D - Textiles – Paper – 06 – N
Patent
D - Textiles, Paper
06
N
117/109.5
D06N 7/00 (2006.01) D06C 15/02 (2006.01) D06N 3/00 (2006.01) D06N 3/04 (2006.01) E04D 12/00 (2006.01)
Patent
CA 1255978
TITLE Vapor-Permeable Liquid-Impermeable Fabric ABSTRACT A process is provided for making a water-impermeable, vapor-permeable fabric. A lightweight continous coating of polypropylene resin is applied to the surface of a fibrous sheet to make the sheet impermeable to water and vapor. Subsequent calendering provides vapor permeability to the sheet while maintaining liquid water impermeability. The resultant product is particularly suited for use as a roofing-tile underlayment of as an air-infiltraion barrier.
534693
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
LandOfFree
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