WO2004020309A1 - 引裂き性を有するガスバリア性包装袋 - Google Patents
引裂き性を有するガスバリア性包装袋 Download PDFInfo
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- WO2004020309A1 WO2004020309A1 PCT/JP2003/010893 JP0310893W WO2004020309A1 WO 2004020309 A1 WO2004020309 A1 WO 2004020309A1 JP 0310893 W JP0310893 W JP 0310893W WO 2004020309 A1 WO2004020309 A1 WO 2004020309A1
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- WIPO (PCT)
- Prior art keywords
- film
- packaging bag
- gas barrier
- layer
- tear linearity
- Prior art date
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Classifications
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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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- 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
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/582—Tearability
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
-
- 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
- B32B2439/40—Closed containers
- B32B2439/46—Bags
-
- 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
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
Definitions
- the present invention relates to an easily tearable gas barrier packaging bag having transparency and gas barrier properties, and more particularly, to a gas barrier packaging bag having a straight bow I tear that can be opened by tearing straight.
- packaging materials used for packaging foods, non-foods, pharmaceuticals, precision electronic components, and the like are required to have various functions, such as content protection, convenience, merchantability, and other functions.
- polymer resin compositions such as stretched polypropylene (KOP), polyethylene terephthalate (KPET), or ethylene butyl alcohol copolymer (EVOH) coated with vinylidene chloride resin, which is generally said to have relatively high gas barrier properties, have been used.
- Convenience includes openability, resealability, light weight, portability, etc., and commerciality includes transparency, versatility in form, and the like.
- a metal foil made of a metal such as aluminum as a gas barrier material, or a packaging material using such a metal-deposited film is hardly affected by temperature and humidity and has excellent gas barrier properties.
- drawbacks such as the inability to check the contents, the disposal of the material after use must be treated as non-combustible, and the inability to use a metal detector when inspecting the contents. .
- inorganic oxides such as magnesium oxide, silicon oxide, aluminum oxide, and tin oxide are formed on a polymer film by means of a vacuum deposition method or a sputtering method.
- a film with a vapor deposited film has been developed by U.S. Pat. No. 86, JP-B-63-28017). This film is known to have transparency and gas barrier properties against oxygen, water vapor, etc., and is suitable as a packaging material having both transparency and gas barrier properties that cannot be obtained with a metal vapor-deposited film. It has been.
- a vapor-deposited film suitable for the above-mentioned packaging material is rarely used as a vapor-deposited film alone, and is subjected to post-processing after vapor deposition as a packaging container or a packaging material.
- it is laminated with another film to form a laminate that can be processed into a packaging bag, and processed into a bag through the bag making process.
- the sealant layer made of a thermoplastic resin layer is provided while maintaining the transparency and the gas barrier property inherent in the vapor-deposited film, and the sealant layers are thermally fused to each other by a heat sealing method.
- packaging bags used for packaging foods, pharmaceuticals, precision electronic components, etc. are required to be easily opened by ordinary consumers without using scissors or knives, except in special cases.
- the packaging bag made from the above-mentioned vapor-deposited film laminate is generally made of a biaxially stretched polymer material from the viewpoint of suitability for vapor deposition on the substrate to be vapor-deposited, the base film Packaging bags using a substrate that is difficult to tear by itself have the problem that they are difficult to open and cannot be easily opened.
- even if a notch or the like is cut into the edge of the packaging bag to improve the opening property,
- it since it is stretched biaxially, it was torn from a notch 24 provided on the edge of the four-sided heat-sealed portion 23 of the packaging bag 20 made of a vapor-deposited film laminate as shown in FIG.
- the present invention provides a packaging bag that is colorless, transparent, has excellent transparency, and has high gas barrier properties, and is easily opened to tear the bag linearly, that is, has excellent tear linearity, and can be easily torn by hand when opened.
- the purpose is to provide.
- the packaging bag of the present invention is configured as follows.
- the gas barrier packaging bag having a tear linearity of the present invention comprises a base film made of a transparent polymer material having a tear linearity, and a gas barrier layer made of a mixture of a polybutyl alcohol resin and an inorganic layered compound, sequentially.
- a laminated film is used in which a sealant layer is laminated on one of the surfaces via an adhesive layer.
- the inorganic layered compound may be montmorillonite.
- the gas-barrier packaging bag having tear linearity of the present invention is obtained by sequentially laminating a vapor-deposited thin film layer made of an inorganic oxide on a base film made of a transparent polymer material having tear linearity.
- a laminated film is used in which a sealant layer made of a heat-fusible resin is laminated on the surface.
