Relationship Between Internal Pressure And Resistance To Thermal Shock Of Glass Containers

The main objective of this study is to investigate the relationship between internal pressure and the thermal shock which is delivered to reused glass containers, for instance, during pasteurisation in a bottling plant. An approximately linear relationship was found between internal pressure and thermal shock at a 50% cumulative bottle breakage, and fracture origins gradually shifted to the upper sidewall with increasing internal pressure. It is also worth noting that the thermal stress at the crack tips corresponded to 30-40% of the thermal stress at the surface at the moment of breakage.