Patent · US Expired

Process for the production of uncoated technical fabrics with low air permeability

US5581856A · kind A · utility

20Cited by

26References

16Claims

0Family size

Assignee

Akzo N.V. · NL

Inventors

Wolf R. Krummheuer · Wuppertal, DE
Hans A. Graefe · Schwelm, DE
Volker Siejak · Sörup, DE

Key dates

Filing date	May 31, 1995
Grant date	Dec 10, 1996
Priority date	—
Expiry date	May 31, 2015

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD03D1/02
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Uncoated technical fabric is produced in a dense weave with low air permeability. The fabric contains polyamide filament yarns with a hot air shrinkage of 6 to 15% (determined at 160.degree. C.) and has an at least substantially symmetrical fabric construction. The fabric is adjusted to the required air permeability by a treatment in an aqueous bath at 60.degree. to 140.degree. C.

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