Wear-resistant flexible sheet material and a method for its manu

Details Wear-resistant flexible sheet material and a method for its manu Wear-resistant flexible sheet material and a method for its manu

1978-02-02

1980-12-23

Anderson, Philip

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264321, 264DIG7, 521918, C08J 936, B27C 1500, B29D 2700

Patent

active

042411890

ABSTRACT:
A wear-resistant flexible sheet material, suitable for use as outer soles on footwear, is produced by pressing reconstituted polyurethane foam sheets in the substantial absence of air at temperatures above 150.degree. C. The sheets should have a density exceeding 15 lb/ft.sup.3 and are further densified by the hot pressing. The sheets are preferably pre-heated to 175.degree.-210.degree. C. and pressed under a pressure of 5 to 30 tons/ft.sup.2 for periods of up to 5 minutes. The sheets may be embossed or smooth surfaced and may contain pigments, plasticizers and other additives.

REFERENCES:
patent: 2878153 (1959-03-01), Hacklander
patent: 2994110 (1961-08-01), Hardy
patent: 3004293 (1961-10-01), Kreidl
patent: 3035280 (1962-05-01), Hacklander
patent: 3263010 (1966-07-01), Shultz
patent: 3354578 (1967-11-01), Ryan
patent: 3452122 (1969-06-01), Stern et al.
patent: 3452127 (1969-06-01), Lovette et al.
patent: 3746610 (1973-07-01), Hoegger

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