Backed nonwovens prepared from synthetic fibers

Details Backed nonwovens prepared from synthetic fibers Backed nonwovens prepared from synthetic fibers

1996-12-27

1998-05-05

Choi, Kathleen

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Coated or impregnated woven, knit, or nonwoven fabric which...

Two or more non-extruded coatings or impregnations

442 74, 442417, D04H 164

Patent

active

057473919

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.

REFERENCES:
patent: 2941904 (1960-06-01), Stalego
patent: 3944702 (1976-03-01), Clark
patent: 3976525 (1976-08-01), Mednick
patent: 4957963 (1990-09-01), Burns et al.
patent: 4986908 (1991-01-01), Stout et al.
patent: 5207047 (1993-05-01), Prignitz
patent: 5354803 (1994-10-01), Dragner et al.
patent: 5389716 (1995-02-01), Graves
patent: 5447676 (1995-09-01), Fukuda et al.
Determination of Specific Surface Area of Colloidal Silica by Titration With Sodium Hydroxide, George W. Sears Jr, vol. 28, No. 12, pp. 1981-1983 (1956).

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