山羊绒纤维的拉伸性能

研究了山羊绒纤维的拉伸性能以及单纱的拉伸松弛性能,并与细支羊毛纤维进行对比。研究结果表明:山羊绒纤维的比强度、拉伸模量,松弛时间高于羊毛;在较小定伸长条件下,山羊绒纱线拉伸应力松弛速率慢于羊毛纱线,即山羊绒纱线比羊毛纱线难定形,这些力学性能的差异是由于山羊绒纤维α-结晶度高于羊毛;在80~130℃干热条件下,山羊绒纱线的拉伸应力松弛速率及其定形率均随温度的提高而提高;当温度高于120℃时,提高不显著。

Tensile properties of cashmere fiber

This paper investigates the tensile properties of cashmere fibers and the tensile relaxation of cashmere single yarn in comparison with those of super-fine merino wool and wool yarn.It shows that the specific tenacity,tensile modulus and relaxation time of cashmere fiber are higher than those of wool;the relaxation rate of tensile stress of cashmere yarn is lower than that of wool yarn under the condition of small constant rate of extension,that is,cashmere yarn is more difficult to setting than wool yarn.These differences in mechanical properties between cashmere and wool fibers are resulting from that the-αcrystallinity of cashmere fiber is higher than that of wool.At different temperatures from 80℃to 130℃,the relaxation rate of tensile stress and degree of setting increase with the rising of temperature.However,when temperature is above 120℃,the increase of relaxation rate and degree of setting is not remarkable with the higher temperature.