Pure polyester yarn is made of polyester staple fiber by spinning, and its staple fiber has different categories, from length, there are cotton type fiber, the length is about 37mm, there are medium length fiber, the length is 51mm-57mm, there are wool type fiber, the length is 75mm-105mm. There are fine denier fibers in the range of 1.5D, coarse denier fibers in the range of 5D, intermediate ones in the range of 3D, and of course finer ones such as 1D, and even ultra-fine fibers such as 0.1-0.5D.
Yarn is very fine such as in 50 60, good with fine denier fiber spinning, so easy to spin uniform, good dry, less hairiness, if the fiber is longer, can increase the holding force, strength is also better, spinning into the yarn feel fine, on the contrary, coarse denier yarn feel rough, better hairiness. And so on. When spinning polyester staple fiber yarn, it is important to specify how thick the fiber is, what the length is, and generally know where the staple fiber is from.
It has the characteristics of strong and durable, good elasticity, not easy to deformation, corrosion resistance, insulation, stiffness, easy to wash and dry quickly, etc. Polyester fabric has high strength and elastic recovery, therefore, its firm and durable, iron-free. Polyester fabric, not deformed, has good washable performance. The major varieties of polyester are staple fiber, stretch yarn, deformed yarn, decorative filaments, industrial filaments and various differentiated fibers.
1. by physical properties: high and low tensile, medium and medium tensile, low and medium tensile, high modulus, high modulus. 2. by post-processing requirements: cotton, wool, hemp, silk. 3. by application: clothing, cotton, decorative, industrial. 4. by function: cationic dyeable, moisture absorption, flame retardant, colored, anti-pilling, anti-static. 5. by fiber cross-section: shaped yarn, hollow yarn. Hollow yarn.