Moisture vapor permeable sheet materials

Details Moisture vapor permeable sheet materials Moisture vapor permeable sheet materials

1983-08-08

1985-02-05

Herbert, Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

2601237, 4284231, 4284782, 521 50, 524 27, B32B 2734, B32B 2740

Patent

active

044978626

ABSTRACT:
A moisture vapor permeable sheet material is comprised of a homogeneous admixture of a synthetic polymer material and a protein derivative. The sheet material is moisture vapor permeable and non-penetrable by liquid water. The sheet material additionally can have coated thereon a pressure sensitive adhesive which is comprised of a snythetic organic polymer adhesive and a soluble protein derivative in solid solution. Sheet material is formed by providing a homogeneous fluid solution of a soluble protein derivative and a synthetic organic polymer in a solvent. The protein derivative has a pH level compatible with the pH level of the organic polymer. Film is formed from the homogeneous fluid solution and the solvent is removed from the film to form the sheet material which is moisture vapor permeable. When the sheet material includes an adhesive, the adhesive is coated as a fluid solution in a solvent on one side of the sheet material.

REFERENCES:
patent: 4285986 (1981-08-01), Cioca et al.
patent: 4295894 (1981-10-01), Cioca et al.
patent: 4307717 (1981-12-01), Hymes et al.
patent: 4363760 (1982-12-01), Cioca
patent: 4412947 (1983-11-01), Cioca

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