Packaging shrink film

Details Packaging shrink film Packaging shrink film

C - Chemistry, Metallurgy

08

J

18/1039, 402/418

C08J 5/18 (2006.01) B29C 61/00 (2006.01) C08L 23/14 (2006.01)

Patent

CA 1236950

ABSTRACT OF THE DISCLOSURE A packaging shrink film consisting essentially of a random copolymer of propylene and an .alpha.-olefin having 4 or more carbon atoms or a random copolymer of propylene, an .alpha.-olefin having 4 or more carbon atoms and ethylene, said random copolymer satisfying the following conditions: (1) the content of an .alpha.-olefin having 4 or more carbon atoms in the copolymer is 8 to 30 mole %, (2) the content of ethylene in the copolymer is 3 mole % or less, (3) the content of a cold xylene-soluble portion in the copolymer is 15 to 60% by weight, and (4) the content of a boiling n-heptane-insoluble portion in the copolymer is 7% by weight or more, said film having been stretched. The packaging shrink film is soft and excels in low-temperature shrink charac- teristics as well as in transparency and gloss.

469865

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