P84 (polyimide) Needle Felt
P84 (polyimide) needle felt is excellent high temperature filter media in terms of performance, generally surpassing the other standard media with the exception of PTFE.
Features
· Excellent stability 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,excellent 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.
Disadvantages
- Fair resistance to alkali
Applications
- Incinerator plants,
- Cement Kiln gas
- Low acid coal fired boilers
- Asphalt/hot mix plants flue gas
- Minerals processing
- Soil remediation facilities
Compositions | P84/ PTFE scrim |
Weight (g/m2) | 500 |
Thickness (mm) | 2.2 |
Permeability (L/m2/s) | 200-300 |
Tensile strength(N/5 20cm) | Warp | 800 |
Weft | 1000 |
Tensile Elongation (％) | Warp | <35 |
Weft | <55 |
Working Temperature(℃) | ≤ 260 |
Short time Working temperature(℃) | 280 |
Anti-acid | Excellent |
Anti-alkali | Fair |
Anti-abrasion | Excellent |
The stability of water solution | Medial |
Finishing treatment | High temperature hot pressing，Singeing |
