Method for preparing self-adhesive antibacterial sheath-core fiber by regenerating waste polyester

A skin-core fiber and self-adhesive technology, which is applied in fiber treatment, fiber chemical characteristics, melt spinning, etc., can solve the problem of single performance of recycled polyester, achieve good compatibility, improve reuse value, and keep green The effect of environmental characteristics

Pending Publication Date: 2021-05-07
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of single performance of regenerated polyester, the present invention utilizes chemical catalytic alcoholysis method for efficient depolymerization, then refines and purifies the product, and repolymerizes to prepare high-quality regenerated polyester, and adds modifiers and antibacterial agents to realize waste polymerization High-value and functionalized recycling of esters

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing self-adhesive antibacterial sheath-core fibers from waste polyester regeneration of the present embodiment comprises the following steps:

[0028] 1. Preparation of regenerated polyester with low melting point antibacterial cortex

[0029] (1) Using waste polyester (polyester pulp) as raw material, put it and ethylene glycol into the depolymerization reactor at a mass ratio of 1:2, and add the total amount of waste polyester and ethylene glycol at 160°C The zinc acetate catalyst with a mass of 0.1% is depolymerized for 1 hour to prepare a refined depolymerized product containing ethylene terephthalate; the prepared depolymerized product is filtered and rectified to obtain a high-purity depolymerized liquid.

[0030] (2) add to the depolymerization liquid of high purity again and account for the isophthalic acid of refining depolymerization liquid mass percentage 0.1% as modifier, account for the nano silver of refining depolymerization liquid mass...

Embodiment 2

[0039] A method for preparing self-adhesive antibacterial sheath-core fibers from waste polyester regeneration of the present embodiment comprises the following steps:

[0040] 1. Preparation of regenerated polyester with low melting point antibacterial cortex

[0041] (1) Using waste polyester (polyester bottle flakes) as raw material, put the waste polyester raw material and ethylene glycol into the depolymerization reactor at a mass ratio of 1:3, add waste polyester and ethylene glycol at 180°C The manganese acetate catalyst of 1% of the total mass of diol is depolymerized for 3 hours to prepare a refined depolymerized product containing ethylene terephthalate; the prepared depolymerized product is filtered and rectified to obtain a high-purity depolymerized product. poly liquid.

[0042] (2) add again to high-purity depolymerization liquid and account for the isophthalic acid of refining depolymerization liquid mass percent 0.5% as modifying agent, account for the nano-si...

Embodiment 3

[0051] A method for preparing self-adhesive antibacterial sheath-core fibers from waste polyester regeneration of the present embodiment comprises the following steps:

[0052] 1. Preparation of regenerated polyester with low melting point antibacterial cortex

[0053] (1) Using waste polyester (polyester fiber and polyester waste silk) as raw material, put the waste polyester raw material and ethylene glycol into the depolymerization reactor at a mass ratio of 1:3, and add the waste polyester at 200°C The lead acetate catalyst of polyester and ethylene glycol gross mass 5% carries out the depolymerization reaction of 5 hours, prepares the refining depolymerization product containing ethylene terephthalate; The depolymerization product of preparation obtains high pure depolymerization solution.

[0054] (2) add to the depolymerization liquid of high purity again and account for the isophthalic acid of refining depolymerization liquid mass percentage 1% as modifier, account fo...

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Abstract

The invention discloses a method for preparing a self-adhesive antibacterial skin-core fiber by regenerating waste polyester. The method is characterized in that antibacterial low-melting-point regenerated polyester is used as a skin layer, regenerated polyester is used as a core layer, and a coaxial self-adhesive antibacterial skin-core structure composite fiber is prepared through melt composite spinning. On one hand, prepared fibers completely adopts the recycled polyester as a raw material, the green and environment-friendly characteristics of the recycled polyester are well maintained, the current white pollution problem of the waste polyester is effectively relieved, meanwhile, energy conservation and emission reduction are achieved, petroleum consumption is reduced, and extremely high environment-friendly benefits are achieved; and on the other hand, nano-silver or cuprous oxide is used as an antibacterial agent to endow the regenerated polyester with a broad-spectrum antibacterial effect, so that the self-adhesion performance and high-value applicability of the regenerated polyester are remarkably improved, the reutilization value of the waste polyester is favorably improved, the regenerated polyester industry is promoted to develop towards high-end application, and then industry development and industry transformation and upgrading are promoted.

Description

technical field [0001] The invention relates to the field of chemical fiber materials, in particular to a method for preparing self-adhesive antibacterial sheath-core fibers by recycling waste polyester. Background technique [0002] The recycling methods of waste polyester mainly include physical regeneration method and chemical regeneration method. The physical recycling method generally refers to the production of recycled products through physical processes such as crushing, opening, spinning, and heat treatment of waste textiles under the condition that the chemical structure of waste polyester products remains unchanged. The physical regeneration method has high requirements for raw material selection, downgrade regeneration, and the mechanical properties of recycled polyester are low, and formaldehyde is easy to be generated during the recycling process. [0003] The chemical regeneration method is to separate and crush waste polyester materials, depolymerize them un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10D01D5/08D01D5/34C08G63/183C08G63/181C08G63/78
CPCD01F8/14D01F1/103D01D5/08D01D5/34C08G63/183C08G63/181C08G63/78
Inventor 张须臻施强王秀华黄飞桥周锦南婧文
Owner ZHEJIANG SCI-TECH UNIV
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