JP2019182536A - Package and packaging product - Google Patents

Abstract

To provide a package and a packaging product that can have high deodorization effect on a denaturation odor from contents.SOLUTION: A packaging bag consists of laminate films 1a-1c each including a base material layer 11, a printing layer 12, and a sealant layer 15, and the printing layer 12 includes deodorization layers L3, L4 containing a deodorant. The deodorization layers L3, L4 contain, as the deodorant, at least one of hydrophobic zeolite of 30/1 to 8,000/1 in SiO/AlOmol ratio, a chemical adsorbent carrying inorganic porous body, and an inorganic odor decomposer.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a package and a packaged food, for example, a package for heat sterilization treatment composed of a heat-sealed laminated film, and a packaged food obtained by sealing and packaging a food in the package.

  In packaged foods such as retort foods and chilled foods, the contents may deteriorate or denature due to heat sterilization during manufacture (for example, retort heating or boil heating) or long-term storage, and a denatured odor may be generated. The sources of denatured odor are carbohydrates, fats and oils, proteins and the like, and among them, the denatured odor (especially sulfur odor) of proteins contained in meat, fish, soybean, egg and the like often becomes a problem. Such a modified odor is a cause of impairing the flavor of the contents, and may also occur during cooking such as range heating and hot water bathing.

  In order to remove odor components such as modified odors, packaging materials containing odor adsorbents such as zeolite and activated carbon have been proposed. For example, Patent Document 1 proposes a packaging material that reduces harmful substances that migrate from a container to contents and substances that cause undesirable flavor with hydrophobic zeolite. In Patent Document 2, an odor adsorbent in which a chemical adsorbent is supported on an inorganic porous body is adsorbed to a resin composition in order to adsorb an odor component generated by decomposition of a constituent resin of a package by radiation sterilization treatment. Packaging materials have been proposed.

Japanese Patent Laid-Open No. 5-230794 JP 2014-233408 A

  The packaging material described in Patent Document 1 has a problem that it adsorbs not only odor components but also moisture in the atmosphere and desorbs the odor components once adsorbed. For this reason, it is difficult to obtain a sufficient deodorizing effect against the modified odor generated from the contents of the package. Moreover, in order to remove the modified odor from the contents with the hydrophobic zeolite added to the paperboard or the like constituting the packaging material, a large amount of hydrophobic zeolite is required, resulting in an increase in cost.

  The packaging material described in Patent Document 2 cannot cope with the heat sterilization treatment. This is because the chemical adsorbent used is weak at high temperatures, so that the adsorption capacity is impaired when heat sterilization is performed. Therefore, it is difficult to obtain a sufficient deodorizing effect against the modified odor generated by heating the contents of the package. In addition, a large amount of the odor adsorbent is required to form the odor adsorbing layer of the laminate with the resin composition containing the odor adsorbent, resulting in an increase in cost.

  This invention is made | formed in view of such a condition, The objective is to provide the low cost package and packaged food which can obtain the high deodorizing effect with respect to the modified | denatured odor from the contents. is there.

  In order to achieve the above object, the packaging body of the first invention is a packaging body comprising a laminated film including at least a base material layer, a printing layer, and a sealant layer, and the printing layer contains a deodorizing body. A deodorizing layer is included.

In the first invention, the deodorizing layer contains a hydrophobic zeolite having a SiO ₂ / Al ₂ O ₃ molar ratio of 30/1 to 8000/1 as the deodorizing body. It is characterized by doing.

  The package of the third invention is characterized in that, in the first or second invention, the deodorizing layer contains a chemical adsorbent-supporting inorganic porous material as the deodorant.

  The package of the fourth invention is characterized in that, in any one of the first to third inventions, the deodorizing layer contains an inorganic odor decomposing agent as the deodorant.

  The package of the fifth invention is the above-mentioned third invention, wherein the chemically adsorbent-supporting inorganic porous material is one or more selected from the group consisting of copper, zinc, silver, platinum, iron, and cobalt. It is characterized by containing these metals.

  The packaging body of the sixth invention is the above-mentioned fourth invention, wherein the inorganic odor decomposing agent comprises one or more metals selected from the group consisting of copper, zinc, silver, platinum, iron and cobalt. It is characterized by containing.

  The packaging body according to a seventh aspect of the present invention is the packaging body according to any one of the first to sixth aspects, wherein the deodorizing layer is formed by a gravure printing method or a flexographic printing method using an ink containing the deodorizing body. It is characterized by being.

  The package of the eighth invention is characterized in that, in any one of the first to seventh inventions, the sealant layer is made of a polyethylene film or a polypropylene film.

  The packaging body of a ninth invention is characterized in that, in any one of the first to eighth inventions, the content of the deodorizing body in the deodorizing layer is 0.5 to 15% by weight. .

  The package of the tenth invention is a food package capable of containing food in the first to ninth inventions, and corresponds to heat sterilization treatment. Features.

