polyester? The difference between polyester and polyester fiber. The characteristics of polyester:
1. High strength. The strength of
staple fiber is 2.6~5.7cN/dtex, and the high-strength fiber is 5.6~8.0cN/dtex. Due to its low hygroscopicity, its wet strength is basically the same as that of dry strength. The impact resistance is 4 times higher than nylon and 20 times higher than viscose fiber.
2. Good elasticity.
elasticity is close to wool, and when elongated by 5% to 6%, it can almost completely recover. Wrinkle resistance is greater than other fibers, that is, the fabric does not wrinkle and has good dimensional stability. Polyester fabrics have high strength and elastic recovery capabilities, so they are firm and durable, wrinkle-resistant and hot-free.
3. The polyester has a smooth surface.
The internal molecules are arranged closely. Polyester is the best heat-resistant fabric among synthetic fiber fabrics. It is thermoplastic and can be made into pleated skirts with long-lasting pleats. At the same time, polyester fabric has poor melt resistance and is prone to holes when it encounters smoke, Mars, etc. Therefore, when wearing it, try to avoid contact with cigarette butts, sparks, etc.
4. Heat resistance.
polyester is made by melt-spinning method, and the formed fibers can be melted by heating and are thermoplastic fibers. Polyester has a relatively high melting point, while its specific heat capacity and thermal conductivity are smaller, so the heat resistance and thermal insulation of polyester fibers are higher. It is the best synthetic fiber.
5. Good light resistance.
light resistance is second only to acrylic. Polyester fabrics have better light resistance, and in addition to being worse than acrylic, their sun resistance is better than natural fiber fabrics. Especially the sun resistance behind the glass is very good, almost comparable to acrylic.
6. Good wear resistance.
wear resistance is second only to nylon, which has the best wear resistance, and is better than other natural fibers and synthetic fibers.
The difference between polyester and polyester fiber
Many people think that polyester and polyester fiber are two different things, but in fact, both refer to the same raw materials. Polyester fiber is a common title in the world, mainly because it is famous for its earliest product name, and now it has become a common title in the world; polyester fiber is a Chinese title, and polyester fiber in China is generally polyester. The basic constituent substance of polyester is polyethylene terephthalate, with a molecular formula [-OC-Ph-COOCH2CH2O-]n, so it is also called polyester fiber (PET). The chemical structure of its long-chain molecules is H (OCH2CCOCO) NOCH2CH2OH, and its relative molecular weight is generally around 18,000~25,000. In fact, there are also a small amount of monomers and oligomers present. These oligomers have a low degree of polymerization and are also present in a ring form. Polyethylene terephthalate can be made by polycondensation of ethylene terephthalate (PTA) and ethylene glycol (EG) by direct esterification.
From the perspective of polyester molecular composition, it is composed of short aliphatic hydrocarbon chains, ester groups, benzene rings, and terminal alcohol hydroxyl groups. Except for the two terminal alcohol hydroxyl groups in the polyester, there are no other polar groups, so the polyester fiber is extremely poor in hydrophilicity. Polyester molecules contain about 46% ester groups. The ester groups can hydrolyze and thermally crack at high temperatures. When they encounter alkali, they will dissolve soap, reducing the degree of polymerization. Polyester molecules also contain aliphatic hydrocarbon chains, which can make the polyester molecules have a certain flexibility. However, because there are benzene rings that cannot be rotated internally in the polyester molecules, the polyester macromolecules are basically rigid molecules, and the molecular chains are easy to maintain linear shape. Therefore, polyester macromolecules can easily form crystallization under this condition, so the crystallinity and orientation of polyester are relatively high.
Polyester shirt washing should pay attention to the following points:
1. You can use various washing powder and soap to wash your shirt.
2. When washing polyester shirts, the temperature is below 45 degrees Celsius.
3. Polyester shirts can be machine-washed, hand-washed, dry-cleaned, and can be thrown dry.
4. Polyester shirts can be brushed with a brush. Be careful not to brush too hard, as they will cause excessive stretching of the clothes and cause an irrecoverable state.
5. It is easy to dry the shade after washing and should not be exposed to the sun to avoid wrinkles due to heat;
6. When ironing, add a wet cloth, and the temperature should not be too high. It is best to burn the back of dark clothes.