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Polyester fiber properties

Edit:Jiaxing Beimon Trading Co.,LtdUpDate:Jun 18, 2018

1. Morphological characteristics and surface properties of polyester fiber Polyester fiber is melt-spun, circular in cross-section, and smooth in surface, so that the contact area is small when the fiber slides relatively, the friction coefficient is high, and oil must be added during spinning. The agent controls the static friction coefficient of the fiber and the conductive properties of the fiber. In order to improve the spinnability of the fiber, it is also necessary to appropriately crimp the fiber. Special-shaped spinning holes can also be used to produce shaped or hollow fibers of various shapes to improve the appearance effect and fabric style of polyester fibers. Polyester surface and rubber adhesion is low, in order to improve the adhesive strength of polyester cord and rubber, can be made of nylon for the skin, polyester core composite fibers to improve the tire cord and rubber tire adhesion.

2. Hygroscopicity and dyeing properties of polyester fiber The hygroscopicity of polyester fiber is very poor. Under normal conditions, the moisture regain is 0.4% to 0.5%, and the relative humidity is 100%, and the rewetting rate is 0.6% to 0.8%. Dry and wet fiber performance does not change much. Since the polyester fiber has no hydrophilic groups and the molecules are tightly packed, it is difficult for the dye molecules to enter the interior of the fiber and the dyeing cannot be performed by general methods. Conventional polyester-modified polyesters, or additives such as calcium terephthalate, are added to the polyester to reduce the friction coefficient to prevent pilling, and surface treatments can also be used to increase the pilling resistance of the fibers.

In addition, antistatic and flame-retardant polyester fibers can also be modified to produce antistatic polyester fibers by adding antistatic additives; use of phosphine-halogen compound flame retardants or 2,5-difluorofluoride pairs Phthalic acid is used as a synthetic polyester monomer to improve flame resistance. High-shrinkage polyester is also a new polyester modified type. When the polyester segment is embedded in a soft segment or a normal segment, the stress is high when the structure is in a low-orientation and weak-crystal structure. Relaxation, the binding force of the secondary bond between molecules stretches, resulting in the transition of the molecular chain from a high-order state to a low-order state, resulting in a thermal shrinkage effect, thereby giving the fiber a greater potential for shrinkage. The use of highly shrinkable polyester yarns in fabrics is interwoven with low shrinkage polyester yarns to give the fabric a concave-convex texture and a three-dimensional pattern. Two different shrinkable polyester yarns can be used as the thread.