Deodorizing packaging

Abstract

To provide a deodorant package which has excellent manufacturing suitability, which, in the case where the content to be packaged in a package is food or medical product, prevents odorous components generated by hydrolysis from causing strange taste and strange odor of the content, which imparts odor improvement effect, and which prevents the odor component from filling in the package and causing the feeling of foreign odor when opened, and which, in the case where the content is an electrical component, an electronic apparatus, an industrial material, and the like that are moisture-reluctant, prevents deterioration, and which has an excellent anti-deterioration property by moisture and odor and taste variability for a long time.SOLUTION: In a deodorant package, a deodorant sealant film including a base material layer 1 and a specific deodorant sealant layer, and a hydrolysis suppression sealant film including a base material layer 2 and a specific hydrolysis suppression sealant layer are arranged so that the deodorant sealant layer and the hydrolysis suppression sealant layer oppose to each other, and an end part is sealed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a deodorizing package that prevents the contents packed in the package from developing an off-flavor or an off-odor, prevents the odorous components from filling the package and causing an unpleasant odor when opened, prevents the contents from being affected by moisture, and has excellent resistance to long-term odor and taste changes and moisture deterioration of the contents. [Background technology]

[0002] Packaging materials containing odor adsorbents that adsorb odors have been proposed (Patent Document 1). In such packaging materials, odor adsorbents such as synthetic zeolite and activated carbon are kneaded into the resin material. However, such packaging materials have the problem that they absorb not only odors but also moisture from the atmosphere, and once absorbed, the odors are released, so they do not provide a sufficient odor absorption effect.

[0003] Packaging materials containing odor adsorbents made by supporting a chemical adsorbent on an inorganic porous material are also known (Patent Document 2), but the main adsorption target is only odor components with specific functional groups. If the resin material is not selected appropriately, the amount of organic matter without functional groups generated cannot be suppressed, and odor components cannot be sufficiently adsorbed.

[0004] Furthermore, a hygroscopic packaging material that suppresses the generation of unpleasant odors due to hydrolysis of the contents is also known (Patent Document 3). However, although it has the effect of suppressing odor generation, the generated odor components remain as they are, so it is not possible to obtain a sufficient odor improvement effect. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 2538487 [Patent Document 2] JP 2014-233408 A [Patent Document 3] Japanese Patent Application Laid-Open No. 2006-327690 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to solve the above-mentioned problems and to provide a deodorizing package that is easy to manufacture, and that, when the contents to be packaged are foods or pharmaceuticals, prevents odorous components generated by hydrolysis from causing the contents to taste or smell strange, thereby providing an odor-improving effect, prevents the odorous components from filling the package and causing an unpleasant odor when the package is opened, and, when the contents are electronic components, electronic devices, industrial materials, etc. that are sensitive to moisture, prevents deterioration, and has excellent long-term resistance to changes in odor and taste and resistance to deterioration due to moisture. [Means for solving the problem]

[0007] As a result of extensive investigations, the present inventors have found that the above-mentioned object can be achieved by a deodorizing package having a structure in which at least a deodorizing sealant film having a base layer and a deodorizing layer containing a specific deodorizer, and a hydrolysis-inhibiting sealant film having a base layer and a hydrolysis-inhibiting layer containing a specific hydrolysis inhibitor are stacked together, with the edges sealed.

[0008] That is, the present invention is characterized by the following points. 1. A deodorizing sealant film having a base layer 1 and a deodorizing sealant layer and a hydrolysis-inhibiting sealant film having a base layer 2 and a hydrolysis-inhibiting sealant layer are stacked together so that the deodorizing sealant layer and the hydrolysis-inhibiting sealant layer face each other, and the edges are sealed. A deodorizing package having a configuration, the deodorizing sealant layer contains a deodorizer and a deodorizer-dispersed resin, The deodorizer contains one or more compounds selected from the group consisting of a chemical odor adsorbent, a hydrophobic zeolite having a SiO2 / Al2O3 molar ratio of 30 / 1 to 10,000 / 1, and an odor-decomposing metal compound; the hydrolysis-inhibiting sealant layer contains a hydrolysis inhibitor and a hydrolysis inhibitor-dispersed resin, the hydrolysis inhibitor contains one or more selected from the group consisting of hygroscopic alkali metal compounds, hygroscopic alkaline earth metal compounds, and hydrophilic zeolites having a SiO / AlO molar ratio of 1 / 1 to 20 / 1; the content of the deodorizing agent in the deodorizing sealant layer is 0.5% by mass or more and 15% by mass or less, The deodorizing package is characterized in that the content of the hydrolysis inhibitor in the hydrolysis inhibiting sealant layer is 1% by mass or more and 50% by mass or less. 2. The deodorizing sealant film further has a gas barrier layer 1 between the substrate layer 1 and the deodorizing sealant layer, The hydrolysis-inhibiting sealant film further includes a gas barrier layer 2 between the substrate layer 2 and the hydrolysis-inhibiting sealant layer, The gas barrier layer 1 and / or the gas barrier layer 2 is one or more selected from the group consisting of a gas barrier resin coating film, a metal foil, a resin film with a metal vapor deposition layer, and a resin film with a metal oxide vapor deposition layer, The deodorizing package according to item 1 above. 3. The deodorant dispersion resin and / or the hydrolysis inhibitor dispersion resin is a polyolefin resin, 3. The deodorizing package according to 1 or 2 above. 4. The deodorizing sealant layer comprises a deodorizing layer and a heat seal layer 1; the deodorizing layer is a layer containing the deodorizer and the deodorizer-dispersed resin, The heat seal layer 1 does not contain the deodorant but contains a polyolefin resin, has heat sealability, and is the layer farthest from the base layer 1 and / or the layer closest to the base layer 1 in the deodorant sealant layer. The deodorizing package according to any one of 1 to 3 above. 5. The hydrolysis-inhibiting sealant layer comprises a hydrolysis-inhibiting layer and a heat-sealing layer 2; the hydrolysis-inhibiting layer contains the hydrolysis inhibitor and the hydrolysis-inhibiting agent-dispersed resin, The heat seal layer 2 does not contain the hydrolysis inhibitor, but contains a polyolefin resin, has heat sealability, and is the layer farthest from the base layer 2 and / or the layer closest to the base layer 2 in the hydrolysis inhibiting sealant layer. 5. The deodorizing package according to any one of 1 to 4 above. 6. The polyolefin resin has a density of 0.90 g / cm 3 More than 0.94g / cm 3 The following LDPE and / or LLDPE, 6. The deodorizing package according to any one of 3 to 5 above. 7. A deodorizing packaging bag, characterized by being produced using the deodorizing packaging material described in any one of 1 to 6 above. 8. A deodorizing pouch bag, characterized by being produced using the deodorizing packaging material described in any one of 1 to 7 above. 9. A deodorizing sealant film, characterized by being used to prepare the deodorizing packaging described in any one of 1 to 6 above. 10. A hydrolysis-suppressing sealant film, characterized by being used for producing the deodorizing packaging material described in any one of 1 to 6 above. [Effects of the Invention]

[0009] The gas-adsorbing package of the present invention is highly manufacturable and prevents the contents packed in the package from deteriorating due to moisture and from causing odorous components generated by hydrolysis to change the taste or odor of the contents.When the contents are food or pharmaceuticals, it has an odor-improving effect and prevents the odorous components from filling the package and causing an unpleasant odor when opened.When the contents are electronic components, electronic devices, industrial materials, etc. that do not like moisture, it can prevent deterioration. Furthermore, since the odor and moisture once adsorbed are difficult to desorb and are adsorbed efficiently, it is possible to provide a deodorizing package that exhibits high moisture absorption and deodorizing effects for a long period of time. Therefore, the deodorizing package of the present invention is suitable for use as a package for dried foods, medicines, medical supplies, electronic parts that are sensitive to moisture, electronic equipment, and industrial materials. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic external view showing an example of a deodorizing package of the present invention. [Figure 2] 1 is a schematic cross-sectional view showing an example of the layer structure of the deodorizing package of the present invention. [Figure 3] FIG. 2 is a schematic cross-sectional view showing another example of the layer structure of the deodorizing package of the present invention. [Figure 4] 1 is a schematic diagram illustrating the odor adsorption mechanism of a chemical odor adsorbent-supporting inorganic porous material according to the present invention.

