Acoustic Waterproof Membrane \| TPU Sound-Permeable \| Mimoyin
Acoustic Waterproof Membrane
Mimoyin Technology Co., Ltd. manufactures high-performance TPU acoustic waterproof membranes designed for TWS earbuds, wearable audio devices, and smart electronics. Our membranes achieve ≤1dB acoustic loss while maintaining IP67 waterproof protection.
How TPU Acoustic Waterproof Membrane Works
TPU (Thermoplastic Polyurethane) acoustic membranes use a dense, semi-porous structure that allows sound waves to pass through with minimal attenuation (≤1dB loss) while blocking liquid water. The material's inherent flexibility and hydrophobicity make it ideal for TWS earbuds, smartwatches, and Bluetooth headsets.
Technical Specifications
| Parameter | Typical Value | Custom Range |
|---|---|---|
| Base Material | TPU (Thermoplastic Polyurethane) | Customizable |
| Waterproof Rating | IP67 | IP68 available |
| Acoustic Loss | ≤1dB @ 1kHz | ≤0.5dB (premium grade) |
| Air Permeability | 1500–3000 ml/min @ 7kPa | Customizable |
| Operating Temperature | -30°C to +80°C | -40°C to +100°C |
| Membrane Thickness | 0.05–0.3 mm | Customizable |
| Adhesive Options | Acrylic PSA | Silicone / Hot-melt |
| MOQ | 1000 pcs (samples 500 pcs) | Negotiable |
All specifications can be customized. Sample lead time: 3–5 days. Mass production: 7–15 days.
Applications
- TWS Earbuds — Acoustic vent membrane with ≤1dB loss, IP67 protection. Explore TPU sound-permeable options →
- Smartwatches & Wearables — Flexible, skin-friendly, waterproof sealing for health sensors.
- Bluetooth Headsets — Microphone and speaker vent membranes with balanced acoustic transparency.
- Smart Glasses & AR Devices — Ultra-thin TPU membranes for compact acoustic venting.
- Electric Toothbrushes — Waterproof sealing with acoustic vent for vibration feedback.
Why Choose Mimoyin TPU Membrane
- ≤1dB Acoustic Loss — Industry-leading sound transparency for premium audio experience.
- Ultra-Thin & Flexible — 0.05mm available, perfect for compact TWS designs.
- IP67/IP68 Certified — Reliable waterproofing without compromising sound quality.
- Custom Die-Cutting — Precision shapes and sizes based on your drawings.
- Stable Mass Production — Consistent quality from prototype to volume orders.
Frequently Asked Questions
What is the acoustic loss of your TPU membrane?
Standard grade achieves ≤1dB @ 1kHz. Premium grade achieves ≤0.5dB for high-end audio applications.
Can TPU membrane be used for IP68?
Yes, with reinforced backing and optimized thickness, IP68 is achievable for TPU membranes.
Is TPU membrane compatible with automated assembly?
Yes, our TPU membranes come with adhesive backing (PSA) compatible with pick-and-place and ultrasonic welding processes.
How does TPU compare to ePTFE for acoustic applications?
TPU offers better flexibility and acoustic transparency (lower dB loss), while ePTFE provides higher chemical resistance and temperature range. Read our detailed comparison →
What is the minimum thickness available?
Ultra-thin TPU membranes down to 0.05mm are available for compact device designs.
How long does it take to get samples?
Sample lead time is 3–5 working days after drawing confirmation. Request free samples →
Need Acoustic Waterproof Membrane for Your Product?
Contact our engineering team for technical consultation, free samples, and custom die-cutting solutions.
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.