Date of Award

4-1967

Degree Name

Bachelor of Science

Department

Pulp and Paper Technology

First Advisor

Dr. R. A. Diehm

Abstract

A study of the effects of surface tension and viscosity on wet-web strength shows that they are related. Hand sheets were made and pressed on the Noble and Wood Sheet Mold. Tests were run on sheets with solids varying from 18 to 28 percent. The Instron Tensile Tester gave more consistant results for wet-web testing than did the Brecht Tester. Carboxy propyl methyl cellulose, a cationic starch, oleic acid, and sodium hydroxide were used to vary the surface tension and viscosity of the entrained water in the web. It was found that as the surface tension was lowered, the wet-web strength went down, and that an increase in viscosity also lowered the wet-web strength.

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