Injection Molding
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Insufficient strength of PBT injection molded parts (unreinforced)
Fenómeno del problema
Pure PBT injection molded products easily break when stressed, and the strength does not meet the requirements.
Análisis de la causa
Pure PBT resin itself has limited strength and modulus (tensile strength about 55MPa), no reinforcing materials such as glass fiber are added, and there is internal stress.
Solución
Switch to glass fiber reinforced grades (30%GF tensile strength can reach more than 130MPa); optimize the molding parameters to reduce internal stress.
Conclusión clave
PBT engineering applications usually require glass fiber reinforcement to meet strength requirements.
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