How does twisting affect the wear resistance of nylon yarn

In the textile industry, nylon yarn is widely used due to its excellent strength, wear resistance and excellent elasticity. However, specific application scenarios place higher demands on the wear resistance of nylon yarn. To meet these requirements, textile engineers use twisting as a key process to deeply treat nylon yarn to significantly improve its wear resistance.

Basic concept of twisting and wear resistance improvement mechanism
Twisting refers to the process of rotating the yarn to generate torque between the fibers, so that the fibers are more tightly combined. This process not only changes the internal structure of the yarn, but also significantly enhances its wear resistance. The improvement of the wear resistance of nylon yarn by twisting is mainly reflected in the following aspects:
Tight bonding between fibers: During the twisting process, the torque between the fibers forces them to be more tightly combined. This tight fiber structure effectively reduces the shedding of fibers on the yarn surface, thereby reducing the wear rate of the yarn during friction. In addition, the tight fiber structure can effectively resist friction and cutting by external objects, further improving the wear resistance of the yarn.
Uniform distribution of fibers: Twisting makes the distribution of fibers inside the yarn more uniform. This uniformity helps reduce stress concentration inside the yarn, allowing it to bear loads more evenly when subjected to friction, thereby extending the service life of the yarn. At the same time, evenly distributed fibers increase the overall strength of the yarn, making it more resistant to friction damage.
Axial arrangement of fibers: Twisting causes the fibers to be neatly arranged axially inside the yarn. This arrangement helps improve the axial wear resistance of the yarn, making it more effectively resistant to wear when subjected to axial friction. In addition, the axially arranged fibers can effectively disperse the heat generated by friction and prevent the yarn from being damaged by overheating.

Relationship between twist degree and wear resistance
The degree of twist has a significant effect on the wear resistance of nylon yarn. Moderate twisting can effectively improve the wear resistance of the yarn, but excessive twisting may cause the yarn to become too tight and stiff, which in turn reduces its wear resistance. This is because excessive twisting makes the fibers inside the yarn too tightly arranged, increasing the friction between the fibers, thereby accelerating the wear of the yarn.

In practical applications, it is crucial to choose the appropriate degree of twist, which needs to be adjusted according to the specific requirements and process conditions of the product. Generally, for applications that need to withstand high friction, such as sports equipment and outdoor products, it is recommended to choose nylon yarn with moderate twist to improve its wear resistance. For some applications that require high softness and comfort, such as underwear and bedding, the twist degree should be controlled to avoid the yarn being too stiff.