Plastic cups are loved by many people because of their changeable shapes, bright colors, and the characteristics of not being afraid of falling. They are very suitable for outdoor users and office workers. Generally speaking, the bottom of the plastic cup has a mark, which is the number on the small triangle. The common one is “05″, which means that the material of the cup is PP (polypropylene). The cup made of PP has good heat resistance, the melting point is 170 ° C ~ 172 ° C, and the chemical properties are relatively stable. In addition to being corroded by concentrated sulfuric acid and concentrated nitric acid, it is relatively stable to other chemical reagents. But the problem with ordinary plastic cups is widespread. Plastic is a polymer chemical material. When a plastic cup is used to fill hot water or boiling water, the polymer is easily precipitated and dissolved into the water, which is harmful to human health after drinking. Moreover, the internal microstructure of plastic has many pores, which hide dirt, and bacteria will breed if it is not cleaned properly. Therefore, the selection of plastic cups is very important for the selection of plastic materials, and food-grade plastics that meet national standards must be selected. That is PP material
Post time: Sep-05-2022