  The packaged food of the eleventh invention is characterized in that the packaged food is hermetically packaged in a state where the food is contained in the package according to any one of the first to tenth inventions.

  According to the present invention, since the printing layer is configured to include a deodorant layer containing a deodorant, compared with the case where the substrate layer or the sealant layer contains the deodorant, A deodorant can be made to act efficiently with respect to an odor component, suppressing content. And since it is not necessary to use a special adsorption film etc., the deodorizing effect can be acquired at low cost and compactly. Therefore, it is possible to realize a low-cost and compact package and packaged food that can obtain a high deodorizing effect on the modified odor from the contents. For example, even if the protein contained in the contents is denatured by heat sterilization or long-term storage during the manufacture of packaged foods and a sulfur odor is generated, the sulfur odor component (sulfur compounds such as dimethyl trisulfide) The efficient deodorizing action of the deodorant can prevent the flavor of the contents from being impaired.

The external view which shows schematic structure of the packaging bag and packaged food which concern on 1st Embodiment. The external view which shows schematic structure of the packaging bag and packaged food which concern on 2nd Embodiment. Sectional drawing which shows the specific example of the laminated | multilayer film which comprises the packaging bag which concerns on 1st, 2nd embodiment.

  Hereinafter, packages, packaged foods, and the like according to embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the mutually same part of each embodiment, a specific example, etc., and the overlapping description is abbreviate | omitted suitably.

  FIG. 1 schematically shows an appearance of a packaged food 201A configured with the packaging bag 101A according to the first embodiment, and FIG. 2 illustrates a package configured with the packaging bag 101B according to the second embodiment. The external appearance of the foodstuff 201B is shown typically. The packaged foods 201A and 201B are sealed and packaged with the food F (for example, meat, ham, sausage, salad chicken, kamaboko, fish, soybeans, boiled eggs, etc.) contained in the packaging bags 101A and 101B. It is.

  The packaging bags 101A and 101B are composed of two sheets, a front sheet 1A and a back sheet 1B. Each of the sheets 1A and 1B is made of a laminated film, and is formed by heat sealing (thermal bonding) so that an accommodation space 2 for accommodating the food F as contents is formed inside the packaging bag. This heat sealing is performed under a sealing temperature condition in a range that does not impair the properties and functions of the product at the time of bag making with a continuous bag making machine for producing an actual product. In addition, the specific structure (FIG. 3) of a laminated film is demonstrated later.

  Here, a flat pouch type is assumed as the packaging bags 101A and 101B. After the food F is put into the storage space 2 of the packaging bags 101A and 101B, when the processing such as deaeration, heat sealing, and heat sterilization (for example, retort heat sterilization or boil heat sterilization) is performed, the food F is stored in the storage space 2 The packaged foods 201A and 201B that are hermetically packaged in the state of being accommodated therein are obtained. The packaging bags 101A and 101B are compatible with both post-packaging heating and pre-packaging heating, but the uses of the packaging bags 101A and 101B are set according to specific sterilization treatment, distribution mode, and the like. For example, not only for retort heat sterilization and low temperature (100 ° C. or lower) boil heat sterilization, but also for hot packs that sterilize the inner surface of the package simply by raising the contents, freezing distributed without heat treatment Uses are included in the use.

  A packaged food similar to the above can also be configured by using other types of packages. For example, the front sheet 1A and the back sheet 1B are formed with a recess serving as the accommodation space 2 in one of the sheets, the food F is put into the recess and deaerated, and then covered with the other sheet and heat sealed. The packaged foods 201A and 201B may be configured by performing processing such as heat sterilization (drawing packaging). Moreover, the packaged foods 201A and 201B are prepared by using a lid made of a laminated film and a molded container (for example, a tray, a blister pack, etc.), sealing the molded container containing the food F with a lid, and performing a process such as heat sterilization. May be configured.

  In FIG. 3, as a specific example of the two sheets 1A and 1B constituting the packaging bags 101A and 101B, laminated films 1a, 1b and 1c are shown in a laminated section. The laminated film 1a shown in FIG. 3 (A), the laminated film 1b shown in FIG. 3 (B), and the laminated film 1c shown in FIG. 3 (C) are all intermediate between the substrate layer 11, the printed layer 12, the adhesive layer 13, and the like. It is composed of a layer 14 and a sealant layer (thermal adhesive resin layer) 15. In the laminated films 1a, 1b, and 1c, the film layer has three layers of the base material layer 11, the intermediate layer 14, and the sealant layer 15. In the laminated films 1a and 1b, the printed layer 12 is formed on the base material layer 11. In the laminated film 1c, the printed layer 12 is formed separately on the base material layer 11 and the intermediate layer 14. Note that the printing layer 12 of one of the front sheet 1A and the back sheet 1B may be omitted, and the intermediate layer 14 may be omitted in the laminated films 1a and 1b.

