P84 needle felt
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P84 needle felt

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P84 polyimide needlefelt filter cloth is a top-notch filter material that excels in high temperature conditions, outperforming most other standard media except for PTFE.


• Exceptional stability and acid resistance at high temperatures.

• P84 can endure continuous operation at temperatures up to 500°F (260 °C) in practical, low acid environments.

• Offers high filtration efficiency and tensile strength.

• The unique shape of the P84 fibers provides 30-90% more surface area for collection compared to round or oval fibers.

• Requires low pressure for backwashing and offers maximum flexibility.

• The tri-lobal fiber structure of P84 enables high efficiency filtration, reduced pressure drop, and less cleaning energy.

• Boasts excellent dust cake release properties due to its irregular, tri-lobal fibers.


• Ideal for use in incinerator plants.

• Suitable for filtering cement kiln gas.

• Effective in low acid coal fired boilers.

• Suitable for capturing flue gas in asphalt/hot mix plants.

• Useful in minerals processing.

• Applicable in soil remediation facilities.

Fiber Characteristic

Tensile Strength
Chemical Acids Alkali Resistance Supports Combustion Continuous Temp(℃) Surge Temp (℃)
 Polypropylene Excellent Excellent Excellent Excellent Yes  93  93 
 Nylon Excellent Excellent Poor  Excellent Yes  93  93 
Good  Good  Very Good  Fair  Yes  127  140 
 Copolymer Acrylic Average  Fair  Good  Fair  Yes  110  120 
 Polyester Excellent Excellent Fair  Fair  Yes  135  149 
Aramid Very Good  Excel  Fair  Poor  NO 191  218 
PTFE Average  Fair  Excellent Excellent NO 232  260 
 Fiberglass Excellent Fair  Good  Fair  NO 260  288 
PPS Very Good  Excel  Excellent Very Good  NO 191  218 
P-84 Very Good  Excel  Very Good  Fair  NO 260  288 

Layer: P84

Scrim: P84

Available weight: 500g/m2, 550g/m2, 600g/m2

Treatment: PTEF finish, e-PTFE membrane laminated

Service temperature: 240℃ continue, 260℃ maximum

Regular width: 2m-2.2m

Application: Waste incineration, Chemical, etc.

Filter Media Roll goods for Dust filtration

• Needle felt with and without e-PTEF membrane

• Material weight from 250g/m2 to 1000g/m2

• Roll length from 50m to 300m

• Shortest delivery time

• Customized and developed products as customer’s request


For more than 20 years, Hongyuan Envirotech Co., Ltd. has been a leading manufacturer of filter material and filter bags for dust filtration industry. Hongyuan Envirotech has been committed to providing customers best filter material with comprehensive cost performance.

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 No.105, South of Binhai Road, Xishi Dist, Yinkou, Liaoning, China
 +86-150-4179-9965
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