WO2007036980A1 - Gas barrier laminated film - Google Patents

Gas barrier laminated film Download PDF

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Publication number
WO2007036980A1
WO2007036980A1 PCT/JP2005/017706 JP2005017706W WO2007036980A1 WO 2007036980 A1 WO2007036980 A1 WO 2007036980A1 JP 2005017706 W JP2005017706 W JP 2005017706W WO 2007036980 A1 WO2007036980 A1 WO 2007036980A1
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WO
WIPO (PCT)
Prior art keywords
gas
gas barrier
film
laminated film
coating layer
Prior art date
Application number
PCT/JP2005/017706
Other languages
French (fr)
Japanese (ja)
Inventor
Hiroshi Suzuki
Ryukichi Matsuo
Noboru Sasaki
Original Assignee
Toppan Printing Co., Ltd.
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Filing date
Publication date
Application filed by Toppan Printing Co., Ltd. filed Critical Toppan Printing Co., Ltd.
Priority to JP2007537481A priority Critical patent/JPWO2007036980A1/en
Priority to CN2005800405986A priority patent/CN101065240B/en
Priority to PCT/JP2005/017706 priority patent/WO2007036980A1/en
Publication of WO2007036980A1 publication Critical patent/WO2007036980A1/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/40Oxides
    • C23C16/401Oxides containing silicon
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/042Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C08J7/0423Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/043Improving the adhesiveness of the coatings per se, e.g. forming primers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/048Forming gas barrier coatings
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02Polyesters derived from dicarboxylic acids and dihydroxy compounds

Definitions

  • the present invention relates to a gas noreia laminated film used in the packaging field of foods, pharmaceuticals and the like.
  • packaging materials used for packaging foods, pharmaceuticals, etc. have been used to suppress the alteration of the contents and to maintain the efficacy of oxygen, water vapor, and other gases that alter the contents of the packaging material. It is necessary to prevent the influence of the gas, and it is required to have gas noria properties that block the permeation of these gases.
  • polybulal alcohol PVA
  • ethylenebulualcohol copolymer EVOH
  • PVDC polysalt vinylidene resin
  • a gas-nolia laminated film obtained by laminating or coating a polymer resin composition is generally used as a packaging film.
  • Metal vapor deposition films obtained by depositing metal or metal compounds such as aluminum (A1) on polymer resin compositions, and recently, silicon oxide (SiO 2) thin films such as silicon monoxide (SiO), ⁇ Magnesium (MgO) thin film with high transparency
  • Vapor-deposited films deposited on substrates that also have molecular material strength have been developed. These have superior gas noreia properties than gas noble materials made from a high molecular weight resin composition alone, and are less susceptible to deterioration under high humidity. Has begun to be used.
  • gas- noria laminated films using the above-described PVA and EVOH polymer resin compositions have a large temperature dependency and humidity dependency. Deterioration of the subbarrier property is observed, in particular, the water vapor nore property is lowered, and depending on the packaging application, the gas nore property may be remarkably lowered by boiling or retort treatment.
  • a gas noreia laminated film using a PVDC-based polymer resin composition has a low humidity dependency but a high gas noreia material having an oxygen noreer property of lcm 3 / m 2 .day 'atm or less. It is difficult to realize (high gas nolia material).
  • PVDC-based polymer resin compositions contain a large amount of chlorine, which causes problems in waste disposal such as incineration and recycling.
  • the above-mentioned metal vapor-deposited film on which a metal or a metal compound is vapor-deposited, a silicon oxide thin film such as silicon monoxide (Si 2 O), or a vapor-deposited film on which a magnesium oxide (MgO) thin film is vapor-deposited are used as a gas nore layer.
  • the thin film of inorganic compound is inflexible, weak against stagnation and bending, and has poor adhesion to the substrate, so it needs to be handled with care, especially after packaging materials such as printing, laminating and bag making. If a crack is generated during processing and the gas noria property is significantly lowered, there is a problem.
  • gas noria material has a certain degree of improvement in gas noria properties compared to the case of a single substrate, it cannot be said that the gas noria properties are still sufficient. Disclosure of the invention
  • the present invention is a gas-nore laminate film that is excellent in gas-nore property, has excellent flexibility, and can suppress degradation of gas-no-reality even when the film is stretched.
  • the purpose is to provide a program.
  • a polymer film substrate, a gas barrier inorganic vapor deposition layer formed on one surface of the polymer film substrate, and the gas barrier inorganic vapor deposition layer are formed.
  • the oxygen permeability when the laminate film is stretched 5% is not more than 1.5 times the oxygen permeability before stretch.
  • a gas-noria laminated film characterized by having noria properties.
  • the gas-nolia laminated film according to one embodiment of the present invention has a water vapor permeability such that the water vapor permeability when the laminated film is stretched by 2% is not more than 1.5 times the water vapor permeability before stretching. Has barrier properties.
  • polyethylene terephthalate film As the polymer film substrate, a polyethylene terephthalate film can be used.
  • the gas barrier coating layer a layer mainly composed of an aqueous polymer having a hydroxyl group can be used.
  • the water-based polymer polybulal alcohol, ethylenebulal alcohol copolymer, and those containing at least one selected from the group strength of cellulose strength can be used.
  • a layer mainly composed of a composite material composed of a metal alkoxide and Z or a hydrolyzate thereof and an aqueous polymer having a hydroxyl group can be used.
  • a metal alkoxide a silicon alkoxide can be used.
  • the gas noriotic coating layer may contain a silane coupling agent.
  • FIG. 1 is a cross-sectional view showing a configuration of a gas barrier laminate film according to an embodiment of the present invention.
  • FIG. 2 is a graph showing the relationship between the degree of elongation and the oxygen permeability of the gas barrier laminate films of Example 1 and Comparative Example 1.
  • FIG. 3 is a graph showing the relationship between the degree of elongation and the water vapor transmission rate of the gas barrier laminate films of Example 1 and Comparative Example 1.
  • FIG. 1 is a schematic view illustrating the configuration of a gas noreia laminated film according to an embodiment of the present invention.
  • a gas barrier laminate film 1 is formed by sequentially laminating a gas norelic inorganic vapor deposition layer 3 as a first layer and a gas nore coat layer 4 as a second layer on a substrate 2. Has been.
  • the substrate 2 is in the form of a sheet or a film, and is a polyolefin such as polyethylene or polypropylene, a polyester such as polyethylene terephthalate, polybutylene terephthalate or polyethylene naphthalate, a polyamide such as nylon 6 or nylon 66, a poly What is normally used as a packaging material, such as butyl chloride, polyimide, or a copolymer of these polymers, can be appropriately selected depending on the application.
  • a polyolefin such as polyethylene or polypropylene
  • a polyester such as polyethylene terephthalate, polybutylene terephthalate or polyethylene naphthalate
  • a polyamide such as nylon 6 or nylon 66
  • a poly What is normally used as a packaging material such as butyl chloride, polyimide, or a copolymer of these polymers, can be appropriately selected depending on the application.
