Patent · US Expired

Laminate with web and laid components

US6235657A · kind A · utility

11Cited by

20References

19Claims

0Family size

Assignee

Johns Manville International Inc. · US

Inventors

Michael Schops · Großaitingen, DE
Franz Kaulich · Bobingen, DE
Bertrand Weiter · Bobingen, DE

Key dates

Filing date	Jun 1, 1993
Grant date	May 22, 2001
Priority date	—
Expiry date	Jun 1, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/687
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

There are described a dimensionally stable laminate whose surfaces are formed by spunbonded webs and comprising at least two layers of spunbonded and at least one laid layer of reinforcing yarn, the laid layer or layers each being disposed between two layers of spunbonded and having a thread density of from 0.5 to 3 threads/cm, spunbonded and laid layers having been joined together by needling at about 20-70 stitches/cm.sup.2, a process for manufacturing this laminate, and its use for manufacturing roofing sheets and roof sealing sheets.

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