Stress-Strain Properties of Mercerized, Stretched, and Durable-Press Treated Cotton Fibers

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Abstract
Six cotton samples were slack-mercerized and stretched to 0.94, 1.0, and 1.036 of the original length. All treatments were given an overtreatment of durable-press resin. The effect on 3.2-mm-gauge bundle tenacity and elongation depended on the amount of stretching. Samples slack-mercerized and stretched to original length increased in tenacity an average of 50%, and with an overtreatment of resin, 89% of the tenacity was retained. Samples differed in their reactions to the treatments. The percent retention of tenacity after treatment varied inversely with the ratio of the 3.2-mm-gauge length tenacity to the zero-gauge length tenacity of the untreated fibers. Clamps and stretchers developed to stretch the mercerized cotton fiber bundles are described.