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Electrical Grade Polyamide/imide Film

Grade: Electrical Grade
Formula: PAI
Form: Foil/Film/Sheet
Material: Polyamide/imide (PAI)
Commodity: Polymers
Torlon® 4203L Polyamide/Imide films are a high-performance thermoplastic film material. With 14 variations available, they provide an optimal balance of mechanical, thermal and chemical resistance properties for demanding applications. Example uses include aerospace components, bearings, bushings, and electrical insulators where durability at high temperatures is critical.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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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
Pultrusions
Element Value
Compressive strength( MPa ) 170-220

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