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A kind of method for preparing black polyester fiber by dope coloring

A polyester fiber, dope dyeing technology, applied in the direction of one-component polyester rayon filament, etc., can solve the problems of unstable quality between batches, low product color fastness, uneven melt mixing, etc. Performance, wide range of sources, effects of improving compatibility

Active Publication Date: 2016-05-25
SHANGHAI JUYOU CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The bath dyeing method is relatively mature, but the color fastness of the product is low, the quality between batches is unstable, and there is a certain degree of color difference between batches and within batches. It is only suitable for small batch production, and the processing process is long and costly. A large amount of sewage, serious environmental pollution
The disadvantage of the masterbatch coloring method is that the masterbatch needs to be dried in advance, the release of color is slow, and the problem of color difference caused by uneven mixing with the melt is prone to occur

Method used

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  • A kind of method for preparing black polyester fiber by dope coloring

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Put 3kg of rubber carbon black N110 into the special reaction kettle, then add 10kg of water as the dispersion medium, after fully grinding, slowly heat to boiling, then add the graft compound ethylene terephthalate and add an appropriate amount of catalyst titanium glycol , fully reacted at a temperature of 250°C and under constant stirring to obtain a uniformly dispersed low-viscosity carbon black slurry; add the carbon black slurry to polyethylene terephthalate on-line through the slurry addition system In the oligomer conveying pipeline, after being uniformly mixed by the homogenizing system, it enters the pre-condensation reactor and the final polycondensation reactor to react to obtain a black polyester melt with an intrinsic viscosity of 0.68dl / g (the mass fraction of carbon black is 1.5%), black After the polyester melt passes through the melt pipe, it is sent into the spinning box for spinning to obtain PET fibers with a strength of 3.5cN / dtex and an elongation ...

Embodiment 2

[0035] Put 5kg of pigment carbon black R330 into the special reaction kettle, then add 12kg of water as the dispersion medium, after fully grinding, slowly heat to boiling, then add the graft compound propylene glycol terephthalate, and add an appropriate amount of catalyst tetraethyl titanate , fully reacted at a temperature of 240°C and under constant stirring to obtain a uniformly dispersed low-viscosity carbon black slurry; add the carbon black slurry to the polytrimethylene terephthalate oligomerization system through the slurry addition system online In the material delivery pipeline, after being uniformly mixed by the homogenization system, it enters the pre-condensation reactor and the final polycondensation reactor respectively to obtain a black polyester melt (the mass fraction of carbon black is 1.2%) with an intrinsic viscosity of 0.93dl / g. After the melt passes through the melt pipe, it is sent into the spinning box for spinning to obtain a polytrimethylene terepht...

Embodiment 3

[0037]Put 5kg of rubber carbon black N332 into the special reaction kettle, then add 70kg of water as the dispersion medium, after fully grinding, slowly heat to boiling, then add the graft compound butylene terephthalate, and at the same time add an appropriate amount of catalyst tetratitanate Propyl ester, fully reacted at a temperature of 230°C and under constant stirring to obtain a uniformly dispersed low-viscosity carbon black slurry; add the carbon black slurry to polybutylene terephthalate on-line through the slurry addition system In the alcohol ester oligomer delivery pipeline, after being uniformly mixed by the homogenizing system, it enters the pre-condensation reactor and the final polycondensation reactor respectively to obtain a black polyester melt with an intrinsic viscosity of 1.2dl / g (the mass fraction of carbon black is 1.6%) , the black polyester melt is sent to the spinning box after passing through the melt pipeline for spinning to obtain polybutylene ter...

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Abstract

The invention discloses a method for preparing a black polyester fiber by dope dyeing, which comprises the following steps: adding a black pigment carbon black into a liquid dispersion medium, sufficiently grinding, then adding a compound capable of being subjected to chemical reaction with surface groups of the carbon black, and performing grafting reaction at a certain temperature in the presence of a catalyst to obtain a uniformly dispersed black slurry; and adding the black slurry into a polyester oligomer, uniformly mixing, then performing pre-polycondensation and final polycondensation reaction to obtain a polyester molten mass, and performing direct spinning on the molten mass through a spinning manifold to obtain the black polyester fiber. According to the method disclosed by the invention, the prepared black slurry is stable at normal temperature and is favorably compatible with the polyester; the pigment is uniformly dispersed in the polymerization system; dyestuff is fixed to the fiber after the spinning formation of the molten mass, so that the product is high in color fastness; and almost no color difference exists among inter-batch and intra-batch products, thus being especially suitable for large-batch continuous production. Thus, the method disclosed by the invention is of great importance for improving the current polyester differentiation rate level in China and solving the pollution problem caused by after stain of the fiber.

Description

technical field [0001] The invention belongs to the technical field of polyester fiber preparation, and relates to a method for preparing black 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 black 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 black polyester fiber, which will not only help realize the industrialization of black polyester fiber, but also help to i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92C08G63/183C08K9/04C08K3/04
Inventor 汪少朋甘胜华卢俨俨李红彬张学斌吴宝宅
Owner SHANGHAI JUYOU CHEM ENG