Application of PBT in Charging Gun Materials

2026-01-16

Selecting materials for charging gun connectors involves evaluating several options, including PET, PBT, and PA (nylon). While PA (polyamide) reinforced with glass fiber and flame retardant (PA+GF+FR) is often a primary choice for many customers, PBT+FR becomes a preferred alternative when dimensional stability and minimal shrinkage are critical. PET also serves as a viable material selection option.

Charging gun materials must pass rigorous tests for mechanical performance, temperature resistance, flame retardancy (FR), and electrical properties. PBT (Polybutylene Terephthalate), a thermoplastic polyester, is particularly well-suited for plugs and sockets due to its excellent mechanical strength, high electrical insulation, good thermal properties, strong weather resistance, and cost-effectiveness. For the connection base, the primary material selection schemes are PA+GF+FR or PBT+FR. When enhanced strength and rigidity are needed, a composite like PBT with 15-30% glass fiber and flame retardant (PBT+GF+FR) is considered.