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

A technology of polyester industrial yarn and creep resistance, applied in the field of spinning, can solve problems such as traffic accidents, elongation and deformation of tire frame, etc., and achieve the effects of reducing creep degree, increasing elastic modulus, and good mechanical properties

Active Publication Date: 2021-05-04
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As one of the cord materials, polyester industrial yarn has a close relationship between its creep phenomenon and its performance.

Method used

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

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Experimental program
Comparison scheme
Effect test

Example Embodiment

[0053]Example 1

[0054]Method for preparing high-strength creep polyester industrial filaments, specific steps are as follows:

[0055](1) Preparation of modified polyester;

[0056](1.1) esterification reaction;

[0057]Tobenipateic acid, ethylene glycol, and 2- (4-pyridine) of 1: 1.2: 0.03 were used as a slurry, add catalyst (trioxide) and stabilizer (triphenyl phosphate). The addition of mixing is uniform, the amount of the catalyst and the stabilizer is 0.01% by weight and 0.03% by weight of terephthalic acid added, and then the esterification reaction is performed in a nitrogen atmosphere, and the pressure pressure is 0.2 MPa, esterification reaction. The temperature is 259 ° C, and when the amount of the die in the esterification reaction reaches 96% of the theoretical value, it is the endpoint of esterification reaction;

[0058](1.2) polycondensation reaction;

[0059]After the esterification reaction, the polycondensation reaction of the low vacuum stage was started under negative pressure ...

Example Embodiment

[0075]Example 2

[0076]Method for preparing high-strength creep polyester industrial filaments, specific steps are as follows:

[0077](1) Preparation of modified polyester;

[0078](1.1) esterification reaction;

[0079]Tobenylene terephthalic acid, ethylene glycol, and 2- (4-pyridine) of 1: 1.5: 0.03 were used as a slurry, add catalyst (trioxide) and stabilizer (triphenyl phosphate). The addition of mixed uniform, the amount of the catalyst and the stabilizer is 0.01% by weight and 0.04% by weight of terephthalic acid added, and then the esterification reaction is performed in a nitrogen atmosphere, and the pressure pressure is 0.2 MPa, esterification reaction. The temperature is 260 ° C, and the end of the esterification reaction when the reflection in the esterification reaction reaches 96% of the theoretical value;

[0080](1.2) polycondensation reaction;

[0081]After the esterification reaction, the polycondensation reaction of the low vacuum stage was started under negative pressure conditio...

Example Embodiment

[0097]Example 3

[0098]Method for preparing high-strength creep polyester industrial filaments, specific steps are as follows:

[0099](1) Preparation of modified polyester;

[0100](1.1) esterification reaction;

[0101]Benzothylene terephthalic acid, ethylene glycol, and 2- (4-pyridine) of 1: 2.0: 0.03 were used as a slurry, add catalyst (trioxide) and stabilizer (trimethylate phosphate). The addition of mixing, the addition of the catalyst and the stabilizer is 0.02% and 0.05 wt% of terephthalic acid added, and then the esterification reaction is performed in a nitrogen atmosphere, and the pressure pressure is 0.3 MPa, esterification reaction. The temperature is 254 ° C, and the end point of the esterification reaction when the amount of the reflection in the esterification reaction reaches 95% of the theoretical value;

[0102](1.2) polycondensation reaction;

[0103]After the esterification reaction, the polycondensation reaction of the low vacuum stage was started under negative pressure condi...

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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 ...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/685C08G63/78
CPCD01F6/84C08G63/6856C08G63/78
Inventor 汤方明王山水王丽丽张烨魏存宏张玉梅赵艳丽
Owner JIANGSU HENGLI CHEM FIBER
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