Because the chemical reaction of second-hand tons of barrels exposed to the sun is caused by multiple factors, such as ultraviolet light. The dominant factor of photochemical reaction can directly cause the molecular chain to break. It can accelerate the aging of tons of barrels, because rubber and plastic materials will generate free radicals when absorbing light energy, which will trigger and accelerate some unfavorable chain reactions. In fact, tons of barrels will fade after a period of exposure to the sun. Moreover, if the raw materials of many products are unqualified, some toxic substances will be released under high temperature conditions.
This will affect its service life and even harm human health. Therefore, when transporting, it is often added with a layer of tarpaulin, rain-proof sunscreen and other protective products.