[0011] In each drawing, the size and proportions of the components may be changed or exaggerated for ease of understanding. Also, for clarity, parts that are unnecessary for explanation or repeated reference numerals may be omitted. Furthermore, in each drawing, the uneven portion is illustrated as a pattern having clear corners, but the corners may be rounded. DETAILED DESCRIPTION OF THE INVENTION

[0012] The deodorizing package of the present invention will be described in more detail below. Specific examples will be given, but the present invention is not limited thereto.

[0013] <Layer structure of deodorizing packaging> The deodorizing package of the present invention is configured such that a deodorizing sealant film and a hydrolysis-inhibiting sealant film are superimposed and the edges are sealed. When the films are laminated, the deodorizing sealant layer of the deodorizing sealant film and the hydrolysis inhibiting sealant layer of the hydrolysis inhibiting sealant film are laminated so as to face each other and come into contact with each other.

[0014] <Deodorizing sealant film> The deodorizing sealant film has a base layer 1 and a deodorizing sealant layer containing a deodorizing agent and a polyolefin resin. Moreover, the deodorizing sealant film preferably further comprises a gas barrier layer 1 between the substrate layer 1 and the deodorizing sealant layer.

[0015] [Base material layer 1] The base layer 1 is preferably a resin film, and may be composed of a single layer or a multi-layer structure including two or more resin films having the same or different compositions. In addition, to improve adhesion, an adhesive layer may be provided between each layer constituting the base layer 1 or between other layers, or a desired surface treatment layer may be provided in advance on the surface of each layer, if necessary. For example, a corona-treated layer, an ozone-treated layer, a plasma-treated layer, an oxidation-treated layer, or the like can be formed by optionally carrying out pretreatment such as corona discharge treatment, ozone treatment, low-temperature plasma treatment using oxygen gas or nitrogen gas, glow discharge treatment, or oxidation treatment using chemicals. Alternatively, various coating layers such as a primer coating layer, an undercoating layer, an anchor coating layer, an adhesive layer, and a vapor-deposited anchor coating layer may be optionally formed on the surface to form a surface treatment layer.

[0016] The various coating agent layers described above can be made of resin compositions containing, as the main component of the vehicle, for example, polyester resins, polyamide resins, polyurethane resins, epoxy resins, phenol resins, (meth)acrylic resins, polyvinyl acetate resins, polyolefin resins such as polyethylene or polypropylene, or copolymers or modified resins thereof, or cellulose resins.

[0017] The thickness of the base layer 1 varies depending on the material, but in the case of a resin film, it is preferably 5 to 30 μm, more preferably 10 to 30 μm. The resin film used for the base layer 1 can be a film of a thermoplastic resin, and is preferably a thermoplastic resin that has excellent chemical and physical strength, can withstand the conditions for forming a metal oxide vapor deposition film, and can well maintain the properties of the metal oxide vapor deposition film without impairing them.

[0018] Examples of such resins include polyolefin resins such as polyethylene resins and polypropylene resins, cyclic polyolefin resins, polystyrene resins, acrylonitrile-styrene copolymers (AS resins), acrylonitrile-butadiene-styrene copolymers (ABS resins), poly(meth)acrylic resins, polycarbonate resins, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins such as various nylons, polyurethane resins, acetal resins, and cellulose resins. In the present invention, the resin is preferably a polyester resin, a polyamide resin, or a polyolefin resin, and particularly preferably polyethylene terephthalate (PET), nylon, or polypropylene (PP).

[0019] In the present invention, the thermoplastic resin used for the base layer 1 can be formed into a film by various known and commonly used film-forming methods. For example, a method of forming a film using one type of resin by a film-forming method such as extrusion, cast molding, T-die method, cutting method, or inflation method, a method of forming a multilayer film by co-extrusion using two or more types of resins, a method of mixing two or more types of resins before film formation and forming a film by the above-mentioned film-forming method, etc. Furthermore, a film can be uniaxially or biaxially stretched using a tenter system, tubular system, etc.

[0020] Alternatively, one or more resins may be coated on another resin film by applying and drying, or a molten resin may be laminated by a T-die method or the like. In the present invention, the resin film is preferably a biaxially oriented PET film, a biaxially oriented nylon film, or a biaxially oriented PP film or sheet.

[0021] During the film formation process, various plastic compounding agents and additives can be added to the resin film for the purpose of improving or modifying, for example, the processability, heat resistance, weather resistance, mechanical properties, dimensional stability, oxidation resistance, slipperiness, release properties, flame retardancy, mildew resistance, electrical properties, strength, etc. of the film. The amount of these additives can range from a very small amount to several tens of percent, and can be added in any amount depending on the purpose. In the above, examples of common additives that can be used include lubricants, crosslinking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, pigments, modifying resins, and the like.

[0022] [Gas barrier layer 1] The gas barrier layer 1 is a layer that prevents water vapor, oxygen, etc. from penetrating from the outside to the inside of the deodorizing package of the present invention and further to the contents, and can prevent the generation of odorous substances due to hydrolysis or oxidation of the contents and deterioration due to moisture. The gas barrier layer 1 can be made of one or more materials selected from the group consisting of a gas barrier resin coating, a metal foil, a resin film with a metal vapor deposition layer, and a resin film with a metal oxide vapor deposition layer. As the gas barrier resin coating film, a coating film containing a sol-gel hydrolysis polycondensate formed from a metal alkoxide and a water-soluble polymer is preferred, as the metal foil, aluminum foil is preferred, as the resin film with a metal vapor deposition layer, a resin film with an aluminum vapor deposition film is preferred, and as the resin film with a metal oxide vapor deposition layer, a resin film with an aluminum oxide vapor deposition film is preferred.

[0023] Commercially available resin films with an aluminum oxide vapor-deposited film include, for example, alumina-deposited IB-PET-PIR (thickness: 12 μm) and silica-deposited IB-ON-UB (thickness: 15 μm), both manufactured by Dai Nippon Printing Co., Ltd., which are PET films with alumina vapor-deposited on one side by the PVD method.

[0024] The metal foil, resin film with a metal vapor deposition layer, or resin film with a metal oxide vapor deposition layer for the gas barrier layer 1 can be bonded to other layers using a dry lamination adhesive. Alternatively, the resin film for the base layer 1 may be used as the resin film for the resin film with a metal vapor deposition layer or a resin film with a metal oxide vapor deposition layer, and lamination onto the base layer 1 may be omitted.

[0025] [Deodorizing sealant layer] The deodorizing sealant layer contains a deodorizing agent and a deodorizing agent-dispersed resin, is the outermost layer of the deodorizing sealant film, and is a layer that has heat-sealing properties.In the package, its edges are joined to the edges of the hydrolysis-inhibiting sealant layer of the hydrolysis-inhibiting sealant film by heat sealing, making it the layer that comes into contact with the contents. The deodorizing sealant layer may be a single layer containing a deodorizer and a deodorizer-dispersed resin, or may be a multi-layer structure of two or more layers, such as a deodorizing layer containing a deodorizer and a heat seal layer 1 containing a deodorizer-dispersed resin but not a deodorizer. That is, the deodorizing sealant layer can have a configuration of deodorizing layer, heat seal layer 1 / deodorizing layer, deodorizing layer / heat seal layer 1, heat seal layer 1 / deodorizing layer / heat seal layer 1, or the like. The deodorizing layer may or may not have heat sealing properties, but if the deodorizing layer does not have sufficient heat sealing properties, it is preferable that the heat sealing layer 1 having heat sealing properties be the layer farthest from the base layer 1 and / or the layer closest to the base layer 1 in order to improve the heat sealing with other layers other than the deodorizing sealant layer.

