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Polyimide film

Polyimide film is a high-performance polymer material known for its exceptional thermal stability, chemical resistance, and electrical insulating properties. It is made from polyimide resin, which is processed into thin, flexible films. This film can withstand high temperatures and is used in a variety of demanding applications.

1. Introduction to Polyimide Film

Polyimide film is a high-performance polymer material known for its exceptional thermal stability, chemical resistance, and electrical insulating properties. It is made from polyimide resin, which is processed into thin, flexible films. This film can withstand high temperatures and is used in a variety of demanding applications.

2. Key Characteristics

  • Thermal Stability: Can operate at high temperatures, typically up to 250°C (482°F) continuously.
  • Chemical Resistance: Resists various chemicals, including acids and solvents.
  • Electrical Insulation: Provides excellent electrical insulation, suitable for use in electronic and electrical applications.
  • Mechanical Properties: High tensile strength and durability.

3. Applications

Polyimide film is used in a wide range of industries, including:

  • Electronics: As an insulating material for flexible circuits, chip carriers, and other electronic components.
  • Aerospace: In aircraft and spacecraft components due to its high-temperature resistance.
  • Automotive: For insulation in high-temperature environments, such as under-the-hood components.
  • Industrial: In various applications requiring high temperature and chemical resistance.

4. Specifications

  • Thickness: Typically ranges from 1 to 100 micrometers.
  • Color: Generally amber or yellowish, but can be customized.
  • Width: Available in various widths according to customer requirements.
  • Thermal Rating: Continuous use temperature up to 250°C.

5. Benefits

  • High Temperature Resistance: Maintains performance and stability at elevated temperatures.
  • Flexibility: Can be used in applications where flexibility is required.
  • Durability: Resistant to wear and tear, extending the lifespan of components.
  • Electrical Performance: Excellent dielectric properties make it ideal for electrical insulation.

1. Appearance: The film surface should be smooth and clean, free from wrinkles, tears, particles, bubbles, pinholes, and foreign impurities. The edges should be neat and undamaged. The film is supplied in rolls.

2. Dimensions:

     1) Thickness and Tolerance: The recommended thickness can also be supplied according to the customer's requirements.

Standard Thickness 25μm 40μm 50μm 75μm 100μm
Allowable Tolerance +4μm +6μm +7μm +8μm +10μm
-3μm -5μm -6μm -6μm -7μm

 

  2) Width: No less than 250 millimeters, with a tolerance of ±1.6 millimeters. Different widths can be cut according to customer requirements.

  3) Length: Supplied according to customer specifications.

3. Performance Requirements

No. Indicator Name Unit Index
25μm 40μm 50μm 75μm 100μm
1 Density g/cm3 1.400±0.020
2 Tensile Strength Longitudinal MPa ≥135
Transverse ≥115
3 Elongation at Break Elongation at Break % ≥35
4 Shrinkage Rate
150°C
400°C
%
≤1.0
≤3.0
5 Power Frequency Electrical Strength Average Value MV/m ≥150 ≥130 ≥110
Individual Value ≥100 ≥80 ≥70
6 Surface Resistivity at 200°C Ω ≥1.0X1013
7 Volume Resistivity at 200°C   Ω·M ≥1.0X1010
8 Relative Dielectric Constant (48-62 Hz)   3.5±0.4
9 Dielectric Loss Factor (48-62 Hz)   ≤4.0X10-3
10 Long-Term Heat Resistance Temperature Index     ≥180

 

 

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