JPH06238847A - Co-extruded composite film - Google Patents
Co-extruded composite filmInfo
- Publication number
- JPH06238847A JPH06238847A JP2443393A JP2443393A JPH06238847A JP H06238847 A JPH06238847 A JP H06238847A JP 2443393 A JP2443393 A JP 2443393A JP 2443393 A JP2443393 A JP 2443393A JP H06238847 A JPH06238847 A JP H06238847A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- composite film
- resin layer
- polyamide resin
- film
- 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
Links
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は共押出複合フイルムに係
り、特に光沢、透明性、ラベル接着性、耐ピンホール性
等に優れたボイル殺菌可能な深絞り成形用共押出複合フ
イルムとして好適に使用できる高剛性の共押出複合フイ
ルムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coextrusion composite film, and is particularly suitable as a deep extrusion molding coextrusion composite film which is excellent in gloss, transparency, label adhesion, pinhole resistance and the like and can be sterilized by boiling. The present invention relates to a high-rigidity coextrusion composite film that can be used.
【０００２】[0002]
【従来技術とその課題】深絞り成形した底材に不定形ハ
ム等の包装物を充填し、蓋材をシールした後、熱水によ
りボイル殺菌することがなされ、このようなボイル殺菌
用の深絞り成形底材用フイルムとして、無延伸ポリア
ミド樹脂層／シール性樹脂層、無延伸ポリプロピレン
樹脂層／無延伸ポリアミド樹脂層（Ｋコートポリアミド
樹脂層）／シール性樹脂層からなるドライラミネート品
が使用されているが、成形後の耐ピンホール性に劣り、
またカールしやすいという問題があった。さらに各種層
構成からなる共押出品の最外層に無延伸ポリプロピレン
樹脂層をドライラミネートしたものも使用されている
が、光沢、透明性及び成形品の表面にラベルを貼る際、
ラベルが剥げやすくラベル接着性に劣る等の問題があっ
た。2. Description of the Related Art A deep-drawing bottom material is filled with a package such as an indeterminate ham, and a lid material is sealed, followed by hot water sterilization for boiling. As a film for draw-molded bottom material, a dry laminated product composed of an unstretched polyamide resin layer / sealable resin layer, an unstretched polypropylene resin layer / unstretched polyamide resin layer (K-coated polyamide resin layer) / sealable resin layer is used. However, it is inferior in pinhole resistance after molding,
There was also the problem of curling. Furthermore, the outermost layer of the coextruded product consisting of various layer configurations, which is dry laminated with an unstretched polypropylene resin layer, is also used, but when attaching a label to the surface of gloss, transparency and molded products,
There was a problem that the label was easily peeled off and the label adhesiveness was poor.
【０００３】[0003]
【課題を解決するための手段】本発明は上記問題を解消
できる共押出複合フイルムを見出たものであって、その
要旨とするところは、最外層をポリカーボネート樹脂
層、最内層をシール性樹脂層とし、中間層にポリアミド
樹脂層又はポリアミド樹脂層とエチレン酢酸ビニル共重
合体ケン化物層からなるバリアー性樹脂層を配し、最外
層と中間層の間及び最内層と中間層の間にポリオレフイ
ン系接着樹脂層を配してなる共押出複合フイルムにあ
る。DISCLOSURE OF THE INVENTION The present invention has found out a coextrusion composite film capable of solving the above problems, and the gist of the invention is that the outermost layer is a polycarbonate resin layer and the innermost layer is a sealing resin. As a layer, a barrier resin layer composed of a polyamide resin layer or a polyamide resin layer and a saponified ethylene vinyl acetate copolymer layer is arranged in the intermediate layer, and polyolefin resin is provided between the outermost layer and the intermediate layer and between the innermost layer and the intermediate layer. It is a coextrusion composite film having a system adhesive resin layer.
