Date of Award

4-1995

Degree Name

Bachelor of Science

Department

Paper Science and Engineering

First Advisor

Dr. David Peterson

Abstract

One of the most important objectives in the papermaking process is to produce paper with good strength properties. Some specialty paper grades need strength properties which exceed those attainable when only wood fiber is present in the final product. To achieve the additional strength, various additives and fibers can be added to the furnish, or supplementary processes can be performed on the paper. The objective to this thesis was to determine the strength effects of saturating paper containing nylon stock, and to attempt to correlate the strength relationship between the two strength enhancing parameters.

To observe the effects of nylon fiber properties, standard paper samples were produced with three different levels of nylon addition: 0, 15, and 30%. The amount of latex added to the sheets by the saturation process was also varied, to determine the latex bonding effects on strength.

The results of the experimentation showed that both the tear strength and the stretching ability of paper increased when nylon was added to the furnish. The tensile and burst strength of the paper was found to decrease with nylon addition, however. The nylon addition was also found to significantly decrease sheet formation, which affected testing results. The improved bonding created by the saturation process was found to increase all the strength properties tested, with burst strength showing the largest improvements. Before implementing either procedure, a careful cost versus property improvement analysis must be completed in order to determine if their use would truly be beneficial.

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