JPS6025263B2 - Manufacturing method of laminated film - Google Patents
Manufacturing method of laminated filmInfo
- Publication number
- JPS6025263B2 JPS6025263B2 JP52046004A JP4600477A JPS6025263B2 JP S6025263 B2 JPS6025263 B2 JP S6025263B2 JP 52046004 A JP52046004 A JP 52046004A JP 4600477 A JP4600477 A JP 4600477A JP S6025263 B2 JPS6025263 B2 JP S6025263B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- laminated film
- resin
- web
- laminated
- 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.)
- Expired
Links
Landscapes
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
【発明の詳細な説明】
本発明は、熱可塑性合成樹脂からなる積層フィルムおよ
びその製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminated film made of a thermoplastic synthetic resin and a method for producing the same.
さらに詳しくは適度なヒートシール強度、ピーラブル性
をもつ層を有する積層フィルムおよびその製造方法に関
するものである。従釆から積層フィルム製造方法として
は、各種接着剤を用いそれぞれのフィルムを貼り合わせ
るドライラミネーション法、各種樹脂を刻々の押出機で
溶融させ、ダィ内またはアダプター部で積層化し押出す
共押出し法等があり、異種樹脂の組み合せから、いろい
ろな性質をもたせることができるので、包装材料として
広く使用されている。しかしながら、ドライラミネーシ
ョン法による積層フィルムは、あらかじめフィルム化し
、それを積層するものであり、フィルム化と積層化とが
別工程のため、材料の無駄、価格が高いものとなってし
まった。また貼り合わせの際用いる接着剤の選択が難し
いし、接着剤中の残留臭気の問題が発生するなどの欠点
を有していた。また共押出し法による積層フィルムは、
ドライラミネーション法の欠点を解消した積層方法であ
るが、積層する樹脂のの溶融温度や溶融粘度の異なった
樹脂や高分子量でメルトィンデックスの小さな樹脂を使
用することができなかった。More specifically, the present invention relates to a laminated film having a layer having appropriate heat-sealing strength and peelability, and a method for producing the same. The following methods for producing laminated films include the dry lamination method, in which each film is pasted together using various adhesives, and the coextrusion method, in which various resins are melted in a continuous extruder, laminated in a die or in an adapter section, and then extruded. It is widely used as a packaging material because it can have various properties by combining different types of resins. However, the laminated film produced by the dry lamination method is made into a film in advance and then laminated, and the film formation and lamination are separate processes, resulting in wasted materials and high prices. In addition, it is difficult to select the adhesive used for bonding, and there is a problem of residual odor in the adhesive. In addition, laminated films made by coextrusion method are
Although this is a lamination method that overcomes the drawbacks of the dry lamination method, it is not possible to use resins with different melt temperatures and melt viscosities, or resins with high molecular weights and small melt indexes.
またこのように溶融押出し積層化した場合、溶融押出し
の際発生する配向性や歪のため良質の積層フィルムを得
ることはできなかった。Furthermore, when laminated by melt extrusion in this manner, it was not possible to obtain a high quality laminated film due to the orientation and distortion generated during melt extrusion.
さらにこれらの方法によって得られる積層フィルムでは
、適度なヒートシール強度、ピーラブル性をもつ層を含
ませることはできなかった。Furthermore, the laminated films obtained by these methods cannot contain a layer having appropriate heat-sealing strength and peelability.
これらの特性を持たせるためには、それぞれの特性を金
つ樹脂の選択、樹脂の組合せをしたり、ラミネーション
の際の接着剤の選択が、非常に困難であつた。本発明の
目的は、これら従釆の欠点を解消し、積層フィルムに適
度なヒートシール強度またはピーラブル性を有する層を
有する積層フィルムおよびその製造方法を得ることであ
る。In order to provide these properties, it has been extremely difficult to select resins and combinations of resins that have the respective properties, and to select adhesives for lamination. An object of the present invention is to eliminate these conventional drawbacks and provide a laminated film having a layer having appropriate heat seal strength or peelability, and a method for producing the same.
他の目的は、配向性および成形時に発生する歪のない積
層フィルムおよびその製造方法を得ることにある。Another object of the present invention is to obtain a laminated film free from orientation and distortion occurring during molding, and a method for producing the same.
本発明は、第１図に示すようにベースフィルム１上に粒
径が５〜４００ムの粉末樹脂を溶融した粉末樹脂層２を
設けた２層以上の積層フィルムである。The present invention is a laminated film having two or more layers, as shown in FIG. 1, in which a powder resin layer 2 formed by melting a powder resin having a particle size of 5 to 400 mm is provided on a base film 1.
