JP2010042650A - Freshness-retaining film material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a freshness-retaining film material, capable of easily perform housing or wrapping/enclosing while allowing visual confirmation of a housed or wrapped/enclosed product, and retaining freshness over a long period. <P>SOLUTION: The freshness-retaining film material for retaining freshness by wrapping/enclosing includes: a moisture-permeable film having transparency, flexibility and practical use strength as the whole and slight moisture permeability; a freshness-keeping film laminated thereon, the freshness-keeping film including a freshness-keeping material supported and applied onto silica gel or synthetic zeolite on the lower surface of a film having gas barrier property and water absorptivity; and a pressure sensitive bonding layer and a pressure sensitive bonding thin layer laminated respectively on the upper surface of the moisture-permeable film and on the lower surface of the freshness keeping film in an integrated manner. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a freshness-holding film material that can maintain the freshness of seafood, livestock meat, fruits and vegetables over a long period of time and can be easily sealed.

A large amount of plastic film is used in the packaging field, and polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyester or acetates are used as the material. It is progressing in the direction of making the most of its characteristics, and the packaging forms tend to be significantly diversified.
Food packaging is the most used for packaging plastic film, followed by light packaging such as textiles and sundries, pharmaceutical packaging, and heavy packaging such as fertilizer, cement, salt and sugar. .

By the way, as a property necessary for the packaging film material, in addition to the original purpose of protecting the package contents, a function that is easy to use for the user and beautifully useful for sales promotion is required. In other words, the protection of the packaged contents is to protect the product from being altered or damaged while it is consumed from production such as transportation, storage, display, etc., so physical strength such as tensile strength, tear strength or abrasion resistance It is required to have strength, barrier properties against moisture, water, oxygen, gas or ultraviolet rays, stability against temperature / humidity changes and chemicals, and hygienic and odorless harmlessness.
In addition, for food packaging, in addition to simple workability and sealing workability at the time of packaging, transparency is also required so that the freshness and deflation of the packaged product can be confirmed immediately, and of course it is also price-effective. Inexpensive is also important.

  Therefore, the current food packaging is mass-produced and cheap like confectionery, and is made with a laminated film material of a moisture-proof polypropylene film and a heat-sealable polyethylene film, and the required amount is stored and heated. For sealed products and confectionery containing oil, products made of laminated film material with aluminum foil laminated on polypropylene film and polyethylene film on the inner surface are used to prevent oxidation. Is made of a laminate film material made of transparent polyethylene and polypropylene or cellulose film so that the film can be visually recognized.

  On the other hand, with salt, sugar, etc. or grains, etc., the storage weight is also multiple, so it is sufficient in thickness and strength, and waterproof and moisture-proof vinyl chloride, polyethylene or polypropylene film material to make the required storage capacity, The zipper is housed and sealed with a fastener provided in the opening, or the opening is stitched or heat sealed.

On the other hand, vegetables, fruits, seafood, and livestock meat are expensive, and they have a large amount of moisture and carbohydrates, proteins, lipids, and other nutrient sources for bacteria and microorganisms. In fish and shellfish and livestock meat, it is transformed from post-mortem stiffening to softening and self-digestion due to the activity of the enzyme, and the color tone, luster, and tension of the outer shape progress rapidly, and adhere with self-digestion. The rapid growth of fungi and microorganisms is increased, leading to short-term decay.
In addition, in vegetables and fruits, moisture is evaporated and ethylene gas is discharged along with breathing, which promotes wilt and overripening. A phenomenon is also triggered.

  However, in the current seafood, a large amount of ice is mixed with the seafood in the synthetic resin foam molding box to suppress the enzyme action due to low temperature or to suppress the growth of attached bacteria and microorganisms to maintain the freshness. Although it is used for planned delivery, the synthetic resin foam molding box is bulky and multiplex with ice to be mixed, and the transportation cost is enormous, and the disposal of the synthetic resin foam molding box also has a big problem. Furthermore, since it is delivered and exposed to a room temperature open environment during distribution, freshness is lost in a short time due to the activation of the enzyme and the propagation of adhering bacteria such as falling bacteria in the air. Furthermore, although livestock meat is transported at a low temperature from a slaughterhouse and is kept in a low-temperature environment during distribution, the reduction of freshness is promoted by the oxidation of fats and oils and the action of enzymes along with the evaporation of moisture. Even for beef and beef, it is limited to 7 to 13 days, and it will suffer a great deal of damage if left unsold or discarded.