  The laminated film 1a (FIG. 3A) is composed of a base layer 11, a printed layer 12 composed of a pattern layer L1, a white ink layer L2, and a deodorizing layer L3 in order from the outer side of the package to the inner side of the package, and an adhesive layer. 13, an intermediate layer 14, an adhesive layer 13, and a sealant layer 15. The laminated film 1b (FIG. 3B) is composed of a base layer 11, a printed layer 12 composed of a pattern layer L1 and a deodorizing layer L4, an adhesive layer 13, and an intermediate layer in order from the outer side of the package to the inner side of the package. 14, an adhesive layer 13, and a sealant layer 15. The laminated film 1c (FIG. 3C) includes a base layer 11, a printed layer 12 composed of a picture layer L1 and a white ink layer L2, an adhesive layer 13, and an intermediate layer in order from the outer side of the package to the inner side of the package. 14, a printing layer 12 made of the deodorizing layer L 3, an adhesive layer 13, and a sealant layer 15.

  Specific examples of the base material layer 11 include polyester films such as polyethylene terephthalate (PET) films and polybutylene terephthalate (PBT) films, and polyamide films such as nylon. 5-30 micrometers is preferable and, as for the thickness of the base material layer 11, 10-30 micrometers is still more preferable. If the thickness of the base material layer 11 is 5 μm or more, more excellent dimensional stability, heat resistance and the like can be obtained, and if it is 30 μm or less, more excellent bending resistance can be obtained.

  If the base material layer 11 has a single-layer structure composed only of a polyester film, the cost can be reduced even if the base material layer 11 is not composed of a special film (coextruded film or the like). In addition, if the vapor-deposited silica layer is a biaxially stretched transparent vapor-deposited polyethylene terephthalate (transparent VMPET) film that functions as a barrier layer for preventing permeation of water vapor, oxygen, etc., for example, a base layer 11 having a thickness of about 12 μm is formed ( Transparent VMPET (coat) / printing / DL / ONY / DL / CPP), food F can be preserved while suppressing alteration due to oxidation of food F, etc. (expiration date extension effect, etc.).

  Specific examples of the intermediate layer 14 include a polyamide film such as a biaxially stretched nylon (ONY) film, a transparent vapor-deposited polyethylene terephthalate (transparent VMPET) film, and a metal foil (such as an aluminum foil). For example, by including a polyamide-based film in the intermediate layer 14 of the laminated films 1a, 1b, 1c, it can be pierced from the corners of other packages during transportation, etc., and can be transmitted to the package and bend due to the impact. Excellent resistance can be obtained. Further, for example, silica or the like may be vapor-deposited on a biaxially stretched nylon film having a thickness of about 15 μm to form the intermediate layer 14 to prevent permeation of water vapor, oxygen and the like.

  As a method for depositing an inorganic substance (metal, metal oxide) on the base material layer 11 or the intermediate layer 14, a vacuum deposition method (PVD method) for depositing an inorganic substance evaporated under reduced pressure, or for vapor deposition including an inorganic substance under reduced pressure A plasma chemical vapor deposition method (CVD method) in which a gas is irradiated with plasma to deposit the inorganic substance on the base material layer 11 or the like can be given. As the inorganic material to be deposited, for example, metal oxides such as silicon oxide (silica), aluminum oxide (alumina), and magnesium oxide can be used. For example, silica (chemical vapor deposition: CVD), alumina (physical vapor deposition: PVD), etc. can be used as the transparent vapor deposition material of the transparent VMPET film, and a PVA (polyvinyl alcohol) -based barrier resin coating agent can be used instead of the transparent vapor deposition material. The same function can be obtained even if is used. The film thickness of silica or alumina is preferably 5 to 50 nm, and more preferably 10 to 30 nm.

  Specific examples of the sealant layer (thermoadhesive resin layer) 15 include polyethylene films such as linear low density polyethylene (LLDPE) films and polypropylene films such as unstretched polypropylene (CPP) films. Since the CPP film is excellent in heat resistance, it can cope with the case where the food F that becomes high temperature by heating in the microwave oven is stored in the packaging bags 101A and 101B. A polyethylene film is preferable in that it has a property of being resistant to sterilization and sterilization treatment by ultraviolet ray (UV) irradiation and the like and hardly decomposed.

  The thickness of the sealant layer 15 is preferably 40 to 200 μm, and more preferably 50 to 80 μm. The sealant layer 15 having a thickness set in these ranges is excellent in impact resistance against dropping that may occur in the distribution process of the packaged foods 201A and 201B, and is easy to fill the contents and take out the contents. Excellent handleability. In addition, the sealant layer 15 is provided in order to bond and seal two laminated films by overlapping each other and heat-sealing the opposite peripheral edges. Therefore, when the bag is made, it is positioned most inside the packaging bag.

  The adhesive layer 13 is formed of, for example, a dry laminating adhesive (DL) generally used in a dry laminating method. Specific examples of the adhesive 13 include a polyvinyl acetate adhesive, a polyacrylate ester adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a polyester adhesive, and a polyamide adhesive. Agents, amino resin adhesives, epoxy adhesives, polyurethane adhesives, and the like. The thickness of the adhesive layer 13 is preferably 0.5 to 5 μm, and more preferably 0.5 to 2.5 μm. If the thickness of the adhesive layer is 0.5 μm or more, it is easy to control the film thickness, and if it is 5 μm or less, it is easy to suppress production costs while providing sufficient adhesive strength.

