C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/18 (2006.01) B32B 27/08 (2006.01) B32B 27/28 (2006.01) B65D 30/02 (2006.01) B65D 65/40 (2006.01) C08J 3/24 (2006.01)
Patent
CA 2099440
A heat shrinkable film with improved shrink characteristics has ethylene vinyl acetate copolymer with nine to twenty percent by weight vinyl acetate, with narrow molecular weight distribution and a high degree of short chain branching. A multilayer embodiment includes a first layer of an acid copolymer, an ethylene alpha olefin copolymer, or blends of the two; and a second layer of ethylene vinyl acetate copolymer with nine to twenty percent by weight vinyl acetate, with narrow molecular weight distribution and a high degree of short chain branching. Another embodiment includes a first layer of an acid copolymer, an ethylene alpha olefin copolymer, and blends thereof; a second layer of ethylene vinyl acetate copolymer with nine to twenty percent by weight vinyl acetate, with narrow molecular weight distribution and a high degree of short chain branching; a third layer of a barrier copolymer; a fourth layer of ethylene vinyl acetate copolymer with nine to twenty percent vinyl acetate, with narrow molecular weight distribution and a high degree of short chain branching; and a fifth layer of an ethylene alpha olefin copolymer.
Cryovac Inc.
Smart & Biggar
W.r. Grace & Co.,-Conn.
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