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    • 9. 发明授权
    • Breathable, hydrolyzable porous film
    • 透气,可水解多孔膜
    • US5340646A
    • 1994-08-23
    • US871651
    • 1992-04-21
    • Kenji MoritaKohichi UchikiHosei Shinoda
    • Kenji MoritaKohichi UchikiHosei Shinoda
    • C08J5/18B32B3/06C08G63/08
    • C08J5/18C08J2367/04Y10S428/91Y10T428/249956Y10T428/25Y10T428/258
    • A breathable, hydrolyzable, porous film which is obtained by the process comprising adding from 40 to 250 parts by weight of a finely-powdered filler having an average particle size of from 0.3 to 4 .mu.m to 100 parts by weight of a polylactic acid-based resin composition comprising from 80 to 100% by weight of polylactic acid or a lactic acid-hydroxycarboxylic acid copolymer and from 0 to 20% by weight of a plasticizer, melting and film-forming the resultant mixture, and successively stretching the thus-obtained film 1.1 times or more at least in the direction of the axis; and which is consequently useful as a material for leakproof films of sanitary materials such as a paper diaper and packaging materials, and does not accumulate as wastes because of hydrolyzability in the natural environment in the case of being abandoned after use.
    • 一种透气的,可水解的多孔膜,其通过该方法获得,包括将40至250重量份的平均粒度为0.3至4μm的细粉末填料加入到100重量份的聚乳酸 - 包含80-100重量%的聚乳酸或乳酸 - 羟基羧酸共聚物和0-20重量%的增塑剂,熔融和成膜所得混合物,并依次拉伸由此获得的 至少在轴的方向上为1.1倍以上的膜; 因此可用作纸尿布和包装材料等卫生材料的防漏膜的材料,并且由于在使用后放弃的情况下由于自然环境中的水解性而不会作为废物积聚。