  In the laminated films 1a, 1b, and 1c, the pattern layer L1 included in the printed layer 12 is an ink layer that displays information on the contents (food F) and the like. For example, the back surface or intermediate layer of the base material layer 11 The desired thickness (for example, 1 to 5 μm) is formed by printing a desired pattern (characters, figures, symbols, patterns, etc.) on one side of 14. Further, in the laminated films 1a and 1c, the white ink layer L2 included in the printing layer 12 is an ink layer provided for design, light shielding, and the like, for example, a sheet with respect to the back surface of the pattern layer L1. It is formed to have a desired thickness (for example, 1 to 5 μm) so as to cover the entire surface.

  For the formation of the pattern layer L1, for example, a urethane-based ink containing four component color pigments of cyan (cyan) C, magenta (red purple) M, yellow (yellow) Y, and black (black) K is used. For example, urethane-based ink containing white (white) W white ink (white pigment: titanium oxide) is used to form the white ink layer L2. The white ink layer L2 may be omitted as appropriate, and a white W white pigment may be used as one of the color pigments in the picture layer L1.

In the laminated films 1a, 1b, and 1c, the deodorant layers L3 and L4 included in the printing layer 12 are deodorizers having a SiO ₂ / Al ₂ O ₃ molar ratio of 30/1 to 8000/1. It is an ink layer containing at least one of zeolite, a chemical adsorbent-supporting inorganic porous material, and an inorganic odor decomposing agent. In order to efficiently obtain the deodorizing effect by the deodorizing body, the deodorizing layer L3 or the deodorizing layer L4 is disposed most inside the packaging bag in the printing layer 12. Moreover, the deodorizing layer L4 contained in the printing layer 12 in the laminated film 1b serves as the white ink layer L2 by including the deodorizing body in the ink as a white inorganic pigment.

  In the laminated films 1a and 1b, the intermediate layer 14 is assumed to be a material through which an odor component is easily transmitted, such as a polyamide film. That is, the laminated films 1a and 1b have a laminated structure of a base material layer 11 (for example, PET) / printing layer 12 (picture / deodorant) / DL / intermediate layer 14 (for example, ONY) / DL / sealant layer 15 (for example, CPP). have. For this reason, the odor component generated in the food F passes through the sealant layer 15, the intermediate layer 14, and the adhesive layer 13, and is deodorized by the deodorizing layers L3 and L4. On the other hand, in the laminated film 1c, the intermediate layer 14 is assumed to be a material that does not easily transmit odor components such as an aluminum foil. That is, the laminated film 1c has a laminated structure as a base material layer 11 (for example, PET) / printed layer 12 (picture) / DL / intermediate layer 14 (for example, aluminum foil) / printed layer 12 (deodorant) / DL / sealant layer 15. (For example, CPP). For this reason, the odor component generated in the food F passes through the sealant layer 15 and the adhesive layer 13 and is deodorized by the deodorizing layer L3 located inside the packaging bag with respect to the intermediate layer 14.

  The front sheet 1A and the back sheet 1B of the packaging bags 101A and 101B include a pattern printing part P1 composed of a pattern layer L1, a white printing part P2 composed of a white ink layer L2, and a deodorizing layer L3 or a deodorizing layer L4. The deodorant printing part P3 is printed. The pattern printing portion P1 is provided on a part of the packaging bags 101A and 101B, and the white printing portion P2 is provided on the entire surface of the packaging bags 101A and 101B in a solid coating shape. The deodorizing printing part P3 is provided in a solid or mesh pattern on the entire surface of the packaging bag 101A (FIG. 1), and is solid only in the area covering the accommodation space 2 in the packaging bag 101B (FIG. 2). It is provided in a paint or mesh shape. Since the deodorizing layer L4 is also used as the white ink layer L2, the deodorizing layer L4 is provided in a solid or mesh shape on the entire surface of the sheet like the packaging bag 101A.

  Since the food (contents) F is stored in the storage space 2, the portions where the sheets 1 </ b> A and 1 </ b> B can easily come into contact with the food F are portions that cover the storage space 2. Therefore, if the deodorizing printing part P3 is provided only for the range covering the accommodation space 2 as in the packaging bag 101B (FIG. 2), the deodorizing body used for the deodorizing layer L3 can be reduced. A high deodorizing effect can be obtained at low cost. Note that the printing parts P1 to P3 may be provided on only one of the two sheets 1A and 1B or may be provided on both, depending on the required deodorizing ability or the like.