  • the substrate 2 for example, known additives such as an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, and a colorant are appropriately added as necessary. I can do it. Further, the surface of the substrate 2 can be subjected to surface modification such as corona treatment or anchor coating treatment to improve the adhesion of the coating.
  • known additives such as an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, and a colorant are appropriately added as necessary. I can do it.
  • the surface of the substrate 2 can be subjected to surface modification such as corona treatment or anchor coating treatment to improve the adhesion of the coating.
  • the first gas noble inorganic deposition layer 3 formed on the substrate 2 is made of an oxide, nitride, or fluoride of silicon, aluminum, titanium, zirconium, tin, magnesium, or the like. These are formed by a vacuum process such as a vacuum deposition method, a sputtering method, or a plasma vapor deposition method (CVD method).
  • a vacuum process such as a vacuum deposition method, a sputtering method, or a plasma vapor deposition method (CVD method).
  • acid-aluminum is colorless and transparent, has excellent characteristics such as boil and retort resistance, and can be used in a wide range of applications.
  • the thickness of the gas barrier inorganic vapor-deposited layer 3 varies depending on the application and the thickness of the second layer, but it is desirable that the force of several nm is in the range of 500 nm. If the thickness is less than 5 nm, there is a problem in the continuity of the thin film, and if it exceeds 300 nm, cracks occur and the flexibility decreases immediately, so 5 ⁇ ! ⁇ 30 Onm.
  • the second gas noble coating layer 4 formed on the gas barrier inorganic vapor deposition layer 3 is formed by using a coating agent mainly composed of an aqueous solution containing an aqueous polymer or a water Z alcohol mixed solution.
  • the aqueous polymer used as a coating agent for forming the gas nore coating layer 4 is a polymer having a hydroxyl group in the molecule, and is not necessarily limited to a water-soluble polymer. For example, those having an affinity for water, such as Emulsion.
  • aqueous polymer examples include polybulal alcohol, polybulurpyrrolidone, denpene, methylcellulose, carboxymethylcellulose, sodium alginate, an ethylenebulalcohol copolymer, acrylic resin such as polyacrylic acid and polymethacrylic acid, These acrylic resin resins can be mentioned, and particularly, when a polyvinyl alcohol (hereinafter referred to as PVA) is used as a coating agent, the gas nooricity is most excellent.
  • PVA polyvinyl alcohol
  • the PVA here is generally obtained by saponifying polyvinyl acetate, and several tens of percent of acetate groups remain.
  • V a partly partially saponified PVA.
  • V Completely saponified, including up to PVA, not particularly limited! /.
  • the metal alkoxide includes tetraethoxysilane [Si (OCH)], triisopropoxyaluminum.
  • M (OR) (wherein M represents a metal such as Si, Ti, Ai or Zr, and R represents an n 3 2 5 alkyl group such as CH or CH)
  • tetraethoxysilane and triisopropoxyaluminum are preferable because they are relatively stable in an aqueous solvent after hydrolysis.
  • the gas barrier coating layer 4 contains a composite material of an aqueous polymer and a metal alkoxide or a hydrolyzate thereof.
  • the water resistance of the gas barrier coating layer 4 can be improved by using a metal alkoxide.
  • a silane coupling agent can be added to the coating agent. Thereby, the heat resistance of the formed gas barrier coating layer 4 is increased, and even when the gas barrier laminated film is used for packaging of a boiled product or a retort product, it is possible to suppress a decrease in the barrier property.
  • the coating agent has a range that does not impair the barrier property of the gas barrier coating layer 4, and is usually a filler, a lubricant that imparts slipperiness to the film, a colorant, a leveling agent, a purple color.
  • Known additives such as external line absorbers, antioxidants, dispersants, stabilizers, viscosity modifiers, and colorants can be added.
  • an inorganic layered compound such as montmorillonite or smectite can be added to the coating agent in order to give the gas nore coating layer 4 itself nore nature.
  • the film thickness varies depending on the type of coating agent.
  • the thickness after drying may be in the range of about 0.01 to LOO / z m. If it is 50 / z m or more, cracks are likely to occur in the film, so 0.01 to 50 m is desirable.
  • reaction layer is formed between the gas noble inorganic vapor deposition layer 3 and the coating formed by application of the coating agent, or a pinhole in which this coating is formed in the gas barrier inorganic vapor deposition layer 3.
  • a dense structure is formed by filling and reinforcing defects such as cracks and grain boundaries, or micropores, which serve as a protective layer for improving the gas barrier property and for the gas barrier inorganic vapor deposition layer.
  • the gas nooriety can be improved by the following mechanism. That is, the inorganic component composed of metal alkoxide undergoes hydrolysis and polycondensation reaction in solution to form a chain or three-dimensional toothpick polymer, and the polymerization proceeds further by evaporation of the solvent upon drying and heating. It is considered to form a complex at the molecular level with aqueous polymers. Therefore, silica sol (silica silicate (water glass) with fine particles such as silica (SiO 2) with a specific particle size can be obtained.
  • silica sol sica silicate (water glass) with fine particles such as silica (SiO 2) with a specific particle size
  • thermoplastic resin layer and a print layer that can be heat-sealed as necessary are provided on the gas nore coating layer 4 or the substrate 2.
  • processing such as printing and laminating on a packaging material is performed by unwinding the film on a machine, so that tensile stress is applied, and cracks are easily generated in the gas barrier vapor deposition layer.
  • the gas-nootropic laminated film according to one embodiment of the present invention described above is Since the decrease in barrier properties when stretched is small, the barrier properties that were initially retained are almost maintained even when printing on films or processing such as pasting with other films, resulting in high barrier properties. Certain packaging materials can be provided.
  • the gas barrier vapor deposition layer 3 with the inorganic compound strength is used as the first layer on the base material 2 with the polymer resin composition strength, and the aqueous polymer (or the composite of the aqueous polymer and the metal alkoxide).
  • the gas noble laminate film according to the present embodiment obtained by laminating the gas nore coating layer 4 containing the union) as the second layer has high gas nooriness and is flexible, laminate strength, and water resistance. Excellent in heat resistance, moisture resistance, and boil-retort resistance, and even when laminated with other resins, its strength is sufficient for practical use.
  • the oxygen permeability when the laminated film is stretched by 5% is 1.5 times or less of the oxygen permeability before stretching, it can be used as a packaging material in post-processing such as laminating and bag making. It has an excellent effect that it does not impair the gas properties.
  • Aluminum oxide was deposited on the top surface of a 12 m-thick polyethylene terephthalate substrate to a thickness of 15 nm. Further, tetraethoxysilane [Si (OC H):
  • TEOS TEOS
  • a coating agent containing poly bull alcohol
  • Aluminum oxide was deposited on the upper surface of a 12 m-thick polyethylene terephthalate substrate to a thickness of 15 nm to obtain a gas nore laminate film.
