High-Precision TPU Film for Premium Audio Speaker & Earphone Diaphragms
Product Overview
- Our TPU Speaker Diaphragm Film is a specialized ultra-thin TPU film engineered for acoustic applications, particularly as diaphragm material for speakers, earphones, headphones, and microphones. The film's unique combination of low density, high internal damping, and excellent elasticity produces natural, warm sound reproduction with rich bass response and clear high frequencies.
- Available in thicknesses from 0.012mm to 0.080mm, our diaphragm film offers audio engineers the flexibility to tune frequency response characteristics by selecting the appropriate thickness, hardness, and material grade. Both polyester-based and polyether-based grades are available.
Key Features
-
Superior Acoustic Performance
Low density and optimized internal damping deliver natural, detailed sound with minimal harmonic distortion.
-
Rich Bass Response
TPU's high elasticity and low stiffness enable extended low-frequency response.
-
Ultra-Thin Capability
Available down to 0.012mm thickness for ultra-compact drivers.
-
Wide Frequency Range
Consistent performance from 20Hz to 20kHz+ across the audible spectrum.
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Excellent Durability
High tensile strength (≥40 MPa) and tear resistance for long-term reliability.
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Temperature Stability
Consistent acoustic properties from -40°C to +85°C.
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Moisture & Humidity Resistance
Polyether grade offers excellent hydrolysis resistance.
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Custom Tuning
Thickness, hardness, and material grade can be precisely customized.
Technical Specifications
|
Parameter |
Specification |
|
Material |
High-Purity Polyester/Polyether TPU Film |
|
Thickness |
0.012mm - 0.080mm |
|
Density |
1.10 - 1.25 g/cm³ |
|
Tensile Strength |
≥40 MPa |
|
Elongation at Break |
≥450% |
|
Glass Transition Temp (Tg) |
-40°C to -20°C (polyether) / -10°C to 0°C (polyester) |
|
Sound Velocity |
400 - 600 m/s (depending on hardness) |
|
Loss Tangent (tan d) |
0.05 - 0.15 (at 1kHz) |
|
Transparency |
≥90% |
|
Hardness (Shore A) |
75A - 95A (customizable) |
|
Surface Finish |
Matte / Glossy / Textured |
|
Temperature Range |
-40°C to +85°C |
Material Grades
Polyether TPU (Recommended for most audio applications)
- Lower glass transition temperature (-40°C to -20°C)
- Superior low-temperature flexibility and consistency
- Excellent hydrolysis resistance
- Warmer, more natural sound signature
- Ideal for: earphone diaphragms, premium headphones, high-fidelity speakers
Polyester TPU
Higher glass transition temperature (-10°C to 0°C)
Better high-temperature resistance and mechanical strength
Brighter, more detailed sound signature
Ideal for: micro speakers, automotive speakers, high-power drivers
Applications
-
Earphones & Headphones
In-ear monitor diaphragms, headphone drivers, noise-cancelling earbuds
-
Portable Speakers
Bluetooth speakers, waterproof speakers, mini audio devices
-
Mobile Devices
Smartphone, tablet, and smart watch speakers
-
Automotive Audio
Car door speakers, dashboard tweeters, center channel speakers
-
Professional Audio
Studio monitors, microphone diaphragms, acoustic transducers
-
Consumer Electronics
Smart home speakers, voice assistant devices, gaming headsets
-
Wearable Audio
Bone conduction devices, hearing aid components, smart glasses audio
FAQ
Q1: What thickness is recommended for earphone diaphragms?
A1: For in-ear earphones, the most commonly used thickness is 0.015mm - 0.030mm. Thinner films (0.012-0.015mm) are used for balanced armature-style drivers, while slightly thicker films (0.025-0.050mm) suit dynamic driver designs.
Q2: Can you provide samples for acoustic evaluation?
A2: Yes, we provide free film samples in various thicknesses and grades for acoustic testing.
Q3: How does TPU compare to other diaphragm materials like Mylar or beryllium?
A3: TPU offers superior internal damping compared to Mylar (PET), resulting in lower distortion and a more natural sound. TPU is also significantly more cost-effective than metal diaphragms.
Q4: What is the minimum order quantity for custom thickness?
A4: Standard thicknesses have an MOQ of 500m². Custom thicknesses require an MOQ of 1,000m².
Why Choose Us
100% Virgin Material
All products are manufactured from premium-grade raw TPU material with zero recycled content, ensuring consistent quality, soft texture, and uniform performance.
R&D Investment
We invest 10% of annual revenue in research and development, continuously innovating to meet evolving market demands and customer requirements.
Advanced Laboratory
Our in-house testing laboratory is equipped with state-of-the-art instruments for precise sample analysis, enabling collaborative project development with clients.
Modern Manufacturing
Full-process modern production equipment with advanced manufacturing technology. All products are backed by proprietary intellectual property and strict production control.
Talent & Innovation
We continuously recruit top engineering talent and strengthen scientific research investment to drive product innovation and process improvement.
Global Reach
Our subsidiary, Shanghai Xin Gen Tech Co.,Ltd., specializes in international trade, promoting and selling our parent company's TPU products to customers worldwide.
Certifications & Compliance
- ISO 9001:2015 Quality Management System
- RoHS compliant
- REACH registered
- FDA approved (select product lines)
- OEKO-TEX Standard 100 (applicable products)