JPS6364290B2 - - Google Patents
Info
- Publication number
- JPS6364290B2 JPS6364290B2 JP56020162A JP2016281A JPS6364290B2 JP S6364290 B2 JPS6364290 B2 JP S6364290B2 JP 56020162 A JP56020162 A JP 56020162A JP 2016281 A JP2016281 A JP 2016281A JP S6364290 B2 JPS6364290 B2 JP S6364290B2
- Authority
- JP
- Japan
- Prior art keywords
- foamed resin
- resin layer
- tube
- plastic film
- stretched
- 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
- 229920005989 resin Polymers 0.000 claims description 68
- 239000011347 resin Substances 0.000 claims description 68
- 229920000554 ionomer Polymers 0.000 claims description 18
- 239000002985 plastic film Substances 0.000 claims description 14
- 229920006255 plastic film Polymers 0.000 claims description 14
- 239000011342 resin composition Substances 0.000 claims description 14
- 229920005992 thermoplastic resin Polymers 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000004604 Blowing Agent Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 239000004088 foaming agent Substances 0.000 claims description 5
- 229910021645 metal ion Inorganic materials 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- 239000012809 cooling fluid Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000005187 foaming Methods 0.000 claims description 2
- 239000010408 film Substances 0.000 description 31
- 238000004806 packaging method and process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 239000004744 fabric Substances 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000004156 Azodicarbonamide Substances 0.000 description 2
- 229920006257 Heat-shrinkable film Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 2
- 235000019399 azodicarbonamide Nutrition 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- CZGWDPMDAIPURF-UHFFFAOYSA-N (4,6-dihydrazinyl-1,3,5-triazin-2-yl)hydrazine Chemical compound NNC1=NC(NN)=NC(NN)=N1 CZGWDPMDAIPURF-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- VRFNYSYURHAPFL-UHFFFAOYSA-N [(4-methylphenyl)sulfonylamino]urea Chemical compound CC1=CC=C(S(=O)(=O)NNC(N)=O)C=C1 VRFNYSYURHAPFL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/22—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length consisting of at least two parts of chemically or physically different materials, e.g. having different densities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Molding Of Porous Articles (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
本発明は絹のような光沢のある風合を有する延
伸プラスチツクフイルム及びその製造方法に関す
る。更に詳しくは配向した微細な繊維構造に起因
する絹のような光沢のある風合を有する熱収縮性
延伸配向プラスチツクフイルムを共押出インフレ
ーシヨン法で製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stretched plastic film having a silky, glossy texture and a method for producing the same. More specifically, the present invention relates to a method for producing a heat-shrinkable stretch-oriented plastic film having a silk-like glossy texture due to an oriented fine fiber structure by a coextrusion inflation method.
近年、プラスチツク二軸延伸フイルムの製造技
術の発展に伴つて、熱収縮性フイルムが集積シユ
リンク包装及び個別シユリンク包装用として広く
普及してきた。シユリンク包装では、ポリエチレ
ン、ポリプロピレン等のチユーブ状のインフレー
シヨンフイルムが広く使われており、これらのチ
ユーブ状フイルムの中へ被包装物を入れ、赤外加
熱トンネルを通して被包装物をぴつたりと収縮包
装することが出来る。従来のシユリンク包装用フ
イルムは強靭で透明性が良いという長所を有する
が、緩衝性及び落着いた風合に欠けるという短所
があつた。 In recent years, with the development of manufacturing technology for plastic biaxially stretched films, heat-shrinkable films have become widely used for integrated shrink packaging and individual shrink packaging. In Shrink packaging, tube-shaped inflation films made of polyethylene, polypropylene, etc. are widely used. The packaged items are placed inside these tube-shaped films, and the packaged items are tightly shrunk through an infrared heating tunnel. Can be packaged. Conventional Shrink packaging films have the advantages of being strong and transparent, but have the disadvantages of lacking cushioning properties and a calm texture.
