P84 (polyimide) needle felt
P84 polyimide needle felt are excellent high temperature filter media in terms of performance, generally surpassing the other standard media with the exception of PTFE.
Features
Excellent steady under high temperature and resistance to acid
P84 can operate continuously, under practical and low acid working conditions, at temperatures up to 500°F(260 °C).
High filtration efficiency, high tensile strength.
The complex cross sectional shapes create 30-90% more collection surface area when compared to round or oval shaped fibers.
Low back washing pressure, maximum flexibility
The unique tri-lobal fiber structure of P84 provides customers with high efficiency filtration, low pressure drop, and reduced cleaning energy.
Excellent dust cake release
P84 has irregular, tri-lobal fibers that provide better collection efficiencies and enhanced dust cake release properties.
Applications
Incinerator plants
Cement Kiln gas
Low acid coal fired boilers
Asphalt/hot mix plants flue gas
Minerals processing
Soil remediation facilities
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Composition
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P84/P84 scrim
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Weight (g/m2)
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450
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500
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550
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Thickness (mm)
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2.1
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2.3
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2.5
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Air permeability (L/m2/s)
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19
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15
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12
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Tensile strength (N/5X20cm)
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Warp
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650
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700
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800
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Weft
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1150
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1200
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1300
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Tensile elongation (%)
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Warp
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<35
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<35
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<35
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Weft
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<55
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<55
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<55
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Broken strength (Mpa/min)
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2.55
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2.50
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2.40
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Working temperature (℃)
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260
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Short time working temperature (℃)
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280
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Anti-acid
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Excellent
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Anti-alkali
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Fair
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Anti-abrasion
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Excellent
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The stability of water solution
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Medial
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Finishing treatment
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High temperature hot pressing，Singeing
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