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US 4,808,675 AGranted
Moisture permeable film for lamination to a textile material
AssigneeAllied-Signal Inc.
InventorsIan C. Twilley, Robert A. Lofquist
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AssigneeAllied-Signal Inc.
InventorsIan C. Twilley, Robert A. Lofquist
Estimating the term…
This invention is a water-resistant film for lamination to a textile material, and the flexible, laminated product produced therewith. The film has a permeability of at least 0.0008 metric perm-cm. at 20.degree. C. and 65 percent relative humidity and of at least 0.0006 metric perm-cm. at 30.degree. C. and 50 percent relative humidity. The film is formed from a block copolymer having a number average molecular weight of from about 15,000 to about 35,000. The block copolymer contains polymer segments prepared by the amination of a polyether formed by treating a polyethylene glycol with an alkylene oxide of three or more carbon atoms. The product is a laminant of a layer of the described film and a layer of a textile material, and is useful in the formation of water-resistant, moisture permeable articles such as garments, tarpaulins, tents, and the like.
A water-resistant film for lamination to a textile material, said film having a permeability of at least 0.0008 metric perm-cm. when tested at 20.degree. C. and 65 percent relative humidity and of at least 0.0006 metric perm-cm. when tested at 30.degree. C. and 50 percent relative humidity, said film being formed from a block copolyether amide having a number average molecular weight of from about 15,000 to about 35,000 and containing polymer segments, said segments being prepared by the amination of a polyether formed by treating a polyethylene glycol with an alkylene oxide having at least three carbon atoms.
Dependencies are inferred from the claim text.