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Aramid fiber III on-line thermal treating process and device thereof

A heat treatment device and aramid fiber technology, applied in textiles and papermaking, etc., can solve the problems of difficulty in further improving fiber strength, low fiber crystallinity, and poor fiber crystal orientation.

Inactive Publication Date: 2010-08-11
四川辉腾科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of low fiber crystallinity and poor fiber crystal orientation in the heat treatment of aramid fiber III in the prior art, which make it difficult to further improve the fiber strength, and provide an improved online heat treatment of aramid fiber III method, which can obtain fibers with higher strength and elastic modulus

Method used

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  • Aramid fiber III on-line thermal treating process and device thereof
  • Aramid fiber III on-line thermal treating process and device thereof
  • Aramid fiber III on-line thermal treating process and device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The on-line heat treatment device used in the process listed in this embodiment: includes the first tension roller 3, the first tunnel furnace 5, the second tension roller 6, the second tunnel furnace 7, the third tension roller 8, the oiler 9 and For the dryer 10, the first and second tunnel furnaces are respectively provided with a gas inlet and a heat medium inlet. Both the first tunnel furnace and the second tunnel furnace adopt square tube heating furnaces with an inner cavity width×height of 140×80mm and lengths of 5m and 3m respectively.

[0045] The process of using the aramid III on-line heat treatment device to perform on-line heat treatment on the aramid III fiber bundle includes the following steps:

[0046] (1) Preheating and stretching treatment: After the aramid fiber Ⅲ fiber strand comes out of the spinning and drying section, it is directly wound on the first tension roller, and the tow drawn from the first tension roller is introduced into the first tu...

Embodiment 2

[0053] The online heat treatment device of this example is the same as that of Example 1. Both the first tunnel furnace and the second tunnel furnace adopt square tube heating furnaces with an inner cavity width×height of 140×80mm and lengths of 5m and 3m respectively.

[0054] The process of using the aramid III on-line heat treatment device to perform on-line heat treatment on the aramid III fiber bundle includes the following steps:

[0055] (1) Preheating and stretching treatment: After the aramid fiber Ⅲ fiber strand comes out of the spinning and drying section, it is directly wound on the first tension roller, and the tow drawn from the first tension roller is introduced into the first tunnel furnace. After passing through the cavity of the first tunnel furnace, the fiber III is wound on the second tension roller, and N is passed into the furnace. 2 , heating up to about 190-200°C,

[0056] Adjust the rotating speed of the second tension roller greater than the first t...

Embodiment 3

[0062] The online heat treatment device of this example is the same as that of Example 1. Both the first tunnel furnace and the second tunnel furnace are square-tube heating furnaces with an inner cavity width×height of 140×80mm and lengths of 3m and 2m respectively.

[0063] The process of using the aramid III on-line heat treatment device to perform on-line heat treatment on the aramid III fiber bundle includes the following steps:

[0064] (1) Preheating and stretching treatment: After the aramid fiber Ⅲ fiber strand comes out of the spinning and drying section, it is directly wound on the first tension roller, and the tow drawn from the first tension roller is introduced into the first tunnel furnace. After passing through the cavity of the first tunnel furnace, the fiber III is wound on the second tension roller, and N is passed into the furnace. 2 , the temperature is raised to about 230-240°C to ensure that the fiber is stretched and heated in an oxygen-free state,

...

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Abstract

The invention relates to aramid fiber III on-line thermal treating process and device thereof, which belongs to the technical field of special fiber. The aramid fiber III on-line thermal treating process comprises the following steps of: dividing the thermal treating process into a thermal drawing process and a thermal crystallization process; after aramid fiber III raw filament passes through a spinning drying section, directly winding on a first tension roller without coiling and uncoiling; guiding into a first tunnel furnace, and pretreating in the inert gas atmosphere under the conditions of the temperature of 150-350 DEG C and draw ratio of 1-8%; guiding into a second tunnel furnace, and thermally treating in the inert gas or air under the conditions of the temperature of 360-550 DEG C and no drawing; applying oil to the obtained filament, drying and coiling to obtain the finished fiber with the strength more than 5.15GPa. By arranging a guide-in filament separating device and a guide-out filament separating device at both ends of the tunnel furnace, the invention can carry out thermal treatment on multiple filaments simultaneously, thereby greatly enhancing the production capability and decreasing the energy consumption.

Description

technical field [0001] The invention relates to a heat treatment process and device for aramid fiber III, belonging to the technical field of special fibers. Background technique [0002] Aramid fiber III Fiber on-line heat treatment process and its device Military equipment and civil fields. The Kevlar series products developed by DuPont in the 1960s are one of them, which are formed by polycondensation and spinning of p-phenylenediamine and terephthaloyl chloride. Subsequently, Russia developed Apmoc fiber with better performance in the 1980s. my country also developed a fiber similar to Apmoc in the 1990s, which is called aramid fiber III. [0003] Aramid III fiber is wet-spun from aramid III resin solution co-condensed by p-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole and terephthaloyl chloride. The strength of the raw silk obtained by wet spinning is not high, only 1.5GPa, and further heat treatment is needed to improve the strength. The strength o...

Claims

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Application Information

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IPC IPC(8): D02J1/22D02J13/00D02J3/00
Inventor 张胜才韩和平石和平张鸥
Owner 四川辉腾科技股份有限公司
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