John L Mcmurray

US Patent:

20030100233, May 29, 2003

Filed:

Nov 1, 2001

Appl. No.:

10/004252

Inventors:

Roger Fynan - LaGrange GA, US
Philbrick Allen - Simpsonville SC, US
Brian Callaway - Moore SC, US
John McMurray - Clinton SC, US

International Classification:

B32B027/12
B32B023/02
B32B003/04
B32B005/12
B32B005/02
B32B027/04
D04H005/02
D04H003/00

US Classification:

442/058000, 442/001000, 442/043000, 442/050000, 428/121000, 428/130000, 428/192000

Abstract:

Roofing membrane comprises reinforcing scrim fabric and a polymeric material, such as EPDM or TPO. The fabric is preferably a polyester tri-directional laid scrim fabric made from continuous yarns, which is held together by an adhesive, such as polyvinyl alcohol (PVOH) or styrene butadiene rubber (SBR), or any other suitable adhesive such as plastisol polyvinyl chloride. The polyester scrim fabric includes a central area and selvage areas on opposing edges thereof. The selvage areas of the fabric include more strands of yam than the central area, to provide additional strength along the sides of the fabric. Further, the continuous yarns that make up the selvage are not cut along the edges, so that the continuous yarns form loops along the edge portions of the selvage areas.