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Preparation method of environment-friendly regenerated polyester staple fibers

A technology of polyester staple fiber and recycled polyester, which is applied in the field of chemical fiber processing, can solve the problems of complex recycling and reuse of polyester textiles, affecting the mechanical properties of polyester fibers, and being difficult to industrialize production, etc. Moldability, antibacterial effect improvement effect

Inactive Publication Date: 2020-12-11
JINJIANG GANGYI FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN110846736A discloses a recycling treatment method for waste polyester fibers, including the following steps: cleaning; alkali treatment; acid treatment; melting; regeneration; property, but the patent uses acid and alkali to treat polyester fiber, which will cause great damage to the fiber and affect the mechanical properties of polyester fiber
However, the process of recycling and reusing polyester textiles in this patent is complicated and difficult for industrial production

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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  • Preparation method of environment-friendly regenerated polyester staple fibers

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing environmentally friendly recycled polyester staple fibers, comprising the following steps:

[0028] Step S10, sorting, pulverizing, removing impurities, cleaning and drying the recycled polyester cloth. The specific process of removing impurities is: putting the recycled polyester cloth after crushing into tetrachloroethane and ethanol in a weight ratio 1. 0:100 mixed in the impurity removal solution, stirred and mixed for 10 minutes, took out the recycled polyester cloth and dried it;

[0029] Step S20, put the recycled polyester fabric into the autoclave, add the treatment liquid and stir evenly, then raise the temperature to 160°C, keep it warm for 4 hours, soak and wash it with acetone, ethanol and deionized for 4 times, and vacuum dry to obtain the pre- Processing polyester cloth recycled materials; the raw materials of the above treatment liquid include: 100 parts of water, 6 parts of iron nitrate, 8.5 parts of oxalic acid; the specific proc...

Embodiment 2

[0034] A method for preparing environmentally friendly recycled polyester staple fibers, comprising the following steps:

[0035] Step S10, sorting, pulverizing, removing impurities, cleaning and drying the recycled polyester cloth. The specific process of removing impurities is: putting the recycled polyester cloth after crushing into tetrachloroethane and ethanol in a weight ratio 0.5:100 mixture in the impurity removal solution, stir and mix for 5 minutes, take out the recycled polyester cloth and dry it;

[0036] Step S20, put the recycled polyester fabric into the autoclave, add the treatment liquid and stir evenly, then raise the temperature to 155°C, keep it warm for 3 hours, soak and wash with acetone, ethanol and deionized three times respectively, and vacuum dry to obtain the pre- Processing polyester cloth recycled materials; the raw materials of the above treatment liquid include: 100 parts of water, 3.5 parts of ferric nitrate, and 5 parts of oxalic acid; the spec...

Embodiment 3

[0041] A method for preparing environmentally friendly recycled polyester staple fibers, comprising the following steps:

[0042] Step S10, sorting, pulverizing, removing impurities, cleaning and drying the recycled polyester cloth. The specific process of removing impurities is: putting the recycled polyester cloth after crushing into tetrachloroethane and ethanol in a weight ratio 1.5:100 mixed in the impurity removal solution, stirred and mixed for 15 minutes, took out the recycled polyester cloth and dried it;

[0043] Step S20, put the recycled polyester fabric into the autoclave, add the treatment liquid and stir evenly, then raise the temperature to 170°C, keep it warm for 5 hours, soak and wash it with acetone, ethanol and deionized for 5 times respectively, and vacuum dry to obtain the pre- Processing polyester cloth recycled materials; the raw materials of the above-mentioned treatment liquid include: 100 parts of water, 8 parts of ferric nitrate, 12 parts of oxalic ...

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Abstract

The invention discloses a preparation method of environment-friendly regenerated polyester staple fibers. The preparation method comprises the following steps that polyester cloth reclaimed materialsare sorted, crushed, purified, cleaned and dried; the polyester fabric reclaimed materials are put into a high-pressure reaction kettle, treatment liquid is added for being uniformly stirred, and heating, cleaning and drying in vacuum are carried out; the polyester fabric reclaimed materials are put into a heating kettle to be heated until the polyester fabric reclaimed materials are completely molten, heat preservation is carried out, an auxiliary agent is added, and heat preservation in vacuum and stirring are carried out; the regenerated polyester with the new polyester fiber are mixed to enter a screw extruder for heating and melting; and a mixed material enters a spinning box, part of solid impurities are filtered and removed, and the environment-friendly regenerated polyester staplefibers are obtained through spinning of a spinneret plate. The physical property of the environment-friendly regenerated polyester staple fibers is basically the same as that of policy polyester staple fibers, the elongation at break is improved to a certain extent compared with that of a normal product, the environment-friendly regenerated polyester staple fibers can be independently spun and blended, the use method is simple and convenient, economic benefits are high, and the environment-friendly regenerated polyester staple fibers are suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of chemical fiber processing, in particular to a method for preparing environmentally friendly recycled polyester staple fibers. Background technique [0002] With the gradual improvement of people's living standards, the frequency of clothes replacement is also getting faster and faster, so more and more waste and old clothes are produced. Due to its excellent performance, polyester fiber has become the most widely used and most consumed fiber variety, and the resulting polyester waste cloth is gradually increasing. If it is not used and discarded casually, it will not only pollute the environment, but also cause a large waste of resources. . Therefore, a reasonable method is needed to recycle the waste polyester cloth. [0003] Chinese patent CN110846736A discloses a recycling treatment method for waste polyester fibers, including the following steps: cleaning; alkali treatment; acid treatment; melting; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10C08J11/06C08L67/02
CPCD01F8/14D01F1/10D01F1/103C08J11/06C08J2367/02Y02W30/62
Inventor 张长春蔡金钟
Owner JINJIANG GANGYI FIBER