Backed nonwovens prepared from synthetic fibers
US5747391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Dec 27, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/699
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In the production of a backed nonwoven fabric by needle-punching, calendaring or heat treatment of a spun-bonded or fiber nonwoven produced from a polymer or synthetic fiber, subsequent further processing of the resultant nonwoven with an aqueous solution or dispersion of a crosslinkable polymer or melamine resin and subsequent drying and coating with bitumen or PVC plastisol, the improvement wherein the solution or dispersion contains silica sol in a quantity such that the weight ratio of polymer:SiO.sub.2 is from about 3:1 to 1:3 and the weight ratio of melamine resin:SiO.sub.2 is from about 10:1 to 1:1. The products have improved tear strength and dimensional stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.