[0026] In the present invention, the deodorizing layer is also referred to as both the deodorizing sealant layer when the deodorizing sealant layer is composed of a single layer, and the layer containing the deodorizer when the deodorizing sealant layer is composed of multiple layers. The deodorizing sealant layer may further contain lubricants, antioxidants, antiblocking agents, and other additives.

[0027] (Deodorant dispersion resin) The deodorant-dispersing resin is a resin that has excellent deodorant dispersibility, but if good heat-sealing properties and deodorant dispersibility are desired, a polyolefin-based resin is preferred. Specific examples of polyolefin resins include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), and Examples of low-elution polyethylene include 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 methacrylic acid copolymer, ethylene-propylene copolymer, and mixtures of these resins. Among the above, polyethylene-based resins are preferred, and among polyethylene-based resins, LDPE and / or LLDPE are more preferred, and the density is 0.90 g / cm 3 More than 0.94g / cm 3 The following LDPE and / or LLDPE are more preferred:

[0028] (Deodorant) The deodorizer is a compound that has the effect of deodorizing the contents themselves and odorous substances produced by hydrolysis of the contents. The deodorant may be one or more selected from the group consisting of chemical odor adsorbents, hydrophobic zeolites with a SiO2 / Al2O3 molar ratio of 30 / 1 to 10000 / 1, and odor-decomposing metal compounds. The content of the deodorizing agent in the deodorizing sealant layer is preferably 0.5% by mass or more and 15% by mass or less, and more preferably 0.8% by mass or more and 15% by mass or less. If the content is less than the above range, the deodorizing effect is difficult to exhibit, and if the content is more than the above range, film formability is likely to deteriorate.

[0029] A chemical odor adsorbent is a compound that has reactive functional groups that chemically react with and bond to the contents themselves and odorous substances produced by hydrolysis of the contents. For example, it is a compound that has reactive functional groups that bond with aldehydes, ketones, carboxylic acids, etc. Examples of such compounds include amino group-containing compounds, carboxyl group-containing compounds, hydroxyl group-containing compounds, carbonates, and hydrogen carbonates.

[0030] Specific examples of the amino group-containing compound include alkylamines such as ethylenediamine, diethylenetriamine, and triethylenetriamine, phenylamines such as metaphenylenediamine, polyamines such as tetramethylenediamine and tetraethylenepentamine, ethanolamine, piperazine, and piperidine. A specific example of the carboxyl group-containing compound is 2-acrylamido-2-methylpropanesulfonic acid. Specific examples of the hydroxyl group-containing compound include metal hydroxides such as sodium hydroxide, potassium hydroxide, magnesium hydroxide, and iron hydroxide. Specific examples of carbonates include metal carbonates such as sodium carbonate and calcium carbonate. Specific examples of hydrogen carbonates include metal hydrogen carbonates such as sodium hydrogen carbonate. The chemical odor adsorbent can also be supported on an inorganic porous material and used as a chemical odor adsorbent-supported inorganic porous material.

[0031] The adsorption mechanism of the chemical odor adsorbent for odorous substances will be explained in more detail using the specific examples shown in Figures 4(a) and 4(b), but the present invention is not limited to these. In Figures 4(a) and 4(b), the chemical odor adsorbent is used by being supported on, for example, an inorganic porous material. For example, if the odorant is a carboxylic acid-based odorant, a compound with a hydroxyl group can be used as the chemical odor adsorbent, as shown in Figure 4(a). This causes a chemical reaction between the carboxyl group and the hydroxyl group, resulting in bonding and adsorption of the odorant. Furthermore, when the odorous substance is an aldehyde, a compound having an amino group can be used as the chemical odor adsorbent, as shown in Figure 4(b). This causes a chemical reaction between the aldehyde group and the amino group, resulting in a bond and adsorption of the odorous substance.

[0032] In this case, since the adsorption of odorous substances is chemical adsorption, the odorous substances once adsorbed do not desorb, and odor adsorption can be carried out efficiently. Furthermore, unlike physical adsorbents in which odors and water vapor are adsorbed at the same adsorption site, the chemical odor adsorbent of the present invention binds odorous substances to specific functional groups of the chemical odor adsorbent, and is therefore less susceptible to the effects of various substances that reduce odor adsorption capacity, such as water vapor.

[0033] The SiO2 / Al2O3 molar ratio of the hydrophobic zeolite is preferably 30 / 1 to 10,000 / 1, more preferably 35 / 1 to 9,000 / 1, and even more preferably 40 / 1 to 8,500 / 1. Generally, the higher the SiO2 / Al2O3 molar ratio of zeolite, the more hydrophobic the zeolite becomes. This increased hydrophobicity makes it more difficult for the zeolite to adsorb highly polar molecules such as water molecules, while increasing its affinity for less polar odorous substances, hydrophobic gases, and lipophilic gases (including solvent-based gases), making it easier to adsorb these substances. Furthermore, due to the effects of alkali metals and alkaline earth metals such as Ca, Na, and K present on the zeolite surface, the zeolite surface exhibits basicity, making it easier for acidic gases to be adsorbed through a neutralization reaction. In the present invention, a hydrophobic zeolite having a molar ratio within the above range is preferably used in view of the balance between the ability to adsorb odorous substances and ease of availability. In addition, hydrophobic zeolite has high heat resistance and can maintain its odorous substance adsorption effect even when exposed to high temperatures of 230°C or higher.

[0034] The shape of the hydrophobic zeolite may be any external shape such as a sphere, a rod, an ellipse, or the like, and may be in any form such as a powder, a lump, or a granule. However, from the viewpoints of uniform dispersibility, kneading properties, film-forming properties, and the like when dispersed in a resin, a powder form is preferred. In the present invention, the average particle size of the hydrophobic zeolite can be selected appropriately depending on the application, but the average particle size is preferably 0.01 μm to 10 μm. Here, the average particle size is a value measured by dynamic light scattering. If the average particle size is smaller than 0.01 μm, the hydrophobic zeolite tends to aggregate and the dispersibility tends to decrease, whereas if the average particle size is larger than 10 μm, the film-forming properties of the layer containing the hydrophobic zeolite tend to be poor, making it difficult to add a large amount of hydrophobic zeolite, and furthermore, the surface area is reduced, which may result in insufficient deodorizing effect.

[0035] The odor-decomposing metal compound is a metal compound that has the ability to chemically decompose odorous substances. The odor-decomposing metal compound exerts a deodorizing effect by ionizing the metal atoms held in the odor-decomposing metal compound and exerting a catalytic action that promotes the decomposition reaction of odorous substances. Odor-decomposing metal compounds also have a high deodorizing effect on sulfur-based odorous substances.

[0036] The odor-decomposing metal compound is preferably an oxide and / or salt of one or more elements selected from the group consisting of Cu, Zn, Ag, Pt, Au, Fe, and alkali metals. Examples of metal oxides include CuO, Cu2O, ZnO, Ag2O, PtO2, Au2O3, FeO, Fe3O4, Fe2O3, CoO, Co2O3, Co3O4, etc. Among these, CuO (copper (II) oxide) and ZnO are preferred.

