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KOMPOSISI YANG BAIK BAGI FILM POLIPROPILENA YANG TERORIENTASI DENGAN SUMBU GANDA DAN DAPAT MENYUSUT AKIBAT PANAS DENGAN SUMBU TUNGGAL
KOMPOSISI YANG BAIK BAGI FILM POLIPROPILENA YANG TERORIENTASI DENGAN SUMBU GANDA DAN DAPAT MENYUSUT AKIBAT PANAS DENGAN SUMBU TUNGGAL
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机译:单一来源的多取向聚丙烯薄膜和热收缩的良好组成
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摘要
A uniaxially heat-shrinkable, biaxially oriented, multilayer film having a polypropylene-containing core layer comprising at least 70 wt. % of said multilayer film and optionally, at least one polyolefin-containing skin layer adjacent said core layer, is prepared by biaxially orienting a coextrudate and therefore orienting said coextrudate by stretching 10 to 40 % in the machine direction. The core layer contains isotactic polypropylene and a sufficient amount of syndiotactic polypropylene to inhibit uniaxial heat shrinkage at temperature below about 50 DEG C. The skin layer can be selected from the group consisting of polypropylene, ethylene-propylene copolymer, polyethylene, and ethylene-propylene-butylene terpolymer.
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