In addition to convenience foods, the most common plastic packaging in our daily life is plastic bags, but plastic bags also have "three-six-ninth, etc.": common food packaging materials are chemically named polyethylene (PE) or polypropylene; Polyvinyl chloride (PVC), which is commonly used in raincoats, tablecloths, slippers, agricultural films, etc., is added with more plasticizers, stabilizers and other auxiliary materials. If used to store plastic bags for direct food imports, it may be Harm to the health of the human body. As an ordinary consumer, what method do we use to identify whether the raw material of the plastic bag is PE or PVC?

      The first is visual inspection. The plastic bag of PE is generally milky white and translucent. It touches the surface of the plastic bag. The feel of PE is lubricated and the texture is firm and tough. The sticky hair is made of PVC plastic bag. Secondly, the plastic can be shaken by hand. The bag is made of PE with a crisp sound, while the sound is small and stuffy is PVC. If conditions permit, it can also be identified by burning. The flame is blue, the upper end is yellow, and the smell of paraffin is PE when burning. It is extremely difficult to burn, the flame is yellow, the upper end is green, and the odor of hydrochloric acid is emitted. For PVC.