Insulating and filler material comprising cellulose fibers and clay, and method of making same from paper-making waste
OwnerEdwin F. Neckermann, Joseph F. Woodinginventors
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Abstract
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.degree. 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.
Claims9
A method of making a low density filler and insulating material from sludge comprising a mixture of cellulose fibers and clay obtained by partially removing water from the white water slurry of a paper-making machine which comprises heating and agitating said sludge mixture at a temperature of at least 300.degree. F. but below the temperature at which the destruction of the cellulose fibers takes place, and for a time sufficient to convert the sludge mixture to granules that are substantially non dispersible and substantially non absorbable in water and milling said granules while forcing said granules through a -5/64 inch mesh screen.
A method of making a product from white water paper-making sludge which product is suitable by milling to produce a filler and insulating material which method comprises removing water from white water paper-making sludge to first produce a substantially dry water absorbable mixture of cellulose fibers and clay, and heating said mixture at a temperature of 300.degree. F.-500.degree. F. for a time sufficient to convert the water absorbable mixture to a substantially water free material which is dispersible in oil and substantially not water absorbable.
Dependencies are inferred from the claim text.