- the gas-barrier packaging bag having tear linearity of the present invention in the configuration described in (3) above, wherein the base film made of the transparent polymer material having tear linearity is a polyester film.
- the film surface roughness (R a) may be 1S 2 nm or less.
- the vapor-deposited thin film layer made of an inorganic oxide may be aluminum oxide, silicon oxide, or a mixture thereof.
- the material of the vapor-deposited thin film layer made of an inorganic oxide is specified, so that high gas barrier properties are exhibited.
- the gas-barrier packaging bag having a tear linearity of the present invention is the gas barrier packaging bag according to the above (3), wherein a base film made of a transparent polymer material having a tear linearity is deposited on a base film made of an inorganic oxide.
- An aqueous solution or a water / alcohol mixed solution containing a water-soluble polymer and (a) at least one metal alkoxide and its hydrolyzate or (b) tin chloride as a main component is applied.
- a laminated film is used in which dried gas barrier coating layers are sequentially laminated, and a sealant layer made of a heat-fusible plastic resin is laminated on one of the surfaces. As a result, high gas barrier properties are exhibited.
- the gas-barrier packaging bag having tear linearity according to the present invention is characterized in that: ),
- the metal alkoxide may be tetraethoxysilane.
- the gas-barrier packaging bag having tear linearity according to the present invention is characterized in that:
- the water-soluble polymer may be polyvinyl alcohol.
- a water-soluble polymer is specified, so that a high gas-barrier property is exhibited.
- the gas-barrier packaging bag having tear linearity of the present invention has the above (1)
- both end faces or a plurality of the laminated films are overlapped to form a heat-sealed portion by heat-sealing the surfaces of the sealant layers, and the base material is provided on an edge of the heat-sealed portion.
- the cut may be provided in the same direction as the direction having the tear linearity. This makes it easy to tear open the gas barrier packaging bag which is transparent and has excellent gas barrier properties and which has tear linearity from the cut.
- the gas-barrier packaging bag having tear linearity of the present invention is the gas barrier packaging bag according to (1) or (3), wherein the base film made of the transparent polymer material having tear linearity is: A uniaxially or biaxially stretched polyester film having tear linearity in one direction, which may be a film made of polybutylene terephthalate containing polytetramethylene dalicol and polyethylene terephthalate.
- the gas barrier packaging bag having a tear linearity of the present invention is the gas barrier packaging bag according to the above (1) or (3), wherein the base film made of the transparent polymer material having a tear linearity comprises: Polybutylene terephthalate (modified PBT) containing 5 to 20% by weight of polytetramethylene dalichol units having a molecular weight of 600 to 4000 and polyethylene terephthalate (PET), and the weight ratio of PET to modified PBT is 70 30 to 955 It may be a polymer film obtained by mixing at a ratio.
- modified PBT Polybutylene terephthalate
- PET polyethylene terephthalate
- the material of the base film is specified, it is excellent in transparency, heat-resistant dimensional stability, and tears open linearly. It is possible to do.
- FIG. 1 is a side sectional view showing an example of a laminated film used for a gas barrier packaging bag having tear linearity according to the present invention.
- FIG. 2 is a front view showing an example of the gas barrier packaging bag having tear linearity according to the present invention.
- 3 (a) and 3 (b) are side sectional views showing another example of the laminated film used for the gas barrier packaging bag having tear linearity of the present invention.
- FIGS. 4 (a) and 4 (b) are front views showing another example of the gas-barrier packaging bag having tear linearity of the present invention.
- FIG. 5 is a plan view of a conventional gas barrier packaging bag.
- gas barrier packaging bag of the present invention will be described in detail below based on one embodiment.
- FIG. 1 is a side cross-sectional view of a laminated film of one embodiment used for making a gas-barrier packaging bag having tear linearity according to the present invention.
- the base film 1, the gas barrier layer 2, the adhesive layer 3, and the sealant layer 4 are laminated in this order in the thickness direction.
- a uniaxial or biaxially stretched polyester film having a tear linearity in one direction can be used as the base film 1 used for the gas-barrier packaging bag having a tear linearity of the present invention.
- a film made of a high molecular weight material of polybutylene terephthalate and polyethylene terephthalate can be used. More specifically, it contains 5 to 20% by weight of a polytetramethylene dalicol unit having a molecular weight of 600 to 400.
- modified PBT modified PBT
- PET polyethylene terephthalate
- a polymer film mixed at a ratio of 0 to 955 can be used.