【０００４】ポリカーボネート樹脂（以下「ＰＣ」とい
う）を最外層に配したのは、ボイル殺菌処理におけるフ
イルムの白化や包装体同志のブロッキング（湿熱ブロッ
キング）を防止するのに有効であり、またフイルムに光
沢、透明性を付与でき、さらにラベル接着性を改良する
のに有効であるためである。ＰＣの分子量は２５，００
０以下が好ましく、２５，０００を越えるものでは成形
温度が高くなり、成形性に劣り易い傾向がある。このＰ
Ｃ層の厚みは、フイルム全体厚みの１５〜３０％の範囲
とすればよく、フイルム全体厚みの１５％未満では、フ
イルムの剛性がなくカールしやすく、３０％を越えると
成形性に劣り、厚み分布が悪くなるという問題がある。Placing a polycarbonate resin (hereinafter referred to as "PC") in the outermost layer is effective in preventing whitening of the film and blocking of the packaging members (wet heat blocking) in the sterilization treatment by boiling, and also in the film. This is because it can impart gloss and transparency and is effective in improving label adhesiveness. The molecular weight of PC is 25,000
It is preferably 0 or less, and if it exceeds 25,000, the molding temperature tends to be high and the moldability tends to be poor. This P
The thickness of the C layer may be in the range of 15 to 30% of the total thickness of the film. If it is less than 15% of the total thickness of the film, the film has no rigidity and tends to curl, and if it exceeds 30%, the formability is poor. There is a problem that the distribution becomes worse.
【０００５】最内層のシール性樹脂層にはアイオノマー
樹脂、ポリエチレン、またはエチレンと他の成分との共
重合体、例えばエチレン−酢酸ビニル共重合体等が使用
でき、厚みは３０〜１５０μｍの範囲で好適に使用でき
る。For the innermost sealing resin layer, an ionomer resin, polyethylene, or a copolymer of ethylene and other components such as ethylene-vinyl acetate copolymer can be used, and the thickness is in the range of 30 to 150 μm. It can be preferably used.
【０００６】中間層はバリアー性樹脂層であり、ポリア
ミド樹脂層又はポリアミド樹脂層とエチレン酢酸ビニル
共重合体ケン化物（以下「ＥＶＯＨ」という）層から構
成されている。ポリアミド樹脂としては、ナイロン６、
ナイロン６６、ナイロン６／６６、ナイロン６Ｔ／６Ｉ
等が好適に使用できる。ＥＶＯＨとしては、エチレン含
有率が３０〜６０モル％で、けん化度が９５％以上のも
のが、成形性やバリアー性の点から好ましい。The intermediate layer is a barrier resin layer and is composed of a polyamide resin layer or a polyamide resin layer and a saponified ethylene vinyl acetate copolymer (hereinafter referred to as "EVOH") layer. As the polyamide resin, nylon 6,
Nylon 66, Nylon 6/66, Nylon 6T / 6I
And the like can be preferably used. The EVOH having an ethylene content of 30 to 60 mol% and a saponification degree of 95% or more is preferable from the viewpoint of moldability and barrier properties.
【０００７】中間層の厚さはポリアミド樹脂層のみの場
合、１０〜１００μｍの範囲とすればよく、ポリアミド
樹脂層とＥＶＯＨ層から構成したものではポリアミド樹
脂層を１０〜７０μｍ、ＥＶＯＨ層を１０〜３０μｍの
範囲とすればよい。The thickness of the intermediate layer may be in the range of 10 to 100 μm in the case of the polyamide resin layer only, and in the case of the polyamide resin layer and the EVOH layer, the thickness of the polyamide resin layer is 10 to 70 μm and the EVOH layer is 10 to 10 μm. The range may be 30 μm.
【０００８】上記の最外層と中間層の間、及び最内層と
中間層の間にはポリオレフイン系接着樹脂層を設ける必
要があり、使用するポリオレフイン系接着樹脂として
は、不飽和カルボン酸またはその誘導体から選ばれた少
なくとも一種のモノマーをグラフトした変性ポリオレフ
ィン樹脂が好適に使用でき、ＰＣ層、中間層、シール性
樹脂層間をそれぞれ強固に接着できる。また、ピンホー
ルが発生しやすいバリアー性樹脂層の両側に耐ピンホー
ル性に優れたポリオレフイン系接着樹脂層を配したこと
によりフイルム全体の耐ピンホール性を改良できる。各
ポリオレフイン系接着樹脂層の厚みは５〜２０μｍの範
囲とすればよい。It is necessary to provide a polyolefin resin adhesive layer between the outermost layer and the intermediate layer and between the innermost layer and the intermediate layer. The polyolefin resin used as the polyolefin adhesive resin is an unsaturated carboxylic acid or a derivative thereof. A modified polyolefin resin grafted with at least one monomer selected from the following can be preferably used, and the PC layer, the intermediate layer, and the sealing resin layer can be firmly adhered to each other. In addition, the pinhole resistance of the entire film can be improved by arranging the polyolefin-based adhesive resin layer having excellent pinhole resistance on both sides of the barrier resin layer where pinholes are likely to occur. The thickness of each polyolefin adhesive resin layer may be in the range of 5 to 20 μm.
