Foam structure

Details Foam structure Foam structure

1996-11-01

1998-02-24

Teskin, Fred

Stock material or miscellaneous articles

Pile or nap type surface or component

Particular backing structure or composition

4283084, 4283202, 4283227, 428333, 428337, 428339, 1563071, 1563075, 521 54, 521904, B32B 326

Patent

active

057210357

ABSTRACT:
The present invention is based upon the discovery that composite open-cell foam structures, such as carpet underlay cushions, having improved compression resistance and better wear characteristics can be manufactured by utilizing a carboxylated styrene-butadiene rubber latex which is comprised of a styrene-butadiene rubber latex and a carboxylated styrene-butadiene rubber latex. The subject invention more specifically discloses a carpet underlay cushion structure comprising: a carrier layer of open-cell, resilient polyurethane foam material, said resilient foam material being substantially completely and uniformly impregnated with a carboxylated styrene-butadiene rubber latex blend, wherein said carboxylated styrene-butadiene rubber latex blend is comprised of (a) about 70 weight percent to about 95 weight percent of a styrene-butadiene rubber latex and (b) from about 5 weight percent to about 30 weight percent of a carboxylated styrene-butadiene rubber latex; the impregnated foam material being dried after said impregnation to produce a foamed, open-cell, resilient composite cushion structure wherein the open cells thereof partially comprise said carrier layer of polyurethane foam material.

REFERENCES:
patent: 4098944 (1978-07-01), Pollock
patent: 4279953 (1981-07-01), Barden et al.
patent: 4957798 (1990-09-01), Bogdany

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