Method for dyeing textile substrate containing residual oligomers

A dyeing method and oligomer technology, applied in dyeing, textiles and papermaking, etc., can solve the problems of reducing waste water discharge, equipment pollution, stain formation, etc., and achieve the effect of improving the degree of dyeing

Inactive Publication Date: 2019-12-31
FAR EASTERN NEW CENTURY COPRRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the textile process, a small amount of residual oligomers (residual oligomers) will be generated in the synthesis and spinning stages, and supercritical fluids can easily accelerate the leaching of residual oligomers in the high-temperature dye bath (dye bath) to On the surface of the fabric, color spots are often formed on the surface of the fabric during the supercritical fluid dyeing stage, and the residual oligomers are easy to aggregate with the dye and deposit on the inner wall of the dyeing tank, causing equipment pollution
[0003] The existing supercritical fluid dyeing process mostly removes the residual oligomers on the surface of the fabric by washing after the dyeing stage, but it also deviates from the demand for reducing wastewater discharge, and usually only removes about 15% to 25% of the residue oligomer

Method used

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  • Method for dyeing textile substrate containing residual oligomers
  • Method for dyeing textile substrate containing residual oligomers
  • Method for dyeing textile substrate containing residual oligomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The steps of the method of embodiment 1 are as follows:

[0023] (a) 10 g of polyester fabric (purchased from Far Eastern New Century Co., Ltd., model number 75 / 72 SDR) was wound on a stainless steel round rod.

[0024] (b) The microporous membrane of polytetrafluoroethylene (ePTFE, purchased from Yumingtai Chemical Co., Ltd., the model is STF-5126, the size is 15cm×15cm, the thickness is 35mm, and the pore diameter is 0.2-0.8μm) tightly and Completely wrap the polyester cloth covered on the above-mentioned round rod so that the polyester cloth is not exposed, and bind and fix it with cotton thread or nylon thread.

[0025] (c) Put the above-mentioned polyester cloth and microporous membrane fixed on the round rod into an autoclave with a volume of 1L, inject 150±3g of liquid carbon dioxide, heat to 120-130°C under the state of fluid disturbance, and pour Inject gaseous carbon dioxide and pressurize to 250-300bar to form supercritical carbon dioxide and maintain it for...

Embodiment 2 and Embodiment 3

[0028] The method of embodiment 2 and embodiment 3 is similar to embodiment 1, and difference is that in this step (b), respectively use polypropylene microporous membrane (PP, purchased from vanadium company, model is M-PP047N045I, size 15cm×15cm, thickness 47mm, pore diameter about 0.45μm) and polyurethane microporous membrane (PU, purchased from Jiyouli Company, model ITPUC035137, size 15cm×15cm, thickness 35mm, pore diameter 0.2-0.6μm ) to replace ePTFE in Example 1.

Embodiment 4 and Embodiment 5

[0030] The method of embodiment 4 and embodiment 5 is similar to embodiment 1, difference is that in this step (c), before injecting liquid carbon dioxide, embodiment 4 puts 0.05g disperse red 92 (Disperse Red 92) into hot Autoclave, Example 5 First put 0.05g of Disperse Blue 60 (Disperse Blue 60) into the autoclave.

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Abstract

A method of dyeing a textile substrate containing residual oligomers, and the method the steps: (a) attaching the fabric substrate to a mounting carrier to form a substrate carrier for supercritical dyeing in a autoclave; (b) covering a microporous membrane on the textile substrate of the substrate bearing seat, the pore size of the microporous membrane allows a supercritical fluid containing a dye to be allowed to pass through the microporous membrane to dye the textile substrate while the fabric substrate is dyed in the autoclave, while residual oligomers entrained by the supercritical fluidare blocked by the microporous membrane. According to the dyeing method of the textile substrate containing the residual oligomer, the dyeing degree of a dyeing agent can be improved, and the problemof wastewater discharge can be reduced.

Description

technical field [0001] The invention relates to a dyeing method of a fabric base material, in particular to a dyeing method of a fabric base material containing residual oligomers. Background technique [0002] In the dyeing process of fabrics (such as polyester cloth), the use of supercritical fluid dyeing instead of water dyeing can reduce the problem of wastewater discharge. However, in the textile process, a small amount of residual oligomers (residual oligomers) will be generated in the synthesis and spinning stages, and supercritical fluids can easily accelerate the leaching of residual oligomers in the high-temperature dye bath (dye bath) to On the surface of the fabric, color spots are often formed on the surface of the fabric during the supercritical fluid dyeing stage, and the residual oligomers are easy to aggregate with the dye and deposit on the inner wall of the dyeing tank, causing equipment pollution. [0003] The existing supercritical fluid dyeing process ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/54D06P1/16D06P1/94
CPCD06P1/16D06P1/94D06P3/54D06P5/001D06P3/52
Inventor 王赵增黄馨妘陈奕涵
Owner FAR EASTERN NEW CENTURY COPRRATION
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