JP2007211038A - Plastic film exhibiting oxygen barrier property and packaging bag prepared using plastic film - Google Patents

Plastic film exhibiting oxygen barrier property and packaging bag prepared using plastic film Download PDF

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JP2007211038A
JP2007211038A JP2006029420A JP2006029420A JP2007211038A JP 2007211038 A JP2007211038 A JP 2007211038A JP 2006029420 A JP2006029420 A JP 2006029420A JP 2006029420 A JP2006029420 A JP 2006029420A JP 2007211038 A JP2007211038 A JP 2007211038A
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plastic film
oxygen barrier
barrier property
packaging bag
layer
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Masashi Goto
雅士 後藤
Masayuki Nishina
正行 仁科
Eishin Miyake
英信 三宅
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Toppan Inc
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Toppan Printing Co Ltd
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<P>PROBLEM TO BE SOLVED: To provide a plastic film that is excellent in adhesion to a gas barrier layer, exhibits gas barrier properties and is free from a problem with respect to an incineration treatment, a gas barrier laminated product using the plastic film, and a packaging bag using the laminated product. <P>SOLUTION: The plastic film (10) exhibiting oxygen barrier properties comprises a plastic film (11) as a substrate and an ethylene/vinyl alcohol copolymer-based oxygen barrier coating layer (13) applied thereon via an amine/epoxy-curing type urethane anchor coating layer (12). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、酸素バリア性を有するプラスチックフィルムに関するものであり、特には、EVOH系のバリアコート層を形成させたプラスチックフィルムと該プラスチックフィルムを用いた積層材料と該積層材料を用いて作製した包装袋に関する。   The present invention relates to a plastic film having oxygen barrier properties, and in particular, a plastic film on which an EVOH-based barrier coat layer is formed, a laminated material using the plastic film, and a package produced using the laminated material Regarding bags.

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、特に食品においてはたんぱく質や油脂等の酸化、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、効能を維持させるために、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、これら気体を遮断するガスバリア性を備えることが求められている。   In recent years, packaging materials used for packaging foods, pharmaceuticals, etc. are used to suppress the alteration of the contents, especially the oxidation and alteration of proteins and fats and oils in foods, and to maintain the taste and freshness, and in aseptic conditions. It is necessary to prevent the influence of oxygen, water vapor, and other gases that alter the contents of the packaging material in order to suppress the alteration of the active ingredients and maintain the efficacy in the pharmaceuticals that require the handling of It is required to have a gas barrier property that blocks these gases.

このため、従来よりポリビニルアルコール(以下PVAとする)、エチレンビニルアルコール共重合体(以下EVOHとする)、あるいはポリ塩化ビニリデン樹脂(以下PVDCとする)など一般にガスバリア性が比較的高いといわれる高分子樹脂組成物をラミネートまたはコーティングにより設けたガスバリア積層体が包装フィルムとして一般的に使用されてきた。   For this reason, polymers such as polyvinyl alcohol (hereinafter referred to as PVA), ethylene vinyl alcohol copolymer (hereinafter referred to as EVOH), or polyvinylidene chloride resin (hereinafter referred to as PVDC) that are generally said to have a relatively high gas barrier property. A gas barrier laminate provided with a resin composition by lamination or coating has been generally used as a packaging film.

上述のPVA、EVOH系の高分子樹脂組成物を用いてなるガスバリア性積層体は、温度依存性及び湿度依存性が大きいため、高温または高湿下においてガスバリア性の低下が見られ、特に水蒸気バリア性が低下する。また、包装の用途によってはボイル処理やレトルト処理を行うとガスバリア性が著しく低下することがある。   Since the gas barrier laminate using the above-mentioned PVA and EVOH polymer resin composition has a large temperature dependency and humidity dependency, the gas barrier property is lowered at high temperature or high humidity. Sex is reduced. In addition, depending on the packaging application, the gas barrier property may be significantly lowered when the boil treatment or the retort treatment is performed.

またPVDC系の高分子樹脂組成物を用いてなるガスバリア性積層体は、湿度依存性は小さいが、被膜中に塩素を多量に含むため、焼却処理やリサイクルなど廃棄物処理の面で問題がある。   In addition, the gas barrier laminate using the PVDC polymer resin composition is less dependent on humidity, but has a problem in terms of waste treatment such as incineration and recycling because it contains a large amount of chlorine in the coating. .