ここでベースフイルム１としては、ポリエチレン、ポリ
プロピレン、エチレン−酢酸ビニル共重合体、アイオノ
マ一樹脂フィルム、また粉末樹脂は、ポリエチレン、ア
ィオノマー樹脂、ナイロン一１１、ナイロン−１２、ポ
リスチレン等粉末化できる熱可塑樹脂であれば用いられ
る。Here, the base film 1 is polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer-resin film, and the powder resin is polyethylene, ionomer resin, nylon-11, nylon-12, polystyrene, etc. Any resin can be used.
この粉末樹脂の粒径は５〜４００山の範囲のものが適当
である。５山以下では、押出し積層する時の熱による空
気の上昇等で粉末の飛散、浮遊の問題がある。The particle size of this powdered resin is suitably in the range of 5 to 400 grains. If the number is less than 5, there is a problem of powder scattering and floating due to air rising due to heat during extrusion and lamination.
また４００〃以上では、ウェブへの押し込みが大きくな
り、また粉末の皮膜化表面の平滑性に欠けてしまつｏ次
に本発明の製造方法は、第２図に示すようにスクリュー
式押出機１４内で溶融混線し、ダイス１３を通してフィ
ルムまたはシート状に押出されたゥェブ１５の表面に積
層化させる粉末樹脂１１をホッパー１２より粉末を均一
に落下させる。In addition, if it exceeds 400, the indentation into the web becomes large and the surface of the powder coated layer lacks smoothness.Next, in the manufacturing method of the present invention, as shown in FIG. Powdered resin 11 is melted and mixed in the hopper 12 and is uniformly dropped from a hopper 12 to be layered on the surface of a web 15 extruded through a die 13 into a film or sheet.
この際自然落下のみでなくスプレーガン、ロールフィル
ター等の方法でも可能である。ウェプブ５は、その軟化
点以上、溶点以下であり、落下した粉末樹脂１１はウェ
プ１５に付着する。次にこれを冷却ロール１６，１７の
間でニツプさせることにより粉末樹脂１１はウェブ１５
にくし、こんだ状態で固着させる。この冷却ロール１７
をウェブ１５が通過する際ウェプ１５側から冷却し、か
つ粉末樹脂１１側から加熱装置１９により加熱して表面
に付着している粉末樹脂１１を溶融して皮膜を形成する
。このように皮膜された粉末樹脂２とゥェブ１５からな
る積層フィルムを冷却ロール１７，１８間でニップさせ
ることにより、粉末を完全に皮膜化して積層フィルム２
０を製造する。冷却ロールは、それぞれ積層する樹脂の
軟化点以下に保ち、かつ回転速度は同じである。次に本
発明の実施例について説明する。In this case, it is possible to use not only natural fall, but also methods such as a spray gun or a roll filter. The temperature of the web 5 is above its softening point and below its melting point, and the fallen resin powder 11 adheres to the web 15. Next, the powdered resin 11 is transferred to the web 15 by nipping it between cooling rolls 16 and 17.
Let it stick in a compacted state. This cooling roll 17
When the web 15 passes through, it is cooled from the web 15 side and heated from the powder resin 11 side by a heating device 19 to melt the powder resin 11 adhering to the surface and form a film. By nipping the laminated film consisting of the powder resin 2 and web 15 coated in this way between the cooling rolls 17 and 18, the powder is completely coated and the laminated film 2 is formed.
Manufacture 0. The cooling rolls are kept at a temperature below the softening point of the resin to be laminated, and their rotational speeds are the same. Next, examples of the present invention will be described.
く実施例〉
（ベースフイルム ポリプロピレン
粉 末 樹 脂 エチレン−酢酸ビニル共重合体（酢酸
ビニル含有量１０モル％）
直径６仇廠スクリュータイプ押出機でポリプロピレンを
を溶融濠練して中５仇岬のフラットダイから厚さ８０山
のポリプロピレンフィルムを押し出す。Examples (Base film Polypropylene powder Resin Ethylene-vinyl acetate copolymer (vinyl acetate content 10 mol%) Polypropylene was melted and kneaded in a screw-type extruder with a diameter of 6 mm. A polypropylene film with a thickness of 80 ridges is extruded from a flat die.
この時のダィリツプ樹脂温度は２３０ｑｏである。該フ
ィルムの表面温度が１８０℃に低下する前に振動落下式
フィーダーからエチレン−酢酸ビニル共重合体粉末を１
雛／めでウェプ上に均一に落下付着させる。このウェブ
を表面温度２ぴ０の金属ロール間でニップして粉末樹脂
をウェプに庄着させる。さらにウェブを下側ロールに巻
きつけて、ウェブ側を冷却しながら、反対側から赤外線
ヒーターを用いて表面の粉末樹脂を溶融させて皮膜化す
る。さらにもう１つの表面温度が２ぴ０の金属製冷却ロ
ールでニツブして、粉末樹脂を完全に皮膜化する。〈比
較例〉
厚さ８０ｒのポリプロピレンフィルム上にトルェン溶媒
エチレン−酢酸ビニル系接着剤を１．舷／〆塗布し、さ
らにこの接着剤面にエチレン酢酸ビニル共重合体（厚さ
１８仏）を押出し、積層フィルムを製造した。The die lip resin temperature at this time was 230 qo. Before the surface temperature of the film decreased to 180°C, 1 mL of ethylene-vinyl acetate copolymer powder was added from a vibrating drop feeder.
