P84 filter bag
Engineered for Extreme Heat & Corrosive Environments
P84 filter bag
P84 Filter Bag (Polyimide Needle Punched Felt Filter Bag) is a high-end high-temperature resistant dust filtration material, made from polyimide (P84) fibers produced by Austria’s LENZING company through needle punching process. Its unique irregular leaf-shaped fiber cross-section significantly increases the fiber surface area, providing numerous tiny pores for excellent surface filtration performance, where dust primarily stays on the filter surface for easy cleaning.
- Outstanding High-Temperature Resistance: Continuous operating temperature up to 260°C, instantaneous up to 280°C, suitable for harsh high-heat conditions.
- Excellent Chemical Resistance: Good acid and alkali resistance (pH 2-12 range), strong anti-oxidation and anti-corrosion properties, with certain hydrolysis resistance.
- High Filtration Efficiency: Superior fine dust capture, low emission concentration, low cleaning pressure, easy cake release, and minimal operating pressure drop.
- Abrasion and Fold Resistant: High fiber strength, long service life, ideal for pulse jet dust collectors.
Product Specifications
| Parameter | Value / Range | Notes |
|---|---|---|
| Material | 100% Polyimide (P84) fiber | Supported with P84 or PTFE scrim |
| Weight (Gram Weight) | 450-650 g/m² (commonly 500-550 g/m²) | |
| Thickness | 2.0-2.6 mm | |
| Operating Temperature | Continuous: 240-260°C Peak/Instantaneous: 260-280°C | |
| Air Permeability | 130-180 L/dm²/min (at 200 Pa) | |
| Tensile Strength | Warp: ≥800-1200 N/5×20cm Weft: ≥1000-1600 N/5×20cm | |
| Filtration Efficiency | ≥99.99% (for fine particles) | Emission ≤30 mg/Nm³ |
| Chemical Resistance | Excellent acid/alkali resistance (pH 2-12) Good oxidation resistance Limited hydrolysis resistance |
Lean Intelligent Manufacturing
Raw Material Selection
Mixing and Pretreatment
Intelligent Spinning & Web Formation
Precision Needle Punching Molding
Heat Setting
Singeing Treatment
Membrane Lamination
water/oil repellency
Filter bag processing details
High quality seam designed for lowest emissions
Top and Bottom Configurations
Support Rings
Filter bag sewing technology
Pinhole Sealing Technology
Seamless Sewing Technology
TAP Lamination Technology
Application Industries
Widely used in waste incineration, coal-fired boilers, cement kiln tails, asphalt mixing plants, steel metallurgy, carbon black plants, waste incinerators, and other high-temperature, high-humidity, acidic, or corrosive flue gas environments.
Steel & Metallurgy
Cement & Building Materials
Power Generation
Waste Incineration
Chemical & Mining
Asphalt Mixing Plants
Related Products
We also provide various high-quality filter cages, filter bags, and other accessories to offer you a one-stop dust removal solution.
Our Manufacturing Strength
As a leading manufacturer of industrial filtration media in China, we have 20+ years of industry experience, a 27,000㎡ modern production facility, and 8 advanced production lines, with an annual output of over 2 million filter bags. Certified with ISO9001, ISO14001, and ISO45001, our products are exported to 40+ countries and regions.
1
Years of Serving Customers
1
㎡ – Modern Production Base
1
Customers Worldwide
1
exporting country
3,000,000 pcs
Annual Filter Bag Production
- Automatic Multi-Task Production Lines
- Precision Sewing
- Heat Sealing
- Pinhole Sealing
- Seam Lamination
2,000,000 m
Annual Cage Production
- Filter Cages of All Shapes & Sizes
- Cage Treatments
- Silicone Coating
- Galvanizing
- Passivation (stainless steel)
Warehouse & Stock
Quality Control
Raw material quality control
The raw materials of Aokai have undergone tests for 13 indicators in the laboratory, including fiber composition, air permeability, breaking strength and elongation at break, thermal shrinkage, moisture regain, oil content, and fiber melting point, with all test standards surpassing the relevant criteria.
Production process quality control
The factory has obtained ISO9001 and ISO14001 certifications. It operates in accordance with the 7S management standards, strictly controls product quality in line with international high-end product testing standards, retains inspection records for more than 3 years and electronic records permanently, ensuring the traceability of each batch of products.
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