POLYPROPYLENE RESIN MOLDED ARTICLE

The present invention provides a polypropylene-based resin molded article having an excellent balance of rigidity, heat resistance, and impact resistance, and, in particular, having high impact strength; a method for producing the polypropylene-based resin molded article; and a method for improving...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YAMAGUCHI, MASAYUKI, IKOMA, REIRA, IWASAKI, SHOHEI, UCHIYAMA, YOHEI
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:The present invention provides a polypropylene-based resin molded article having an excellent balance of rigidity, heat resistance, and impact resistance, and, in particular, having high impact strength; a method for producing the polypropylene-based resin molded article; and a method for improving the impact resistance of a polypropylene-based resin molded article. The polypropylene-based resin molded article comprising a layered structure including layers A and B comprising a polypropylene-based resin, one of the layers A and B having a polypropylene chain orientation different from that of the other layer; and each of the layers A and B having a maximum absolute value of birefringence of 0.005 or more, the birefringences of the layers A and B being different from each other, one being positive and the other being negative.