High-strength creep-resistant polyester industrial yarn and preparation method thereof

Abstract

The invention relates to a high-strength creep-resistant polyester industrial yarn and a preparation method thereof. The preparation method comprises the following steps of carrying out solid phase polycondensation and tackifying on modified polyester, and then carrying out spinning winding and coordination treatment to obtain the high-strength creep-resistant polyester industrial yarn, wherein the coordination treatment is performed at 80-100 DEG C for 60-72 hours; a coordination agent is AgNO3, FeCl2, CuCl2 or NiCl2; a polyester chain segment of the prepared high-strength creep-resistant polyester industrial yarn comprises a terephthalic acid chain segment, an oxalic acid chain segment and a 2-(4-pyridine) terephthalic acid chain segment, and the 2-(4-pyridine) terephthalic acid chain segments of different polyester chain segments are coordinated through metal ions (Ag<+>, Fe<2+>, Cu<2+> or Ni<2+>); the molar ratio of the terephthalic acid chain segment to the 2-(4-pyridine) terephthalic acid chain segment is 1: (0.03-0.05); and an N atom on pyridine of the 2-(4-pyridine) terephthalic acid chain segment participates in coordination. According to the invention, the metal ions and 2-(4-pyridine) terephthalic acid are coordinated, so that the creep degree of polyester fiber is greatly reduced.

Description

technical field

[0001] The invention belongs to the technical field of spinning, and relates to a high-strength creep-resistant polyester industrial yarn and a preparation method thereof. Background technique

[0002] Polyester industrial yarn has excellent physical and mechanical properties such as high strength, high modulus, low elongation, impact resistance, fatigue resistance, good heat resistance, and the elongation value in wet state is basically the same as that in dry state. As one of the four major contemporary rubber skeleton materials (viscose, nylon, polyester, and steel wire), it has broad application prospects in vehicle tires, conveyor belts, conveyor belts, safety belts, and water hoses.

[0003] Under the action of constant temperature and constant stress, the deformation of polymer gradually increases with time, which is called creep. Creep is one of the main problems existing in organic fibers, and creep damage is also an urgent problem that needs to be ...

Images