著者

森 俊夫 岩佐 美代子

出版者

The Japan Society of Home Economics

雑誌

家政学雑誌 (ISSN:04499069)

巻号頁・発行日

vol.36, no.5, pp.305-311, 1985-05-20 (Released:2010-03-10)

参考文献数

9

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The extensional properties and the stress-relaxation properties of representative round and square braids were studied by changing yarn species. Silk, promix and vinylon yarns were used as the materials. Maximum load, Young's modulus, work, energy loss and resilience of the round braids were lower than those of the square ones. Difference between both braids in the recovery percentage was not found. The extensional properties except for the recovery percentage and the resilience differed more or less depending on the yarn species. As the results of the stressrelaxation experiments, the rheological properties of the braids were found to be represented by a parallel combination of three Maxwell models and an elastic moment. Much differences were found between the rheological parameters of the round and square braids. The yarn species gave a pronounced difference in the relaxation time rather than in the other parameters, such as viscosity and elasticity. These results were discussed in terms of the spatial inadaptability of yarn bundles and of the rheological properties of the material yarns.