- PET constituting the base film 1 of the present invention can be obtained by a known production method, that is, a transesterification reaction method of dimethyl terephthalate and ethylene glycol, or a direct esterification method of terephthalic acid and ethylene glycol. It is obtained by melt polymerization or solid phase polymerization after obtaining the above. Other components can be copolymerized as long as the effects of the present invention are not impaired.
- copolymerization components include isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, 5-sodium sulfoisophthalic acid, succinic acid, adipic acid, sebacic acid, dodecane diacid, dimer acid, maleic anhydride, Dicarboxylic acids such as maleic acid, fumaric acid, itaconic acid, citraconic acid, mesaconic acid, cyclohexanedicarboxylic acid, 4-hydroxybenzoic acid, E-hydroxycarboxylic acids such as hydroprolactone and lactic acid, 1, 3- Glycols such as pandiol, 1,6-hexanediol and cyclohexanedimethanol, trimellitic acid, trimesic acid, and pyromeric Examples include polyfunctional compounds such as tonic acid, trimethylolpropane, glycerin, and pentaerythritol.
- the molecular weight of the polytetramethylene glycol in the present invention is preferably from 600 to 4,000, more preferably from 1,000 to 3,000, and still more preferably from 1,000 to 2,000. Molecular weight
- Modified P BT in the present invention preferably contains polytetramethylene da recall from 5 to 20 mass 0/0, more preferably from 1 0 to 20 wt%, 10 to 1 5 mass% is more preferred. If the content of polytetramethylene dalicol is less than 5% by mass, the resulting film does not exhibit tear linearity, and if it exceeds 20% by mass, the resulting film has mechanical strength and dimensional stability. In addition, the performance of the film, such as haze, is reduced, and it is difficult to obtain stable tear linearity of the film.
- Base film 1 in the present invention the weight ratio of PET and modified PBT,
- PE TZ denaturation ⁇ ⁇ 70 ⁇ 30 to 95/5, preferably 80 20 to
- the ratio of PET to modified PBT is preferably within the above range.
- the surface of the base film 1 may be subjected to a corona treatment, a low-temperature plasma treatment, or an ion bombardment treatment as a pre-treatment in order to improve the adhesion of the vapor-deposited thin film. May be applied.
- a primer layer may be provided on the base film 1 for the purpose of increasing the adhesion when the gas barrier layer 2 is provided and preventing the lamination strength from being deteriorated after filling the contents.
- the primer resin used for the primer layer for achieving the above object is a simple substance selected from polyester resins, isocyanate resins, epoxy resins, and acrylic resins, or a mixture of two or more kinds.
- the organic solvent that dissolves the primer resin is not particularly limited as long as it can dissolve the resin, and examples thereof include esters such as ethyl acetate and butyl acetate, methyl ethyl ketone, and methyl isobutyl ketone.
- esters such as ethyl acetate and butyl acetate, methyl ethyl ketone, and methyl isobutyl ketone.
- ketones, aromatic hydrocarbons such as toluene and xylene alone or arbitrarily blended can be used.
- a mixture of toluene and methyl ethyl ketone is preferred from the viewpoint of coating film processing and odor.
- the thickness of the base film 1 is not particularly limited, but considering the suitability as a packaging material, that other layers may be laminated, and the workability when forming the vapor-deposited thin film layer 12. Practically, it is preferable that the thickness be in the range of 3 to 200 ⁇ and 6 to 30 ⁇ m depending on the application.
- the gas barrier layer 2 is composed of a mixture of a polybutyl alcohol resin and an inorganic layered compound, and the blending ratio of the polybutyl alcohol resin and the inorganic layered compound is: When the state compound is in the range of 60_40 to 4060, high gas barrier properties, particularly high oxygen gas barrier properties can be obtained.
- the polyvinyl alcohol resin is generally obtained by vulcanizing polyvinyl acetate, and has several tens percent of acetic acid groups remaining.
- a so-called partially-modified polyvinyl alcohol resin has only a few percent of acetic acid groups remaining. It includes up to polyvinyl alcohol resin and is not particularly limited.
- the inorganic layered compound include a kaolinite group, a smectite group, and a mica group. Among these, smectites such as montmorillonite, hectrite, and savonite are preferable, and a resin is taken in between layers of the inorganic layered compound to easily form a complex.
- the gas barrier layer 2 is applied by a known method such as a gravure coating method or a Rhono-recoat method, and its thickness is preferably in the range of 0.1 to 1.0 ⁇ m in a dry state.
- a solvent type urethane type adhesive or a solventless type urethane type adhesive is often used.
- these adhesives there are a two-component mixed type in which a base material having a hydroxyl group and a curing agent having an isocyanate group are mixed and used, and a one-component type in which an adhesive having an isocyanate group is used alone.
