Product Item: Aramid Needle Punched Filter Felt
Product Introduction: In the bags filters industry, the bags always are called hearts. The material of bags will decide what types of gas the filters can deal with. Under the normal working temperature, it only requests the bags to stand for the temperature under 150℃. The material of polyester, polypropylene, polyamide, etc. can be competent. Under the high working temperature, such as Chemical and carbon black (silica arogel) plants off-gases, blast furnace plant gas, cement plant shaft kiln off-gas, calcium carbide plant's shaft kiln off-gas, casting and steel plant off-gas, bituminous concrete and mixes pitch exhaust gas, fire-resistant brick kiln exhaust gas, coking exhaust gas etc., it requests the material can stand for high temperature. First, because the limitation of specific resistance, the electric dust collectors are not suitable, the bags are the only choice. Second, the cost will be very high or because of the space limitation, the temperature is very hard to be lowered to under 150 ℃. Third, because of composition of sulfur in the dust, there will be acid dew point. Therefore, the filtration has to be operated at the temperature above the acid dew point. It requests one type of chemical fiber which can stand for high temperature. We select the Nomex fiber of Du pont. Adopting the international advanced standard, we produce high-temperature needle punched felt.

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Property Index:

composition		Metamex filter material
weight (g/m2)		500
Thickness (mm)		1.7
Air permeability (m3/m2/min		≥15
Breaking strength (N/5*20cm)	warp	≥900
	weft	≥1000
Elongation (%)	warp	≤35
	weft	≤40
tenacity ( Mpa/min )		2.55
Constant working temperature (℃)		≤204
Instant working temperature (℃)		250
Acid resistant		common
Alkali resistant		common
Abrasion resistant		excellent
Hydrolyze stability		common
Finishing treatment		Singed, calendering, or PTFE coating
Temperature (℃)	constant	190
	instant	210