In addition, fruits and vegetables are usually stored in cardboard boxes and put into circulation for the protection of their products. Fruits and vegetables are released with moisture and discharged with ethylene gas, etc. with breathing action. The ripening is accelerated and the freshness is drastically reduced, especially in vegetables, especially leafy vegetables. .
For this reason, fruits and vegetables are also harvested after harvesting and after packaging, although measures are taken to suppress respiratory action and enzyme action by using a refrigerator or car, etc., the distribution market is exposed to a room temperature open environment. Therefore, ripening of fruits and the like, wilting and browning of vegetables are further promoted, and the freshness is significantly reduced.

  In view of such a problem, the inventor has conducted research for maintaining freshness for many years, and as a result, has transparency and flexibility so that seafood, livestock meat, fruits or vegetables to be stored or encapsulated can be immediately recognized. In addition, toughness and water resistance that can withstand practical use, moisture proofing and gas permeable properties, freshness keeping function, and sealing film or pressure sensitive function, and then storing or laminating on a bag. By wrapping and enclosing with a film, it was conceived that storage and wrapping can be performed easily and the freshness can be maintained for a long time, and the present invention has been achieved.

  The present invention provides a freshness-holding film material that is easy to store or encapsulate, can visually recognize seafood, livestock meat, fruits and vegetables that are stored or encapsulated, and can maintain freshness for a long period of time. There is.

  The technical means used to solve the above-mentioned problems is a moisture-permeable film made of a polyamide-based or cellulose-based resin material that maintains transparency, flexibility, and practical use strength as a whole, and has slight moisture permeability. A film made of an ethylene-vinyl alcohol copolymer resin material, an ethylene-vinyl acetate copolymer resin material, or a cellulose acetate resin material that retains gas impermeability and water absorption, and a thiosulfato silver complex or catechin using silica gel or synthetic zeolite as a carrier. , Hinokitiol, quinone derivative, allyl isothiocyanate, moon peach extract or colloidal pectin, and a freshness-maintaining film is applied, and on the upper surface of the moisture permeable film, an acrylic resin material, Polyvinyl ethyl ether resin material or polyvinyl alcohol Or a pressure-sensitive adhesive layer made of a cellulose acetate resin material, and a laminated structure in which a pressure-sensitive adhesive thin layer is applied to the lower surface of the freshness-maintaining film. It exists in a freshness-preserving film material that encapsulates a large amount of seafood, livestock meat or fruits and vegetables.

  Furthermore, the heat sealing film made of a polyethylene material having transparency, flexibility and practical use strength as a whole, and having a heat sealing property, from a slightly moisture-permeable polyamide-based or polyester-based or cellulose-based resin material A film made of an ethylene-vinyl alcohol copolymer resin material, an ethylene-vinyl acetate copolymer resin material, or a cellulose acetate resin material that has a gas-permeable and water-absorbing property and is combined with It consists of a laminated structure with a freshness-maintaining film that supports and coats thiosulfato silver complex, catechin, hinokitiol, quinone derivatives, allyl isothiocyanate, moon peach extract or colloidal pectin using zeolite as a carrier. Fish bag with a lot of water Exists a kind and meat such or fruits and vegetables freshness retaining film material used is hermetically sealed upon storage.

  Since the present invention has the above-described configuration and has transparency and flexibility as a whole, the color, gloss, tension, wilting, browning, etc. of the stored or encapsulated contents can be instantly determined. Producers, distributors and consumers can easily determine the freshness-keeping state, and not only can bags of a desired size and shape be used, but also can be wrapped and wrapped easily.