  • Example 1 and Comparative Example 1 were stretched in the longitudinal direction, and the gas barrier properties after stretching were determined and compared. That is, the gas nootropic laminated film was stored under constant temperature and humidity of 40 ° C.-90% RH for 4 weeks, and the gas barrier properties before and after that were evaluated by measuring oxygen permeability and water vapor permeability.
  • Oxygen barrier properties at 25 ° C—100% RH atmosphere Measured using a permeability measurement device (MOCON OXTRAN 10Z40A manufactured by Modern Control), and measured the water vapor barrier property using a water vapor permeability measurement device (PERMATRAN W6 manufactured by Modern Control) in an atmosphere of 40 ° C-90RH. .
  • the results are shown in Table 1 and Table 2 below.
  • Table 1 shows the oxygen barrier properties after elongation
  • Table 2 shows the water vapor permeability barrier properties after elongation.
  • 2 and 3 plot Table 1 and Table 2 with the degree of elongation on the horizontal axis and the degree of transmission on the vertical axis.
  • the laminated film according to Example 1 has almost no increase in oxygen permeability even at 5% elongation, whereas the laminated film according to Comparative Example 1 has 5 It can be seen that the oxygen permeability rapidly increased 20 times and the oxygen norality decreased at the elongation of%.
  • the laminated film according to Example 1 hardly increased the water vapor permeability even at an elongation of 2%, whereas the laminated film according to Comparative Example 1 At 2% elongation, the water vapor permeability increases abruptly 10 times, indicating that the water vapor barrier properties are reduced.
  • the gas barrier laminate film of the present invention maintains excellent gas permeability even after stretching due to the formation of a gas nore coating layer on the gas noble vapor deposition layer, so printing, laminating, It can be applied as a packaging material for foods, pharmaceuticals, etc., whose gas barrier properties do not deteriorate even when processing bags, etc., and its range of use is wide.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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Abstract

A gas barrier laminated film which has a polymer film substrate, a gas barrier vapor deposition layer of an inorganic compound formed on one surface of the polymer film substrate, and a gas barrier coating layer formed on the gas barrier vapor deposition layer, characterized in that the film has such an oxygen barrier property that an oxygen permeability of the film after stretched by 5 % is 1.5 times or less as large as that before the stretching.

Description

明 細 書  Specification
ガスバリア性積層フィルム  Gas barrier laminated film
技術分野  Technical field
[0001] 本発明は、食品、医薬品等の包装分野に用いられるガスノリア性積層フィルムに関 する。  [0001] The present invention relates to a gas noreia laminated film used in the packaging field of foods, pharmaceuticals and the like.
背景技術  Background art
[0002] 近年、食品、医薬品等の包装に用いられる包装材料は、内容物の変質を抑制し、 効能を維持するために、包装材料を透過する酸素、水蒸気、その他内容物を変質さ せる気体による影響を防止する必要があり、これら気体 (ガス)の透過を遮断するガス ノリア性を備えることが求められている。  [0002] In recent years, packaging materials used for packaging foods, pharmaceuticals, etc. have been used to suppress the alteration of the contents and to maintain the efficacy of oxygen, water vapor, and other gases that alter the contents of the packaging material. It is necessary to prevent the influence of the gas, and it is required to have gas noria properties that block the permeation of these gases.
[0003] 例えば、食品においては、蛋白質や油脂等の酸化、変質を抑制し、さらに味、鮮度 を保持するために、また無菌状態での取扱いが必要とされる医薬品においては、有 効成分の変質を抑制し、効能を維持するために、それらの包装材料にガスバリア性 が要求されている。  [0003] For example, in the case of pharmaceutical products that inhibit the oxidation and alteration of proteins and oils and fats, and maintain the taste and freshness of foods, and in pharmaceutical products that require handling in aseptic conditions, In order to suppress deterioration and maintain efficacy, these packaging materials are required to have gas barrier properties.
[0004] そのため、従来から、ポリビュルアルコール(PVA)、エチレンビュルアルコール共 重合体 (EVOH)、或 、はポリ塩ィ匕ビユリデン榭脂(PVDC)等の,一般にガスノリア 性が比較的高いとされる高分子榭脂組成物をラミネート又はコーティングしてなるガ スノリア性積層フィルムが包装フィルムとして一般的に使用されてきた。また、単独で は、高 、ガスノリア性を有して!/、な!/、高分子榭脂組成物にアルミニウム (A1)などの金 属又は金属化合物を蒸着した金属蒸着フィルムや、最近では一酸化珪素 (SiO)な どの珪素酸ィ匕物(SiO )薄膜、酸ィ匕マグネシウム (MgO)薄膜を透明性を有する高  [0004] For this reason, it has been conventionally considered that polybulal alcohol (PVA), ethylenebulualcohol copolymer (EVOH), or polysalt vinylidene resin (PVDC) is generally relatively high in gas noliativity. A gas-nolia laminated film obtained by laminating or coating a polymer resin composition is generally used as a packaging film. In addition, alone, it has high gas noria! / Wow! /, Metal vapor deposition films obtained by depositing metal or metal compounds such as aluminum (A1) on polymer resin compositions, and recently, silicon oxide (SiO 2) thin films such as silicon monoxide (SiO),匕 Magnesium (MgO) thin film with high transparency
X  X
分子材料力もなる基材上に蒸着した蒸着フィルムが開発されている。これらは、高分 子榭脂組成物単独からなるガスノ リア材より優れたガスノ リア性を有しており、かつ高 湿度下での劣化も少な 、ため、これらの包装材料力 なる包装フィルムが一般的に 使用され始めている。  Vapor-deposited films deposited on substrates that also have molecular material strength have been developed. These have superior gas noreia properties than gas noble materials made from a high molecular weight resin composition alone, and are less susceptible to deterioration under high humidity. Has begun to be used.
[0005] ところが、上述の PVA、 EVOH系の高分子榭脂組成物を用いたガスノリア性積層 フィルムは、温度依存性及び湿度依存性が大きいため、高温又は高湿下においてガ スバリア性の低下が見られ、特に水蒸気ノリア性が低下し、包装の用途によっては煮 沸処理やレトルト処理を行うとガスノリア性が著しく低下することがある。 [0005] However, gas- noria laminated films using the above-described PVA and EVOH polymer resin compositions have a large temperature dependency and humidity dependency. Deterioration of the subbarrier property is observed, in particular, the water vapor nore property is lowered, and depending on the packaging application, the gas nore property may be remarkably lowered by boiling or retort treatment.
