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Preparation method of flat acrylic fiber

An acrylic fiber and flat technology, which is applied in the field of acrylic fiber preparation, can solve the problems of insufficient application in actual production needs, etc., and achieve the effect of strong rigidity, good spinnability, and soft hand feeling

Inactive Publication Date: 2009-06-03
浙江杭州湾腈纶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical solutions provided in the above-mentioned public documents are not enough to be applied to actual production needs, and some details need further deliberation and experiments by researchers to find the best process conditions to obtain the required flat acrylic fiber

Method used

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  • Preparation method of flat acrylic fiber
  • Preparation method of flat acrylic fiber

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Embodiment

[0027] Embodiment: the preparation method of the flat acrylic fiber in the present embodiment is characterized in that comprising the following steps successively:

[0028] a. Spinning and molding to obtain primary fiber: use polyacrylonitrile dry powder as raw material, and use dimethylacetamide as solvent to prepare a polymer stock solution with a mass percentage concentration of 23-26%. After being heated by a heater, it is sprayed The monofilament is extruded from the special-shaped spinneret holes on the wire board, the heater temperature is controlled at 120-130°C, the glue supply is controlled at 50-60 rpm, the pre-spinning pressure is controlled at 450-700Kpa, and the coagulation bath temperature is 35 ~45°C, the mass percentage concentration of dimethylacetamide in the coagulation bath is 51-54%, and the circulation rate of the coagulation bath is 15000-35000kg / h;

[0029] b. Washing and drawing: the prepared primary fiber is washed and drawn, the temperature of the d...

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Abstract

A preparation method of flat acrylic fiber is characterized by sequentially comprising the following steps: a. spinning forming to prepare as-spun fiber: taking dry polyacrylonitrile powder as a raw material and taking dimethyl acetamide as a solvent to make polymer stock solution with the concentration of 23-26%, heating by a heater followed by extruding monofilament from odd shaped spinneret orifices on a spinneret, and controlling the temperature of the heater at 120-130 DEG C, gelatin supply rate at 50-60r / min, the coagulation bath temperature at 35-45 DEG C, and the concentration of the dimethyl acetamide at 51-54% by weight percentage in the coagulation bath; b. washing and drafting; c. applying oil; d. drying; e. winding; and f. shaping. Compared with the prior art, the preparation method has the advantages that the flat acrylic fiber satisfying the production requirements is prepared by regulating and improving the polymer components, the gelatin supply rate, the temperature of the stock solution, the coagulation bath temperature and the like, and the product has soft hand feeling, high rigidity and good spinnability.

Description

technical field [0001] The invention relates to a method for preparing acrylic fibers, in particular to a method for preparing flat acrylic fibers. Background technique [0002] Acrylic fiber is the trade name of polyacrylonitrile fiber in our country. Acrylic has excellent performance, soft and warm to the touch, and has good elasticity. Light fastness and weather resistance are particularly good. Generally made into short fibers. Available pure or blended with wool. It is used to make textiles, knitwear, blankets, tents, curtains and filter cloths, etc. Because its properties are close to wool, it is called "synthetic wool". Although acrylic fibers are usually called polyacrylonitrile fibers, acrylonitrile (customarily called the first monomer) only accounts for 90% to 94%, the second monomer accounts for 5% to 8%, and the third monomer is 0.3% to 2.0%. %. This is due to the lack of flexibility, brittleness and difficulty in dyeing of fibers made from a single acrylo...

Claims

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Application Information

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IPC IPC(8): D01D5/253D01D5/06D01D10/06D01D11/00D02G1/00D02J1/22D01F6/38
Inventor 李春友孙维波黄振辉董艳刚张立涛施凤海
Owner 浙江杭州湾腈纶有限公司
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