  When preparing the ink to be used for the printing layer 12, one or more additives (plasticizer, stabilizer, antioxidant, light stabilizer, ultraviolet absorber, curing agent, cross-linking agent, if necessary) , Lubricants, antistatic agents, fillers, etc.) are optionally added, and additional colorants (dyes, pigments, etc.) are added as appropriate, followed by thorough kneading using a solvent, diluent, and the like. Specific examples of the printing method employed include gravure printing, flexographic printing, offset printing, letterpress printing, screen printing, transfer printing, and the like.

Deodorant layer L3, L4, as described above, a hydrophobic zeolite of SiO ₂ / Al ₂ O ₃ molar ratio of 30 / 1-8000 / 1, and the chemical adsorbent supported inorganic porous material, and inorganic odor decomposing agent , At least one of them is contained as a deodorant. The deodorizing layers L3 and L4 are one of the ink layers constituting the printing layer 12, and in the deodorizing layers L3 and L4, the content (solid content) of the deodorant is 0.5 to 15 weight. % Is preferred. If it is 0.5% by weight or more, it is possible to exert a good odor adsorption effect, and if it is 15% by weight or less, it is possible to obtain good film forming properties. Therefore, when the deodorizing layers L3 and L4 contain 0.5 to 15% by weight of the deodorizing body, the deodorizing performance and the printing performance can be well balanced.

As a specific example of a commercially available product of hydrophobic zeolite, Mizusuka Chemicals Co., Ltd. Mizuka Sieves (registered trademark) EX-122 (SiO ₂ / Al ₂ O ₃ molar ratio = 32/1, average particle size = 2.5 to 5.5 μm), Shiruton (registered trademark) MT400 manufactured by Mizusawa Chemical Co., Ltd. MT400 (SiO ₂ / Al ₂ O ₃ molar ratio = 400/1, average particle size = 5 to 7 μm), Shiruton manufactured by Mizusawa Chemical Co., Ltd. (Registered trademark) MT8000 (SiO ₂ / Al ₂ O ₃ molar ratio = 8000/1, average particle diameter = 0.8 μm). Specific examples of commercially available chemical adsorbent-supporting inorganic porous materials include Kesmon (registered trademark) NS-10C and NS-20C manufactured by Toagosei Co., Ltd. Specific examples of commercially available inorganic odor degrading agents include Dashlite (registered trademark) CZU1721 (copper oxide / zinc oxide composite aluminosilicate, average particle size = 3 to 5 μm) manufactured by Sinanen Zeomic Co., Ltd.

Hydrophobic zeolite generally has higher hydrophobicity as the SiO ₂ / Al ₂ O ₃ molar ratio is higher. If the hydrophobicity is high, water molecules with high polarity are difficult to adsorb, and conversely, odor components with low polarity (for example, odorous molecules, hydrophobic gases, lipophilic gases (including solvent-based gases), etc.) have an affinity. It is easy to adsorb because it is high. Furthermore, due to the effects of alkali metals (Na, K, etc.) and alkaline earth metals (Ca, etc.) present on the zeolite surface, the zeolite surface exhibits basicity, so that acidic gas is easily adsorbed by a neutralization reaction. Therefore, adsorption of moisture is suppressed, and odor components with low polarity are easily adsorbed, and efficient deodorization becomes possible. However, if the SiO ₂ / Al ₂ O ₃ molar ratio is too high, the characteristics of the ink used and the film forming properties of the deodorizing layers L3 and L4 tend to be lowered, so that the deodorizing effect becomes difficult to stabilize. Therefore, it is possible to stably obtain a high deodorizing effect by using a hydrophobic zeolite having a SiO ₂ / Al ₂ O ₃ molar ratio of 30/1 to 8000/1. Moreover, even if the packaging bags 101A and 101B are exposed to 230 ° C. or higher, the hydrophobic zeolite does not lose its odor adsorbing ability and can exhibit the effect of adsorbing odor components.

  Since the hydrophobic zeolite is used as an ink pigment of the printing layer 12, a powder form is preferable. That is, the hydrophobic zeolite may have an arbitrary outer shape such as a spherical shape, a rod shape, or an elliptic shape, and may have any shape such as a powder shape, a lump shape, or a granular shape. From the viewpoints of film properties, uniform dispersibility in a synthetic resin binder, kneading characteristics, and the like, a powder form is preferable.

  The average particle size of the hydrophobic zeolite can be appropriately selected according to the use, but is preferably 0.01 to 10 μm. This average particle diameter is a value measured by a dynamic light scattering method. When the average particle size is smaller than 0.01 μm, aggregation of the hydrophobic zeolite is likely to occur, and the dispersibility in the deodorizing layers L3 and L4 tends to be reduced. In other words, the hydrophobic zeolite that is too fine and aggregated settles in the synthetic resin binder, and the deodorizing layers L3 and L4 are constituted by the ink having low dispersibility. Moreover, when an average particle diameter is larger than 10 micrometers, it exists in the tendency for the film forming property of the deodorizing layers L3 and L4 containing a hydrophobic zeolite to be inferior. For example, when the deodorant layers L3 and L4 are formed by gravure printing, the hydrophobic zeolite as a pigment becomes larger than the cell, so that poor transfer is likely to occur. Therefore, the amount of hydrophobic zeolite added tends to be difficult to increase. Furthermore, since the surface area of the hydrophobic zeolite is reduced, there is a possibility that it is difficult to obtain a sufficient deodorizing effect.

