There is a rumor said that coffee cup will release the carcinogenic benzene compounds, Food and Drug Administration today said that if the coffee cup is toxic, depend on the type of plastic and the amount of dissolution. Polystyrene (PS), which is commonly used in coffee cups, is not suitable for food containing more than 100℃. In recent years, the market often use Polypropylene as coffee cups which the temperature is up to 167℃.
Polystyrene (PS) is a colorless and transparent thermoplastic, often used to make foam products, and can be copolymerized with other rubber types of polymer materials to produce a variety of different mechanical properties of the product. Polystyrene is often used to make disposable plastic cutlery (such as: instant noodles bowl, drink cup), and expanded polystyrene is widely used as insulation material. Although the large usage of polystyrene, the polystyrene are disposable, which can easily become the white pollution, so eps recycling is very necessary to protect our environment.
However, when polystyrene heated to 70℃, it will be easy to release the styrene monomer, and when styrene monomer in the case of high concentrations, it may have an bad impact on human liver, kidney, and nervous system.
In contrast, polypropylene (PP) can resist high temperature, acid and alkali, chemical, collision, which is widely used in packaging materials and textiles. In addition, the polypropylene can be recycled to produce trash, flower pots, electrical shell, plastic chair handle and pulley and other plastic products.
In order to facilitate the classification of recycling, EPD plastic container material marked as 7 categories, of which No. 5 is polypropylene, No. 6 is polystyrene, people can pay attention to the cup before drinking.