Molding Process 8 visualizaciones

EVA foam becomes hard due to excessive crosslinking

Fenómeno del problema

EVA foam crosslinking >85%, hardness C55, feels hard when worn with poor elasticity

Análisis de la causa

DCP >1wt% too high; crosslinking time too long; temperature >180°C

Solución

1) Reduce DCP to 0.4-0.6wt% with crosslinking 60-70%; 2) Crosslinking time 6-8min; 3) Temperature 160-175°C

Conclusión clave

Excessive crosslinking is caused by too much DCP; moderate crosslinking is key

EVA foam excessive crosslinking DCP dosage crosslinking time hardness control

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