METHOD FOR PRODUCING PROPYLENE MOLDED ARTICLE, SHEET-SHAPED PROPYLENE MOLDED ARTICLE, AND PROPYLENE THERMOFORMED ARTICLE,申请号JP20070179108-传众专利搜索

METHOD FOR PRODUCING PROPYLENE MOLDED ARTICLE, SHEET-SHAPED PROPYLENE MOLDED ARTICLE, AND PROPYLENE THERMOFORMED ARTICLE

申请公布号：JP2009013357(A)

申请号：JP20070179108

申请日期：2007.07.06

申请公布日期：2009.01.22

申请人：

IDEMITSU UNITECH CO LTD

发明人：FUJIWARA KENICHI;ODAKA HIROSHI

分类号：C08J5/00;B29C71/02

主分类号：C08J5/00

摘要：<P>PROBLEM TO BE SOLVED: To provide a propylene molded article having high rigidity, high transparency, and high isotacticity, and to provide a method for producing the same. <P>SOLUTION: The method for producing the propylene molded article comprises flowing a melted polypropylene having stereoregularity of at least 95 mol% isotactic pentad fraction, cooling the melted polypropylene at ≥-200°C and ≤50°C, and keeping for ≥0.1 second and ≤100 seconds, thus obtaining a rapid cooled polypropylene of a highly ordered structure whose main components are mesophase or a monoclinic domain of not more than 100 nm and an amorphous phase, and making heat treatment of the rapid cooled polypropylene of a highly ordered structure by heating at a temperature range showing endothermic transition and not higher than a melting temperature of the polypropylene. <P>COPYRIGHT: (C)2009,JPO&INPIT