[0037] Furthermore, the odor-decomposing metal compound can also be formed from an odor-decomposing metal compound composition containing silicon oxide (SiO2), alkali metal oxide, alkaline earth metal oxide, boron oxide, aluminum oxide (Al2O3), etc. By including these, it becomes easier to prepare the odor-decomposing metal compound, the dispersibility of the odor-decomposing metal compound improves, ionization can be easily controlled, the deodorizing effect is enhanced, and furthermore, the chemical durability of the odor-decomposing metal compound is improved. The water resistance is improved, metal deposition is suppressed, and the deodorizing effect can be easily maintained. The powdered odor-decomposing metal compound can be obtained by mixing the raw materials to prepare an odor-decomposing metal compound composition, melting and homogenizing it in a conventional manner similar to that used to prepare general-purpose glass such as bottle glass, and then cooling and pulverizing the mixture.

[0038] Odor-decomposing metal compounds act as catalysts to promote the decomposition reaction of odorous substances, thereby increasing the deodorizing capacity compared to methods that rely on surface area through chemical adsorption or physical adsorption, and enabling the deodorizing effect to be stably exerted over a long period of time.

[0039] The alkaline earth metal oxide is one or more selected from the group consisting of MgO, CaO, SrO, and BaO, and is a component that is contained in the odor-decomposing metal compound composition as needed, and has the effect of improving the chemical durability of the odor-decomposing metal compound. When an alkaline earth metal oxide is contained in the odor-decomposing metal compound composition, the content of the alkaline earth metal oxide in the odor-decomposing metal compound composition is preferably 2 to 10 mol %, more preferably 2 to 7 mol %. If the content is less than the above range, it tends to be difficult to fully exert the effect of containing the alkaline earth metal oxide, and if it is more than the above range, the melting point and melt viscosity of the odor-decomposing metal compound tend to be too high, resulting in heterogeneity.

[0040] The particle size distribution of the odor-decomposing metal compound is such that the weight average particle size is 1 μm or more and 30 μm or less, and D 96 Here, the average particle size is a value measured by measuring particle size distribution by dynamic light scattering, and D 96 means the particle size at which the integral value of the cumulative distribution corresponds to 96 mass %. If the average particle size is smaller than 1 μm, the odor-decomposing metal compound is likely to aggregate, and its dispersibility in the sealant layer tends to decrease. If the average particle size is larger than 30 μm, the film-forming properties of the sealant layer tend to be poor, making it difficult to add a large amount of the odor-decomposing metal compound, and the surface area also decreases, making it difficult to achieve a sufficient deodorizing effect. D 96If the particle size exceeds 40 μm, it may become difficult to uniformly disperse the particles in the resin, which may result in a decrease in film formability. The odor-decomposing metal compound can also be used by being mixed with or supported on an inorganic substance.

[0041] (How to Disperse Deodorant) As a method for dispersing the deodorant in the deodorant dispersion resin, a known or commonly used kneading method can be applied. It is also possible to directly mix and knead the deodorant with the deodorant-dispersed resin, or to use the so-called masterbatch method in which the deodorant is mixed at a high concentration with a thermoplastic resin and then melt-kneaded (melt-blended) to prepare a masterbatch, which is then mixed and melt-kneaded with the deodorant-dispersed resin for the deodorant layer in a ratio corresponding to the target content. In the case of the masterbatch method, even a combination of a deodorant and a resin, which is prone to aggregation, can be dispersed efficiently and uniformly.

[0042] The content of the deodorant in the masterbatch is preferably 0.5% by mass or more and 40% by mass or less, and more preferably 1% by mass or more and 20% by mass or less. If it is less than the above range, the degree of freedom in the content of the deodorant or hydrolysis inhibitor in the layer tends to be small, and if it is more than the above range, it tends to be difficult to obtain excellent dispersibility.

[0043] Examples of thermoplastic resins used in the masterbatch include general-purpose polyethylene, polypropylene, methylpentene polymer, polyolefin resins such as acid-modified polyolefin resins, and mixtures of these resins, but are not limited to these resins. In this case, the thermoplastic resin in the master batch was the same as the deodorant dispersion resin in the deodorant layer. Depending on the purpose, different types of resins can be combined within a range that does not significantly adversely affect the heat sealability or film formability of the deodorizing layer. For example, if the same resin as the deodorant-dispersed resin in the deodorant layer is used in the master batch, the deodorant layer is likely to be homogeneous, and good film-forming properties, heat-sealing properties, interlayer adhesive strength, and deodorizing properties can be efficiently obtained.

[0044] (Method for forming and laminating deodorizing sealant layers) In the present invention, the film-forming and laminating methods for the deodorizing sealant layer or each layer constituting the deodorizing sealant layer are not particularly limited, and known or commonly used film-forming and laminating methods can be applied. The deodorizing sealant layer, or deodorizing layer or heat seal layer 1 can be laminated on other layers by extrusion or co-extrusion using an extrusion coating method, or can be laminated via an adhesive layer after film formation using an inflation method or casting method. Even in the case of the extrusion coating method, lamination via an adhesive layer may be performed as needed. Alternatively, pre-formed films for the deodorizing sealant layer, deodorizing layer, and heat seal layer 1 may be laminated and bonded via an adhesive layer laminated by extrusion coating, dry lamination, non-solvent lamination, etc.

[0045] When laminating by the extrusion coating method, first, the resin composition that forms the deodorizing sealant layer, deodorizing layer, heat seal layer 1, etc. is heated and melted, and then expanded and stretched in the required width direction using a T-die to be (co)extruded in a curtain shape. The molten resin is then caused to flow down onto the surface to be laminated and sandwiched between a rubber roll and a cooled metal roll, thereby simultaneously forming the deodorizing sealant layer, deodorizing layer, heat seal layer 1, etc., and laminating and adhering them to the surface to be laminated, and laminating and adhering between the deodorizing layer and heat seal layer 1, etc. When laminating by extrusion coating, the melt flow rate (MFR) of the resin component contained in the deodorizing sealant layer, deodorizing layer, and heat seal layer 1 is preferably 0.2 to 50 g / 10 min, more preferably 0.5 to 30 g / 10 min. In this specification, MFR is a value measured by a method in accordance with JIS K7210. If the MFR is less than 0.2 g / 10 min or more than 50 g / 10 min, the processability tends to be poor.

[0046] When an inflation method is used, the melt flow rate (MFR) of the resin component contained in the deodorizing sealant layer, deodorizing layer and heat seal layer 1 is preferably 0.2 to 10 g / 10 min, more preferably 0.2 to 9.5 g / 10 min. If the MFR is less than 0.2 g / 10 min or more than 10 g / 10 min, the processability tends to be poor.

[0047] <Hydrolysis-suppressing sealant film> The hydrolysis-inhibiting sealant film has a substrate layer 2 and a hydrolysis-inhibiting sealant layer containing a hydrolysis inhibitor and a hydrolysis inhibitor-dispersed resin. Preferably, the hydrolysis-inhibiting sealant film further comprises a gas barrier layer 2 between the substrate layer 2 and the hydrolysis-inhibiting sealant layer.

[0048] [Base material layer 2] The configuration of the substrate layer 2 of the hydrolysis-inhibiting sealant film may be the same as or different from the configuration of the substrate layer 1 of the deodorizing sealant film.

[0049] The base layer 2 is preferably a resin film, and may be composed of a single layer or a multi-layer structure including two or more resin films having the same or different compositions. In addition, in order to improve adhesion between the layers constituting the base layer 2 or between other layers, An adhesive layer may be provided, and a desired surface treatment layer may be provided in advance on the surface of each layer, if necessary.