本発明は、プラスチックフィルムを用いたガスバリア積層体に関する以上のような問題に鑑みてなされたもので、ガスバリア層との密着性の優れ、ガスバリア性が有り、焼却処理の問題のないプラスチックフィルムと、該プラスチックフィルムを用いたガスバリア性積層体と該積層体を用いた包装袋を提供することを課題とする。   The present invention was made in view of the above-mentioned problems related to the gas barrier laminate using a plastic film, and has excellent adhesion with the gas barrier layer, has a gas barrier property, and has no problem of incineration, and It is an object of the present invention to provide a gas barrier laminate using the plastic film and a packaging bag using the laminate.

本発明の請求項1の発明は、基材となるプラスチックフィルムに、アミン/エポキシ硬化タイプのウレタン系アンカーコート層を介してエチレンビニルアルコール共重合体(EVOH)系酸素バリアコート層が塗布されていることを特徴とする、酸素バリア性を有するプラスチックフィルムである。   According to the first aspect of the present invention, an ethylene / vinyl alcohol copolymer (EVOH) -based oxygen barrier coat layer is applied to a plastic film as a base material via an amine / epoxy-cured urethane-based anchor coat layer. A plastic film having oxygen barrier properties.

このように請求項1記載の発明によれば、基材となるプラスチックフィルムに、アミン/エポキシ硬化タイプのウレタン系アンカーコート層を介してEVOH系酸素バリアコート層が塗布されているので、EVOH系のバリアコーティング剤をプラスチックフィルムに強固に塗布することができる。   Thus, according to the first aspect of the present invention, since the EVOH-based oxygen barrier coat layer is applied to the plastic film as the base material via the amine / epoxy-cured urethane anchor coat layer, the EVOH-based This barrier coating agent can be firmly applied to a plastic film.

また、請求項2の発明は、請求項1記載の酸素バリア性を有するプラスチックフィルムの酸素バリアコート層の上に、接着剤層を介してヒートシール性樹脂層が積層されていることを特徴とする、酸素バリア性を有するプラスチックフィルムを用いた積層材料である。   The invention of claim 2 is characterized in that a heat-sealable resin layer is laminated on the oxygen barrier coat layer of the plastic film having oxygen barrier properties according to claim 1 through an adhesive layer. And a laminated material using a plastic film having oxygen barrier properties.

このように請求項2記載の発明によれば、酸素バリア性を有するプラスチックフィルムの酸素バリアコート層の上に、接着剤層を介してヒートシール性樹脂層が積層されているので、酸素バリア性を有するとともに基材フィルムと密着性の良好な積層材料とすることができる。   Thus, according to the invention described in claim 2, since the heat-sealable resin layer is laminated on the oxygen barrier coat layer of the plastic film having oxygen barrier properties via the adhesive layer, And a laminate material having good adhesion to the base film.

また、請求項3の発明は、請求項2記載の積層材料を用いて製袋された包装袋である。   The invention of claim 3 is a packaging bag made using the laminated material of claim 2.

このように本発明は、OPPフィルム、ONyフィルム、PETフィルムに対して、高湿度下でも劣化の少ないEVOH系樹脂を塗布した酸素ガスバリア性を有するプラスチックフィルムを作製することができる。
この酸素ガスバリア性を有するプラスチックフィルムを使用し、各種ラミネート加工を施すことにより、酸素ガスバリア性を有する積層材料を形成することが可能になる。
As described above, the present invention can produce a plastic film having an oxygen gas barrier property in which an EVOH-based resin that is less deteriorated even under high humidity is applied to an OPP film, an ONy film, and a PET film.
By using the plastic film having the oxygen gas barrier property and performing various laminating processes, it becomes possible to form a laminated material having the oxygen gas barrier property.