- the dry lamination method is usually used, and the coating amount is preferably 0.5 to 5 g / m- (dry state).
- the sealant layer 4 is made of a low-density polyethylene resin, a linear low-density polyethylene resin, a medium-density polyethylene resin, a high-density polyethylene resin, an ethylene-based resin such as an ethylene-polyolefin copolymer resin, or a homopolypropylene resin.
- ethylene-based resin such as an ethylene-polyolefin copolymer resin, or a homopolypropylene resin.
- Propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene- ⁇ -olefin copolymer, and other polypropylene-based resins can be selected, and these olefin-based resins can be graft-polymerized.
- a modified polyolefin resin modified by acid can also be used.
- the above-mentioned polyolefin resin may be used alone or in a blend of two or more.
- the lamination method is a method of melt-extruding and laminating the various resins, or a method of laminating a film made of the resin by a known method such as dry laminating.
- the thickness is appropriately selected, but a thickness of about 15 to 101 ⁇ is used.
- FIG. 2 is a front view showing an example of a gas-barrier packaging bag having tear linearity according to the present invention.
- a four-sided seal bag 20 is formed by laminating both end faces or a plurality of the laminated films 10, The four sealant layers of 10 are heat-sealed together to form heat-sealed portions 21a, 21b, 21c, and used as a laminated film on any edge of the heat-sealed portion.
- the cuts 22 are provided in the same direction as the direction having the tear linearity of the base film thus formed.
- the four-side seal bag 20 has an opening 21 d for filling the contents. Therefore, this four-sided seal bag 20 is filled with contents and the like, and the opening 21 d is heat-sealed. It can be torn by hand from the notch 22 to the end and can be easily opened.
- Examples of the form of the gas barrier packaging bag having tear linearity include a three-side seal bag, a pillow bag, a gusset bag, and a three-dimensional bag in addition to a four-sided seal bag.
- the gas barrier packaging bag having the same will be described in detail below based on another embodiment.
- FIGS. 3 (a) and 3 (b) are cross-sectional views illustrating an example of a vapor-deposited film laminate constituting the gas-barrier packaging bag having tear linearity according to the present invention, and FIGS. It is a front view explaining the gas barrier packaging bag which has tear linearity of the present invention.
- the laminated film 10 used for making the gas barrier property packaging bag having tear linearity of the present invention is a base film 1 made of a transparent polymer material having tear linearity. 3.
- a vapor-deposited thin film layer 12 made of an inorganic oxide and a gas-barrier coating layer 11 are sequentially laminated on one surface of the substrate film 3, and a sealant layer 14 is laminated on the other surface of the substrate film 13. It has become.
- FIG. 3B shows a configuration in which the sealant layer 14 is laminated on the gas barrier coating layer 11.
- the gas-barrier packaging bag having tear linearity according to the present invention is obtained by laminating the laminated films 10, and using a sealing bag making machine on all four sides to perform heat-sealing such as heat sealing.
- Heat-sealed parts 21a, 21b, 21c to form a three-side sealed packaging bag, and after filling with the contents, heat-sealing, etc.
- a heat-sealed portion 21 e is formed by heat-sealing, so that a gas-barrier packaging bag 20 having tear linearity and sealed in all directions can be obtained.
- the packaging bag 20 shown in Fig. 4 (a) obtained above is shown in Fig. 3 (a).
- a base film 13 made of a transparent polymer material having tear linearity is formed of a vapor-deposited film laminate in which a vapor-deposited thin film layer 12 made of an inorganic oxide is formed on one surface, a packaging bag Opening property of 20; that is, as shown in Fig. 4 (b), when tearing from the notch 24 provided at the edge of the heat seal portion 21e of the packaging bag 20, it is easy to tear in the tearing direction of tear linearity. Since it can be torn in a straight line, a gas barrier packaging bag having excellent tear linearity can be provided. As a result, the packaging bag can be opened neatly with a small force, and the problem of breaking the solid matter of the contents at the time of opening, or scattering and contaminating the contents when the contents are liquid, can be prevented.
- a vapor-deposited thin film layer 12 made of an inorganic oxide is formed on one surface of the base film 13. Further, an aqueous solution or water containing at least one of a water-soluble polymer and (a) one or more metal alkoxides and hydrolysates thereof or (b) tin chloride on the deposited thin film layer 12.
- a gas barrier coating layer 11 is formed by applying and drying a coating agent mainly composed of a Z alcohol mixed solution, and a sealant layer 14 made of a heat-fusible resin is formed on the other surface of the base film 13. Is formed. In FIG. 3 (b), the sealant layer 14 is laminated on the gas barrier coating layer 11.
