Chemically-impregnated microporous films

Details Chemically-impregnated microporous films Chemically-impregnated microporous films

1978-10-26

1981-09-15

Van Balen, William J.

Stock material or miscellaneous articles

Decorative article

Constructed from filamentary or flat sheet material

428357, 428905, 428907, 428910, B32B 312, B32B 326, B32B 328

Patent

active

042898323

ABSTRACT:
There is disclosed a novel apparatus for the selective stretching of a coated or impregnated substrate of a synthetic thermoplastic polymer or blends thereof to form an impregnated microporous film thereof.

REFERENCES:
patent: 2491646 (1949-12-01), Coleman et al.
patent: 3511742 (1970-05-01), Rasmussen
patent: 3615691 (1971-10-01), Duwien
patent: 3697367 (1972-05-01), Schwarz
patent: 3839516 (1974-10-01), Williams et al.
patent: 3843479 (1974-10-01), Matsunami et al.
patent: 3867558 (1975-02-01), Sato et al.
patent: 4056639 (1977-11-01), Schwarz

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