本発明を一実施形態に基づいて以下に詳細に説明する。
本発明の酸素バリア性を有するプラスチックフィルム(10)は、例えば図1に示すように、基材となるプラスチックフィルム(11)に、アミン/エポキシ硬化タイプのウレタン系アンカーコート層(12)を介してEVOH系酸素バリアコート層(13)が塗布されているものである。
The present invention will be described in detail below based on one embodiment.
For example, as shown in FIG. 1, the plastic film (10) having an oxygen barrier property of the present invention is provided on a plastic film (11) serving as a substrate with an amine / epoxy-cured urethane anchor coat layer (12) interposed therebetween. The EVOH-based oxygen barrier coat layer (13) is applied.

プラスチックフィルム(11)は、基材となるフィルムで、延伸ポリプロピレンフィルム、延伸ナイロンフィルム、延伸ポリエチレンテレフタレートフィルムなど一般的に公知のフィルムが使用できる。   The plastic film (11) is a film serving as a substrate, and generally known films such as a stretched polypropylene film, a stretched nylon film, and a stretched polyethylene terephthalate film can be used.

プラスチックフィルム(11)上に塗布される酸素バリアコート層(13)としては、EVOH系無機フィラー微粒子分散タイプのコーティング剤(例えば、サカタインクス株式会社製の開発品など)が好ましく使用できる。塗布方法はグラビア法が好ましく、塗布量は0.4〜0.5g/m2 程度が好ましい。 As the oxygen barrier coat layer (13) applied on the plastic film (11), an EVOH inorganic filler fine particle dispersion type coating agent (for example, a product developed by Sakata Inx Co., Ltd.) can be preferably used. The application method is preferably a gravure method, and the application amount is preferably about 0.4 to 0.5 g / m 2 .

酸素バリアコート層(13)は、プラスチックフィルム(11)上にいきなり形成させても密着性が低いので、プラスチックフィルム(11)上にアンカーコート剤を塗布してアンカーコート層(12)を形成させ、その上から塗布することが好ましい。   The oxygen barrier coat layer (13) has low adhesion even when it is suddenly formed on the plastic film (11). Therefore, an anchor coat agent is applied on the plastic film (11) to form the anchor coat layer (12). It is preferable to apply from above.

アンカーコート剤としては、アミン/エポキシ硬化タイプのウレタン系接着剤(例えば、三井武田ケミカル株式会社製の製品など)が好ましく使用できる。塗布方法はグラビア法が好ましく、塗布量は0.2〜1.0g/m2 程度が好ましい。 As the anchor coating agent, an amine / epoxy curable urethane adhesive (for example, a product manufactured by Mitsui Takeda Chemical Co., Ltd.) can be preferably used. The application method is preferably a gravure method, and the application amount is preferably about 0.2 to 1.0 g / m 2 .

このようにして酸素バリア性を有するプラスチックフィルム(10)を作製することができる。この酸素バリア性を有するプラスチックフィルム(10)の酸素バリアコート層の形成面に接着剤層(14)を介してヒートシール性樹脂層(15)を積層することにより酸素バリア性を有するプラスチックフィルムを用いた積層材料(20)が作製できる(図2参照)。   In this way, a plastic film (10) having oxygen barrier properties can be produced. A plastic film having an oxygen barrier property is obtained by laminating a heat-sealable resin layer (15) through an adhesive layer (14) on an oxygen barrier coat layer forming surface of the plastic film having an oxygen barrier property (10). The used laminated material (20) can be produced (see FIG. 2).

接着剤層(14)を構成する接着剤としては、公知の二液反応型ポリエステル樹脂系接
着剤などが使用できる。また、ヒートシール性樹脂層(15)を構成するヒートシール樹脂としては、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂などが好ましく使用できる。
As an adhesive which comprises an adhesive bond layer (14), a well-known two-component reaction type polyester resin-type adhesive agent etc. can be used. As the heat seal resin constituting the heat sealable resin layer (15), polyolefin resins such as polyethylene and polypropylene can be preferably used.

この積層材料(20)を用いて、ヒートシール性樹脂層(15)を内面にして製袋機を使用して酸素バリア性を有する包装袋(30)を作製することができる。包装袋(30)の形態は、三方シール袋、四方シール袋、ガゼットピロー袋、スタンディングパウチ等任意の形状に対応できる(図3参照)。   Using this laminate material (20), a packaging bag (30) having oxygen barrier properties can be produced using a bag making machine with the heat-sealable resin layer (15) as the inner surface. The form of the packaging bag (30) can correspond to any shape such as a three-side seal bag, a four-side seal bag, a gusset pillow bag, a standing pouch (see FIG. 3).

