Patent · US Expired

Laminate with improved properties

US7494558B2 · kind B2 · utility

1Cited by

8References

17Claims

0Family size

Assignee

Johns Manville · US

Inventors

Jörg Lehnert · Birkenfeld, DE
Werner Groh · Lich, DE
Michael Schops · Großaitingen, DE
Hermann Weizenegger · Schwabmünchen, DE

Key dates

Filing date	Oct 17, 2002
Grant date	Feb 24, 2009
Priority date	—
Expiry date	Dec 11, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/682
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Composites made from at least two plies are described, where one of the outer layers is a layer comprising glass fibers, and in particular is a staple glass fiber nonwoven. The layers have been bonded to one another by needling, and the extent of this needling is such that some of the fibers of the organic nonwoven emerge from the surface of the glass fiber sheet. The composite is then provided with a binder by using a rotating roll for single-side application to the glass fiber surface. The composites are particularly suitable for producing bituminized prefabricated roofing and waterproofing sheets, and as backings for coatings, e.g. PVC coatings.

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