緩衝性包装材料として発泡スチロールシート、
発泡ポリエチレンシート等が開発されており、適
度のクツシヨン性を発泡体に保持させることによ
つて耐衝撃性の必要な商品の包装に広く採用され
ている。然し乍ら、これらの発泡シートは、厚く
て不透明である為、包装体が嵩張る、被包装物品
が殆んど見えない、熱収縮性が小さくシユリンク
包装に適さない等の短所がある。 Styrofoam sheets as cushioning packaging materials,
Foamed polyethylene sheets and the like have been developed, and are widely used for packaging products that require impact resistance by allowing the foam to maintain appropriate cushioning properties. However, since these foam sheets are thick and opaque, they have disadvantages, such as bulky packaging, hardly visible goods to be packaged, and low heat shrinkability, making them unsuitable for shrink packaging.
その他、最近、紙に近い風合を有する包装材料
として不織布が開発され、広く使用されている
が、密閉性が不十分、熱収縮しない等の欠点があ
る。 In addition, non-woven fabrics have recently been developed as packaging materials with a texture similar to paper and are widely used, but they have drawbacks such as insufficient sealing properties and non-shrinkability due to heat.
本発明者らは、このような現状に鑑み、絹のよ
うな優雅な風合を有し、熱収縮性があつて、しか
も、適度の気密性あるいは通気性を有し、かつ、
透視性のある熱収縮性フイルムを得んとして種々
研究の結果、アイオノマー樹脂と発泡剤とを混合
した樹脂組成物を発泡性樹脂層の主成分とし、ア
イオノマー樹脂を非発泡性樹脂層とし、これらの
二軸の共押出インフレーシヨン法によつて絹織物
に近い光沢と風合を有するフイルムを製造できる
ことを見出し、更に詳細な研究を進めて本発明を
完成させるに至つたものである。 In view of the current situation, the present inventors have developed a material that has an elegant silk-like texture, is heat-shrinkable, has appropriate airtightness or breathability, and
As a result of various studies in an attempt to obtain a see-through heat-shrinkable film, a resin composition containing an ionomer resin and a foaming agent was used as the main component of the foamable resin layer, and an ionomer resin was used as the non-foamable resin layer. The inventors discovered that it was possible to produce a film with a gloss and texture similar to those of silk fabric using the twin-screw coextrusion inflation method, and conducted further detailed research to complete the present invention.
本発明の第一の目的は、シール包装、ピロー包
装、シユリンク包装等に適した絹織物のような光
沢のある風合を有するプラスチツクフイルムを提
供することにある。 A first object of the present invention is to provide a plastic film having a glossy texture similar to silk fabric and suitable for seal packaging, pillow packaging, shrink packaging, etc.
本発明の第二の目的は、紙と従来のプラスチツ
クフイルムとの中間程度の通気性を有する微孔性
フイルムを提供することにある。 A second object of the present invention is to provide a microporous film having air permeability intermediate between that of paper and conventional plastic film.
本発明の延伸プラスチツクフイルムは、発泡樹
脂層と非発泡樹脂層との少なくとも二層から成る
延伸フイルムであり、非発泡樹脂層は熱可塑性樹
脂を主成分とする樹脂組成物から成り、発泡樹脂
層はエチレンとメタアクリル酸との共重合体に金
属イオンを作用させたアイオノマー樹脂100重量
部に対して、発泡剤0.2乃至10重量部を添加した
樹脂組成物を主成分とし、該発泡樹脂層は最外層
にあつて、配向した繊維構造に起因する絹のよう
な光沢のある風合を形成していることを特徴とし
ている。 The stretched plastic film of the present invention is a stretched film consisting of at least two layers, a foamed resin layer and a non-foamed resin layer, where the non-foamed resin layer is made of a resin composition containing a thermoplastic resin as a main component, and the foamed resin layer The main component is a resin composition in which 0.2 to 10 parts by weight of a blowing agent is added to 100 parts by weight of an ionomer resin made of a copolymer of ethylene and methacrylic acid treated with metal ions, and the foamed resin layer is The outermost layer is characterized by a silky, glossy texture due to the oriented fiber structure.