以下実施例により本発明を詳細に説明する。   Hereinafter, the present invention will be described in detail by way of examples.

基材のプラスチックフィルム(11)として、厚さ12μmの延伸ポリプロピレンフィルムを準備した。   A stretched polypropylene film having a thickness of 12 μm was prepared as a base plastic film (11).

アンカーコート剤として、以下のような配合液を作製した。
・主剤樹脂:タケラック A−369(三井武田ケミカル株式会社製)
・硬化剤樹脂:タケネート A−19(三井武田ケミカル株式会社製)
・溶剤:メタノール
・アンカーコート剤配合比:主剤/硬化剤/溶剤=10/1/6
酸素バリアコーティング剤として、サカタインクス株式会社製のEVOH系無機フィラー微粒子分散タイプ開発品「4B−6」を準備した。
The following compounding liquid was produced as an anchor coating agent.
・ Main resin: Takelac A-369 (Mitsui Takeda Chemical Co., Ltd.)
Curing agent resin: Takenate A-19 (Mitsui Takeda Chemical Co., Ltd.)
・ Solvent: Methanol ・ Anchor coating agent compounding ratio: Main agent / Curing agent / Solvent = 10/6
As an oxygen barrier coating agent, an EVOH-based inorganic filler fine particle dispersion type development product “4B-6” manufactured by Sakata Inx Co., Ltd. was prepared.

延伸ポリプロピレンフィルム(11)にグラビアコート法によりアンカーコート剤を塗布し、アンカーコート層(12)を形成させた。(塗布量は0.6g/m2
ついでその上にグラビアコート法により酸素バリアコーティング剤を塗布し、酸素バリアコート層(13)を形成させた。(塗布量は0.4g/m2
こうして実施例1の酸素バリア性を有するプラスチックフィルムを作製した。
An anchor coating agent was applied to the stretched polypropylene film (11) by a gravure coating method to form an anchor coating layer (12). (The coating amount is 0.6 g / m 2 )
Then, an oxygen barrier coating agent was applied thereon by a gravure coating method to form an oxygen barrier coating layer (13). (The coating amount is 0.4 g / m 2 )
Thus, the plastic film having oxygen barrier properties of Example 1 was produced.

基材のプラスチックフィルム(11)として、厚さ12μmの延伸ナイロンフィルムを用いた以外は、実施例1と同じアンカーコート剤と酸素バリアコーティング剤を用いて実施例1と同じ条件で延伸ナイロンフィルム上に塗布し、実施例2の酸素バリア性を有するプラスチックフィルムを作製した。   On the stretched nylon film under the same conditions as in Example 1 using the same anchor coat agent and oxygen barrier coating agent as in Example 1 except that a stretched nylon film having a thickness of 12 μm was used as the base plastic film (11). The plastic film having an oxygen barrier property of Example 2 was produced.

基材のプラスチックフィルム(11)として、厚さ12μmの延伸ポリエチレンテレフタレートフィルムを用いた以外は、実施例1と同じアンカーコート剤と酸素バリアコーティング剤を用いて実施例1と同じ条件で延伸ポリエチレンテレフタレートフィルム上に塗布し、実施例3の酸素バリア性を有するプラスチックフィルムを作製した。   Stretched polyethylene terephthalate under the same conditions as in Example 1 using the same anchor coat agent and oxygen barrier coating agent as in Example 1 except that a stretched polyethylene terephthalate film having a thickness of 12 μm was used as the base plastic film (11). The plastic film which applied on the film and has the oxygen barrier property of Example 3 was produced.

アンカーコート剤を用いない以外は実施例1と同じ材料、条件でプラスチックフィルムを作製し、比較例となる実施例4の酸素バリア性を有するプラスチックフィルムとした。   A plastic film was produced using the same materials and conditions as in Example 1 except that no anchor coat agent was used, and a plastic film having oxygen barrier properties in Example 4 serving as a comparative example was obtained.

