en 
Wechat QRcode
Hotline:0755-22277778
Tel：0755-22277778
Mobile：13826586185（Mr.Duan）
Fax：0755-22277776
E-mail：duanlian@xianjinyuan.cn
PI aluminum plated film · Aerospace grade thermal control and optical materials
In the space environment, spacecraft face extreme thermal challenges - temperatures on the sunny side can exceed 200 ° C, while temperatures on the shaded side can drop below -200 ° C. How to maintain the working temperature of internal equipment without consuming energy? The answer is multi-layer insulation components (MLI).
MLI is composed of dozens of alternating layers of aluminum plated films and spacer layers, with each layer of aluminum plated film serving as an efficient radiation reflection barrier. The core layer material of MLI is PI aluminum plated film. Aromatic PI film has become an indispensable film material for the outermost layer of MLI due to its high heat resistance and stability to cosmic radiation for about 10 years.
��️ Core materials:PI aluminum plated film, with the extreme weather resistance of PI substrate and the high reflectivity of aluminum coating, has become an irreplaceable core layer material for spacecraft MLI.
PI aluminum coated film is a composite material in which a high-purity aluminum layer is uniformly deposited on the surface of a high-performance PI film through vacuum evaporation technology. It combines the excellent performance of PI film - high temperature resistance, chemical corrosion resistance, excellent mechanical strength and electrical insulation - with the good conductivity, reflectivity and barrier properties of aluminum coating.
Long term -269 ° C~260 ° C, short-term>400 ° C, thermal decomposition>500 ° C; dielectric constant~3.4, insulation resistance 1000 trillion Ω· cm; wear-resistant and tear resistant.
The conductivity is second only to copper/silver, the thermal conductivity is three times that of iron, and the surface reflectivity can reach 97%; Barrier gas/moisture, endowing with conductivity, reflection, and shading functions.
The aluminum layer preparation of PI aluminum plated film mainly adopts vacuum evaporation process. In a high vacuum environment, high-purity aluminum wire or block is evaporated into a gaseous state by heating, and then deposited on the surface of PI film to form a coating.
Ensure the free path and deposition uniformity of aluminum vapor molecules, typically with a vacuum degree<10 ⁻⁵ pa="">
Plasma treatment, ultraviolet irradiation, or chemical etching can improve surface activity and enhance adhesion.
Aluminum evaporation temperature~1200-1400 ° C, precise control of rate to ensure uniform and dense coating.
Cooling, curing, and testing to ensure product stability.
Single/double-sided aluminum plating:Provide insulation on one side and conductive reflection on the other side; The double-sided reflectivity can reach over 98%, suitable for high-end optics and special shielding needs.
-269 ° C~260 ° C long-term,>400 ° C short-term, suitable for extreme working conditions from space to engine compartment.
UV visible near-infrared ≥ 92%, aluminum surface can reach 97%, double-sided ≥ 98%.
The resistivity is as low as 10 ⁻⁶Ω· cm, and the surface resistance is 10 ⁵~10 ⁷ Ω/seq.
The aluminum layer blocks gas/moisture, and there is no significant change in internal moisture at a humidity of 90%/72h.
Tensile strength>170MPa, strength retention rate of 90% after 5 × 10 ⁹ rad fast electron irradiation.
Extremely high radiation resistance, minimal air release under vacuum, suitable for space applications.
| performance metrics | typical value | Reference Standard |
|---|---|---|
| Long term use temperature | -269 ° C to 260 ° C | ASTM D374 |
| Short term temperature tolerance | Above 400 ° C | — |
| visible light reflectance | ≥ 92% (single-sided); ≥ 98% (double-sided) | — |
| Thermal decomposition temperature | >500°C | — |
| Dielectric constant (1MHz) | ~3.4 | — |
| insulation resistance | 1000 trillion Ω· cm | — |
MLI core reflective layer, aluminum layer reflects radiant heat, PI is resistant to extreme environments. DuPont Kapton ® HN aluminum plated film is the MLI outer layer standard. MLI blanket prevents both excessive heat dissipation and overheating of components.
FPC local shielding, grounding layer, EMI protection; Flexible substrate for high-power chip heat dissipation and equalization plate; High resistance and gentle heating film (for pipeline antifreeze and environmental insulation). Yanbo brand PI aluminum plated film has been selected by multiple mobile phone manufacturers as a key component for foldable screens.
High precision flexible reflector, lightweight focusing system, scanning mirror, laser cavity reflector; High end projection reflector and brightening film substrate. Aluminum reflectivity>92%, PI provides a smooth surface, suitable for lasers, optical sensors, etc.
| characteristic | PI aluminum plated film | PET aluminum plated film |
|---|---|---|
| Long term use temperature | -269 ° C to 260 ° C | -70 ° C to 120 ° C |
| Short term temperature tolerance | Above 400 ° C | 150°C |
| mechanical strength | Excellent (tensile strength>170MPa) | good |
| Radiation resistance | Excellent (5 × 10 ⁹ rad retention rate of 90%) | general |
| cost | higher | lower |
| Typical Applications | Aerospace MLI, flexible heating film, high-frequency FPC | Ordinary packaging, labeling, and building insulation |
Conclusion:The core advantage of PI aluminum plated film lies in its tolerance to extreme environments, making it the only choice for spacecraft MLI, flexible heating films, and other applications that must withstand extreme temperatures or radiation.
5 μ m~300 μ m can be customized, 5 μ m is suitable for foldable screens and aerospace weight reduction, and 25/50/75/125 μ m is used for high mechanical strength scenarios.
Single side is used for insulation on one side and conductive reflection on the other; Double sided reflectivity>98%, used for double-sided reflection or conductivity.
20–100nm， The thicker the thickness, the stronger the reflectivity and barrier properties, but the flexibility decreases and can be customized.
Clear temperature, irradiation, and chemical environment, PI aluminum coating covers -269 ° C~400 ° C, suitable for the vast majority of extreme environments.
Width can reach 1550mm, length 100-1500m/roll, suitable for mass production of large-area MLI and optical reflective films.
The essence of PI aluminum coated film is an engineering material that combines the extreme environmental resistance of PI film with the optical reflection and conductivity functions of aluminum coating. It is not simply "PI aluminum" - it achieves a strong bond between PI substrate and aluminum coating at the atomic scale through precision vacuum evaporation technology. PI provides a "skeleton" - structural support that is resistant to high and low temperatures, radiation, high insulation, and high strength; Aluminum provides "functionality" - high reflectivity, conductivity, and barrier performance output. The synergy between the two makes PI aluminum coated film an irreplaceable material option in high-end applications such as spacecraft thermal control MLI, flexible electromagnetic shielding, and precision optical reflection.
Understanding the engineering logic behind the combination of PI and aluminum - why PI instead of PET, why aluminum instead of silver or gold, and the choice between single-sided aluminum plating and double-sided aluminum plating - is the key to upgrading PI aluminum plating film from a "roll of aluminum plating film" to an "engineering decision".
www.xianjinyuan.cn/products.html
© 2026 Xianjin Yuan · PI Aluminized Film Technical Reference
Advanced Institute (Shenzhen) Technology Co., Ltd， © two thousand and twenty-onewww.xianjinyuan.cn. All Rights Reserved.Guangdong ICP No. 2021051947 sitemap
Español
Français
Português