Film, multilayer film, packaging bag, and package

Abstract

To provide a film which can suppress deterioration caused by light of a sterilization agent or a bactericidal agent.SOLUTION: A film, which is a packaging material for forming a packaging bag for storing an article containing a sterilization agent or a bactericidal agent, or a light-shielding material for light-shielding an article containing a sterilization agent or a bactericidal agent, has transmittance to light at a wavelength of 200 to 700 nm of 2% or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to films, multilayer films, packaging pouches, and packages. [Background technology]

[0002] Packaging bags are used to contain a variety of products, including food, medical supplies, drugs, etc. The properties of the products contained are diverse, including solids, liquids, and semi-solids, and the properties of the products are also diverse (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-117233 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, products containing a germicide or disinfectant are distributed in a state of being contained in a packaging bag. However, it has been found that the germicide or disinfectant in the package is easily deteriorated by light.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a film or multilayer film that can suppress deterioration of a germicide or disinfectant due to light. The present disclosure also aims to provide a packaging bag formed from such a film or multilayer film, and a package including the packaging bag. [Means for solving the problem]

[0006] [1] A film which is a packaging material for forming a packaging bag for containing an article containing a bactericide or disinfectant, or a light-shielding material for shading an article containing a bactericide or disinfectant, A film having a transmittance of 2% or less for light with wavelengths of 200 to 700 nm. [2] [1] A film having a gas barrier layer. [3] A film of [1] or [2], comprising a sealant layer. [4] The film according to any one of [1] to [3], which has a light-shielding layer having thermal adhesion. [5] The film according to [4], wherein the light-shielding layer contains an inorganic pigment. [6] A multilayer film that is a light-shielding material or a packaging material, A substrate film and a sealant layer are provided in this order, the sealant layer is an outermost layer and contains an inorganic pigment; A multilayer film with a transmittance of 2% or less for light with wavelengths of 200 to 700 nm. [7] A multilayer film that is a light-shielding material or a packaging material, a multilayer film in which a base film as an outermost layer, a layer containing an inorganic pigment, and a sealant layer are laminated in this order in direct contact with each other; A multilayer film with a transmittance of 2% or less for light with wavelengths of 200 to 700 nm. [8] A multilayer film that is a light-shielding material or a packaging material, The film has, in this order, a substrate film as an outermost layer, an adhesive layer, a layer containing an inorganic pigment, and a sealant layer, The substrate film may have an inorganic oxide layer deposited on the adhesive side, There is no light-transmitting base film between the base film and the sealant layer, A multilayer film with a transmittance of 2% or less for light with wavelengths of 200 to 700 nm. [9] The multilayer film according to any one of [6] to [8], wherein the inorganic pigment is at least one of a black pigment and a white pigment.

[10] The multilayer film according to any one of [6] to [9], wherein the inorganic pigment is at least one of silica, titanium oxide, alumina, carbon black, and layered minerals.

[11] A multilayer film according to any one of [6] to

[10] for forming a packaging bag for containing an article containing a germicide or disinfectant.

[12] A packaging bag formed from any one of the films [1] to [5] or any one of the multilayer films [6] to

[11] .

[13] A package in which an article containing a bactericide or disinfectant is contained in a packaging bag described in

[12] .

[14] The film according to [5], wherein the inorganic pigment is at least one of a black pigment and a white pigment.

