Impact of Repeated Washing Cycles on Surface Integrity and Mechanical Properties of Glass Bottles

Glass bottles are a top choice in the global beverage industry, but their inherent brittleness poses challenges in maintaining durability. This study focused on investigating the impact of numbers of washing processes from reusing on the surface quality and mechanical properties of glass bottles after each washing cycle. Contact angle technique was used to determine surface quality of glass bottles. It was found that mechanical integrity, as reflected in internal pressure resistance values, and surface quality of glass bottles exhibited an exponential decline with each washing cycle. Furthermore, a predictive model (R2 = 0.8882) was developed to estimate its internal pressure resistance of a bottle at a specific number of washing cycles. These findings have significant implications for the reuse of glass bottles. As washing cycles increase, the declining integrity could lead to a higher rate of bottle failures. Reusing glass bottles, while environmentally beneficial, requires careful consideration of the washing process to balance longevity with sustainability goals.