WO2001036519A1 - Film permeable selectivement au dioxyde de carbone et film d'emballage d'aliments le contenant - Google Patents
Film permeable selectivement au dioxyde de carbone et film d'emballage d'aliments le contenant Download PDFInfo
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- WO2001036519A1 WO2001036519A1 PCT/JP2000/007965 JP0007965W WO0136519A1 WO 2001036519 A1 WO2001036519 A1 WO 2001036519A1 JP 0007965 W JP0007965 W JP 0007965W WO 0136519 A1 WO0136519 A1 WO 0136519A1
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- film
- chitosan
- carbon dioxide
- layer
- packaging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
- C08J2305/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/266—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension of base or substrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31971—Of carbohydrate
Definitions
- the present invention relates to a selectively permeable carbon dioxide film derived from a specific natural material and a food packaging film comprising the film. More particularly, it obtained from chitosan is basic polysaccharide, carbon dioxide gas transmission rate (C_ ⁇ 2 TR) and the ratio of the oxygen gas transmission rate ( ⁇ 2 TR) (C_ ⁇ 2 TR / ⁇ 2 TR) is large,
- the present invention also relates to a selectively permeable film of carbon dioxide gas, which is safe for food hygiene, is insoluble in water, and is suitable for packaging fermented foods, fruits and vegetables, cut flowers, and the like, and a food packaging film comprising the same. Background art
- Japanese Patent Application Laid-Open No. H5-222215 discloses polyvinyl alcohol resin and monomers of alkylene glycol and hydroxy acid. And at least one compound selected from the group of polymers and a compound having a solubility ratio of carbon dioxide gas to oxygen gas of 30 or more. is there. It is described that the film obtained from this molded product generates a large amount of carbon dioxide gas and is suitable for packaging foods that do not like to come into contact with oxygen, such as cheese products and coffee beans.
- Hei 9-316162 discloses that a film obtained by heat-treating a reaction mixture composed of polyacrylic acid and aliphatic diamine has resistance to water, and has a carbon dioxide gas permeability and acidity. It is described that the ratio to the raw gas permeability is 15 or more. Also, Japanese Patent Application Laid-Open No. 11-538 states that a film made of a polymer having a polyamine structure has a large transmittance ratio between carbon dioxide gas and oxygen gas.
- An object of the present invention is to provide a film which is insoluble in water, has high safety in food hygiene, and has gas selective permeability having a large ratio of carbon dioxide permeability to oxygen gas permeability.
- the present inventors have found that a film made of a specific chitosan has a large ratio of carbon dioxide gas permeability to oxygen gas permeability, and can solve such a problem, and have completed the present invention.
- the present invention consists key Bok San de Asechiru degree of 70 mol% or more, carbon dioxide gas transmission rate (C_ ⁇ 2 TR) and the ratio (C0 2 TRZ0 2 TR oxygen gas transmission rate ( ⁇ 2 TR) ) Is 15 or more.
- a laminated film comprising at least three layers of an outer layer, an intermediate layer, and an inner layer, wherein the outer layer and the inner layer are made of a thermoplastic resin, and the intermediate layer includes the film of the invention, and a ratio as a laminated film ( C_ ⁇ 2 TRZ_ ⁇ 2 TR) to provide carbon dioxide selective permeable film is 10 or more.
- the present invention also provides a selectively permeable film of carbon dioxide in the above invention, wherein the thickness of the chitosan film in the intermediate layer is 0.2 to 50 m.
- the food packaging film and the food comprising the selectively permeable carbon dioxide film of the invention may be coffee, cheese, miso, pickles, root vegetables, fungi mushrooms, leaf stem vegetables, fruit vegetables or fresh fruits.
- Chitosan can be obtained by deacetylating chitin, which is widely found in nature as a constituent of shells such as shrimp and crab, in a solid state in concentrated alcohol, and completely deacetylated is a constituent unit.
- the chitosan used in the present invention has a molecular weight of 10,000 to 100,000, more preferably 10,000 to 500,000, a viscosity of l to 20,000 cp (l to 20,000 mp a-s), and further a l to 2000 cp (l to 2,000 mp a-s). Those are preferable in terms of coatability as shown in the examples described later.
- the degree of deacetylation is at least 70 mol%, preferably at least 80 mol%.
- a viscosity of 3 to 2000 (3 to 200 OmPas) is desirable from the viewpoint of solution preparation.
- chitosan having a degree of deacetylation of less than 70 mol% obtained by treating chitin in concentrated alcohol cannot be dissolved in acetic acid and a film cannot be formed.
- chitosan When using chitosan, handle it as the above-mentioned chitosan salt solution from the viewpoint of easy handling. Among these, acetate and lactate are preferred in terms of price and food safety. Diluent of hydrophilic organic solvent such as alcohols such as methanol, ethanol, isopropyl alcohol, and ketones in the solution of chitosanate is used. May be used.
- hydrophilic organic solvent such as alcohols such as methanol, ethanol, isopropyl alcohol, and ketones in the solution of chitosanate is used. May be used.
