Extrusion & Post
6 visualizaciones
Bottom bursting of PET stretch-blow bottles
Fenómeno del problema
The bottom of PET bottles bursts during inflation or dropping, especially carbonated beverage bottles.
Análisis de la causa
Improper bottle bottom design (draw ratio too large and over-thinned); molecular chains at the bottom injection point are highly oriented but weakly bonded.
Solución
Optimize the bottle bottom geometry, increasing the bottom radius and adopting a petaloid bottom; adjust preform bottom heating; control pre-blow and main-blow timing.
Conclusión clave
PET bottle bottom bursting is one of the most dangerous defects.
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!