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Combined cleaning method for spinneret plate

A spinneret and combined technology, which is applied in the direction of spinneret assemblies, textiles and papermaking, etc., can solve the problems that are not conducive to continuous spinning, and achieve the effects of reduced yarn breakage, less wool and good technical effects

Inactive Publication Date: 2016-06-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spinning dope containing too much ultra-high molecular weight tends to produce a gel structure, which is not conducive to continuous spinning

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Remove the spinneret from the spinning assembly of wet spinning, immerse the spinneret covered with spinning solution in a solution containing dimethyl sulfoxide with a mass concentration of 95% for 3 minutes, take out the spinneret, and Tear off the solidified spinning solution on both sides; then put the spinneret into a container filled with dimethyl sulfoxide, put the container into an ultrasonic water bath with heating function, and clean it three times at an ultrasonic frequency of 130KHz. 5 minutes each time, each time the cleaning temperature is 60°C; then put the spinneret into the blast oven to dry, the drying temperature is 95°C, and the drying time is 3 minutes; finally, it is made of stainless steel sintered material with a filtration accuracy of 10μm. The compressed air filtered by the formed filter element was blown toward the outer surface of the spinneret for 3 minutes. Complete the cleaning process of the spinneret. The total cleaning time is 24 minut...

Embodiment 2

[0022] Remove the spinneret from the spinning assembly of dry-jet wet spinning, immerse the spinneret covered with spinning solution in a solution containing dimethylformamide with a mass concentration of 50% for 15 minutes, and take out the spinneret Tear off the solidified spinning solution on both sides of the spinneret; then put the spinneret into a container filled with dimethylformamide, and put the container into an ultrasonic water bath with heating function for cleaning. The ultrasonic frequency is 25KHz, and the cleaning time is 1 times, each time for 20 minutes, each time the cleaning temperature is 25 ° C; then put the spinneret into the blast oven to dry, the drying temperature is 50 ° C, and the drying time is 5 minutes; Compressed air filtered by a filter element made of stainless steel sintered material was blown toward the outer surface of the spinneret for 5 minutes. Complete the cleaning process of the spinneret. The total cleaning time is 45 minutes. Spinn...

Embodiment 3

[0024] Remove the spinneret from the spinning assembly of dry-jet wet spinning, immerse the spinneret covered with spinning solution in a solution containing dimethylacetamide with a mass concentration of 80% for 10 minutes, and take out the spinneret Tear off the solidified spinning solution on both sides of the spinneret; then put the spinneret into a container filled with dimethylacetamide, and put the container into an ultrasonic water bath with heating function for cleaning, the ultrasonic frequency is 75KHz, and the cleaning time is 2 times, each time for 5 minutes, each time the cleaning temperature is 50 ° C; then put the spinneret into the blast oven for drying, the drying temperature is 80 ° C, and the drying time is 3 minutes; finally, use stainless steel with a filtration accuracy of 3 μm Compressed air filtered through a filter element made of sintered material was blown against the outer surface of the spinneret for 1 minute. Complete the cleaning process of the ...

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PUM

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Abstract

The invention relates to a combined cleaning method for a spinneret plate with the aim of solving technical problems in the prior art such as long cleaning time, incomplete cleaning, high rate of plugged holes of the spinneret plate and many broken filaments of original filaments. The combined cleaning method for the spinneret plate is adopted and comprises following steps: detaching the spinneret plate on a spinning assembly, soaking the spinneret plate dipped with spinning solution to solidified solution, taking out the spinneret plate after spinning solution of the spinneret plate is solidified and tearing off solidified spinning solution on the spinneret plate; putting the spinneret plate into a container holding a cleaning solvent and putting the container into an ultrasonic water bath for cleaning; and putting the cleaned spinneret plate into an air-blast drying box for drying; and finally, utilizing gas filtered by a filter core of certain filter precision to blow and sweep the dried spinneret plate for less than 1min. The technical scheme of the combined cleaning method for the spinneret plate helps solve the problem and can be used for the equipment cleaning process following spinning of original filaments polyacrylonitrile.

Description

technical field [0001] The invention belongs to a cleaning method for spinning equipment, in particular to a cleaning method for a spinneret used for producing polyacrylonitrile fibers. Background technique [0002] Polyacrylonitrile-based carbon fiber has the advantages of high specific strength, high specific modulus, high temperature resistance, corrosion resistance and good weaving performance, so it is widely used in many fields such as sports equipment, construction engineering, oil exploration and aerospace. The production process of polyacrylonitrile-based carbon fiber is a systematic and lengthy process, including spinning, pre-oxidation and carbonization. This involves a lot of equipment, including textile equipment and high-temperature treatment equipment. [0003] For fiber quality, the quality of spinning equipment is very important, especially carbon fiber. Such high-quality special fibers are a formidable challenge for spinning equipment. In the spinning equ...

Claims

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Application Information

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IPC IPC(8): D01D4/04
Inventor 王贺团沈志刚李磊肖士洁
Owner CHINA PETROLEUM & CHEM CORP
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