Preparation method of pyrohydrolysis-resistant meta-position aramid fiber material

A kind of aramid fiber, high temperature resistant technology, applied in the field of preparation of meta-aramid fiber filter material resistant to high temperature hydrolysis, can solve the problems such as hydrolysis resistance, water and oil repellency, etc., to prevent hydrolysis reaction and prolong service life. Effect

Active Publication Date: 2012-08-08
江苏东方滤袋股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the shortcomings of the existing technology of meta-aramid fiber filter material, which are not resistant to hydrolysis and have poor water and oil repellency, the purpose of the present invention is to provide a method for preparing a high-temperature hydrolysis-resistant meta-aramid fiber filter material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The green body of the meta-aramid fiber filter material strengthened by needle punching is sprayed and suctioned to remove dust, pad-rolled with high-temperature-resistant hydrolysis finishing solution, and then pre-baked and baked to make high-temperature hydrolysis-resistant meta-aramid Fiber filter material. The specific process parameters are: (1) Preparation of the filter body: the surface density is 185g / m made of meta-aramid fiber 2 Upper and lower fiber layers, with a surface density of 120g / m 2 The middle layer of the meta-aramid yarn woven base cloth forms the green body of the meta-aramid fiber filter material, and its surface density is 490g / m 2 , the thickness is 2.2mm, the longitudinal breaking strength is 1215N, the longitudinal breaking elongation is 25%, the transverse breaking strength is 1326N, the transverse breaking elongation is 32%, and the grades of water spraying, water repellency and oil repellency are all grade 0; (2) Preparation High temper...

Embodiment 2

[0045] The green body of the meta-aramid fiber filter material strengthened by needle punching is sprayed and suctioned to remove dust, pad-rolled with high-temperature-resistant hydrolysis finishing solution, and then pre-baked and baked to make high-temperature hydrolysis-resistant meta-aramid Fiber filter material. The specific process parameters are: (1) Preparation of the filter body: the surface density of 200g / m is made of meta-aramid fiber 2 Upper and lower fiber layers, with a surface density of 130g / m 2 The middle layer of the meta-aramid yarn woven base cloth forms the green body of the meta-aramid fiber filter material, and its surface density is 530g / m 2 , the thickness is 2.6mm, the longitudinal breaking strength is 1263N, the longitudinal breaking elongation is 29%, the transverse breaking strength is 1514N, the transverse breaking elongation is 35%, and the grades of water spraying, water repellency and oil repellency are all grade 0; (2) Preparation High tem...

Embodiment 3

[0047]The green body of the meta-aramid fiber filter material strengthened by needle punching is sprayed and suctioned to remove dust, pad-rolled with high-temperature-resistant hydrolysis finishing solution, and then pre-baked and baked to make high-temperature hydrolysis-resistant meta-aramid Fiber filter material. The specific process parameters are: (1) Preparation of the filter body: using meta-aramid fiber to obtain a surface density of 225g / m 2 Upper and lower fiber layers, with a surface density of 150g / m 2 The middle layer of the meta-aramid yarn woven base cloth forms the green body of the meta-aramid fiber filter material, and its surface density is 600g / m 2 , the thickness is 3.1mm, the longitudinal breaking strength is 1362N, the longitudinal breaking elongation is 32%, the transverse breaking strength is 1682N, the transverse breaking elongation is 38%, and the grades of water spraying, water repellency and oil repellency are all grade 0; (2) Preparation High t...

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Abstract

The invention relates to a preparation method of a pyrohydrolysis-resistant meta-position aramid fiber material. The preparation method is characterized in that: a meta-position aramid fiber three-layer structural body made by adopting a no-weaving technology is taken as a filter material green body, the meta-position aramid fiber three-layer structural body is subjected to padding by pyrodydrolysis-resistant finishing liquor which contains polytetrafluoroethylene and epoxy phenolic resin mainly and then is subjected to low temperature antimigrant primary drying and high temperature crosslinking, thus a membrane structure which is completely coated and is uniformly distributed with polytetrafluoroethylene particles, high temperature water vapor is isolated from contacting fibers, retention rate of longitudinal and transverse breaking forces of hydrolysis at higher continuous working temperature are 100-107%, water repellency level and oil repellency level are obviously improved, the filter material is difficult to damage, is easy to clean ash, does not paste bag and does not harden, differential pressure of a dust removal system is small, service life of a filter bag is prolonged, and the filter material can be widely applied to high temperature flue gas dedusting and filtering of steel and iron, electricity generation, cement, a coal-fired boiler and the like. The preparation method disclosed by the invention can directly use the traditional production equipment and has a simple process and low production cost.

Description

technical field [0001] The invention relates to a method for preparing a meta-aramid fiber filter material, in particular to a method for preparing a high-temperature hydrolysis-resistant meta-aramid fiber filter material. The prepared filter material is hydrolysis-resistant and repellent under high-temperature conditions The water and oil repellency performance is significantly improved, so that the filter material is not easy to be damaged, easy to clean dust, no bag sticking, no hardening, and the pressure difference of the dust removal system is small, which can be widely used in high temperature flue gas dust removal and filtration of steel, power generation, cement, coal-fired boilers, etc. . Background technique [0002] The bag filter is one of the environmental protection equipment for high-temperature flue gas purification and filtration, and the filter bag is the core component of the bag filter, and the filter material is the main raw material for the filter bag....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/256D06M15/55D06M15/263D06M13/513D06M15/333D06M15/643B01D39/16B32B27/12D06M101/36
Inventor 张旭东吴海波金平良殷保璞王洪王荣武黄健华王玉欣张楠
Owner 江苏东方滤袋股份有限公司
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