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Flexible preparation process of recycled polyester materials

A preparation process and recycled polyester technology, applied in the preparation of hydroxyl compounds, carboxylic acid esters/lactones, organic compounds, etc., can solve the problem of waste polyester recycling rate, technical level and product grade gap, recycled fiber Quality needs to be improved urgently to achieve the effects of high energy utilization efficiency, increased dyeing rate, and shortened reaction time

Active Publication Date: 2019-01-01
安徽融泰再生资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with foreign developed countries and regions, my country has not yet formed a scale in terms of waste textiles, especially polyester products. There is still a considerable gap in the recycling rate, technical level and product grade of waste polyester, and the quality of recycled fibers needs to be improved urgently.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A flexible preparation process for recycled polyester materials, comprising the following process steps:

[0031] (1) Dispose of the buttons, zippers, etc. on the recycled waste polyester fiber products, and remove the impurities visible to the naked eye to facilitate the needs of subsequent processing, and then store them in a constant temperature and humidity environment for storage. 4 hours or more is better, the temperature is 15-20°C, and the humidity is 75-85%. The fiber products stored under these conditions are easy to detect the subsequent composition and content;

[0032] (2) Use an intelligent color component sorting system to separate the waste polyester fiber products in step (1), and sort the same color or those with a color similarity of more than 80% into one category; and the same color Sorting the waste and old polyester fiber products in the waste polyester fiber products, and keeping the waste and old polyester fiber products with a PTE content of 30...

Embodiment 2

[0038] A flexible preparation process for recycled polyester materials, comprising the following process steps:

[0039] (1) Dispose of the buttons, zippers, etc. on the recycled waste polyester fiber products, and remove the impurities visible to the naked eye to facilitate the needs of subsequent processing, and then send them to a constant temperature and humidity environment for storage. 4 hours or more is better, the temperature is 15-20°C, and the humidity is 75-85%. The fiber products stored under these conditions are easy to detect the subsequent composition and content;

[0040](2) Use an intelligent color component sorting system to separate the waste polyester fiber products in step (1), and sort the same color or those with a color similarity of more than 80% into one category; and the same color Sorting the waste and old polyester fiber products in the waste polyester fiber products, and keeping the waste and old polyester fiber products with a PTE content of 30-6...

Embodiment 3

[0053] A flexible preparation process for recycled polyester materials, comprising the following process steps:

[0054] (1) Dispose of the buttons, zippers, etc. on the recycled waste polyester fiber products, and remove the impurities visible to the naked eye to facilitate the needs of subsequent processing, and then store them in a constant temperature and humidity environment for storage. 4 hours or more is better, the temperature is 15-20°C, and the humidity is 75-85%. The fiber products stored under these conditions are easy to detect the subsequent composition and content;

[0055] (2) Use an intelligent color component sorting system to separate the waste polyester fiber products in step (1), and sort the same color or those with a color similarity of more than 80% into one category; and the same color Sorting the waste and old polyester fiber products in the waste polyester fiber products, and keeping the waste and old polyester fiber products with a PTE content of 30...

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PUM

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Abstract

Disclosed is a flexible preparation process of a regenerated polyester material. The flexible preparation process includes: 1), removing buttons and zippers on waste polyester fiber products, and sending the waste polyester fiber products into a constant-temperature constant-humidity environment for storage; 2), adopting an intelligent color ingredient sorting system to perform color sorting on the waste polyester fiber products, sorting the products in a same color as one group, and retaining the products with PET content of 30-60%; 3), melting the sorted waste polyester fiber products with the PET content of 30-60% to obtain mixed polyester melt, sending the mixed polyester melt into a reaction kettle, adding depolymerization liquid, and adopting microwave radiation for depolymerization to obtain PET melt; 4), sending the PET melt into an extruder for extrusion filtering, filtering and separating impurities like cotton fiber to obtain pure PET melt, and sending the pure PET melt into a polymerization reaction kettle for continuous polymerization for 30-35 min to obtain polymerized PET melt; 5), sending the PET melt into a melt filtering device, and directly spinning the melt after being filtered by the melt filtering device to obtain flexible regenerated fiber.

Description

technical field [0001] The invention relates to the technical field of resource reuse, in particular to a flexible preparation process of recycled polyester materials. Background technique [0002] Nowadays, the proportion of chemical fiber products represented by polyester is increasing in daily life, but with the increasing shortage of natural resources such as oil and the increasing demand, in the next few decades, if there is no new If more oil fields are discovered, the world will face a crisis of depletion of oil resources. Therefore, people began to turn their attention to the production of recycled polyester fibers, that is, to obtain new recycled products through reprocessing of virgin polyester products, which can effectively use resources and protect the environment and reduce pollution. With the development of the recycled polyester industry, recycled polyester fiber and textile clothing produced from waste polyester bottles and waste textiles have gradually bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01F1/04D01F1/06C08G63/183C08G63/78C07C51/09C07C63/26C07C29/09C07C31/20
CPCC07C29/095C07C51/09C08G63/183C08G63/78D01F1/04D01F1/06D01F1/10D01F6/92C07C63/26C07C31/202
Inventor 施文东
Owner 安徽融泰再生资源有限公司
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