| P84 polyimide needlefelts are excellent high temperature filter media in terms of performance, generally surpassing the other standard media with the exception of PTFE.
P84 Fiber 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 strengh
- The complex cross sectional shapes create 30-90％ more collection surface area when compared to round or oval shaped fibers.
- Low back washing pressure, maximun 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
- Lowacid coal fired boilers
- Asphalt/hot mix plants flue gas
- Minerals processing
- Soil remediation facilities
|
Compositions
|
P84/P84 scrim
|
P84/galss scrim
|
|
Weight (g/m2)
|
450
|
500
|
550
|
800
|
850
|
900
|
|
Thickness (mm)
|
2.1
|
2.3
|
2.5
|
2.5
|
2.8
|
3.0
|
|
Permeability (m3/m2/min)
|
19
|
15
|
12
|
16
|
13
|
10
|
|
Tensile strength(N/5 20cm)
|
Warp
|
650
|
700
|
800
|
1800
|
1800
|
1800
|
|
Weft
|
1150
|
1200
|
1300
|
1800
|
1800
|
1800
|
|
Tensile Elongation (％)
|
Warp
|
<35
|
<35
|
<35
|
<10
|
<10
|
<10
|
|
Weft
|
<35
|
<35
|
<35
|
<10
|
<10
|
<10
|
|
Broken strength
(Mpa/min)
|
2.55
|
2.50
|
2.40
|
3.20
|
3.10
|
2.95
|
|
Working Temperature(℃)
|
≤ 260
|
≤ 260
|
|
Short time Working temperature(℃)
|
280
|
280
|
|
Anti-acid
|
Excellent
|
Excellent
|
|
Anti-alkali
|
Fair
|
Fair
|
|
Anti-abrasion
|
Excellent
|
Excellent
|
|
The stability of water solution
|
Medial
|
Medial
|
|
Finishing treatment
|
High temperature hot pressing，Singeing
|
High temperature hot pressing，Singeing, membrane.
|
|
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