In the weaving process, the role of warp dropper is crucial. Traditional warp droppers are mostly made of stainless steel. Although they are heavy and expensive, they can be quickly detected and stopped when the warp yarn breaks. However, when the warp droppers made of this material rub against the warp yarn, the number of fibers per unit cross section of the yarn will decrease, the yarn body will be loose and disordered, the yarn will deteriorate, and the physical and mechanical properties will drop sharply, increasing the yarn breakage rate and the probability of pilling and pilling. In order to solve these problems, low-friction plastic warp droppers have been developed. This new type of warp dropper is designed to solve the shortcomings of traditional stainless steel warp droppers. By optimizing the material and design, it reduces the friction on the yarn, while ensuring the accuracy of the stop detection, thereby improving the weaving efficiency and fabric quality.

The research and development and application of plastic warp droppers face some technical difficulties, including finding suitable companies to design, open molds and manufacture high-quality and low-cost plastic warp droppers, and solving the problem of large differences in physical properties between plastic warp droppers and stainless steel warp droppers. In addition, since the existing warp stop detection device of the loom is realized by conduction, and the plastic warp dropper cannot directly conduct electricity, it is necessary to research and develop a device that can realize the stop detection of the plastic warp dropper to ensure that this device can be used with the existing loom.

In summary, the working principle of the textile warp dropper is to realize mechanical or electrical detection by the fall of the warp dropper when the warp yarn breaks, start the loom to stop, and reduce the adhesion of the warp yarn, improve the weaving efficiency and fabric quality. With the development of technology, the research and development and application of low-friction plastic warp droppers have further optimized this process.