- the chitosan salt solution is applied to the base material, it is difficult to apply the chitosan salt solution on the surface of the base material, and when the chitosan salt solution is repelled, the above diluent or a small amount of a surfactant is easily applied. Become.
- the above-described chitosan salt solution is applied to a base material such as a film, a sheet or a plate, and dried together with the base film (for example, 30 to 150). (° C, 1 second to 30 hours) to obtain a dry chitosanate skin. That is, a chitosanate solution is cast on a support (substrate) such as a metal plate, a glass plate, and a plastic film and dried to form a film.
- a support substrate
- a high-concentration aqueous solution is cast in a film form from the slit while applying discharge pressure by an extruder, and the water-containing film is dried on a rotating drum or belt. Heat the coated film It is molded by a method of drying underneath. Thus, a dried chitosanate film is obtained.
- the solution casting method (casting method, coating method) is preferably used because a molded film (dry film) having excellent transparency can be easily obtained.
- Chitosanate films are water-soluble.
- the dried film is treated with an alkaline aqueous solution, for example, immersed in an aqueous sodium hydroxide solution (for example, immersed in a 1 N aqueous sodium hydroxide solution for 0.5 seconds to 48 hours), and then washed with water (for example, 1 second to 1 hour of tap water). Time) to obtain a film made of chitosan that is insoluble in water, which can be dried (for example, at 30 to 200 ° C, for 0.5 seconds to 1 hour) to obtain a film.
- an alkaline aqueous solution for example, immersed in an aqueous sodium hydroxide solution (for example, immersed in a 1 N aqueous sodium hydroxide solution for 0.5 seconds to 48 hours), and then washed with water (for example, 1 second to 1 hour of tap water). Time) to obtain a film made of chitosan that is insoluble in water, which can be dried (for example, at 30 to 200 ° C, for 0.5 seconds to 1 hour) to obtain
- a chitosan salt solution 0.1 to 10 parts by mass of an acid, for example, acetic acid, preferably 0.2 to 5 parts by mass and a solvent of 5 to 1000 parts by mass are mixed with 1 part by mass of chitosan. It may be prepared by dissolving.
- water is preferable as the solvent.
- a mixed solution of water and a water-soluble organic solvent eg, 2-propanol and ethanol may be used as a solvent within a range in which chitosan is dissolved.
- the (film) can be peeled off from the substrate and used alone as a chitosan film.
- the carbon dioxide gas permselective film has a ratio of ( ⁇ 2 TR) (C ⁇ 2 TRZ0 2 TR) of 15 or more, preferably 17 or more.
- 23 ° C the oxygen permeability at 80% RH conditions 0. 1 ⁇ 2000 (c mVm 2 ⁇ day ⁇ atm) (0. 987 ⁇ 19. 74 X 10 3 cmVm 2. D ⁇ MP a), further 0.1 to 1000 (cm 3 / m 2 'd ay. Atm) (0.987 to 9.87 X 10 3 cmVm 2 ⁇ d ⁇ MPa) is preferred.
- 2 3 ° C carbon dioxide gas permeability at 80% RH conditions 3 ⁇ 60000 (cmVm 2 - da V ⁇ atm) (29.
- the substrate as a support may be a film made of a thermoplastic resin, a film made of a thermosetting resin, paper, woven fabric, nonwoven fabric, a porous metal material, or the like. At least one material selected from inorganic sintered porous materials can be used.
- the substrate layer can be appropriately selected in consideration of the use and the fact that the gas permeability of the substrate layer does not extremely hinder the selective permeation performance of carbon dioxide gas of the laminated film.
- the raw material of the film made of the thermoplastic resin is not particularly limited, but examples thereof include polyester, polyolefin, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyamide, polyvinylidene fluoride (PVDF), and polytetrafluoroethylene. And the like, preferably polyester, polyvinylidene fluoride, polyolefin, or polyamide.
- Polyesters include polyethylene terephthalate (PET), polyethylene isophthalate, polybutylene terephthalate, poly (1,4-cyclohexylene dimethylene terephthalate), polyethylene 2,6-naphthalene dicarboxylate, etc.
- Polyolefins include homopolymers and copolymers of olefins, copolymers of olefins with other copolymerizable monomers, for example, copolymers with vinyl monomers, and modifications thereof. And the like.
- high-density polyethylene low-density polyethylene (hereinafter abbreviated as “LDPE”)
- LDPE linear low-density polyethylene
- LLCPE linear ultra-low density polyethylene
- VLDPE linear ultra-low density polyethylene
- ethylene- ⁇ -olefin copolymer using single-site catalyst eg, ssc-VLDPE, ssc-LLDPE, etc.
