Commonly known as Teflon® filter bags, which are made from PTFE, short for polytetrafluoroethylene. PTFE is a high-performance synthetic polymer with unique properties. In addition to being hydrophobic, which means it repels water, PTFE is known for its chemical resistance, non-stickiness, high-temperature tolerance, and low friction coefficient. These properties make PTFE filter bags ideal for a wide range of filtration applications. As a filter media, it has the following characteristics:
- High Filtration Efficiency - The microscopic pores in the PTFE material provide a large surface area for effective particle capture, even for particles as small as submicron size. This enables the bags to achieve high filtration efficiencies, often exceeding 99% or more, which is crucial in applications where strict air quality regulations are in place.
- Chemically Inert - PTFE materials have a high resistance to many corrosive chemicals, making them suitable for filtration applications involving aggressive gases. This chemical resistance ensures longer bag life and reduces the risk of bag failure or degradation.
- Excellent Thermal Stability - PTFE materials can withstand extreme temperatures without sacrificing filtration performance. The continuous operating temperature of Teflon filter bags is 240°C (464°F), which makes them well-suited for use in applications involving high-temperature gases, such as those found in industrial furnaces or incinerators.
- Low Friction Coefficient - PTFE filter bags also offer excellent dust cake release properties. The low surface energy of PTFE prevents dust particles from sticking to the bag's surface, facilitating easier cleaning and reducing the frequency of bag replacements. This characteristic helps maintain consistent filtration performance and reduces maintenance costs.
- Excellent Hydrolysis Resistance - PTFE is known 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, which ensures the longevity and durability of the filter bags in high moist heat environments.
In addition to these filtration characteristics, PTFE filter bags also offer a number of other advantages, such as:
- Long Service Life - PTFE filter bags have a long service life, even in challenging operating conditions. This can lead to significant cost savings over time.
- Easy to Clean and Maintain - PTFE filter bags are easy to clean and maintain, which helps to reduce downtime and improve productivity.
- Lower Energy Consumption - Because of Teflon filter bags' enhanced cleaning efficiency, it helps to reduce the overall pressure drop across the filter media, improving the efficiency and 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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