Method for preparing low-boiling-water fluffy chenille yarns

A boiling water and fluffy technology, applied in the field of polyester fibers, can solve the problems of high thermal shrinkage rate, crystal defects, and limit grain growth of industrial yarns, and achieve the effect of improving dyeing performance and improving softness

Active Publication Date: 2019-04-26
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing technology can also produce low-shrinkage polyester industrial yarn by controlling the overfeed rate and performing tension heat setting, the length of the fiber is fixed and cannot be changed during the tension heat setting process, which will inhibit the folding of the macromolecular chain and limit the crystallinity. The growth of grains leads to defects in crystallization, which will affect the high thermal shrinkage of industrial yarns

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method for fluffy chenille silk with low boiling water, the steps are as follows:

[0050] (1) prepare modified polyester;

[0051] (1.1) Esterification reaction;

[0052] Make a slurry of terephthalic acid, ethylene glycol and 5-tert-butyl-1,3-benzenedicarboxylic acid at a molar ratio of 1:1.2:0.03, add antimony trioxide, titanium dioxide and triphenyl phosphate and mix well Finally, the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressurized pressure is 0.3 MPa, and the temperature of the esterification reaction is 250 ° C. When the amount of water distilled in the esterification reaction reaches 90.1% of the theoretical value, it is an esterification reaction. At the end point, the additions of antimony trioxide, titanium dioxide and triphenyl phosphate are respectively 0.03wt%, 0.20wt% and 0.01wt% of the terephthalic acid addition;

[0053] (1.2) polycondensation reaction;

[0054] After the esterification rea...

Embodiment 2

[0069] A preparation method for fluffy chenille silk with low boiling water, the steps are as follows:

[0070] (1) prepare modified polyester;

[0071] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid: firstly mix tungstic acid and hydrogen peroxide, stir at room temperature for 10 minutes, then add 2-tert-butylcyclohexanol and firstly mix at 80°C React for 1 hour, then raise the temperature to 94°C and react for 2 hours. During the reaction, the reactants are always in a reflux state, and finally undergo cooling crystallization, washing and refining. The ratio is 1:35:120;

[0072] (1.2) Esterification reaction;

[0073] Make a slurry of terephthalic acid, ethylene glycol and 2-tert-butyl-1,6-hexanedicarboxylic acid at a molar ratio of 1:2.0:0.05, add antimony ethylene glycol, titanium dioxide and trimethyl phosphate and mix well Finally, the esterification reaction is carried out under normal pressure in a nitrogen atmosphere. The temperature of the esterifi...

Embodiment 3

[0081] A preparation method for fluffy chenille silk with low boiling water, the steps are as follows:

[0082] (1) prepare modified polyester;

[0083] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid: firstly mix tungstic acid and hydrogen peroxide, stir at room temperature for 12 minutes, then add 2-tert-butylcyclohexanol and firstly mix at 83°C React for 1.5 hours, then raise the temperature to 90°C and react for 2 hours. During the reaction, the reactants are always in a reflux state, and finally carry out cooling crystallization, washing and refining. The molar ratio is 1:33:120;

[0084] (1.2) Esterification reaction;

[0085] Make slurry with terephthalic acid, ethylene glycol and 2-tert-butyl-1,6-hexanedicarboxylic acid at a molar ratio of 1:1.5:0.04, add antimony acetate, titanium dioxide and trimethyl phosphite and mix well , carry out the esterification reaction under pressure in a nitrogen atmosphere, the pressurized pressure is 0.2 MPa, the temper...

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Abstract

The invention relates to a method for preparing low-boiling-water fluffy chenille yarns. The method comprises the following steps: processing modified polyester by a FDY process, additionally settinga relaxation thermal treatment process between a tension heat setting process and a winding process to obtain the low-boiling-water fluffy chenille yarns, wherein the molecular chain of the modified polyester comprises a terephthalic acid chain segment, a ethylene glycol chain segment and a binary acid chain segment with a tertiary butyl side radical; the relaxation thermal treatment means that polyester tows pass through a space at a certain temperature in a proper relaxed state, namely the winding overfeed ratio being 3.0-5.0 percent, and certain temperature is 200-240 DEG C. According to the method, the binary acid chain segment with the tertiary butyl side radical is modified, and the fiber dyeing performance is improved; the thermal treatment temperature and the relatively high overfeed ration are matched with each other, so that the completeness of fiber crystallization is improved, and thermal contraction of the fibers in the application process can be reduced. The preparation method has simple process, low cost and good application prospect.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers and relates to a method for preparing fluffy chenille silk with low boiling water. Background technique [0002] With the continuous expansion and development of polyester fiber production scale, polyester fiber and its products have been widely used in many fields, especially in the fields of clothing, luggage and industrial use. With the continuous development of the economy and the improvement of people's lives, people have higher and higher requirements for bags and clothing fabrics, which put forward higher requirements for the performance of polyester fibers. In addition, factors such as the price of raw materials, market supply and demand, equipment renewal and technological development have made the competition among domestic chemical fiber enterprises increasingly fierce. Enterprises have to update advanced equipment, introduce technology and talents, reduce product prices, optim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92C08G63/183C08G63/181
CPCC08G63/181C08G63/183D01F6/92
Inventor 范红卫王山水汤方明
Owner JIANGSU HENGLI CHEM FIBER
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