PI Heating Film

PI Heating Film is a composite material with PI heating film as the outer insulator and metal foil or wire as the inner conductive heat generator. This material is thermally bonded at high temperature and high pressure, and has excellent insulating strength, electric resistance, heat transfer efficiency and resistance stability.

Product Characteristics

1. Excellent insulating strength:PI heating film has high insulating strength, which makes it safe for use in various electrical equipment.

2. Excellent electrical strength:it can withstand higher voltages without breakdown, which increases its reliability in high-voltage environments.

3. Excellent heat transfer efficiency:PI heating film heaters are able to conduct heat quickly, which makes them very effective in heating applications.

4. Excellent resistance stability:Its resistance value can remain stable during long-term use, which helps to maintain equipment performance and heating efficiency.

5. High temperature tolerance:PI heating film electric heating film can be used for a long time in high temperature environments, the use temperature can reach 232 ℃.

6. Lightweight:PI heating film electric heating film is lightweight, which is very useful in applications where the weight of the equipment needs to be reduced.

7. Thin:The film form makes it easy to install and use in space-constrained applications.

8. Wide range of applications:Due to the above characteristics, PI heating film is widely used in aerospace, military equipment, medical equipment, scientific instruments and automotive industry.

9. Precise temperature control:it can realize quite high temperature control precision in the heating field, which is suitable for the occasions that need precise temperature control.

10. Good compatibility:it can be compatible with a wide range of materials and equipment, easy to integrate into existing systems.

11. Chemical resistance:polyimide material itself has good chemical stability, able to resist the erosion of a variety of chemicals.

12. Mechanical properties:PI heating film has high mechanical strength and flexibility, able to withstand certain mechanical stress.

Working principle

The metal heat sink acts as the heat generator, and the polyimide (PI) film acts as the outer insulating material. When the electric current passes through the metal heat sink, according to Ohm's law, the electric energy will be converted into heat energy, and the metal sheet will be heated due to resistance. Since the metal has good thermal conductivity, it can quickly conduct the heat energy converted from electrical energy to the contact objects. At this time, the PI heating film not only as an insulating layer to prevent current leakage, but also play a role in insulating and protecting the metal heat sink, its temperature resistance and electrical insulation properties to ensure that the metal sheet at high temperatures are not oxidized or damaged. Eventually, the object to be heated comes into contact with the polyimide metal heat sink, and through the heat conduction properties of the film, the heat energy is transferred to the surface of the object in a short period of time, realizing the heating effect. This kind of heating film has high heating efficiency and fast heating speed, applicable to a variety of occasions requiring heating treatment .

The heat transfer efficiency and resistance stability of PI heating film heating foils are due to their material properties, including excellent dielectric strength, electrical resistance and temperature limitation (≤ 232 °C) for long-term use. These properties make polyimide metal heating film play an important role in applications such as scientific analyzers, medical instruments, deep-cooled environmental equipment, vacuum heating and baking fields, defrosting sheets for automotive mirrors, snow and frost removal heating elements for antennas or radars, and speed-regulating resistor sheets.

Application Fields

1. Aerospace field:PI heating film electric heating film has been successfully applied in high-end equipments such as Fengyun series of artificial satellites and Long March series of carrier rockets for temperature control and heating system.

2. Military equipment:in the Dongfeng, Red Flag and other series of missiles, as well as aircraft, ships, tanks, artillery gyroscopes, accelerometers, fire-control radar and other equipment, PI heating film heaters also play an important role.

3. Scientific analytical instruments:to provide a constant temperature source for thermal conductivity (or warmth factor) measuring instrument, stabilize the working temperature of optoelectronic components.

4. Medical Instruments:In the health care and beauty equipment industry, PI heating film is used as a heating element because of its stability and safety.

5. Automotive industry:used in automotive rearview mirror defroster, antenna or radar snow removal, defrost heating element and speed control resistor sheet.

6. Flexible electric heating elements:PI heating film is used in flexible electric heating elements and low-voltage wearable devices because of its flexibility and high temperature resistance.