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Preparation method of uniformly dyed PBT high stretch yarn

A high-elasticity and uniform technology, applied in the field of PBT, can solve the problem of difficult to obtain uniform dyed finished products, and achieve the effect of good color fastness, easy diffusion and uniform dyeing

Inactive Publication Date: 2015-11-25
TAICANG HONGYI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When PBT is dyed with disperse dyes, it can be colored at 100°C under normal pressure. However, when PBT is dyed with most disperse dyes, it is difficult to obtain finished products with uniform dyeing and good color fastness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put terephthalic acid and 1,4-butanediol in a desiccator and dry at 130°C for 3 hours; weigh the dried terephthalic acid and 1,4-butanediol into the esterification reactor, where , the molar ratio of terephthalic acid to 1,4-butanediol is 1:2, adding tetrabutyl titanate whose mass is 0.02% of terephthalic acid mass and 0.8% of terephthalic acid mass Dimethyl phthalate-5-sodium sulfonate, the temperature is controlled at 230°C for esterification reaction for 2 hours; the reaction product is placed in a polycondensation kettle, the reaction temperature is controlled at 350°C, and the polycondensation reaction is carried out with stirring under vacuum for 3 hours to prepare PBT polyester; slice PBT polyester and dry it at 160°C to obtain PBT polyester slices; then put PBT polyester slices into a screw extruder to extrude, filter, add a mixture of cationic dyes and disperse dyes for dyeing , wherein the dyeing temperature is 100°C, the dyeing time is 1h, the mass ratio of c...

Embodiment 2

[0026]Put terephthalic acid and 1,4-butanediol in a desiccator and dry at 130°C for 3 hours; weigh the dried terephthalic acid and 1,4-butanediol into the esterification reactor, where , the molar ratio of terephthalic acid to 1,4-butanediol is 1:3, adding tetrabutyl titanate whose mass is 0.04% of terephthalic acid mass and 0.6% of terephthalic acid mass Dimethyl phthalate-5-sodium sulfonate, the temperature is controlled at 230°C for esterification reaction for 2 hours; the reaction product is placed in a polycondensation kettle, the reaction temperature is controlled at 350°C, and the polycondensation reaction is carried out with stirring under vacuum for 3 hours to prepare PBT polyester; slice PBT polyester and dry it at 170°C to obtain PBT polyester slices; then put PBT polyester slices into a screw extruder to extrude, filter, add a mixture of cationic dyes and disperse dyes for dyeing , where the dyeing temperature is 120°C, the dyeing time is 1.5h, and the mass ratio o...

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Abstract

The invention discloses a preparation method of uniformly dyed PBT high stretch yarn. The preparation method comprises the following steps: (1) putting terephthalic acid and 1,4-butanediol into an esterification reactor, adding tetrabutyl titanate, dimethyl isophthalate-5-sodium sulfonate for reaction, putting the reaction product into a polycondensation reactor, and carrying out vacuum stirring for polycondensation, so as to prepare PBT polyester; (2) slicing the PBT polyester, and drying the PBT polyester slices into dried PBT polyester slices; (3) putting the dried PBT polyester slices into a screw extruder for extrusion, carrying out filtration, and adding a mixture of cationic dye and disperse dye for dyeing; (4) putting the dyed PBT into a screw spinning machine for melt spinning, carrying out cooling, oiling, balancing, wire coiling and stretching, carrying out false twisting with a false twister, carrying out heating for deformation, so as to obtain spiral coils of the uniformly dyed PBT high stretch yarn. The PBT high stretch yarn prepared according to the preparation method is uniformly dyed and high in color fastness.

Description

technical field [0001] The invention relates to the technical field of PBT, in particular to a method for preparing uniformly dyed PBT high elastic yarn. Background technique [0002] Polybutylene terephthalate (PBT), belonging to the polyester series, also known as thermoplastic polyester plastics, PBT fibers are made of high-purity terephthalic acid or terephthalic acid and 1,4-butanediol The linear polymer polycondensed after esterification, the fiber obtained by melt spinning, belongs to a kind of polyester fiber. PBT has excellent comprehensive properties, such as high crystallinity, rapid prototyping, weather resistance, low friction coefficient, high heat distortion temperature, good electrical properties, excellent mechanical properties, fatigue resistance, and ultrasonic welding. With its excellent comprehensive performance, PBT has been widely used in the fields of electronic appliances, automobile industry, machinery, instrumentation and household appliances, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/06C08G63/183
Inventor 陆国强
Owner TAICANG HONGYI CHEM FIBER
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