本発明の延伸プラスチツクフイルムの製造方法
は、発泡剤を添加した熱可塑性樹脂を主成分とす
る発泡樹脂層と発泡剤を添加しない熱可塑性樹脂
を主成分とする非発泡樹脂層とから成る延伸プラ
スチツクフイルムの製造方法において、アイオノ
マー樹脂100重量部に対して発泡剤0.2乃至10重量
部を添加した発泡樹脂組成物と熱可塑性樹脂を主
成分とする非発泡樹脂組成物とを別々の押出機で
それぞれ混練溶融した後、円筒状共押出ダイの出
口から積層チユーブ状に押出し、次いで該チユー
ブ内外の気圧の差により、該チユーブを幅方向へ
膨張させると共に引取方向へ延伸し、更に該チユ
ーブの表面に冷却流体を吹き付けて該チユーブを
外面から冷却しながら、最終的にブロー比率が２
以上に達するまで該チユーブを膨張させ、同時に
引取比率が５以上に達するまで引取方向へ該チユ
ーブを延伸して後、少なくとも一組の引取ロール
の間隙で該チユーブを圧締して発泡樹脂層の配向
した繊維構造に起因する絹のような光沢のある風
合を形成させることを特徴としている。 The method for producing a stretched plastic film of the present invention includes a stretched plastic film comprising a foamed resin layer mainly composed of a thermoplastic resin to which a foaming agent has been added and a non-foamed resin layer mainly composed of a thermoplastic resin to which no foaming agent has been added. In the film manufacturing method, a foamed resin composition in which 0.2 to 10 parts by weight of a blowing agent is added to 100 parts by weight of an ionomer resin and a non-foamed resin composition containing a thermoplastic resin as a main component are separately extruded. After kneading and melting, it is extruded from the outlet of a cylindrical coextrusion die into a laminated tube shape, and then, due to the difference in air pressure inside and outside the tube, the tube is expanded in the width direction and stretched in the take-up direction. While cooling the tube from the outside by spraying cooling fluid, the final blow ratio is 2.
At the same time, the tube is expanded in the drawing direction until the drawing ratio reaches 5 or more, and then the tube is compressed in the gap between at least one set of drawing rolls to form a foamed resin layer. It is characterized by the formation of a silky, glossy texture due to its oriented fiber structure.
本発明において、発泡樹脂層はアイオノマー樹
脂100重量部に対して発泡剤0.2乃至10重量部を添
加した樹脂組成物を主成分としている。発泡樹脂
層の発泡剤の添加量が0.2重量部以下の場合には
樹脂がアイオノマーであつてもフイルムの風合に
特長がないが、発泡樹脂層のアイオノマー樹脂
100重量部に対して発泡剤0.2乃至10重量部を添加
することによつて絹織物のような光沢のあるユニ
ークな風合を生じる。 In the present invention, the foamed resin layer is mainly composed of a resin composition in which 0.2 to 10 parts by weight of a blowing agent are added to 100 parts by weight of an ionomer resin. If the amount of foaming agent added to the foamed resin layer is 0.2 parts by weight or less, even if the resin is an ionomer, the texture of the film will not have any special characteristics.
By adding 0.2 to 10 parts by weight of a blowing agent per 100 parts by weight, a unique, glossy texture similar to that of silk fabric is produced.
アイオノマー樹脂の種類は特に限定しないが、
エチレンとメタアクリル酸との共重合体に金属イ
オンを作用させた樹脂が特に好ましい。金属イオ
ンとしては亜鉛イオン又はナトリウムイオンが好
ましい。 The type of ionomer resin is not particularly limited, but
Particularly preferred is a resin made of a copolymer of ethylene and methacrylic acid treated with metal ions. As the metal ion, zinc ion or sodium ion is preferred.
発泡剤の種類は特に限定しないが、重炭酸ソー
ダ、アゾジカルボンアミド、Ｐ−トルエンスルホ
ニルセミカルバジド、トリヒドラジノトリアジン
等が好ましい。 The type of blowing agent is not particularly limited, but sodium bicarbonate, azodicarbonamide, P-toluenesulfonyl semicarbazide, trihydrazinotriazine, and the like are preferred.
非発泡樹脂層は熱可塑性樹脂であり、発泡樹脂
層に隣接する層の樹脂はアイオノマー樹脂、低密
度ポリエチレン、高密度ポリエチレン、ポリプロ
ピレン、エチレン−酢酸ビニル共重合体樹脂、１
−２−ポリブタジエン樹脂、ポリエステル樹脂等
が好ましい。高い熱収縮率が要求される用途には
非発泡樹脂層としてアイオノマー樹脂あるいは低
密度ポリエチレンが好ましい。 The non-foamed resin layer is a thermoplastic resin, and the resin in the layer adjacent to the foamed resin layer is an ionomer resin, low density polyethylene, high density polyethylene, polypropylene, ethylene-vinyl acetate copolymer resin, 1
-2-polybutadiene resin, polyester resin, etc. are preferred. For applications requiring a high thermal shrinkage rate, ionomer resin or low density polyethylene is preferred as the non-foamed resin layer.
