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Teflon film filter paper impregnation sintering and technique of preparing the same

A polytetrafluoroethylene membrane and polytetrafluoroethylene technology are applied in the field of impregnating and sintering polytetrafluoroethylene membrane filter paper and preparation technology, which can solve the problems of frequent replacement, easy deformation, short life and so on, and achieve good corrosion resistance and no durability. Good viscosity and stable performance

Inactive Publication Date: 2008-03-12
新乡市胜达过滤净化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of traditional filter material has poor water resistance, temperature resistance, wear resistance, acid and alkali resistance, dust and oil stain peeling performance, cannot be blown back to clean dust and clean, cannot be used repeatedly, is easy to deform, has a short life, and needs to be replaced. Disadvantages such as frequent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of dipping solution:

[0035] 1) Dilute the polytetrafluoroethylene emulsion with a molecular weight of 2.3 million and an average particle diameter of 1.5-3 microns with water to a solid content of 22-25%;

[0036] 2) Dilute polyethylene glycol with a molecular weight of 200 to 8-10% with water;

[0037] 3) Dimethylacetamide with a molecular weight of 87.12 is diluted with water to 3-5%

[0038] 4) After steps 1), 2), and 3) are completed, add them into the container for stirring according to the ratio of weight 1): 2): 3) = 1: 0.1: 0.05, and then filter through a 200-mesh screen and move to the soaking liquid tank stand-by;

[0039] 2. Dipping:

[0040] Put the traditional filter paper impregnated with phenolic resin into the impregnation tank for full impregnation;

[0041] 3. Send the impregnated filter paper to the roller machine for rolling, squeeze out the excess impregnating liquid in the filter holes, and impregnate a layer of impregnating li...

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Abstract

The present invention discloses a technique to immerse, agglomerate and manufacture a polytetrafluoro ethylene film filter paper. A traditional filter paper is used as a base material and is immersed, rolled, pressed and agglomerated with polytetrafluoro ethylene latex to form the filter paper, the fiber surface of which is enveloped with a polytetrafluoro ethylene film. The present invention is characterized in that the polytetrafluoro ethylene film is 10 to 25 nanometers thick; agglomeration is conducted in three temperature zones; a first temperature zone is 75 to 85 centigrade degrees, a second temperature zone is 115 to 125 centigrade degrees, and a third temperature zone is 145 to 155 centigrade degrees; the total time of agglomeration is five minutes. The present invention basically keeps filtration functions of the original filter paper, and the filtration precision, the ventilation property and other technical indexes are not changed greatly. However, the water resistance, the temperature resistance, the acid, alkali and corrosion resistance, the abrasion resistance, the intensity, and the deformation resistance are greatly promoted. The present invention can be blown reversely to remove the dust, and can be cleaned and used repeatedly. Moreover, a function of water resistance and oil proximity is added for the present invention, so the present invention can be used for water and oil segregation.

Description

Technical field: [0001] The invention relates to a chemical product, in particular to an impregnated and sintered polytetrafluoroethylene membrane filter paper used in various oil product filtration, waste oil regeneration, oil-water separation, air purification, smoke dust control and dust recovery, and its preparation process. Background technique: [0002] With the rapid development of the national economy and the implementation of environmental protection policies and regulations, accelerating technological progress, saving energy, improving efficiency, and protecting the environment have become a basic national policy. At present, among the filter materials used in various fields such as oil purification, air purification, waste oil regeneration, smoke and dust control and dust recovery in China, paper filter materials are the most widely used and most used filter materials. However, this kind of traditional filter material has poor water resistance, temperature resista...

Claims

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Application Information

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IPC IPC(8): B01D39/16B29C67/04B29C70/40B29L31/14
Inventor 马长欢
Owner 新乡市胜达过滤净化技术有限公司
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