Electrical Grade Polyamide-imide Film

Electrical Grade Polyamide-imide Film is a high-performance engineering polymer film known for its exceptional thermal stability, high dielectric strength, and outstanding mechanical integrity. Its electrical-grade classification ensures consistent insulation performance even under elevated temperatures, making it highly suitable for demanding electrical and electronic applications. The film’s excellent transparency, flexibility, and resistance to chemicals allow its use in industries such as electronics manufacturing, aerospace systems, and energy storage technologies. Specific applications include insulating layers in high-temperature motors and transformers, dielectric films in flexible printed circuits, and protective layers in advanced display systems. The combination of heat resistance, mechanical durability, and electrical reliability makes this film a preferred choice in environments where long-term performance and stability are essential. In research and industrial contexts, Electrical Grade Polyamide-imide Film is a critical enabling material for high-efficiency, high-reliability electronic and electromechanical systems.

Quick Links:

Tolerance

Properties

Reference & Citations

each

Tolerances

Foil/Film/Sheet

Thickness		±20%

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Fair-Poor
Acids - dilute	Fair
Alcohols	Good-Poor
Alkalis	Poor
Aromatic hydrocarbons	Good
Greases and Oils	Good
Halogenated Hydrocarbons	Good-Poor
Halogens	Good-Poor
Ketones	Good

Electrical Properties

Element	Value
Dielectric constant @1MHz	3.9-5.4
Dissipation factor @ 1MHz	0.03-0.042
Dielectric strength( kV mm⁻¹ )	23at 1mm
Surface resistivity( Ohm/sq )	8-50 x 10¹⁷
Volume resistivity( Ohmcm )	0.08-2 x 10¹⁷

Physical Properties

Element	Value
Flammability	V0
Radiation resistance	Good
Resistance to Ultra-violet	Good
Limiting oxygen index( % )	44-45
Water absorption - equilibrium( % )	03-Apr
Water absorption - over 24 hours( % )	0.3
Density( gcm⁻³ )	1.42-1.46

Mechanical Properties

Element	Value
Hardness - Rockwell	E72-86
Poisson's ratio	0.38
Elongation at break( % )	Jul-15
Tensile modulus( GPa )	4.5-6.8
Izod impact strength( J m⁻¹ )	60-140- notched
Tensile strength( MPa )	110-190

Thermal Properties

Element	Value
Heat-deflection temperature - 1.8MPa( C )	278-9
Lower working temperature( C )	-200
Upper working temperature( C )	200-260
Specific heat( J K⁻¹ kg⁻¹ )	1000
Thermal conductivity( W m⁻¹ K⁻¹ )	0.26-0.54@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	25-31