Waterproof Breathable Membrane Principle
Waterproof Breathable Membrane Principle
Waterproof breathable membranes use micro-porous structures that block liquid water while allowing gas molecules to pass through.
Breathability & Water-Pressure Capability
| Tier | Breathability (ml/min @ Ø10 mm, 7 kPa) | Water pressure | Typical application |
|---|---|---|---|
| Low breathability (high waterproof) | 200–1,000 | 50–30 m | Deep-water / harsh waterproof; custom per spec |
| Mid (balanced) | 1,000–5,000 | 30–2 m | Automotive / general outdoor; custom per spec |
| High breathability | 5,000–12,000 | 10–1 m | High heat dissipation / low waterproof need; custom per spec |
Mimoyin does not sell fixed catalog SKUs. For each project we match the membrane material to your drawing and required breathability, acoustic loss, and water pressure, then produce samples for your validation testing.
Working Principle
The pore size is smaller than water droplets but larger than air molecules.
Material Types
- ePTFE Membrane
- TPU Film
- PU Coating
Applications
- Electronics Protection
- Automotive Systems
- Outdoor Devices
