Method for preparing colored polyester fibers through stock solution coloring

A coloring technology of colored polyester and stock solution, which is applied in the direction of adding pigments to single-component polyester artificial filaments and spinning solutions, which can solve the problem of single-variety and inability to solve the problem of uniform dispersion of multi-color pigments and polyester compatibility problems and other problems, to achieve the effect of simple equipment, excellent color fastness, and stable production

Active Publication Date: 2016-03-30
SHANGHAI JUYOU CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing polymerization process coloring method is mainly used in the mass continuous production of conventional black silk, and its disadvantages are: the variety is single, and it is impossible to carry out mass continuous production of multi-color systems
However, the prior art cannot solve the problem of uniform dispersion of multi-color pigments and compatibility with polyester

Method used

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  • Method for preparing colored polyester fibers through stock solution coloring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Put 1kg of Pigment Red 254 into the special reaction kettle, then add 9kg of water as a dispersion medium, add 0.06kg of tributyl phosphate as a stabilizer, and after fully dispersed, a uniformly dispersed low-viscosity red slurry is obtained; pass the red slurry through The slurry adding system is online metered and added to the oligomer conveying pipeline, after being uniformly mixed by the homogenizing system, it enters the pre-condensation kettle and the final polycondensation kettle to react respectively to obtain a red polyester melt with an intrinsic viscosity of 0.68dl / g (pigment mass Fraction is 0.75%), the red polyester melt is sent into the spinning box after passing through the melt pipeline for spinning to obtain PET fibers with a strength of 3.0cN / dtex and an elongation of 24%, and the color fastness to light>4 class.

Embodiment 2

[0033] Put 5kg of Pigment Red 185 into the special reaction kettle, then add 5kg of ethylene glycol as a dispersion medium, and add 0.1kg of trimethyl phosphate as a stabilizer. After fully dispersed, a uniformly dispersed red slurry is obtained; pass the red slurry through the slurry The material adding system is online metered into the oligomer conveying pipeline, after being mixed evenly by the homogenizing system, it enters the pre-condensation reactor and the final polycondensation reactor respectively to react to obtain a red polyester melt with an intrinsic viscosity of 0.87dl / g (mass fraction of pigment 1.5%), the red polyester melt is sent into the spinning box after passing through the melt pipeline for spinning to obtain a red polyester fiber with a strength of 2.8cN / dtex and an elongation of 20%, and the color fastness to light> level 4.

Embodiment 3

[0035]Put 1.75kg of Pigment Red 185 and 1.25kg of Pigment Yellow 191 into the special reaction kettle, then add 17kg of ethylene glycol as a dispersion medium, add 0.3kg of tributyl phosphate as a stabilizer, and after fully dispersed, a uniformly dispersed orange slurry is obtained ; The orange slurry is metered into the oligomer conveying pipeline through the slurry adding system online, after being uniformly mixed by the homogenization system, it enters the pre-condensation reactor and the final polycondensation reactor respectively to obtain an orange polymer with an intrinsic viscosity of 0.73dl / g. Ester melt (mass fraction of pigment is 1.5%), orange polyester melt is sent into the spin box body after melting pipe and is spun to obtain intensity and be 3.1cN / dtex, the orange polyester of elongation rate 21% Fiber, color fastness to light > grade 4.

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Abstract

The invention discloses a method for preparing colored polyester fibers through stock solution coloring. The method comprises steps as follows: organic pigments are added to liquid-state dispersion media containing a stabilizer and sufficiently dispersed, and uniformly dispersed colored slurry is obtained; the colored slurry is added to polyester oligomer, the mixture is uniformly mixed for prepolymerization and final polycondensation reactions, polyester melts are obtained and subjected to direct spinning through a spinning manifold, and the colored polyester fibers are prepared; or colored polyester chips are firstly prepared, single-color polyester chips or various polyester chips with different colors are mixed and then subjected to indirect spinning according to demands, and the colored polyester fibers with the required color are prepared. The prepared colored slurry is stable at the normal temperature and has good compatibility with polyester; the pigments are uniformly dispersed in a polymerization system; after spinning and forming of the melts, a coloring agent is fixed in the fibers, and the color fastness of the product is high; different batches of the colored polyester fibers or the same batch of the colored polyester fibers basically don't have color difference, and the method is particularly suitable for large-scale continuous production.

Description

technical field [0001] The invention belongs to the technical field of polyester fiber preparation, and relates to a method for preparing colored polyester fiber by dope coloring. Background technique [0002] In recent years, with the improvement of people's living standards, people's demand for high-quality colored fabrics has increased year by year. Although after years of development, my country has quickly become the world's largest producer of chemical fiber, but the main focus is on the expansion of conventional polyester production, the phenomenon of regularization and homogeneity is serious, there are serious deficiencies in product development and technological innovation, and product differences rate is much lower than that of developed countries. Therefore, it is of great significance to find a suitable method to continuously produce high-quality colored polyester fibers, which will help realize the industrial differentiation level of polyester fibers. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/04C08G63/78
CPCC08G63/78D01F1/04D01F6/92
Inventor 汪少朋甘胜华吴宝宅李红彬张学斌岳阳
Owner SHANGHAI JUYOU CHEM ENG
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