[0006] また、 PVDC系の高分子榭脂組成物を用いたガスノリア性積層フィルムは、湿度依 存性は小さいが、 lcm3 /m2 .day 'atm以下の酸素ノリア性を有する高ガスノリア材 (ハイガスノリア材)を実現することは困難である。また、 PVDC系の高分子榭脂組成 物は塩素を多量に含むため、焼却処理やリサイクリングなど廃棄物処理の面で問題 がある。 [0006] In addition, a gas noreia laminated film using a PVDC-based polymer resin composition has a low humidity dependency but a high gas noreia material having an oxygen noreer property of lcm 3 / m 2 .day 'atm or less. It is difficult to realize (high gas nolia material). In addition, PVDC-based polymer resin compositions contain a large amount of chlorine, which causes problems in waste disposal such as incineration and recycling.
[0007] さらに上述の金属又は金属化合物を蒸着した金属蒸着フィルムや一酸化珪素 (Si O)などの珪素酸ィ匕物薄膜、酸化マグネシウム (MgO)薄膜を蒸着した蒸着フィルム は、ガスノリア層として用いられる無機化合物の薄膜が可撓性に欠けており、揉みや 折り曲げに弱ぐまた基材との密着性が悪いため、取り扱いに注意を要し、とくに印刷 、ラミネート、製袋など包装材料の後加工の際にクラックを発生し、ガスノリア性が著 しく低下すると 、う問題がある。  [0007] Further, the above-mentioned metal vapor-deposited film on which a metal or a metal compound is vapor-deposited, a silicon oxide thin film such as silicon monoxide (Si 2 O), or a vapor-deposited film on which a magnesium oxide (MgO) thin film is vapor-deposited are used as a gas nore layer. The thin film of inorganic compound is inflexible, weak against stagnation and bending, and has poor adhesion to the substrate, so it needs to be handled with care, especially after packaging materials such as printing, laminating and bag making. If a crack is generated during processing and the gas noria property is significantly lowered, there is a problem.
[0008] また、形成方法として真空蒸着法、スパッタリング法、プラズマ化学気相成長法など の真空プロセスを用いるため、装置が高価であり、また形成工程において局部的に 高温となり、基材に損傷を生じたり、低分子量部或いは可塑剤などの添加剤部など の分解、脱ガスなどを起因として無機薄膜中に欠陥、ピンホール等を発生することが あり、高いガスノリア性を達成できないこと、またコスト的に高価となるという問題を有 している。  [0008] In addition, since a vacuum process such as a vacuum deposition method, a sputtering method, or a plasma chemical vapor deposition method is used as a forming method, the apparatus is expensive, and the substrate is locally heated in the forming process, causing damage to the substrate. May cause defects, pinholes, etc. in the inorganic thin film due to decomposition, degassing, etc. of low molecular weight parts or additive parts such as plasticizers. It has the problem of becoming expensive.
[0009] 以上のような問題に対し、特開昭 62— 295931号公報に記載されるように、基材に 金属アルコキシドの被膜を形成してなるガスノリア材が提案されて 、る。このガスバリ ァ材は、ある程度の可撓性を有するとともに、液相コーティング法による製造ができる ため、コスト的にも安価とすることができる。  [0009] To solve the above problems, as described in Japanese Patent Application Laid-Open No. 62-295931, a gas nolia material in which a metal alkoxide film is formed on a base material has been proposed. Since this gas barrier material has a certain degree of flexibility and can be manufactured by a liquid phase coating method, it can also be reduced in cost.
[0010] し力しながら、上記ガスノリア材は、基材単体の場合に比べて、ある程度ガスノリア 性が向上するものの、未だ充分なガスノリア性を有するとは言えないものであった。 発明の開示 [0010] However, although the gas noria material has a certain degree of improvement in gas noria properties compared to the case of a single substrate, it cannot be said that the gas noria properties are still sufficient. Disclosure of the invention
[0011] そこで、本発明は、ガスノリア性に優れているとともに、可撓性にも優れ、フィルムが 伸長した際にもガスノ リア性の劣化を低く抑えることの可能なガスノ リア性積層フィル ムを提供することを目的とする。 [0011] Therefore, the present invention is a gas-nore laminate film that is excellent in gas-nore property, has excellent flexibility, and can suppress degradation of gas-no-reality even when the film is stretched. The purpose is to provide a program.
[0012] 本発明の一態様によると、高分子フィルム基材と、この高分子フィルム基材の一方 の面に形成されたガスバリア性無機蒸着層と、このガスバリア性無機蒸着層上に形 成されたガスノリア性被覆層とを具備するガスノリア性積層フィルムにお 、て、積層 フィルムを 5%伸長した際の酸素透過度が、伸長する前の酸素透過度の 1. 5倍以下 であるような酸素ノリア性を有することを特徴とするガスノリア性積層フィルムが提供 される。  [0012] According to one aspect of the present invention, a polymer film substrate, a gas barrier inorganic vapor deposition layer formed on one surface of the polymer film substrate, and the gas barrier inorganic vapor deposition layer are formed. In a gas nore laminate film having a gas nore coat layer, the oxygen permeability when the laminate film is stretched 5% is not more than 1.5 times the oxygen permeability before stretch. There is provided a gas-noria laminated film characterized by having noria properties.
[0013] 本発明の一態様に係るガスノリア性積層フィルムは、積層フィルムを 2%伸長した 際の水蒸気透過度が、伸長する前の水蒸気透過度の 1. 5倍以下であるような水蒸 気バリア性を有する。  [0013] The gas-nolia laminated film according to one embodiment of the present invention has a water vapor permeability such that the water vapor permeability when the laminated film is stretched by 2% is not more than 1.5 times the water vapor permeability before stretching. Has barrier properties.
[0014] 高分子フィルム基材としては、ポリエチレンテレフタレートフィルムを用いることがで きる。  [0014] As the polymer film substrate, a polyethylene terephthalate film can be used.
[0015] ガスバリア性被覆層としては、水酸基を有する水性高分子を主成分とするものを用 いることができる。水性高分子としては、ポリビュルアルコール、エチレンビュルアルコ ール共重合体、及びセルロース力 なる群力 選ばれた少なくとも 1種を含むものを 用!/、ることができる。  [0015] As the gas barrier coating layer, a layer mainly composed of an aqueous polymer having a hydroxyl group can be used. As the water-based polymer, polybulal alcohol, ethylenebulal alcohol copolymer, and those containing at least one selected from the group strength of cellulose strength can be used.
[0016] また、ガスノリア性被覆層としては、金属アルコキシド及び Z又はその加水分解物 と、水酸基を有する水性高分子とからなる複合物質を主成分とするものを用いること ができる。金属アルコキシドとしては、ケィ素アルコキシドを用いることができる。  [0016] Further, as the gas nore coating layer, a layer mainly composed of a composite material composed of a metal alkoxide and Z or a hydrolyzate thereof and an aqueous polymer having a hydroxyl group can be used. As the metal alkoxide, a silicon alkoxide can be used.
