PEI Film

Formula: PEI

Form: Foil/Film/Sheet

Material: Polyetherimide (PEI)

CAS Number: 61128-46-9

Commodity: Polymers

Polyetherimide (PEI) Film, also known as PEI polymer sheet, is renowned for its exceptional thermal stability, mechanical strength, and chemical resistance. This high-performance material is ideal for applications in the aerospace, electronics, and automotive industries due to its ability to withstand extreme temperatures and harsh environments. PEI Film’s excellent dielectric properties make it suitable for use in electrical insulation and high-frequency electronics. Goodfellow supplies this advanced film, ensuring it meets stringent industry standards and delivers consistent, high-quality results. The film’s inherent flame retardancy and low smoke generation further enhance its suitability for critical applications, such as medical devices and high-performance electrical components. Goodfellow’s PEI Film is engineered to support cutting-edge technological advancements, providing a reliable solution for demanding industrial needs.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

each

Tolerances

Foil/Film/Sheet

Thickness		±20%

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