- PMP poly 4-methylpentene-1
- EVA ethylene-vinyl acetate copolymer
- EVA ethylene ⁇ Acrylic acid copolymer
- EMA ethylene ⁇ methacrylic acid copolymer
- EMA ethylene ⁇ methyl acrylate copolymer
- EMA ethylene ⁇ methyl methacrylate copolymer
- modified polyolefin for example, olefins Homopolymers or copolymers of ethylene with unsaturated carboxylic acids such as maleic acid and fum
- the above polyolefins can be used alone or in combination of two or more. These may be stretched or unstretched. Among these, PMP, VLDPE, EVA, EMAA, LL DPE, ethylene-acrylic acid copolymer, and the like are preferable in view of the physical properties of the obtained laminate.
- a laminated film including at least three layers of an outer layer, an intermediate layer, and an inner layer, wherein the outer layer and the inner layer include a thermoplastic resin, and the intermediate layer includes a film including the chitosan.
- the laminated film C_ ⁇ 2 TR / 0 2 TR
- the carbon dioxide gas selective permeable film is 10 or more.
- the above-mentioned base material can be used as it is as the material constituting the outer layer and the inner layer.
- the substrate may be used as a support when chitosan is used alone or together with the substrate as described above, but may be used as an outer layer or an inner layer of the laminate itself.
- the outer layer and the inner layer are preferably made of a thermoplastic resin.
- the PMP film layer becomes the outer layer or the inner layer.
- the PMP layer / chitosan layer Z adhesive layer Z stretching is performed by laminating the adhesive side of the film obtained by applying an adhesive to the surface of a separately prepared stretched polyethylene film and the chitosan side of the previously obtained laminated film.
- a laminated film of a polyethylene layer is obtained. If a particularly strong bond between the PMP layer and the chitosan layer is required, apply an adhesive to the PMP film, apply a chitosanate solution on it, alkali-treat it into chitosan, and then By laminating the adhesive surfaces of the above, a laminated film of the PMP layer, the Z adhesive layer, the Z chitosan layer, the Z adhesive layer and the stretched polyethylene layer can be obtained.
- the intermediate layer is a laminated film including the chitosan film layer, and the thickness of the chitosan layer is preferably from 0.2 to 50 m, more preferably from 0.5 to 20 m.
- at least one layer selected from the group consisting of paper, woven fabric, nonwoven fabric, polyolefin-based nonwoven fabric, porous polyolefin layer, porous polyester layer, and porous polyamide layer in the sense of reinforcement in either the outer layer or the inner layer. Can also be set up.
- a material that can be heat-sealed, high-frequency sealed, or ultrasonically sealed in consideration of the case where the films are bonded together when manufacturing bags from the laminated body It is preferable to use (sealant).
- heat-sealable resins include low-density polyethylene, linear low-density polyethylene, high-density polyethylene, ethylene-vinyl acetate copolymer, ethylene copolymers obtained using a meta-mouth catalyst, Propylene copolymers obtained using a meta-mouth catalyst, unstretched polypropylene, ethylene / acrylic acid copolymers, ethylene / acrylate copolymers, ethylene / ethyl acrylate copolymers, etc.
- Nylon copolymers such as polyolefin, nylon 666 copolymer, nylon 612 copolymer, etc.
- the resin capable of high frequency sealing include polyvinyl chloride, polyvinylidene chloride, nylon 6, nylon 66, and the like.
- the material of the outer layer and the inner layer may be the same or different.
- each layer of the laminated film is not particularly limited, except for the thickness of the chitosan film included in the intermediate layer, but the thickness of the laminated film as a whole is 30 to 500 ⁇ m, and more preferably 50 to 200 xm. preferable.
- the inner layer preferably has a thickness of 10 to 100 m, more preferably 15 to 80 / xm, from the viewpoint of sealing force and gas permeability.
- the laminated film of the present invention 23 ° C, the oxygen permeability at 80% RH conditions 10 ⁇ 5000 (cm 3 / !!! 2 ⁇ day. Atm) (98. 7 ⁇ 49.
- the water vapor permeability under the conditions of 40 ° C. and 90% RH is preferably from 1 to 100 gZm 2 -day, and more preferably from 1 to 30 g / m 2 ⁇ day, from the viewpoint of preventing discoloration and loss of food.
- Laminate film comprising a film made of chitosan film alone and ⁇ Ki Bok Sun present invention as an intermediate layer, since the ratio (C0 2 TRZ_ ⁇ 2 TR) has one 0 or more, tends to generate carbon gas, oxygen gas It is effective when used for packaging of foods that dislike.
- Foods having the above properties, that is, foods that easily generate carbon dioxide gas and dislike oxygen gas are not particularly limited, but include coffee, cheese, miso, pickles, root vegetables, and the like. Fungal mushrooms, leaf stem vegetables, fruit vegetables, fresh fruits and the like can be mentioned.
- Coffee includes beans and crushed before and after roasting.
- the cheeses include natural cheeses such as Emmental, Chieda, Gruyere, and Goda, and processed cheeses containing these.
- the miso include, for example, white miso, red miso, raw miso and the like, particularly miso of products whose fermentation continues.