- the base film 13 in the present invention the same film as the base film 1 used in the description of FIG. 1 is used. If necessary, a primer layer is formed on the base film 13 to improve the adhesion when the vapor-deposited thin film layer 12 made of an inorganic oxide is provided and to prevent the deterioration of the lamination strength after filling the contents. It can also be provided.
- the primer resin used for the primer layer for achieving the above object may be a polyester resin alone or a mixture of at least one resin selected from an isocyanate resin, an epoxy resin, and a melamine resin. Is a mixture of
- the organic solvent for dissolving the primer resin is not particularly limited as long as it can dissolve the resin.
- examples thereof include esters such as ethyl acetate and butyl acetate, methyl ethyl ketone, and methyl isobutyl ketone.
- ketones, and aromatic hydrocarbons such as toluene and xylene alone or arbitrarily blended.
- a mixture of toluene and methyl ethyl ketone is preferred from the viewpoint of coating film processing and odor.
- the thickness of the transparent primer layer is not particularly limited as long as a uniform coating film can be formed, but is generally in the range of 0.01 / zm to l. ⁇ , particularly preferably 0.1 ⁇ m. Preferably, it is in the range of ⁇ to 0.5 ⁇ m.
- a known printing method such as an offset printing method, a gravure printing method, a silk screen printing method, or a known coating method such as a roll coat, a knife edge coat, or a gravure coat may be used. it can. Drying conditions may be those generally used.
- the base film 13 of the present invention is preferably a film having excellent smoothness and a small amount of additives, and preferably has a film surface roughness (R a) of 2 nm or less. Thereby, improvement and stability of the barrier property after the vapor deposition can be obtained.
- the vapor-deposited thin film layer 12 made of an inorganic oxide in the present invention is composed of a vapor-deposited film of an inorganic oxide such as magnesium oxide, silicon oxide, aluminum oxide, tin oxide, etc., and has transparency and oxygen, water vapor or the like. Has gas barrier properties If it is.
- magnesium oxide has particularly excellent transparency and gas barrier properties.
- the deposited film of silicon oxide and aluminum oxide has sufficient transparency, and is excellent in gas barrier properties and water resistance.
- the vapor-deposited thin film layer 12 of the present invention is not limited to inorganic oxides of magnesium oxide, silicon oxide, aluminum oxide, and tin oxide, and any material that meets the above conditions can be used.
- the optimum thickness of the vapor-deposited thin film layer 12 varies depending on the type and composition of the inorganic substance used, but it is generally desirable that the thickness be in the range of 5 to 300 nm, and the value is appropriately selected. You. However, if the film thickness is less than 5 nm, the entire surface of the substrate 2 may not be a film or the film thickness may not be sufficient, and the function as a gas barrier material may not be sufficiently performed. If the film thickness exceeds 300 nm, the thin film cannot maintain flexibility, and the thin film may be cracked due to external factors such as bending and stretching after the film is formed.
- a resistance heating method such as a resistance heating method, a high-frequency induction heating method, an electron beam heating method, an electron impact heating method, a flash evaporation method, and a laser evaporation method.
- other thin film forming methods such as a sputtering method such as an ion beam sputter and a magnet mouth butter, and an ion plating method can be used.
- the vacuum evaporation method is currently the best, and it is preferable that the heating means of the vacuum evaporation apparatus using the vacuum evaporation method be an electron beam heating method.
- the plasma assist method and the ion beam assist method it is possible to use the plasma assist method and the ion beam assist method.
- the gas barrier coating layer 11 according to the present invention has a high gas barrier property. It is provided on the vapor-deposited thin film layer 12 made of an inorganic oxide in order to provide and protect the vapor-deposited film.
- the gas barrier coating layer 11 comprises an aqueous solution containing at least one of a water-soluble polymer and (a) at least one metal alkoxide and a hydrolyzate or (b) tin chloride.
- a coating agent mainly composed of a water / alcohol mixed solution.
- the water-soluble polymer used for the coating agent for forming the gas barrier coating layer 11 in the present invention is polyvinyl alcohol, polyvinylpyrrolidone, starch, methinoresenorelose, canolepoxy methinoresenorelose, and luginic acid. Sodium and the like.
- PVA Polyvinyl alcohol
- the PVA referred to here is generally obtained by vulcanizing polyvinyl acetate, and has several tens percent of acetic acid groups remaining, from so-called partially modified PVA to complete PVA having only a few percent acetic acid groups remaining. And is not particularly limited.
