Abstract: The paper addresses the problem of higher natural breakage in the spinning process of 4.2 tex long-staple cotton yarn. By analyzing the properties of raw material, adjusting process parameters and inspecting the condition of equipment, it is found out that for long-staple cotton with higher Micronaire value and shorter length, higher number of twists should be applied to the roving and the number of twists should be adjusted in accordance with the change of material quality. For specially-spun ultrafine long-staple cotton yarn, high roving weight per unit and high drafting ratio of spun yarn make major contribution to high natural breakage.

Key words: long-staple cotton; high-count yarn; specially-spun; breakage