Backed nonwovens prepared from synthetic fibers and process...

Details Backed nonwovens prepared from synthetic fibers and process... Backed nonwovens prepared from synthetic fibers and process...

D - Textiles, Paper

04

H

D04H 1/58 (2006.01) D04H 1/64 (2006.01) D06N 5/00 (2006.01)

Patent

CA 2140836

In the production of a backed nonwoven fabric by needle-punching, calendaring orheat treatment of a spun-bonded or fiber nonwoven produced from a polymer or synthetic fiber, subsequent further processing of the resultant nonwoven with anaqueous 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:SiO2 is from about 3:1 to 1:3 and the weight ratio of melamine resin:SiO2 is from about 10:1 to 1:1. The products have improved tear strength and dimensional stability.

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