  The said chemical adsorbent carrying | support inorganic porous body exhibits a deodorizing effect by having the metal ion (for example, copper ion) which changes an odor component into another component by a chemical reaction in the form of a chemical adsorbent, for example. . Moreover, the said inorganic odor decomposing agent exhibits a deodorizing effect by having the metal oxide (for example, copper oxide) which changes an odor component into another component by chemical reaction, for example. According to the chemical adsorption action of these deodorants, the odor components once adsorbed are not easily desorbed, and the deodorization ability is not reduced by efficient adsorption / decomposition of odor components. It becomes possible to do. In addition, these deodorizers are unlikely to be affected by water vapor or the like that lowers the odor adsorption capacity, unlike physical adsorbents in which the odor component and water vapor are adsorbed at the same adsorption site. It is possible to exert a high deodorizing effect on odors.

  The chemical adsorbent-supporting inorganic porous material is obtained by supporting a chemical adsorbent on an inorganic porous material, and for example, the inorganic porous material is impregnated with a solution containing the chemical adsorbent and dried. A method is mentioned. By using the chemical adsorbent-supporting inorganic porous material, the adsorption capacity per unit mass of the chemical adsorbent can be greatly increased, and the contents of the chemical adsorbent and the deodorant in the package can be reduced. Moreover, the deodorizing effect by the physical adsorption of the odor component with respect to the hole part of an inorganic porous body is also acquired.

  Since the chemical adsorbent-supporting inorganic porous material and the inorganic odor decomposing agent are used as the ink pigment of the printing layer 12, a powder form is preferable. That is, the chemical adsorbent-supporting inorganic porous material and the inorganic odor decomposing agent may have any outer shape such as a spherical shape, a rod shape, an elliptic shape, or any shape such as a powder shape, a lump shape, and a granular shape. From the viewpoints of film forming properties of the deodorizing layers L3 and L4, uniform dispersibility in the synthetic resin binder, kneading characteristics, and the like, a powder form is preferable.

  The average particle size of the chemical adsorbent-supporting inorganic porous material and the inorganic odor decomposing agent can be appropriately selected depending on the application, but is preferably 0.01 to 10 μm, and more preferably 0.1 to 8 μm. Preferably, the thickness is 1 to 7 μm. This average particle diameter is a value measured by a dynamic light scattering method. When the average particle size is smaller than 0.01 μm, the chemical adsorbent-supporting inorganic porous material and the inorganic odor decomposing agent are likely to aggregate, and the dispersibility in the deodorizing layers L3 and L4 tends to be lowered. In other words, the chemically adsorbent-supporting inorganic porous material and the inorganic odor decomposing agent which are too fine and aggregated settle in the synthetic resin binder, and the deodorizing layers L3 and L4 are constituted by ink having low dispersibility.

  When the average particle size is larger than 10 μm, the film forming properties of the deodorant layers L3 and L4 containing the chemical adsorbent-supporting inorganic porous material and the inorganic odor decomposing agent tend to be inferior. For example, when the deodorant layers L3 and L4 are to be formed by gravure printing, the chemical adsorbent-supporting inorganic porous material or inorganic odor decomposing agent as a pigment becomes larger than the cell, and the transfer defect is likely to occur. Therefore, the addition amount of the chemical adsorbent-supporting inorganic porous material or the inorganic odor decomposing agent tends to be difficult to increase. Furthermore, since the surface area of the chemical adsorbent-supporting inorganic porous material or the inorganic odor decomposing agent is reduced, it may be difficult to obtain a sufficient deodorizing effect.

  As the inorganic porous material, any inorganic compound having a large number of pores on its surface can be used. Examples thereof include zeolite, silicon dioxide, silicate, activated carbon, titania, inorganic phosphate (such as calcium phosphate), alumina, aluminum hydroxide, magnesium hydroxide, and mixtures thereof. Aluminum hydroxide, zeolite, and silicate are preferably used from the viewpoint of having a porous state having an effective pore size with respect to the molecular size and cluster size of the substance to be adsorbed and from the viewpoint of safety.

  The inorganic porous material may have any outer shape such as a spherical shape, a rod shape, an elliptical shape, and may have any shape such as a powder shape, a lump shape, and a granular shape. After forming the supported inorganic porous material, a powder form is preferable from the viewpoints of film forming properties of the deodorant layers L3 and L4, uniform dispersibility in the synthetic resin binder, kneading characteristics, and the like. The average particle size of the inorganic porous material can be appropriately selected depending on the application, but is preferably 0.01 to 10 μm in order to achieve the average particle size of the chemical adsorbent-supporting inorganic porous material, More preferably, it is 1-8 micrometers, and it is much more preferable that it is 1-7 micrometers.

