Shenzhen Xindingchen Electronic Technology Co., Ltd.

Waterproof vent membranes are built on an expanded polytetrafluoroethylene (ePTFE) microporous film. The pores are far smaller than water droplets but far larger than gas molecules, so air passes freely while water and dust are kept out, effectively balancing the pressure difference and preventing condensation and seal failure.

Typical applications: housings of mobile phones and wearable devices, earphones, walkie-talkies, sensors, automotive electronics, outdoor lighting, and other parts that need venting while remaining waterproof.