Unfilled Polybutylene Terephthalate (PBT)
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Poly(butylene terephthalate) (PBT)
 

Thermo-Physical Properties

PROPERTYUNITVALUE / RANGE
Melting Point °C220 - 225
Density g mL-1 1.30
Coefficient of Thermal Expansion x 10-5cm / (cm °C) 10.8 - 14.4
Heat Deflection Temperature, 0.5 MPa °C 50 - 73
Heat Deflection Temperature, 1.8 MPa °C 115 - 184
Thermal ConductivityW / mK 0.17 - 0.23
Rockwell Hardness,  M/R Scalen/a R95 - R125
    
 

Mechanical Properties at 23 °C

PROPERTY UNITVALUE / RANGE
Tensile Strength, Yield at 23 C MPa 58 - 60
Tensile Strength, Break at 23 C MPa 34 - 60
Elongation, Yield % 4 - 10
Elongation, Break % 5 - 8
Tensile Modulus at 23 CMPa 1600 - 2700
Flexural Strength, Yield MPa 50 - 85
Flexural Modulus  MPa 1600 - 2400
Compressive Strength MPa 
Izod Notched J / m 3.5 - 90
Izod Unnotched J / m 3.5 - 4.0
 

Electrical Properties

PROPERTY UNITVALUE / RANGE
Volume Resistivity
Ohm-cm> 1013
 Dielectric Strength V/mm x 104 2.6 - 3.2
Dielectric Constant @ 1 MHz n/a 3.2
Dissipation Factor @ 1 MHz n/a, x 10-4 200
 

Other Properties

PROPERTY UNITVALUE / RANGE
Processing Temperature
°C 205 - 275
Mold Shrinkage % 0.001 - 0.004
Continuous Service Temperature °C 52 - 84
Water Absorption, 24 hr. Immersion% 0.4
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