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JPH07266490A - Non-oriented polypropylene film - Google Patents

Non-oriented polypropylene film

Info

Publication number
JPH07266490A
JPH07266490A JP6087570A JP8757094A JPH07266490A JP H07266490 A JPH07266490 A JP H07266490A JP 6087570 A JP6087570 A JP 6087570A JP 8757094 A JP8757094 A JP 8757094A JP H07266490 A JPH07266490 A JP H07266490A
Authority
JP
Japan
Prior art keywords
layer
polypropylene film
resin
gas barrier
oriented polypropylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6087570A
Other languages
Japanese (ja)
Inventor
Hisayoshi Ogino
荻野久佳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reiko Co Ltd
Original Assignee
Reiko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reiko Co Ltd filed Critical Reiko Co Ltd
Priority to JP6087570A priority Critical patent/JPH07266490A/en
Publication of JPH07266490A publication Critical patent/JPH07266490A/en
Pending legal-status Critical Current

Links

Landscapes

  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Laminated Bodies (AREA)

Abstract

PURPOSE:To obtain a non-oriented polypropylene film having excellent gas barrier property by forming a gas barrier layer, which is obtained by integrating an Al deposition layer and a polyester resin layer, on the surface of the non- oriented polypropylene film. CONSTITUTION:On a surface of a non-oriented polypropylene film, a gas barrier layer, which is formed by making an Al deposition layer having a thickness of 500Angstrom or less and a resin layer consisting of polyester resin or ethylene vinyl alcohol copolymeric resin contact with each other directly so as to integrate them, is formed with the Al deposition layer at the inside. The Al deposition layer is formed on the non-oriented polypropylene film by vacuum deposition, sputtering, and ion plating. Also, the top of the Al deposition layer is directly coated with the polyester resin for making a thickness of a dried layer of 0.6mum by a gravure coater so as to form the resin layer.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、スナック菓子類などの
高ガスバリア性が要求される包装袋に使用すれば特に有
益な、高ガスバリア性の無延伸ポリプロピレンフイルム
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unstretched polypropylene film having a high gas barrier property, which is particularly useful when used in a packaging bag such as snacks requiring a high gas barrier property.

【0002】[0002]

【従来の技術】スナック菓子類は内容物の割れ防止、酸
化による腐敗防止のために、その包装袋内にガスを充満
させて出荷されるものが多く、包装袋には高いガスバリ
ア性が要求される。そして、包装袋の材料としては、柔
軟性、製袋性などの観点から、無延伸ポリプロピレンフ
イルムが一般に使用されていて、そのガスバリア性を向
上させるために、無延伸ポリプロピレンフイルムの表面
にガスバリア層としてAl蒸着層を形成したものが使用
されている。
2. Description of the Related Art Many snack confectioneries are shipped with the packaging bag filled with gas in order to prevent cracking of the contents and to prevent spoilage due to oxidation, and the packaging bag is required to have a high gas barrier property. . And as the material of the packaging bag, from the viewpoint of flexibility, bag-making property, etc., an unstretched polypropylene film is generally used, and in order to improve its gas barrier property, a gas barrier layer is formed on the surface of the unstretched polypropylene film. What formed the Al vapor deposition layer is used.

【0003】[0003]

【発明が解決しようとする課題】しかし、無延伸ポリプ
ロピレンフイルムは耐熱性が悪いので、Al蒸着層は厚
く形成することができず、Al蒸着層の厚さは500Å
以下である。そして、500Åの厚さのAl蒸着層を形
成した無延伸ポリプロピレンフイルムの酸素ガス透過量
は8〜10cc/m2 ・24hrであるから、ガスバリ
ア性は充分とはいえず、高ガスバリア性の無延伸ポリプ
ロピレンフイルムが切望されている。本発明は上記の欠
点を除去したもので、高ガスバリア性の無延伸ポリプロ
ピレンフイルムを提供するものである。
However, since the unstretched polypropylene film has poor heat resistance, the Al vapor deposition layer cannot be formed thick, and the Al vapor deposition layer has a thickness of 500Å.
It is the following. Further, since the oxygen gas permeation amount of the unstretched polypropylene film formed with the Al vapor-deposited layer having a thickness of 500Å is 8 to 10 cc / m 2 · 24 hr, the gas barrier property is not sufficient, and the high gas barrier property of the unstretched film is not exhibited. A polypropylene film is eagerly awaited. The present invention eliminates the above drawbacks and provides an unstretched polypropylene film having a high gas barrier property.