[15] The film according to [5], wherein the inorganic pigment is at least one of silica, titanium oxide, alumina, carbon black, and layered minerals. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a film or multilayer film capable of suppressing deterioration of a germicide or disinfectant due to light. The present disclosure also provides a packaging bag formed from such a film or multilayer film, and a package including the packaging bag. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view of a light-blocking material according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a cross-sectional view of a packaging material according to an embodiment of the present disclosure. [Diagram 3] FIG. 2 is a cross-sectional view of a packaging material according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is a cross-sectional view of a packaging material according to an embodiment of the present disclosure. [Diagram 5] 1 is a schematic diagram showing a packaging bag according to an embodiment of the present disclosure. [Figure 6]FIG. 1 is a graph showing the results of measuring the total light transmittance of titanium oxide-containing LLDPE layers 1 to 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The film of the present embodiment has a transmittance of 2% or less for light having a wavelength of 200 to 700 nm. Such a film can be used as a packaging material for forming a packaging bag for storing an article containing a bactericide or disinfectant, or as a light-shielding material for shading an article containing a bactericide or disinfectant. The film may be a single-layer film or a multi-layer film. The multilayer film of the present embodiment may satisfy at least one of the following conditions (A) to (C). Condition (A): A base film and a sealant layer are provided in this order, the sealant layer being the outermost layer and containing an inorganic pigment. Condition (B): A multilayer film is provided in which a base film as the outermost layer, a layer containing an inorganic pigment, and a sealant layer are laminated in this order in direct contact with each other. Condition (C): The film has a base film as an outermost layer, an adhesive layer, a layer containing an inorganic pigment, and a sealant layer in this order, and the base film may have a layer on which an inorganic oxide layer is vapor-deposited on the adhesive side, A multilayer film having no light-transmitting base film between the base film and the sealant layer. When the multilayer film includes a sealant layer containing an inorganic pigment, the sealant layer may have a transmittance of 2% or less for light with a wavelength of 200 to 700 nm.

[0010] The light-shielding material of the present embodiment is a film-like light-shielding material for shading an article containing a germicide or disinfectant, and has a transmittance of 1% or less for light with a wavelength of 200 to 700 nm. Such a light-shielding material can suppress deterioration of the germicide or disinfectant due to light.

[0011] It is known that many germicides or disinfectants are decomposed by ultraviolet irradiation. However, according to the inventor's intensive research, it has been found that the deterioration of the germicide or disinfectant cannot be sufficiently suppressed by simply blocking the ultraviolet light irradiated to the article containing the germicide or disinfectant. In other words, the germicide or disinfectant is decomposed not only by ultraviolet light but also by visible light, so that it is necessary to block visible light in order to store the article containing the germicide or disinfectant for a long period of time.

[0012] 1 shows a cross-sectional view of a light-shielding material 100 according to this embodiment. The light-shielding material 100 has a film (light-shielding layer) that is light-shielding to visible light. The light-shielding material 100 may be composed of only the light-shielding film (light-shielding layer) 101, or may further include other layers.

[0013] The light-shielding layer may be a layer containing an inorganic pigment. The inorganic pigment is not particularly limited, but is preferably at least one of a black pigment and a white pigment. Examples of the white pigment include silica, titanium oxide, alumina, etc. Examples of the black pigment include carbon black, etc. Other examples of the inorganic pigment include layered minerals such as mica.

[0014] The light-shielding layer may be, for example, a layer having an inorganic pigment and a thermoplastic resin. Such a layer may also function as a heat-fusible layer (sealant layer). The layer having an inorganic pigment and a thermoplastic resin is a layer containing the inorganic pigment within the sealant layer. When the sealant layer contains an inorganic pigment, the content of the inorganic pigment may be 5% by mass or more, and may be 6 to 10% by mass or more, based on the total amount of the sealant layer.

[0015] Specific examples of thermoplastic resins include ethylene-based resins such as low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, and ethylene-(meth)acrylic acid copolymer, as well as polyolefin-based resins such as blended resins of polyethylene and polybutene, and polypropylene-based resins such as propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer. The LLDPE may be produced using a metallocene catalyst.

[0016] The layer containing an inorganic pigment and a thermoplastic resin may be a film obtained by forming a material in which an inorganic pigment is kneaded into a thermoplastic resin, or a coating film obtained by applying and drying an inorganic ink containing an inorganic pigment, a thermoplastic resin, and a solvent, or the like.