Drop and adhere evenly onto the chick/mede web. This web is nipped between metal rolls having a surface temperature of 2.0 mm to coat the powdered resin onto the web. Further, the web is wound around a lower roll, and while the web side is being cooled, an infrared heater is used from the opposite side to melt the powdered resin on the surface to form a film. Furthermore, it is nipped with another metal cooling roll with a surface temperature of 2.0 mm to completely form a film on the powdered resin. <Comparative example> A toluene solvent ethylene-vinyl acetate adhesive was applied on a polypropylene film with a thickness of 80 mm. A laminated film was produced by applying a sheath/bottom coating, and then extruding an ethylene vinyl acetate copolymer (thickness: 18 mm) onto the adhesive surface.
以下実施例、比較例の物性を比較する。The physical properties of Examples and Comparative Examples will be compared below.
※１ ポリプロピレンフィルムに１６０℃１秒間ヒート
シールした場合※２ 赤外線加熱コントロールに変化可
能このように本発明の積層フィルムは残留溶剤のおそれ
がないうえ接着強度、ヒートシール強度のすぐれたもの
である。*1 When heat-sealed to a polypropylene film at 160°C for 1 second *2 Can be changed to infrared heating control As described above, the laminated film of the present invention has no risk of residual solvent and has excellent adhesive strength and heat-sealing strength.
またヒートシール強度は、粉末樹脂を加熱融解する鰭度
に応じて、かえることができる。また粉末樹脂層面に他
の樹脂フィルムをヒートシールし、剥離した場合、界面
剥離でなく、粉末樹脂層内での凝集破壊がおこる。Further, the heat sealing strength can be changed depending on the degree of heating and melting of the powdered resin. Furthermore, when another resin film is heat-sealed onto the powder resin layer surface and peeled off, cohesive failure occurs within the powder resin layer instead of interfacial peeling.
第１図は、本発明の積層フィルムの断面図、第２図は、
本発明の積層フィルムの製造方法を示す説明図である。
１・・・・・・ベースフィルム、２・・…・粉末樹脂層
、１１・・・・・・粉末樹脂、１２・・・・・・ホッパ
ー、１３・…・・ダイ、１４・・・・・・押出機、１５
…・・・ウェブ、１６，１７，１８・・・・・・冷却ロ
ール、１９・・・・・・加熱器、２０．．．．．・積層
フィルム。第１図
第２図FIG. 1 is a sectional view of the laminated film of the present invention, and FIG. 2 is a cross-sectional view of the laminated film of the present invention.
FIG. 2 is an explanatory diagram showing a method for manufacturing a laminated film of the present invention. 1... Base film, 2... Powder resin layer, 11... Powder resin, 12... Hopper, 13... Die, 14... ...Extruder, 15
... Web, 16, 17, 18 ... Cooling roll, 19 ... Heater, 20. ．． ．． ．． ．．・Laminated film. Figure 1 Figure 2
Claims (1)
し、これに冷却ロール間でニツプした後、冷却ロールで
ウエブ側から冷却し、かつ粉末樹脂側から加熱して粉末
樹脂を皮膜化し次に再度冷却ロール間でニツプすること
を特徴とする積層フイルムの製造方法。1. Powdered resin is applied onto a web with a temperature above the softening point and below the melting point, and is nipped between cooling rolls, then cooled from the web side with the cooling rolls, and heated from the powdered resin side to form a film of the powdered resin. A method for producing a laminated film, which comprises nipping the film again between cooling rolls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52046004A JPS6025263B2 (en) | 1977-04-21 | 1977-04-21 | Manufacturing method of laminated film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52046004A JPS6025263B2 (en) | 1977-04-21 | 1977-04-21 | Manufacturing method of laminated film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53130778A JPS53130778A (en) | 1978-11-15 |
| JPS6025263B2 true JPS6025263B2 (en) | 1985-06-17 |
Family
ID=12734916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52046004A Expired JPS6025263B2 (en) | 1977-04-21 | 1977-04-21 | Manufacturing method of laminated film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025263B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6228482A (en) * | 1985-07-24 | 1987-02-06 | Achilles Corp | Production of floor mat |
| JPH0527629Y2 (en) * | 1986-11-07 | 1993-07-14 | ||
| JPH01270966A (en) * | 1988-04-21 | 1989-10-30 | Tadahiro Yuki | A method of scattering powder on the surface of films, a method of collecting or reusing this surplus powder, and a device related thereto |
-
1977
- 1977-04-21 JP JP52046004A patent/JPS6025263B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53130778A (en) | 1978-11-15 |
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