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Polyester fiber or polyester fabric waste recycling method

A technology of polyester fabric and polyester fiber, which is applied in the field of recycling and reuse after dissolving or alcoholysis of ethylene terephthalate, can solve the problems of waste of energy and cost, complicated operation, large labor cost, etc., and save labor force. , the effect of saving space

Active Publication Date: 2012-07-25
CHINA TEXTILE ACAD JIANGNAN BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN200910196653.0 is mainly aimed at the recycling of low-viscosity polyester fiber or polyester fabric waste; CN201010190044.7 needs to manually remove the non-polyester part of the discarded polyester clothing of the same color, and then crush it for processing, resulting in a large amount of labor costs; and CN97181632. 8 The main purpose is to recover terephthalic acid and ethylene glycol. If this is used for polymerization and spinning, the operation is too cumbersome and a lot of energy and cost are wasted

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 fiber or polyester fabric waste recycling method

Examples

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Effect test

Embodiment 1

[0022] Put polyester fibers with an intrinsic viscosity of 0.35, polyester fabrics and their blended fabric wastes directly into the reaction kettle without sorting, add a mixed solvent of phenol-tetrachloroethane, and dissolve them at about 80°C. After the dissolution is completed, Carry out centrifugation and filtration, distill the obtained solution, recover phenol and tetrachloroethane, and carry out liquid-phase viscosity-increasing polymerization and spinning on the remaining liquid, so as to realize the reuse of polyester fiber, polyester fabric and its blended fabric waste .

Embodiment 2

[0024] Put the polyester fiber, polyester fabric and its blended fabric waste with an intrinsic viscosity of 0.62 directly into the reaction kettle without sorting, add o-chlorophenol, and dissolve at 50°C. After the dissolution is complete, after the dissolution is completed, Carry out centrifugation and filtration, distill the obtained solution, recover o-chlorophenol, and carry out liquid-phase viscosity-increasing polymerization and spinning on the remaining liquid, so as to realize the reuse of polyester fiber, polyester fabric and its blended fabric waste.

Embodiment 3

[0026] Put polyester fibers with an intrinsic viscosity of 0.45, polyester fabrics and their blended fabric wastes directly into the reactor without sorting, add nitrobenzene, and dissolve them at 25°C. After the dissolution is completed, centrifuge and filter them. The obtained solution is distilled, nitrobenzene is recovered, and the remaining liquid is subjected to liquid-phase viscosity-increasing polymerization and spinning by other techniques, so as to realize the reuse of polyester fiber, polyester fabric and its blended fabric waste.

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Abstract

The invention discloses a polyester fiber or polyester fabric waste recycling method, belonging to the technical field of polyester recycling. The method comprises the following steps: placing polyester fiber wastes, polyester fabric wastes, polyester blended fiber wastes and polyester blended fabric wastes thereof in a reaction kettle, adding solvent and catalyst, dissolving or alcoholizing ethylene terephthalate at 25 DEG C-200 DEG C; filtering the obtained solution, discharging the filtered solution in a distillation kettle; and distilling the solution to recycle organic solvent. Compared with the existing recycling methods of polyester fiber wastes, polyester fabric wastes, polyester blended fiber wastes and polyester blended fabric wastes, the method disclosed by the invention can be used to treat pure polyester fiber and polyester fabric and can also be directly used to treat polyester blended fiber and polyester blended fabric; the method has no requirement on the viscosities of polyester fiber wastes, polyester fabric wastes, polyester blended fiber wastes and polyester blended fabric wastes, thus manual sorting is not required for the clothes prepared from the materials; and the method can not cause serious pollution to the environment and can meet the requirements of energy saving and emission reduction.

Description

Technical field: [0001] The invention relates to the recycling and reuse of polyester fiber, polyester fabric and its blended fabric waste in the textile field, in particular to a method for dissolving or dissolving ethylene terephthalate in polyester fiber, polyester fabric and its blended fabric waste by using an organic solvent Recycling method after alcoholysis. Background technique: [0002] Polyester is the largest and most widely used synthetic fiber variety in the world. In recent years, with the sustained and rapid growth of the domestic economy and the continuous improvement of domestic residents' consumption capacity, the demand for polyester staple fiber has continued to increase, and it is widely used in clothing and bedding. , all kinds of decorative fabrics, special fabrics for national defense and other textiles and other industrial fiber products. However, due to the high tensile strength and good elasticity of polyester, as well as wear resistance, heat re...

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 Patents(China)
IPC IPC(8): C08J11/08C08J11/10C08J11/24C08L67/00
CPCY02W30/62
Inventor 李庆峰杜芳张学斌
Owner CHINA TEXTILE ACAD JIANGNAN BRANCH
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