Our Colorless polyimide film (CPI film) is a high-performance transparent polymer material developed from traditional polyimide through specialized monomer design and synthesis. Compared to standard amber PI films, it maintains excellent high-temperature resistance, dimensional stability, and mechanical strength—while significantly improving optical transmittance to 85–90%. It also offers strong chemical resistance and processing flexibility, making it a preferred alternative to glass or colored PI in advanced applications such as flexible displays, optoelectronic components, medical devices, and aerospace systems. Available in a wide range of thicknesses (10μm to 125μm), customizable widths (up to 500mm), and in both roll and sheet formats, the film is easy to cut, laminate, and integrate. We offer expert technical support and tailored solutions to meet your specific application needs.
1. High light transmittance (85%+), suitable for optical-grade applications
2. Outstanding thermal stability with operating temperatures over 300°C
3. Excellent flexibility for foldable and rollable devices
4. Superior mechanical strength and surface hardness
5. Excellent chemical resistance to acids, bases, and solvents
6. Moisture and radiation resistance for harsh environments
7. Easy to handle, cut, and process for various assemblies and laminations
| Property | Colorless polyimide film | |
| Thickness | 10μm to 125μm | |
| Width | up to 500mm | |
| Transmittance | 450nm | 84.1% |
| 500nm | 86.5% | |
| 550nm | 87.10% | |
| 300-900nm | 87.10% | |
| Yellow Index | 3.5-4.0 | |
| GlassTransition Temperature | 257℃ | |
* Flexible Displays: AMOLED cover windows, foldable and rollable screens, touch panels
* Optoelectronics: Optical sensors, transparent FPCBs, flexible solar cells
* Smartphones: Lightweight and shatter-resistant alternative to glass covers
* Photovoltaics: Protective cover film replacing glass to reduce weight and risk of breakage
* Medical Devices: Transparent drug delivery tubing or optical components in clean environments
* Aerospace: Lightweight, high-temperature insulation and structural materials
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