Analysis of Glass Fiber, PP, Composite PP, ePTFE
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Synthetic fiber filter media |
Glass fiber filter media |
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Filter material |
PP, PET, Nylon, PP-PET, PTFE, PVDF |
Mico fiberglass |
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Mode of action |
After electrostatic charging treatment, particles can be intercepted through physical interception and adsorption |
Without electrostatic treatment, the fiber structure is very tight, and extremely small fiber voids block the particles |
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Application scope |
The main material of the filter screen for H13 grade and below filters is mainly used in household air purifiers |
It features high filtration efficiency and can be applied in industrial clean rooms, chip workshops, operating rooms, high-end purifiers, high-end fresh air systems, etc. |
Glass Fiber Filter (Glass Fiber Filter Media Pack)
Glass Fiber Filter Media Features:
The material is microglass fiber media, with a fiber diameter of about 0.3 μm, a dense structure, and relies on physical interception and filtration of particles.
Pros:
- It has a large dust holding capacity (long service life), a single filtration efficiency (up to 99.9995%), and a filtration accuracy of 0.1μm.
- It does not rely on electrostatic adsorption, and there is no risk of filtration failure.
Cons:
- The wind resistance is large (about 200Pa), and it needs to be equipped with a high-power motor, which makes the noise high.
- The material is brittle, fragile, not washable, and needs to be fixed with a metal/aluminum frame, which is expensive.
Usage Scenarios:
- Industrial clean rooms, chip workshops, operating rooms, high-end fresh air systems and other places with extremely high requirements for cleanliness.
- It is not suitable for ordinary household purifiers (due to high wind resistance and high noise).
PP Filter Media (Polypropylene)
Features:
The material is polypropylene meltblown fiber, the fiber diameter is about 4 μm, usually treated by electrostatic electret (physical interception + electrostatic adsorption).
Pros:
- Acid and alkali resistance, corrosion resistance, stable performance, non-toxic and tasteless.
- The wind resistance is low (about 100Pa) and the cost is low.
Cons:
- Low dust holding capacity and fast failure rate (static electricity is easy to attenuate).
- The filtration efficiency is limited (up to H14 class, but the actual household use is mostly H10-H12 class).
Usage Scenarios:
- Pre-filtration of household air purifiers, water treatment (e.g. removal of large particles).
- Applicable scenarios: pre-filtration of pharmaceutical injections, food and beverage, pure water pretreatment in the electronics industry, etc.
Composite PP Filter Media (PET+PP)
Features:
Pros:
- The wind resistance is extremely low (only 50Pa for H13 class and about 20Pa for H12 class), which is suitable for small wind turbine equipment.
- The filtration efficiency can reach H13 level (99.95%).
Cons:
- Relying on electrostatic adsorption, the efficiency will be attenuated in the long term.
- A large fan is required to maintain the air volume, and the bdust holding capacity is medium.
Usage Scenarios:
- The mainstream choice of HEPA filters for home air purifiers (balancing efficiency, wind resistance, and cost).
- Household appliances that are sensitive to wind resistance, such as vacuum cleaners.
ePTFE Cartridge (Expanded PTFE Cartridge)
Features:
Pros:
- High chemical stability: high temperature resistance (260°C), corrosion resistance, hydrophobicity.
- Low wind resistance and high efficiency: The wind resistance is lower than that of glass fiber at the same efficiency, and the MPPS (most penetrating particle size) is smaller.
- High mechanical strength: the tensile strength is 8 times that of glass fiber
Cons:
- The price is expensive, and the production technology is monopolized.
- It is not suitable for abrasive dust environments (the membrane is easily damaged).
Usage Scenarios:
- High-end industrial filtration (chemical, pharmaceutical clean room, microelectronics clean room).