  In the present invention, the gas barrier due to retention of excess moisture is obtained by combining a gas-impermeable freshness-maintaining film with a moisture-permeable film that not only retains sufficient strength in practical use but also retains a slight moisture permeability. The freshness-maintaining film is made of an ethylene-vinyl alcohol copolymer resin material, an ethylene vinyl acetate copolymer resin material, or a cellulose acetate resin material that retains water absorption. The thiosulfate silver complex that absorbs moisture and does not impair transparency, is excellent in coatability because it retains water absorption, has a large specific surface area due to fine pores, or is used as a synthetic zeolite carrier and is safe for food hygiene. Catechin, hinokitiol, quinone derivatives, allyl isothiocyanate, moon peach extract or colloidal Since it is coated with cutin, the vaporized water vapor from the stored or encapsulated product is also absorbed by the carrier, and the moisture is controlled to release, so the humidity near the product is almost constant. To prevent excessive transpiration of moisture and prevent drying and wilting.

In addition to the antibacterials of bacteria and microorganisms adhering to stored or encapsulated products, various gases generated, especially ethylene gas, are sufficiently adsorbed to prevent over-ripening, and these thiosulfato silver complexes are It also has excellent permeability to the inside of the product and suppresses the enzyme action, so that freshness is maintained for a long time.
The present invention used for enveloping includes a pressure-sensitive adhesive layer made of an acrylic resin material, polyvinyl ethyl ether resin material, polyvinyl alcohol, or cellulose acetate resin material on the upper surface of the moisture permeable film and the lower surface of the freshness maintaining film, and pressure sensitive Since the bonding thin layer is applied, the edges can be tightly adhered and sealed only by encapsulating.

  Catechin with a synthetic zeolite as a carrier, a moisture-permeable film made of a polyamide material that maintains transparency, flexibility and practical use strength as a whole, and a film made of an ethylene-vinyl alcohol copolymer resin material. Alternatively, a freshness-keeping film coated with a moon peach extract is stacked, and a pressure-sensitive joining layer and a pressure-sensitive joining thin layer made of a polyvinyl alcohol resin material are formed on the upper surface of the moisture-permeable film and the lower surface of the freshness-keeping film. A freshness-preserving film material to be used for enveloping, comprising a laminated structure.

The embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of the present invention used for enveloping, and FIG. 2 is an enlarged explanatory view of a freshness maintaining film. The film material 1 as a whole needs to have transparency and flexibility and to maintain practical use strength.
Transparency in such a case is also configured to ensure that the freshness retention state of the seafood, livestock meat, or fruits and vegetables that contain a relatively large amount of water to be encapsulated is confirmed by the distributor as well as the consumer. Transparent film materials and coating materials are indispensable, and the freshness-preserving film material 1 used for encapsulating is suitable for various sizes of seafood, livestock meat, fruits, vegetables, etc. In addition, sufficient flexibility is required in order to cut and encapsulate. As a matter of course, the freshness-holding film material 1 is formed while maintaining the strength that can be used for practical use.

  Thus, the freshness retaining film 1 has a gas barrier property for preventing oxidation to fish and shellfish, livestock meat, fruits and vegetables having a high water content, and the gas barrier property is also lowered when the moisture permeation amount is reduced. For this purpose, a moisture-permeable film 1A made of a polyamide-based resin material or a cellulose-based resin material is used in addition to a strong reinforcement that has a slight moisture permeability and can be used for practical use. Of course, the thickness of the moisture permeable film 1A is also taken into consideration by the material used and the weight of the contents to be encapsulated, but is generally about 20 to 40 μm.

  A freshness maintaining film 1B is stacked below the moisture permeable film 1A. This freshness-maintaining film 1B has gas barrier properties for preventing oxidation of the contents to be encapsulated, and prevents wilting and drying by absorbing moisture transpiration from the contents and adjusting the internal humidity. Deodorant and adsorption due to adsorption of ethylene gas emitted from fruits and vegetables, especially antibacterial properties related to the prevention of overgrowth of attached bacteria and microorganisms, and penetration into the contents At the very least, the enzyme is suppressed, and various functions that enable the maintenance of freshness over a long period of time are retained.

