Studies on the Japanese Paper Yarn (No. 37)

On Utilization of Readily Soluble Vinylon Fiber for Making the Japanese Paper Yarn (Preliminary Experiment)

Abstract

A preliminary experiment was carried out to determine the effects of Hardly Soluble Vinylon fiber and Readily Soluble Vinylon fiber when blended into raw paper for the Japanese paper yarn, and the results are as follows.
1) The raw paper was strengthened by blending Vinylon fiber with N·UKP, especially Readily Soluble Vinylon fiber. But, when twisted into yarn, the tensile strength decreased more than that of the non-blended yarn as times of twist given to the yarn increased, provided that the Vinylon fiber content was within the limit of this experiment. In other words, the tensile strength is high when twisted a few times, whereas the tensile strength is low when twisted many times, due to damages given to the yarn by twisting.
2) Therefore, when twisting the Vinylon fiber blended yarn, an ample amount of water must be given to soften the paper.
3) The tensile strength of the raw paper blended with 1 d-5 mm Hardly Soluble Vinylon fiber was stronger than that of the paper blended with 3 d-15 mm Hardly Solubly Vinylon fiber, but the tensile strength of the yarn blended with 3 d-15 mm Vinylon fiber was stronger than that of the yarn blended with 1 d-5 mm Vinylon fiber. In other words, when twisted, the thicker and the longer a fiber was, the stronger the yarn became.