Extrusion & Post
5 visualizações
Bottom bursting of PET stretch-blow bottles
Fenómeno do problema
The bottom of PET bottles bursts during inflation or dropping, especially carbonated beverage bottles.
Análise das causas
Improper bottle bottom design (draw ratio too large and over-thinned); molecular chains at the bottom injection point are highly oriented but weakly bonded.
Solução
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.
Conclusão principal
PET bottle bottom bursting is one of the most dangerous defects.
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!