Commonly known as Teflon® filter bags, these are crafted from PTFE, short for polytetrafluoroethylene. PTFE is a high-performance synthetic polymer with unique properties. Besides being hydrophobic, meaning it repels water, PTFE is renowned for its chemical resistance, non-stickiness, high-temperature tolerance, and low friction coefficient. These characteristics make PTFE filter bags ideal for a wide range of filtration applications. As a filter media, it boasts the following features:
- High Filtration Efficiency - The microscopic pores in the PTFE material provide a vast surface area for effective particle capture, even for particles as small as submicron size. This enables the bags to achieve exceptionally high filtration efficiencies, often exceeding 99% or more, which is vital in applications where strict air quality regulations are enforced.
- Chemically Inert - PTFE materials exhibit high resistance to many corrosive chemicals, making them suitable for filtration applications involving aggressive gases. This chemical resistance ensures extended bag life and minimizes the risk of bag failure or degradation.
- Excellent Thermal Stability - PTFE materials can endure extreme temperatures without compromising filtration performance. The continuous operating temperature of Teflon filter bags is 240°C (464°F), making them well-suited for use in high-temperature applications such as industrial furnaces or incinerators.
- Low Friction Coefficient - PTFE filter bags also possess excellent dust cake release properties. The low surface energy of PTFE prevents dust particles from adhering to the bag's surface, facilitating easier cleaning and reducing the frequency of bag replacements. This feature helps maintain consistent filtration performance and decreases maintenance costs.
- Excellent Hydrolysis Resistance - PTFE is celebrated for its water-repelling characteristics, making it an ideal material for applications where moisture is a concern.
- Excellent Oxidation Resistance - PTFE is highly resistant to oxidation, ensuring the longevity and durability of the filter bags in high moist heat environments.
In addition to these filtration characteristics, PTFE filter bags also offer several other advantages, including:
- Long Service Life - PTFE filter bags provide a long service life, even under challenging operating conditions. This can result in significant cost savings over time.
- Easy to Clean and Maintain - PTFE filter bags are straightforward to clean and maintain, which helps to reduce downtime and boost productivity.
- Lower Energy Consumption - Due to the enhanced cleaning efficiency of Teflon filter bags, they help to reduce the overall pressure drop across the filter media, enhancing the efficiency and lowering the energy consumption of the dust collection system.
| Characteristics |
Rating |
| Fiber Content |
100% Virgin PTFE |
| Weight |
750g/m² (22.12oz/yd²) |
| Thickness |
1.0mm (0.039in) |
| Fabric Construction |
Needlefelt |
| Continuous Operating Temperature |
240°C (464°F) |
| Maximum Surge Temperature |
260°C (500°F) |
| Abrasion Resistance |
Excellent |
| Acid Resistance |
Excellent |
| Alkali Resistance |
Excellent |
| Moist Heat Resistant |
Excellent |
| Energy Absorbsion |
Good |
| Filtration Property |
Fair |
| Oxygen (15%+) |
Excellent |
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