Oriented multilayer heat sealable packaging film capable of with

Details Oriented multilayer heat sealable packaging film capable of with Oriented multilayer heat sealable packaging film capable of with

1994-12-27

1996-06-18

Buffalow, Edith

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428516, 428910, 427569, 427576, 525240, B32B 712

Patent

active

055276083

ABSTRACT:
A biaxially oriented heat sealable multilayer film structure, suited for use in high altitude applications, which comprises:
(a) a core substrate having two surfaces, comprising i) a layer of homopolymer polyolefin and ii) a layer of block copolymer of ethylene and propylene having a MFR of 1 to 10, adjacent to at least one side of i);
(b) a polymeric heat sealable layer on one surface of said core substrate, said heat sealable layer comprising a polymeric material selected from the group consisting of a terpolymer of ethylene, propylene and butene-1, a random copolymer of ethylene and propylene, a random copolymer of propylene and butene-1, and blends thereof; and optionally,
(c) a high density polyethylene (HDPE) layer adjacent to the other surface of said core substrate (a).

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patent: 4564558 (1986-01-01), Touhsaent et al.
patent: 4870122 (1989-09-01), Lu
patent: 5093194 (1992-03-01), Touhsaent et al.
patent: 5194318 (1993-03-01), Migliorini et al.
patent: 5223346 (1993-06-01), Lu

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