Method for producing recycled polyester by replacing waste cloth or bubble materials with friction materials

A technology of recycled polyester and its production method, which is applied in the field of textile production, can solve the problems of poor quality of recycled polyester, many defects on the fiber surface, uneven thickness, etc., and achieve the effect of ensuring quality, meeting environmental protection requirements, and eliminating hidden dangers of personal safety

Inactive Publication Date: 2018-02-16
浙江佳人新材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with virgin polyester, the quality of recycled polyester is poor. Taking recycled chemical fiber as an example, the hand feel of the same denier is not as good as that of the original polyester, and the fiber surface has many defects, uneven thickness, and physical indicators such as strength are slightly inferior.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A production method of recycled polyester using friction material instead of waste cloth or foam material, the main production process: waste cloth---sorting---coarse crushing---air delivery---fine crushing---friction Material production---air delivery---friction material dicing---air delivery---screw conveying---bagging.

[0026] A kind of production method of the regenerated polyester that adopts friction material to replace waste cloth or bubble material, its specific steps are:

[0027] (1) The waste cloth is pretreated, mainly to separate metal impurities, etc.; from the purchase of waste cloth to the production of friction materials, there are foreign matter inspections to ensure the quality of friction materials and avoid the mixing of metal impurities. The first step The process uses manual sorting to jump out other impurities such as metal objects. The second line is to arrange magnets on the conveyor belt. When the broken waste cloth is conveyed on the conveyo...

Embodiment 2

[0034] A production method of recycled polyester using friction material instead of waste cloth or foam material, the main production process: waste cloth---sorting---coarse crushing---air delivery---fine crushing---friction Material production---air delivery---friction material dicing---air delivery---screw conveying---bagging.

[0035] A kind of production method of the regenerated polyester that adopts friction material to replace waste cloth or bubble material, its specific steps are:

[0036] (1) The waste cloth is pretreated, mainly to separate metal impurities, etc.; from the purchase of waste cloth to the production of friction materials, there are foreign matter inspections to ensure the quality of friction materials and avoid the mixing of metal impurities. The first step The process uses manual sorting to jump out other impurities such as metal objects. The second line is to arrange magnets on the conveyor belt. When the broken waste cloth is conveyed on the conveyo...

Embodiment 3

[0043] A production method of recycled polyester using friction material instead of waste cloth or foam material, the main production process: waste cloth---sorting---coarse crushing---air delivery---fine crushing---friction Material production---air delivery---friction material dicing---air delivery---screw conveying---bagging.

[0044] A kind of production method of the regenerated polyester that adopts friction material to replace waste cloth or bubble material, its specific steps are:

[0045] (1) The waste cloth is pretreated, mainly to separate metal impurities, etc.; from the purchase of waste cloth to the production of friction materials, there are foreign matter inspections to ensure the quality of friction materials and avoid the mixing of metal impurities. The first step The process uses manual sorting to jump out other impurities such as metal objects. The second line is to arrange magnets on the conveyor belt. When the broken waste cloth is conveyed on the conveyo...

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PUM

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Abstract

The invention relates to a method for producing recycled polyester by replacing waste cloth or bubble materials with friction materials. The method comprises the following steps: (1) pretreating wastecloth; (2) grinding the pretreated waste cloth by a friction material machine so as to obtain a friction material; (3) conveying the friction material into a reactor by a pipeline for carrying out analcoholysis reaction, adding EG, the friction material and a catalyst into an alcoholysis kettle, carrying out an alcoholysis reaction at a temperature of 220-230 DEG C so as to produce BHET (Bs(2-Hydroxyethyl)Terephthalate), doffing and filtering to separate cotton impurities in the BHET liquid, concentrating to separate excessive EG from the BHET liquid, feeding the concentrated BHET liquid into an ester exchange kettle to carry out an ester exchange reaction with methanol, reacting to produce DMT (Dimethyl Terephthalate), performing centrifugal separation and distillation on the DMT liquidso as to obtain a pure DMT liquid serving as a raw material for producing the recycled polyester, carrying out an ester exchange reaction with the EG to produce the BHET, feeding the BHET into a polymerizing pot to carry out a polymerization reaction so as to produce PET (Polyethylene Terephthalate), thereby obtaining the final product. The method disclosed by the invention is simple in process and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of textile production, in particular to a production method of regenerated polyester using friction material instead of waste cloth or foam material. Background technique [0002] With the increase of polyester consumption and the enhancement of people's awareness of environmental protection, the recycling of polyester waste has been paid more and more attention. The use of polyester waste to produce recycled polyester fiber can reduce costs, reduce oil consumption, and improve economic efficiency, which is of great significance to the sustainable development of the chemical fiber industry. At the same time, with the increase in the volume of recycled polyester, the substitution of recycled polyester and virgin polyester has attracted more and more attention from the industry, and the price trends of the two also show a certain positive correlation. Establish an efficient and low-cost raw material recycling...

Claims

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Application Information

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IPC IPC(8): B29B17/00B29B17/02B29B17/04C08J11/24C08G63/183C08G63/85
CPCB29B17/00B29B17/02B29B17/0412B29B2017/0268B29B2017/0496C08G63/183C08G63/85C08J11/24Y02W30/52Y02W30/62
Inventor 楼宝良余新健顾日强符学州茹兴良吴祯山
Owner 浙江佳人新材料有限公司
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