Patent · US Active

Dimensionally stable ply suitable for roofing webs or roof-sealing webs

US7811950B2 · kind B2 · utility

11Cited by

5References

13Claims

0Family size

Assignee

Johns Manville · US

Inventors

Wolfgang Greiser · Neusäß, DE
Roger Souther · Woodruff, US
Bertrand Weiter · Bobingen, DE

Key dates

Filing date	Oct 25, 2004
Grant date	Oct 12, 2010
Priority date	—
Expiry date	Apr 6, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/689
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A polyester filament nonwoven ply is suitable for roofing and roof-sealing webs and has a latent shrinkage force which counteracts drafting forces which may subsequently occur as the result of stresses or during thermal processing operations. The roofing webs thus remain dimensionally stable even when exposed to heat. The shrinkage force is obtained according to the claimed process by drafting the ply accordingly in a drafting mechanism arranged after a dryer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.