Dielectrics

Film Dielectrics

Basic Properties | Typical Temperature Characteristics
 

 

Basic Properties of Film Dielectrics

Property Polypropylene Polyester (Mylar) Polycarbonate Polystyrene
Dielectric Constant 2.3 3.2 3.0 2.5
Density 0.905 1.395 1.20 0.95
Area Factor
in2/lb/mil		 30.600 19.800 23.100 26.500
Temperature Rating
(for capacitors) °C		 105 125 125 85
Dissipation Factor
% at 106 Hz		 0.02 1.6 1.0 0.01
Flatness of Electrical
Properties		 Excellent Fair Good Excellent
Dielectric Strength
V/mil at 1 mil		 7.000 7.000 4.000 5.000
Tensile Strength
lb/in2		 28.000 30.000 8.000 5.000
Moisture Sensitivity None Small Moderate None

 

Typical Temperature Characteristics

Polypropylene

Polyester (Mylar®)

Polycarbonate

Polystyrene

EFC will manufacture to any non-standard value and size. Please consult factory for special requirements.