捧着莹莹的腿疯狂输出视频,最刺激黄a大片免费观看下载,国产棈品久久久久久久久久免费看,chinese国产AV

Sewing thread is the thread required for knitted clothing products, sewing thread can be divided into natural fiber sewing thread, synthetic fiber sewing thread and mixed sewing thread three categories. With the development of polyester industry, more and more pure polyester fibers are used as raw materials for sewing thread.
Polyester fiber is an excellent quality synthetic fiber, used to produce high strength stitches, second to nylon in the suture, and does not reduce strength when wet. Its shrinkage rate is very small, after proper setting, the shrinkage is less than 1%, so the sewing stitch can maintain a flat and beautiful, no wrinkle, wear resistance is inferior to nylon, low moisture recovery rate, good low temperature resistance, light resistance and water resistance. Therefore, polyester thread is the most used variety, in many cases, instead of cotton sewing thread.
Polyester thread has many uses. It can be used for sewing cotton fabrics, chemical fiber fabrics and blended fabrics, and can also be used for sewing knitted outerwear. Polyester thread is also an excellent thread for footwear and hat leather industry.