発泡樹脂層にアイオノマー以外の他の樹脂、例
えば、低密度ポリエチレン、高密度ポリエチレ
ン、ポリアミド、ポリプロピレン等を用いても、
絹織物のような光沢のある風合のフイルムを造る
ことは困難である。例えば、発泡樹脂層としてポ
リプロピレンを用いて本発明の方法と類似した方
法で製造したフイルムでは、目の荒い網目状の構
造がフイルムの発泡面に形成され、本発明のフイ
ルムとは全く異なつた構造、風合になる。 Even if other resins than ionomer are used in the foamed resin layer, such as low density polyethylene, high density polyethylene, polyamide, polypropylene, etc.,
It is difficult to create a film with a glossy texture like silk fabric. For example, in a film manufactured by a method similar to the method of the present invention using polypropylene as a foamed resin layer, a coarse mesh structure is formed on the foamed surface of the film, which is a completely different structure from the film of the present invention. , becomes the texture.
従つて、本発明のフイルムの絹のような光沢の
ある風合は、発泡アイオノマー樹脂層の配向した
微細な繊維構造に由来する独特のものであり、本
発明の製造方法で初めて造ることが出来たもので
ある。 Therefore, the silky, glossy texture of the film of the present invention is unique and is derived from the oriented fine fiber structure of the foamed ionomer resin layer, and can be produced for the first time by the production method of the present invention. It is something that
発泡樹脂組成物と非発泡樹脂組成物とをそれぞ
れ別々の押出機で加熱混練し、溶融した後、円筒
状共押出ダイで発泡樹脂層と非発泡樹脂層とを溶
融接着し乍ら、押出ダイの出口から積層チユーブ
状に押出す。発泡樹脂層と非発泡樹脂とがダイ内
で十分強固に溶融接着することにより、積層チユ
ーブのブロー延伸の際、発泡樹脂層が非発泡樹脂
層と一体となつて延伸され、配向した微細な繊維
構造が形成されるものと考えられる。 The foamed resin composition and the non-foamed resin composition are heat-kneaded and melted using separate extruders, and then the foamed resin layer and the non-foamed resin layer are melted and bonded using a cylindrical co-extrusion die. It is extruded from the outlet into a laminated tube shape. By melting and adhering the foamed resin layer and the non-foamed resin sufficiently firmly in the die, the foamed resin layer and the non-foamed resin layer are stretched together with the non-foamed resin layer during blow stretching of the laminated tube, resulting in oriented fine fibers. It is thought that a structure is formed.
積層チユーブは、引取方向へ延伸し乍ら、内外
の気圧の差により、幅方向へも膨張させる。更に
チユーブの表面に冷却流体を吹き付けてチユーブ
を外面から冷却し乍ら、最終的にブロー比率が２
以上に達するまで該チユーブを膨張させ、同時に
引取比率が５以上に達するまで引取方向へ延伸す
る。ブロー比率とは膨張したチユーブ状フイルム
の直径と円筒状ダイスの出口、即ちリツプの直径
との比であり、引取比率は引取ロールの間隙を通
過するチユーブ状フイルムの通過速度と円筒状ダ
イスの出口を通過するチユーブ状溶融樹脂の通過
速度との比で定義される。 While the laminated tube is stretched in the take-up direction, it is also expanded in the width direction due to the difference in air pressure between the inside and outside. Furthermore, cooling fluid is sprayed onto the surface of the tube to cool the tube from the outside, and the final blow ratio is 2.
The tube is inflated until it reaches a ratio of 5 or more, and at the same time, it is stretched in the drawing direction until a drawing ratio of 5 or more is reached. The blowing ratio is the ratio between the diameter of the expanded tubular film and the diameter of the exit of the cylindrical die, that is, the diameter of the lip, and the take-up ratio is the ratio between the passing speed of the tubular film through the gap between the take-up rolls and the exit of the cylindrical die. It is defined as the ratio to the passage speed of the tube-shaped molten resin passing through the tube.
