Yarn twist knowledge

Yarn: A general term for yarn and thread, a thin, soft, continuous long strip made of textile fibers, including single yarns and strands.

Single yarn: It is processed by spinning short fibers, so that the short fibers or filaments are arranged in the axial direction and twisted.

Stranded yarn: It is made of two or more single yarns combined and twisted, and its strength and wear resistance are better than single yarns.

What is twisting?

If one end of the whisker is held and the other end is turned around, a yarn is formed, a process called twisting.

For short fibers, twisting is a necessary means to make fiber strips into yarns. Before twisting, it is generally necessary to condense loose fibers into fiber strips. After twisting, the outer fibers of the fibers are extruded to the inner layer to generate centripetal pressure. Thus, the whiskers obtain friction along the length of the fiber.

For filament yarns and strands, twisting can form a compact structure that is not easily damaged by lateral external forces, and twisting can also form textured yarns and fancy yarns. The amount of twist and the direction of twist not only affect the feel and appearance of the fabric, but also affect the inherent quality of the fabric.

After the sliver is twisted, the outer fibers of the sliver are twisted and twisted, the fibers are twisted and deformed, and the sliver is tightly interlocked, which changes the structural shape and mechanical and physical properties of the fiber collective.

When there is an encircling angle to the sliver, the fibers have centripetal pressure on the sliver, and the larger the encircling angle, the greater the centripetal pressure. Due to the existence of centripetal pressure, the outer layer fibers are squeezed to the inner layer, which increases the tightness of the sliver and the friction between the fibers, thereby changing the structure and physical and mechanical properties of the sliver, which is twisting. The essence of yarn.