Process of producing polyacrylic fiber dyeable with both cationic dye and acid dye

A cationic dye, manufacturing method technology, applied in dyeing method, textile and paper making, conjugated synthetic polymer rayon, etc., can solve the problem of low reactivity ratio, increased difficulty in sales management and production management of acrylic fiber, and inability to dye saturation value. To achieve the ideal value and other issues, to achieve the effect of convenient production and management

Active Publication Date: 2007-06-27
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these existing acid dyeable acrylic fibers still have obvious defects, such as the low reactivity ratio in the copolymerization system formed by the third monomer of dyeing modification and acrylonitrile and the second monomer of flexible modification commonly used, As a result, it is easy to cause the dyeing saturation value to fail to reach the ideal value, but after all, the dyeability of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0034] The polyacrylonitrile copolymers A and B are dissolved in the NaSCN aqueous solution with a concentration of 51.3wt% according to the required ratio, and the spinning stock solution with a total solid of the stock solution of 11.8wt% is prepared. The spinning stock solution is filtered by a candle filter with a metering pump and then spun through the spinneret. The draft rate of the nozzle is controlled at -75%, and the filaments are coagulated in a NaSCN aqueous coagulation bath with a temperature of -2.5°C and a concentration of 12wt%. for primary fibers. The primary fiber tow enters the cold drawing machine for pre-drawing, and the drafting ratio is 1.8. Then wash it with water at a temperature of 45-65°C, then enter the preheater and spray it with 85°C hot water to preheat it, and then enter the hot drawing machine to draw the tow at a high power, and the draft ratio is 4.3. Carry out oiling again, the concentration of oil agent is controlled as 3.0wt%. After oili...

Embodiment 4～6

[0038] The polyacrylonitrile copolymers A and B are dissolved in the NaSCN aqueous solution with a concentration of 51.3wt% according to the required ratio, and the spinning stock solution with a total solid of the stock solution of 11.8wt% is prepared. The spinning dope is filtered by a candle filter with a metering pump and then spun through a spinneret. The draft rate of the nozzle is controlled at -76%, and the filaments are coagulated in a NaSCN aqueous coagulation bath with a temperature of -2.4°C and a concentration of 12wt%. for primary fibers. The primary fiber tow enters the cold drawing machine for pre-drawing, and the drafting ratio is 1.9. Then wash with water at a temperature of 45-65°C, then enter the preheating machine and spray with 85°C hot water to preheat, then enter the hot drawing machine, and carry out high-power drafting to the tow, and the drafting ratio is 4.1. Carry out oiling again, the concentration of oil agent is controlled as 2.9wt%. After oil...

Embodiment 7～9

[0042] The polyacrylonitrile copolymers A and B are dissolved in the NaSCN aqueous solution with a concentration of 51.3wt% according to the required ratio, and the spinning dope with the total solid of the dope solution being 12.0wt% is prepared. The spinning stock solution is filtered by a candle filter with a metering pump and then spun through a spinneret. The draft rate of the nozzle is controlled at -75%, and the filaments are coagulated in a NaSCN aqueous coagulation bath with a temperature of -2.4°C and a concentration of 12wt%. for primary fibers. The primary fiber tow enters the cold drawing machine for pre-drawing, and the drafting ratio is 2.0. Then wash it with water at a temperature of 45-65°C, then enter the preheater and spray it with 85°C hot water to preheat it, and then enter the hot drawing machine to draw the tow at a high power, and the draft ratio is 4.3. Carry out oiling again, the concentration of oil agent is controlled as 3.2wt%. After oiling, the ...

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PUM

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Abstract

The process of producing polyacrylic fiber dyeable with both cationic dye and acid dye includes dissolving polyacrylonitrile resin A and polyacrylonitrile resin B in the weight ratio of 1 to (0.6-1.6) in solvent of water solution of NaSCN in the 35- 58 wt% concentration to form raw spinning liquor with total solid content of 8-20 %; spinning the raw spinning liquor through the 8-15 wt% concentration water solution of NaSCN inside the coagulating bath to form nascent fiber; and post-treatment of the nascent fiber to produce polyacrylic fiber product. The third monomer for resin A is sodium methyl acryl sulfonate or 2-acrylamido-2-methyl propyl sulfonic acid and accounts for 0.8-5.0 wt%; and that for resin B is one of N, N-dimethyl amido ethyl methyl acrylate nitrate, N-dimethyl amido ethyl methyl acrylate hydrochloride or N-dimethyl amido ethyl methyl acrylate sulfate and accounts for 3.3-12.5 wt%.

Description

technical field [0001] The invention relates to a method for manufacturing acrylic fibers, in particular to a method for manufacturing acrylic fibers by using NaSCN aqueous solution as a solvent wet spinning process. Background technique [0002] Acrylic fiber has good bulkiness and warmth retention, soft hand feeling, performance similar to wool, and excellent light resistance and radiation resistance. Acrylic fiber has a wide range of applications, and is an ideal textile raw material in the fields of clothing, bedding and soft decoration. The spinning raw material of acrylic fiber is polyacrylonitrile resin, and the dyeing performance of pure polyacrylonitrile resin is very poor. Therefore, in addition to adding the second comonomer to improve flexibility, the third comonomer for dyeing modification must also be added to the resin. body to provide dye-topped dye loci to the polymer molecules. In the prior art, the third monomer of common polyacrylonitrile resin is only ...

Claims

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Application Information

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IPC IPC(8): D01F8/08D01D5/00D06P1/39
Inventor 季春晓黄翔宇章毅
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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