  The chemical adsorbent is a compound that has a metal ion that causes a chemical reaction with the odor component from the food F, which is the contents of the packaging bags 101A and 101B, and can be supported on the inorganic porous body. For example, when food F deteriorates or denatures due to heat sterilization or long-term storage of packaged foods 201A and 201B, a protein sulfur odor is generated, which is combined with a sulfur compound such as dimethyl trisulfide, which is the main odor component of the sulfur odor. It is a compound having a metal ion. Examples of the compound having metal ions include compounds containing one or more metals selected from the group consisting of copper, zinc, silver, platinum, iron, and cobalt. The inorganic odor decomposing agent is the same as the chemical adsorbent-supporting inorganic porous material, and the compound having a metal oxide that causes a chemical reaction with the odor component and binds to it is made of copper, zinc, silver, platinum, iron, cobalt. Examples thereof include compounds containing one or more metals selected from the group consisting of:

  As described above, according to the packaging bags 101A and 101B according to the first and second embodiments, the print layer 12 includes the deodorant layers L3 and L4 containing the deodorant body. Compared with the case where the base material layer 11 or the sealant layer 15 contains a deodorant body, the deodorant body can efficiently act on the odor component while suppressing the content of the deodorant body. And since it is not necessary to use a special adsorption film etc., the deodorizing effect can be acquired at low cost and compactly. Therefore, it is possible to realize low-cost and compact packaging bags 101A and 101B and packaged foods 201A and 201B that can obtain a high deodorizing effect against the modified odor from the contents. For example, even if the protein contained in the contents is denatured by heat sterilization during the production of the packaged food 201A, 201B or long-term storage and a sulfur odor is generated, sulfur odor components (sulfur such as dimethyl trisulfide) It is possible to prevent the flavor of the contents from being impaired by the efficient deodorizing action of the deodorizing body on the compound). Moreover, if a deodorizing body is used as a pigment such as white ink, the deodorizing layer L4 can also be used as the white ink layer L2 as in the laminated film 1b, so that further cost reduction and downsizing can be achieved.

  As can be seen from the above description, the following characteristic configurations (# 1) to (# 13) and the like are included in the above-described embodiments and examples described later.

(# 1): A packaging body made of a laminated film including a printing layer,
The printing layer includes a deodorizing layer containing a deodorizing body,
The deodorizing layer is, as the deodorant, a hydrophobic zeolite having a SiO ₂ / Al ₂ O ₃ molar ratio of 30/1 to 8000/1, a chemical adsorbent-supporting inorganic porous material, an inorganic odor decomposing agent, A package comprising at least one of the above.

  (# 2): The chemical adsorbent-supporting inorganic porous material or the inorganic odor decomposing agent contains one or more metals selected from the group consisting of copper, zinc, silver, platinum, iron, and cobalt. The package according to (# 1), which is characterized in that

  (# 3): The package according to (# 1) or (# 2), wherein the deodorizing layer contains 0.5 to 15% by weight of the deodorant.

  (# 4): The printed layer further includes a picture layer for displaying information related to the contents contained in the package, (# 1) to (# 3) Packaging body.

  (# 5): The packaging according to any one of (# 1) to (# 4), wherein the printed layer further includes a white ink layer formed on a side surface of the pattern layer in the package. body.

  (# 6): The package according to (# 5), wherein the white ink layer is also used as the deodorant layer by containing the deodorant as a white pigment.

  (# 7): Any of (# 1) to (# 6), wherein the deodorizing layer is formed by a gravure printing method or a flexographic printing method using an ink containing the deodorizing body. Item 1. The package according to item 1.

  (# 8): The package according to any one of (# 1) to (# 7), wherein the deodorizing layer is provided on the entire surface of the package.

  (# 9): In any one of (# 1) to (# 7), the deodorizing layer is provided only in a range that covers a storage space for storing contents in the package. The package described.

  (# 10): The package according to any one of (# 1) to (# 9), wherein the deodorizing layer is provided in a solid coating shape or a mesh shape.

  (# 11): The package according to any one of (# 1) to (# 10), wherein the laminated film further includes a sealant layer made of a polyethylene film or a polypropylene film.

  (# 12): A food packaging body capable of containing food inside, which corresponds to heat sterilization treatment. (# 1) to (# 11) The package described.

  (# 13): A packaged food, wherein the packaged food is sealed and packaged in a state in which the food is contained inside the package according to any one of (# 1) to (# 12).

  Hereinafter, the packaging body, packaged food, etc. which implemented this invention are further demonstrated concretely, giving an Example and a comparative example. Examples 1 to 5 and Comparative Example 1 are configured by a packaging bag 101A in which a deodorizing printing portion P3 is provided on the entire surface of two sheets 1A and 1B. The schematic laminated structures of the sheets 1A and 1B in Examples 1 to 5 and Comparative Example 1 are the base material layer 11 / printing layer 12 (deodorant layer L3 only) / adhesive layer 13 (from the outer side of the packaging bag to the inner side of the packaging bag). When expressed in the form of (DL) / intermediate layer 14 / adhesive layer 13 (DL) / sealant layer 15, PET / print layer / DL / ONY / DL / CPP.

