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Preparation method of colored special-shaped acrylic fibers by wet spinning

The technology of wet spinning and acrylic fiber is applied in the field of preparation of colored iso-acrylic fiber by wet spinning of sodium thiocyanate aqueous solution, which can solve the problems of easy environmental pollution and high production cost, and achieves the reduction of environmental pollution, low ironing temperature, The effect of high color fastness to washing

Pending Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flat acrylic fiber still needs to go through processes such as dyeing and color extraction in the subsequent application process, which is easy to pollute the environment and has high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of spinning dope:

[0020] Prepare the color paste, the particle size of the pigment particles in the color paste is D 90 =500nm, solid content 21wt%. Add the color paste to the spinning stock solution at 80°C according to the cascade ratio of 2%, and use mechanical shearing to mix. After mixing evenly, the spinning stock solution is used for spinning after defoaming and plate and frame filtration.

[0021] (2) Preparation of colored special-shaped acrylic fibers:

[0022] The uniformly colored colored sodium thiocyanate spinning stock solution is measured by a metering pump and then extruded from a special-shaped spinneret. The length-to-diameter ratio of the spinneret extrusion hole is 12:1. The main spinning parameters are: the temperature of the coagulation bath is 3°C , the coagulation bath concentration is 13%, and the ratio of dope extrusion speed to drawing speed is 1.4. The formed fibers are formed in a secondary coagulation bath, and then c...

Embodiment 2

[0024] (1) Preparation of spinning dope:

[0025] Prepare the color paste, the particle size of the pigment particles in the color paste is D 90 =400nm, solid content 10wt%. Add the color paste to the spinning stock solution at 60°C according to the cascade ratio of 1%, and use mechanical shearing to mix. After mixing evenly, the spinning stock solution is used for spinning after defoaming and plate and frame filtration.

[0026] (2) Preparation of colored special-shaped acrylic fibers:

[0027] The uniformly colored colored sodium thiocyanate spinning stock solution is measured by a metering pump and then extruded from a special-shaped spinneret. The length-to-diameter ratio of the spinneret extrusion hole is 12:1. The main parameters of spinning are: the temperature of the coagulation bath is 2°C , the concentration of coagulation bath is 12.5%, the ratio of dope extrusion speed to drawing speed is 1.35. The formed fibers are formed in a secondary coagulation bath, and t...

Embodiment 3

[0029] (1) Preparation of spinning dope:

[0030] Prepare the color paste, the particle size of the pigment particles in the color paste is D 90 =600nm, solid content 8wt%. Add the color paste to the spinning stock solution at 70°C according to the cascade ratio of 0.5%, and use mechanical shearing to mix. After mixing evenly, the spinning stock solution is used for spinning after defoaming and plate and frame filtration.

[0031] (2) Preparation of colored special-shaped acrylic fibers:

[0032] The colored sodium thiocyanate spinning stock solution with uniform color mixing is measured by a metering pump and then extruded from a special-shaped spinneret. The length-to-diameter ratio of the spinneret extrusion hole is 13:1. The main spinning parameters are: the temperature of the coagulation bath is 3°C , the concentration of the coagulation bath is 13%, and the ratio of the dope extrusion speed to the drawing speed is 1.5. The formed fibers are formed in a secondary coag...

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Abstract

The invention relates to a preparation method of colored special-shaped acrylic fibers by wet spinning. The preparation method comprises the steps of pigment dispersion, color paste homogenization, online blending by online addition before spinning, extrusion by a spinneret, twice coagulation bath for forming, densification, heat setting and the like. The acrylic fibers prepared by the method canbe applied to the field of fur, have a relatively low lustering temperature, do not need a post dyeing process, and are uniform in color and high in color fastness.

Description

technical field [0001] The invention belongs to the field of acrylic fiber preparation, and in particular relates to a preparation method of sodium thiocyanate aqueous solution wet spinning colored special-shaped acrylic fiber with high color fastness. Background technique [0002] The coloring methods of acrylic fibers mainly include three types: dope dyeing, gel dyeing and post-dyeing. Among them, the fiber produced by the dope coloring process has uniform color and high color fastness, which is recognized by the market. In the prior art, there are relevant reports on the dope dyed fiber produced by the wet spinning process of sodium thiocyanate aqueous solution, such as the patent CN1170014C which describes the production method of this process in detail, but what this patent mainly describes is the preparation of colored slurry and the conventional Production of acrylic fibers. Flat acrylic fibers are mainly used in fields such as furs and blankets, and there are many ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/04D01F1/10D01D5/06
CPCD01F6/54D01F1/04D01F1/10D01D5/06
Inventor 杨雪红陈道江黄翔宇路金奎张超峰赵丹贤周小磊周新露邬宜翎
Owner CHINA PETROLEUM & CHEM CORP
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