[0017] The light-shielding material may have a plurality of light-shielding layers. For example, the light-shielding material may have a multi-layer structure in which two or more light-shielding layers are laminated. An example of a laminate of two or more layers containing an inorganic pigment and a thermoplastic resin is a laminate of an LLDPE layer (white layer) kneaded with a white pigment and an LLDPE layer (black layer) kneaded with a black pigment, laminated in this order of white-black-white.

[0018] The thickness of the light-shielding layer may be 5 to 150 μm, 15 to 90 μm, or 20 to 80 μm.

[0019] The light-shielding material may have a sealant layer in addition to the light-shielding layer. When the light-shielding material has a sealant layer, the light-shielding material can also be used as a packaging material. The thickness of the sealant layer may be 5 to 150 μm, 15 to 90 μm, or 20 to 80 μm. Examples of materials for the sealant layer include the above-mentioned thermoplastic resins.

[0020] The light-shielding material may have a gas barrier layer. The gas barrier layer is not particularly limited, and may be a layer (vapor deposition layer) on which a metal or an inorganic compound is vapor-deposited. The vapor-deposited layer may be obtained by vapor-depositing aluminum, and aluminum oxide (AlO x ), silicon oxide (SiO x ) (x is, for example, 1.0 to 2.0), and from the viewpoint of resistance to chlorous acid or a salt thereof, the vapor deposition layer may be a layer containing an oxide. When the light-shielding material has a gas barrier layer, it is possible to suppress a decrease in concentration due to the dissipation of chlorous acid.

[0021] The thickness of the vapor-deposited layer may be appropriately set depending on the intended use, but is preferably 30 nm or more, 50 nm or more, and 100 nm or less, 80 nm or less. By setting the thickness of the vapor-deposited layer to 30 nm or more, the continuity of the vapor-deposited layer is easily ensured, and by setting the thickness to 100 nm or less, the occurrence of curling or cracking can be sufficiently suppressed, and sufficient gas barrier performance and flexibility can be easily achieved.

[0022] The light-shielding material may have a base film. The base film may be a flexible film. The base film may include, for example, a film-like thermoplastic polymer. Examples of the flexible film include films of biaxially oriented polypropylene (BOPP), polyethylene terephthalate (PET), oriented polyamide (OPA), non-oriented polypropylene (CPP), linear low-density polyethylene (LLDPE), and low-density polyethylene (LDPE). The light-shielding material may be a deposition film (transparent deposition film) having a layer (a layer containing an inorganic oxide) in which an inorganic oxide such as silica is deposited on a PET film. The thickness of the base film may be 5 to 150 μm, 15 to 90 μm, or 20 to 80 μm. When the base film has a deposition layer, the deposition layer may be in contact with an adhesive layer.

[0023] The transmittance of the light shading material for light with a wavelength of 200 to 700 nm may be 1.5% or less, 1% or less, 0.9% or less, 0.8% or less, 0.7% or less, or 0.6% or less. Also, the transmittance of the light shading layer in the light shading material for light with a wavelength of 200 to 700 nm may be 1% or less, 0.9% or less, 0.8% or less, 0.7% or less, or 0.6% or less.

[0024] The light-shielding material may be light-shielding against ultraviolet rays. The transmittance of the light-shielding material for wavelengths of 200 nm or more and less than 400 nm may be 0.5% or less, 0.3% or less, 0.2% or less, 0.1% or less, or substantially 0%. The transmittance of the light-shielding layer in the light-shielding material for light with wavelengths of 200 nm or more and less than 400 nm may be 0.5% or less, 0.3% or less, 0.2% or less, 0.1% or less, or substantially 0%.

