Porous polymer film

Details Porous polymer film Porous polymer film

1974-12-24

1976-07-13

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428910, 428141, D06N 304

Patent

active

039695620

ABSTRACT:
A plane-oriented, open porous film consisting of 100 parts by weight of crystalline high molecular material and 1 to 300 parts by weight of material having a lower melting point than that of the crystalline high molecular material, including a number of flat, fine voids extending along the rectangular direction of the thickness in the film and fine arc-shaped fiber structures on the surface thereof. The film exhibits a high degree of electric insulation, a high mechanical strength and a high permeability to gas as well as to certain liquids.

REFERENCES:
patent: 3725520 (1973-04-01), Suzuki et al.
patent: 3758661 (1973-09-01), Yamamoto et al.
patent: 3765999 (1973-10-01), Toyoda
patent: 3773608 (1973-11-01), Yoshimura et al.
patent: 3773609 (1973-11-01), Haruta et al.
patent: 3783088 (1974-01-01), Yoshiyasu et al.
patent: 3801404 (1974-04-01), Druin et al.
patent: 3839516 (1974-10-01), Williams et al.
patent: 3841943 (1974-10-01), Takashi et al.

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