Production process of PTFE aramid fiber composite high-temperature-resistant needled filter bag

A production process, PTFE technology, applied in the production process of PTFE aramid fiber composite high temperature resistant needle punched filter bags, can solve the problems of baking, uneven heating, unfavorable control, etc., to reduce displacement, improve uniformity, avoid The effect of direct contact

Pending Publication Date: 2022-04-08
ZHEJIANG HEADING ENVIRNMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Moreover, as the coating process of the PTFE film to improve the filtering effect, it is necessary to strictly control the heating temperature and the uniformity of the heating temperature to ensure the degree of adhesion during coating and to achieve the integrity of the filter material after molding. Traditional heating There are electromagnetic heating or steam heating methods, but this heating method is not uniform, which is not conducive to effective control, and there is a phenomenon of burning

Method used

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  • Production process of PTFE aramid fiber composite high-temperature-resistant needled filter bag
  • Production process of PTFE aramid fiber composite high-temperature-resistant needled filter bag
  • Production process of PTFE aramid fiber composite high-temperature-resistant needled filter bag

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Experimental program
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Embodiment 1

[0044] A production process for a PTFE-aramid fiber composite high-temperature-resistant acupuncture filter bag, comprising the following steps: S1, fiber proportioning, and mixing: selecting PTFE short fibers and aramid fibers, and the mixing ratio between the PTFE short fibers and the aramid fibers is: 50:50, mix PTFE short fiber and aramid fiber uniformly, and select PTFE filament base cloth as reinforcement base cloth;

[0045] S2. Opening: The mixed PTFE staple fibers and aramid fibers are fed to the needle opener through the conveying flat curtain, and the needle beater rotates at 200r / min for free opening;

[0046] S3. Carding and laying: the speed of the carding machine is 30m / min. The PTFE short fibers and aramid fiber webs made by the carding machine are laid on the surface of the reinforced base fabric according to the production process. The laying speed is 4m / min. The web feeding mechanism feeds the laid fiber web into the needling area;

[0047] S4. Needling: Th...

Embodiment 2

[0071] The structure of this embodiment and the embodiment are basically the same, the only difference is that the flow regulator 53 in this embodiment includes two parts, the first part is the control valve 530, the second part is the on-off valve 531, the control valve 530 It includes a valve body 60 and a valve core 61 arranged in the valve body 60. The valve core 61 divides the inner cavity of the valve body 60 into an output cavity 601 and a return cavity 602. The valve core 61 includes a table-shaped portion 603 located in the output cavity 601 and Located on the plane portion 604 of the return chamber 602, the inclined surface area of ​​the table portion 603 is smaller than that of the plane portion 604, the valve core 61 is provided with several through holes 605 connecting the output chamber 601 and the return chamber 602, and the valve body 60 is provided with a buffer spring 606 , one end of the buffer spring 606 is in conflict with the valve core 61 , and the other ...

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Abstract

The invention discloses a production process of a PTFE aramid fiber composite high-temperature-resistant needled filter bag, and aims to provide a production process of a needled filter bag with a formed filter material being good in high-temperature-resistant effect, strong in integrity and good in filtering effect, the key points of the technical scheme are as follows: PTFE short fibers and aramid fibers are selected, the mixing ratio of the PTFE short fibers to the aramid fibers is 50: 50, and the PTFE short fibers and the aramid fibers are mixed uniformly; the PTFE short fibers and the aramid fibers are uniformly mixed, the PTFE filament base cloth is selected as the reinforcing base cloth as a main material, and the PTFE short fibers and the aramid fibers are mixed, so that the characteristics of the PTFE short fibers and the aramid fibers are exerted, the overall high temperature resistance of the needled filter bag is improved, the filter precision is high, and the needled filter bag adapts to complex filter working conditions; the invention is suitable for the technical field of filter bag production.

Description

technical field [0001] The invention relates to the technical field of filter bag production, more particularly, to a production process of a PTFE aramid fiber composite high temperature resistant needle punched filter bag. Background technique [0002] The stability at high temperature is the guarantee for the normal use of the filter bag. The base material of the filter bag is mostly made of high temperature resistant materials such as PTFE and aramid fiber. PTFE, commonly known as the king of plastics, is mostly used in extremely harsh environments such as the waste incineration industry. It has good corrosion resistance, high preparation cost and high price. Aramid fiber has better carding and needling reinforcement process adaptability. Aramid fiber is used in high temperature smoke and dust filter bags, which can be used in a high temperature environment of 204 ° C for a long time, with high filtration accuracy and extremely low shrinkage rate. The present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/00B32B38/00B32B37/06B32B37/10B32B37/08B32B41/00B32B27/02B32B27/34B32B27/32B32B27/12B32B5/06
Inventor 王道龙陈斌王玲芸
Owner ZHEJIANG HEADING ENVIRNMENT TECH CO LTD
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