Enzyme-treated paper

• US 3,966,543 A
• Filed: 10/30/1972
• Issued: 06/29/1976
• Est. Priority Date: 10/30/1972
• Status: Expired due to Term

• Current Assignee: Baxter Laboratories, Inc. (Baxter International Inc.)
• Original Assignee: Baxter Laboratories, Inc. (Baxter International Inc.)
• Inventors: Moskowitz, Gerard J., Cayle, Theodore
• Primary Examiner(s): Lindsay, Jr., Robert L.
• Assistant Examiner(s): Chin, Peter
• Application Number:
  US05/302,323
• Time in Patent Office: 1,338 Days
• Field of Search: 162/158, 162/158 R, 162/158 N, 195/8, 195/33, 195/63, 195/68, 195/DIG. 1
• US Class Current: 162/158
• CPC Class Codes: D21H 21/14 characterised by function or properties in or on the paper D21H19/66, D21H27/02 take precedence
• CPC Class Codes: D21H 21/20 Wet strength agents
• CPC Class Codes: D21H 23/28 Addition before the dryer section, e.g. at the wet end or press section
• CPC Class Codes: D21H 23/42 Paper being at least partly surrounded by the material on both sides D21H23/34 takes precedence
• CPC Class Codes: D21H 23/50 Spraying or projecting D21H23/44, D21H23/66 take precedence

Abstract

A dilute, aqueous solution of cellulase enzyme complex is applied to the wet paper web during paper manufacture to improve the disintegratability of the paper during subsequent disposal.

Claims

1. A process for improving the disintegratability of moistened paper comprising applying a dilute aqueous solution of a cellulase enzyme complex containing at least about five units each of C₁ - and C_x -components of enzyme activity per ml. of said solution to newly formed paper after leaving the forming section but prior to entering the drying section so that said paper contains from about 75% to about 80% water after said application, followed by drying in which the temperature of said paper is not raised above about 100°

C, the amount of said complex being such as to provide at least about 50 C₁ units per gram of paper.

2. The process of claim 1 in which the cellulase enzyme complex is obtained from Trichoderma viride.

3. The process of claim 2 in which the Trichoderma viride is the strain number QM 9123.

4. A cellulosic fiber paper in disposable form comprising cellulosic fibers and cellulase with latent enzymatic action, and the cellulase being present in sufficient amount to substantially enhance the disintegration of the paper when exposed to moist conditions.

5. A process for producing a cellulosic fiber paper having improved disintegration properties when exposed to moist conditions, comprising the steps of impregnating the cellulosic fiber paper with cellulase and drying said impregnated paper to form a paper containing cellulase with latent enzymatic action.