PBT. Engineering thermoplastic. Electrical-grade.
PBT (Polybutylene Terephthalate) — engineering thermoplastic. Excellent electrical properties, heat resistance, dimensional stability. Standard for connectors, electrical components.
PBT plastic
Both polyesters. PBT processes easier, faster crystallization. PET clearer, used for bottles. PBT for engineering.
Key principles.
Semi-crystalline
High crystallinity gives stiffness and chemical resistance. Density 1.31 g/cm³.
UTS 50-60 MPa
Stiff, strong, dimensionally stable. Glass-filled grades higher.
UL94 V-0 grades
Self-extinguishing flame-retardant grades. Standard for electrical.
HDT 60°C unfilled, 200°C glass-filled
Glass-filled grades survive solder reflow temperatures.
Excellent
Resists most chemicals at room temp. Limited at elevated temp.
Connectors, electrical
Electrical connectors, switches, automotive ignition components.
FAQ
Both polyesters. PBT processes easier, faster crystallization. PET clearer, used for bottles. PBT for engineering.
30% glass standard for high-strength PBT. Doubles modulus, raises HDT to 200°C.
Standard PBT V-2. Flame-retardant grades V-0 (self-extinguishing). Electrical industry standard.
Pure PBT hydrolyzes in hot water. Hydrolysis-resistant grades available for automotive coolant exposure.
PBT laser-welds well. Standard for automotive electrical connector assembly.
Nylon (PA) similar applications. PBT stiffer, less moisture absorption. Higher cost.
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