PI film aluminum plating

PI (polyimide) film aluminum plating 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. This product combines the excellent performance of PI film, such as high temperature resistance, chemical corrosion resistance, and excellent mechanical propertiesThe strength and electrical insulation, as well as the good conductivity, reflectivity, and barrier properties of aluminum coatings, provide high-performance solutions for multiple industries.

Characteristics of polyimide aluminum plated film products

1. Excellent high temperature resistance: PI film can maintain its physical and chemical stability at extremely high temperatures, and this characteristic is still retained after aluminum plating, making it suitable for applications in high temperature environments.

2. Excellent chemical corrosion resistance: PI film has good resistance to most organic solvents, acids, alkalis, etc. The aluminum plating layer further enhances its corrosion resistance and extends the product's service life.

3. High reflectivity: The aluminum coating has high reflectivity and can effectively reflect light or electromagnetic waves. It is widely used in applications that require high reflectivity, such as optical mirrors, electromagnetic shielding materials, etc.

4. Good barrier properties: The aluminum plating layer has a good barrier effect on gases, moisture, etc., and is suitable for packaging materials, electronic component packaging, and other fields that require high barrier properties.

5. Excellent mechanical properties: PI film itself has excellent mechanical strength, wear resistance, and tear resistance, which are maintained even after aluminum plating, ensuring stable performance of the product during use.

Production process of flexible aluminum plated film

1. PI film preparation: Select a PI film that meets the requirements as the substrate, ensuring that its thickness, width, flatness, and other indicators meet the subsequent processing needs.

2. Surface treatment: Clean, degrease, activate and other surface treatments are carried out on the PI film to improve the adhesion and uniformity of the aluminum coating.

3. Vacuum evaporation: In a 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. During this process, precise control of parameters such as vacuum degree, evaporation temperature, and evaporation rate is required to ensure the quality and thickness of the coating.

4. Post processing: Cooling, curing, testing and other post-processing are carried out on the PI film after aluminum plating to improve the stability and performance of the product.

Workshop Display

Overview of Application Fields of High Temperature Reflective Films

1、 Spacecraft and Satellite Thermal Control System

This is the most classic and demanding application field of PI aluminum plated film, which is a concentrated reflection of its irreplaceable performance.

Multilayer insulation component reflector layer: As the core layer material of multi-layer insulation components for spacecraft. The high infrared reflectivity of the aluminum layer can reflect most of the radiated heat back, while the PI substrate provides mechanical support and can withstand high and low temperature alternation, vacuum ultraviolet, and particle irradiation in space. It is a key material for achieving passive thermal control of spacecraft and maintaining temperature stability of internal equipment.

Solar sail and thermal control coating substrate: A flexible substrate used for the reflective surface of solar sails or special thermal control coatings, utilizing its lightweight, high reflectivity, and ability to wrap over a large area.

2、 Electronic, Electrical, and Thermal Management

By utilizing the conductive and reflective properties of aluminum and the temperature resistance and insulation properties of PI, we can solve the heat dissipation and shielding problems of high-end electronic devices.

High power device heat dissipation and equalization: attached to the back or heat dissipation module of high-power chips (such as CPU, GPU, RF module), serving as a flexible substrate for high-performance equalization plates or thermal pads. The aluminum layer can quickly diffuse heat laterally, while the PI layer provides electrical isolation.

Flexible electromagnetic shielding and grounding: As a local shielding layer and grounding layer for flexible circuit boards (FPCs) or precision electronic modules, it provides excellent electromagnetic interference (EMI) protection, especially suitable for space limited or bending applications.

Heat resistant film with high tenderness: Utilizing the conductivity of aluminum layers to create circuits that generate Joule heat through electrical current. The PI substrate enables it to withstand high temperatures and work for a long time, and is used for anti freezing of aerospace pipelines, environmental insulation of precision instruments, etc.

3、 Precision Optics and Display

Utilizing the ultra-high reflectivity of aluminum in the ultraviolet visible near-infrared band (up to 92% or more) and the smooth surface of PI.

High precision flexible reflector: used for lightweight focusing systems, scanning mirrors, laser cavity reflectors, etc. that have strict requirements for weight and shape. Its flexibility allows for the creation of complex surfaces such as non spherical surfaces.

Display and lighting optical components: As reflective sheets and brightening film substrates in high-end projection systems and backlight modules, they improve light efficiency. The temperature resistance of PI enables it to withstand long-term baking from high-power light sources.

Infrared camouflage and radiation cooling: Through specific structural design, used to regulate the radiation characteristics of targets in the infrared band, applied to special infrared camouflage or radiation cooling surfaces.

4、 Special Packaging and Barrier

Combining the high barrier properties of PI with the moisture and light blocking properties of aluminum, it is used in situations that require extremely long shelf life or special protection.

High reliability vacuum packaging: used as a vacuum or inert gas packaging bag for aerospace grade electronic components and military sensors, providing excellent airtightness, moisture resistance, and cosmic ray resistance.

Special drugs and food packaging: Packaging materials used for special drugs, high-end foods, or military field rations that require long-term stable storage.