However, details of each layer in the above schematic laminated structure,
PET: Polyethylene terephthalate (PET) film, thickness 12 μm,
ONY: biaxially stretched nylon film, thickness 15 μm,
CPP: unstretched polypropylene (CPP) film, thickness 70 μm,
DL: Adhesive for dry lamination.

Moreover, the printing layer 12 consists only of the deodorizing layer L3, and the printing ink is obtained by adding 0.5% by weight of the following deodorant to the medium of FINAT (registered trademark) manufactured by DIC Graphics Corporation. Were made Examples 1 to 5 and those not added with deodorant were made Comparative Example 1.
Example 1 Deodorant (hydrophobic zeolite): Mizusuka Chemicals Co., Ltd. Mizuka Sieves (registered trademark) EX-122 (SiO ₂ / Al ₂ O ₃ molar ratio = 32/1, average particle size = 2.5 ~ 5.5 μm),
Example 2 Deodorant (hydrophobic zeolite): Shiruton (registered trademark) MT400 manufactured by Mizusawa Chemical Industry Co., Ltd. MT400 (SiO ₂ / Al ₂ O ₃ molar ratio = 400/1, average particle diameter = 5 to 7 μm),
Example 3 Deodorant (hydrophobic zeolite): Shiruton (registered trademark) MT8000 (SiO ₂ / Al ₂ O ₃ molar ratio = 8000/1, average particle size = 0.8 μm) manufactured by Mizusawa Chemical Co., Ltd.
Example 4 Deodorant body (chemically adsorbent-supporting inorganic porous body): Kesmon (registered trademark) NS-10C manufactured by Toagosei Co., Ltd.
Example 5 Deodorant (inorganic odor decomposing agent): Dashlite (registered trademark) CZU1721 (copper oxide / zinc oxide composite aluminosilicate, average particle size = 3 to 5 μm), manufactured by Sinanen Zeomic Co., Ltd.

  Table 1 shows the test results of Examples 1 to 5 and Comparative Example 1. In the test, after putting three kinds of food F (meat, fish, soybean) in the accommodation space 2 of the three packaging bags 101A, respectively, deaeration, heat sealing, boil heat sterilization treatment (100 ° C., 2 hours) And the presence or absence of sulfur odor after being held at 25 ° C. for 24 hours was evaluated (◯: no sulfur odor, x: sulfur odor present). In Examples 1-5, sulfur odor was not confirmed about any of meat, fish, and soybean, and in Comparative Example 1, sulfur odor was confirmed about all of meat, fish, and soybean.

1a, 1b, 1c Laminated film 1A Front sheet (Laminated film)
1B Back sheet (laminated film)
DESCRIPTION OF SYMBOLS 2 Storage space 11 Base material layer 12 Print layer 13 Adhesive layer 14 Intermediate layer 15 Sealant layer L1 Picture layer L2 White ink layer L3, L4 Deodorant layer P1 Picture print part P2 White print part P3 Deodorant print part 101A, 101B Packaging bag (Packaging body)
201A, 201B Packaged food F Food (contents)

Claims (11)

  A packaging body comprising a laminated film including at least a base material layer, a printing layer, and a sealant layer, wherein the printing layer includes a deodorizing layer containing a deodorizing body. The deodorant layer, the packaging body according to claim 1, wherein SiO ₂ / Al ₂ O ₃ molar ratio is characterized by containing 30 / 1-8000 / 1 of hydrophobic zeolite as the deodorizing member.   The package according to claim 1 or 2, wherein the deodorant layer contains a chemical adsorbent-supporting inorganic porous material as the deodorant.   The package according to any one of claims 1 to 3, wherein the deodorizing layer contains an inorganic odor decomposing agent as the deodorizing body.   4. The packaging according to claim 3, wherein the chemical adsorbent-supporting inorganic porous material contains one or more metals selected from the group consisting of copper, zinc, silver, platinum, iron, and cobalt. body.   The package according to claim 4, wherein the inorganic odor decomposing agent contains one or more metals selected from the group consisting of copper, zinc, silver, platinum, iron, and cobalt.   The package according to any one of claims 1 to 6, wherein the deodorizing layer is formed by a gravure printing method or a flexographic printing method using an ink containing the deodorizing body.   The package according to any one of claims 1 to 7, wherein the sealant layer is made of a polyethylene film or a polypropylene film.   Content of the said deodorizing body in the said deodorizing layer is 0.5 to 15 weight%, The package body of any one of Claims 1-8 characterized by the above-mentioned.   The package according to any one of claims 1 to 9, wherein the package is a food package capable of containing food inside, and corresponds to a heat sterilization treatment.   A packaged food product, wherein the packaged food product is hermetically packaged in a state in which the food product is contained inside the package body according to any one of claims 1 to 10.

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