Core-spun yarn refers to a composite yarn composed of core yarn and sheath yarn; generally, filament yarn is used as core yarn, and staple fiber yarn is used as outer fiber yarn. Its characteristic is that through the combination of outer fiber yarn and core yarn, the advantages of each can be brought into play, the deficiencies of both sides can be made up, and the structure and characteristics of the yarn can be optimized by taking advantage of their strengths and avoiding their weaknesses. Compared with staple yarn

, filament yarn generally has the advantages of uniform yarn, high strength, good elongation and elasticity, and is suitable for being the backbone of core-spun yarn, so that the yarn strength, good elasticity and special filament yarn functions can be fully utilized. Staple fiber yarn is the outer fiber of core-spun yarn, which can give full play to the functions and appearance effects of fiber, such as the luster and beauty of new fiber, excellent water absorption, hygroscopicity, heat resistance, warmth retention, softness, anti-pilling and other excellent characteristics of fiber. The combination of the two can produce core-spun yarn that is incomparable to general staple yarn and filament yarn. Such as elastic core-spun yarn, high-strength, high-modulus, high-temperature resistant sewing core-spun yarn, burnt-out core-spun yarn, hollow core-spun yarn functionality, high-functional core-spun yarn, etc. In addition, the combination of two fibers and core-spun yarn are often beneficial to spinnability and weavability. For example, stainless steel conductive fiber cannot be spun due to the generation of open flames, but it can be used as core yarn to make core-spun yarn, which can also play the role of conducting electricity and shielding electromagnetic waves. The weavability of core-spun yarn is generally better than that of filament yarn. The core-spun yarn is configured with a suitable blending ratio of two fibers, which can also save raw material costs and spinning costs.