PBT (Polybutylene Terephthalate)
Description

PBT, Polybutylene Terephthalate, is a semi-crystalline thermoplastic engineering polymer that has an excellent balance of properties and processing characteristics. It has many attractive properties like good dimensional stability, high heat resistance, chemical resistance. PBT shows higher tensile, flexural, and dielectric strengths than many thermosets. It is often used as an insulator in the electrical and electronics industries.

Features
  • Outstanding Chemical Resistance to diluted acids, alcohols, aromatic hydrocarbons, ketones, solvents, oils, and greases…
  • Extremely High Electrical Resistance & High Dielectric Strength:It helps protect electrical and electronic components.
  • Low Molding Temperatures than many engineering plastics since it crystallizes rapidly.
  • Withstand Long-term Heat Exposure due to its high HDT and high temperature index.
  • Good Durability under thermal stress and harsh chemical environments.
  • Good Creep Resistance, Dimensional Stability, and Low Water Absorption.
Applications

Wiper covers, outer handles, mirror housings, cowl vents, cooling fan, fuel system components, connectors, bumpers, micro-motor housings, fuse boxes, ignition system parts, couplers, power tool casings, IC sockets, plug connectors, circuit breakers, terminal boards, keyboards, dryer nozzles, toothbrush bristles, lamp base, iron handles…

/storage/media/products/plastic-resin/engineering_polymers/pbt/pbt-app.jpg
Technical Data
Item Property Test Method Unit Value
Physical Density ASTM D792 g/cm3 1.56
Water Absorption ASTM D570 % 0.07
Rockwell Hardness ASTM D785 R scale 118
 
Mechanical Tensile Modulus ASTM D638 psi 1.2 × 106
Tensile Strength ASTM D638 psi 16,000
Tensile Elongation ASTM D638 % 3.0 – 4.0
Flexural Modulus ASTM D790 psi 1.00 × 106
Flexural Strength ASTM D790 psi 24,000
Izod Impact ASTM D256 ft-lb/in 1.0
 
Thermal Heat Deflection Temperature at 264 psi ASTM D648 °C/°F 190 / 374
Coefficient of Linear Thermal Expansion ASTM D696 in./in./°F 4.5 x 10-5
Flammability ASTM D635 - HB
 
Electrical Electrical Volume Resistivity ASTM D257 Ω-cm >1013
Surface Resistivity ASTM D257 Ω / sq 3.0 × 1015
Dielectric Constant ASTM D150 1 MHz 3.5
Dissipation Factor ASTM D150 1 MHz 0.02
Dielectric Strength ASTM D149 V/mm 19,700