- tin is stannous chloride (S n C 1 2) chloride, stannic (S n C 1 4) chloride or may be a mixture thereof, is Rukoto be used in hydrate in anhydrous it can.
- metal alkoxide Te tiger silane [S i (OC 2 H 5 ) 4] triisopropoxyaluminum [A 1 (0 - 2 ' - C 3 H And M (OR) n (M; metals such as S i, T i, A 1, and Z r, and R; alkyl groups such as CH 3 and C 2 H 5 ).
- tetraethoxysilane is preferable since it is relatively stable in an aqueous solvent after hydrolysis.
- each of the above-mentioned components can be added to the coating agent alone or in combination of several, and as long as the gas barrier properties of the coating agent are not impaired, an isocyanate compound, a silane coupling agent, or a dispersing agent, a stabilizer, a viscosity adjusting agent
- Known additives such as an agent and a coloring agent can be added.
- an isocyanate compound added to a coating agent has two or more isocyanate groups (NCO groups) in its molecule.
- NCO groups isocyanate groups
- TTI triphenyl methane triisocyanate
- TMXDI tetramethylxylylene diisocyanate
- the coating agent As a method for applying the coating agent, conventionally known means such as a commonly used dive method, a mouth coating method, a screen printing method, a spray method, and a gravure printing method can be used.
- the thickness of the coating depends on the type of coating agent, processing machine and processing conditions. When the thickness after drying is less than 0.1 / zm, it is not preferable because a uniform coating film cannot be obtained and a sufficient gas barrier property cannot be obtained. On the other hand, if the thickness exceeds 50 ⁇ , there is a problem because cracks are easily generated in the film. Preferably 0.
- 0.1 is preferably in the range of 1 to 50 ⁇ m, more preferably 0.1 to 50 ⁇ m
- Base film made of transparent polymer material having the above tear linearity 1 The laminated film, in which a vapor-deposited thin film layer composed of an inorganic oxide and a gas barrier coating layer are laminated in this order on 3 and a sealant layer composed of a heat-fusible plastic resin is laminated on one of the surfaces, has a water vapor barrier property of 5. It shows high gas barrier properties with g / n ⁇ ay or less and oxygen barrier properties of 1 m1 / m ⁇ / day / atm or less.
- a printing layer can be laminated on the outer surface of the gas barrier coating layer 11.
- the printing layer is formed for practical use as a packaging bag or the like, and includes various pigments such as known urethane-based, acrylic-based, nitrocellulose-based and rubber-based ink binder resins.
- This is a layer composed of ink to which additives such as an extender, a plasticizer, a desiccant, and a stabilizer are added, on which characters, pictures, and the like are formed. In consideration of environmental suitability, it is more preferable to use an ink composed of a biodegradable resin.
- a known printing method such as offset printing, gravure printing, or silk screen printing, or a known coating method such as roll coating, knife edge coating, or gravure single coating may be used. it can.
- the thickness may be 0.1 to 2.0 / zm.
- thermoplastic resin as the sealant layer 4 used in the description of FIG. 1 is used with the same specifications.
- the laminated films constituting the gas barrier packaging bag having the tear linearity described above are superimposed, and the sealing portion is formed by heat sealing such as a heat sealing method on all four sides by a seal bag making machine, thereby forming a tear linearity.
- a gas-barrier packaging bag (see Fig. 4) having the following characteristics can be obtained.
- a sealant layer can be provided at the required location so that it can be used for packaging with pillows and gussets, and the bag making process can be selected according to the purpose of packaging, such as a vertical pillow making machine or a gusset making machine.
- a gas barrier packaging bag having tear linearity can be obtained. Wear.
- Example 1 the effect of a gas barrier packaging bag using a laminated film in which a base film, a gas barrier layer, an adhesive layer, and a sealant layer were laminated in the thickness direction in the order of thickness was confirmed.
- Example 2 as a laminated film, a vapor-deposited thin film layer made of an inorganic oxide and a gas barrier coating layer were sequentially laminated on one surface of a substrate film, and a sealant layer was formed on the other surface of the substrate film.
- the purpose of this study is to confirm the effect of the gas barrier packaging bag using the laminated product.
- a biaxially stretched polyester film having a thickness of 12 ⁇ m and having tear linearity in one direction (Unitichika Co., Ltd., product name: Enbrett)
- Two laminated films 1 are superposed on each other, and the surfaces of the linear low-density polyethylene films are heat-sealed to form a heat-sealed part, creating a four-sided sealed bag with internal dimensions of 20 Omm X 30 Omm. Then, a cut was made in the same direction as the direction in which the PC film had tear linearity, to produce a gas barrier packaging bag having tear linearity of the present invention.