[0017] 更に、ガスノリア性被覆層は、シランカップリング剤を含むことができる。  [0017] Further, the gas noriotic coating layer may contain a silane coupling agent.
図面の簡単な説明  Brief Description of Drawings
[0018] [図 1]図 1は、本発明の一実施形態に係るガスバリア性積層フィルムの構成を示す断 面図である。  FIG. 1 is a cross-sectional view showing a configuration of a gas barrier laminate film according to an embodiment of the present invention.
[図 2]図 2は、実施例 1と比較例 1のガスバリア性積層フィルムの伸長度と酸素透過度 との関係を示すグラフである。  FIG. 2 is a graph showing the relationship between the degree of elongation and the oxygen permeability of the gas barrier laminate films of Example 1 and Comparative Example 1.
[図 3]図 3は、実施例 1と比較例 1のガスバリア性積層フィルムの伸長度と水蒸気透過 度との関係を示すグラフである。  FIG. 3 is a graph showing the relationship between the degree of elongation and the water vapor transmission rate of the gas barrier laminate films of Example 1 and Comparative Example 1.
発明を実施するための最良の形態 [0019] 以下、発明を実施するための最良の形態について説明する。図 1は、本発明の一 実施形態に係るガスノリア性積層フィルムの構成を説明する概略図である。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the invention will be described. FIG. 1 is a schematic view illustrating the configuration of a gas noreia laminated film according to an embodiment of the present invention.
[0020] 図 1において、ガスバリア性積層フィルム 1は、基材 2上に、第 1層であるガスノリア 性無機蒸着層 3及び第 2層であるガスノリア性被覆層 4を順次積層することにより構 成されている。  In FIG. 1, a gas barrier laminate film 1 is formed by sequentially laminating a gas norelic inorganic vapor deposition layer 3 as a first layer and a gas nore coat layer 4 as a second layer on a substrate 2. Has been.
[0021] 基材 2は、シート状またはフィルム状のものであって、ポリエチレン、ポリプロピレン等 のポリオレフイン、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレ ンナフタレート等のポリエステル、ナイロン 6、ナイロン 66等のポリアミド、ポリ塩化 ビュル、ポリイミドなど、或いはこれら高分子の共重合体など、通常包装材料として用 Vヽられるものを、用途に応じて適宜選択することができる。  [0021] The substrate 2 is in the form of a sheet or a film, and is a polyolefin such as polyethylene or polypropylene, a polyester such as polyethylene terephthalate, polybutylene terephthalate or polyethylene naphthalate, a polyamide such as nylon 6 or nylon 66, a poly What is normally used as a packaging material, such as butyl chloride, polyimide, or a copolymer of these polymers, can be appropriately selected depending on the application.
[0022] この基材 2を構成する高分子榭脂材料には、例えば帯電防止剤、紫外線吸収剤、 可塑剤、滑剤、着色剤などの公知の添加剤を、必要に応じて適宜添加することがで きる。また、基材 2の表面に、コロナ処理、アンカーコート処理等の表面改質を施し、 被膜の密着性を向上させることも可能である。  [0022] To the polymer resin material constituting the substrate 2, for example, known additives such as an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, and a colorant are appropriately added as necessary. I can do it. Further, the surface of the substrate 2 can be subjected to surface modification such as corona treatment or anchor coating treatment to improve the adhesion of the coating.
[0023] 基材 2上に形成される、第 1層であるガスノリア性無機蒸着層 3は、珪素、アルミ- ゥム、チタン、ジルコニウム、錫、マグネシウムなどの酸化物、窒化物、弗化物の単体 、或いはそれらの複合物力 なり、真空蒸着法、スパッタリング法、プラズマ気相成長 法 (CVD法)などの真空プロセスにより形成される。とくに酸ィ匕アルミニウムは、無色 透明であり、ボイル'レトルト耐性等の特性にも優れており、広範囲の用途に用いるこ とがでさる。  [0023] The first gas noble inorganic deposition layer 3 formed on the substrate 2 is made of an oxide, nitride, or fluoride of silicon, aluminum, titanium, zirconium, tin, magnesium, or the like. These are formed by a vacuum process such as a vacuum deposition method, a sputtering method, or a plasma vapor deposition method (CVD method). In particular, acid-aluminum is colorless and transparent, has excellent characteristics such as boil and retort resistance, and can be used in a wide range of applications.
[0024] ガスバリア性無機蒸着層 3の膜厚は、用途や第 2層の膜厚によって異なるが、数 nm 力も 500nmの範囲が望ましい。 5nm以下では薄膜の連続性に問題があり、また 300 nmを越えるとクラックが発生しやすぐ可撓性が低下するため、好ましくは 5ηπ!〜 30 Onmである。  [0024] The thickness of the gas barrier inorganic vapor-deposited layer 3 varies depending on the application and the thickness of the second layer, but it is desirable that the force of several nm is in the range of 500 nm. If the thickness is less than 5 nm, there is a problem in the continuity of the thin film, and if it exceeds 300 nm, cracks occur and the flexibility decreases immediately, so 5ηπ! ~ 30 Onm.
[0025] ガスバリア性無機蒸着層 3上に形成される、第 2層であるガスノリア性被覆層 4は、 水性高分子を含む水溶液又は水 Zアルコール混合溶液を主剤とするコーティング剤 を用いて形成される。或いは、水性高分子と 1種以上の金属アルコキシド又はその加 水分解物を含む水溶液又は水 Zアルコール混合溶液を主剤とするコーティング剤を 用いて形成される。具体的には、このようなコーティング剤を基材 2上の無機薄膜層 3 表面にコ一ティングし、加熱乾燥することにより形成される。 [0025] The second gas noble coating layer 4 formed on the gas barrier inorganic vapor deposition layer 3 is formed by using a coating agent mainly composed of an aqueous solution containing an aqueous polymer or a water Z alcohol mixed solution. The Alternatively, a coating agent mainly composed of an aqueous solution or water Z alcohol mixed solution containing an aqueous polymer and one or more metal alkoxides or hydrolyzed products thereof. Formed using. Specifically, it is formed by coating such a coating agent on the surface of the inorganic thin film layer 3 on the substrate 2 and drying by heating.
[0026] ガスノ リア性被覆層 4の形成にコーティング剤として用いられる水性高分子は、分 子中に水酸基を有する高分子であり、必ずしも水溶性のものに限られない。例えば、 ェマルジヨンなどの水に親和性を有するものを含む。  [0026] The aqueous polymer used as a coating agent for forming the gas nore coating layer 4 is a polymer having a hydroxyl group in the molecule, and is not necessarily limited to a water-soluble polymer. For example, those having an affinity for water, such as Emulsion.
