Molding Process
4 visualizaciones
EVOH Surface Stress Whitening
Fenómeno del problema
Stress whitening on stressed areas of EVOH product surfaces, affecting appearance and strength
Análisis de la causa
EVOH molecular orientation under local stress causes refractive index difference and whitening; areas of internal stress concentration in the product
Solución
1) Reduce injection speed to decrease orientation stress; 2) Anneal at 80°C/2h to release stress; 3) Product design to avoid stress-concentrating sharp corners
Conclusión clave
Stress whitening is caused by orientation and internal stress; reducing orientation and annealing are key
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!