Injection Molding
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PETG and elastomer overmolding poor bonding
Fenómeno del problema
When overmolding TPE/TPU elastomer onto a rigid substrate, the bonding force is insufficient.
Análisis de la causa
The substrate surface cools quickly and wets poorly, the materials are incompatible, and the substrate surface is untreated.
Solución
Plasma or primer pretreatment of the substrate surface; increase the overmolding material temperature; select a compatible elastomer.
Conclusión clave
PETG overmolding requires substrate pretreatment and material selection.
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