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Formula: PBT
Form: Granule
Material: Polybutylene terephthalate (PBT)
CAS Number: 24968-12-5
Commodity: Polymers
Nominal Granule Size: 5mm
PBT Granules are a thermoplastic polyester resin available in granular form that exhibit good dimensional stability as well as chemical and heat resistance. With 14 size variations to choose from, PBT Granules can be injection molded into a wide array of industrial components and consumer products. Typical applications include automotive parts, electrical housings, gears, bearings, valves and food processing equipment. The granular form allows for convenient transport and processing.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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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

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