Hot water drawing groove for spinning and manufacturing method and application thereof

A technology of hot water and drafting, which is applied in wet spinning, stretch spinning, textiles and papermaking, etc. It can solve the problems of broken filaments, raw filaments and raw filaments wrapped around rolls, etc., to reduce disturbance, The effect of ensuring uniformity

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the air bubbles in the hot water drawing tank in the prior art disturb the polyacrylonitrile precursor, the temperature field is uneven, there are many filaments in the precursor, there are many broken filaments, and the precursor is entangled. For the problem of rolls, a hot wat

Method used

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  • Hot water drawing groove for spinning and manufacturing method and application thereof
  • Hot water drawing groove for spinning and manufacturing method and application thereof

Examples

Experimental program
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Example Embodiment

[0037] [Example 1]

[0038] 1. Preparation of stock solution: Distilled acrylonitrile (AN) and itaconic acid (IA) in proportion of 97:3, solid content 20%, azobisisobutyronitrile (AIBN) accounts for 0.4wt% of the comonomer, Using dimethyl sulfoxide (DMSO) as a solvent was added to the reactor, and reacted at a constant temperature of 59° C. for 20 hours under the protection of nitrogen to obtain a spinning solution of a binary acrylonitrile copolymer. Then, after the spinning solution is decompressed to remove residual monomers and bubbles, it is filtered through a 5 μm filter material to obtain an acrylonitrile copolymer spinning dope. After testing, the molecular weight is 80021, the molecular weight distribution is 3.34, and the viscosity is 75 Pa·S at 60°C.

[0039] 2. Coagulation: The spinning dope is measured by a metering pump, filtered again by 3μm, and then extruded through the spinneret into the first coagulation bath. The temperature of the coagulation bath is 20℃, the ...

Example Embodiment

[0047] [Example 2]

[0048] 1. Preparation of stock solution: Distilled acrylonitrile (AN) and itaconic acid (IA) in proportion of 97:3, solid content 20%, azobisisobutyronitrile (AIBN) accounts for 0.4wt% of the comonomer, Using dimethyl sulfoxide (DMSO) as a solvent was added to the reactor, and reacted at a constant temperature of 59° C. for 20 hours under the protection of nitrogen to obtain a spinning solution of a binary acrylonitrile copolymer. Then, after the spinning solution is decompressed to remove residual monomers and bubbles, it is filtered through a 5 μm filter material to obtain an acrylonitrile copolymer spinning dope. After testing, the molecular weight is 80021, the molecular weight distribution is 3.34, and the viscosity is 75 Pa·S at 60°C.

[0049] 2. Coagulation: The spinning dope is measured by a metering pump, filtered again by 2μm, and then extruded through the spinneret into the first coagulation bath. The temperature of the coagulation bath is 25℃, the ...

Example Embodiment

[0057] [Example 3]

[0058] 1. Preparation of stock solution: Distilled acrylonitrile (AN) and itaconic acid (IA) in proportion of 97:3, solid content 20%, azobisisobutyronitrile (AIBN) accounts for 0.4wt% of the comonomer, Using dimethyl sulfoxide (DMSO) as a solvent was added to the reactor, and reacted at a constant temperature of 59° C. for 20 hours under the protection of nitrogen to obtain a spinning solution of a binary acrylonitrile copolymer. Then, after the spinning solution is decompressed to remove residual monomers and bubbles, it is filtered through a 5 μm filter material to obtain an acrylonitrile copolymer spinning dope. After testing, the molecular weight is 80021, the molecular weight distribution is 3.34, and the viscosity is 75 Pa·S at 60°C.

[0059] 2. Coagulation: The spinning dope is measured by a metering pump, filtered again by 3μm, and then extruded through the spinneret to enter the first coagulation bath. The temperature of the coagulation bath is 48℃, ...

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Abstract

The invention relates to hot water drawing groove for spinning and a manufacturing method and application thereof. The hot water drawing groove primarily aims to address the problem of too many fuzzy yarns and too many broken yarns, and fiber twisting roller phenomenon caused by bubble stirring and uneven temperature field in the course of prior art methods for hot water drawing. The hot water drawing groove includes an eyelet plate, at least two eyelet plate supports, a main body groove body, an interlayer filling material for the main body groove body, an exit for a heating medium, a heating coil pipe and an entrance of the heating medium, wherein the eyelet plate supports are placed within the main body groove body, and the eyelet plate is placed on the eyelet plate supports. The heating medium goes in and out of the heating coil pipe through the entrance and exit of the heating medium. The technical solution of the invention better addresses the problem and can be used in the course of producing poylacrylonitrile precursors which relates to hot water drawing.

Description

technical field [0001] The invention relates to a spinning device for producing polyacrylonitrile-based carbon fiber precursors, in particular to a hot water drawing tank involving a hot water drawing process. Background technique [0002] PAN-based carbon fiber is a synthetic inorganic fiber. It is a fibrous polymer obtained from acrylonitrile and comonomer through a series of processes such as polymerization, spinning, pre-oxidation and carbonization. During the spinning process, the PAN molecules mainly undergo physical changes to form white fibrous precursors. During the pre-oxidation process, the PAN precursors gradually evolve into a heat-resistant oxygen-containing structure. carbon fiber. Because carbon fiber has high specific strength, high specific modulus, high temperature resistance and chemical corrosion resistance, it has a wide range of applications. [0003] The preparation of polyacrylonitrile raw silk involves two major processes: the preparation of the ...

Claims

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Application Information

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IPC IPC(8): D01D5/06D01D5/12D01D5/096D01D13/02D01D10/00
Inventor 王贺团李磊沈志刚赵微微肖士洁
Owner CHINA PETROLEUM & CHEM CORP
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