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In order to solve the problems of high production cost, low user experience satisfaction, and difficulty in meeting consumers' individual needs in traditional down garment sewing due to the time- consuming and time-consuming process and the difficulty in quickly and intuitively feeling the dressing effect, a down jacket was taken as the research object and 3D virtual sewing was completed with Style3D modeling software, the sewing technology was improved and optimized, and the effective and feasible virtual sewing technology measures for down garments were discussed. The results show that the method of directly generating the lining layer can effectively reduce the virtual sewing time; choosing the appropriate type sewing will result in a cleaner sewing effect for clothing; the convenient filling effect can be achieved by cutting the bottom hem of down jacket separately; the double-layer folding effect of the cuffs can reduce collision detection time and improve simulation fidelity by cutting into a single layer, and increasing the additional rendering thickness of the fabric. The research results aim to provide reference for virtual setting, efficient simulation, and realistic display of similar types of clothing. [ABSTRACT FROM AUTHOR]

This study has focused on the production process measures of yak cashmere/cotton blended fine shirt yarn. Based on the characteristics of yak cashmere performances, the article presented a process route for long-staple cotton/yak cashmere blended fine yarn by combining the pure worsted slivering with the cotton type spinning system. The processing parameters and production conditions in such processes of yak cashmere and cotton blended yarn as yak cashmere stripping, carded slivering, combed slivering, and blending and drawing process, are discussed, and the performance testing for tops and yarns produced are also investigate in this paper. Test results indicated that, when blended with more than 80% of long-staple cotton, the spinnability of yak cashmere fiber would be improved, the complement of the advantages of the two materials could be realized, and the lower linear density of yak cashmere/cotton fine woven yarn would be obtained, which is suitable for the following development such as shirt fabric, and enhances the marketability of yak cashmere. [ABSTRACT FROM AUTHOR]