摘要
长丝变形纱在变形加工过程中,其成纱熵变是增加的。成纱熵变是状态函数,其与变形纱紊乱度的对数成正比,因此成纱熵变对变形纱的表观条干均匀度有显著影响。随着成纱熵变和紊乱度不断增加,变形纱的外观和性能均发生明显改变,其表观CV值迅速增加,并接近短纤维纱条干CV值,仿短纤维纱化效果明显。这种状况可通过长丝变形纱表观直径变化总频数及频率分布加以表现。由膨松结构引起的空气变形纱表观条干均匀度值的异常改变使其与质量条干均匀度值不相关,这是变形纱区别于传统短纤维纱的主要特征之一。
During the course of texturing,the entropy of the textured yarn increases.The entropy changing during texturing is a state function for which the entropy changing of the textured yarn varies directly to the logarithm of the disordered degree of the yarn,hence the entropy changing during texturing influences the evenness of the yarn significantly.The appearance and properties of the textured yarn keeps changing along with the developing of its entropy changing and disorderness degree,and its apparent CV value increases rapidly to the level of normal spun yarn and results in a perfect spun yarn-like effect.All of these situation can be further expressed by the total frequency of apparent diameter change and frequency distribution of the filament textured yarn.Owing to the bulky structure,the variation of the apparent evenness value makes it out of proportion to the mass evenness value,which is a primary difference between the textured yarn and spun yarn.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2010年第2期10-13,共4页
Journal of Textile Research
基金
浙江省教育厅科研项目(20070536)
关键词
熵
变形纱
成纱熵变
条干均匀度
CV值
entropy textured yarn texturing entropy changing evenness CV value
