PEI Film

PEI films are high-performance thermoplastic films that provides excellent mechanical, thermal, and chemical resistance properties. With 69 variations, Goodfellow's range of PEI films offers options for different thicknesses, sizes and surface finishes. Example applications of PEI films include electrical insulation, medical devices, aerospace components and automotive parts, where its strength, heat resistance, and dielectric properties are advantageous. Our diverse choice of PEI films makes this versatile engineering plastic suitable for many demanding applications across a range of industries.

Formula: PEI
Thickness: 6.4mm
Length 1: 200mm
Length 2: 200mm
Colour: Clear Amber
CAS Number: 61128-46-9
UOM Code: 304-078-52

SKU: 1000073718

Product Code: EI31-SH-000160

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Tolerances

Foil

Thickness		±20%

Tolerances

Foil

Thickness		±20%

Technical Data Sheet

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Material Properties for Polymers

Chemical Resistance

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

Electrical Properties

Element	Value
Dielectric constant @1kHz	3.1
Dissipation factor @ 1MHz	0.0013@1
Dielectric strength( kV mm⁻¹ )	30@1.6mm
Surface resistivity( Ohm/sq )	4.10¹³
Volume resistivity( Ohmcm )	7.10¹⁵

Physical Properties

Element	Value
Flammability	V-0 @ 0.4mm
Radiation resistance	Good
Resistance to Ultra-violet	Good/Fair
Limiting oxygen index( % )	47
Water absorption - equilibrium( % )	1.3
Water absorption - over 24 hours( % )	0.25
Density( gcm⁻³ )	1.27

Mechanical Properties

Element	Value
Hardness - Rockwell	R125
Poisson's ratio	0.44
Elongation at break( % )	60
Compressive modulus( GPa )	2.9
Tensile modulus( GPa )	2.9
Izod impact strength( J m⁻¹ )	50
Abrasive resistance - ASTM D1044( mg/1000 cycles )	10
Tensile strength( MPa )	85

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	200
Heat-deflection temperature - 1.8MPa( C )	190
Upper working temperature( C )	170-200
Specific heat( J K⁻¹ kg⁻¹ )	2000
Thermal conductivity( W m⁻¹ K⁻¹ )	0.22@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	56