ePTFE Membrane
Micro-one is a filter bag manufacturer and supplier that makes everything in-house: nonwoven felt, ePTFE membrane, lamination and finished filter bags. This vertical integration lets us design filters for each industry's flue gas conditions and control quality and lead times directly.
Our flagship products are the CataFill™ catalytic filter bag, which reduces dust and harmful gases such as NOx and HCN in a single filter, and the DuraFill™ ePTFE membrane filter bag. Micro-one is one of the few catalytic filter bag suppliers with bags installed and operating at customer plants (3,300 bags at the Kanding incinerator, Taiwan, 2024; 840 bags at a refinery/chemical plant of a major Korean company, 2026). Since 2006, Micro-one has supplied filter bags to more than 700 customers in Korea and overseas.
An ePTFE membrane is a microporous film made by stretching PTFE in two directions; laminated onto filter media, it captures dust on the filter surface. Micro-one is an ePTFE membrane manufacturer and supplier in Korea.
Laminated onto standard felt, it turns a conventional filter bag into a membrane filter bag. Micro-one also supplies membranes for HEPA and ULPA filters used in the semiconductor, display and pharmaceutical industries. Both DuraFill™ filter bags and CataFill™ catalytic filter bags are built on this membrane.
Withstands temperatures above 250°C
Resistant to acids, alkalis and other chemicals
Pore size 1 µm or smaller, porosity above 80%
Uniform pore structure keeps air permeability consistent across the membrane and spreads gas evenly
When laminated onto filter media, captures more than 99.9% of dust at the surface
PTFE powder is compressed into an initial shape.
PTFE powder is mixed with lubricant into a paste and extruded.
The film is stretched in the machine direction (MD).
Stretching in the cross direction (CD) completes the pore structure.
| Feature | Standard needle-felt bag | ePTFE membrane filter bag |
|---|---|---|
| Filtration | Depth filtration (dust builds up inside the felt) | Surface filtration (dust captured on the membrane) |
| Cleaning | Dust embeds in the felt and is hard to release | Dust cake releases easily |
| Pressure drop | Rises over time | Low and stable |
| Fine dust capture | Relatively low | Above 99.9% |
It is a microporous film made by stretching PTFE in the machine direction (MD) and the cross direction (CD). Laminated onto the surface of filter media, it stops dust from entering the filter and captures it at the surface.
Yes. Micro-one produces it in-house, from preforming and paste extrusion to MD and CD stretching, and uses it in DuraFill™ filter bags and CataFill™ catalytic filter bags.
A standard filter bag works by depth filtration, so dust penetrates and accumulates inside the felt. A membrane filter bag uses surface filtration, so it cleans easily and its pressure drop rises less, improving bag life and collection efficiency.
Yes. Micro-one supplies membranes and laminated media to baghouse filter manufacturers and to HEPA/ULPA air filter manufacturers. Please contact us.
Tell us your application – gas temperature, dust type, baghouse size and bag dimensions – and we will recommend the right membrane or filter bag. info@micro-one.kr · +82-41-587-6911
Importing into the United States? Felt filter bags sewn in Korea enter as Korean-origin goods at a 12.5% combined duty, vs. about 41.3% for China-made bags. Compare US import duty →
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