【０００９】本発明は上記構成からなる樹脂層を共押出
し法により積層するので透明性、光沢、深絞り成形性及
び、耐ピンホール性が良好であり、また９０℃以上のボ
イル殺菌処理時、湿熱ブロッキング、フイルムの白化、
カール等が発生しない物性、外観ともに優れた複合フイ
ルムが得られる。In the present invention, the resin layers having the above-mentioned constitution are laminated by the coextrusion method, so that the transparency, gloss, deep drawability and pinhole resistance are good, and when sterilizing by boiling at 90 ° C. or higher, Moist heat blocking, film whitening,
It is possible to obtain a composite film having excellent physical properties and appearance without curling or the like.
【００１０】ここで、上記の構成からなる複合フイルム
の引張弾性率は１００ｋｇｆ／ｍｍ2 以上（測定温度：
２３℃）のものが剛性の点から好ましく、最外層の厚み
や全体の厚みにより調整することができる。引張弾性率
が１００ｋｇｆ／ｍｍ2 未満では、剛性が低いため、例
えばフイルム表面に印刷を施す用途では印刷柄がずれや
すいという問題等がある。Here, the tensile modulus of elasticity of the composite film having the above structure is 100 kgf / mm 2 or more (measurement temperature:
23 ° C.) is preferable from the viewpoint of rigidity, and can be adjusted by the thickness of the outermost layer or the total thickness. When the tensile elastic modulus is less than 100 kgf / mm 2 , the rigidity is low, so that there is a problem that the printed pattern is easily displaced, for example, in the application of printing on the film surface.
【００１１】以下、本発明を実施例にて説明する。The present invention will be described below with reference to examples.
【００１２】[0012]
実施例１ 層構成：最外層（第１層）：ＰＣ、第２層：カルボン酸
変性エチレン−酢酸ビニル共重合体（ＡＤ），第３層：
ナイロン−６、第４層：カルボン酸変性エチレン−酢酸
ビニル共重合体（ＡＤ）、第５層：直鎖低密度ポリエチ
レンを配した構成。Example 1 Layer structure: Outermost layer (first layer): PC, Second layer: Carboxylic acid-modified ethylene-vinyl acetate copolymer (AD), Third layer:
A configuration in which nylon-6, a fourth layer: a carboxylic acid-modified ethylene-vinyl acetate copolymer (AD), and a fifth layer: a linear low-density polyethylene are arranged.
【００１３】厚み：ＰＣ ／ＡＤ ／ナイロン−６／Ａ
Ｄ／ＬＬＤＰＥ（１０μｍ／１５μｍ／６０μｍ／１０
μｍ／１００μｍ） 上記構成の複合フイルムを共押出し成形法により製膜し
た。ついで複合フイルムを第１層が外側になるように、
ムルチバック（株）製の深絞り包装機（Ｒ−７０００）
で絞り成形した。成形加工した孔の中に不定形ハムを充
填し、蓋材（無延伸ポリプロピレン／Ｋコートセロファ
ン／エチレン−酢酸ビニル共重合体からなるドライラミ
ネートフイルム）を被せて真空包装により包装体を得
た。Thickness: PC / AD / nylon-6 / A
D / LLDPE (10 μm / 15 μm / 60 μm / 10
(μm / 100 μm) The composite film having the above structure was formed into a film by a coextrusion molding method. Then put the composite film so that the first layer is on the outside.
Deep drawing packaging machine (R-7000) made by Multibag Co., Ltd.
It was drawn and molded. An amorphous ham was filled in the formed holes, covered with a lid material (a non-stretched polypropylene / K-coated cellophane / dry laminate film made of ethylene-vinyl acetate copolymer) and vacuum-packed to obtain a package.
【００１４】得られた包装体を９８℃で３０分間のボイ
ル殺菌を行ない、処理直後における包装体の湿熱ブロッ
キング及びフイルムの白化（耐ボイル性）を評価し、さ
らに包装体を２℃の冷蔵庫に１日保管した後、フイルム
の光沢と表面にラベルを貼って接着の程度（ラベル接着
性）を評価した。The obtained package was sterilized by boiling at 98 ° C. for 30 minutes to evaluate the moisture heat blocking of the package and the whitening of the film (boil resistance) immediately after the treatment, and the package was placed in a refrigerator at 2 ° C. After storage for 1 day, the gloss of the film and a label on the surface were evaluated to evaluate the degree of adhesion (label adhesion).
