Abstract: To investigate the influence mechanism of filament properties on the wrapping structure and wear performance of cashmere/nylon double-wrapped composite yarn, this study used twist-free cashmere roving as the core and nylon filament as the outer wrapping material, systematically analyzing the effects of three key parameters: filament tension, linear density, and filament count. The results show that all three parameters significantly affect yarn structure. When the filament tension was 3 cN, the yarn exhibited a clear core-sheath structure with tight and uniform wrapping. At a filament linear density of 15 D, the yarn achieved an optimal balance between coverage and practical performance, demonstrating a CV value of 13.79%, a breaking strength of 220.8 cN, a 3-mm hairiness of 38 hairs/m, and an anti-pilling grade of 3. When the filament count was 96 f, the lower single-filament modulus facilitated the formation of a continuous and compact wrapping layer, resulting in the best hairiness control and abrasion resistance. This study provides theoretical foundations and practical guidance for developing high-quality cashmere/nylon composite yarns that combine excellent wrapping integrity with superior wearing comfort.

Key words: cashmere yarn; double-wrapped structure; filament tension; linear density; filament count