[0050] For example, a corona-treated layer, an ozone-treated layer, a plasma-treated layer, an oxidation-treated layer, or the like can be formed by optionally carrying out pretreatment such as corona discharge treatment, ozone treatment, low-temperature plasma treatment using oxygen gas or nitrogen gas, glow discharge treatment, or oxidation treatment using chemicals. Alternatively, various coating layers such as a primer coating layer, an undercoating layer, an anchor coating layer, an adhesive layer, and a vapor-deposited anchor coating layer may be optionally formed on the surface to form a surface treatment layer. The various coating agent layers described above can be made of resin compositions containing, as the main component of the vehicle, for example, polyester resins, polyamide resins, polyurethane resins, epoxy resins, phenol resins, (meth)acrylic resins, polyvinyl acetate resins, polyolefin resins such as polyethylene or polypropylene, or copolymers or modified resins thereof, or cellulose resins.

[0051] The thickness of the base layer 2 varies depending on the material, but in the case of a resin film, it is preferably 5 to 30 μm, more preferably 10 to 30 μm. The resin film used for the base layer 2 can be a film of a thermoplastic resin, and is preferably a thermoplastic resin that has excellent chemical and physical strength, can withstand the conditions for forming a metal oxide vapor deposition film, and can well maintain the properties of the metal oxide vapor deposition film without impairing them.

[0052] Examples of such resins include polyolefin resins such as polyethylene resins and polypropylene resins, cyclic polyolefin resins, polystyrene resins, acrylonitrile-styrene copolymers (AS resins), acrylonitrile-butadiene-styrene copolymers (ABS resins), poly(meth)acrylic resins, polycarbonate resins, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins such as various nylons, polyurethane resins, acetal resins, and cellulose resins. In the present invention, the resin is preferably a polyester resin, a polyamide resin, or a polyolefin resin, and particularly preferably polyethylene terephthalate (PET), nylon, or polypropylene (PP).

[0053] In the present invention, the thermoplastic resin used for the base layer 2 can be formed into a film by various known and commonly used film-forming methods. For example, a method of forming a film using one type of resin by a film-forming method such as extrusion, cast molding, T-die method, cutting method, or inflation method, a method of forming a multilayer film by co-extrusion using two or more types of resins, a method of mixing two or more types of resins before film formation and forming a film by the above-mentioned film-forming method, etc. Furthermore, a film can be uniaxially or biaxially stretched using a tenter system, tubular system, etc.

[0054] Alternatively, one or more resins may be coated on another resin film by applying and drying, or a molten resin may be laminated by a T-die method or the like. In the present invention, the resin film is preferably a biaxially oriented PET film, a biaxially oriented nylon film, or a biaxially oriented PP film or sheet.

[0055] In addition, when forming the resin film, various plastic compounding agents and additives may be added to improve or modify the processability, heat resistance, weather resistance, mechanical properties, dimensional stability, anti-oxidation properties, slip properties, release properties, flame retardancy, anti-fungal properties, electrical properties, strength, etc. of the film. The amount of the additive can be any amount ranging from a very small amount to several tens of percent depending on the purpose. In the above, examples of common additives that can be used include lubricants, crosslinking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, pigments, modifying resins, and the like.

[0056] [Gas barrier layer 2] The configuration of the gas barrier layer 2 of the hydrolysis-suppressing sealant film may be the same as or different from the configuration of the gas barrier layer 1 of the deodorizing sealant film. The gas barrier layer 2 may be laminated by the same method as that for the gas barrier layer 1, or by a different method.

[0057] The gas barrier layer 2 is a layer that prevents water vapor, oxygen, etc. from penetrating from the outside to the inside of the deodorizing package of the present invention and further to the contents, and can prevent the generation of odorous substances due to hydrolysis or oxidation of the contents and deterioration due to moisture. The gas barrier layer 2 can be made of one or more materials selected from the group consisting of a gas barrier resin coating, a metal foil, a resin film with a metal vapor deposition layer, and a resin film with a metal oxide vapor deposition layer. As the gas barrier resin coating film, a coating film containing a sol-gel hydrolysis polycondensate formed from a metal alkoxide and a water-soluble polymer is preferred, as the metal foil, aluminum foil is preferred, as the resin film with a metal vapor deposition layer, a resin film with an aluminum vapor deposition film is preferred, and as the resin film with a metal oxide vapor deposition layer, a resin film with an aluminum oxide vapor deposition film is preferred.

[0058] Commercially available resin films with an aluminum oxide vapor-deposited film include, for example, alumina-deposited IB-PET-PIR (thickness: 12 μm) and silica-deposited IB-ON-UB (thickness: 15 μm), both manufactured by Dai Nippon Printing Co., Ltd., which are PET films with alumina vapor-deposited on one side by the PVD method.

[0059] The metal foil, resin film with a metal vapor deposition layer, or resin film with a metal oxide vapor deposition layer for the gas barrier layer 2 can be bonded to other layers using a dry lamination adhesive. Alternatively, a resin film for the base layer 2 may be used for the resin film with a metal vapor deposition layer or a resin film with a metal oxide vapor deposition layer, and lamination onto the base layer 2 may be omitted.

[0060] [Hydrolysis-inhibiting sealant layer] The hydrolysis-inhibiting sealant layer contains a hydrolysis inhibitor and a hydrolysis inhibitor-dispersed resin, is the outermost layer of the hydrolysis-inhibiting sealant film, and is a layer that has heat-sealing properties. In the package, its edges are joined to the edges of the deodorizing sealant layer of the deodorizing sealant film by heat sealing, making it the layer that comes into contact with the contents. The hydrolysis-inhibiting sealant layer may be a single layer containing a hydrolysis inhibitor and a hydrolysis inhibitor-dispersed resin, or may be a multi-layer structure of two or more layers, such as a hydrolysis-inhibiting layer containing a hydrolysis inhibitor and a heat-seal layer 2 containing a hydrolysis inhibitor-dispersed resin but not a hydrolysis inhibitor. That is, the hydrolysis-inhibiting sealant layer can have a configuration such as hydrolysis-inhibiting layer, heat-sealing layer 2 / hydrolysis-inhibiting layer, hydrolysis-inhibiting layer / heat-sealing layer 2, or heat-sealing layer 2 / hydrolysis-inhibiting layer / heat-sealing layer 2.

[0061] The hydrolysis-inhibiting layer may or may not have heat-sealing properties. However, if the hydrolysis-inhibiting layer does not have sufficient heat-sealing properties, the hydrolysis-inhibiting sealant layer may be used. In order to improve the heat sealability with layers other than the base layer 2, the heat seal layer 2 having heat sealability is preferably the layer farthest from the base layer 2 and / or the layer closest to the base layer 2. In the present invention, the term "hydrolysis inhibiting layer" refers to both a hydrolysis inhibiting sealant layer when the hydrolysis inhibiting sealant layer is composed of a single layer, and a hydrolysis inhibiting layer when the hydrolysis inhibiting sealant layer is composed of multiple layers. Additionally, the hydrolysis inhibiting sealant layer may contain lubricants, antioxidants, antiblocking agents, and other additives.

[0062] (Hydrolysis inhibitor dispersion resin) The hydrolysis inhibitor dispersing resin is preferably a polyolefin resin in order to obtain good heat sealing properties and good dispersibility of the hydrolysis inhibitor. The hydrolysis inhibitor-dispersing resin may be the same as or different from the deodorant-dispersing resin. However, in order to obtain good heat-sealability between the deodorant sealant layer and the hydrolysis inhibitor sealant layer, it is preferable that the hydrolysis inhibitor-dispersing resin be the same as or of the same type as the deodorant-dispersing resin.

