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The high-speed fracture process of glass bottles when using underwater shockwaves and the glass bottle recycling technology that uses this crushing technique are discussed. The proposed technique is an efficient method for the smashing and washing of glass bottles. The production cost of producing cullet, which is small glass fragments, can be decreased as a result. In this study, using commercial beer bottles, the relationship between the cullet size and various explosive conditions were clarified. Moreover, the behaviour of the underwater shockwaves was observed by the framing photograph method, the shadowgraph method and the illumination photography method, and the FEM simulation was executed in order to clarify the high-speed fracture mechanism.

High-speed fracture behaviour of glass bottles when using underwater shockwaves