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Formula: PI
Form: Laminate
Material: Polyimide (PI)
CAS Number: 60842-76-4
Commodity: Polymers
Coil Width: 610mm
Polyimide Laminate Coil combines the exceptional thermal stability, chemical resistance, and dielectric strength of polyimide with reinforcement layers tailored for mechanical durability. Supplied in a continuous rolled format, it is ideal for creating high-performance insulation wraps, flexible printed circuits, and barrier layers in aerospace and electronics manufacturing. The laminated structure enhances tear resistance and dimensional stability while maintaining flexibility for precision wrapping or lamination in complex assemblies. Applications include insulation for high-voltage windings, flexible heater substrates, and multilayer circuit bases. Research uses involve developing hybrid laminate composites, improving thermal cycling endurance, and studying adhesion characteristics between polyimide and reinforcing layers. The coil form enables efficient handling and production of long, continuous sections for streamlined fabrication.
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Tolerances

Laminate
Thickness ±10%
Coil
Coil Width =<100mm ±1mm
Coil Width >100mm +2% / -1%
Length +10% / -0%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Poor
Acids - dilute Fair
Alcohols Poor
Alkalis Poor
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good
Halogens Fair
Ketones Good
Mechanical Properties
Element Value
Coefficient of friction 0.42
Hardness - Rockwell E52-99
Elongation at break( % ) Aug-70
Tensile modulus( GPa ) 2.0 – 3.0
Izod impact strength( J m⁻¹ ) 80
Tensile strength( MPa ) 70-150
Electrical Properties
Element Value
Dielectric constant @1MHz 3.4
Dissipation factor @ 1kHz 0.0018
Dielectric strength( kV mm⁻¹ ) 22
Surface resistivity( Ohm/sq ) 10¹⁶
Volume resistivity( Ohmcm ) 10¹⁸
Physical Properties
Element Value
Flammability V0
Radiation resistance Good
Refractive index 1.66
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 53
Water absorption - over 24 hours( % ) 0.2-2.9
Density( gcm⁻³ ) 1.42
Thermal Properties
Element Value
Heat-deflection temperature - 1.8MPa( C ) 360
Lower working temperature( C ) -270
Upper working temperature( C ) 250-320
Specific heat( J K⁻¹ kg⁻¹ ) 1090
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.1-0.35@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 30-60

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