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Recycling method of meta-position aramid fiber waste and recycled material

A technology of aramid fiber and recycling method, which is applied in the field of polymer chemistry, can solve the problems of waste and pollution of meta-aramid fiber, and achieve the effects of being convenient for manual operation, solving environmental pollution, and having good solubility

Active Publication Date: 2021-12-17
ZHUZHOU TIMES FIBER PIONEER MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a method for recycling meta-aramid fiber waste and reclaimed materials to solve the problems caused by debugging waste, corner waste and meta-aramid fiber that have expired in the production process of meta-aramid fiber. Waste and environmental pollution problems, realize resource reuse, reduce production costs

Method used

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  • Recycling method of meta-position aramid fiber waste and recycled material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Place the 6mm meta-aramid chopped fiber waste in a vacuum oven at 80°C for 1.5h, after cooling, accurately weigh 17.0g chopped fiber and add it to 100ml DMPU, soak at room temperature for 2h, add 1.0g to the slurry Lithium chloride, the slurry was poured into a 250ml single-necked flask, and stirred at 90° C. with a mechanical seal for 1 hour to obtain a colorless and transparent aramid resin solution.

Embodiment 2

[0032] Place meta-aramid fibrous waste in a vacuum oven at 90°C for 2 hours, and after cooling, process it with a crusher to make it smaller than 1cm 2 Then accurately weigh 10.0g of the broken precipitated fiber waste and add it to 100ml DMPU, soak at room temperature for 1h, add 1.5g of magnesium chloride to the slurry, pour the slurry into a 250ml single-necked flask, and place at 85°C Stir with a mechanical seal for 1.5 hours to obtain a colorless and transparent aramid resin solution.

Embodiment 3

[0034] Place the meta-aramid filament waste in a vacuum drying oven at 80°C for 1 hour, and after cooling, process it into 6mm chopped fibers by a fiber cutter, then accurately weigh 12.0g of chopped fibers and add them to 100ml DMPU, soak at room temperature for 1.5 h, add 1.0 g of lithium chloride to the slurry, pour the slurry into a 250 ml one-necked flask, and stir for 1.5 h with a mechanical seal at 80° C. to obtain a colorless and transparent aramid resin solution.

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Abstract

The invention provides a recycling method of meta-position aramid fiber waste and a recycled material, and belongs to the technical field of high polymer chemistry. The recycling method comprises the following steps: (1) drying meta-position aramid fiber waste, and cutting or crushing the meta-position aramid fiber waste to prepare chopped fibers or precipitation fragments; (2) soaking the chopped fibers or the precipitation fragments in the step (1) with an organic solvent under normal pressure to obtain slurry; and (3) mixing the slurry with a cosolvent, and carrying out a stirring reaction under a closed condition to obtain a colorless and transparent meta-position aramid resin solution. According to the recycling method, adopted equipment is simple, the technological process is simple, the treatment cost is low, and industrial feasibility is achieved; solvent consumption is relatively low, and low toxicity and environmental protection are realized; and a high-temperature aerobic environment is avoided in the technological process, the apparent color of the prepared meta-position aramid resin solution does not turn yellow obviously, the performance of subsequent products is not affected, the meta-position aramid resin solution can be directly used for spinning or preparation of fibrid, the problem of environmental pollution caused by meta-position aramid fibers is solved, and the input-output rate of the meta-position aramid resin is increased.

Description

technical field [0001] The invention relates to the technical field of polymer chemistry, in particular to a method for recycling meta-aramid fiber waste and recycled materials. Background technique [0002] Meta-aramid paper has excellent mechanical properties, chemical resistance, high temperature resistance and electrical insulation properties, and is widely used in key fields such as rail transit, aerospace and new energy. my country's research on meta-aramid materials started relatively late, but in recent years, with the rapid development of high-speed trains, subway light rail and power grid transformation, the domestic demand for meta-aramid paper is increasing, and with the development of meta-aramid Paper raw materials began to be gradually localized. While the scale and output of domestic meta-aramid fiber production lines continue to expand, the waste and pollution problems caused by meta-aramid fiber waste have begun to emerge. At present, the recycling of meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F13/04
CPCD01F13/04Y02P70/62Y02W30/62
Inventor 丁娉宋欢黎勇杨清杨军李正胜唐莹刘兴隆田宗芳鲍时宽
Owner ZHUZHOU TIMES FIBER PIONEER MATERIAL TECH CO LTD
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