PBT Granules

PBT Granules are the raw thermoplastic form of polybutylene terephthalate, offering high crystallinity, good chemical resistance, and excellent processing stability. Their granulated form is optimized for injection molding and extrusion, enabling precise manufacturing of complex parts. Industries such as automotive, consumer electronics, and industrial machinery use them for gears, connectors, and structural housings. Specific applications include injection-molded precision gears for printers, robust casings for power tools, and structural brackets in vehicles. In research, PBT granules serve as a base material for composite development, additive manufacturing feedstock, and property modification studies. Their consistency, processability, and durability make them an essential engineering plastic for high-performance molded components.

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Properties

Reference & Citations

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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