Plastic Cups: Pay Attention To Choosing Food Grade Plastic

Plastic cups are loved by many people because of their changeable shapes, bright colors, and the characteristics of not being afraid of being beaten. 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). PP cups have good heat resistance, with a melting point of 170 ° C ~ 172 ° C, and relatively stable chemical properties. In addition to being corroded by concentrated sulfuric acid and concentrated nitric acid, they are relatively stable to various other chemical reagents. But the problem with ordinary plastic cups is widespread. Plastic belongs to macromolecule chemical material. When hot water or boiled water is filled in a plastic cup, the macromolecule is easy to precipitate and dissolve 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. 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.