[0063] Specific examples of polyolefin resins 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 methacrylic acid copolymer, ethylene-propylene copolymer, and other low-leachable resins, as well as mixtures of these resins. Among the above, polyethylene-based resins are preferred, and among polyethylene-based resins, LDPE and / or LLDPE are more preferred, and the density is 0.90 g / cm 3 More than 0.94g / cm 3 The following LDPE and / or LLDPE are more preferred:

[0064] (hydrolysis inhibitor) A hydrolysis inhibitor is a hygroscopic compound that inhibits the hydrolysis of the contents. Because water is essential for the hydrolysis of the contents, the hydrolysis inhibitor absorbs moisture and reduces the amount of water, thereby inhibiting the progress of hydrolysis and suppressing the generation of odorous substances. Furthermore, in the case of contents that are sensitive to moisture, such as electronic components, electronic devices, and industrial materials, deterioration can be suppressed. The hydrolysis inhibitor may be one or more selected from the group consisting of hygroscopic alkali metal compounds, hygroscopic alkaline earth metal compounds, and hydrophilic zeolites.

[0065] The content of the hydrolysis inhibitor in the hydrolysis-inhibiting sealant layer is preferably 1% by mass or more and 50% by mass or less, and more preferably 5% by mass or more and 50% by mass or less. If the content is less than this range, the hydrolysis inhibitor effect is less likely to be exhibited, and if the content is more than this range, film formability is likely to deteriorate.

[0066] Specific examples of the hygroscopic alkali metal compound or hygroscopic alkaline earth metal compound include Li2O, Na2O, K2O, MgO, CaO, BaO, LiCl, and LiOH, and among these, MgO and CaO are more preferred.

[0067] The SiO2 / Al2O3 molar ratio of the hydrophilic zeolite is preferably from 1 / 1 to 20 / 1, more preferably from 1.5 / 1 to 10 / 1, and even more preferably from 2 / 1 to 5 / 1. Generally, the lower the SiO2 / Al2O3 molar ratio of zeolite, the more hydrophilic it becomes. This increased hydrophilicity makes it easier for zeolite to adsorb highly polar molecules such as water, but conversely, it has a lower affinity for less polar odorous substances, hydrophobic gases, and lipophilic gases (including solvent-based gases), making it more difficult for zeolite to adsorb these substances. In the present invention, a hydrophilic zeolite having a molar ratio within the above range is preferably used in view of the balance between moisture absorption performance and availability. Furthermore, hydrophilic zeolite has high heat resistance and can maintain its moisture absorption effect even when exposed to high temperatures of 230°C or higher, making it suitable for use in high-temperature lamination at 230°C or higher by extrusion.

[0068] The hydrolysis inhibitor may have any external shape, such as a spherical, rod-like, or elliptical shape, and may be in any form, such as a powder, a lump, or a granule. However, from the viewpoints of uniform dispersibility, kneading properties, film-forming properties, etc., when dispersed in a resin, a powder form is preferred. In the present invention, the average particle size of the hydrolysis inhibitor can be selected as appropriate 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. If the average particle size is smaller than 0.01 μm, the hydrolysis inhibitor is likely to aggregate and its dispersibility tends to decrease, whereas if the average particle size is larger than 10 μm, the film-forming properties of the layer containing the hydrolysis inhibitor tend to be poor, making it difficult to add a large amount of hydrolysis inhibitor, and furthermore, the surface area is reduced, which may result in insufficient moisture absorption effect.

[0069] (Method for dispersing hydrolysis inhibitor) As a method for dispersing the hydrolysis inhibitor in the hydrolysis inhibitor dispersion resin, a known or commonly used kneading method can be applied. The hydrolysis inhibitor can be directly mixed with the hydrolysis inhibitor-dispersed resin and kneaded together, or a masterbatch method can be used in which the hydrolysis inhibitor is mixed at a high concentration with a thermoplastic resin and then melt-kneaded (melt-blended) to prepare a masterbatch, which is then mixed with the hydrolysis inhibitor-dispersed resin for the hydrolysis inhibitor layer in a ratio corresponding to the target content, followed by melt-kneading. In the case of the masterbatch method, even a combination of a hydrolysis inhibitor and a hydrolysis inhibitor dispersion resin, which is prone to aggregation, can be dispersed efficiently and uniformly.

[0070] The content of the hygroscopic alkali metal compound in the masterbatch is preferably 0.5% by mass or more and 65% by mass or less, and more preferably 1% by mass or more and 60% by mass or less. The content of the hygroscopic alkaline earth metal compound in the masterbatch is preferably 0.5% by mass or more and 65% by mass or less, and more preferably 1% by mass or more and 60% by mass or less. The content of the hydrophilic zeolite in the masterbatch is preferably 0.5% by mass or more and 65% by mass or less, and more preferably 1% by mass or more and 60% by mass or less. If it is less than the above range, the degree of freedom in the content of the deodorant or hydrolysis inhibitor in the layer tends to be small, and if it is more than the above range, it tends to be difficult to obtain excellent dispersibility. Examples of thermoplastic resins used in the masterbatch include general-purpose polyethylene, polypropylene, methylpentene polymer, polyolefin resins such as acid-modified polyolefin resins, and mixtures of these resins, but are not limited to these resins.

[0071] In this case, the thermoplastic resin in the masterbatch may be the same as or different from the hydrolysis inhibitor-dispersed resin in the hydrolysis inhibitor layer, and different types of resins can be combined depending on the purpose, as long as they do not significantly affect the heat-sealing properties or film-forming properties of the hydrolysis inhibitor layer. For example, if the masterbatch contains the same resin as the hydrolysis inhibitor-dispersing resin in the hydrolysis inhibiting layer, the hydrolysis inhibiting layer is likely to be homogeneous, and good film-forming properties, heat-sealing properties, interlayer adhesive strength, and hydrolysis inhibiting properties can be efficiently obtained.

[0072] (Method for producing and laminating hydrolysis-inhibiting sealant layer) The hydrolysis-inhibiting sealant layer may be formed and laminated by the same method as that for the deodorizing sealant layer, or may be formed and laminated by a different method.

[0073] In the present invention, there are no particular limitations on the method for forming or laminating the hydrolysis-inhibiting sealant layer or each of the layers that make up the hydrolysis-inhibiting sealant layer, and any known or commonly used film-forming or laminating method can be used. The hydrolysis-inhibiting sealant layer, or the hydrolysis-inhibiting layer or heat-sealing layer 2 can be laminated onto another layer by extrusion or co-extrusion using an extrusion coating method, or can be laminated via an adhesive layer after film formation using an inflation method or casting method. Even in the case of extrusion coating, lamination via an adhesive layer may be performed as needed. Alternatively, pre-formed films for the hydrolysis-inhibiting sealant layer, hydrolysis-inhibiting layer, and heat-sealing layer 2 may be laminated and bonded via an adhesive layer formed by extrusion coating, dry lamination, non-solvent lamination, or the like.

[0074] When laminating by extrusion coating, first, the resin compositions that form the hydrolysis-inhibiting sealant layer, hydrolysis-inhibiting layer, heat-seal layer 2, etc. are heated and melted, and then expanded and stretched in the required width direction through a T-die to (co-)extrude in a curtain shape. The molten resin is then allowed to flow down onto the surface to be laminated and sandwiched between a rubber roll and a cooled metal roll, thereby simultaneously forming the hydrolysis-inhibiting sealant layer, hydrolysis-inhibiting layer, heat-seal layer 2, etc., and laminating and adhering the layer to the surface to be laminated and laminating and adhering the hydrolysis-inhibiting layer and heat-seal layer 2 together. When lamination is performed by extrusion coating, the melt flow rate (MFR) of the resin components contained in the hydrolysis-inhibiting sealant layer, the hydrolysis-inhibiting layer, and the heat-sealable layer 2 is preferably 0.2 to 50 g / 10 min, and more preferably 0.5 to 30 g / 10 min. In this specification, MFR is a value measured using a method in accordance with JIS K7210. If the MFR is less than 0.2 g / min or more than 50 g / min, the processability tends to be poor.

