Date of Award

12-1970

Degree Name

Bachelor of Science

Department

Paper Science and Engineering

First Advisor

John M. Fisher

Abstract

Many of the empirical strength tests used for determining end use performance of a paper sheet do not give a true indication of actual sheet properties and performance. The empirical tests of burst, tear, and folding endurance were made on eighteen paper samples of different grades of papers. The fundamental tests of tensile strength, elongation, and tensile energy absorption were also made on the same samples using a stress-strain tester. The fundamental tests were used in showing deficiencies and discrepancies in the empirical test values.

The discrepancies found indicated a need for increased fundamental testing to be use in predicting the end use performance of a paper sheet in routine control work. Elongation was found to be an important fundamental property showing little significance in the empirical tests. Fundamental properties explained the reasons for one sheet being better than another sheet, but the empirical tests could not. Stress-strain testing used in conjunction with a computer could determine other fundamental properties of the sheet. Stress-strain testing appeared to be an improved approach in predicting end use performance. The fundamental properties obtained from stress-strain testing could be used to make sheet improvements based on sound scientific reasoning.

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