Coated films with good low temperature sealing properties...

Details Coated films with good low temperature sealing properties... Coated films with good low temperature sealing properties...

C - Chemistry, Metallurgy

08

L

C08L 91/08 (2006.01) B32B 27/18 (2006.01) B32B 27/32 (2006.01) C08J 7/04 (2006.01) C09D 123/08 (2006.01)

Patent

CA 2160581

Novel coated films ate disclosed wherein a base polymer film, e.g., oriented isotactic polypropylene, is coated with a composition comprising a copolymer of about 65 to 95 wt.% ethylene and about 5 to 35.% of acrylic or methacrylic acid (an "ethylene copolymer") based on the weight of the polymer in which about 2 to 80 % of the carboxylate groups are neutralized with metal ions from Group Ia, IIa or IIb of the Periodic Table, preferably sodium ions. Preferably the coating also contains microcrystalline wax and fumed silica. The coated films exhibit good low temperature sealing properties accompanied by satisfactory hot tack and resistance of the seals to immersion in water.

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