[0027] 水性高分子としては、例えば、ポリビュルアルコール、ポリビュルピロリドン、デンプ ン、メチルセルロース、カルボキシメチルセルロース、アルギン酸ナトリウム、エチレン ビュルアルコール共重合体、ポリアクリル酸ゃポリメタクリル酸などのアクリル榭脂、 これらのアクリル系榭脂の共重合体などが挙げられる、特に、ポリビニルアルコール( 以下、 PVAとする)をコーティング剤に用いた場合に、ガスノ リア性が最も優れている 。ここでいう PVAは、一般にポリ酢酸ビニルをけん化して得られるもので、酢酸基が 数十%残存して 、る、 V、わゆる部分けん化 PVAから酢酸基が数%し力残存して 、な Vヽ完全けん化 PVAまでを含み、とくに限定されるものではな!/、。  [0027] Examples of the aqueous polymer include polybulal alcohol, polybulurpyrrolidone, denpene, methylcellulose, carboxymethylcellulose, sodium alginate, an ethylenebulalcohol copolymer, acrylic resin such as polyacrylic acid and polymethacrylic acid, These acrylic resin resins can be mentioned, and particularly, when a polyvinyl alcohol (hereinafter referred to as PVA) is used as a coating agent, the gas nooricity is most excellent. The PVA here is generally obtained by saponifying polyvinyl acetate, and several tens of percent of acetate groups remain. V, a partly partially saponified PVA. V ヽ Completely saponified, including up to PVA, not particularly limited! /.
[0028] 金属アルコキシドは、テトラエトキシシラン〔Si (OC H ) 〕、トリイソプロポキシアルミ  [0028] The metal alkoxide includes tetraethoxysilane [Si (OCH)], triisopropoxyaluminum.
2 5 4  2 5 4
-ゥム〔八1 (0 2'—じ H ) 〕などの、下記一般式により表されるものである。  It is represented by the following general formula, such as -um [8 1 (0 2'-ji H)].
3 7 3  3 7 3
[0029] M (OR) (式中、 Mは Si、 Ti、 Ai、 Zr等の金属を示し、 Rは、 CH 、 C H等のァ n 3 2 5 ルキル基を示す)  [0029] M (OR) (wherein M represents a metal such as Si, Ti, Ai or Zr, and R represents an n 3 2 5 alkyl group such as CH or CH)
これらのなかでも、テトラエトキシシラン、トリイソプロポキシアルミニウム力 加水分解 後、水系の溶媒中において比較的安定であるので好ましい。  Of these, tetraethoxysilane and triisopropoxyaluminum are preferable because they are relatively stable in an aqueous solvent after hydrolysis.
[0030] コーティング剤が金属アルコキシド又はその加水分解物を含む場合、ガスバリア性 被覆層 4は、水性高分子と金属アルコキシド又はその加水分解物の複合材料を含む ものとなる。このように、金属アルコキシドを用いることにより、ガスバリア性被覆層 4の 耐水性を向上させることができる。 [0030] When the coating agent contains a metal alkoxide or a hydrolyzate thereof, the gas barrier coating layer 4 contains a composite material of an aqueous polymer and a metal alkoxide or a hydrolyzate thereof. Thus, the water resistance of the gas barrier coating layer 4 can be improved by using a metal alkoxide.
[0031] コーティング剤には、シランカップリング剤を添加することができる。これにより、形成 されたガスバリア性被覆層 4の耐熱性が高まり、ガスバリア性積層フィルムがボイル製 品やレトルト製品の包装に使用されても、バリア性の低下を小さく抑えることができる。  [0031] A silane coupling agent can be added to the coating agent. Thereby, the heat resistance of the formed gas barrier coating layer 4 is increased, and even when the gas barrier laminated film is used for packaging of a boiled product or a retort product, it is possible to suppress a decrease in the barrier property.
[0032] また、コーティング剤には、ガスバリア性被覆層 4のバリア性を損なわな ヽ範囲で、 通常使用される充填剤、フィルムに滑り性を付与する滑剤、着色剤、レべリング剤、紫 外線吸収剤、酸化防止剤、分散剤、安定化剤、粘度調整剤、着色剤など公知の添 加剤をカ卩えることができる。 [0032] In addition, the coating agent has a range that does not impair the barrier property of the gas barrier coating layer 4, and is usually a filler, a lubricant that imparts slipperiness to the film, a colorant, a leveling agent, a purple color. Known additives such as external line absorbers, antioxidants, dispersants, stabilizers, viscosity modifiers, and colorants can be added.
[0033] 更に、コーティング剤には、ガスノ リア性被覆層 4自体にノ リア性をもたせるために 、モンモリロナイト、スメクタイト等の無機層状ィ匕合物を添加することもできる。  [0033] Furthermore, an inorganic layered compound such as montmorillonite or smectite can be added to the coating agent in order to give the gas nore coating layer 4 itself nore nature.
[0034] コーティング剤の塗布方法には、通常用いられる、デイツビング法、ロールコーティ ング法、スクリーン印刷法、スプレー法など従来公知の手段が用いられる。被膜の厚 さはコーティング剤の種類によって異なる力 乾燥後の厚さが約 0. 01〜: LOO /z mの 範囲であればよい。 50 /z m以上では、膜にクラックが生じやすくなるため、 0. 01〜5 0 mとすることが望ましい。  [0034] Conventionally known means such as a dating method, a roll coating method, a screen printing method, and a spray method are used for the coating method. The film thickness varies depending on the type of coating agent. The thickness after drying may be in the range of about 0.01 to LOO / z m. If it is 50 / z m or more, cracks are likely to occur in the film, so 0.01 to 50 m is desirable.
[0035] なお、ガスノ リア性無機蒸着層 3とコーティング剤の塗布により形成された被膜との 間に、何らかの反応層が形成されるか、或いはこの被膜がガスバリア性無機蒸着層 3 に生じるピンホール、クラック、粒界などの欠陥或いは微細孔を充填、補強することで 、緻密構造が形成され、これがガスバリア性の向上とガスバリア性無機蒸着層の保護 層としての役割を果たす。  [0035] It should be noted that some reaction layer is formed between the gas noble inorganic vapor deposition layer 3 and the coating formed by application of the coating agent, or a pinhole in which this coating is formed in the gas barrier inorganic vapor deposition layer 3. In addition, a dense structure is formed by filling and reinforcing defects such as cracks and grain boundaries, or micropores, which serve as a protective layer for improving the gas barrier property and for the gas barrier inorganic vapor deposition layer.