  Accordingly, as a material to be used, a material having excellent gas permeability, so-called gas barrier property, and having adhesion, that is, water absorption, capable of adding various functions is desired. As this specific material, a film made of an ethylene-vinyl alcohol copolymer resin material, an ethylene-vinyl acetate copolymer resin material or a cellulose acetate resin material is suitable, and the bottom surface of the film has a very fine and enormous number of pores. The carrier 1C made of silica gel or synthetic zeolite with a large specific surface area is highly safe and has excellent antibacterial properties against attached bacteria and microorganisms, and has excellent permeability to the contents, and is encapsulated A freshness-maintaining material 1D that suppresses the activity of enzymes and maintains the freshness by impregnating it into livestock meat or fruits and vegetables is applied and applied 1E.

In such a case, the carrier 1C has a smooth coating 1E, and has an average particle size of 2 μm or less, preferably 0.1 to 1.0 μm. From the standpoint of sufficient adsorption of gas or the like, the specific surface area is advantageously at least 200 m ² / g or more. As the freshness maintaining material 1D to be supported, since the silver thiosulfate complex is required to have high chlorine resistance for use in a living environment, the silver ion rich in reactivity to chlorine is anionized to thiosulfato silver complex. Use as Furthermore, since the present invention is a food such as seafood, livestock meat, fruit or vegetables, a natural freshness maintaining material 1D is more desirable from the viewpoint of safety.

For this reason, catechin is mentioned as a natural freshness maintaining material 1D, and it is subdivided into epigallocatechin gallate, epicatechin, epicatechin gallate, epicacatechin or catechin, but the chemical structure contains phenolic hydroxyl groups. It has multiple antibacterial activity against food poisoning bacteria such as Vibrio bacteria and Clostridium botulinum and bacteria such as cholera bacteria, and also has an antioxidant action and a natural pigment browning prevention action, which is extremely suitable.
Furthermore, hinokitiol is also called tropolone with a seven-membered ring structure, and exhibits high antibacterial activity against bacteria as well as fungi, but it is susceptible to photolysis and requires some consideration for use. In addition, the quinone derivative is an ethanol extract from Somune bamboo and retains antibacterial activity against bacteria and fungi, but it is difficult to dissolve in water and requires a slight amount of active agent to be mixed.

In addition, allyl isocyanate is a signignin contained in wasabi and mustard, which is decomposed and produced by the mysilonase enzyme. However, inclusion with microdextrin is desirable because of its unique irritating odor.
Furthermore, moon peach extract is present in the leaves of sannin and has a broad antibacterial and insect repellent spectrum, and in particular, it is thought to penetrate into seafood and livestock meat and have an enzyme activity inhibiting action, and colloidal pectin extracted from citrus fruits Is said to have a similar effect.

The freshness maintaining material 1D selected as described above is coated 1E with a coating component such as polyvinyl alcohol, carbomethyl cellulose, polyvinyl methyl ether and the like, as shown in FIG.
Thus, the freshness maintaining film 1B is stacked on the moisture permeable film 1A, and the freshness maintaining material 1D is coated 1E on the lower surface of the freshness maintaining film 1B. It is necessary to impart a pressure-sensitive bonding function from the top.

This pressure-sensitive bonding function applies the principle of pressure-sensitive adhesives. For this purpose, pressure-sensitive bonding components that demonstrate the pressure-sensitive bonding function include acrylic resin materials, polyvinyl ethyl ether resin materials, and polyvinyl alcohol resin materials. Or an acetic acid and a cellulose resin raw material are mentioned.
When forming the pressure-sensitive bonding layer 1F, a slightly thick film is formed on the upper surface of the moisture permeable film 1A, preferably a thickness of about 10 to 15 μm, and the lower surface of the coating 1E of the freshness maintaining film 1B. Is as thin as possible, preferably moisture, odor or gas generated from seafood, livestock meat, fruits, vegetables, etc. formed and encapsulated in a thickness of about 1 to 5 μm. Moreover, the freshness-keeping film material 1 to be used for enveloping is formed by the laminated structure in which the pressure-sensitive bonding thin layer 1G is applied.

  FIG. 3 is an explanatory view of the freshness-preserving film material 10 using bag making. Unlike the case of small and light packaging such as enveloping, the case of using the bag making can be used after being stored in large quantities and in multiple layers. In order to provide it, after storage, it is normally sealed with a heat seal 20.

