Heat sealable microporous polypropylene films

Details Heat sealable microporous polypropylene films Heat sealable microporous polypropylene films

1987-03-27

1988-03-29

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283177, 4283179, 428516, 428910, B32B 326

Patent

active

047343249

ABSTRACT:
This invention relates to a microporous film having a heat sealable layer on one or both sides thereof. The porosity and permeability of the microporous layer are retained despite the application of the heat seal layer.

REFERENCES:
patent: 3903234 (1975-09-01), Ikeda
patent: 3908650 (1975-09-01), Dunshee et al.
patent: 4359497 (1982-11-01), Magder et al.
patent: 4582752 (1986-04-01), Duncan
patent: 4596738 (1986-06-01), Metcalfe et al.
patent: 4626460 (1986-12-01), Duncan
patent: 4632869 (1986-12-01), Park et al.

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