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Composition for drawn film, cold drawn film made of said composition and process for manufacture of said film
Composition for drawn film, cold drawn film made of said composition and process for manufacture of said film
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机译:拉膜用组合物,由该组合物制成的冷拉膜和该膜的制造方法
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摘要
A composition for shrinkable film which excels in heat- sealability, transparency, strength, and particulaly low-temperature quick shrinking property and, therefore, suits production chiefly of packaging materials, a film made of the composition and a process for the manufacture of the film are disclosed. Specifically, the composition comprises one of the specific combinations of components (A), (B) and (C), i.e. the combinations of (A)+(B), (B)+(C) and (A)+(B)+(C), wherein (A) is non- rigid polyolefine resins such as ethylene vinyl acetate, (B) is an elastomer comprising a specific ethylene-&agr;-olefin copolymer, and (C) is rigid polyolefin resins such as polypropylene. The packaging film excelling particularly in optical property, mechanical strength and low- temperature shrinking property is obtained by converting a homogenenous blend of the aforementioned composition, either in its crosslinked form or in its non-crosslinked form, into a tubular raw film, which is stretched at a temperature low enough for imparting a high orientation to the film. The process for the manufacture of this packaging film is also disclosed.
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