How does the PET bottle pre-washing machine wash the bottles?

The bottle washing machine washes the bottles with hot water and chemical. The specially designed structure makes the bottles moving in the designated orbit to get a duration in the bottles and the friction on the surface of the bottles will remove the mud, sand, some oil, some glue outside the bottles. The paper label and PP label can be removed in the machine also by friction power and hot chemical solution. The most important issue is to heat the PVC bottles, make them whitening and easy to be distinguished from PET bottles for easier manual sorting.
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