In fact, the composition of plastic barrels cannot be simply determined. Generally speaking, there are three common types of plastic buckets: PE, PP, and PVC. Of course, they are also made of PC, ABS, and PS. However, considering the cost, the first three are mostly. Most of the components in plastics are oil-soluble, except for some additives, such as lime powder, and of course methanol, which are all soluble. The red part you have precipitated is mainly the toner added to the original plastic. Generally speaking, there is no problem with hot ones, especially those made of PP and PC, but not PVC. The white food-grade plastic barrel may be a polyethylene plastic barrel. Over time, polyethylene can be dissolved in a large amount of alcohol to further precipitate polyethylene solids (that is, a needle-like crystal seen). The white food-grade plastic barrel should be Manufactured from polyethylene, a plastic that is very resistant to chemicals and organic solvents and cannot be dissolved by alcohol. The precipitated needle-like crystals may be other substances dissolved in the liquor. When the temperature, storage environment, etc. change, the saturated solubility of the substance decreases, that is, there are precipitated crystals.
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