【００１５】また、上記保管後の包装体２０個をＡ式ダ
ブルのダンボールケースに入れ１．５ｍの高さから落下
を６回実施して真空洩れの発生（耐ピンホール性）を評
価した。20 packs after the above-mentioned storage were put in a type A double cardboard case and dropped 6 times from a height of 1.5 m to evaluate the occurrence of vacuum leakage (pinhole resistance).
【００１６】上記方法で評価した結果、耐ボイル性、光
沢、ラベル接着性および耐ピンホール性のいずれも良好
であった。なお、耐ピンホール性ではピンホールの発生
は全くなかった。As a result of evaluation by the above method, all of the boil resistance, gloss, label adhesion and pinhole resistance were good. Note that no pinhole was generated in the pinhole resistance.
【００１７】実施例２ 層構成：第３層がナイロン−６／ＥＶＯＨからなる以外
は、実施例１の層構成と同一。 厚み：ＰＣ ／ＡＤ ／ナイロン−６／ＥＶＯＨ／ＡＤ
／ＬＬＤＰＥ（１５μｍ／１０μｍ／６０μｍ／１５μ
ｍ／１０μｍ／９０μｍ） 実施例１と同一の方法で包装体を得た後、評価を行った
結果、実施例１と同様に耐ボイル性、光沢、ラベル接着
性および耐ピンホール性のいずれも良好であった。Example 2 Layer Structure: Same as the layer structure of Example 1 except that the third layer was made of nylon-6 / EVOH. Thickness: PC / AD / Nylon-6 / EVOH / AD
/ LLDPE (15μm / 10μm / 60μm / 15μ
m / 10 μm / 90 μm) After obtaining a package in the same manner as in Example 1, the evaluation was performed. As a result, as in Example 1, any of boil resistance, gloss, label adhesion and pinhole resistance was exhibited. It was good.
【００１８】比較例１ 層構成： ナイロン−６／エチレン−酢酸ビニル共重合
体 構成のドライラミネートフイルム 厚み： （６０μｍ／１４０μｍ） 実施例１と同一の方法で包装体を得た後、評価を行った
結果、耐ボイル性、光沢およびラベル接着性は優れてい
たが、耐ピンホール性に劣った。（包装体の１０％にピ
ンホールが発生した。） 比較例２ 層構成： 無延伸ポリプロピレン／ナイロン−６／エチ
レン−酢酸ビニル共重合体構成のドライラミネートフイ
ルム 厚み： （３０μｍ／６０μｍ／１１０μｍ） 実施例１と同一の方法で包装体を得た後、評価を行った
結果、耐ボイル性および耐ピンホール性は優れていた
が、光沢、ラベル接着性に劣った。Comparative Example 1 Layer constitution: Nylon-6 / ethylene-vinyl acetate copolymer Dry laminate film constitution Thickness: (60 μm / 140 μm) After obtaining a package in the same manner as in Example 1, evaluation was carried out. As a result, the boil resistance, gloss and label adhesion were excellent, but the pinhole resistance was poor. (Pinholes were generated in 10% of the package.) Comparative Example 2 Layer structure: dry-stretch film of unstretched polypropylene / nylon-6 / ethylene-vinyl acetate copolymer structure Thickness: (30 μm / 60 μm / 110 μm) Implementation After a package was obtained by the same method as in Example 1, the evaluation was performed. As a result, the boil resistance and the pinhole resistance were excellent, but the gloss and the label adhesiveness were poor.
【００１９】[0019]
【発明の効果】上述したように本発明の共押出複合フイ
ルムによれば、光沢、透明性、ラベル接着性、耐ピンホ
ール性等に優れており、ボイル殺菌処理を要する食品の
包装に好適に使用でき、また、高剛性を有することから
印刷による柄ずれがなく、表面に印刷を施してなる各種
包装材として好適に使用できる。As described above, according to the coextrusion composite film of the present invention, it is excellent in gloss, transparency, label adhesiveness, pinhole resistance, etc., and is suitable for packaging foods that require boiling sterilization. It can be used, and since it has high rigidity, it can be suitably used as various packaging materials having a printed surface without pattern shift due to printing.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 原子 茂也 滋賀県長浜市三ツ矢町５番８号 三菱樹脂 株式会社長浜工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeya Atomo 5-8 Mitsuyacho, Nagahama-shi, Shiga Mitsubishi Plastics Co., Ltd. Nagahama factory
Claims (2)
層をシール性樹脂層とし、中間層にポリアミド樹脂層又
はポリアミド樹脂層とエチレン酢酸ビニル共重合体ケン
化物層からなるバリアー性樹脂層を配し、最外層と中間
層の間及び最内層と中間層の間にポリオレフイン系接着
樹脂層を配してなる共押出複合フイルム。1. A polycarbonate resin layer is used as an outermost layer, a sealing resin layer is used as an innermost layer, and a polyamide resin layer or a barrier resin layer composed of a polyamide resin layer and a saponified ethylene vinyl acetate copolymer layer is provided as an intermediate layer. A coextrusion composite film having a polyolefin resin adhesive layer between the outermost layer and the intermediate layer and between the innermost layer and the intermediate layer.