【0004】[0004]

【課題を解決するための手段】本発明は、無延伸ポリプ
ロピレンフイルムの表面に、500Å以下の厚さのAl
蒸着層と、ポリエステル系樹脂、エチレンビニルアルコ
ール共重合樹脂又は酢ビ変性ポリエチレン樹脂からなる
樹脂層とが直接に接して一体となったガスバリア層を、
Al蒸着層を内側として形成したことを特徴とする高ガ
スバリア性無延伸ポリプロピレンフイルムである。
DISCLOSURE OF THE INVENTION The present invention relates to an unstretched polypropylene film whose surface has an Al thickness of 500 Å or less
A vapor barrier layer and a resin layer composed of a polyester resin, an ethylene vinyl alcohol copolymer resin or a vinyl acetate modified polyethylene resin are in direct contact with each other to form an integrated gas barrier layer,
It is a high gas barrier unstretched polypropylene film having an Al vapor deposition layer formed inside.

【0005】無延伸ポリプロピレンフイルムの厚さは特
に限定しないが、包装袋に使用する場合は15〜100
μmが好ましい。
The thickness of the unstretched polypropylene film is not particularly limited, but when it is used for a packaging bag, it is 15 to 100.
μm is preferred.

【0006】ガスバリア層の中の500Å以下の厚さの
Al蒸着層は、真空蒸着、スパッタリング、イオンプレ
ーティングなどにより、無延伸ポリプロピレンフイルム
の上に形成することができる。Al蒸着層を無延伸ポリ
プロピレンフイルムの上に形成する場合には、無延伸ポ
リプロピレンフイルムに適宜の下地処理を施してその上
からAl蒸着層を形成してもよい。
The Al vapor deposition layer having a thickness of 500 Å or less in the gas barrier layer can be formed on the unstretched polypropylene film by vacuum vapor deposition, sputtering, ion plating or the like. When the Al vapor deposition layer is formed on the non-stretched polypropylene film, the non-stretched polypropylene film may be subjected to an appropriate undercoating treatment to form the Al vapor deposition layer thereon.

【0007】ガスバリア層の中のポリエステル系樹脂、
エチレンビニルアルコール共重合樹脂又は酢ビ変性ポリ
エチレン樹脂からなる樹脂層は、ポリエステル系樹脂、
エチレンビニルアルコール共重合樹脂又は酢ビ変性ポリ
エチレン樹脂を使用して、グラビアコーターなどにより
形成することができる。ポリエステル系樹脂、エチレン
ビニルアルコール共重合樹脂又は酢ビ変性ポリエチレン
樹脂からなる樹脂層の厚さは特に限定しないが、価格、
カール性、作業性の観点からは、0.5〜4.0μmが
好ましい。
Polyester resin in the gas barrier layer,
The resin layer made of ethylene vinyl alcohol copolymer resin or vinyl acetate modified polyethylene resin is a polyester resin,
It can be formed by a gravure coater using ethylene vinyl alcohol copolymer resin or vinyl acetate modified polyethylene resin. The thickness of the resin layer made of polyester resin, ethylene vinyl alcohol copolymer resin or vinyl acetate modified polyethylene resin is not particularly limited, but the price,
From the viewpoint of curling property and workability, 0.5 to 4.0 μm is preferable.

