长丝变形纱成纱熵变对抗弯刚度的影响  

Effects of texturing entropy change on bending stiffness of textured filament yarns

作　　者：姜岩[1] 姜丽[2] 王善元[3] 

机构地区：[1]温州大学美术与设计学院,浙江温州325035 [2]吉林省纺织品质量监督检验测试中心,吉林长春130062 [3]东华大学纺织学院,上海201620

出　　处：《纺织学报》2012年第3期18-21,共4页Journal of Textile Research

摘　　要：长纤复丝经变形加工,其结构系统熵值增大,这一现象往往伴随长纤复丝抗弯刚度的变化而发生。采用悬臂梁方法测试变形纱抗弯刚度,采用EIB测量变形纱直径而后测算变形纱成纱熵变,可对变形加工过程中线性体发生的熵变现象和抗弯刚度变化的关系进行定量分析。经测试,空气变形加工可使成纱成纱熵变由0.3增加到1.45,紊乱度由1.28增加到4.25;再经异收缩多重变形成纱熵变可增加到1.65,而紊乱度可增加到5.00左右。长丝片段紊乱度增加直接导致空气变形类纱线紊乱结构和缠结结构的形成与扩大,在宏观上呈现纱线抗弯刚度的迅速增大,从而进一步导致纱线手感变坏;多重变形有可能使已形成的纱线缠结结构得到调整,从而使纱线抗弯刚度下降。During the course of texturing,the entropy of the filament structure system was increased.Corresponding changes in its bending stiffness always occurred with this phenomenon at the same time.To quantitatively analyze the relationship between the entropy changing and stiffness changes of a linear model during texturing,cantilever measuring was used to measure the bending rigidity of the textured yarns while the EIB to test their diameter and then the relative entropy value were figured out.The results showed that air-texturing could rise the relative entropy value from 0.3 to 1.45 while the disordering degree 1.28 to 4.25;and further differential shrinking would increase the relative entropy value to 1.65,as well the disordering degree to around 5.00.The increased disordering degree of the filament′ fragments led to the forming and enlarging of the disordered structure and entanglement structure,as shown by the rapid increase of bending stiffness and worse handle of ATY;and by multi-texturing the entanglement structure might be adjusted and bending stiffness might be lowered.

关 键 词：熵 变形纱 成纱熵变 抗弯刚度 

分 类 号：TS106.4[轻工技术与工程—纺织工程]