- the pickles include, for example, ratsuki, soy sauce, umeboshi, salted pickles such as Chinese cabbage, lees pickles such as nara pickles, wasabi pickles, pickled pickles such as bettarazuke, miso pickles such as wild vegetables and radishes, and a thousand pickles.
- Pickled pickles such as vinegar pickles, pickled eggplant pickles, moromi pickles such as kiyuri pickles, and fermented pickles such as kimchi.
- root vegetables include potatoes, jamatoimo, lotus root, potato, ginger, burdock, taro and the like.
- fungi include mushrooms, nameko, enoki mushroom, shimeji mushroom, mushroom, bean sprouts and the like.
- leafy stem vegetables include spinach, asparagus, garlic, cabbage, Chinese cabbage, rice, chive, cauliflower and the like.
- Fruits and vegetables include, for example, green soybeans, green radish and fresh fruits, for example, oranges, apples, grapes, peaches, pears, persimmons, plums, chestnuts, apricots, and the like. Other than these, cut flowers and the like can be mentioned.
- the food packaging film made of the selectively permeable film of carbon dioxide of the present invention can be used as needed for the ripening and preservation of these foods during production or production, preservation in the distribution process of the products, display and the like.
- the desired package can be obtained.
- the test gas used was a standard gas mixture of carbon dioxide and oxygen gas from Tomoe Shokai Co., Ltd. as the mixed gas.
- high purity helium gas from Tomoe Shokai Co., Ltd. was used as the carrier gas.
- the measurement film was conditioned for 2 days or more in an atmosphere of 23 ° (80% RH). Was used.
- GC-390 gas chromatograph manufactured by GL Science Co., Ltd.
- aqueous solution of 1% by mass or 0.5% by mass of acetate was kept at 20 ° C., and the aqueous solution was measured with a B-type viscometer.
- Chitosan was dissolved in 0.5% by mass of an aqueous acetic acid solution so as to be 0.5% by mass to obtain a chitosan monoacetic acid aqueous solution.
- 1 g of this chitosan solution was taken out, and 30 ml of distilled water was added.
- the resulting aqueous solution was titrated with 1-400N polyvinyl potassium sulfate, and the degree of deacetylation was determined using methylene blue as an indicator.
- the water vapor permeability was measured in the state of the laminate. The measurement was performed at 40 ° C. using a water vapor permeability measuring device (Permatran-W 3/31, manufactured by Modern Control Co., Ltd.). In the laminated film, the surface to be a seal layer was set at a relative humidity of 90% RH, and the other surface was set at a relative humidity of 0% RH.
- chitosan “Chitosan 500” (trade name, manufactured by Wako Pure Chemical Industries, Ltd., labeling) Deacetylation degree: 80 to 90 mol% or more, Viscosity: 300 to 700 cP ⁇ 300 to 700 mPa * s ⁇ , a 0.5% by mass chitosan concentration in a 0.5% by mass aqueous acetic acid solution).
- Acetic acid was adjusted to a 1% by mass aqueous solution by adding water.
- 1 part by mass of chitosan 500 was added to 9.9 parts by mass of the 1% by mass aqueous acetic acid solution, and the mixture was stirred and dissolved to obtain a coating liquid.
- this coating solution was cast on a 5 mm-thick acrylic plate, dried at 30 ° C. for 24 hours, and after evaporating water, it was peeled off from the acrylic plate, and a 30 / zm-thick chitosan acetate monolayer was used. A layer of film was obtained. This film was immersed in a 1N aqueous solution of sodium hydroxide at 20 ° C for 120 seconds.
- the immersed film is immersed in tap water at 20 ° C for 30 minutes, placed in a drier, dried at 90 ° C for 20 minutes, and the water is evaporated to obtain a dry film having a thickness of 40 m. Was.
- the thickness of the dried film increased due to shrinkage.
- the obtained film did not show any change in mass after drying even when immersed in warm water at 80 ° C for 60 minutes, and was insoluble in water.
- chitosan F type As chitosan, “Chitosan F type” (trade name, manufactured by Kimitsu Chemical Co., Ltd., degree of deacetylation: 80 to 90 mol%, viscosity: 5 to 20 cP (5 to 20 mPa a s) [0.5] 0.5% by mass chitosan concentration in a mass% aqueous acetic acid solution] was used.
- Acetic acid was adjusted to a 7% by mass aqueous solution by adding water.
- 10 parts by mass of Chitosan F type was added to 90 parts by mass of the 7% by mass acetic acid aqueous solution, and the mixture was stirred and dissolved to obtain a coating liquid.
- the coating solution thickness 23 zm of ⁇ film manufactured by Mitsui Chemicals Co., Ltd., TK TP X
- the coated product was placed in a dryer and dried at 90 ° C for 20 minutes. The water was evaporated, and a 3 xm-thick dry film composed of chitosan acetate was applied to the PMP film substrate. I got something.
