Polyimide / P84 Needle Felt Filter Cloth Acupuncture Weaving method

Polyimide/ P84 Needle Felt Filter Cloth/ P84 Filter Bags

When the temperature of the dust air more than 250 degree C and the dust can not be collected through ESP, then as usual we have to reduce the temperature of the dust air and make it possible to be purified through bag type dust collectors, but the investment will increase much when this happen.

Due to the fiber glass is fragile and PTFE fiber with a higher heat shrinkage and weak cohesion, for meeting the high filter efficiency, both of them need to be laminated with PTFE membrane, which will increase the resistance of the bag filter houses and lower the air/cloth ratio of course, so the polyimide filter cloth (can be P84 filter cloth, PI needle felt) will become to the first option.

Polyimide filter cloth/ P84 needle felt filter cloth/ P84 filter bags

Polyimide needle felt filter cloth / polyimide filter bags (can be P84 needle felt filter cloth, Yilun needle felt) with the properties of good high temperature resistance, acid resistance and inflammable, the tri-leaf structure of the fiber helps the polyimide needle felt filter cloth with a much larger filter surface and with a much higher filter efficiency, which is an ideal filter material.

Material: polyimide fiber (can be P84, Yilun), supported with polyimide scrim (P84 scrim, Yilun scrim / PTFE scrim
Weight:450~650g/sq.m
Operation Temperature: Continues: ≤240℃; Peaks: 260℃
Surface treatment available: singed & glazed, heat set, PTFE suspension bath, PTFE membrane.
HEADING can customize the products according to the requirements from the clients!

Properties

1. High temperature resistance: Recommended continuous operation temperature: ≤240 degree C ; instant peaks: 260 degree C.
2. Stable size under high temperature after heat setting treatment: at the 260 degree C , the shrinkage not exceed 1%.
3. Fire proof.
4. Good abrasion and folding resistance, acid resistance.
5. High filter efficiency and long service life.

Polyimide/ P84 Needle Felt Filter Cloth/ P84 Filter Bags Main Applications

Metallurgy industries: such as blast furnace exhaust gases purification for steel plant, etc.
Chemical industries: such as the flue gas from the kiln for the calcium carbide production, dust air purification from carbon back plants, etc.
Building material industries: such as the dust air filtration from kiln of cement plants, the dust air filtration in asphalt mix station, etc.
And some other plants for boiler’s flue gas purifying, such as thermal power plants, etc.