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Dope-dyed polyacrylonitrile fiber and preparation method thereof

A technique for coloring polyacrylonitrile fiber and stock solution, which is applied in wet spinning, adding pigments and organic dyes to the spinning solution, which can solve the problems of low solvency, complicated solvent recovery process and high production cost, and achieve excellent durability Effects of climate resistance, excellent sun resistance, and good mechanical properties

Inactive Publication Date: 2016-10-05
JILIN ACRYLIC FIBERS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the color difference of the fiber after dyeing is still uncontrollable, and the color fastness of the fiber is low, grade 3-5, and it is easy to fade after repeated washing and short-term outdoor use
[0006] (4) Dose coloring NaSCN wet one-step spinning acrylic fiber process method, using sodium thiocyanate NaSCN as solvent, acrylonitrile AN as the first monomer, methyl acrylate MA and methyl methacrylate MMA as the second and third One-step spinning process of monomer polymerization, the spinning process has a long route, large floor area, difficult solvent recovery, relatively high energy consumption, and high production cost; the quality of the dope dyed fiber produced by this process is unstable, and the color difference in batch production Big
The disadvantages of NaSCN wet spinning are: the solvent recovery process is complicated, the equipment used for recovery has a large investment; bring some difficulties

Method used

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  • Dope-dyed polyacrylonitrile fiber and preparation method thereof
  • Dope-dyed polyacrylonitrile fiber and preparation method thereof
  • Dope-dyed polyacrylonitrile fiber and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A preparation method for dope dyed polyacrylonitrile fibers, comprising the following steps:

[0042] 1. Mix acrylonitrile and vinyl acetate as the first and second monomers in a certain proportion, and obtain polymer powder by aqueous suspension polymerization technology; mix 93wt% acrylonitrile and 7wt% vinyl acetate, and then add Distilled water, so that the total concentration of the two monomers is 15wt%, at 55 ° C, the pH is 3 to carry out the aqueous phase suspension polymerization reaction continuously; the polymer after the reaction is terminated by the chelation reaction, and the unreacted monomer is removed by a stripper body, and then wash and filter with water to remove salt and moisture, and then dry the powdery polymer obtained after granulation.

[0043] 2. Prepare step 1. Mix and dissolve the prepared polymer powder with dimethylacetamide solvent, heat up, homogenize and mix, cool down, and filter to obtain spinning stock solution; polymer powder and di...

Embodiment 2

[0051] A preparation method for dope dyed polyacrylonitrile fibers, comprising the following steps:

[0052] 1. Mix acrylonitrile and vinyl acetate as the first and second monomers in a certain proportion, and obtain polymer powder by aqueous phase suspension polymerization technology; mix 94.25wt% acrylonitrile and 5.75wt% vinyl acetate, Then distilled water was added to make the total concentration of the two monomers to be 25 wt%, and the aqueous phase suspension polymerization reaction was carried out continuously at 60° C. and pH 3.5. After the reaction, the polymer is terminated by chelation reaction, the unreacted monomer is removed by a stripper, and then the salt and water are removed by washing and filtering, and the powdery polymer is obtained by drying after granulation.

[0053] 2. Prepare step 1. Mix and dissolve the prepared polymer powder with dimethylacetamide solvent, heat up, homogenize and mix, cool down, and filter to obtain spinning stock solution; polyme...

Embodiment 3

[0062] A preparation method for dope dyed polyacrylonitrile fibers, comprising the following steps:

[0063] 1. Mix acrylonitrile and vinyl acetate as the first and second monomers in a certain proportion, and obtain polymer powder by aqueous suspension polymerization technology; mix 90.1wt% acrylonitrile and 9.9wt% vinyl acetate, Then a solvent was added to make the total concentration of the two monomers be 15 wt%, and the suspension polymerization reaction in aqueous phase was continuously carried out at 60° C. and pH 3.5. After the reaction, the polymer is terminated by chelation reaction, the unreacted monomer is removed by a stripper, and then the salt and water are removed by washing and filtering, and the powdery polymer is obtained by drying after granulation.

[0064] 2. Prepare step 1. Mix and dissolve the prepared polymer powder with dimethylacetamide solvent, heat up, homogenize and mix, cool down, and filter to obtain spinning stock solution; polymer powder and d...

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Abstract

The invention relates to a dope-dyed polyacrylonitrile fiber and a preparation method thereof, belonging to the field of polyacrylonitrile. The preparation method comprises the following concrete steps: mixing acrylonitrile, vinyl acetate, first monomer and second monomer according to a certain proportion and preparing polymer powder by using water-phase suspension polymerization technology; subjecting the prepared polymer powder and a dimethyl acetamide solvent to mixing and dissolving and successively carrying out heating, homogenization and mixing, cooling and filtering so as to prepare a spinning stock solution; and subjecting pigment, polyacrylonitrile and dimethyl acetamide to mixing and grinding so as to obtain a coloring agent solution, carrying out grinding, injecting the coloring agent solution into the spinning stock solution in a pre-spinning injection manner in virtue of an injection system and carrying out DMAC wet spinning. The fiber prepared in the invention has a brilliant color, superior mechanical properties and excellent weatherability and solarization resistance. A fabric prepared by using the method is extensively applied to a variety of interior decorations, outdoor places with severe climatic environment conditions and special places with strict requirements.

Description

technical field [0001] The invention relates to the field of polyacrylonitrile, in particular to a dope-colored polyacrylonitrile fiber and a preparation method thereof. Background technique [0002] Most of the dyed fiber products have the problems of large color difference, low color fastness to weather resistance, easy fading and poor durability in the process of production and use. The main reason is that most of the fibers themselves and the characteristics of the dyeing process seriously affect the appearance and quality of the fabric and limit the application. With the improvement of the national economy and people's living standards and quality, the market has put forward higher requirements for the color fastness and durability of dyed fibers and their products. At present, the downstream market requires durability, non-fading and weather resistance. Almost all polyacrylonitrile fibers with high color fastness are imported, which is seriously restricted by others. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/04D01D5/06C08F220/44C08F218/08C09B67/20
Inventor 高岩刘建军孙小君王万春杜万洪李洪晨杨永生施二铁金鹏韩嵩柳长青马雪松刘旭光王立
Owner JILIN ACRYLIC FIBERS CO LTD