【0008】ポリエステル系樹脂、エチレンビニルアル
コール共重合樹脂又は酢ビ変性ポリエチレン樹脂からな
る樹脂層は、無延伸ポリプロピレンフイルムの上に形成
したAl蒸着層の上に形成することができる。上記の樹
脂層を無延伸ポリプロピレンフイルムの上に形成したA
l蒸着層の上に形成する場合には、該樹脂層はAl蒸着
層の上に直接に形成して、該樹脂層とAl蒸着層とが直
接に接して一体となったガスバリア層を構成するように
形成する。
The resin layer made of polyester resin, ethylene vinyl alcohol copolymer resin or vinyl acetate modified polyethylene resin can be formed on the Al vapor deposition layer formed on the unstretched polypropylene film. The above resin layer was formed on an unstretched polypropylene film A
In the case of forming on the vapor-deposited layer, the resin layer is directly formed on the Al vapor-deposited layer, and the resin layer and the Al vapor-deposited layer are in direct contact to form an integrated gas barrier layer. To form.

【0009】[0009]

【実施例】【Example】

実施例1 厚さ25μmの無延伸ポリプロピレンフイルムの片面
に、真空蒸着により厚さ450ÅのAl蒸着層を形成
し、該Al蒸着層の上に直接、ポリエステル系樹脂(東
洋モートン社製アドコードAD335A)を乾燥層厚
0.6μmになるようグラビアコーターで塗布してポリ
エステル系樹脂からなる樹脂層を形成して、本発明の高
ガスバリア性無延伸ポリプロピレンフイルムを得た。次
に、得られた高ガスバリア性無延伸ポリプロピレンフイ
ルムを樹脂層を内側として、接着剤としてポリエステル
系樹脂(武田薬品社製タケラックA−310)とイソシ
アネート硬化剤(武田薬品社製タケネートA−3)を混
合したものを使用して、乾燥層厚2.0μmにて二軸延
伸ポリプロピレンフイルムとドライラミネートした。こ
のドライラミネートした試料の酸素ガスの透過量を、ガ
ス透過率測定機で測定した。測定結果は下記の表の通り
であった。
Example 1 An aluminum vapor-deposited layer having a thickness of 450 Å was formed by vacuum vapor deposition on one surface of an unstretched polypropylene film having a thickness of 25 μm, and a polyester resin (Ad Code AD335A manufactured by Toyo Morton Co., Ltd.) was directly formed on the aluminum vapor-deposited layer. Was applied by a gravure coater so as to have a dry layer thickness of 0.6 μm to form a resin layer made of a polyester resin to obtain a high gas barrier unstretched polypropylene film of the present invention. Next, the obtained high gas barrier unstretched polypropylene film with the resin layer as the inside, a polyester resin (Takelac A-310 manufactured by Takeda Pharmaceutical Co., Ltd.) as an adhesive and an isocyanate curing agent (Takenate A-3 manufactured by Takeda Pharmaceutical Co., Ltd.) Was mixed and used for dry lamination with a biaxially oriented polypropylene film with a dry layer thickness of 2.0 μm. The permeation amount of oxygen gas of this dry-laminated sample was measured with a gas permeability measuring device. The measurement results are shown in the table below.

【0010】実施例2 樹脂層をエチレンビニルアルコール共重合樹脂(日本合
成化学工業社製)からなるものとした他は実施例1と同
様にした。
Example 2 Same as Example 1 except that the resin layer was made of ethylene vinyl alcohol copolymer resin (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.).

【0011】実施例3 樹脂層を酢ビ変性ポリエチレン樹脂(東洋モートン社
製)からなるものとした他は実施例1と同様にした。
Example 3 Same as Example 1 except that the resin layer was made of vinyl acetate modified polyethylene resin (manufactured by Toyo Morton Co., Ltd.).

【0012】比較例1 樹脂層を形成しない他は実施例1と同様にした。Comparative Example 1 Same as Example 1 except that the resin layer was not formed.

【0013】比較例2 Al層を形成しない他は実施例1と同様にした。但し、
樹脂層の乾燥層厚を3μmとした。
Comparative Example 2 The same as Example 1 except that the Al layer was not formed. However,
The dry layer thickness of the resin layer was 3 μm.

