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    Laminated ethylenic film for wrapping
    6.
    发明公开
    Laminated ethylenic film for wrapping 失效
    Laminierte Ethylenpolymerfolie zumUmhüllen

    公开(公告)号：EP0580377A1

    公开(公告)日：1994-01-26

    申请号：EP93305628.5

    申请日：1993-07-19

    申请人： SUMITOMO CHEMICAL COMPANY, LIMITED

    发明人： Kume, Takanori ,  Yoshida, Teruaki ,  Yamada, Takeshi ,  Sato, Yufu ,  Hayashida, Haruo ,  Ichige, Akihiro ,  Kotani, Kozo ,  Kawakita, Toshio

    IPC分类号： B32B27/32

    CPC分类号： B32B27/32 ,  B32B27/08 ,  B32B2307/72 ,  Y10S428/91 ,  Y10T428/2826 ,  Y10T428/31855 ,  Y10T428/31913

    摘要： A laminate film for wrapping comprises a layer (A) of an ethylene-α-olefin copolymer having a coefficient of variation of composition distribution (Cx) represented by the equation below of 0.40 or less and having an ethylene content of 50 mol% or more and at least one layer of a different kind; Cx = σ/SCB ave
    wherein σ is a standard deviation of composition distribution (1/1000C), and SCB ave is an average of the number of short chain branchings per 1000C (1/1000C).
    The production of the copolymer is described, and copolymers of ethylene or propylene and an α-olefin or of propylene and ethylene which are suitable as the different kind of layer.
    The film is safe and hygienic, has low odor and excellent in transparency, mechanical strength, softness, and low-temperature heat sealing properties and is therefore suitable to automatic wrapping, particularly stretch-wrapping.

    摘要翻译： 用于包装的层压膜包括乙烯-α-烯烃共聚物层（A），其组成分布变化系数（Cx）由下式表示为0.40以下，乙烯含量为50摩尔％以上 和至少一层不同种类; 其中sigma是组成分布的标准偏差（1/1000℃），SCBave是每1000℃（1/1000℃）的短链分支数的平均值。 描述共聚物的制备，以及乙烯或丙烯与α-烯烃或丙烯和乙烯的共聚物，其适合作为不同种类的层。 该膜是安全卫生的，具有低气味，透明度，机械强度，柔软度和低温热封性能优异，因此适用于自动包装，特别是拉伸包装。

    Method for producing laminated porous polyolefin film and laminated porous polyolefin film
    8.
    发明公开
    Method for producing laminated porous polyolefin film and laminated porous polyolefin film 有权
    Verfahren zur Herstellung einer laminierten，porösenPolyolefinfolie

    公开(公告)号：EP1454742A2

    公开(公告)日：2004-09-08

    申请号：EP04005132.8

    申请日：2004-03-04

    申请人： Sumitomo Chemical Company, Limited

    发明人： Takata, Atsuhiro ,  Kuroda, Ryuma ,  Yamada, Takeshi

    IPC分类号： B32B31/00 ,  B29C55/02

    CPC分类号： B32B38/0032 ,  B29C55/023 ,  B29K2023/00 ,  B32B37/06 ,  B32B37/153 ,  B32B2038/0028 ,  B32B2305/30 ,  B32B2307/724 ,  B32B2309/02 ,  B32B2323/04 ,  Y10T428/24322

    摘要： Disclosed is a method for producing a laminated porous polyolefin film, the method comprising steps of:

    providing a pair of tools for thermocompression bonding two resin films therebetween,
    laminating two films each comprising at least one layer made of a polyolefin resin composition comprising 100 parts by weight of a polyolefin resin having a melt index of 0.1 g/10 min or less and 80 to 300 parts by weight of a filler to form a laminated film by piling and thermocompression bonding the films between the thermocompressing portions of the tools, wherein the surface temperature of each thermocompressing portion is adjusted to a temperature higher than the melting point of the polyolefin resin by from 5 to 25°C during the lamination, and
    drawing the laminated film to form micropores therein, thereby yielding a porous film.

    摘要翻译： 本发明提供一种叠层多孔聚烯烃薄膜的制造方法，其特征在于，包括以下工序：提供一对热压接两片树脂薄膜的工具，将两层薄膜层压成由至少一层由聚烯烃树脂组合物构成的层， 熔体指数为0.1g / 10分钟以下的聚烯烃树脂的重量和填料的80〜300重量份，通过在工具的热压部之间进行热压接和热压接来形成层压膜，其中表面 在层压期间，将各热压部的温度调整为高于聚烯烃树脂的熔点5〜25℃的温度，并且在其中拉伸层叠膜以形成微孔，从而得到多孔膜。