Abstract: This invention relates to dry, dense, hydrophilic polyurethane foam cleaning pads containing abrasives, detergents and combinations thereof dispersed integrally therein as well as to a method of manufacturing these pads. The pads' surfaces are strengthened by the densification of the reacting prepolymer resin during manufacture, and preferably the pads have at least one surface textured for additional cleaning area. The surfaces can contain an optional additional layer of abrasives to obtain a greater durability and a more desirable scouring action.
Type:
Grant
Filed:
October 30, 1978
Date of Patent:
December 20, 1983
Assignee:
Sherwood Research and Development Partnership
Inventors:
Robert L. Strickman, Melvyn B. Strickman