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Method for producing aramid fiber pulp by aramid fiber waste material

A kind of aramid pulp, aramid fiber technology, applied in plastic recycling, final product manufacturing, textile/flexible product manufacturing and other directions, can solve the problem of low production efficiency, achieve the effect of improving efficiency, reducing process flow and improving production efficiency

Inactive Publication Date: 2008-08-27
上海依极科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shanghai Yiji Technology Co., Ltd. (our company) discloses a manufacturing method of aramid fiber pulp, Chinese Patent Publication No. CN1456719. The aramid fiber leftovers are sorted first, and then cut, knocked, and ground to obtain aramid fiber pulp ; It is a discontinuous manufacturing process that the waste should be sorted and classified first. It adopts single-knife and single-disc equipment, so its production efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Get 10 kilograms of waste aramid filaments, directly put it into a multi-knife mechanical cutter, and chop it so that the average length of the chopped fibers is 3.2 mm;

[0021] (2) Disperse the chopped fibers in water to form a suspension with a concentration of 1.0%;

[0022] (3) The suspension is passed through a multi-knife bilateral beater, and the beating time is 1.5 hours;

[0023] (4) then pass through the double-disc grinder to knock out the broom, wherein the knocking time is 120s to form a stable slurry;

[0024] (5) Put it into a continuous filter for dehydration and dry in a continuous dryer, and then open and pack it to obtain aramid pulp product.

[0025] Performance indicators of aramid pulp products: the specific surface area is 5.8M 2 / g, the average length is 0.98mm, and the logarithmic ratio viscosity is 4.8.

Embodiment 2

[0027] (1) After cleaning the reclaimed aramid gloves, put them directly into a multi-knife mechanical cutting machine and chop them so that the average length of the chopped fibers is 2.5 mm;

[0028] (2) Disperse the chopped fibers in water to form a suspension with a concentration of 3.0%;

[0029] (3) Pass the suspension through a multi-knife bilateral beater, and the beating time is 1.0 hour;

[0030] (4) then through the double-disc grinder, knock out the broom, wherein the knock down time is 80s, forming a stable slurry;

[0031] (5) Put it into a continuous filter for dehydration and dry in a continuous dryer, and then open and pack it to obtain aramid pulp product.

[0032] Performance indicators of aramid pulp products: the specific surface area is 6.0M 2 / g, the average length is 1.1mm, and the logarithmic ratio viscosity is 4.5.

Embodiment 3

[0034] (1) Get 10 kilograms of aramid yarn waste, directly put into the multi-cutter mechanical cutting machine, chop, make the average length of chopped fiber be 2.4mm;

[0035] (2) Disperse the chopped fibers in water to form a suspension with a concentration of 5.0%;

[0036] (3) Pass the suspension through a multi-knife bilateral beater, and the beating time is 2 hours;

[0037] (4) then through the double-disc grinder, knock out and broomify, wherein the knock down time is 150s, forming a stable slurry;

[0038] (5) Finally, put it into a continuous filter for dehydration and dry in a continuous dryer, and then open and pack it to obtain aramid pulp products.

[0039] Performance indicators of aramid pulp products: the specific surface area is 6.2M 2 / g, the average length is 0.95mm, and the logarithmic ratio viscosity is 4.6.

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Abstract

The invention discloses a method for manufacturing aramid pulp by using aramid waste materials, which comprises the following steps: shredding the aramid waste materials by directly arranging the aramid waste materials in a multi-tool mechanical cutter, enabling the average length of the shredded fiber to be 0.1- 5.0mm, dispersing the shredded fiber in water, forming suspending liquid with concentration of 0.1-8.0%, arranging the suspending liquid in a multi-tool bilateral beater, wherein beating time is 0.5-2h, then arranging the beat suspending liquid in a two-plate lapping machine, carrying out the knocking fibrillation, wherein knocking time is 20-300s, forming steady serous fluid, then dehydrating by arranging the serous fluid into a continuous filter and drying by arranging the serous fluid into a continuous drier, then opening, and obtaining the aramid pulp, wherein the aramid waste materials are made of aramid cloth rim leftovers, aramid yarn leftover bits and pieces and aramid filament waste materials, and the aramid waste materials are obtained by recycling used aramid textile such as aramid old gloves and the like. The method of the invention has the advantages of simple process, high manufacturing efficiency and less pollution to environment, simultaneously the method can satisfy the requirements of industrialization.

Description

【Technical field】 [0001] The invention relates to the field of manufacturing aramid fiber and aramid fiber pulp, in particular to a method for producing aramid fiber pulp from aramid fiber waste. 【Background technique】 [0002] Aramid pulp is a kind of aramid commercial product produced by Dupont Company of the United States and Teijin Twaron Company of the Netherlands. It is polycondensed through monomer solution, dry and wet spinning of concentrated sulfuric acid stock solution of polymers, winding and bunching, cutting, and grinding and brooming And obtain the aramid fiber pulp product. At present, the annual output of aramid fiber in the world is about 50,000 tons, while the domestic imported aramid fiber filament reaches 3,000 tons / year. During the use process, a large amount of aramid fiber waste is produced, which has become a valuable resource. [0003] At present, the industrial method of producing aramid pulp, such as the US patent US3767736, needs to undergo mono...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F13/00D01F6/60D01F6/80B29B17/00C08J11/06
CPCY02P70/62Y02W30/62
Inventor 沈德兴王毅周助胜王曙中
Owner 上海依极科技有限公司
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