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Normal-temperature chromophilous recycled polyester filament yarn and preparation method thereof

A polyester filament, atmospheric dyeing technology, applied in the manufacture of rayon, single-component polyester rayon, chemical characteristics of fibers, etc. Continuous industrial production and other issues, to achieve the effect of promoting development and utilization, good market prospects, and reducing economic losses

Active Publication Date: 2013-05-29
SUZHOU SHENGHONG FIBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, 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 at present, and it is difficult to prepare high-quality fiber products, resulting in its application being limited.
[0003] In addition, due to the tight molecular structure of polyester, it is difficult to dye polyester. In order to improve the dyeing performance of polyester fibers, physical or chemical modification methods are usually used to change the molecular structure or supramolecular structure of polyester fibers, and to introduce dye molecular acceptors or Increase the space for dye molecules, and prepare a series of cationic and anionic dyeable polyesters, but most polyester fibers still need to be dyed with disperse dyes
However, the high-temperature and high-pressure dyeing method has the disadvantages of high energy consumption, difficulty in continuous industrial production, and difficulty in dyeing in the same bath with fibers such as spandex and wool that are not resistant to high temperatures.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Normal-temperature chromophilous recycled polyester filament yarn and preparation method thereof
  • Normal-temperature chromophilous recycled polyester filament yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] in such as figure 1 Put 10kg of polyester bottle flakes, 3kg of ethylene glycol, and n-butyl peptide acid accounting for 3‰ of polyester waste into the depolymerization kettle 1 shown in the reaction flow chart, and keep warm and pressurized at 250°C under a pressure of 3kg. Carry out depolymerization reaction in 3 hours;

[0042] After the depolymerization is completed, 5% of the depolymerization product is divided into the low-temperature reactor 3, and 5% of nano-MMT and 5% of polyethylene oxide are added to react at 200° C. for 1 hour, and the reaction is completed and passed into the polymerization reactor 2;

[0043] In the polymerization kettle 2, the depolymerization product in the depolymerization kettle 1 was introduced, and at the same time, 1% of adipic acid, 7% of isophthalic acid and 200ppm of stabilizer trimethyl phosphate were added, and 5% of low temperature The product in the reaction kettle 3, raise the temperature to 235°C and vacuumize for pre-cond...

Embodiment 2

[0045] in such as figure 1 Put 10kg of polyester bottle flakes, 5kg of ethylene glycol, and ethylene-based alumina accounting for 5‰ of polyester waste into the depolymerization kettle 1 shown in the reaction flow chart, and keep warm and pressurized at 260°C under a pressure of 2kg. Carry out depolymerization reaction in 2 hours;

[0046] After depolymerization, divide 10% of the depolymerization product into the low-temperature reactor 3 and add 1% nano-MMT to react at 150° C. for 12 hours, and pass it into the polymerization kettle 2 after the reaction is completed;

[0047] The depolymerization product in the depolymerization kettle 1 is passed into the polymerization kettle 2, and 3% of adipic acid, 4% of isophthalic acid and 50 ppm of stabilizer triphenyl phosphite are added simultaneously, and another 20% of For the product in the low-temperature reactor 3, raise the temperature to 260°C and vacuumize for pre-condensation for 30 minutes. When the vacuum degree reaches be...

Embodiment 3

[0049] in such as figure 1 10kg of polyester bottle flakes, 5kg of ethylene glycol, and ethylene glycol antimony accounting for 5‰ of polyester waste are put into the depolymerization kettle 1 as shown in the reaction flow chart. Hours for depolymerization reaction;

[0050] After depolymerization, divide 10% of the depolymerization product into the low-temperature reactor 3 and add 1% nano-MMT to react at 150° C. for 12 hours, and pass it into the polymerization kettle 2 after the reaction is completed;

[0051] The depolymerization product in the depolymerization kettle 1 is passed into the polymerization kettle 2, and 3% of adipic acid, 4% of isophthalic acid and 50 ppm of stabilizer trimethyl phosphate are added at the same time, and 20% of low temperature The product in the reaction kettle 3, raise the temperature to 260°C and vacuumize for pre-condensation, the time is 30min, when the vacuum reaches below 100Pa, raise the temperature to 280°C for polycondensation; Spin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a normal-temperature chromophilous recycled polyester filament yarn and a preparation method thereof. A nano inorganic particle is modified by using a depolymerization product at a lower temperature, and thus the heat stability of an inorganic component is improved, and the porosity of a recycled polyester structure is enlarged; and meanwhile, through adding an additive capable of changing the degree of crystallinity and the crystallization rate of the recycled polyester and reducing the melting point, the structure and the performance of the recycled polyester are changed, and the dyeing property and the mechanical property of fibers are improved, so that the normal-temperature chromophilous recycled polyester filament yarn is prepared. The mechanical strength and the dyeing property of the normal-temperature chromophilous recycled polyester filament yarn are greatly improved in comparison with those of pure Dacron, and thus the creative industrialized production is achieved. The preparation method is simple, economic and environment-friendly, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a synthetic fiber and a preparation method thereof, in particular to a normal-pressure easy-dyeable regenerated polyester filament and a preparation method thereof Background technique [0002] Polyester plastic products are used in large quantities due to their wide range of uses, resulting in the accumulation of a large amount of waste polyester and environmental pollution. And it is based on petroleum resources, and it will also cause the depletion of petroleum resources within a few decades. Therefore, resource regeneration technology is a necessary means to avoid oil depletion and environmental pollution. The "Twelfth Five-Year Plan" Guiding Opinions on Comprehensive Utilization of Resources clearly pointed out that we will strive to increase the recycling rate of major renewable resources to 70% by 2015, and focus on the development of "recycling of waste plastics" and "waste textiles" field, so the regeneration of poly...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183
Inventor 冯淑芹张叶兴梅锋边树昌林镇勇徐广宇田会双
Owner SUZHOU SHENGHONG FIBER CO LTD
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