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A kind of high temperature resistant flame retardant polyacrylonitrile fiber and its preparation method

A technology of polyacrylonitrile fiber and high temperature resistance, which is applied in fiber type, fiber treatment, dyeing method, etc. It can solve the problems of washing resistance, poor temperature resistance, too high flame retardant content, and difficult selection of flame retardants, etc. Problems, to achieve the effect of good heat insulation, excellent UV resistance, and simplified manufacturing technology

Active Publication Date: 2018-09-04
JILIN ACRYLIC FIBERS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blending modification is to add an additive flame retardant to the spinning dope. It is required that the content of the flame retardant in the blended flame retardant polyacrylonitrile fiber should not be too high, and the solubility, dispersibility and compatibility with polyacrylonitrile Therefore, it is more difficult to choose a flame retardant, and the flame retardant effect is not as good as that of the copolymerization method, and the washing resistance and temperature resistance are poor. At present, there are few varieties of blended flame retardant acrylic fibers that have been industrialized.
The post-treatment method is to coat the flame retardant finishing agent on the surface of acrylic fiber or fabric, which is a more convenient flame retardant method. The disadvantage is that the flame retardant effect is not long-lasting, and the flame retardant effect will be lost after repeated washing`

Method used

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  • A kind of high temperature resistant flame retardant polyacrylonitrile fiber and its preparation method
  • A kind of high temperature resistant flame retardant polyacrylonitrile fiber and its preparation method
  • A kind of high temperature resistant flame retardant polyacrylonitrile fiber and its preparation method

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Effect test

Embodiment 1

[0043] A kind of high temperature resistant flame retardant polyacrylonitrile fiber, its preparation method is as follows:

[0044] 1. Under the pressure of 0.3Mpa, place the polyacrylonitrile fiber in a hydrazine solution with a concentration of 20wt% for 5 hours at a temperature of 110°C;

[0045] 2. After washing the fiber obtained in step 1, put it into 10wt% sodium hydroxide for treatment for 4 hours at a temperature of 110° C., and then wash it to neutrality;

[0046] 3. Put the washed fibers into an aqueous solution with a concentration of 3wt% calcium ion salt for 1 to 4 hours at a temperature of 120°C, and then wash them with water;

[0047] 4. Put the fiber obtained in step 3 into an oil agent with a concentration of 2% for oiling treatment, the treatment time is 2 hours; finally, dehydrate and dry at a temperature of 90°C. The polyacrylonitrile fiber filament is prepared into a silk cake with a certain quality, height and thickness through the silk cake making equi...

Embodiment 2

[0049] A kind of high temperature resistant flame retardant polyacrylonitrile fiber, its preparation method is as follows:

[0050] 1. Under the pressure of 0.4Mpa, place the polyacrylonitrile fiber in a hydrazine solution with a concentration of 7wt% for 6 hours at a temperature of 120°C;

[0051] 2. After washing the fiber obtained in step 1, put it into a sodium hydroxide solution with a concentration of 5wt% for 1 to 4 hours at a temperature of 120° C., and then wash it until neutral;

[0052] 3. Put the washed fibers into an aqueous solution with a concentration of 5wt% calcium ion salt for 3 hours at a temperature of 80°C, and then wash them with water;

[0053] 4. Put the fiber obtained in step 3 into an oil agent with a concentration of 1% for oiling treatment. The treatment time is 0.5 to 2 hours; finally dehydrate and dry at a temperature of 100°C. The polyacrylonitrile fiber filament is prepared into a silk cake with a certain quality, height and thickness through ...

Embodiment 3

[0055] A kind of high temperature resistant flame retardant polyacrylonitrile fiber, its preparation method is as follows:

[0056] 1. Mix acrylonitrile and vinyl acetate in proportion, and produce polyacrylonitrile fibers through aqueous phase suspension polymerization according to the two-step wet spinning production technology of dimethylacetamide;

[0057] 2. Under the pressure of 0.3Mpa, first place the polyacrylonitrile fibers in a hydrazine solution with a concentration of 15wt% for 1 hour, then dry them at room temperature under ventilated conditions for 2 hours, and then place them in a hydrazine solution with a concentration of 18wt%. Treatment in hydrazine solution for 2 hours; treatment temperature is 110°C;

[0058] 3. After washing the fiber obtained in step 2, put it into a sodium hydroxide solution with a concentration of 8wt% for 4 hours at a temperature of 100° C., and then wash it to neutrality;

[0059] 4. Put the washed fibers into an aqueous solution wit...

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Abstract

The invention relates to a polyacrylonitrile fiber, and concretely relates to a high temperature-resistant flame retardation polyacrylonitrile fiber and a production method thereof. The method concretely comprises the following steps: processing a polyacrylonitrile fiber in a hydrazine solution with the concentration of 7-20wt%, processing the hydrazine processed fiber in an alkaline solution with the concentration of 3-10wt%, washing the alkali processed fiber with water until the fiber is neutral, processing the neutral fiber in an aqueous metal ion salt solution with the concentration of 3-10wt%, oiling the metal salt processed fiber, dehydrating the oiled fiber, and drying the dehydrated fiber to obtain the high temperature-resistant flame retardation polyacrylonitrile fiber. The flame retardation performance LOI of the flame retardation fiber obtained in the invention can reach 40-45, the flame retardation grade is M1, and the amount of smoke generated in the combustion process is very small, the grade of toxic gases is FO, and the smoke amount of the flame retardation fiber in the invention is lower than that of other flame retardation fibers. The flame retardation fiber in the invention has the advantages of high moisture regain rate, high water absorption rate, good dyeability and low shrinkage in boiling water.

Description

technical field [0001] The invention relates to polyacrylonitrile fibers, in particular to a high-temperature-resistant and flame-retardant polyacrylonitrile fiber and a preparation method thereof. Background technique [0002] Acrylic fiber has good warmth retention, unique hand feeling and excellent dyeing performance, and is widely used in daily life and industrial production. However, acrylic fiber is easy to burn, and the oxygen index LOI is only 18-19%, which is the lowest among synthetic fibers. It is a kind of flammable fiber, so the development and research of flame-retardant acrylic fiber is particularly important. Modification, blending modification and post-processing methods. Copolymerization flame retardant modification is produced by copolymerization of acrylonitrile and vinyl chloride or vinylidene chloride, and then a certain amount of SB is added to the spinning stock solution 2 o 3 Powder, as a flame retardant synergist, greatly improves the flame retar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/63D06M11/38D06M11/56D06M11/13D06M11/155D06M11/65D06P3/74D06P3/85D06M101/28
Inventor 王立杜万洪李洪晨孙小君刘建军高岩韩嵩柳长青王海涛马雪松于晓建安继东谢永江王伟
Owner JILIN ACRYLIC FIBERS CO LTD
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