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    • 26. 发明申请
    • Polylactic acid resin composition, process for producing the same, biaxially stretched polylactic acid film, and molded articles thereof
    • 聚乳酸树脂组合物,其制造方法,双轴拉伸聚乳酸薄膜及其成型体
    • US20070032577A1
    • 2007-02-08
    • US10550666
    • 2004-02-10
    • Takeshi KanzawaSadayuki KobayashiMinoru YoshidaFumie SakidaJiro Kumaki
    • Takeshi KanzawaSadayuki KobayashiMinoru YoshidaFumie SakidaJiro Kumaki
    • C09D101/18
    • C08L67/04C08J5/18C08J2367/04C08L1/10C08L25/18C08L33/08C08L33/10C08L2666/26C08L2666/06C08L2666/04
    • The invention provides a resin composition containing poly(lactic acid) and a cellulosic ester, which are biomass type materials; a resin composition excellent in transparency, mechanical properties, and thermostability; a biaxially drawn film containing poly(lactic acid) and at least one compound selected from cellulosic esters, poly(meth)acrylates, and polyvinyl compounds having a glass transition temperature of 60° C. or higher; and a biaxially drawn film excellent in transparency, mechanical properties, and thermostability. The aims of the invention can be achieved by a resin composition obtained by melt-kneading a poly(lactic acid) polymer with a weight average molecular weight of 50,000 or higher and a cellulosic ester; a resin composition excellent in transparency and having luminous transmittance of 40% or higher for visible light with 400 nm; its production method; a molded article and a film made of the resin composition; a poly(lactic acid) biaxially drawn film containing a poly(lactic acid) polymer with a weight average molecular weight of 50,000 or higher and at least one compound selected from cellulosic esters, poly(meth)acrylates, and polyvinyl compounds having a glass transition temperature of 60° C. or higher; a poly(lactic acid) biaxially drawn film excellent in transparency and having film haze of 10% or lower; and a molded article made of the film.
    • 本发明提供含有聚(乳酸)和纤维素酯的树脂组合物,其为生物质型材料; 透明性,机械性能和热稳定性优异的树脂组合物; 含有聚(乳酸)和至少一种选自纤维素酯,聚(甲基)丙烯酸酯和玻璃化转变温度为60℃以上的聚乙烯基化合物的化合物的双轴拉伸膜; 以及透明性,机械性能和热稳定性优异的双轴拉伸膜。 本发明的目的可以通过将重均分子量为50,000以上的聚(乳酸)聚合物和纤维素酯熔融捏合得到的树脂组合物实现, 对于400nm的可见光,透明性优异,透光率为40%以上的树脂组合物; 其生产方式; 模塑制品和由该树脂组合物制成的薄膜; 含有重均分子量为50,000以上的聚(乳酸)聚合物的聚(乳酸)双轴拉伸膜和至少一种选自纤维素酯,聚(甲基)丙烯酸酯和具有玻璃化转变的聚乙烯基化合物的化合物 温度为60℃以上; 具有透明性优异且膜雾度为10%以下的聚(乳酸)双轴拉伸膜; 和由该膜制成的模制品。