Preparation method of polyester industrial yarn for traction belt

A technology of polyester industrial yarn and traction belt, which is applied in the field of modified polyester fiber, can solve the problems that the performance of polyester traction belt such as friction resistance and fatigue resistance is difficult to further improve, and achieve the effect of reducing thermal shrinkage rate and eliminating shrinkage

Active Publication Date: 2020-10-16
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, the material of the traction belt is usually polyester. In the process of using polyester industrial yarn to prepare the traction belt, in order to further enhance the performance of the traction belt, such as friction resistance and fatigue resistance, people often need to use polyester industrial yarn. The prepared fiber is subjected to sizing treatment and finishing agent finishing, through the -NH contained in the sizing agent or finishing agent 2 , -OH, -COOH are combined with -OH, -COOH of polyester fiber to improve the adhesion with sizing agent or finishing agent. Parallel, most of them are in trans conformation, while the amorphous region is mostly in cis conformation, the molecular arrangement is quite tight, and the polyester molecular structure is relatively regular. Most of the polar groups can only be combined with -OH on the surface of polyester fibers, and it is difficult to further improve the friction resistance and fatigue resistance of polyester traction belts

Method used

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  • Preparation method of polyester industrial yarn for traction belt
  • Preparation method of polyester industrial yarn for traction belt
  • Preparation method of polyester industrial yarn for traction belt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The preparation method of the polyester industrial yarn for traction belt, the steps are as follows:

[0066] (1) prepare modified polyester;

[0067] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0068] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1:1:1.2:2.0, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0069] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0070] (1.2) Esterification reaction;

[0071] Make a sl...

Embodiment 2

[0084] The preparation method of the polyester industrial yarn for traction belt, the steps are as follows:

[0085] (1) prepare modified polyester;

[0086] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0087] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.1:1:1.2:2.3, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0088] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 45°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0089] (1.2) Esterification reaction;

[0090] Make a ...

Embodiment 3

[0098] The preparation method of the polyester industrial yarn for traction belt, the steps are as follows:

[0099] (1) prepare modified polyester;

[0100] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0101] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.2:1:1.25:2.0, and place in an ice bath Under the conditions of reaction for 3 hours, after the reaction is completed, cooling and crystallization, centrifugation, washing, refining and drying are carried out to obtain octyne diol;

[0102] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 3:10:0.03, react at 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0103] (1.2) Esterification reaction;

[0104] ...

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Abstract

The invention relates to a preparation method of a polyester industrial yarn for a traction belt. The preparation method comprises the steps of carrying out solid-phase condensation polymerization tackifying, melting, metering, extrusion, cooling, oiling, stretching, heat shaping, slack heat processing and winding on a modified polyester melt, so as to obtain the polyester industrial yarn for thetraction belt. Modified polyester is prepared by the steps of uniformly mixing terephthalic acid, glycol, dihydric alcohol with a silicon-containing main chainand 2,5,6,6-tetramethyl-2,5-heptanediol,and sequentially carrying out esterification reaction and condensation polymerization reaction. The dry heat shrinking rate of the prepared polyester industrial yarn is 2.0%-3.0% at a condition of 177DEG C*10min*0.05cN / dtex, and the antifriction frequency value is more than or equal to 2500, the antifriction frequency value is the reciprocating frequency of the traction belt under a reciprocatingfriction effect when the tensile strength begins to be smaller than 80% of the initial tensile strength. The method is simple in process, and the traction belt prepared from the polyester industrialyarn is excellent in wear resistance and low in thermal shrinkage rate.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to a method for preparing polyester industrial yarns used for traction belts. Background technique [0002] Traction belt drive is a relatively traditional transmission method, which is characterized by large pulling force and slow transmission. The traction belt is combined with scientific formula, which has the advantages of high strength, high tensile force, good wear resistance and high peel strength. [0003] Although the structure of the traction belt is simple, the physical index requirements are very high. Some traction belts will be used in high temperature environment, and the traction belts will be used repeatedly. The latitudinal tension maintained by the high temperature setting will soon disappear, and the traction belts will have different degrees of latitudinal shrinkage, which will cause the traction belt cloth surface to produce cracks. Wrinkles, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/695
Inventor 汤方明王雪王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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