ePTFE Waterproof Breathable Vent Membrane

Acoustic Vent Membrane

Oval ePTFE waterproof sound permeable membrane for TWS earphones
Waterproof Acoustic Vent Membrane © Mimoyin Technology

Acoustic Vent Membrane (Waterproof Sound Permeable Membrane)

Mimoyin waterproof sound-permeable membrane is manufactured from ultra-thin expanded PTFE material, specially customized for audio electronic devices that require both waterproof protection and undistorted sound transmission.
Its uniform microporous structure effectively blocks sweat, rain, dust and water splashes, reaching IP67 & IP68 waterproof grade. Meanwhile, the acoustic insertion loss is controlled within 1dB across full frequency band, which retains original clear sound without muffling for speakers and microphones.

Core Advantages

  1. Ultra-low sound loss ≤1dB, restore high-fidelity audio output
  2. Excellent sweat & waterproof performance, fit sports wearables
  3. Super thin lightweight design, adapt to mini earphone cavities
  4. Stable batch acoustic performance, consistent micropore distribution
  5. Custom oval, round die-cut shapes with adhesive backing

Main Applications

TWS Bluetooth earbuds, smart watches, hearing aids, car microphones, portable walkie-talkies

Technical Parameters

ParameterSpec
MaterialUltra-thin ePTFE
Waterproof GradeIP67 / IP68
Acoustic Loss≤ 1dB
Operating Temp-40℃ ~ +120℃
Thickness0.08–0.25mm

Order Info

MOQ:1000pcs | Sample lead time:3–5 days | Mass production:7–15 days

Frequently Asked Questions

What waterproof rating do your membranes achieve?

Our ePTFE waterproof breathable membranes achieve IP67 and IP68 protection grades. They withstand immersion at 1 meter depth for 30 minutes (IP67) and continuous submersion (IP68), while maintaining stable airflow for pressure equalization.

Can you provide custom sizes and die-cutting shapes?

Yes, we offer full custom die-cutting services. We can produce membranes in any size or shape according to your specifications, including round, rectangular, and complex custom geometries. Our Class 10,000 cleanroom ensures precision cutting for production volumes.

What is the minimum order quantity (MOQ)?

We support both prototyping and mass production. Free samples are available for testing with 3-5 working days delivery. For mass production, MOQ is flexible depending on the product specification and can be discussed based on your project requirements.

What industries and applications do your membranes serve?

Our membranes are widely used in automotive electronics, lithium batteries, smart wearables, consumer electronics, LED lighting, medical devices, and industrial sensors. Applications include speaker acoustic vents, pressure balance vents, microphone waterproof membranes, and battery venting solutions.

How long is the delivery time for samples and mass production?

Free samples are delivered within 3-5 working days via express shipping. Mass production typically takes 7-15 working days depending on order quantity and customization requirements. We provide one-stop technical support from sample testing to mass production.