Polyimide filter cloth (PI filter cloth or called P84 filter cloth) is a high-temperature-resistant filtration material made from polyimide fibers — a type of advanced polymer known for exceptional thermal stability, chemical resistance, and mechanical strength. It’s often used in harsh industrial environments where ordinary filter media (like polyester or aramid) would degrade.
Description
Filmedia® is dedicated to providing comprehensive solutions for industrial filtration systems worldwide. We offer a wide range of high-temperature, corrosion-resistant, and high-strength filter fabrics, covering a wide range of operating conditions, from ambient to high temperatures. Our product line includes polyester, polypropylene, PPS, Nomex, P84 (polyimide), PTFE, basalt, aramid, and glass fiber filter media.
Main Features
☑ Excellent Heat Resistance
Continuous working temperature: up to 250 °C
Peak temperature: up to 300 °C
☑ High Dimensional Stability
Maintains shape and strength even under long-term heat exposure.
☑ Chemical Resistance
Excellent resistance to acidic gases, solvents, and oxidation.
Better than aramid (Nomex) in oxidative and high-humidity atmospheres.
☑ Mechanical Strength
Strong tensile and tear strength even at elevated temperatures.
☑ Long Service Life
With proper cleaning cycles, it can last up to 2–3 times longer than aramid or PPS felt in comparable conditions.
Technical Parameters (Typical Values)
| Property | Value |
|---|---|
| Fiber Material | Polyimide (PI) |
| Continuous Temperature | 250 °C |
| Instant Temperature | 300 °C |
| Air Permeability | 120–200 L/m²·s |
| Weight | 450–650 g/m² |
| Surface Finish | Singed, Calendered, PTFE Coated (optional) |
| Chemical Resistance | Excellent to acids & oxidation, moderate to alkali |
Applications
Polyimide filter cloth is widely used in:
☑ Dust Collection
Used in industrial settings for dust filtration, particularly in high-temperature environments such as cement and steel plants.
☑ Chemical Filtration
Utilized in industries where chemical resistance is crucial, like in the pharmaceutical or petrochemical sectors.
☑ Wastewater Treatment
Employed in filtration systems where resistance to high temperatures and chemical exposure is required.
