Abstract: Methods of making paper or paperboard are described. In one method, at least one cellulytic enzyme composition and at least one cationic polymer composition are introduced to a paper making pulp at about the same time to form a treated pulp. The pulp may also be treated with at least one cationic starch. The resulting pulp is formed into a sheet of pulp. Other paper making processes are also described. A paper making apparatus is also described for carrying out the methods. Paper and paperboard made according to the methods are also described.
Type:
Grant
Filed:
November 13, 2000
Date of Patent:
September 6, 2005
Assignee:
Buckman Laboratories International, Inc.
Inventors:
Walter B. Hill, Jr., Richard L. Barclay, James A. O'Malley, Randall W. Conrod, John Desjardins, Roger M. Plourde