フイルムに絹織物のような光茶のある風合を形
成させ、しかも高い熱収縮性を付与させる為に
は、最終的に引取比率を５倍以上、好ましくは、
10倍乃至20倍にする。このように引取比率を著し
く高くすることによつて、非発泡樹脂層の薄いフ
イルムの表面に発泡樹脂層の高度に一軸配向した
微細な繊維組織が密に付着した構造になり、シル
キーな光沢のある風合が形成される。 In order to form a light brown texture like silk fabric on the film and give it high heat shrinkability, the final take-up ratio should be 5 times or more, preferably,
Increase it by 10 to 20 times. By significantly increasing the take-up ratio in this way, a structure is created in which the highly uniaxially oriented fine fiber structure of the foamed resin layer is densely attached to the surface of the thin film of the non-foamed resin layer, resulting in a silky, glossy finish. A certain texture is formed.
本発明のフイルムの厚さは20μ乃至200μである
ことが好ましい。フイルム厚さは、アンビル及び
スピンドルの測定面が直径６mmの円形であるマイ
クロメーターによつて測つた値である。厚さが
20μ以下では、引張強度が小さくて取扱いにく
く、200μ以上の厚さのフイルムでは、シルキー
な感触が少なくなる。厚さ60μ程度のフイルムは
丈夫で、風合、手触りも良く、フイルムの引取方
向に沿つて引裂性が良好である。 The thickness of the film of the present invention is preferably 20μ to 200μ. The film thickness is the value measured using a micrometer whose anvil and spindle measurement surfaces are circular with a diameter of 6 mm. Thickness
Films with a thickness of 20μ or less have a low tensile strength and are difficult to handle, and films with a thickness of 200μ or more have a less silky feel. A film with a thickness of about 60 μm is strong, has a good texture and feel, and has good tearability along the direction of film take-up.
発泡樹脂層の厚さに対する非発泡樹脂層の厚さ
の割合は特に限定しないが、非発泡樹脂層の厚さ
を薄くすると、次第に微孔性を生じてくる。非発
泡樹脂層の厚さが5μ以下の微孔性フイルムを本
発明の方法で製造する場合、インフレバブルの内
圧の低下を防止する為、常にバブル内部にエアを
供給するのが好ましい。このような方法によつて
通気性の良好な微孔性フイルムの製造が可能であ
る。 Although the ratio of the thickness of the non-foamed resin layer to the thickness of the foamed resin layer is not particularly limited, as the thickness of the non-foamed resin layer is made thinner, microporosity gradually occurs. When producing a microporous film with a non-foamed resin layer having a thickness of 5 μm or less by the method of the present invention, it is preferable to always supply air to the inside of the bubble in order to prevent a drop in the internal pressure of the inflation bubble. By such a method, it is possible to produce a microporous film with good air permeability.
シルキーな風合のフイルムを得る為には、発泡
樹脂層を最外層にする必要がある。但し、本発明
のフイルムは非発泡樹脂層と発泡樹脂層との二層
構成に限定するものではなく、表裏とも発泡樹脂
層とし、中間に非発泡樹脂層を持つてくることに
よつてフイルムの風合を更に絹のような光沢のあ
る風合に近づけることが出来る。 In order to obtain a film with a silky texture, the foamed resin layer must be the outermost layer. However, the film of the present invention is not limited to a two-layer structure consisting of a non-foamed resin layer and a foamed resin layer.By having a foamed resin layer on both the front and back sides and a non-foamed resin layer in the middle, the film can be The texture can be brought closer to a silky, glossy texture.
以下に実施例を示す。 Examples are shown below.