- Example 3 The laminate was immersed in the 1N aqueous sodium hydroxide solution used in Example 1 for 2 seconds, then immersed in tap water under the same conditions as in Example 1, and dried to obtain a laminate. (Example 2). After coating in the same manner as in Example 2 to obtain a laminate coated with a dried film, the sheet was immersed in the 1N aqueous sodium hydroxide solution used in Example 1 for 15 seconds, The laminate was immersed in tap water under the same conditions as in Example 1 and dried to obtain a laminate (Example 3).
- Example 4 After applying a coating in the same manner as in Example 2 to obtain a laminate coated with a dried film, immersing in the 1N aqueous sodium hydroxide solution used in Example 1 for 60 seconds, and then performing After being immersed in tap water under the same conditions as in Example 1, it was dried to obtain a laminate (Example 4).
- a fatty acid ester-based surfactant “J002 of RIKEN Vitamin Co., Ltd.” was added to 100 parts by mass of chitosan as a solid content in the chitosan monoacetic acid aqueous solution used in Example 2, 5 parts by mass of a fatty acid ester-based surfactant “J002 of RIKEN Vitamin Co., Ltd.” was added.
- the coating solution was obtained by stirring and dissolving.
- Example 5 This coating solution was applied in the same manner as in Example 2 to obtain a laminate on which a dried film was applied, and then immersed in the 1N aqueous sodium hydroxide solution used in Example 1 for 120 seconds, Next, the laminate was immersed in tap water under the same conditions as in Example 1 and dried to obtain a laminate (Example 5).
- the gas permeability of the laminate thus obtained was measured with a gas at 23 ° C. and 80% RH (relative humidity) (Examples l to 5a). In Example 5, the gas permeability was further measured under the conditions of 23 t :, 60% RH (Example 5b) and 23 ° C, 90% RH (Example 5c).
- the gas permeation direction of the test using the mixed gas of carbon dioxide / oxygen gas in the laminated film was set from the seal layer side.
- the sample was immersed in a 1N aqueous solution of sodium hydroxide for 120 seconds, and the gas permeability of a 23 zm-thick PMP film ( TR TPX, manufactured by Mitsui Chemicals, Inc.) obtained in the same manner as in Example 1 was measured.
- Chitosan “Chitosan 100D (VL) type” (trade name, manufactured by Dainichi Seika Co., Ltd., degree of deacetylation: 100 mol%, viscosity: 4 to 6 cp (mPa ⁇ s) [0.5 mass% acetic acid 0.5% by mass chitosan concentration in aqueous solution]).
- Acetic acid was adjusted to a 7% by mass aqueous solution by adding water.
- 10 parts by mass of chitosan 100D (VL) type was added to 90 parts by mass of the 7% by mass acetic acid aqueous solution, and the mixture was stirred to dissolve to obtain a coating liquid.
- This coating solution is applied to a 23-inch PMP film (Mitsui Chemicals)
- the coating was performed on a TUX-HC made by Hirano Techseed Co., Ltd. using Multico One-Year.
- the comma direct method was used for the coating method.
- the film was continuously placed in a dryer at 80 ° C and the water was evaporated to obtain a laminate in which a 3 xm-thick dry film made of chitosan acetate was applied on each film substrate. .
- the line speed of the equipment was 2 mZ minutes, and the drying time was 60 seconds.
- the thickness of chitosan was 1.5 im
- Example 12 the thickness of chitosan was 10 // m.
- the dried film is immersed in a 1N aqueous solution of sodium hydroxide for 15 seconds, immersed in tap water for 30 minutes, dried at 90 ° C for 20 minutes in a drier, and the water is evaporated.
- a laminate in which a dry film of chitosan was applied on each film substrate was obtained.
- 100 parts by mass of polyester resin TM-590 manufactured by Toyo Morton Co., Ltd.
- 100 parts by mass of CAT-8B polyester resin manufactured by Toyo Morton Co., Ltd.
- ethyl acetate (Wako Pure Chemical Industries, Ltd.) 765 parts by mass were mixed to prepare an adhesive having a concentration of 15% by mass.
- This adhesive is used to form a 30 m thick ethylene-vinyl acetate copolymer film (EVA: SB-5, manufactured by Yumapori Co., Ltd.) and a 20 m thick stretched polyethylene film to form the seal layer of each laminated film. Coating was applied to one side of (Kojin Police Set UM, manufactured by Kojin Co., Ltd.) and a polyethylene film (TUX-HC, manufactured by Toseguchi Co., Ltd.) having a thickness of 30 xm using a Meyer bar. A laminated film having a coating thickness of 2 m was obtained.
- the laminating surface of the chitosan surface of the laminated film coated with chitosan and the adhesive surface of the film coated with the adhesive were dried at 60 ° C using a laminating condition. The same was applied to the above) to obtain a laminated film of the present invention.
- a laminated film was obtained in the same manner as in Examples 6, 7, and 8, except that the thickness of the PMP film was changed to 30 m.