[0036] また、コーティング剤力 金属アルコキシド力 なる無機成分と PVA等の水性高分 子を主剤とするものである場合、次のようなメカニズムで、ガスノ リア性の向上を図る ことができる。すなわち、金属アルコキシドからなる無機成分は溶液中で加水分解、 重縮合反応して、鎖状或いは三次元榭枝状のポリマーを形成し、乾燥加熱にともなう 溶媒の蒸発によってさらに重合が進行する反応性に富む無機成分であり、水性高分 子とは分子レベルの複合体を形成しているものと考えられる。従って、特定の粒子径 からなるシリカ(SiO )などの微粒子ゃ珪酸ソーダ (水ガラス)力も得られるシリカゾル (  [0036] In the case where the main component is an inorganic component having a coating agent strength, a metal alkoxide force, and an aqueous polymer such as PVA, the gas nooriety can be improved by the following mechanism. That is, the inorganic component composed of metal alkoxide undergoes hydrolysis and polycondensation reaction in solution to form a chain or three-dimensional toothpick polymer, and the polymerization proceeds further by evaporation of the solvent upon drying and heating. It is considered to form a complex at the molecular level with aqueous polymers. Therefore, silica sol (silica silicate (water glass) with fine particles such as silica (SiO 2) with a specific particle size can be obtained.
2  2
コロイダルシリカ)などのように単に微粒子を分散したものとは異なる。  It is different from those obtained by simply dispersing fine particles such as colloidal silica.
[0037] 更に、本実施形態に係るガスノ リア性積層フィルム上には、必要に応じてヒートシ一 ル可能な熱可塑性榭脂層、印刷層を、ガスノ リア性被覆層 4上または基材 2上に積 層することができ、また複数の榭脂を接着層を介して積層することも可能である。 [0037] Further, on the gas nore laminate film according to the present embodiment, a thermoplastic resin layer and a print layer that can be heat-sealed as necessary are provided on the gas nore coating layer 4 or the substrate 2. In addition, it is possible to stack a plurality of resins via an adhesive layer.
[0038] 通常、包装材料に印刷や貼り合わせなどの加工は、フィルムを機械上で巻き出しな 力 行うため、引っ張り応力がかかり、ガスバリア性蒸着層にクラック等が発生しやす い。しかし、以上説明した本発明の一実施形態に係るガスノ リア性積層フィルムは、 伸長時のバリア性の低下が小さいため、フィルムに印刷を行ったり、他のフィルムと貼 り合わせる等の加工を行っても、当初保持していたバリア性がほぼ維持され、高いバ リア性のある包装材料を提供することができる。 [0038] Usually, processing such as printing and laminating on a packaging material is performed by unwinding the film on a machine, so that tensile stress is applied, and cracks are easily generated in the gas barrier vapor deposition layer. However, the gas-nootropic laminated film according to one embodiment of the present invention described above is Since the decrease in barrier properties when stretched is small, the barrier properties that were initially retained are almost maintained even when printing on films or processing such as pasting with other films, resulting in high barrier properties. Certain packaging materials can be provided.
[0039] 以上のように、高分子榭脂組成物力 なる基材 2上に、無機化合物力 なるガスバ リア性蒸着層 3を第 1層とし、水性高分子 (又は水性高分子と金属アルコキシドの複 合体)を含むガスノ リア性被覆層 4を第 2層として積層することにより得た本実施形態 に係るガスノ リア性積層フィルムは、高いガスノ リア性を有し、かつ可撓性、ラミネート 強度、耐水性、耐湿性、ボイル'レトルト耐性に優れ、さらに他の樹脂と積層しても、そ の強度は十分実用に耐えるものである。すなわち、高温'高湿度雰囲気下において もガスバリア性を損なうことなぐ食品や医薬品など内容物を劣化させることなく長期 保存を可能とするものである。更に、積層フィルムを 5%伸長した際の酸素透過度が 、伸長する前の酸素透過度の 1. 5倍以下であるので、包装材料として印刷ゃラミネ ート、製袋など後加工においても、ガスノ リア性を損なうことがないといる優れた効果 を奏する。  [0039] As described above, the gas barrier vapor deposition layer 3 with the inorganic compound strength is used as the first layer on the base material 2 with the polymer resin composition strength, and the aqueous polymer (or the composite of the aqueous polymer and the metal alkoxide). The gas noble laminate film according to the present embodiment obtained by laminating the gas nore coating layer 4 containing the union) as the second layer has high gas nooriness and is flexible, laminate strength, and water resistance. Excellent in heat resistance, moisture resistance, and boil-retort resistance, and even when laminated with other resins, its strength is sufficient for practical use. In other words, even under high-temperature and high-humidity atmospheres, long-term storage is possible without deteriorating contents such as foods and pharmaceuticals that do not impair gas barrier properties. Furthermore, since the oxygen permeability when the laminated film is stretched by 5% is 1.5 times or less of the oxygen permeability before stretching, it can be used as a packaging material in post-processing such as laminating and bag making. It has an excellent effect that it does not impair the gas properties.
[0040] 以下、本発明のガスノ リア性積層フィルムの具体的な実施例について説明する。  [0040] Specific examples of the gas noble laminated film of the present invention will be described below.
[0041] 〔実施例 1〕 [Example 1]
厚さ 12 mのポリエチレンテレフタレートからなる基材の上面に酸化アルミニウムを 15nmの厚さに蒸着し、さらにその上に、テトラエトキシシラン〔Si (OC H ) :以下、  Aluminum oxide was deposited on the top surface of a 12 m-thick polyethylene terephthalate substrate to a thickness of 15 nm. Further, tetraethoxysilane [Si (OC H):
2 5 4  2 5 4
TEOSとする〕とポリビュルアルコールを含むコーティング剤をバーコ一ターにより塗 布し、乾燥機で 120°Cで 1分間乾燥させ、膜厚約 1 μ mの被膜を形成し、ガスバリア 性積層フィルムを得た。  TEOS) and a coating agent containing poly (bull alcohol) is applied with a bar coater and dried at 120 ° C for 1 minute in a dryer to form a film with a thickness of about 1 μm. Obtained.
[0042] 〔比較例 1〕  [Comparative Example 1]
厚さ 12 mのポリエチレンテレフタレートからなる基材の上面に酸化アルミニウムを 15nmの厚さに蒸着し、ガスノ リア性積層フィルムを得た。  Aluminum oxide was deposited on the upper surface of a 12 m-thick polyethylene terephthalate substrate to a thickness of 15 nm to obtain a gas nore laminate film.
[0043] 実施例 1及び比較例 1に係るガスバリア性積層フィルムを長手方向に伸長し、伸長 後のガスバリア性を求め、比較した。即ち、ガスノ リア性積層フィルムを 40°C— 90% RHの恒温恒湿下で 4週間保存し、その前後のガスバリア性を酸素透過度及び水蒸 気透過度の測定により評価した。酸素バリア性を 25°C— 100%RH雰囲気下で酸素 透過度測定装置(モダンコントロール社製 MOCON OXTRAN 10Z40A)を用い て測定し、水蒸気バリア性を 40°C— 90RH雰囲気下で水蒸気透過度測定装置 (モ ダンコントロール社製 PERMATRAN W6)を用いて測定した。その結果を下記表 1 及び表 2に示す。 [0043] The gas barrier laminated films according to Example 1 and Comparative Example 1 were stretched in the longitudinal direction, and the gas barrier properties after stretching were determined and compared. That is, the gas nootropic laminated film was stored under constant temperature and humidity of 40 ° C.-90% RH for 4 weeks, and the gas barrier properties before and after that were evaluated by measuring oxygen permeability and water vapor permeability. Oxygen barrier properties at 25 ° C—100% RH atmosphere Measured using a permeability measurement device (MOCON OXTRAN 10Z40A manufactured by Modern Control), and measured the water vapor barrier property using a water vapor permeability measurement device (PERMATRAN W6 manufactured by Modern Control) in an atmosphere of 40 ° C-90RH. . The results are shown in Table 1 and Table 2 below.