実施例 １
アイオノマー樹脂（三井ポリケミカル株式会社
製ハイミラン1707）100重量部に対してアゾジカ
ルボンアミド（大塚化学薬品株式会社製ユニフオ
ームAZ−Ｌ）１重量部を添加した発泡樹脂組成
物とアイオノマー樹脂（三井ポリケミカル株式会
社製ハイミラン1707）から成る非発泡性樹脂組成
物とをそれぞれ別々の40mmφ押出機で混練溶融し
た後、ダイリツプの直径50mmの円筒状二層共押出
ダイから内層が発泡樹脂層、外層が非発泡樹脂層
の積層チユーブを10Kg／hrの吐出速度で押出し、
空冷インフレーシヨン法により、10ｍ／分の引取
速度で折径250mm、厚さ60μのフイルムを製造し
た。フイルムのブロー比率は３、引取比率は10に
設定した。Example 1 A foamed resin composition in which 1 part by weight of azodicarbonamide (Uniform AZ-L, manufactured by Otsuka Chemical Co., Ltd.) was added to 100 parts by weight of ionomer resin (Himilan 1707, manufactured by Mitsui Polychemicals Co., Ltd.) and an ionomer resin ( After kneading and melting a non-foaming resin composition consisting of Himilan 1707 (manufactured by Mitsui Polychemical Co., Ltd.) in separate 40 mmφ extruders, the inner layer is a foamed resin layer, A laminated tube whose outer layer is a non-foamed resin layer is extruded at a discharge rate of 10 kg/hr,
A film with a fold diameter of 250 mm and a thickness of 60 μm was produced by an air-cooled inflation method at a take-up speed of 10 m/min. The blow ratio of the film was set to 3, and the take-off ratio was set to 10.
製造したフイルムは、引取方向に強く配向した
微細な繊維組織に起因する絹織物のような光沢の
ある風合を有しており、軽くて、引取方向に沿つ
て引裂性が良好である。本フイルムはヒートシー
ル性に優れており、ピロー包装、シール包装、シ
ユリンク包装のいずれにも適している。 The produced film has a glossy texture similar to that of silk fabric due to the fine fiber structure strongly oriented in the drawing direction, is light, and has good tearability along the drawing direction. This film has excellent heat sealability and is suitable for pillow packaging, seal packaging, and shrink packaging.
Claims (1)
層からなる延伸配向プラスチツクフイルムであ
り、非発泡樹脂層が熱可塑性樹脂を主成分とする
樹脂組成物から成り、発泡樹脂層がアイオノマー
樹脂に対して発泡剤を加えて発泡させ乍ら延伸配
向させた樹脂組成物から成り、該発泡樹脂層は最
外層にあつて、配向した繊維構造に起因する絹の
ような光沢のある風合を形成していることを特徴
とする延伸プラスチツクフイルム。 ２ 非発泡樹脂層の熱可塑性樹脂がアイオノマー
樹脂である特許請求の範囲第１項記載の延伸プラ
スチツクフイルム。 ３ 発泡樹脂層がエチレンとメタアクリル酸との
共重合体に金属イオンを作用させたアイオノマー
樹脂である特許請求の範囲第１項記載の延伸プラ
スチツクフイルム。 ４ 発泡剤を添加した熱可塑性樹脂を主成分とす
る発泡樹脂層と発泡剤を添加しない熱可塑性樹脂
を主成分とする非発泡樹脂層とから成る延伸プラ
スチツクフイルムの製造方法において、100重量
部のアイオノマー樹脂に対して0.2乃至10重量部
の発泡剤を添加した発泡樹脂組成物と熱可塑性樹
脂を主成分とする非発泡樹脂組成物とを別々の押
出機でそれぞれ混練溶融した後、円筒状共押出ダ
イの出口から積層チユーブ状に押出し、次いで該
チユーブ内外の気圧の差により該チユーブを幅方
向へ膨張させると共に引取方向へ延伸し、更に該
チユーブの表面に冷却流体を吹き付けて該チユー
ブを外面から冷却し乍ら、最終的にブロー比率が
２以上に達するまで該チユーブを膨張させ、同時
に引取比率が５以上に達するまで引取方向へ該チ
ユーブを延伸して後、少なくとも一組の引取ロー
ルの間隙で該チユーブを圧締して発泡樹脂層に配
向した繊維構造を生ぜしめ、絹のような光沢のあ
る風合を形成させることを特徴とする延伸プラス
チツクフイルムの製造方法。 ５ アイオノマー樹脂がエチレンとメタアクリル
酸との共重合体に金属イオンを作用させた樹脂で
ある特許請求の範囲第４項記載の延伸プラスチツ
クフイルムの製造方法。[Scope of Claims] 1. A stretched oriented plastic film consisting of at least two layers, a foamed resin layer and a non-foamed resin layer, where the non-foamed resin layer is made of a resin composition containing a thermoplastic resin as a main component, The layer is made of a resin composition obtained by adding a foaming agent to an ionomer resin, foaming it, and then stretching and orienting it. A stretched plastic film characterized by forming a certain texture. 2. The stretched plastic film according to claim 1, wherein the thermoplastic resin of the non-foamed resin layer is an ionomer resin. 