- Example 6 In the same manner as in Example 6, a 30-m-thick ethylene-vinyl acetate copolymer film (EVA) (manufactured by Yumapori Co., Ltd., SB-5) was used. A laminate having a coating thickness of 2 m after coating and drying was obtained. Separately, one side of the PMP film ( TK TPX, manufactured by Mitsui Chemicals, Inc.) with a thickness of 23 m used in Example 6 was bonded to the adhesive surface of the laminate obtained earlier to form a laminated film. I got (Comparative Example 3)
- EVA ethylene-vinyl acetate copolymer film
- a laminated film was obtained in the same manner as in Comparative Example 2, except that the thickness of the PMP film was changed to 30 m.
- Example 14 Using the laminated films obtained in Example 6, Example 13 and Example 14, a packaging test was carried out on a potato.
- the area of the packaging material shall be 480 cm 2 , and the length of 200 mm shall be inside the sealing layer. It was filled into a 12 cm ⁇ 20 cm bag made with a three-side seal with the seal layer inside and vacuum-packaged. This was stored at 20 ° C for 2 weeks, and the appearance of the packaging material, the color of the cut ends of the potatoes and the taste of the raw food were evaluated visually every week.
- a packaging test was carried out for the imo.
- the area of the packaging material was 480 cm 2, and 200 g of Limo was filled in a bag produced in the same manner as in Example 17 and vacuum-packaged. This was stored at 20 ° C for 2 weeks, and the appearance of the packaging material, the color of the cut edge, and the taste of raw food were evaluated every week by visual inspection.
- “good” means that it is closer to the taste immediately after purchase at a supermarket or greengrocer in a sensory test in subsequent evaluations.
- Table 3 shows the results of the packaging tests of Examples 17, 18, and 19 and Comparative Examples 4 and 5.
- a lotus root test was performed.
- the area of the packaging material was 500 cm 2, and 200 g of lotus root was filled into a 12.5 cm ⁇ 20 cm bag made with a three-side seal with the seal layer inside, and vacuum-packed. This was stored at 20 ° C for 2 weeks, and the appearance of the packaging material, the color of the cut surface of the lotus root, and the taste due to raw food were visually evaluated every week.
- a packaging test of Chinese cabbage kimchi (manufactured by Nakagawa Foods Co., Ltd.) was performed using the laminated films of Examples 6, 13 and 14.
- Packaging material area is set to 300 cm 2, charging a 10 CMX 15 cm bags manufactured in three-way seal cabbage 2 00 g of the sealing layer as the inner And packed in vacuum. This was stored at 20 ° C for one week, and the appearance and color of the packaging material were visually evaluated.
- a 0.5 m thick chitosan dry film obtained by the same method as in Example 6 was applied on one side of a 23 m thick PMP film (manufactured by Mitsui Chemicals, Inc., TPX).
- a laminate was obtained. Further, the laminate was applied to the chitosan surface of the laminate with a Mayer bar so that the thickness of the adhesive used in Example 6 was 2 m, to obtain a laminate.
- the PE non-woven fabric surface of the PE non-woven fabric (AO gZm 2 ) / EVA (20 xm) laminated film (made by Idemitsu Petrochemical Co., Ltd.) is bonded to the chitosan surface coated with adhesive.
- a laminated film was obtained.
- the C0 2 TR of this laminated film was 20000 cmVm 2 .day.atm, ⁇ was 10, and the water vapor permeability was 20 g 2 ⁇ day.
- Example 26 Using this film, a packaging test of Chinese cabbage kimchi was performed under the same conditions as in Example 23, using a 10 cm ⁇ 15 cm bag made with a three-side seal with the sealing layer (EVA) inside (Example 26). ).
- Example 27 A packaging test of Chinese cabbage kimchi was performed under the conditions (Example 27). These were stored at 20 ° C for one week, and the appearance and color of the packaging material were visually evaluated.
- a bag of 10 cm ⁇ 15 cm was formed with a three-side seal with the PE layer on the inside.
- a packaging test of Chinese cabbage kimchi was performed under the same conditions as described above. This was stored at 20 ° C for one week, and the appearance and color of the packaging material were visually evaluated.
- Table 5 shows the results of the packaging tests of Examples 23 to 27 and Comparative Example 8.
- PE non-woven fabric * 6 The thickness was expressed in (g / m z ).
- a 20 m thick oriented polypropylene (PP) film (Toray Co., Ltd. 2535) is coated with an anchor agent (Takelac E—550 Takenate D—140 N mixture) at 1 / xm with a Mayer bar.
- an anchor agent Takelac E—550 Takenate D—140 N mixture
- Example 6 on one side of (TUX-TCS, manufactured by Toseguchi Co., Ltd.) Coating the same adhesive surface as the adhesive of chitosan ⁇ _PP laminated film adhesive t key Bok Sun obtain a PE film formed by coating is applied with a thickness of 2 is applied The adhesive side of the PE film was bonded to obtain a laminated film.