１５〜３０％であるとともに複合フイルムの引張弾性率
が１００ｋｇｆ／ｍｍ2 以上であることを特徴とする請
求項１記載の共押出複合フイルム。2. The coextruded composite film according to claim 1, wherein the outermost layer has a thickness of 15 to 30% of the total thickness of the composite film and the tensile modulus of the composite film is 100 kgf / mm 2 or more. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2443393A JPH06238847A (en) | 1993-02-12 | 1993-02-12 | Co-extruded composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2443393A JPH06238847A (en) | 1993-02-12 | 1993-02-12 | Co-extruded composite film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06238847A true JPH06238847A (en) | 1994-08-30 |
Family
ID=12138026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2443393A Pending JPH06238847A (en) | 1993-02-12 | 1993-02-12 | Co-extruded composite film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06238847A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5705303A (en) * | 1994-02-17 | 1998-01-06 | Fuji Xerox Co., Ltd. | Toner composition for electrophotography |
| EP0919366A1 (en) * | 1996-06-10 | 1999-06-02 | Sumitomo Bakelite Company Limited | Composite sheet for food container |
| US6042979A (en) * | 1997-12-17 | 2000-03-28 | Fuji Xerox Co., Ltd. | Toner for developer of electrostatic latent image, method for producing toner for developer of electrostatic latent image, developer of electrostatic latent image and method for forming image |
-
1993
- 1993-02-12 JP JP2443393A patent/JPH06238847A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5705303A (en) * | 1994-02-17 | 1998-01-06 | Fuji Xerox Co., Ltd. | Toner composition for electrophotography |
| EP0919366A1 (en) * | 1996-06-10 | 1999-06-02 | Sumitomo Bakelite Company Limited | Composite sheet for food container |
| US6042979A (en) * | 1997-12-17 | 2000-03-28 | Fuji Xerox Co., Ltd. | Toner for developer of electrostatic latent image, method for producing toner for developer of electrostatic latent image, developer of electrostatic latent image and method for forming image |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5567533A (en) | Antifog film laminates | |
| US6630237B2 (en) | Peelably sealed packaging | |
| JP4920422B2 (en) | Thermoformable polyester-containing laminate | |
| CA2140978C (en) | Thermoplastic multilayer ethylene polymer sheet for containment of odoriferous product components | |
| EP2765092B1 (en) | Multi-compartment tray-less package with a rigid frame | |
| JPH08253262A (en) | Package using shrink film lid stock | |
| CN110475722B (en) | Film having retort shock recovery | |
| GB2592482A (en) | Oven skin packaging film | |
| EP1871597B1 (en) | Microwaveable film or sheet suitable for vacuum skin packaging applications and peelable microwaveable vacuum skin package obtained therewith | |
| JP2920458B2 (en) | Coextrusion composite film for deep drawing | |
| JP3051614B2 (en) | Co-extruded composite film for deep drawing | |
| EP0967073A3 (en) | Biaxially stretched multilayer film | |
| JPH06238847A (en) | Co-extruded composite film | |
| JPH06226930A (en) | Co-extrusion molded composite film for deep drawing | |
| JP2003145699A (en) | Coextrusion composite film for deep draw packaging, and deep draw package | |
| JPH07112520A (en) | Coextruded composite film for deep drawing | |
| JPH07256836A (en) | Composite film for retort and deep-draw package | |
| JP2985951B2 (en) | Flexible multilayer film | |
| JP2000264331A (en) | Composite tray container | |
| JP3325360B2 (en) | Coextrusion composite film for deep drawing | |
| JP2736093B2 (en) | Vacuum package of raw meat | |
| JP3037549B2 (en) | Multilayer film | |
| JP2000296587A (en) | Laminate and sealed vessel | |
| JPH1076616A (en) | Co-extruded composite film | |
| JP2003276125A (en) | Composite film for packaging food |