kravitz专利名称：CO-EXTRUSION MULTI-LAYERED FILM 发明人：KIMURA MASAKATSU,NAKAMURA OSAMU 申请号：JP23268883
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申请日：19831212
公开号：JPS60125622A
公开日：
19850704
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ture摘要：PURPOSE:To improve aling strength, by molding a co-extrusion multi-layer film consisting of a straight chainlike ethylene-alpha-olefin copolymer layer, polypropylene resin and ethylene-alpha-olefin copolymer layer. CONSTITUTION:A co-extrusion multi-layer film which is formed of a layer A made up of straight chainlike ethylene-alpha-olefin copolymer who density is 0.910-0.945g/cm<3> and a resin composite layer B made up 60-98wt% polypropylene resin and 40-2wt% ethylene-alpha-olefin copolymer who density is less than 0.945g/cm<3> is formed by making a ratio of the layer A to a whole layer more than 50%. The foregoing multi-layered film is molded by a co-extrusion molding method and as for far concrete method an inflation method using a circular die and a T die co-extrusion molding method using a flat die are applied to this molding.
申请人：IDEMITSU SEKIYU KAGAKU KK
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