Coated polyolefinic film having low adhesion to the welding...

Details Coated polyolefinic film having low adhesion to the welding... Coated polyolefinic film having low adhesion to the welding...

B - Operations, Transporting

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B29D 7/01 (2006.01) B29D 99/00 (2010.01) C08J 7/04 (2006.01) C09D 131/04 (2006.01) C08L 33/06 (2006.01)

Patent

CA 1218572

ABSTRACT OF DISCLOSURE Films comprising alpha-olefin polymers, such as polypro- pylene consisting essentially of recurring propylene units and having a substantial crystalline polypropylene content, and in particular isotactic polypropylene, are rendered low adhesive to the welding bars of automatic and semi-automatic machines conven- tionally used for the manufacture of containers, evelops, bags, vessels and, in general, other manufactured articles useful in the packaging industry, by coating the films by a mixture of a copolymer of a vinyl ester with an unsaturated acid, a terpolymer of an alkyl acrylate, an alkyl-methacrylate and an unsaturated acid and a cross-linking amine.

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