Regenerated terylene filament and preparation method thereof

A polyester filament and base material technology, applied in the field of synthetic fibers and its preparation, can solve the problems of no original key technology, no industrial production reports, etc., achieve good mechanical properties and wearing comfort, avoid exhaustion, and improve solution The effect of aggregation rate

Active Publication Date: 2012-06-20
江苏芮邦科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, the scientific research on the preparation of high-quality polyester filament from recycled pol...

Method used

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  • Regenerated terylene filament and preparation method thereof
  • Regenerated terylene filament and preparation method thereof
  • Regenerated terylene filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] in such as figure 1 In the reaction kettle 1 shown, put 10kg of polyester waste silk, 1kg of ethylene glycol, and zinc acetate accounting for 3‰ of polyester waste, and depolymerize at 220°C for 3 hours under a pressure of 1kg. reaction;

[0034] After the reaction is over, lower the temperature of the ethylene glycol depolymerization product to 130-170°C, pass the depolymerization product through a 30-100-mesh filter to remove unreacted waste PET, and then pass the depolymerization product through an activated carbon adsorption column for further adsorption Colored impurities or higher molecular weight polymers, further purify the depolymerization products. Finally, the depolymerization product is pushed into the reactor 2;

[0035] First adjust the temperature of the second reactor to 280° C., and carry out pre-condensation by vacuuming for 30 minutes. When the vacuum degree reaches below 100 Pa, the polycondensation reaction is carried out for 2 hours. After the p...

Embodiment 2

[0037] Drop into the 3rd component BHET of 1kg in the first reactor, and add the same amount of waste silk, ethylene glycol, and catalyzer as in Example 1 to react under the same conditions;

[0038] After the reaction finishes, adopt the same steps as in Example 1 to push the depolymerization product into the second reactor

[0039] First adjust the temperature of the second reactor to 280° C., and carry out pre-condensation by vacuuming for 30 minutes. When the vacuum degree reaches below 100 Pa, the polycondensation reaction is carried out for 3 hours. After the polycondensation reaction, pelletizing, drying, and spinning are carried out to obtain recycled polyester filaments.

Embodiment 3

[0041] in the present invention figure 1 In the reaction kettle 1 shown, put 20kg of polyester waste silk, 40kg of ethylene glycol, and ethylene glycol antimony accounting for 0.1‰ of polyester waste, under a pressure of 4kg, heat preservation at 260°C, and hold pressure for 3 hours. depolymerization reaction;

[0042] Adopt the same step as Example 1 to push the depolymerization product into the second reaction kettle after the reaction finishes;

[0043] Add 6g of ethylene glycol antimony catalyst and 4g of trimethyl phosphate into the second reaction kettle, and adjust the temperature to 280°C, vacuumize for pre-condensation for 1h, and carry out polycondensation reaction when the vacuum reaches below 100Pa , The reaction time is 1.5h. After the polycondensation reaction, pelletizing, drying, and spinning are carried out to obtain recycled polyester filaments.

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PUM

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Abstract

The invention provides regenerated terylene filament, which has higher mechanical properties and is prepared by depolymerizing waste polyester with polyol as a solvent. The PET (Polyethyleneglycol Terephthalate) granules are depolymerized in a homogeneous state by optimizing the solvent, pressure, temperature, time, catalyst and parameter conditions as well as controlling the pressure and temperature, so as to improve the depolymerization reaction rate. A composite catalyst is adopted, thus the ratio of the solvent to waste polyester is strictly controlled, the polyol consumption is reduced, the process economy is improved, the generation of diethylene glycol is reduced, and the quality and spinnability of the regenerated polyester are improved. The depolymerization rate of the polyester and the mechanical properties of the regenerated terylene filament are improved by adding a third component, thus the mechanical properties of the prepared regenerated terylene filament achieve the properties of the conventional terylene filament. The preparation method is simple, economical and environmentally friendly and is suitable for industrial production.

Description

technical field [0001] The invention relates to a synthetic fiber and a preparation method thereof, in particular to a regenerated base polyester filament and a preparation method thereof. Background technique [0002] Existing synthetic polymer compounds are based on petroleum resources, which will be increasingly depleted within decades. Therefore, resource regeneration technology is a necessary means to avoid oil depletion. Polyester plastic products are used in large quantities due to their wide range of uses, so their regeneration is currently the focus of research by scientific researchers. But at present, due to the purity of its renewable resources and the change of its structural properties, it is mainly the development of short fibers, which limits its application. And the amount of polyester recycled each year only accounts for 37% of the production amount. How to increase the recovery of waste polyester is a very urgent problem. [0003] At present, there are...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/183C08G63/78C08J11/24
CPCY02W30/62
Inventor 冯淑芹王建华梅锋徐新荣边树昌郝应超
Owner 江苏芮邦科技有限公司
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