Processing Machinery
8 visualizaciones
LDPE Film Surface Roughness
Fenómeno del problema
The film surface is rough and uneven like frosted glass, sometimes with fine ripples.
Análisis de la causa
An overly long die land section or too small gap triggers melt fracture; raw material impurities also damage the surface; improper temperature control makes surface tension uneven.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solución
①Check the matching between the die and the raw material; ②Adjust die temperature for uniformity; ③Reduce extrusion speed to leave time for cooling; ④Strictly screen raw materials.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Conclusión clave
Investigate surface roughness from three directions: die, temperature, and raw material; a frosted-glass appearance mostly indicates a melt fracture tendency.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!