Microporous protective coverings

Details Microporous protective coverings Microporous protective coverings

1979-06-20

1980-11-18

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

2 21R, 156252, 156272, 219121LM, 428134, 428338, 428339, B32B 326

Patent

active

042346371

ABSTRACT:
A flexible, microporous, non-water soluble, non-skin-toxic film is provided for use in protective garments such as diver's suits, foul weather suits and the like. The film is of a thickness in the range of about 12.5.mu. to 12.5 mm and possesses about 100 to 1000 pores of a diameter in the range of about 2 to 100.mu. per cm.sup.2 of film surface. The porosity of the film permits the passage of body vapors but prevents, at least up to modest external pressures, the counter-passage of water. The film can be of a foamed material to provide increased insulational value.

REFERENCES:
patent: 3226527 (1965-12-01), Harding
patent: 3594261 (1971-07-01), Broerman
patent: 3695988 (1972-10-01), Steigerwald
patent: 3725190 (1973-04-01), Bostick
patent: 3770560 (1973-11-01), Elder
patent: 4032743 (1977-06-01), Erbach et al.

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