[0025] The light-shielding material of this embodiment can be used to store an article containing a germicide or disinfectant in a container, and then wrap the container around the container to shield the article containing the germicide or disinfectant from light. After wrapping the light-shielding material around the container, the wrapped state may be fixed with an adhesive, adhesive tape, or the like. The container is not particularly limited as long as it can store an article containing a germicide or disinfectant, and may be made of any material, such as glass, resin, or metal such as stainless steel. The container may be sealed with a lid such as a screw cap, or the opening may be sealed by welding or the like after the article containing the germicide or disinfectant is placed in the container.

[0026] The light-shielding material of the present embodiment may be included in the packaging material. That is, the packaging material may be formed from the light-shielding material, and may additionally have other layers. In the case of the packaging material, it may be made into a packaging bag by bagging.

[0027] The packaging material according to the present embodiment is a packaging material for forming a packaging bag for containing an article containing a bactericide or disinfectant, and may include the above-mentioned light-shielding layer. The packaging material may have a sealant layer and a base film in addition to the light-shielding layer, and the sealant layer may be the outermost layer of the packaging material so as to constitute the innermost layer when the packaging bag is made. The outermost layer on the opposite side to the sealant layer may be a base film. The packaging material may further have a gas barrier layer.

[0028] Fig. 2 shows a cross-sectional view of a packaging material (which may be a light-shielding material) 10 according to this embodiment. In Fig. 2, the packaging material 10 includes a base film 1, an adhesive layer 2, and a sealant layer 3, in this order. In the packaging material of Fig. 2, the sealant layer 3 contains an inorganic pigment together with the thermoplastic resin. In other words, the sealant layer also functions as a light-shielding layer. Such a packaging material 10 can be obtained by forming a layer of an adhesive composition (adhesive layer 2) on the base film 1 by a dry lamination method or the like, and laminating the sealant layer 3 on the adhesive layer.

[0029] 3 shows a cross-sectional view of another example of the packaging material (which may be a light-shielding material) of this embodiment. The packaging material 20 includes, in this order, a base film 1, an adhesive layer 2, a light-shielding layer 5, and a sealant layer 4. Such a packaging material 20 can be obtained by forming a layer of an adhesive composition (adhesive layer 2) on the base film 1 by a dry lamination method or the like, and laminating the sealant layer 4 having the light-shielding layer 5 formed on the surface thereof on the adhesive layer 2.

[0030] A cross-sectional view of a packaging material (which may be a light-shielding material) according to this embodiment is shown in Fig. 4. In Fig. 4, a packaging material 30 includes a base film 1, a gas barrier layer 7, an adhesive layer 2, a light-shielding layer 6, and a sealant layer 4, in this order.

[0031] The packaging bag of this embodiment can be formed by placing the sealant layers of the packaging material face to face and heat sealing them. Fig. 5 shows an example of the packaging bag of this embodiment. The packaging bag 110 of Fig. 5 is formed by placing two packaging materials 60 and 62 face to face and heat sealing the three pieces. The packaging bag 110 has a storage section 102 surrounded by the heat-sealed parts of the three pieces. An article containing a disinfectant or sanitizer can be stored in the storage section. After storing an article containing a disinfectant or sanitizer in the storage section, the opening of the packaging bag can be sealed by heat sealing or the like to produce a package that stores an article containing a disinfectant or sanitizer in the packaging bag.

[0032] The bactericide or disinfectant is not particularly limited as long as it can reduce the population of at least one type of microorganism such as bacteria, fungi, and viruses.Specific examples of the bactericide or disinfectant include cationic bactericides, iodine bactericides, phenolic bactericides, biguanide bactericides, terpenoid bactericides, chlorine bactericides, amphoteric surfactant bactericides, aldehyde compounds, and alcohol compounds.Only one or more of these can be used.The bactericide or disinfectant may be in the form of a solution, particularly in the form of an aqueous solution.

