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PTFE Needle Felt Dust Filter Bag
PTFE needle  felt could resist 240 ~ 260 degrees temperature, good chemical stability, expansion rate, resistance to acid alkali and high temperature.Compared with other high temperature resistant material, the cost is low.Mainly used in chemical industry, steel, metallurgy, carbon black, power generation, cement and other industrial kiln  temperature flue gas filtration.In the surface of the needle felt can do corresponding post-processing according to different work environment.
1. The inferior smooth processing.
Pressure light processing dust particles have attached in dust particles or other characteristics of the contact with other surfaces. When suspended dust particles come into contact with each other, mutual adsorption and together. The dust motes of cohesion and the type, shape, size distribution, moisture content, surface features a variety of factors, such as rest Angle characterization are available, and generally is 30 ° to 45 °, rest Angle is less than 30 ° as low adhesion, good liquidity, singeing process on the surface used for such dust filter material, in order to improve the surface area of the filter material, increase the rate of filter material of dust catcher, as well as to when the ash removal will blow out the dust from the filter material deep;Rest Angle 45 ° called high adhesion, liquidity is poor, for such dust use pressure light processing filter material on the surface, in order to improve the surface smoothness of the filter material increase the rate of filter material surface of dust catcher, prevent the dust filter material after deep ash removal difficult.
 
2. The antistatic treatment
Scattered in the air (or gas) some of the dust in the concentration of the specific conditions, spark burning will happen. So for flammable and explosive dust should be chosen by the anti-static anti-static filter cloth filter cloth processing is to point to in the filter cloth fiber mixed with conductive fiber, make its have the conductivity in three-dimensional space is (body resistance is less than 10 e7 Ω). Commonly used conductive fiber with stainless steel fiber and modified permeability coal chemical fiber. The stainless steel fiber conductive performance is stable and reliable, after a certain time on the modification of chemical fiber in conductive performance decline.
 
3. Water and oil proof 
Wet dust (especially for water imbibition, gas dust deliquescence) can make the capture the surface of the filter bag dust wetting binding, even cause paste bag. This is the  taboo of bag filter. So the filter cloth for waterproof and oil processing, make its have the hydrophobic every single fiber abhorred oily, thus increasing the surface tension of the filter material. Can effectively make the combination of condensation water and ash into bead, not permeate to the filter material, off to avoid filtering capillary channel paste bag due to condensation phenomenon.
 
4. Easy cleaning treatment
The nature of the dust of the ground and pecked and dust particles, morphology, and carrying a mote of dust concentration airflow speed and other factors. Rough surface tip prismatic irregular particle is larger than smooth surface shape grinding peck of particle 10 times. Particle size is about 90 microns wear of dust particles is the larges, when particle size reduced to 5-10 microns wear resistance is very weak. Aluminum powder, silicon powder, carbon powder and sintering ores belong to high wear and tear "dust. For grinding peck dust, easy to ash treatment  choose to wear good filtering cloth. Surface of silicon oil graphite, ptfe PVC resin Yi Qing as treatment can improve the wear resistance of filter material such as folding resistance.
 
5. Teflon coated processing when the dust particle size less than 1 micron, or has a great deal of sticky dust, or containing gas humidity is bigger, average filter material can't effectively filter. With ptfe (teflon ®) as the raw material of composite microporous membrane filter material, has the very high filtration precision, smooth surface, not adhesive dust, soot dust easily not penetrating inside the filter material, surface filtering