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    • 8. 发明申请
    • STERILISABLE AND TOUGH IMPACT POLYPROPYLENE COMPOSITION
    • 不可渗透和韧性影响聚丙烯组合物
    • WO2009019277A1
    • 2009-02-12
    • PCT/EP2008/060306
    • 2008-08-06
    • BOREALIS TECHNOLOGY OYGREIN, ChristelleSCHEDENIG, Tonja
    • GREIN, ChristelleSCHEDENIG, Tonja
    • C08L23/08C08L23/10C08L23/12C08L23/14C08L23/16C08J5/18
    • C08L23/142C08J5/18C08J2323/10C08L23/0815C08L23/10C08L23/12C08L23/16C08L2666/06
    • The present invention relates to a heterophasic polypropylene composition which is sterilisable and has a high impact strength as well as improved optical properties both before and after a step of heat sterilisation. Furthermore, the present invention relates to a film comprising said heterophasic polypropylene composition, and to the use of said composition for the production of a film. Finally, the present invention is directed to the use of such a film as a packaging material for medicals and/or food. The heterophasic polypropylene composition comprises a matrix resin which comprises (A) a propylene homopolymer and (B) a propylene random copolymer; and a dispersed phase which comprises (C) an ethylene-propylene rubber wherein (i) the melting point of the heterophasic polypropylene composition is at least 145°C and (ii) the content of comonomer in the matrix resin is at least 0.5 wt% based on the entire matrix resin without any additives.
    • 本发明涉及一种多相聚丙烯组合物,其在加热灭菌步骤之前和之后都是可灭菌的并且具有高冲击强度以及改善的光学性能。 此外,本发明涉及包含所述多相聚丙烯组合物的膜以及所述组合物用于制备膜的用途。 最后,本发明涉及使用这种薄膜作为医疗和/或食品的包装材料。 多相聚丙烯组合物包含基质树脂,其包含(A)丙烯均聚物和(B)丙烯无规共聚物; 和分散相,其包含(C)乙烯 - 丙烯橡胶,其中(i)多相聚丙烯组合物的熔点为至少145℃,和(ii)基体树脂中共聚单体的含量为至少0.5重量% 基于没有任何添加剂的整个基体树脂。