[0033] Examples of chlorine-based disinfectants include hypochlorous acid, chlorous acid, and salts thereof. The chlorine-based disinfectant is not particularly limited as long as it is a disinfectant containing chlorine, and the salt may be, for example, a metal salt, or an alkali metal salt such as a sodium salt. The chlorine-based disinfectant may be in the form of a hypochlorous acid aqueous solution, a hypochlorous acid aqueous solution, or the like, or may be in the form of chlorous acid water described below. Examples of alcohol compounds include ethanol.

[0034] In this specification, chlorous acid water is an aqueous solution produced by the following reaction. First, an aqueous solution in which chloric acid or a chlorate is dissolved is prepared. The aqueous solution is obtained by adding hydrochloric acid to an aqueous solution in which sodium chloride is dissolved, and electrolysis is performed in a membrane-free electrolytic cell under acidic conditions (see formula A below), or by adding sulfuric acid to an aqueous solution of a chlorate to make it strongly acidic, thereby generating chloric acid (see formula B below). Next, hydrogen peroxide is added to cause a reduction reaction to generate chlorous acid (HClO2) in the aqueous solution (see formulas C and D below), thereby obtaining chlorous acid water. The chlorate may be sodium chlorate. When carrying out the reaction of formula B, sulfuric acid may be added so that the pH of the aqueous solution of chloric acid is maintained within the range of 2.3 to 3.4. Formula A: NaCl + 3H2O + 6e - →NaClO3+3H2↑ B formula: 2NaClO3+H2SO4→2HClO3+Na2SO4↓ C formula: 2HClO3+H2O2→2ClO2+2H2O+O2↑ D formula: 2ClO2+H2O2→2HClO2+O2↑

[0035] In order to stably maintain chlorous acid (HClO2) for a long period of time, the chlorous acid water may contain at least one compound selected from the group consisting of inorganic acids, inorganic acid salts, organic acids, and organic acid salts. Examples of inorganic acids include carbonic acid, phosphoric acid, boric acid, and sulfuric acid. Examples of inorganic acid salts include carbonates (including hydrogen carbonates), hydroxides, phosphates, and borates. Specifically, examples of carbonates include sodium carbonate, potassium carbonate, sodium hydrogen carbonate, and potassium hydrogen carbonate. Examples of hydroxides include sodium hydroxide and potassium hydroxide. Examples of phosphates include disodium hydrogen phosphate, sodium dihydrogen phosphate, trisodium phosphate, tripotassium phosphate, dipotassium hydrogen phosphate, and potassium dihydrogen phosphate. Examples of borates include sodium borate and potassium borate. Examples of organic acids include succinic acid, citric acid, malic acid, acetic acid, and lactic acid. Examples of organic acid salts include sodium succinate, potassium succinate, sodium citrate, potassium citrate, sodium malate, potassium malate, sodium acetate, potassium acetate, sodium lactate, potassium lactate, and calcium lactate.

[0036] The pH of the chlorous acid water may be 3.2 to 7.0.

[0037] The article containing a bactericide or disinfectant may be a solution (aqueous solution) of the bactericide or disinfectant, but may be, for example, a porous substrate, a fiber substrate, or other substrate impregnated with a bactericide or disinfectant in the form of a solution. Examples of the substrate material include sheets, films, patches, brushes, nonwoven fabrics, papers, cloth, absorbent cotton, sponges, etc. The substrate may contain a plurality of these materials.

[0038] Bactericides or disinfectants are sometimes sold as highly concentrated solutions (aqueous solutions). When using, an appropriate amount is taken out from a container containing hypochlorous acid water, and the concentration is adjusted as desired, making the operation complicated. Therefore, a bactericide or disinfectant solution (aqueous solution) of a concentration suitable for use may be divided into portions suitable for one use and stored in a packaging bag.