【0014】比較例3 Al層を形成しない他は実施例2と同様にした。但し、
樹脂層の乾燥層厚を3μmとした。
Comparative Example 3 The same as Example 2 except that the Al layer was not formed. However,
The dry layer thickness of the resin layer was 3 μm.

【0015】比較例4 Al層を形成しない他は実施例3と同様にした。但し、
樹脂層の乾燥層厚を3μmとした。
Comparative Example 4 The same as Example 3 except that the Al layer was not formed. However,
The dry layer thickness of the resin layer was 3 μm.

【0016】 表(酸素ガス透過量測定値 cc/m2 ・24hr) 実施例1 2.65 実施例2 0.65 実施例3 5.20 比較例1 15.20 比較例2 1000.00以上 比較例3 13.00 比較例4 500.00Table (measured value of oxygen gas permeation amount cc / m 2 · 24 hr) Example 1 2.65 Example 2 0.65 Example 3 5.20 Comparative Example 1 15.20 Comparative Example 2 1000.00 or more Comparison Example 3 13.00 Comparative Example 4 500.00

【0017】[0017]

【発明の効果】本発明は上記のように構成したから、前
記の酸素ガス透過量測定結果からも明らかなように、例
えばAl蒸着層の厚さが450Åで本発明の樹脂層を形
成しない場合の酸素ガス透過量が15.20であるのに
対して、本発明のポリエステル系樹脂からなる樹脂層を
形成した場合には2.65であり、また、本発明のエチ
レンビニルアルコール共重合樹脂からなる樹脂層を形成
した場合には0.65であり、さらに、本発明の酢ビ変
性ポリエチレン樹脂からなる樹脂層を形成した場合には
5.20であり、ガスバリア性が非常に優れた高ガスバ
リア性である。
Since the present invention is constituted as described above, as is apparent from the above-mentioned measurement results of oxygen gas permeation amount, for example, when the thickness of the Al vapor deposition layer is 450 Å and the resin layer of the present invention is not formed. Oxygen gas permeation amount of 15.20 is 2.20, whereas it is 2.65 when the resin layer made of the polyester resin of the present invention is formed, and from the ethylene vinyl alcohol copolymer resin of the present invention Is 0.65 when the resin layer made of the above is formed, and 5.20 when the resin layer made of the vinyl acetate-modified polyethylene resin of the present invention is formed, which is a high gas barrier having an extremely excellent gas barrier property. It is sex.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】無延伸ポリプロピレンフイルムの表面に、
500Å以下の厚さのAl蒸着層と、ポリエステル系樹
脂、エチレンビニルアルコール共重合樹脂又は酢ビ変性
ポリエチレン樹脂からなる樹脂層とが直接に接して一体
となったガスバリア層を、Al蒸着層を内側として形成
したことを特徴とする高ガスバリア性無延伸ポリプロピ
レンフイルム。
1. A surface of an unstretched polypropylene film,
A gas barrier layer in which an Al vapor-deposited layer having a thickness of 500 Å or less and a resin layer made of polyester resin, ethylene vinyl alcohol copolymer resin or vinyl acetate modified polyethylene resin is directly in contact with and integrated with the Al vapor-deposited layer inside An unstretched polypropylene film having a high gas barrier property, which is characterized by being formed as.
JP6087570A 1994-03-31 1994-03-31 Non-oriented polypropylene film Pending JPH07266490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6087570A JPH07266490A (en) 1994-03-31 1994-03-31 Non-oriented polypropylene film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6087570A JPH07266490A (en) 1994-03-31 1994-03-31 Non-oriented polypropylene film

Publications (1)

Publication Number Publication Date
JPH07266490A true JPH07266490A (en) 1995-10-17

Family

ID=13918665

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6087570A Pending JPH07266490A (en) 1994-03-31 1994-03-31 Non-oriented polypropylene film

Country Status (1)

Country Link
JP (1) JPH07266490A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1036813A1 (en) * 1999-03-18 2000-09-20 Danisco Flexible Schüpbach AG Films with barrier layers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1036813A1 (en) * 1999-03-18 2000-09-20 Danisco Flexible Schüpbach AG Films with barrier layers

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