[0075] When an inflation method is used, the melt flow rate (MFR) of the resin components contained in the hydrolysis-inhibiting sealant layer, hydrolysis-inhibiting layer, and heat seal layer 2 is preferably 0.2 to 10 g / 10 min, more preferably 0.2 to 9.5 g / 10 min. If the MFR is less than 0.2 g / 10 min or more than 10 g / 10 min, the processability tends to be poor.

[0076] <Deodorizing packaging bag> The deodorizing packaging bag of the present invention is one embodiment of the deodorizing package of the present invention, which is made into a bag shape. A bag can be produced, for example, by overlapping the deodorizing sealant layer of the deodorizing sealant film and the hydrolysis-inhibiting sealant layer of the hydrolysis-inhibiting sealant film so that they face each other, and then heat-sealing the peripheral edges using a heat seal method such as a side seal type, two-sided seal type, three-sided seal type, four-sided seal type, envelope seal type, palm seal type (pillow seal type), pleated seal type, flat bottom seal type, square bottom seal type, or gusset seal type. As the heat sealing method, known methods such as bar sealing, rotary roll sealing, belt sealing, impulse sealing, high frequency sealing, ultrasonic sealing, etc. can be used.

[0077] <Deodorizing pouch bag> The deodorizing pouch bag of the present invention is one embodiment of the deodorizing packaging bag of the present invention, which is made into a pouch bag shape. [Example]

[0078] Details of the raw materials used in the examples are as follows. <Deodorant> [Chemical odor adsorbent-supported inorganic porous material] ·Kesmon NS-241: Manufactured by Toagosei Co., Ltd., inorganic porous material supporting an amino group-containing compound. Average particle size 3.5μm. Kesmon NS-80E: manufactured by Toagosei Co., Ltd., hydroxyl group-supported zirconium, average particle size 2 μm. [Hydrophobic zeolite] Mizuka Sieves EX-122: manufactured by Mizusawa Industrial Chemicals, Ltd. SiO2 / Al2O3 molar ratio = 32 / 1, average particle size 2.5 to 5.5 μm. Silton MT400: manufactured by Mizusawa Industrial Chemicals, Ltd. SiO2 / AL2O3 molar ratio = 400 / 1, average particle size 5-7 μm. Silton MT-8000: manufactured by Mizusawa Industrial Chemicals, Ltd. SiO2 / AL2O3 molar ratio = 8000 / 1, average particle size 0.8 μm.

[0079] <Hydrolysis inhibitor> [Hygroscopic alkaline earth metal compounds] Calcium oxide: manufactured by Kojundo Chemical Laboratory Co., Ltd. Average particle size: 5 μm. Magnesium oxide: Starmag PSF-150, manufactured by Konoshima Chemical Co., Ltd., average particle size 0.6 μm. [Hydrophilic Zeolite] Mizuka Sieves 5AP: manufactured by Mizusawa Industrial Chemicals, Ltd. SiO2 / AL2O3 molar ratio = 2 / 1, average particle size 5 μm.

[0080] [others] Aluminum vapor deposition film 1: Aluminum vapor deposition PET film, IB-PET-PIR, manufactured by Dai Nippon Printing Co., Ltd., 12 μm thick. PET film 1: Espet T4012 manufactured by Toray Film Processing Co., Ltd., film thickness 12 μm. Aluminum foil 1: 7 μm thick DL Adhesive 1: Dry laminating adhesive, RU004 / H-1, manufactured by Rock Paint Co., Ltd. ·LDPE1: Novatec LC600A manufactured by Japan Polyethylene Co., Ltd. LLDPE1: Evolue SP2020 manufactured by Prime Polymer Co., Ltd. MFR: 2.3 g / 10 min, Density: 0.916 g / cm 3 .

[0081] <Preparation of master batch> The masterbatch was prepared as follows: [Adjustment of Masterbatch 1] LDPE1 and Kesmon NS-241, an inorganic porous material supporting a chemical adsorbent, were melt-blended in the following ratio to obtain Masterbatch 1 (MB1). LDPE1 90 parts by mass Kesmon NS-241 10 parts by mass [Adjustment of Masterbatches 2 to 11] According to the formulations in Tables 1 and 2, melt blending was carried out in the same manner as for Masterbatch 1 to obtain Masterbatches 2 to 11 (MB2 to 11).

[0082] [Table 1]

[0083] [Table 2]

[0084] Example 1 [Production of deodorizing sealant film] The MB1 and LLDPE1 obtained above were dry blended in the following ratio to obtain a mixture for the deodorizing layer. Masterbatch 1 83.3 parts by mass LLDPE1 16.7 parts by mass The mixture obtained above and LLDPE1 for the heat seal layer 1 were laminated by inflation film formation at 160°C to obtain a sealant layer film having the following three-layer structure. Heat seal layer 1 (10 μm) / deodorant layer (30 μm) / heat seal layer 1 (10 μm) Next, the PET film for the base layer 1, the aluminum foil for the gas barrier layer 1, and the obtained film for the sealant layer were dry laminated with the DL adhesive 1 (coating amount of 3.5 g / m for each adhesive layer). 2 , drying temperature 70°C) to obtain a deodorizing sealant film having the following layer structure. PET film 1 (12 μm) / DL adhesive 1 (3.5 g / m 2 ) / Aluminum foil 1 (7 μm) / DL adhesive 1 (3.5 g / m 2 ) / Deodorizing sealant layer [Heat seal layer 1 (10 μm) / Deodorizing layer (30 μm) / Heat seal layer 1 (10 μm)]

[0085] [Preparation of hydrolysis-inhibiting sealant film] The MB9 and LLDPE1 obtained above were dry blended in the following proportions to obtain a mixture for the hydrolysis-inhibiting layer. Masterbatch 9 66.7 parts by mass LLDPE1 33.3 parts by mass The mixture obtained above and LLDPE1 for the heat seal layer 2 were laminated by inflation film formation at 160°C to obtain a sealant layer film having the following three-layer structure. Heat seal layer 2 (15 μm) / hydrolysis suppression layer (30 μm) / heat seal layer 2 (15 μm)

[0086] Next, the PET film 1, the aluminum foil 1, and the obtained film for the sealant layer were mixed with DL adhesive 1 (amount applied per adhesive layer: 3.5 g / m 2 ) and bonded together by dry lamination (drying temperature 70°C) to obtain a hydrolysis-inhibiting sealant film having the following layer configuration. PET film 1 (12 μm) / DL adhesive 1 (3.5 g / m 2 ) / Aluminum foil 1 (7 μm) / DL adhesive 1 (3.5 g / m 2 ) / hydrolysis-inhibiting sealant layer [heat seal layer 2 (15 μm) / hydrolysis-inhibiting layer (30 μm) / heat seal layer 2 (15 μm)]

[0087] [Production of deodorizing packaging bags] The deodorizing sealant film and hydrolysis-inhibiting sealant film prepared above were each cut to a size of 20 x 20 cm, and the deodorizing sealant layer and the hydrolysis-inhibiting sealant layer were overlapped facing each other. The three edges were heat-sealed using a heat seal tester (TP-701-A, manufactured by Tester Sangyo Co., Ltd.) to prepare a deodorizing packaging bag.

[0088] [evaluation] Various evaluations were carried out using the deodorizing sealant film, hydrolysis-inhibiting sealant film, and deodorizing packaging bag obtained above.