[0039] In the packaging bag according to one embodiment of the present disclosure, when chlorous acid water having a free chlorine concentration of 200 mg / L or more is sealed in the packaging body and stored at 40° C. for three weeks, the free chlorine concentration of the chlorous acid water in the packaging body may be 100 mg / L or more. Such a packaging bag may be the packaging bag according to the first and second embodiments described above. The free chlorine concentration in the chlorous acid water is measured before sealing, and the chlorous acid water is promptly sealed in the packaging body after the measurement. The free chlorine concentration can be measured by JIS K 0102 33.4 (diethyl-p-phenylenediammonium (DPD) spectrophotometry) or a method conforming thereto. The free chlorine concentration after three weeks of storage (free chlorine concentration after storage) is measured by removing the chlorous acid water from the packaging bag. The packaging bag may be, for example, a three-sided bag of 10 cm×10 cm, and may be heat-sealed on all four sides when sealed.

[0040] Specific examples of the light-shielding material or packaging material include the following. The adhesive sheet has a base film, an adhesive layer, and a sealant layer in this order, and satisfies at least one of the following (1) and (2). (1) The sealant layer contains an inorganic pigment. (2) A layer containing an inorganic pigment is provided between the sealant layer and the adhesive layer. (3) A layer containing an inorganic oxide is provided at least either between the substrate film and the adhesive layer or between the sealant layer and the adhesive layer. In the case of (3), a light-shielding layer may further be provided. EXAMPLES

[0041] (Examples 1 to 3) An adhesive composition was prepared by blending an aliphatic polyester polyol (manufactured by Mitsui Chemicals, Inc., product name: Takelac A626) as a base material, a polyisocyanate (manufactured by Mitsui Chemicals, Inc., product name: Takenate A50) as a curing agent, and ethyl acetate as a solvent. The adhesive composition was applied to a substrate film GL-ARH (manufactured by Toppan Printing Co., Ltd., thickness: 12 μm, a film having an alumina deposition layer on a PET substrate) using a dry lamination device to form an adhesive layer. Next, an LLDPE film containing titanium oxide was laminated as a sealant layer. The laminate (packaging material) was obtained by curing at 40° C. for 3 days. The manufacturing method of the LLDPE used in the sealant layer and the content of titanium oxide in each example are shown in Table 1.

[0042] Example 4 The layers were laminated so as to have the following layer structure to obtain a laminate (packaging material).

[0043] Comparative Example 1 A transparent laminate (packaging material) of Comparative Example 1 was obtained in the same manner as in Example 1, except that the sealant layer used was LLDPE that did not contain titanium oxide.

[0044] The layer structures of the packaging materials of Examples 1 to 4 and the Comparative Example are as follows. Example 1: GL-ARH / adhesive layer / LLDPE layer containing titanium oxide 1 Example 2: GL-ARH / adhesive layer / LLDPE layer 2 with titanium oxide Example 3: GL-ARH / adhesive layer / LLDPE layer containing titanium oxide 3 Example 4: Base film (PET) / light-shielding print (white chalk light-shielding sepia) / adhesive layer / GL-RD / adhesive layer / LLDPE layer containing titanium oxide 4 Comparative example 1: GL-ARH / adhesive layer / LLDPE layer GL-RD (a film having a silica vapor deposition layer on a PET substrate) is a barrier film manufactured by Toppan Printing Co., Ltd., and was laminated so that the vapor deposition layer faced the adhesive layer. In addition, the white-chalky light-blocking sepia light-blocking printing in Example 4 indicates that the white ink was applied twice, the black ink was applied once, and the light-blocking sepia was applied once, in that order, on the base film (PET). The same applies to Examples 1 to 3. The inks used in the light-blocking printing are as follows: White ink: Sakata Inx Corporation, "Bellcolor 120R White" Black ink: "Riogran Black" manufactured by Toyo Ink Co., Ltd. Shading sepia: "Fine Star Shading Sepia" manufactured by Toyo Ink Co., Ltd.

[0045] Two of the resulting packaging materials were stacked so that the sealant layers faced each other, and three pieces were heat sealed to create a 10 cm x 10 cm three-sided bag. 20 ml of chlorous acid water (free chlorine concentration 8000 ppm) was sealed in the three-sided bag to create a package containing chlorous acid water.