- Example 2 Gas barrier properties for comparison in the same manner as in Example 1 except that a general-purpose biaxially stretched polyester film (Toray Industries, Inc., trade name: Lumirror) having a thickness of 1 2 // m was used as the base film 1.
- a packaging bag was created.
- a gas barrier for comparison was prepared in the same manner as in Example 1, except that a general-purpose biaxially stretched nylon film having a thickness of 15 ⁇ (Unitika, trade name: emblem) was used as the base film 1.
- the packaging bag was made. ⁇ Evaluation>
- the tear amount of the front film and the back film was the same, and the film was torn linearly.
- the gas barrier packaging bags of Comparative Examples 1 and 2 differ in the amount of tearing (mm) between the front film and the back film, and tear smoothly until the end. Did not. From these facts, it was found that the gas barrier packaging bag of Example 1 had a good opening property because the base film 1 used had tear linearity in the tearing direction.
- a 12- ⁇ m-thick PET polymer film (PC film, manufactured by Unitika Ltd.) composed of a mixture of transparent ⁇ T and modified PBT is not shown on one side.
- Aluminum oxide was deposited to a thickness of about 20 nm by a vacuum deposition apparatus using a line heating method to form a deposited thin film layer 12.
- a coating agent having the following composition is applied on the vapor-deposited thin film layer 12 with a bar coater, and dried at 120 ° C for 1 minute with a drier to obtain a gas barrier coating layer 1 having a thickness of 0.3 ⁇ .
- a non-stretched polypropylene film with a thickness of 30 ⁇ m is formed as a heat seal layer 14 by a dry laminating method using a two-component curing type urethane adhesive.
- a laminated film 10 was laminated on the other surface of 13 to constitute the gas barrier packaging bag having tear linearity of the present invention. (See Fig. 3) (Composition of coating agent)
- the laminated films 10 were overlaid, and bag making was carried out using a four-side seal bag making machine, thereby producing a gas barrier packaging bag 20 having tear linearity of the present invention shown in FIG. 4 (a).
- PET polymer film (Unitichika) made by mixing T with modified PBT
- the water vapor transmission rate and the oxygen transmission rate of a gas barrier coating layer 11 having a thickness of 0.3 ⁇ formed on the vapor-deposited thin film layer 12 were measured in the same manner. As a result, they were 3.0 g / m 2 / day, 0.5 m 1 / m 2 / day Z atm. Vapor deposition constituting gas barrier packaging bag having tear linearity of the present invention The film laminate had excellent gas barrier properties.
- the gas-barrier packaging bag having tear linearity of the present invention has excellent gas-barrier properties and can be easily torn linearly.
- the gas-barrier packaging bag having tear linearity is useful for an easily tearable gas-barrier packaging bag having transparency and gas barrier properties. Suitable for packaging bags that tear open.
Landscapes
- Laminated Bodies (AREA)
- Bag Frames (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004532743A JPWO2004020309A1 (ja) | 2002-08-29 | 2003-08-28 | 引裂き性を有するガスバリア性包装袋 |
AU2003261779A AU2003261779A1 (en) | 2002-08-29 | 2003-08-28 | Tearable gas barrier packaging bag |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2002-250644 | 2002-08-29 | ||
JP2002250644 | 2002-08-29 | ||
JP2002309377 | 2002-10-24 | ||
JP2002-309377 | 2002-10-24 |
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WO2004020309A1 true WO2004020309A1 (ja) | 2004-03-11 |
