What are the characteristics and uses of polyester

Update date:2022-01-18

1. High strength: The strength of the polyester fiber i […]

1. High strength: The strength of the polyester fiber is nearly 1 times higher than that of cotton and 3 times higher than that of wool. Due to its low hygroscopicity, its wet strength is basically the same as its dry strength. The impact strength is 4 times higher than that of nylon and 20 times higher than that of viscose fiber.
2. Good elasticity: the elasticity is close to that of wool, and it can be almost completely recovered when the elongation is 5%~6%. Polyester fabric has high strength and elastic recovery ability, so the fabric does not wrinkle, has good dimensional stability, and is strong and durable.
3. Good heat resistance: Polyester is a thermoplastic fiber with a relatively high melting point and can be used at 70~170 ° C, while the specific heat capacity and thermal conductivity are small, so the heat resistance and thermal insulation of polyester staple fibers are the highest in synthetic staple fibers. OK.
4. Good thermoplasticity and poor melting resistance: polyester has the best heat resistance among synthetic fabrics due to its smooth surface and tight internal molecular arrangement. At the same time, the anti-melting resistance is poor, and the polyester fabric is easy to forms holes when it encounters soot and sparks.
5. Good abrasion resistance: The abrasion resistance of polyester staple fiber ranks second among synthetic fibers, second only to nylon with the best abrasion resistance.
6. Corrosion resistance: It is resistant to bleaching agents, oxidants, hydrocarbons, ketones, petroleum products, and inorganic acids, as well as strong acid and alkali resistance and UV resistance.
7. The dyeability is poor, but the color fastness is good, and the color is not easy to fade: because there is no specific dyeing group on the polyester molecular chain, and the polarity is small, it is difficult to dye, the dyeability is poor, and the dye molecules are not easy to enter the fiber.
8. Poor hygroscopicity and air permeability: Polyester fabrics feel stuffy when wearing, easy to carry static electricity, stained with dust, affecting the appearance and comfort, but easy to wash and dry, not deformed.
Polyester has a wide range of uses, mainly used in the cotton spinning industry, spinning alone or blending with cotton, viscose, hemp, wool, nylon, etc. The resulting yarn is mainly used for clothing weaving, and can also be used for home improvement fabrics, packaging. Cloth, padding, and insulation. Because of its permanent flame retardancy, flame retardant polyester plays an irreplaceable role in industrial textiles, building interior decoration, vehicle interior decoration, etc., and also plays a lot of roles in the field of protective clothing. In addition to pure flame-retardant polyester, it can also produce multi-functional products such as flame-retardant, low-melting-point, water-repellent, anti-ultraviolet, anti-static, and silicon according to the special requirements of users.