3. The stretched plastic film according to claim 1, wherein the foamed resin layer is an ionomer resin made of a copolymer of ethylene and methacrylic acid treated with metal ions. 4. In a method for producing a stretched plastic film consisting of a foamed resin layer containing a thermoplastic resin as a main component to which a blowing agent has been added and a non-foamed resin layer containing a thermoplastic resin as a main component to which no blowing agent has been added, 100 parts by weight of A foamed resin composition containing 0.2 to 10 parts by weight of a blowing agent based on the ionomer resin and a non-foamed resin composition containing a thermoplastic resin as a main component are kneaded and melted in separate extruders, and then molded into a cylindrical shape. A laminated tube is extruded from the exit of the extrusion die, and then the tube is expanded in the width direction due to the difference in air pressure between the inside and outside of the tube and stretched in the take-up direction. Cooling fluid is then sprayed onto the surface of the tube to make the tube outer surface. While cooling the tube, the tube is expanded until the blow ratio finally reaches 2 or more, and at the same time, the tube is stretched in the drawing direction until the take-up ratio reaches 5 or more, and then at least one set of take-up rolls is expanded. A method for producing a stretched plastic film, characterized in that the tubes are compressed in the gaps to produce an oriented fiber structure in the foamed resin layer, thereby forming a glossy silk-like texture. 5. The method for producing a stretched plastic film according to claim 4, wherein the ionomer resin is a resin obtained by treating a copolymer of ethylene and methacrylic acid with metal ions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56020162A JPS57135121A (en) | 1981-02-16 | 1981-02-16 | Manufacture of oriented plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56020162A JPS57135121A (en) | 1981-02-16 | 1981-02-16 | Manufacture of oriented plastic film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57135121A JPS57135121A (en) | 1982-08-20 |
| JPS6364290B2 true JPS6364290B2 (en) | 1988-12-12 |
Family
ID=12019456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56020162A Granted JPS57135121A (en) | 1981-02-16 | 1981-02-16 | Manufacture of oriented plastic film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57135121A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS591540A (en) * | 1982-06-25 | 1984-01-06 | Gunze Ltd | Heat-shrinkable expanded film |
| JPS5989127A (en) * | 1982-11-12 | 1984-05-23 | Sekisui Plastics Co Ltd | Manufacture of foamed sheet |
| JPH03275462A (en) * | 1990-03-16 | 1991-12-06 | Shinji Ito | Transport case for fresh food, etc. |
| CA2241609C (en) * | 1997-06-26 | 2009-08-25 | Southpac Trust International, Inc. | Polymeric material having a cloth-like appearance |
| DE19849263C2 (en) * | 1998-10-26 | 2003-06-12 | Moeller Plast Gmbh | Process for producing a component by coextrusion |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49115165A (en) * | 1973-03-09 | 1974-11-02 | ||
| JPS51130476A (en) * | 1975-04-28 | 1976-11-12 | Wiik & Hoeglund | Method of producing nonnslip plastic film |
| JPS635262A (en) * | 1986-06-25 | 1988-01-11 | Sumitomo Chem Co Ltd | Quantitative analysis of dibutyl hydrogenphosphate and monobutyl dihydrogenphosphate in nuclear fuel re-treatment solvent |
-
1981
- 1981-02-16 JP JP56020162A patent/JPS57135121A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49115165A (en) * | 1973-03-09 | 1974-11-02 | ||
| JPS51130476A (en) * | 1975-04-28 | 1976-11-12 | Wiik & Hoeglund | Method of producing nonnslip plastic film |
| JPS635262A (en) * | 1986-06-25 | 1988-01-11 | Sumitomo Chem Co Ltd | Quantitative analysis of dibutyl hydrogenphosphate and monobutyl dihydrogenphosphate in nuclear fuel re-treatment solvent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57135121A (en) | 1982-08-20 |
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