Method for recycling colored polyester fabric

A polyester fabric and colored polyester technology, applied in the field of waste fabric resource utilization, can solve the problems of equipment protection, high water consumption, high energy consumption, etc., and achieve the effects of small strength loss, small water consumption, and low energy consumption

Active Publication Date: 2021-07-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problems of high energy consumption, high water consumption, high pollution, high emission and personnel and equipment protection exi

Method used

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  • Method for recycling colored polyester fabric

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1:

[0043] Decolorization: Use C.I. Disperse red 167 with o.W.f of 2% dyed polyester knitted polyester knitted.

[0044] The non-colored polyester fabric is decolorized by the following method:

[0045] (1) Rolling Process: Place the dye polyester fabric in a 2 g / L dimethyl sulfoxide solution of pH 5 to impregnate, rolled, so that the liquid level is 100%.

[0046] (2) Decolorization Process: Place a weapon-liquid fabric in the reactor, ozone is input by one end, the exhaust gas is output from one end, the ozone pass rate in the reactor is 8 g / h, the treatment temperature is 25 ° C, decolorization Time is 3h.

[0047] (3) Post-processing procedure: Decolorizing the removal of the fabric, washed 3 times in water at a water temperature of 50 ° C, dried.

[0048] According to the colored polyester fabric color after the process, the color polyester fabric is obvious, and the K / S and the K / S before and after the decolor is measured, and [k / s " 脱色样 -K / s 原样 )...

Example Embodiment

[0049] Example 2:

[0050] Decolorization: Use C.I. Disperse red 167 with o.W.f of 2% dyed polyester knitted polyester knitted.

[0051] The non-colored polyester fabric is decolorized by the following method:

[0052] (1) Rolling Process: Place the dye polyester fabric in a 2 g / L hypochlorite solution of pH 5, so that the liquid is 100%.

[0053] (2) Decolorization Process: Place a weapon-liquid fabric in the reactor, ozone is input by one end, the exhaust gas is output from one end, the ozone pass rate in the reactor is 8 g / h, the treatment temperature is 25 ° C, decolorization Time is 3h.

[0054] (3) Post-processing procedure: Decolorizing the removal of the fabric, washed 3 times in water at a water temperature of 50 ° C, dried.

[0055] The color polyester fabric changes after treatment after the method is shown, and the same test method in Example 1 is used to test the K / S value of the polyester fabric before and after the decolor, which is calculated, and the example...

Example Embodiment

[0056] Example 3:

[0057] Decolorization: Use C.I. Disperse red 167 with o.W.f of 2% dyed polyester knitted polyester knitted.

[0058] The non-colored polyester fabric is decolorized by the following method:

[0059] (1) Rolling Process: Place the dyed polyester fabric in 2 g / L dimethyl sulfoxide and hypochlorite mixed solution, so that the liquid is 100%, and dimethyl sulfoxide in the mixed solution. The mass ratio of sodium hypochlorite is 1: 1.

[0060] (2) Decolorization Process: Place a weapon-liquid fabric in the reactor, ozone is input by one end, the exhaust gas is output from one end, the ozone pass rate in the reactor is 8 g / h, the treatment temperature is 25 ° C, decolorization Time is 3h.

[0061] (3) Post-processing procedure: Decolorizing the removal of the fabric, washed 3 times in water at a water temperature of 50 ° C, dried.

[0062] The color polyester fabric changes after treatment after the method is shown, and the same test method in Example 1 is used t...

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Abstract

The invention discloses a method for recycling colored polyester fabric, belongs to the technical field of resource utilization of waste fabric, and mainly aims at recycling and color repairing of the colored polyester fabric. According to the method, ozone with strong oxidizing property is combined with dimethyl sulfoxide or a sodium hypochlorite solution to decolorize the colored polyester fabric, so that chromophoric groups of dye on the fabric are destroyed, and thus the purpose of decolorization is achieved; The method has remarkable decolorizing effect on the colored polyester, can achieve a decolorizing rate of 90% or above, the strength damage of a decolorizing process to the polyester fabric is small, and reutilization of the decolorized fabric is facilitated. The method involves fewer chemical reagents and less energy consumption and has less environmental pollution, so that the method meets the requirement of environmental protection.

Description

technical field [0001] The invention relates to a method for recycling colored polyester fabrics, and belongs to the technical field of resource utilization of waste fabrics. Background technique [0002] With the advancement of science and technology and the improvement of consumption levels, the service life of clothing textiles is getting shorter and shorter, and industrial textiles are gradually increasing. According to statistics, my country's total textile fiber processing in 2016 was about 53.8 million tons, of which polyester output was as high as 28.4 million tons, and the amount of waste textiles recycled in that year was about 2.7 million tons. It is estimated that more than 26 million tons of waste clothes are discarded directly in my country every year. In contrast, the recycling rate of waste textiles is extremely low. Polyester (polyethylene terephthalate, PET) is a hydrophobic fiber with extremely low swelling in water and tightly arranged molecular chains. ...

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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IPC IPC(8): D06L4/50D06L4/23D06L4/00D06L4/70
CPCD06L4/50D06L4/23D06L4/70D06L4/00Y02W30/62
Inventor 范雪荣任腊梅娄江飞高卫东袁久刚徐进
Owner JIANGNAN UNIV
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