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Degradable polyester fiber and preparation method thereof

A technology for degrading polyester and fiber, applied in the field of polyester fiber materials, can solve the problems of poor stability of PET materials, complex processing technology, secondary pollution, etc., and achieve the effects of promoting degradation rate, increasing degradation rate, and accelerating aging

Pending Publication Date: 2021-01-05
JIAXING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The chemical recovery process of polyester waste silk is complicated, the separation equipment required for the classification and purification of related substances is high, the investment cost of the process is high, and secondary pollution is prone to occur in the production process, the processing technology is relatively complicated, and the technical level requires High, there are still problems such as slow degradation rate and poor degradation effect; while the physical recycling method of polyester waste silk is one-way recycling, which cannot achieve complete closed utilization, and is also easy to form secondary pollution, and polyester waste silk is easily recycled during the melting process. Due to the decrease of viscosity due to thermal decomposition, the viscosity, molecular weight distribution and chromatin content of PET will all change, resulting in poor stability of PET materials obtained after physical recycling, uneven quality of various batches of supply, and the recycling process is labor-intensive. , high energy consumption, serious environmental pollution, not conducive to centralized management and other issues

Method used

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  • Degradable polyester fiber and preparation method thereof
  • Degradable polyester fiber and preparation method thereof
  • Degradable polyester fiber and preparation method thereof

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preparation example Construction

[0026] figure 1 It is a method flowchart of a preparation method of a degradable polyester fiber shown according to an exemplary embodiment, in figure 1 Among them, the preparation method of the degradable polyester fiber includes:

[0027] Step 100: after the bentonite is micronized, it is sent to a first vacuum drum drying oven at a temperature of 120° C.-150° C. for vacuum drying.

[0028] Step 200: put the nano-scale calcium oxide powder into a calcination box at 200°C for 2-4 hours, then raise the temperature of the calcination box to 500°C to continue calcination of the nano-scale calcium oxide powder for 2-6 hours, and then place the calcination The final nano-scale calcium oxide powder is taken out and cooled, and sent to a second vacuum drum drying oven at a temperature of 120° C.-140° C. for vacuum drying.

[0029] Step 300: Combine PET, vacuum-dried bentonite, vacuum-dried nanoscale calcium oxide powder and 3-glycidyloxyalkyltrialkoxysilane coupling agent accordin...

Embodiment 1

[0043] Step 1: After the bentonite is micronized, it is sent to the first vacuum drum drying oven at a temperature of 130° C. for vacuum drying, and the particle size of the bentonite material after the micronization is 300 nm.

[0044] Step 2: put the nano-scale calcium oxide powder into a calcination box at 200°C for 4 hours, then raise the temperature of the calcination box to 500°C and continue to calcine the nano-scale calcium oxide powder for 4 hours, and then place the calcined The nanoscale calcium oxide powder is taken out and cooled, and then sent to a second vacuum drum drying oven at a temperature of 120° C. for vacuum drying. The particle size of the nanoscale calcium oxide powder material is 60 nm.

[0045] Step 3: The PET, the vacuum-dried bentonite, the vacuum-dried nano-scale calcium oxide powder and the 3-glycidyloxyalkyltrialkoxysilane coupling agent according to the ratio of 95:3:1:1 After mixing the weight ratio, it is sent into the twin-screw extruder to ...

Embodiment 2

[0053] Step 1: After the bentonite is micronized, it is sent to the first vacuum drum drying oven at a temperature of 150° C. for vacuum drying, and the particle size of the bentonite material after the micronization is 200 nm.

[0054] Step 2: Put the nano-scale calcium oxide powder into a calcination box at 200°C for 3 hours, then raise the temperature of the calcination box to 500°C to continue calcining the nano-scale calcium oxide powder for 5 hours, and then place the calcined The nanoscale calcium oxide powder is taken out and cooled, and then sent to a second vacuum drum drying oven at a temperature of 130° C. for vacuum drying. The particle size of the nanoscale calcium oxide powder material is 50 nm.

[0055] Step 3: the PET, the vacuum-dried bentonite, the vacuum-dried nano-scale calcium oxide powder and the 3-glycidyloxyalkyltrialkoxysilane coupling agent according to the ratio of 94:4:1:1 After mixing the weight ratio, it is sent into the twin-screw extruder to pr...

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Abstract

The invention discloses a degradable polyester fiber and a preparation method thereof, and relates to the technical field of polyester fiber materials. According to the degradable polyester fiber andthe preparation method thereof provided by the invention, bentonite and nanoscale calcium oxide powder are added into a PET material for melt spinning to prepare the degradable polyester fiber, afterthe degradable polyester fiber meets water in a humid environment, the bentonite uniformly distributed in the fiber material absorbs water to expand, so that cracks are generated on the surface of thefiber to accelerate the aging of the polyester fiber. A small amount of nanoscale calcium oxide powder uniformly distributed in the fiber material slowly reacts with water to generate calcium hydroxide, and the reaction process slowly releases (OH-) for a long time, so that ester bonds in the degradable polyester fiber are in hydrolysis for a long time under an alkaline condition, the degradationrate of the degradable polyester fiber is further promoted, and when the degradable polyester material is applied to fiber material products, especially disposable fiber products, the degradation rate of the polyester fiber can be greatly increased while the fiber performance is not affected.

Description

technical field [0001] The invention relates to the technical field of polyester fiber materials, in particular to a degradable polyester fiber and a preparation method thereof. Background technique [0002] Polyester (PET) is a high-molecular polymer. Polyethylene terephthalate (PET) is produced by polycondensation of terephthalic acid (PTA) and ethylene glycol (EG). particles are finally formed. Fiber-grade polyester chips are used to manufacture polyester staple fibers and polyester filaments, and are raw materials for polyester fiber enterprises to process fibers and related products. The total production of polyester fiber is huge, accounting for about 80% of the entire chemical fiber industry; the production waste in the polyester fiber industry chain is about 3.5 million tons per year, and the amount of waste after consumption is even as high as 23 million tons per year, but its comprehensive recycling rate is low at 5%. With the rapid development of the polyester ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10D01D5/088D01D5/08
CPCD01F6/92D01F1/10D01D5/088D01D5/08
Inventor 韩万里易洪雷颜志勇
Owner JIAXING UNIV
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