PTFE Blended Needle Felt
PTFE blended needle felt is engineered for medium to high-temperature industrial filtration, combining PTFE fibers with P84 (PI) or PPS to achieve excellent chemical resistance, thermal stability, and long service life in corrosive gas environments.
Description
PTFE + P84 / PTFE + PPS High-Temperature & Corrosion-Resistant Filter Media
Product Overview
PTFE blended needle felt is a high-performance filtration media engineered with PTFE fibers as the primary chemical-resistant backbone, blended with P84 (PI) or PPS fibers to achieve an optimized balance between temperature resistance, chemical stability, mechanical strength, and service life.
This filter media series is designed for medium to high-temperature industrial gas filtration, particularly in applications involving corrosive gases, acidic environments, and continuous operation baghouse systems.
By selecting different fiber systems and blend ratios, the media can be tailored to meet varying process conditions and cost-performance requirements.
Material System Options for PTFE Blended Needle Felt
PTFE blended needle felts are available in two fundamental material systems, each targeting different operating conditions.
PTFE + P84 Blended Needle Felt for High-Temperature Filtration
- PTFE fibers provide excellent chemical inertness and resistance to acids and alkalis
- P84 (polyimide) fibers enhance thermal stability and oxidation resistance
- Recommended for high-temperature, high-oxygen, and strongly corrosive environments
PTFE + PPS Blended Needle Felt for Corrosive Gas Filtration
- Combines PTFE chemical resistance with PPS mechanical stability and cost efficiency
- Suitable for medium to high-temperature applications with controlled oxygen levels
- Offers a balanced solution between performance and operating cost
Technical Data – PTFE / P84 Blended Needle Felt
General Properties
| Item | Unit | Value |
|---|---|---|
| Product Name | — | 80% PTFE / 20% P84 Impregnated Needle Felt |
| Model | — | PTFE-650g |
| Fiber Composition | — | 80% PTFE + 20% PI (P84) fibers / PTFE scrim |
| Weight | g/m² | 650 ±20 |
| Thickness | mm | 0.9 – 1.1 |
| Chemical Treatment | — | PTFE impregnation |
| Air Permeability @200 Pa | L/dm²/min | 120 – 150 |
Mechanical Properties
| Item | Unit | MD | CD |
|---|---|---|---|
| Tensile Strength | N / 25 mm | ＞900 | ＞900 |
| Elongation at Break | % | ≤15 | ≤15 |
Thermal Properties
| Item | Condition | MD | CD |
|---|---|---|---|
| Thermal Shrinkage | 260 °C | ＜2% | ＜2% |
Technical Data – PTFE / PPS Blended Needle Felt
General Properties
| Item | Unit | Value |
|---|---|---|
| Product Name | — | PTFE-PPS Filter Media |
| Model | — | PTFE-PPS |
| Fiber Composition | — | 50% PTFE + 50% PPS fibers / PTFE scrim |
| Weight | g/m² | 600 ±5% |
| Thickness | mm | 1.5 ±0.2 |
| Chemical Treatment | — | PTFE impregnation |
| Air Permeability @200 Pa | L/dm²/min | 90 – 140 |
Mechanical Properties
| Item | Unit | MD | CD |
|---|---|---|---|
| Tensile Strength | N / 50 × 200 mm | ≥900 | ≥1200 |
| Elongation at Break | % | ≤25 | ≤45 |
Thermal Properties
| Item | Condition | MD | CD |
|---|---|---|---|
| Thermal Shrinkage | 200 °C × 90 min | ＜2% | ＜2% |
Chemical Treatment & Structural Design
All PTFE blended needle felts are constructed with a PTFE scrim and processed with PTFE impregnation, providing the following benefits:
- Enhanced resistance to chemical attack
- Improved fiber structure stability under continuous high-temperature operation
- Reduced performance degradation and extended service life
Custom Blend Ratio Capability
The PTFE / P84 / PPS fiber ratios can be adjusted according to specific operating conditions, allowing the filter media to meet different requirements related to:
- Operating temperature
- Gas composition and corrosiveness
- Mechanical stress and cleaning conditions
- Cost optimization and service life balance
Application Selection Guide: PTFE + P84 vs PTFE + PPS
Proper material selection is critical for stable long-term filtration performance.
The following guidelines help determine the most suitable PTFE blended system.
When to Choose PTFE + P84 (PI)
Recommended for applications with:
- High continuous operating temperatures (typically approaching or exceeding 240 °C)
- High oxygen content or strong oxidative environments
- Severe acidic or chemically aggressive gas compositions
- Systems requiring maximum safety margin and extended service life
Engineering rationale:
P84 fibers maintain superior thermal and oxidation stability at elevated temperatures, making this blend ideal for extreme operating conditions.
When to Choose PTFE + PPS
Recommended for applications with:
- Medium to high operating temperatures (generally ≤200–220 °C)
- Corrosive gases with controlled oxygen levels
- Stable operating conditions with emphasis on cost-performance efficiency
Engineering rationale:
PPS fibers provide reliable mechanical stability and chemical resistance within controlled temperature and oxygen environments, offering an optimized balance between performance and cost.
Selection Notes
- For uncertain or fluctuating operating conditions, PTFE + P84 is recommended
- For well-defined, stable, and cost-sensitive applications, PTFE + PPS is preferred
- Special conditions can be addressed through custom fiber blend ratios
PTFE Blended Needle Felt for Industrial Filtration
PTFE blended needle felts are widely used in:
- High-temperature industrial baghouse systems
- Corrosive flue gas filtration
- Chemical processing and metallurgy
- Power generation and waste treatment facilities
- Continuous-operation dust collection systems
Supply Form
- Roll goods
- Custom cutting
- Suitable for filter bag and related filtration component manufacturing