Slip resistant roof underlayment

摘要

A roofing underlayment having a slip-resistant surface includes a woven polypropylene scrim laminated to a top layer made from a non-woven spun-bond polypropylene fabric. During lamination, the scrim is bonded to the top layer by a polypropylene coating that impregnates the scrim, thereby forming a structural bottom layer comprising the polypropylene-impregnated scrim. The non-woven fibers of the top layer provide a micro-textured, slip-resistant surface. A second polypropylene coating may be applied to the bottom surface of the bottom structural layer. An adhesive layer may optionally be applied either to the bottom surface of the bottom structural layer, or, if used, to the bottom surface of the second polypropylene coating.

主权项

1. A roofing underlayment, comprising:
a scrim formed from a woven polypropylene fabric; a top layer made from a non-woven spun-bond polypropylene fabric; and a polypropylene coating consisting of polypropylene, the polypropylene coating applied in liquid form to bond the scrim to the top layer and to saturate the woven fabric of the scrim to form a waterproof bottom structural layer, wherein the top layer is pressed into the polypropylene coating of the bottom structural layer to form a micro-textured surface.