Abstract: In order to discuss the effect of fiber length on both spinning process and quality of resultant yarn, this paper provides proper theoretical analysis combined with a series of experimental researches. The results show that the over long fiber length will impede the fiber arrangement in yarn and require long procedure of spinning, and the evenness of yarn and yarn strength decreased. On the other hand, short length of fiber is expected to affect the tenacity of yarn. Therefore, reasonable length of fiber is expected to benefit both for processing and quality of the yarn.

Key words: fiber length, spinning, yarn evenness, yarn strength