Method for producing fiber grade polyester chip with waste pure polyester garments

A polyester chip and fiber-grade technology, which is applied in the production of fiber-grade polyester chips, can solve the problems of high cost and inability to use recycled raw materials, and achieve the effects of increasing added value, increasing technical content of recycling, and reducing environmental pollution

Inactive Publication Date: 2010-10-13
ZHEJIANG FUYUAN RENEWABLE RESOURCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the shortcomings of existing spinnable filament fiber-grade polyester chip production methods that cannot use recycled raw materials and high cost, the present invention provides a fiber-grade polyester chip production method that uses recycled raw materials and has low cost using waste pure polyester clothing. Method of Ester Slicing

Method used

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Experimental program
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Effect test

Embodiment Construction

[0014] The present invention will be further described below.

[0015] A method utilizing waste pure polyester clothing to produce fiber-grade polyester chips, said method comprising the following steps:

[0016] 1) Remove the buttons from the discarded pure polyester garments of the same color, remove non-polyester fibers, and then use a crusher to break the pure polyester garments into cloth pieces and dry them;

[0017] 2) Continuously feed the dried cloth pieces into the screw melt extruder, the process parameters of the screw melt extruder: screw speed 50-60 rpm, temperature 250°C-270°C, pressure 90Pa-110Pa, After melting and vacuuming, the decrease range of the intrinsic viscosity of the cloth is controlled between 5% and 10%;

[0018] 3) Input the waste pure polyester melt extruded by the screw melt extruder into the reaction kettle, the process parameters of the reaction kettle: temperature 275°C-285°C, pressure 65Pa-75Pa, residence time in the kettle 160 minutes-180 ...

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PUM

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Abstract

The invention relates to a method for producing a fiber grade polyester chip with waste pure polyester garments, which comprises the following steps: 1) removing buttons from waste pure polyester garments with the same color, removing polyester fiber, then utilizing a crusher to break the pure polyester garments into cloth pieces, and drying; 2) feeding the dried cloth pieces into a screw melt extruder continuously, and after vacuum melting, and controlling the drop range of the intrinsic viscosity of the cloth pieces between 5% and 10%; and 3) feeding the waste pure polyester melt extruded by the screw melt extruder into a reaction kettle, carrying out liquid-phase tackifying through ethylene glycol reaction, finely filtering the melt after being tackified, and finally extruding chips. The invention adopts renewable raw materials and is low in cost.

Description

technical field [0001] The invention relates to the field of polymer materials and resource recycling, in particular to a production method of fiber-grade polyester chips. Background technique [0002] China is a big textile country in the world. The annual demand for textile raw materials reaches more than 35 million tons, but the utilization rate of recycled raw materials is only less than three ten thousandths. The service life of clothing is generally 3-5 years. Calculated on the basis of a 60% elimination rate and deducting the export part, the annual amount of waste textiles is nearly 20 million tons, and most of them have not been reused. The main reason is that the recycling technology of waste textiles is still immature. The comprehensive utilization of waste textiles in my country is still in its infancy, and there is basically no large-scale development and utilization. Some small workshops are still using low-level and low-value-added utilization. stage. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01B29C47/92B29C47/36B29C48/395B29C48/04B29C48/69B29C48/92
CPCB29C47/92B29C47/38B29C47/68B29C47/0011B29K2067/00B29C2945/7605B29K2105/26B29C48/04B29C48/395B29C48/69
Inventor 傅金龙应叶华汤跃虎钱培德陈渭雄来小芳杨利永
Owner ZHEJIANG FUYUAN RENEWABLE RESOURCE
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