PBT Film

PBT Film delivers excellent electrical insulation, high abrasion resistance, and good dimensional stability under thermal stress. Its thin, flexible nature makes it suitable for high-performance insulating layers, optical barriers, and mechanical protection in compact assemblies. Industries such as electronics, automotive, and renewable energy use it for capacitor films, motor slot liners, and photovoltaic backsheet layers. Specific uses include dielectric layers in high-voltage components, protective insulation in automotive electronics, and thin-film barriers for environmental sealing. In research, PBT film is studied for its dielectric breakdown strength, thermal endurance, and mechanical wear resistance. Its ability to balance electrical and mechanical performance makes it indispensable in modern electrical and energy systems.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil

Thickness		±20%

Material Properties for Polymers

Chemical Resistance

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

Electrical Properties

Element	Value
Dielectric constant @1kHz	3.2
Dissipation factor @ 1kHz	0.002
Dielectric strength( kV mm⁻¹ )	20
Volume resistivity( Ohmcm )	10¹⁵

Physical Properties

Element	Value
Flammability	HB
Radiation resistance	Good
Resistance to Ultra-violet	Fair?
Limiting oxygen index( % )	25
Water absorption - over 24 hours( % )	0.1
Density( gcm⁻³ )	1.31

Mechanical Properties

Element	Value
Hardness - Rockwell	M70
Elongation at break( % )	250
Tensile modulus( GPa )	2
Izod impact strength( J m⁻¹ )	60
Tensile strength( MPa )	50

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	150
Heat-deflection temperature - 1.8MPa( C )	60
Upper working temperature( C )	120
Specific heat( J K⁻¹ kg⁻¹ )	1200-2300