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Method for cleaning para-position aramid fiber strand

A para-aramid fiber and tow technology, applied in the field of man-made fiber preparation, can solve the problems of production capacity impact and contact time extension, and achieve the effect of not affecting the spinning speed

Inactive Publication Date: 2016-08-10
JIANGSU HENGTONG PRINTING & DYEING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no doubt that if the spinning speed is slowed down, the contact time between the washing liquid and the fiber will be relatively prolonged, and the cleaning effect will be improved, but it will affect the production capacity, that is to say, the cleaning effect is inversely proportional to the spinning speed
In view of this, how to find a reasonable balance between the guarantee of spinning speed and the cleaning effect of fibers has long been a technical problem that the industry pays attention to and expects to solve, but it has not been seen in the patent and non-patent literature published so far There are corresponding technical implications

Method used

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  • Method for cleaning para-position aramid fiber strand
  • Method for cleaning para-position aramid fiber strand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The cleaning method of para-aramid fiber tow provided by the invention comprises the following steps:

[0027] A) Equipped with a cleaning and dehydration device, please refer to the structure of the cleaning and dehydration device figure 1 , including washing roller 1, lye washing roller 2, dilute lye washing roller 3, first dehydrator 4, second dehydrator 5 and third dehydrator 6, water washing roller 1, lye washing roller 2 and dilute lye The washing roller 3 is arranged on the frame (not shown) in rotation in a state distributed from left to right, and the first dehydrator 4 is arranged at a position corresponding to the water washing roller 1 and the lye washing roller 2 On the frame, the second dehydrator 5 is arranged on the frame corresponding to the position between the lye washing roller 2 and the dilute lye washing roller 3, and the 3rd dehydrator 6 is arranged on the frame corresponding to the dilute lye washing roller 3. The position on the right is set on...

Embodiment 2

[0032] Only change the root number of one group of upper dewatering rollers 43 into 4 in step A), change the root number of one group of lower dewatering rollers 44 into 3, and change one group of upper and lower dewatering rollers 43,44 change the diameter of the para-aramid fiber tow 7 to 1650dtex in step B), change the washing time to 6S, change the mass % concentration of concentrated sulfuric acid to 99.8%, and change the heating Change the temperature to 78°C, change the mass % specific concentration of the spinning solution to 20%, change the width of the air layer to 12mm, and change the specific logarithmic concentration of the poly-p-phenylene terephthalamide resin solution to 6dl Change the spinning speed of the spinning box to 800m / min; Change the mass % ratio concentration of the lye in step C) to 0.8%, change the time of lye washing to 6S; change the step D) to The mass % specific concentration of the dilute lye is changed to 0.02%, the washing time of the dilute...

Embodiment 3

[0034] Only change the root number of one group of upper dewatering rollers 43 into 9 in step A), change the root number of one group of lower dewatering rollers 44 into 8, and change one group of upper and lower dewatering rollers 43,44 change the diameter of the para-aramid fiber tow 7 to 3300dtex in step B), change the washing time to 1.5S, change the mass % ratio concentration of concentrated sulfuric acid to 100.1%, change the added Change the temperature to 85°C, change the mass % specific concentration of the spinning solution to 19.5%, change the width of the air layer to 8mm, and change the specific logarithmic concentration of the poly-p-phenylene terephthalamide resin solution to 5dl / g; Change the spinning speed of spinning box into 600m / min; Change the mass % ratio concentration of the lye in step C) into 2%, change the time of lye washing into 1.5S; Change step D ) is changed to 0.03% by mass % of the dilute lye, the washing time of the dilute lye is changed to 1....

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Abstract

The invention discloses a method for cleaning para-aramid fiber tow, which belongs to the technical field of man-made fiber preparation. Step: equip a cleaning and dehydration device, the cleaning and dehydration device includes water washing roller, lye washing roller, dilute lye washing roller, first dehydrator, second dehydrator and third dehydrator; The aramid fiber tow is washed when passing through the washing roller, and is dehydrated by the first dehydrator; when the first washed and dehydrated para-aramid fiber tow goes out of the first dehydrator and enters the lye washing roller for lye washing , and enter the second dehydrator for dehydration; when the lye washed and dehydrated para-aramid fiber tow goes out of the second dehydrator and enters the dilute lye washing roller for dilute lye washing, and enters the third dehydrator Dehydration is carried out to obtain the cleaned p-aramid fiber tow. Excellent dewatering effect; find a balance between not affecting the spinning speed, not prolonging the cleaning time and ensuring excellent cleaning and dewatering effect.

Description

technical field [0001] The invention belongs to the technical field of man-made fiber preparation, and in particular relates to a cleaning method of para-aramid fiber tow. Background technique [0002] The chemical name of para-aramid fiber is polyparaphenylene terephthalamide fiber (PPTA fiber), which is formed by dissolving polyparaphenylene terephthalamide polymer powder in concentrated sulfuric acid to form anisotropic And the spinning solution with liquid crystal behavior is sprayed out from the spinneret by the spinning method of dry jet wet spinning, and then coagulated into fiber tow in a special coagulation device with dilute sulfuric acid as a coagulation bath, and then washed, neutralized Blending, drying, stretching or setting, and then oiling and winding to form finished fibers, which are high-strength, high-modulus and high-temperature-resistant fibers. For example, US patent US3767756, US 20130157054 and world patent WO9634732 all describe the preparation met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D10/06
CPCD01D10/06
Inventor 李溶镇陈建云
Owner JIANGSU HENGTONG PRINTING & DYEING GRP CO LTD
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