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Colored regenerated polyester staple fibers and preparation method thereof

A technology of regenerated polyester and staple fiber, applied in the field of colored regenerated polyester staple fiber and its preparation, high-quality colored regenerated polyester staple fiber and its efficient preparation, can solve the problem of high TVOC content and avoid the problem of diethylene glycol Produce, save production cost, improve the effect of depolymerization efficiency

Active Publication Date: 2017-12-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-quality colored regenerated polyester staple fiber and its efficient preparation method, which can effectively improve the color regenerated polyester made from recycled polyester materials while taking into account the production cost and equipment modification cost. The quality of the staple fiber effectively solves the problem of high TVOC content in the colored recycled polyester staple fiber produced by the current improved physical method

Method used

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  • Colored regenerated polyester staple fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A preparation method of colored regenerated polyester fiber, the steps are as follows:

[0061] 1) Add the polyester recycled material with a water content of 50ppm, a catalyst and a polyester oligomer melt with an average degree of polymerization of 2 into a twin-screw extruder for reactive melt blending to obtain a preliminary solution with an average degree of polymerization of 40 Polymelt, where the mass ratio of polyester reclaimed material to polyester oligomer melt is 1:1, and the catalyst is titanium glycol titanium, calculated based on the mass of metal elements in the catalyst relative to the mass of polyester oligomer melt , The catalyst content is 50ppm; the temperature of reactive melt blending is: twin-screw feed section temperature 268℃, twin-screw compression section 288℃, homogenization section temperature 288℃, time is 2min, and the screw is protected by nitrogen;

[0062] 2) The preliminarily depolymerized melt is filtered by the filter I12 with a filter p...

Embodiment 2

[0075] A preparation method of colored regenerated polyester fiber, the steps are as follows:

[0076] 1) Add polyester recycle material with a water content of 90ppm, a catalyst and a polyester oligomer melt with an average degree of polymerization of 1.5 into the twin-screw extruder for reactive melt blending to obtain a preliminary solution with an average degree of polymerization of 20 Polymelt, wherein the mass ratio of polyester recycled material to polyester oligomer melt is 0.1:1, and the catalyst is tetra-n-butyl titanate. The mass of metal elements in the catalyst is relative to that of the polyester oligomer melt. By mass calculation, the content of catalyst is 50ppm; the temperature of reactive melt blending is: twin-screw feed section temperature 260℃, twin-screw compression section 275℃, homogenization section temperature 275℃, time 5min, atmosphere is nitrogen;

[0077] 2) The preliminarily depolymerized melt is filtered by filter I with a filter accuracy of 100μm, t...

Embodiment 3

[0087] A preparation method of colored regenerated polyester fiber, the steps are as follows:

[0088] 1) Add the polyester recycled material with a moisture content of 80ppm, a catalyst and a polyester oligomer melt with an average degree of polymerization of 4 into a twin-screw extruder for reactive melt blending to obtain a preliminary solution with an average degree of polymerization of 30 Polymelt, wherein the mass ratio of polyester recycled material to polyester oligomer melt is 3:1, and the catalyst is tetraisopropyl titanate. The mass of metal elements in the catalyst is relative to that of the polyester oligomer melt. By mass calculation, the content of catalyst is 10ppm; the temperature of reactive melt blending is: twin-screw feed section temperature 275℃, twin-screw compression section 300℃, homogenization section temperature 295℃, time is 1min, atmosphere is nitrogen;

[0089] 2) The preliminarily depolymerized melt is filtered by filter I with a filter accuracy of 50...

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Abstract

The invention relates to colored regenerated polyester staple fibers and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out reactive melting and blending on reclaimed polyester and a polyester oligomer melt to obtain a primary depolymerized melt; then carrying out alcoholysis reaction on the primary depolymerized melt and ethylene glycol to obtain a deep depolymerized melt; then carrying out TVOC (Total Volatile Organic Compound) removal and cracking functional group repairing on the deep depolymerized melt to obtain a low-TVOC-content polyester oligomer melt; then carrying out condensation polymerization on the low-TVOC-content polyester oligomer melt to obtain a low-TVOC-content regenerated polyester melt; finally, controlling color matching of the low-TVOC-content regenerated polyester melt by a computer color matching system to obtain a colored regenerated polyester melt; enabling the colored regenerated polyester melt to enter a melt direct spinning system to prepare the colored regenerated polyester staple fibers. The finally prepared colored regenerated polyester staple fibers provided by the invention have relatively small color aberration; the content of TVOC is 30ppm to 300ppm and the content of nonylphenol and isomers thereof is 80ppm to 200ppm.

Description

Technical field [0001] The invention belongs to the field of regeneration of waste polyester, relates to a colored recycled polyester staple fiber and a preparation method thereof, in particular to a high-quality colored recycled polyester staple fiber with low TVOC using polyester recycled material as a raw material and the same Efficient preparation method. Background technique [0002] Polyethylene Terephthalate (PET, abbreviated as polyester) is a widely used synthetic polymer material. In 2015, the global production of PET exceeded 40 million tons, second only to polyolefin, and is a synthetic fiber. And the leading material used in the food packaging field (accounting for more than 80%). However, as a non-degradable petroleum-based synthetic polymer material, the social reserves of waste polyester products are also very large, especially waste polyester textiles with complex and high content of impurities are growing at a rate of one million tons per year. The recovery ra...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08J11/24C08G63/183C08G63/85C08G63/86C08L67/02
CPCC08G63/183C08G63/85C08G63/863C08G63/866C08J11/24C08J2367/02D01F1/10D01F6/92Y02P20/584Y02W30/62
Inventor 陈烨王朝生王华平王少博吉鹏刘顶
Owner DONGHUA UNIV
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