Material Drying
8 visualizaciones
DSTDP processing moisture causing silver streaks
Fenómeno del problema
DSTDP injection molded product surface shows white silver streak marks
Análisis de la causa
Raw material moisture >0.05% vaporizes during high-temperature processing forming bubbles that are stretched into silver streaks; insufficient drying or hopper condensed moisture
Solución
1) Dry raw material at 80°C for 3-4h to moisture <0.02%; 2) increase back pressure 0.5-1MPa for venting; 3) reduce injection speed to avoid air entrainment; 4) heat the hopper to prevent condensed moisture
Conclusión clave
Silver streaks are caused by moisture vaporization and stretching; drying and venting are the main countermeasures
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!