Polyurethane foam sheet and method

Details Polyurethane foam sheet and method Polyurethane foam sheet and method

1977-02-11

1980-01-08

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Pore forming in situ

162108, 162155, 162168N, 162169, 162183, 428237, 428240, 428248, 428264, 428271, 428311, 428317, 428318, 428327, 428402, 428423, 428425, D21D 300

Patent

active

041826493

ABSTRACT:
Disclosed herein is a composite, self-supporting, polyurethane foam sheet prepared by forming an aqueous dispersion of hydrophilic polyurethane foam particles with fibers to serve as a binder therefor, wet-layering the dispersion onto a supporting screen to form a sheet, and removing water from the sheet. If desired, a porous web, woven or non-woven, e.g. paper, cloth, etc., can be positioned on the screen with the dispersion being layered out onto the web to form a laminar composite structure. Whether in sheet form or as a laminar structure the product of the invention is formed rapidly and possesses a desirable soft or cushioning feel.

REFERENCES:
patent: 2887431 (1959-05-01), Piersol
patent: 3149022 (1964-09-01), Griswold
patent: 3674621 (1972-07-01), Miyamoto et al.
patent: 3694301 (1972-09-01), Gruenewald et al.

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