- the C_ ⁇ 2 TR of the laminated full Irumu is 5 0 0 0 cmVm 2 ⁇ day ⁇ atm
- ⁇ 2 TR is 2 5 0 cmVm 2 ⁇ day ⁇ atm
- ⁇ 2 0, the water vapor permeability of 5 g / m 2 ' It was day.
- a bag similar to that of Example 28 was produced with the PE layer inside. Using this bag, the same natural shredded cheese as in Example 28 was subjected to gas replacement packaging, and a packaging test was performed.
- a bag of 20 cm ⁇ 20 cm was made by sealing on three sides, and a packaging test of natural shredded cheese was performed.
- the area of the packaging material was set to 800 cm 2, and 500 g of shredded cheese was packaged by gas replacement in the same manner as in Example 28, and a storage test was performed.
- Table 6 shows the results of the packaging tests of Examples 28 to 30 and Comparative Examples 9 and 10.
- A is an anchor (Example 31)
- a packaging test of raw miso was performed using the laminated film obtained in Example 11.
- a commercially available additive-free raw miso Karl Fischer Co., Ltd.
- PAN polyacrylonitrile
- a deoxidizing agent Mitsubishi Gas Chemical Co., Ltd .; Ageless
- a packaging test was performed using the laminated film used in Example 11 as a lid material.
- the size of the lid material was 11 cm x 11 cm, and it was adhered to the upper edge of the container with an adhesive "Naltiban, Araldide".
- the storage condition was 3 months in an atmosphere of 25 ° C and 65% RH, and the appearance and color were visually evaluated.
- Example 7 A packaging test of raw miso was performed in the same manner as in Example 31 except that a laminated film of a 15 m thick Ny film and a 60 m thick PE film was used as the lid material. Table 7 shows the results of the packaging test of Example 31 and Comparative Example 11. Table 7
- Example 11 A three-sided seal was made from the laminated film obtained in 1 with the EVA layer serving as a seal layer inside, a bag of 20 cm ⁇ 30 cm was prepared, and garlic was peeled and filled at 15 ° C. Stored for a week (Example 32).
- the packing material area was 1200 m 2
- the garlic filling amount was 1 kg
- no swelling of the preserved package and discoloration of the garlic for 2 weeks were observed.
- Example 33 using a 10 cm ⁇ 15 cm bag made from the laminated film obtained in Example 11 with the EVA layer serving as the sealing layer facing inside, sealed at 3 ° C at 5 ° C (Example 33) and green soybeans (Example 34) were vacuum-packaged using 10 cm ⁇ 15 cm bags and stored for one week.
- the packaging material area was 300 cm 2 and the filling amount was 150 g. After storage for one week, no swelling of the package and no discoloration of the contents were observed.
- a selectively permeable film of carbon dioxide from a specific chitosan which has high safety in food hygiene, is insoluble in water, and has a high ratio of carbon dioxide permeability to oxygen gas permeability.
- a laminated fill in which the chitosan layer is sandwiched with another base film is suitable for packaging and storing foods that dislike oxygen during storage and generate a large amount of carbon dioxide, such as potatoes and lotus root. Can be seen from the examples.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020027005196A KR20020060208A (ko) | 1999-11-12 | 2000-11-10 | 탄산가스 선택 투과성 필름 및 그것을 포함하는 식품포장용 필름 |
US10/111,374 US6746762B1 (en) | 1999-11-12 | 2000-11-10 | Film selectively permeable to carbon dioxide gas and food packaging film comprising the same |
EP00974936A EP1245617A4 (en) | 1999-11-12 | 2000-11-10 | FILM SELECTIVE TO CARBON DIOXIDE TRANSPARENT AND FOOD PACKAGING CONTAINING THEM |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/323293 | 1999-11-12 | ||
JP32329399 | 1999-11-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001036519A1 true WO2001036519A1 (fr) | 2001-05-25 |
Family
ID=18153178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/007965 WO2001036519A1 (fr) | 1999-11-12 | 2000-11-10 | Film permeable selectivement au dioxyde de carbone et film d'emballage d'aliments le contenant |
Country Status (5)
Country | Link |
---|---|
US (1) | US6746762B1 (ja) |
EP (1) | EP1245617A4 (ja) |
KR (1) | KR20020060208A (ja) |
CN (1) | CN1390242A (ja) |
WO (1) | WO2001036519A1 (ja) |
Cited By (3)
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WO2004016686A1 (ja) * | 2002-07-22 | 2004-02-26 | Kureha Chemical Industry Company, Limited | アミノ基含有多糖類を含有する組成物及びそれからなる炭酸ガス選択透過性を有するフィルム |
