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Melt direct spinning on-line adding colored polyester fiber and its preparation method

A technology of melt direct spinning and colored polyester, which is applied in the field of polyester fiber, can solve the problems of poor degradation effect and slow degradation rate, and achieve the effects of increasing degradation rate, increasing void free volume, and increasing natural degradation rate

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

[0006] The purpose of the present invention is to overcome the defects of slow degradation rate and poor degradation effect of colored polyester fibers in the prior art, and provide a method for improving the degradation rate and degradation effect of polyester by modifying polyester, and using the Modified polyester to prepare melt direct spinning with good mechanical properties and low intrinsic viscosity, adding colored polyester fiber online

Method used

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  • Melt direct spinning on-line adding colored polyester fiber and its preparation method
  • Melt direct spinning on-line adding colored polyester fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The preparation method of adding colored polyester fiber on-line by melt direct spinning, the steps are as follows:

[0059] (1) prepare modified polyester;

[0060] (1.1) prepare 2,5,6,6-tetramethyl-2,5-heptanediol, the synthetic method is:

[0061] (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;

[0062] (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);

[0063] (1.2) Esterification reaction;

[0064]...

Embodiment 2

[0075] The preparation method of adding colored polyester fiber on-line by melt direct spinning, the steps are as follows:

[0076] (1) prepare modified polyester;

[0077] (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;

[0078] (1.2) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol, the synthesis method is:

[0079] (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...

Embodiment 3

[0089] The preparation method of adding colored polyester fiber on-line by melt direct spinning, the steps are as follows:

[0090] (1) prepare modified polyester;

[0091] (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;

[0092] (1.2) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol, the synthesis method is:

[0093] (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, ce...

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Abstract

The invention relates to melt direct-spinning online added colored polyester fibers and a preparation method thereof. The preparation method comprises the following steps: combining a melt direct-spinning online adding process with a FDY process and preparing the melt direct-spinning online added colored polyester fibers from a modified polyester melt according to the combined process; and addingcolor masterbatch online into the modified polyester melt in the melt direct-spinning process, wherein the prepared melt direct-spinning online added colored polyester fibers are modified polyester FDY yarns, and molecular chains of the modified polyester comprise a terephthalic acid chain section, an ethylene glycol chain section, a binary acid chain section with a tertiary butyl side group, a fluorine-containing binary acid chain section and a 2,5,6,6-tetramethyl-2,5-heptandiol chain section. The preparation method is simple. By modifying the polyester by means of the fluorine-containing binary acid, the binary acid with the tertiary butyl side group and the 2,5,6,6-tetramethyl-2,5-heptandiol, the hydrolysis rate of the polyester is improved, the natural degrading performance of the polyester fibers is improved, and the prepared product is excellent in mechanical property.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a melt direct spinning online adding colored polyester fiber and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a polymer with excellent properties. PET is widely used in fibers, bottles because of its advantages such as high modulus, high strength, good shape retention and good barrier properties. In the fields of packaging, film and sheet materials, the output is increasing year by year, and the industry status has been significantly improved. [0003] At present, the fiber coloring in the textile industry mainly adopts post-finishing dyeing after weaving. Ordinary polyester staple fibers can be dyed with disperse dyes, but it can only be done under high temperature and high pressure or the presence of carriers, which will cause great damage to the fibers, poor light fastness, washing and ironing fastness of dyeing, and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01F1/04C08G63/86C08G63/682
Inventor 杨超明尹立新王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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