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Polyester printing and dyeing process

A printing and dyeing technology, polyester technology, applied in the field of polyester printing and dyeing technology, can solve the problems of polyester fabric adhesion, uneven dyeing, large color difference, etc., achieve the effect of reducing color flower and improving dyeing uniformity

Active Publication Date: 2021-06-25
SHANGHAI JINTANG TEXTILE NEW MATERIALS TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: polyester fabrics often have relatively large oil content during the weaving process, and polyester fabrics themselves are hydrophobic fabrics, so there are often more oil stains attached to polyester fabrics
[0006] Although the above method can reduce the possibility of color stains in the printing and dyeing process, in the process of alkali reduction treatment, sodium hydroxide attacks the ester group on the surface of polyester macromolecules and breaks them. As the reaction proceeds, polyester macromolecules continue to The bond falls off, and a large amount of PTA is precipitated, which will repolymerize and stick to the fabric, which will cause dyeing defects in the fabric during the dyeing process, such as uneven dyeing, large color difference, and white core phenomenon.

Method used

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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  • Polyester printing and dyeing process
  • Polyester printing and dyeing process
  • Polyester printing and dyeing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0033] 1. Compound tea saponin treatment

[0034] Add compound tea saponin to the water, add 30g of compound tea saponin per liter of water, and heat up to 100°C after the compound tea saponin dissolves; wherein the compound tea saponin is composed of bugong tea saponin and sodium silicate, silicon The consumption of sodium bicarbonate is 40wt% of bugong tea saponin, and the composition of bugong tea saponin is calculated by mass percent: nano-titanium oxide 1%, tea saponin 12%, methyl cellulose 1%, natural soap powder 23% %, 3% diatomite, 6% sepiolite, 5% sodium carbonate, and the rest is water; immerse the polyester fabric to be printed and dyed in the compound tea saponin solution at 100°C for 40 minutes, and the liquor ratio is 1:5.

[0035] Two, washing

[0036] The polyester fabric treated with compound tea saponin was washed with water.

[0037] 3. High temperature and high pressure dyeing

[0038]The polyester fabric after washing is placed in the dye solution, the ...

Embodiment 1-2

[0046] On the basis of Example 1-1, this embodiment also includes the step of recycling waste liquid, and its process flow chart is as follows figure 2 As shown, the process of waste liquid reuse is as follows:

[0047] The waste liquid produced after the compound tea saponin is processed on the polyester fabric in step 1 and the washing waste liquid in step 2 are recycled and filtered, and then enter the heat exchange system, and perform heat exchange with the normal temperature tap water entering the heat exchange system; the normal temperature tap water is passed through After the heat exchange, the temperature rises to 50°C, which is used as washing water in step 2; the temperature of the waste liquid drops to 50°C after heat exchange, and then further condenses to 8°C, and then adds dilute sulfuric acid with a concentration of 40vol% for acid analysis, acid analysis After finishing solid-liquid separation and filtering, store it as a solution used when compound tea sapon...

Embodiment 2-1

[0053] 1. Compound tea saponin treatment

[0054] Add compound tea saponin to the water, add 20g of compound tea saponin per liter of water, and heat up to 80°C after the compound tea saponin dissolves; wherein the compound tea saponin is composed of bugong tea saponin and sodium silicate, silicon The consumption of sodium bicarbonate is 25wt% of bugong tea saponin, and the composition of bugong tea saponin is calculated by mass percent: nano-titanium oxide 3%, tea saponin 18%, methyl cellulose 1%, natural soap powder 23% %, 3% diatomite, 12% sepiolite, 10% sodium carbonate, and the rest is water; immerse the polyester fabric to be printed and dyed in the compound tea saponin solution at 80°C for 20 minutes, and the liquor ratio is 1:3.

[0055] Two, washing

[0056] The polyester fabric treated with compound tea saponin was washed with water.

[0057] 3. High temperature and high pressure dyeing

[0058] The washed polyester fabric is placed in the dye solution, the dyestu...

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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Abstract

The invention belongs to the technical field of fabric pretreatment, and particularly relates to a polyester printing and dyeing process. The polyester printing and dyeing process comprises the following steps of treating a polyester fabric by using composite tea saponin, washing with water, and dyeing and post-treating, wherein the composite tea saponin comprises Bu gong(a Chinese brand name of saponin) tea saponin and silicate. According to the polyester printing and dyeing process provided by the invention, the compound tea saponin of the Bu gong tea saponin and silicate is selected, so that the conventional process flow of alkali liquor treatment, water washing, high-temperature and high-pressure disperse dyeing, reduction cleaning and water washing processing of the polyester fabric is broken through, and the process flow of treating, water washing, dyeing and post-treating the polyester fabric by the compound tea saponin is reconstructed; silicate contained in the composite tea saponin can effectively adsorb PTA and various molecular substances, so that the possibility that PTA and various molecular substances are adhered to the fabric after repolymerization is avoided, the dyeing uniformity of the fabric is improved, and the phenomena of dyeing defects and white cores in the dyeing process are reduced.

Description

technical field [0001] The invention belongs to the technical field of fabric pretreatment, and in particular relates to a polyester printing and dyeing process. Background technique [0002] Polyester is currently the most used variety of synthetic fibers in the world. In the process of polyester processing, the dyeing process is quite different from other fibers. This is because there are no reactive groups required for normal dye uptake on polyester fibers. Therefore, the dyeing of polyester often achieves the purpose of dyeing through the swelling of polyester fibers, and disperse dyes are immersed in polyester. [0003] For example, CN108978266A discloses a short process and method for printing and dyeing of all polyester fabrics. The preparatory steps before the printing and dyeing of all polyester fabrics and the preparation of clear water in the whole process of printing and dyeing required during printing and dyeing are to place all polyester fabrics on the goods i...

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): D06P3/52D06P1/44D06P1/673D06P5/00
CPCD06P3/52D06P1/445D06P1/67383D06P5/00
Inventor 张志君
Owner SHANGHAI JINTANG TEXTILE NEW MATERIALS TECHCO
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