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Each thread has different strength and performance, but recently many new customers have a strong desire to know the strength and performance of polyester sewing thread. Therefore, the editor of the textile net analysis is as follows:

1) Strength of sewing thread yarn

The fiber breaking strength is improved. Although the slippage length increases and the number of slippage fibers in the yarn section increases relatively, the total strength of the broken part of the fiber will be greatly improved. Therefore, the higher the breaking strength of the fiber, the higher the strength of the yarn.

2) Friction properties of sewing thread yarns

When the friction coefficient u of the fiber surface increases, the sliding resistance between fibers is large, the slipping length Lc decreases, the proportion of slipping fibers decreases, and the yarn strength increases. Increasing the number of crimps of the fibers can increase the sliding resistance between fibers, which is not only conducive to the smooth progress of the spinning process, but also to the improvement of the yarn strength.