[0089] <Examples 2 to 21, Comparative Examples 1 and 2> Masterbatches and intermediate layer materials were selected according to the descriptions in Tables 3 to 7, and deodorizing sealant films, hydrolysis-inhibiting sealant films, and deodorizing packaging bags were produced in the same manner as in Example 1, and evaluated in the same manner.

[0090] <Summary of results> The deodorizing sealant films and hydrolysis-inhibiting sealant films of the examples of the present invention, and the packaging bags made from them, exhibited good film-forming properties, bag-forming properties, heat-sealing properties, deodorizing effects, and relative humidity reducing effects. On the other hand, the comparative films not corresponding to the present invention and the packaging bags made therefrom exhibited insufficient deodorizing effect, relative humidity reducing effect, and insufficient film-forming property and bag-forming property.

[0091] <Evaluation method> [Bag-making properties] ○: The packaging bag was easily produced. ×: Packaging bags could not be easily produced, and many unfused portions and wrinkles were generated.

[0092] [Seal strength] The deodorizing sealant film and the hydrolysis-inhibiting sealant film were each cut into 10 cm x 10 cm pieces, and the sealant layer surfaces of each were overlapped. Using a heat seal tester (TP-701-A manufactured by Tester Sangyo Co., Ltd.), a 1 cm x 10 cm area was heat-sealed, with the ends not heat-sealed or bonded, creating a bifurcated sample. This sample was cut into a 15 mm wide strip, and each bifurcated end was attached to a tensile tester to measure the tensile strength (N / 15 mm) and judge whether it passed or failed. (Heat sealing conditions) Temperature: 160℃ Pressure: 1kgf / cm 2 Time: 1 second (Tensile strength test conditions) Test speed: 300 mm / min Load range: 50N (Pass / Fail criteria) ○: 30N / 15mm or more, passed. ×: Less than 30N / 15mm, failed.

[0093] [Deodorizing performance, relative humidity] The deodorizing sealant film and hydrolysis-inhibiting sealant film were each cut into 20 x 20 cm pieces, and 1000 ml of each was placed in a gas sampling bag (IB-PET-PIR 12 μm / adhesive layer / ONy 15 μm / adhesive layer / LLDPE film 60 μm) along with odor components adjusted to a relative humidity of 80% or higher and a temperature and humidity data logger (T&D Corporation, TR-72wf). After leaving the bag for two days, the odor change was measured by sensory evaluation, and the relative humidity was measured using the temperature and humidity data logger. The odor components were adjusted to 200 ppm acetaldehyde and 30 ppm acetic acid. The evaluation criteria are as follows: 1 = No change from the beginning, smell 2 = The odor has been slightly reduced since the beginning. 3 = The odor has been significantly reduced compared to the initial condition. 4 = No smell at all

[0094] [Table 3]

[0095] [Table 4]

[0096] [Table 5]

[0097] [Table 6]

[0098] [Table 7] [Explanation of symbols]

[0099] 1 Deodorizing packaging 2 Seal part L section line 11 Deodorizing sealant film 12 Base material layer 1 13 Gas barrier layer 1 14 Deodorizing sealant layer 14a Deodorizing layer 14b Heat seal layer 1 16 Hydrolysis-inhibiting sealant film 17 Base material layer 2 18 Gas barrier layer 2 19 Hydrolysis-inhibiting sealant layer 19a Hydrolysis inhibition layer 19b Heat seal layer 2 20 Chemical odor adsorbent-supported inorganic porous material

Claims

1. A deodorizing package having a configuration in which a deodorizing sealant film having a base layer 1 and a deodorizing sealant layer and a hydrolysis-inhibiting sealant film having a base layer 2 and a hydrolysis-inhibiting sealant layer are stacked together so that the deodorizing sealant layer and the hydrolysis-inhibiting sealant layer face each other, and the edges are sealed, the deodorizing sealant layer contains a deodorizer and a deodorizer-dispersed resin, The deodorant is a hydrophobic zeolite having a SiO 2 / Al 2 O 3 molar ratio of 30 / 1 to 10,000 / 1. and a chemical odor absorbent and / or an odor-decomposing metal compound, The chemical odor adsorbent is a compound having a reactive functional group that chemically reacts with and bonds to the contents themselves and odorous substances produced by hydrolysis of the contents, and is selected from amino group-containing compounds, carboxyl group-containing compounds, hydroxyl group-containing compounds, carbonates, and bicarbonates; The odor-decomposing metal compound is an oxide and / or salt of one or more elements selected from the group consisting of Cu, Zn, Ag, Pt, Au, Fe, and alkali metals, the hydrolysis-inhibiting sealant layer contains a hydrolysis inhibitor and a hydrolysis inhibitor-dispersed resin, the hydrolysis inhibitor contains one or more compounds selected from the group consisting of hygroscopic alkali metal compounds and hygroscopic alkaline earth metal compounds; The hygroscopic alkali metal compound or hygroscopic alkaline earth metal compound is Li 2 O, Na 2 O.K. 2 selected from O, MgO, BaO, LiCl, and LiOH; the content of the deodorizing agent in the deodorizing sealant layer is 0.5% by mass or more and 15% by mass or less, The deodorizing package is characterized in that the content of the hydrolysis inhibitor in the hydrolysis inhibiting sealant layer is 1% by mass or more and 50% by mass or less.

2. The deodorizing sealant film further includes a gas barrier layer 1 between the substrate layer 1 and the deodorizing sealant layer, The hydrolysis-inhibiting sealant film further includes a gas barrier layer 2 between the substrate layer 2 and the hydrolysis-inhibiting sealant layer, the gas barrier layer 1 and / or the gas barrier layer 2 is one or more selected from the group consisting of a gas barrier resin coating film, a metal foil, a resin film with a metal vapor deposition layer, and a resin film with a metal oxide vapor deposition layer; The deodorizing package according to claim 1.

3. The deodorant dispersion resin and / or the hydrolysis inhibitor dispersion resin are polyolefin resins. The deodorizing package according to claim 1 or 2.

4. the deodorizing sealant layer comprises a deodorizing layer and a heat seal layer 1; the deodorizing layer is a layer containing the deodorizer and the deodorizer-dispersed resin, The heat seal layer 1 does not contain the deodorizing agent but contains a polyolefin resin, has heat sealability, and is the layer farthest from the base material layer 1 and / or the layer closest to the base material layer 1 in the deodorizing sealant layer. The deodorizing package according to any one of claims 1 to 3.

5. the hydrolysis-inhibiting sealant layer comprises a hydrolysis-inhibiting layer and a heat-sealing layer 2; the hydrolysis-inhibiting layer contains the hydrolysis inhibitor and the hydrolysis-inhibiting agent-dispersed resin, the heat seal layer 2 does not contain the hydrolysis inhibitor but contains a polyolefin resin, has heat sealability, and is the layer farthest from the base layer 2 and / or the layer closest to the base layer 2 in the hydrolysis inhibiting sealant layer; The deodorizing package according to any one of claims 1 to 4.

6. The polyolefin resin has a density of 0.90 g / cm 3 Above, 0.94g / cm 3 characterized in that it is LDPE and / or LLDPE, The deodorizing package according to any one of claims 3 to 5.

7. A deodorizing packaging bag, characterized in that it is made using the deodorizing packaging material according to any one of claims 1 to 6.

8. A deodorizing pouch bag, characterized in that it is produced using the deodorizing packaging material according to any one of claims 1 to 6.

9. A deodorizing sealant film, which is used to prepare the deodorizing packaging material according to any one of claims 1 to 6.

10. A hydrolysis-inhibiting sealant film, which is used to prepare the deodorizing packaging material according to any one of claims 1 to 6.

Images