アンカーコート剤を用いない以外は実施例2と同じ材料、条件でプラスチックフィルムを作製し、比較例となる実施例5の酸素バリア性を有するプラスチックフィルムとした。   A plastic film was produced under the same materials and conditions as in Example 2 except that no anchor coat agent was used, and a plastic film having oxygen barrier properties in Example 5 serving as a comparative example was obtained.

アンカーコート剤を用いない以外は実施例3と同じ材料、条件でプラスチックフィルムを作製し、比較例となる実施例6の酸素バリア性を有するプラスチックフィルムとした。   A plastic film was produced using the same materials and conditions as in Example 3 except that no anchor coat agent was used, and a plastic film having oxygen barrier properties in Example 6 serving as a comparative example was obtained.

このようにして作製した実施例1〜実施例6の酸素バリア性を有するプラスチックフィルムについて、それぞれ厚さ50μmのポリエチレンフィルムを酸素バリアコーティング剤塗布面に二液反応型のポリエステル樹脂系接着剤を用いてドライラミネート法により貼り合わせ、それぞれのラミネート強度を測定した。(JIS Z1707による)その結果を表1に示す。   With respect to the plastic films having oxygen barrier properties of Examples 1 to 6 thus produced, a polyethylene film having a thickness of 50 μm and a two-component reaction type polyester resin-based adhesive was used on the oxygen barrier coating agent application surface. Then, they were bonded together by a dry laminating method, and the respective laminate strengths were measured. The results are shown in Table 1 (according to JIS Z1707).

Figure 2007211038
表1に示されているように、実施例1〜3のアンカーコート剤を塗工したプラスチックフィルムは、十分な密着性を有することが分かる。
Figure 2007211038
As shown in Table 1, it can be seen that the plastic films coated with the anchor coating agents of Examples 1 to 3 have sufficient adhesion.

本発明の酸素バリア性を有するプラスチックフィルムの一実施例を示す、断面説明図である。It is sectional explanatory drawing which shows one Example of the plastic film which has oxygen barrier property of this invention. 本発明の酸素バリア性を有するプラスチックフィルムを用いた積層材料の一実施例を示す、断面説明図である。It is a section explanatory view showing one example of a lamination material using the plastic film which has oxygen barrier properties of the present invention. (a)、(b)は、図2の積層材料を用いて作製した包装袋の一実施例を示す、平面説明図である。(A), (b) is plane explanatory drawing which shows one Example of the packaging bag produced using the laminated material of FIG.

符号の説明Explanation of symbols

10‥‥酸素バリア性を有するプラスチックフィルム
11‥‥プラスチックフィルム
12‥‥アンカーコート層
13‥‥酸素バリアコート層
14‥‥接着剤層
15‥‥ヒートシール性樹脂層
20‥‥積層材料
30‥‥包装袋
10. Plastic film having oxygen barrier property 11 Plastic film 12 Anchor coat layer 13 Oxygen barrier coat layer 14 Adhesive layer 15 Heat seal resin layer 20 Laminated material 30 Packaging bag

Claims (3)

基材となるプラスチックフィルムに、アミン/エポキシ硬化タイプのウレタン系アンカーコート層を介してエチレンビニルアルコール共重合体系酸素バリアコート層が塗布されていることを特徴とする、酸素バリア性を有するプラスチックフィルム。   A plastic film having an oxygen barrier property, characterized in that an ethylene vinyl alcohol copolymer-based oxygen barrier coat layer is applied to a plastic film as a base material via an amine / epoxy curable urethane anchor coat layer . 請求項1記載の酸素バリア性を有するプラスチックフィルムの酸素バリアコート層の上に、接着剤層を介してヒートシール性樹脂層が積層されていることを特徴とする、酸素バリア性を有するプラスチックフィルムを用いた積層材料。   A plastic film having an oxygen barrier property, wherein a heat-sealable resin layer is laminated on an oxygen barrier coat layer of the plastic film having an oxygen barrier property according to claim 1 through an adhesive layer. Laminate material using. 請求項2記載の積層材料を用いて製袋された包装袋。   A packaging bag made using the laminated material according to claim 2.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010058839A (en) * 2008-09-08 2010-03-18 Toppan Printing Co Ltd Easily openable pillow packaging bag

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