Insulating and filler material comprising cellulose fibers and clay, and method of making same from paper-making waste

摘要

A soft fluffy light weight substance comprising cellulose fibers and clay suitable as a filler and insulatng material, which is dispersible and absorbent in oil but which is not dispersible or absorbable in water, is made from paper making sludge by heating the sludge with mechanical agitation at about 350 DEG F. to evaporate all water therefrom and convert the product to lipophilic granules which are then milled in a hammer mill and forced through a screen of 3/64-5/64 inch mesh.