PBT (Polybutylene terephthalate) – glass fibre + mineral filler

Quality Scores

Mechanics ★★★★☆

Thermal ★★★★☆

Chemical ★★★★☆

UV ageing ★★☆☆☆

Injection moulding difficulty ★★★★☆

Recycling ★★★☆☆

Performance profile

Mechanical properties

Mechanical properties of PBT (polybutylene terephthalate) – glass fibres + mineral filler

Density	1.42 to 1.86 g/cm³ ISO 1183 ⋯
Charpy notched impact	4.8 to 10 kJ/m2
Flexural modulus	5,850 to 11,000 MPa ISO 178
Flexural resistance	160 MPa
Tensile modulus	7750 to 14600 MPa ISO 527-1
Tensile resistance	82.8 to 106 MPa ISO 527-1, -2, Break ⋯
Tensile strain	1.5 to 2.5 % ISO 527-1, -2, Break ⋯

Chemical resistance and characteristics

Chemical resistance

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Recommended applications

• Electrical and electronic connectors, automotive sensor housings, under-the-bonnet parts, household appliance equipment, switches and sockets, meter housings, precision mechanical parts

Frequently asked questions

Implementation — Plastic injection

Recycling & Sustainability

🍽️ Food Contact & Certifications

Hybster Team

Hybster Engineering Team

Design Office – Plastics Design & Engineering

The Hybster Design Office brings together the company's plastic engineering, mechanical, and industrialisation engineers. The team supports projects from the ideation phase through to series validation, incorporating Design For Manufacturing (DFM), rheological simulation, material selection, and mould design. It serves the automotive, electronics, electrical, EV charging, and industrial sectors.

Injection moulded part design DFM Simulation Moldflow Subject choice Moulds for conception ISO 20457 Tolerancing

See Hybster Bureau d'études' 307 contributions →