なお、表 1は、伸長後の酸素バリア性を、表 2は、伸長後の水蒸気透バリア性をそれ ぞれ示す。また、図 2及び図 3は、表 1及び表 2を、伸長度を横軸に、透過度を縦軸に プロットしたものである。  Table 1 shows the oxygen barrier properties after elongation, and Table 2 shows the water vapor permeability barrier properties after elongation. 2 and 3 plot Table 1 and Table 2 with the degree of elongation on the horizontal axis and the degree of transmission on the vertical axis.
[表 1] 表 1[Table 1] Table 1
Figure imgf000009_0001
Figure imgf000009_0001
[表 2] [Table 2]
表 2 Table 2
Figure imgf000010_0001
Figure imgf000010_0001
[0045] 表 1及及び図 2から、実施例 1に係る積層フィルムは、 5%の伸長度においても殆ど 酸素透過度が増加していないのに対し、比較例 1に係る積層フィルムは、 5%の伸長 度において、酸素透過度が 20倍に急激に増加し、酸素ノ リア性が低下していること がわカゝる。 [0045] From Table 1 and FIG. 2, the laminated film according to Example 1 has almost no increase in oxygen permeability even at 5% elongation, whereas the laminated film according to Comparative Example 1 has 5 It can be seen that the oxygen permeability rapidly increased 20 times and the oxygen norality decreased at the elongation of%.
[0046] また、表 2及及び図 2から、実施例 1に係る積層フィルムは、 2%の伸長度において も殆ど水蒸気透過度が増加していないのに対し、比較例 1に係る積層フィルムは、 2 %の伸長度において、水蒸気透過度が 10倍に急激に増加し、水蒸気バリア性が低 下していることがわ力る。  [0046] Further, from Table 2 and FIG. 2, the laminated film according to Example 1 hardly increased the water vapor permeability even at an elongation of 2%, whereas the laminated film according to Comparative Example 1 At 2% elongation, the water vapor permeability increases abruptly 10 times, indicating that the water vapor barrier properties are reduced.
産業上の利用可能性  Industrial applicability
[0047] 本発明のガスバリア性積層フィルムは、ガスノ リア性蒸着層上へのガスノ リア性被 覆層の形成により、伸長後においても優れたガス透過性を維持しているため、印刷、 ラミネート、製袋など加工の際にもガスバリア性が低下することがなぐ食品、医薬品 等の包装材料として適用することができ、その利用範囲は広い。 [0047] The gas barrier laminate film of the present invention maintains excellent gas permeability even after stretching due to the formation of a gas nore coating layer on the gas noble vapor deposition layer, so printing, laminating, It can be applied as a packaging material for foods, pharmaceuticals, etc., whose gas barrier properties do not deteriorate even when processing bags, etc., and its range of use is wide.

Claims

請求の範囲 The scope of the claims
[1] 高分子フィルム基材と、この高分子フィルム基材の一方の面に形成されたガスバリ ァ性無機蒸着層と、このガスバリア性無機蒸着層上に形成されたガスバリア性被覆 層とを具備するガスノリア性積層フィルムにお 、て、前記積層フィルムを 5%伸長した 際の酸素透過度が、伸長する前の酸素透過度の 1. 5倍以下であるような酸素バリア 性を有することを特徴とするガスノリア性積層フィルム。  [1] A polymer film substrate, a gas barrier inorganic vapor deposition layer formed on one surface of the polymer film substrate, and a gas barrier coating layer formed on the gas barrier inorganic vapor deposition layer The gas-nolia laminated film has an oxygen barrier property such that the oxygen permeability when the laminated film is stretched by 5% is not more than 1.5 times the oxygen permeability before stretching. Gas noria laminated film.
[2] 前記積層フィルムを 2%伸長した際の水蒸気透過度が、伸長する前の水蒸気透過 度の 1. 5倍以下であるような水蒸気バリア性を有することを特徴とする請求項 1に記 載のガスバリア性積層フィルム。 [2] The water vapor barrier property according to claim 1, wherein the water vapor permeability when the laminated film is stretched by 2% is not more than 1.5 times the water vapor permeability before stretching. Gas barrier laminate film.
[3] 前記高分子フィルム基材は、ポリエチレンテレフタレートフィルムであることを特徴と する請求項 1に記載のガスバリア性積層フィルム。 [3] The gas barrier laminate film according to [1], wherein the polymer film substrate is a polyethylene terephthalate film.
[4] 前記ガスバリア性被覆層が、水酸基を有する水性高分子を主成分とすることを特徴 とする請求項 1に記載のガスノリア性積層フィルム。 [4] The gas noreia laminate film according to [1], wherein the gas barrier coating layer is mainly composed of an aqueous polymer having a hydroxyl group.
[5] 前記水性高分子が、ポリビュルアルコール、エチレンビュルアルコール共重合体、 及びセルロース力 なる群力 選ばれた少なくとも 1種を含むことを特徴とする請求項[5] The aqueous polymer contains at least one selected from the group force consisting of polybulal alcohol, ethylenebulalcohol copolymer, and cellulose strength.
4に記載のガスバリア性積層フィルム。 4. The gas barrier laminate film according to 4.
[6] 前記ガスバリア性被覆層が、金属アルコキシド及び Z又はその加水分解物と、水酸 基を有する水性高分子とからなる複合物質を主成分とすることを特徴とする請求項 1 に記載のガスノ リア性積層フィルム。 [6] The gas barrier coating layer according to claim 1, wherein the gas barrier coating layer is mainly composed of a composite material composed of a metal alkoxide and Z or a hydrolyzate thereof, and an aqueous polymer having a hydroxyl group. Gas nore laminated film.
[7] 前記金属アルコキシドがケィ素アルコキシドであることを特徴とする請求項 6に記載 のガスバリア性積層フィルム。 7. The gas barrier laminate film according to claim 6, wherein the metal alkoxide is a silicon alkoxide.
[8] 前記ガスノ リア性被覆層が、シランカップリング剤を更に含むことを特徴とする請求 項 6に記載のガスバリア性積層フィルム。 8. The gas barrier laminate film according to claim 6, wherein the gas noble coating layer further contains a silane coupling agent.
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