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Preparation process of polyacrylonitrile fibers and polyacrylonitrile fibers

A technology of polyacrylonitrile fiber and preparation process, which is applied in the direction of fiber treatment, fiber chemical characteristics, single-component synthetic polymer rayon, etc., which can solve the problem of increasing the production cost of spinning machine, complicated and cumbersome spinning process, and reducing production Efficiency and other issues, to achieve the effect of shortening the production process, ensuring quality and improving production efficiency

Pending Publication Date: 2021-01-22
吉林富博纤维研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the new high-speed spinning machine in the above-mentioned scheme can meet the production demand of acrylic fiber filaments, since a separate washing device and a drying draft roller need to be set between the two spinning rolls, the production cost of the spinning machine is increased. It also makes the entire spinning process complex and cumbersome, reducing production efficiency

Method used

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  • Preparation process of polyacrylonitrile fibers and polyacrylonitrile fibers
  • Preparation process of polyacrylonitrile fibers and polyacrylonitrile fibers
  • Preparation process of polyacrylonitrile fibers and polyacrylonitrile fibers

Examples

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Embodiment 1

[0064] Such as figure 1 As shown, the present embodiment provides a preparation process for polyacrylonitrile fibers, including:

[0065] Spinning the spinning dope through a spinning device;

[0066] The sprayed spinning dope is shaped by a forming device to obtain a tow;

[0067] The formed tow is washed with water and dried to obtain polyacrylonitrile fibers.

[0068] Wherein, the sprayed spinning dope is solidified and formed in the forming device first, and then secondary forming is performed, and a drafting is completed in the process of secondary forming to obtain the formed tow. The formed tow is no longer drawn in the subsequent washing and drying process.

[0069] In order to realize the preparation technology of polyacrylonitrile fiber in the present embodiment, adopt such as Figure 2 to Figure 4 The spinning machine shown carries out the production of polyacrylonitrile fibers. Described spinning machine comprises frame 15, is used for the spinneret device tha...

Embodiment 2

[0133] This embodiment provides a polyacrylonitrile fiber, the breaking strength of the polyacrylonitrile fiber is 2.5-7.0dN.tex.

[0134] The polyacrylonitrile fiber is spinned and formed from the spinning stock solution to obtain tow. During the forming process, the tow is drawn once, and the formed tow is washed with water and dried to obtain polyacrylonitrile fiber.

[0135] In a further solution of this embodiment, the polyacrylonitrile fiber is produced by the preparation process of the polyacrylonitrile fiber described in the first embodiment above.

[0136] Preferably, the fineness of the polyacrylonitrile fiber in this embodiment is 40-320 dtex, and the single-filament fineness is 1-10 dtex.

[0137] More preferably, the polyacrylonitrile fibers are acrylic filaments, and the polyacrylonitrile fibers can be directly used for weaving textile fabrics.

[0138] The polyacrylonitrile fiber of this embodiment has suitable breaking strength and fineness, when the polyacryl...

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Abstract

The invention discloses a preparation process of polyacrylonitrile fibers and the polyacrylonitrile fibers. The preparation process comprises the following steps: spinning a spinning solution througha spinning device; molding the sprayed spinning solution through a molding device to obtain tows; rinsing and drying the formed tows to obtain the polyacrylonitrile fibers, and enabling the sprayed spinning solution to sequentially pass through a coagulating bath tank and a primary rinsing tank in a forming device to obtain molded tows; feeding the tows solidified and molded in the coagulating bath tank into a primary rinsing tank to be subjected to secondary molding, wherein the speed V1 of the tows entering the primary rinsing tank is smaller than the speed V2 of the molded tows leaving theprimary rinsing tank, and drafting is completed in the primary rinsing tank; and maintaining the molded tows at the same advancing speed to obtain the polyacrylonitrile fibers. According to the preparation process, by controlling the advancing speed of the tows in different steps, the whole process flow is only drafted once in the primary rinsing tank, so that the process flow for preparing the polyacrylonitrile fibers is simplified, and the production efficiency of the polyacrylonitrile fibers is improved.

Description

technical field [0001] The invention belongs to the technical field of fiber preparation, and in particular relates to a preparation process of polyacrylonitrile fibers and polyacrylonitrile fibers. Background technique [0002] The polyacrylonitrile fibers currently on the market mainly include acrylic staple fibers, acrylic filaments and polyacrylonitrile-based carbon fiber precursors, all of which have similar production processes. Among them, the difference between acrylic filament and other polyacrylonitrile fibers is that its current application field is mainly textile fabrics. Therefore, the requirements for the uniformity of acrylic filament are high, and the requirements for the stability of its production quality are also higher. . The above-mentioned characteristics have also caused acrylic filaments to be compared with acrylic staple fibers or polyacrylonitrile-based carbon fiber precursors. If the same production process and equipment are used for production, t...

Claims

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Application Information

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IPC IPC(8): D01D5/06D01D5/14D01D10/06D01D10/04D01D10/00D01F6/18
CPCD01D5/06D01D5/14D01D10/06D01D10/04D01D10/00D01F6/18Y02P70/62
Inventor 刘海亮宋德武杨雪峰郑成军张弘邵宝忠马小龙张孝东降磊孟祥化王富余关东雪高嘉徽
Owner 吉林富博纤维研究院有限公司
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