  For this reason, the freshness-keeping film 10 by using the bag-making method maintains transparency, flexibility and strength that can be used for practical use as a whole, and a slight transparency to the heat-sealing film 11 made of a polyethylene resin material having heat-sealing properties. A moisture permeable film 12 made of a polyamide or polyester resin material having moisture, or a cellulose resin material is disposed, and further, an ethylene-vinyl alcohol copolymer resin having gas impermeability so-called gas barrier property and water absorbability, From a film made of an ethylene-vinyl acetate copolymer resin material or a cellulose acetate resin material, using silica gel or synthetic zeolite as a carrier 14, thiosulfato silver complex, catechin, hinokitiol, quinone derivative, allyl isothiocyanate, moon peach extract or colloidal pectin Become fresh After having supported thereon a maintenance member 15 is made of a layered structure of the freshness keeping film 13 the coating 16 is made.

The freshness-keeping film 10 by using such a bag is also composed of the moisture-permeable film 2, the freshness-maintaining film 3, the moisture-permeable film 12 and the freshness-maintaining film 13 of the freshness-holding film 1 used for enveloping. Become.
As shown in FIG. 4, in FIG. 4A, when encapsulated, the pressure sensitive bonding layer 1F formed on the surface of the freshness-keeping film 1 is formed on the back surface of the freshness-keeping film 1. The formed pressure-sensitive bonding thin layer 1G is bonded and sealed, and in the bag making, the opening is sealed by the heat seal 20 after being housed therein.

  In the case of enveloping, it can be used by cutting it into a long shape with the required width and length. Can be used sealed.

  It is explanatory drawing of this invention used for enveloping.   It is expansion explanatory drawing of a freshness maintenance film.   It is explanatory drawing of this invention used for bag making.   It is a use mode figure of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Freshness maintenance film material used for enveloping 1A Moisture permeable film 1B Freshness maintenance film 1C Carrier 1D Freshness maintenance material 1E Application 1F Pressure-sensitive joining layer 1G Pressure-sensitive joining thin layer 10 Freshness-keeping film material 11 used for bag making 11 Heating Seal film 12 Moisture permeable film 13 Freshness maintenance film 14 Carrier 15 Freshness maintenance material 16 Application 20 Heat seal

Claims (6)

  Maintains freshness with silica gel or synthetic zeolite as a carrier on the bottom of the film, which maintains transparency, flexibility and strength for practical use as a whole, and has a slight moisture permeability and maintains gas barrier properties and water absorption. A freshness-maintaining film that supports and is applied to the material is stacked, and a pressure-sensitive adhesive layer is applied to the upper surface of the moisture-permeable film and a pressure-sensitive adhesive thin layer is applied to the lower surface of the freshness-maintaining film to form an integral laminate A freshness-preserving film material characterized by maintaining freshness by encapsulating.   The whole maintains transparency, flexibility and practical use strength, and a heat permeable film with a slight moisture permeability is stacked on the heat seal film, and a freshness maintaining material is supported on the lower surface using silica gel or synthetic zeolite as a carrier. In addition, a freshness-maintaining film material, which is formed by integrally laminating a freshness-maintaining film that has been applied, and is stored in a suitable bag and then heat-sealed to maintain freshness.   The freshness-keeping film material according to claim 1 or 2, wherein the moisture-permeable film is made of a polyamide-based or cellulose-based resin material.   The freshness-keeping film material according to claim 1 or 2, wherein the freshness-maintaining film is made of an ethylene-vinyl alcohol copolymer resin material, an ethylene-vinyl acetate copolymer resin material, or a cellulose acetate resin material. The freshness-preserving film material according to claim 1 or 2, wherein the silica gel or synthetic zeolite as a carrier has a particle size of 2 µm or less and a specific surface area of at least 200 m ² / g or more.   The freshness-keeping film according to claim 1 or 2, wherein the freshness maintaining material is thiosulfato silver complex, catechin, hinokitiol, quinone derivative, allyl isocyanate, moon peach extract or colloid pectin.

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