Polypropylene film with cold seal release and cold seal receptiv

Details Polypropylene film with cold seal release and cold seal receptiv Polypropylene film with cold seal release and cold seal receptiv

1994-05-23

1996-01-09

Ryan, Patrick J.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428206, 428331, 428446, 428451, 428454, 428500, 428910, B32B 2708

Patent

active

054827809

ABSTRACT:
An oriented polymeric alpha-olefin film having: an isotactic polypropylene homopolymer core; a cold seal release skin layer adherent to one side of the core; and a surface treated cold seal receptive layer or such treated layer with a cold seal cohesive composition over the surface treatment of said layer on the other side of the core. The cold seal release skin layer comprises a slip agent and a blend of two polymers, namely, an ethylene-propylene random copolymer containing about 2% to 8% of ethylene in such copolymer and an ethylene-butylene copolymer containing about 0.5% to 6% of ethylene in such copolymer. The cold seal receptive layer is of an ethylene-propylene random copolymer containing about 2 to 8% of ethylene.

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