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Application of Engineering Plastic PBT in Electronic and Electrical Industry

Polybutylene terephthalate(PBT). At present, more than 80% of the world’s PBT are modified after use, PBT modified engineering plastics with its excellent physical, mechanical and electrical characteristics in the electrical and electronic field is increasingly widely used.

Modified PBT material properties

1. Excellent mechanical properties, especially high rigidity and hardness;

2. Good heat resistance, thermal deformation temperature can reach 180℃ or above;

3. Good surface gloss performance, especially suitable for spraying free electronic and electrical products;

4. Fast crystallization speed, good fluidity, good molding;

5. Good thermal stability, especially low thermal expansion rate and size shrinkage rate;

6. Good resistance to chemicals, solvents, weather resistance, high dielectric strength, good electrical performance;

7. Low hygroscopicity, little influence on electrical and dimensional stability.

PBT material series products


Modification Plan



Glassfiber Reinforced

Modified PBT, with glassfiber reinforced  

+20% GF

Home appliance skeleton, power tool exterior, lawn mower



+30% GF




+40% GF


Flame Retardant Grade

Modified PBT, flame retardant

+15% GF, FR V0

Electrical connector, compressor terminal board, electric housing, lamp holder material



+30% GF, FR V0



Modified PBT, halogen-free flame retardant

Halogen-free flame retardant

Electrical connector, compressor terminal board, electric housing, lamp holder material



General FR V0

Connectors, timers, electrical switches, adapters


Normal flame retardant

Paper white FR V0


Filled Grade

Modified PBT, with mineral reinforced

Filler reinforced, good dimensional stability 

Auto parts

Application of PBT in electronic and electrical industry

Electrical name

Energy-saving lamp



Vending machines, telephones

PBT’s specific applications

Energy-saving lamp head

Partial coil frame

Slots and connectors on the motherboard

Part of telephone enclosure



Focusing potentiometer housing

External ports such as USB

Partial coil frame



Connector on circuit board

Heat dissipation fan on the CPU chip

Miniature relay housing



Miniature relay housing

Cooling fan


1. Energy-saving lamp holder

PBT is widely used in the energy saving lamp industry. More than 90% of plastic energy saving lamp heads are made of PBT material. Product performance requirements good color, color transparent, color selection, UL94 flame retardant V0, good electrical insulation, good mechanical properties, easy to process.

2. The connector

Connector material is mainly glass fiber reinforced PBT, performance requirements to UL 94 V0 flame retardant, good strength and toughness, low moisture absorption, electrical and dimensional stability little influence, good surface, good luster, no obvious floating fiber.

3. Computer cooling fan

The product performance requirements can withstand the high temperature of 130℃ for a long time, good surface gloss performance and high flame retardant performance.

4. Other products


Post time: 11-10-22