With the development of science and technology, electronic products gradually enter thousands of households and play a very important role in people's life. With the continuous development of electronic products, the water repellent performance of electronic products is also continuously improved. People put forward higher standards and requirements for the protection of electronic components. In the electronic industry, the application of hydrophobic sound permeable membrane is more and more widely. Especially in electronic communication equipment such as mobile phone headphones, it is necessary to ensure that the sound can be clearly transmitted while protecting.

The waterproof and sound permeable membrane of telephone watch is a microporous membrane made by calendering, extrusion, biaxial stretching and other methods. The porosity can reach more than 85%, and the air can be smooth. The pore diameter of membrane is 0.2-3 μ m. It can effectively isolate water points, and the waterproof grade can reach above ipx7. Protect the electronic instrument from being unusable due to moisture or water.

The waterproof and sound permeable membrane of telephone watch developed and produced by UNM can well solve this problem. The pore diameter of the membrane is 0.1-1 μ M4, water droplet molecules can not pass through. At the same time, the porosity of the membrane is high, the air can flow smoothly, the pressure is balanced, the rigidity of the membrane is good, the density is moderate, and the sound insulation loss is small. The waterproof sound permeable membrane of telephone watch can also be widely used in digital camera, walkie talkie, smart watch, handheld ultrasonic instrument, handheld navigator, smart water cup, children's intelligent early education machine, speaker, earpiece, speaker, microphone, MIC, receiver, buzzer, etc. Interested parties can enter UNM store for consultation.