Synthetic fiber nylon ties lack hydrophilic groups. The hygroscopicity of polyethylene and polypropylene is almost zero, and that of polyester is only 0.4%, which is far from meeting people's wearing requirements. Therefore, people began to study the improvement of hygroscopicity of synthetic fibers, so that the hygroscopicity of polyester single fiber and fabric is higher than that of raw cotton, which can be comparable with wool fabrics, improve the hygroscopicity, and improve the anti pilling, anti-static and other properties of nylon ties, And it has ion exchange performance. The alkali treatment of Donghua University has achieved good results. In addition, good progress has been made in finishing and modification with hydrophilic agent. Deep embossing machine manufacturers will also need to use ties for some activities.