[0046] (Measurement of free chlorine concentration) The chlorous acid water just before sealing in the three-sided bag and the package were stored at 40°C, and the free chlorine concentration of the chlorous acid water taken out of the package every month was measured using the method of JIS K 0102 33.4. The free chlorine concentration of the chlorous acid water just before sealing in the three-sided bag was 223 mg / L. The measurement was performed on two samples each, and the average value was calculated. The results are shown in Table 1.

[0047] (Measurement of transmittance in the ultraviolet-visible region) The transmittance was measured using a spectrophotometer U-3010 manufactured by Hitachi Ltd., in accordance with the test method for total light transmittance of plastics - transparent materials specified in JIS K 7361-1. The measurement results of the total light transmittance for the titanium oxide-containing LLDPE layers 1 to 4 are shown in Figure 6. The titanium oxide-containing LLDPE layers used in Examples 1 to 4 are referred to as LLDPE layers 1 to 4, respectively.

[0048] [Table 1] [Explanation of symbols]

[0049] Reference Signs List 1...base film, 2...adhesive layer, 3, 4...sealant layer, 5...light-shielding layer, 6...light-shielding layer, 7...gas barrier layer, 10, 20, 30, 60, 62...packaging material (laminate), 100...light-shielding material, 101...light-shielding layer, 110...packaging bag, 102...container section.

Claims

1. A film which is a packaging material for forming a packaging bag for containing an article containing a bactericide or disinfectant, or a light-shielding material for shading an article containing a bactericide or disinfectant, A film having a transmittance of 2% or less for light having a wavelength of 200 to 700 nm.

2. The film of claim 1 having a gas barrier layer.

3. The film of claim 1 or 2, comprising a sealant layer.

4. The film according to claim 1 or 2, comprising a heat-sealable light-shielding layer.

5. The film of claim 4 , wherein the light-blocking layer comprises an inorganic pigment.

6. A multilayer film that is a light-shielding material or a packaging material, A substrate film and a sealant layer are provided in this order, the sealant layer is an outermost layer and contains an inorganic pigment; A multilayer film having a transmittance of 2% or less for light having a wavelength of 200 to 700 nm.

7. A multilayer film that is a light-shielding material or a packaging material, a multilayer film in which a base film as an outermost layer, a layer containing an inorganic pigment, and a sealant layer are laminated in this order in direct contact with each other; A multilayer film having a transmittance of 2% or less for light having a wavelength of 200 to 700 nm.

8. A multilayer film that is a light-shielding material or a packaging material, The film has, in this order, a substrate film as an outermost layer, an adhesive layer, a layer containing an inorganic pigment, and a sealant layer, The substrate film may have an inorganic oxide layer deposited on the adhesive side, There is no light-transmitting base film between the base film and the sealant layer, A multilayer film having a transmittance of 2% or less for light having a wavelength of 200 to 700 nm.

9. The multilayer film according to any one of claims 6 to 8, wherein the inorganic pigment is at least one of a black pigment and a white pigment.

10. The multilayer film according to any one of claims 6 to 8, wherein the inorganic pigment is at least one of silica, titanium oxide, alumina, carbon black, and layered minerals.

11. The multilayer film according to any one of claims 6 to 8, for forming a packaging bag for containing an article containing a germicide or disinfectant.

12. A packaging bag formed from the film according to claim 1 or 2, or the multilayer film according to any one of claims 6 to 8.

13. A package comprising an article containing a germicide or disinfectant contained in the packaging bag according to claim 12.

14. The film according to claim 5 , wherein the inorganic pigment is at least one of a black pigment and a white pigment.

15. 6. The film of claim 5, wherein the inorganic pigment is at least one of silica, titanium oxide, alumina, carbon black, and layered minerals.

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