White opaque barrier layer film with excellent lay-flat properti

Details White opaque barrier layer film with excellent lay-flat properti White opaque barrier layer film with excellent lay-flat properti

1994-03-01

1995-09-12

Buffalow, Edith

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428 367, 428349, 428480, 428516, 428520, 428910, B32B 516

Patent

active

054495520

ABSTRACT:
The invention relates to a multilayer composite film consisting of a surface layer A, a gas barrier layer C, a heat sealing layer D and, optionally, adhesive or coupling layers B, the individual layers being arranged as follows in the composite film:
A a biaxially stretched, white opaque polypropylene film,
B an adhesive or coupling layer,
C a gas barrier layer with a permeability to oxygen of at most 30 Ncm.sup.3 /m.sup.2 d bar (23.degree. C./0% relative humidity),
B an adhesive or coupling layer,
D a heat sealing layer,
layers A and C optionally being interchangeable.

REFERENCES:
patent: 4698261 (1987-10-01), Bothe et al.

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