 160 or less. Claim 42 delete Claim 43 In claim 36, the above hydrophobic zeolite is a packaging body in which the hydrophobic zeolite is melt-kneaded with a thermoplastic resin in advance at a mass ratio of hydrophobic zeolite / thermoplastic resin of 0.5 / 99.5 to 40 / 60. Claim 44 In claim 37, the chemical adsorbent-supported inorganic porous body is a packaging body that has been melt-kneaded with a thermoplastic resin in advance at a ratio of chemical adsorbent-supported inorganic porous body / thermoplastic resin of 0.5 / 99.5 to 40 / 60. Claim 45 A package according to claim 43 or 44, wherein the melt flow rate of the thermoplastic resin is 0.2 to 10.0 g / 10 min. Claim 46 A packaging body according to claim 37 or 44, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids. Claim 47 A packaging body according to claim 37 or 44, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has an amino group. Claim 48 A packaging body according to any one of claims 36, 37, 43 and 44, wherein the inner layer film comprises an odor non-adsorbent layer on one or both sides of the odor adsorbent layer, and the odor non-adsorbent layer comprises low-leaching polyethylene and is a layer that does not include the odor adsorbent. Claim 49 A packaging in which, in any one of paragraphs 36, 37, 43 and 44, the outer layer film additionally comprises a substrate layer. Claim 50 A liquid contents package for BIB comprising a package described in any one of paragraphs 36, 37, 43 and 44. Claim 51 Packaging material constituting the packaging body described in any one of paragraphs 36, 37, 43, and 44. Claim 52 A packaging body comprising a double pocket portion including at least an outer layer film and an inner layer film, and a contents extraction port including a resin molded article, wherein the outer layer film and the inner layer film are only partially bonded to each other, and each of the outer layer film and the inner layer film includes a sealant layer, and the sealant layer includes an odor adsorption layer, and the odor adsorption layer contains low-leaching polyethylene and an odor adsorbent, and the contents extraction port contains a polyolefin-based resin and the odor adsorbent, wherein the low-leaching polyethylene has a leaching TOC concentration of 1.5 ppm or more and 250 ppm or less contained in a film made solely of the low-leaching polyethylene, and the leaching TOC concentration is standardized by the JIS K 0805 Organic Carbon (TOC) Automatic Counter, and the odor adsorbent includes a hydrophobic zeolite, and the hydrophobic zeolite has an SiO2 / Al2O3 molar ratio of 30 / 1 to 8000 / 1, and the hydrophobic zeolite within the sealant layer A package containing 0.1 mass% or more and 13 mass% or less. Claim 53 A packaging body according to claim 52, wherein the odor adsorbent further comprises a chemical adsorbent-supported inorganic porous body, and the content of the chemical adsorbent-supported inorganic porous body within the sealant layer is 0.1 mass% or more and 10 mass% or less. Claim 54 A packaging body according to claim 52 or 53, wherein the content of the hydrophobic zeolite in the contents extraction port is 0.1 mass% or more and 13 mass% or less. Claim 55 A packaging body according to claim 52 or 53, wherein the odor adsorbent further comprises a chemical adsorbent-supported inorganic porous body, and the content of the chemical adsorbent-supported inorganic porous body within the contents extraction port is 0.1 mass% or more and 10 mass% or less. Claim 56 A packaging body according to claim 52 or 53, wherein the density of the low-leaching polyethylene is 0.90 g / cm³ or more and 0.94 g / cm³ or less. Claim 57 A packaging body in which the low-release polyethylene of claim 52 or 53 is LLDPE. Claim 58 A packaging body according to claim 52 or 53, wherein the low-leaching polyethylene is one or more types selected from the group consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE. Claim 59 In claim 52 or 53, the low-release polyethylene is a packaging material in which the number of pinholes occurring after 5,000 cycles of Gelboplex at 23°C of a 50 μm thick film made solely of the low-release polyethylene is 0 or 1 or more and 160 or less. Claim 60 delete Claim 61 In claim 52, the above hydrophobic zeolite is a packaging body in which the hydrophobic zeolite is melt-kneaded with a thermoplastic resin in a ratio of 0.5 / 99.5 to 40 / 60 mass ratio of hydrophobic zeolite to thermoplastic resin. Claim 62 In paragraph 53, the chemical adsorbent-supported inorganic porous body is a packaging body that has been melt-kneaded with a thermoplastic resin in advance at a ratio of chemical adsorbent-supported inorganic porous body / thermoplastic resin of 0.5 / 99.5 to 40 / 60. Claim 63 A package according to claim 61 or 62, wherein the melt flow rate of the thermoplastic resin is 0.2 to 10.0 g / 10 min. Claim 64 A packaging body according to claim 53 or 62, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has a functional group that is reactive with one or more types selected from the group consisting of aldehydes, ketones, and carboxylic acids. Claim 65 A packaging body according to claim 53 or 62, wherein the chemical adsorbent constituting the chemical adsorbent-supported inorganic porous body has an amino group. Claim 66 A packaging body according to any one of claims 52, 53, 61 and 62, wherein the outer layer film or the inner layer film, or both, comprises an odor non-adsorbent layer on one or both sides of the odor adsorbent layer, and the odor non-adsorbent layer comprises low-leaching polyethylene and is a layer not comprising the odor adsorbent. Claim 67 A packaging in which, in any one of paragraphs 52, 53, 61 and 62, the outer layer film additionally comprises a substrate layer. Claim 68 A liquid contents package for BIB comprising a package described in any one of paragraphs 52, 53, 61 and 62. Claim 69 Packaging material constituting the packaging body described in any one of paragraphs 52, 53, 61 and 62.

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