PBT (Polybutylene Terephthalate)

PBT is a semi-crystalline engineering thermoplastic offering excellent dimensional stability, electrical properties, and chemical resistance. It's particularly suitable for precision electrical components and automotive parts.

PBT (Polybutylene Terephthalate) Material Properties

Mechanical Properties

High strength and stiffness
Excellent dimensional stability
Good wear resistance
Low coefficient of friction
High creep resistance
Good fatigue resistance

PBT (Polybutylene Terephthalate) Thermal Properties

Heat deflection temperature: 120-150°C
Continuous use temperature: up to 120°C
Good thermal stability
Low thermal expansion

PBT (Polybutylene Terephthalate) Processing Properties

Good processability
Fast crystallization
Low mold shrinkage
Good flow properties
Suitable for thin-wall molding
Quick cycle times

PBT (Polybutylene Terephthalate) Parts Manufacturing Processes

Injection Molding

Excellent

Advantages

High precision parts
Good surface finish
Fast cycle times
Complex geometries possible

Key Parameters

melt temperature: 230-260°C

mold temperature: 60-80°C

injection pressure: 70-120 MPa

CNC Machining

Good

Advantages

Good dimensional accuracy
Excellent surface finish
No tooling costs
Small batch production

Key Parameters

cutting speed: 200-300 m/min

feed rate: 0.1-0.2 mm/rev

tool type: Carbide tools

3D Printing

Moderate

Advantages

Complex geometries
Fast prototyping
No tooling required
Design iterations

Key Parameters

nozzle temperature: 245-265°C

bed temperature: 80-100°C

layer height: 0.1-0.2mm

PBT (Polybutylene Terephthalate) Technical Specifications

density

1.30-1.38 g/cm³

water absorption

0.08-0.12%

tensile strength

50-60 MPa

flexural modulus

2200-2600 MPa

impact strength

40-80 J/m

heat deflection

120-150°C

dielectric strength

15-17 kV/mm

volume resistivity

10^15 Ω·cm

Processing Guidelines

molding temperature

230-260°C

mold temperature

60-80°C

drying conditions

120°C for 4 hours

injection pressure

70-120 MPa

recommended thickness

0.8-3.0 mm

PBT (Polybutylene Terephthalate) Parts Industry Applications

Electrical/Electronic

Connector housings
Switch components
Terminal blocks
Circuit board components

Automotive

Sensor housings
Mirror components
Fuel system parts
Under-hood components

Industrial

Pump components
Bearing cages
Gear wheels
Precision parts

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