- Polyester: The first largest variety of synthetic fiber.
There are several trade names: the British name for the polyester is “Terylene”; the US for the polyester is called “Dacron”; “Polyester” is the Chinese name.
Structure and properties: The structure is determined by spinneret holes. The cross-section of conventional polyester fibers is round, and there is no cavity. Fiber macromolecule has high crystallinity and orientation, so it has high strength (20 times as much as viscose fiber), good elasticity, wrinkle resistance, good shape retention, good light resistance and heat resistance, fast drying and no ironing after washing, and good washability and wearability. Polyester fibers are stable to general chemical reagents and acid-resistant, but need not be treated with high humidity of concentrated alkali. Using this property to process polyester fibers, the surface of the fibers is corroded, the weight is reduced, the fineness becomes finer, and the silk style can be produced (that is, one of the methods of silk simulation). This method is called alkali reduction treatment. Polyester fibers have poor hygroscopicity, poor air permeability and sweat absorption, and have a sultry feeling when wearing. At the same time, its dyeability is also poor. Special dyes or equipment are needed to dye under high humidity and pressure in order to improve its dyeability. At present, there are cationic dyeable polyester fibers on the market. If you want to improve the wearability of polyester fibers, you can use polyester blended with other natural fibers (such as cotton) or regenerated cellulose fibers (such as viscose).