JP2004131622A (ja) * | 2002-10-11 | 2004-04-30 | Dainichiseika Color & Chem Mfg Co Ltd | キトサン水溶液、その製造方法および物品の被覆方法 |
JP2006509848A (ja) * | 2002-11-12 | 2006-03-23 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 水分および気体浸透性、非多孔性イオノマーフィルム |
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US20040050581A1 (en) * | 2002-09-18 | 2004-03-18 | Hager Thomas P. | Low cost, high performance flexible reinforcement for communications cable |
US7180000B2 (en) * | 2002-09-18 | 2007-02-20 | Neptco Jv Llc | Low cost, high performance, flexible, water-swellable reinforcement for communications cable |
US20040050579A1 (en) * | 2002-09-18 | 2004-03-18 | Hager Thomas P. | Low cost, high performance flexible reinforcement for communications cable |
US20060019002A1 (en) * | 2004-07-26 | 2006-01-26 | Harvest Food Co., Ltd. | Method for processing, storing and transporting garlic |
SE0401959D0 (sv) * | 2004-07-30 | 2004-07-30 | Amcor Flexibles Europe As | Permeable packing material |
GB0425288D0 (en) * | 2004-11-16 | 2004-12-15 | Vito | Packaging materials |
BRPI0619671A2 (pt) * | 2005-11-07 | 2011-10-11 | Du Pont | processos de fabricação de laminado seletivamente permeável |
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US7935647B2 (en) * | 2006-12-15 | 2011-05-03 | E. I. Du Pont De Nemours And Company | Laminates of acid polysaccharide films |
WO2009003675A1 (en) * | 2007-07-02 | 2009-01-08 | Dsm Ip Assets B.V. | Container for respiring produce |
US9566768B2 (en) * | 2007-12-17 | 2017-02-14 | Kureha Corporation | Thermally shrinkable laminate film for deep drawing, packaged article, and method for packaging of cheese |
US9120295B2 (en) * | 2008-06-09 | 2015-09-01 | E I Du Pont De Nemours And Company | Chitosan films treated with organic polyhydroxyalkyl compounds and laminates made therefrom |
US7526917B1 (en) | 2008-08-11 | 2009-05-05 | Hoffman John C | Gas diffusion vacuum device |
CN101704955B (zh) * | 2009-07-16 | 2011-11-30 | 大连海事大学 | 一种在水下超疏油的表面制备方法 |
US20110159156A1 (en) * | 2009-12-29 | 2011-06-30 | The Garlic Co. | Packaged fresh diced garlic and process for making same |
JP2014527005A (ja) * | 2011-09-05 | 2014-10-09 | ディーエスエム アイピー アセッツ ビー.ブイ. | 食品または農産物の貯蔵寿命を増大させるための方法 |
WO2018132690A1 (en) | 2017-01-13 | 2018-07-19 | Cryovac, Inc. | Packaging system for ready-to-cook fermented batter |
US20210229410A1 (en) * | 2018-06-12 | 2021-07-29 | Toyobo Co., Ltd. | Polyester-based film for keeping freshness and packaging bag |
CN110157120A (zh) * | 2019-05-30 | 2019-08-23 | 陈亮 | 一种高强度抑菌阻隔型包装材料的制备方法 |
BR112021024180A2 (pt) * | 2019-06-12 | 2022-01-11 | Perfo Tec B V | Embalagem para conservação de produtos hortifrutícolas de respiração e método |
CN110358153B (zh) * | 2019-07-18 | 2021-01-05 | 江南大学 | 一种壳聚糖双层膜的制备方法及应用 |
CN113402860A (zh) * | 2021-07-16 | 2021-09-17 | 上海海洋大学 | 气体选择透过性包装薄膜及其制备方法 |
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DE4442987C2 (de) * | 1994-12-02 | 1997-04-17 | Henkel Kgaa | Kationische Chitinabbauprodukte |
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2000
- 2000-11-10 EP EP00974936A patent/EP1245617A4/en not_active Withdrawn
- 2000-11-10 WO PCT/JP2000/007965 patent/WO2001036519A1/ja not_active Application Discontinuation
- 2000-11-10 KR KR1020027005196A patent/KR20020060208A/ko active IP Right Grant
- 2000-11-10 US US10/111,374 patent/US6746762B1/en not_active Expired - Fee Related
- 2000-11-10 CN CN00815640A patent/CN1390242A/zh active Pending
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004016686A1 (ja) * | 2002-07-22 | 2004-02-26 | Kureha Chemical Industry Company, Limited | アミノ基含有多糖類を含有する組成物及びそれからなる炭酸ガス選択透過性を有するフィルム |
JP2004131622A (ja) * | 2002-10-11 | 2004-04-30 | Dainichiseika Color & Chem Mfg Co Ltd | キトサン水溶液、その製造方法および物品の被覆方法 |
JP2006509848A (ja) * | 2002-11-12 | 2006-03-23 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 水分および気体浸透性、非多孔性イオノマーフィルム |
JP4634804B2 (ja) * | 2002-11-12 | 2011-02-16 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 水分および気体浸透性、非多孔性イオノマーフィルム |
Also Published As
Publication number | Publication date |
---|---|
CN1390242A (zh) | 2003-01-08 |
KR20020060208A (ko) | 2002-07-16 |
EP1245617A4 (en) | 2003-04-02 |
US6746762B1 (en) | 2004-06-08 |
EP1245617A1 (en) | 2002-10-02 |
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