If you often drink hot water, you can choose high-end PPSU. PA 12, which is commonly used at temperatures above 120 degrees, has strong anti-aging ability, and low-end PP can withstand temperatures above 100 degrees, but the common temperature is about 80 degrees, which is easy to age and cheap.

The middle end is temperature-resistant PCTG, which has high strength and stronger temperature resistance than PP. If you just drink cold water, the PC has a higher cost performance, but it is easy to separate BPA from BPA by releasing hot water.

Plastic cups are loved by many people because of their changeable shapes, bright colors and fear of being beaten. They are very suitable for outdoor users and office workers. Generally speaking, there are signs on the bottom of plastic cups, which are the numbers 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℃~ 172℃, and its chemical properties are relatively stable. It is relatively stable to other chemical reagents except for corrosion by concentrated sulfuric acid and concentrated nitric acid.

But the problem of ordinary plastic cups is very common. Plastics belong to polymer chemical materials. When hot water or boiled water is filled in plastic cups, polymers can easily precipitate and dissolve in water, which is harmful to human health after drinking.

Moreover, there are many pores in the internal microstructure of plastic, which contain dirt, and improper cleaning will breed bacteria. Therefore, the choice of plastic cups is very important for the choice of plastic materials, and food-grade plastics that meet national standards must be selected. That is PP material.