Heat Resistant ESD Punchable High Reflectivity Aluminized Polyimide Film MLI Insulation for Aerospace Airplane Window EMI

Aluminized polyimide film is a composite functional material with a uniform aluminum layer deposited on a high-performance polyimide (PI) film via vacuum evaporation or magnetron sputtering. It combines the core properties of the polyimide substrate (heat resistance of 260°C+, H-class insulation, and aging resistance) with the aluminum layer’s (high barrier, EMI shielding, and high reflectivity). Available in thicknesses ranging from 25 to 125 μm, it is flexibly adaptable to applications in electronics (FPC shielding, lithium battery tab insulation, chip packaging shielding), new energy (photovoltaic backsheets, motor insulation), aerospace (component thermal insulation, antenna reflection), and specialty packaging (medical sterilization packaging, military moisture-proof packaging). It is a high-end, critical material that replaces traditional materials and addresses protection needs in extreme environments.

Features of  Aluminized Polyimide Film：

High Light Transmittance and Optical Performance

High Visible Light Transmittance: VMPI curtain film has excellent visible light transmittance, meeting traffic safety standards for windshield and side window transmittance, ensuring a clear field of view for the driver. It is particularly suitable for use in environments requiring high visual accuracy, such as tanks and aircraft.

Low Reflection and Glare Filtering

Nano-level optical technology is used to reduce glass reflectivity (optimizing external reflectivity), preventing glare interference and improving operational safety in complex lighting conditions.

Intelligent Dimming Technology: Some high-end models support adaptive light control, dynamically adjusting light transmittance through rare earth materials or nano-ceramic layers to ensure all-weather visibility, similar to aviation smart window technology.

Insulation and Protection: Based on the principle of plasma light curtain insulation, rare earth oxide materials absorb infrared and ultraviolet rays, achieving a comprehensive insulation rate of over 60%, significantly reducing temperature fluctuations within the vehicle/cabin.

UV and Explosion-Proof: High UV rejection protects the skin of drivers and passengers, as well as the interior. Extreme Environment Adaptability: For applications such as tanks and aircraft, the film thickness has been upgraded to over 4 microns, enhancing impact resistance to withstand high-speed rockfall and extreme weather conditions.

 Compatibility and Functional Expansion

Signal Interference-Free: The inorganic nano-ceramic material eliminates the electromagnetic shielding effect of metal coatings and is compatible with 5G communications and satellite navigation systems, meeting the demands of modern vehicle electronics.

One-Way Privacy Protection: Blocking visibility outside the vehicle without sacrificing light transmittance meets the concealment requirements of military vehicles while maintaining internal visibility.

Applications of  Aluminum Coated Polyimide Film: 

Aluminized polyimide film (aluminized PI film) boasts high-temperature resistance (260°C+), high insulation, and high barrier properties, making it suitable for high-end applications such as electronics, new energy, and aerospace.

1. Electronics Manufacturing

Flexible Printed Circuit (FPC)

Used as a shielding layer/cover film (for mobile phone foldable screens and wearable device cables). The aluminum layer provides EMI shielding (≥30dB). The substrate is resistant to 260°C reflow soldering. A thickness of 25-50μm makes it suitable for thin and lightweight designs.

Lithium Battery Protection

Electronic tab insulation sheet and battery cell packaging provide resistance to electrolyte corrosion. The aluminum layer blocks oxygen and water, extending battery cycle life by 10%-15% (suitable for new energy vehicles and energy storage batteries). Chip Packaging
High-temperature masking film (baked at 200-300°C), volatile-free (VOC <1ppm), leaves no adhesive residue when removed, and meets semiconductor cleanliness requirements.

II. New Energy Sector

Photovoltaic Modules
Backsheet composite layer (replaces PET aluminized film), UV aging resistance for 10 years+, weatherability from -60°C to 200°C, reducing photovoltaic maintenance costs.

Industrial Insulation
Motor/Transformer Insulation Pad (Class H insulation), breakdown voltage ≥15kV/mm, 30%-50% thinner than mica sheet, suitable for high-temperature applications in steel and chemical industries.

III. Aerospace and Specialty Industries

Aerospace Components
Engine thermal insulation film, satellite antenna reflective film, lightweight (1.4-1.6g/cm³), resistant to transient high temperatures of 400°C, with an aluminum layer reflectivity ≥90%. Specialty Packaging
Medical supplies/military packaging, sterilizable at 121°C. The aluminum layer blocks oxygen and microorganisms, allowing for 2-3 years of storage at room temperature without secondary contamination.

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