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PCT/JP2003/010893 WO2004020309A1 (ja) | 2002-08-29 | 2003-08-28 | 引裂き性を有するガスバリア性包装袋 |
Country Status (3)
Country | Link |
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JP (1) | JPWO2004020309A1 (ja) |
AU (1) | AU2003261779A1 (ja) |
WO (1) | WO2004020309A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006150617A (ja) * | 2004-11-25 | 2006-06-15 | Unitika Ltd | ポリエステルフィルム積層体、およびこれを用いてなるガスバリア性易開封包装袋 |
JP2006175728A (ja) * | 2004-12-22 | 2006-07-06 | Unitika Ltd | 分包袋用積層フィルムおよびそれからなる分包袋 |
JP2007230123A (ja) * | 2006-03-02 | 2007-09-13 | Toppan Printing Co Ltd | 強密着ガスバリア性積層フィルムおよびその製造方法 |
JP2008105283A (ja) * | 2006-10-26 | 2008-05-08 | Dainippon Printing Co Ltd | 直線引き裂き性ガスバリア性積層フィルム |
JP2008114444A (ja) * | 2006-11-02 | 2008-05-22 | Toppan Printing Co Ltd | 透明複層フィルムの製造方法及びその方法で製造したガスバリア性透明複層フィルム並びに封止フィルム |
GB2452086A (en) * | 2007-08-24 | 2009-02-25 | Sun Chemical Ltd | Gas barrier materials containing PVA and/or EVOH with clay |
CN103523345A (zh) * | 2013-10-20 | 2014-01-22 | 江苏申凯包装高新技术股份有限公司 | 可发热碳晶片三边封包装袋 |
JP2016117159A (ja) * | 2014-12-18 | 2016-06-30 | 大日本印刷株式会社 | シーラントフィルム |
US10654631B2 (en) * | 2014-04-25 | 2020-05-19 | Toppan Printing Co., Ltd. | Gas barrier film and gas barrier laminate |
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JPH08267641A (ja) * | 1995-03-29 | 1996-10-15 | Toppan Printing Co Ltd | ガスバリア性を有する透明積層体 |
JPH1110726A (ja) * | 1997-06-27 | 1999-01-19 | Toray Ind Inc | 蒸着用ポリエステルフィルム |
JP2001151264A (ja) * | 1999-11-26 | 2001-06-05 | Toppan Printing Co Ltd | オーバーラップフィルム |
JP2002080705A (ja) * | 2000-09-11 | 2002-03-19 | Unitika Ltd | 接着性に優れた易引裂性ポリエステルフィルム、及びそれを用いた包装材料、包装袋 |
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2003
- 2003-08-28 WO PCT/JP2003/010893 patent/WO2004020309A1/ja active Application Filing
- 2003-08-28 AU AU2003261779A patent/AU2003261779A1/en not_active Abandoned
- 2003-08-28 JP JP2004532743A patent/JPWO2004020309A1/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH08267641A (ja) * | 1995-03-29 | 1996-10-15 | Toppan Printing Co Ltd | ガスバリア性を有する透明積層体 |
JPH1110726A (ja) * | 1997-06-27 | 1999-01-19 | Toray Ind Inc | 蒸着用ポリエステルフィルム |
JP2001151264A (ja) * | 1999-11-26 | 2001-06-05 | Toppan Printing Co Ltd | オーバーラップフィルム |
JP2002080705A (ja) * | 2000-09-11 | 2002-03-19 | Unitika Ltd | 接着性に優れた易引裂性ポリエステルフィルム、及びそれを用いた包装材料、包装袋 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006150617A (ja) * | 2004-11-25 | 2006-06-15 | Unitika Ltd | ポリエステルフィルム積層体、およびこれを用いてなるガスバリア性易開封包装袋 |
JP2006175728A (ja) * | 2004-12-22 | 2006-07-06 | Unitika Ltd | 分包袋用積層フィルムおよびそれからなる分包袋 |
JP2007230123A (ja) * | 2006-03-02 | 2007-09-13 | Toppan Printing Co Ltd | 強密着ガスバリア性積層フィルムおよびその製造方法 |
JP2008105283A (ja) * | 2006-10-26 | 2008-05-08 | Dainippon Printing Co Ltd | 直線引き裂き性ガスバリア性積層フィルム |
JP2008114444A (ja) * | 2006-11-02 | 2008-05-22 | Toppan Printing Co Ltd | 透明複層フィルムの製造方法及びその方法で製造したガスバリア性透明複層フィルム並びに封止フィルム |
GB2452086A (en) * | 2007-08-24 | 2009-02-25 | Sun Chemical Ltd | Gas barrier materials containing PVA and/or EVOH with clay |
JP2010536611A (ja) * | 2007-08-24 | 2010-12-02 | サン・ケミカル・リミテツド | 改良された結合強度を有する気体バリヤーコーティング |
CN103523345A (zh) * | 2013-10-20 | 2014-01-22 | 江苏申凯包装高新技术股份有限公司 | 可发热碳晶片三边封包装袋 |
US10654631B2 (en) * | 2014-04-25 | 2020-05-19 | Toppan Printing Co., Ltd. | Gas barrier film and gas barrier laminate |
JP2016117159A (ja) * | 2014-12-18 | 2016-06-30 | 大日本印刷株式会社 | シーラントフィルム |
Also Published As
Publication number | Publication date |
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JPWO2004020309A1 (ja) | 2005-12-15 |
AU2003261779A1 (en) | 2004-03-19 |
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