Teach you to identify the raw materials of plastic bags

The common chemical names of food packaging bag materials are polyethylene (PE) or polypropylene, etc.; while polyvinyl chloride (pvc), which is commonly used in raincoats, tablecloths, slippers, agricultural films and other products, is due to the addition of more plasticizers, Auxiliary materials such as stabilizers may be harmful to human health if used in plastic bags for directly eating food. So, plastic bags can be said to be the most contacted in our daily life, so what method do we use to identify whether the raw material of plastic bags is PE or PVC? On the surface of the plastic bag, PE has a smooth feel and has a hard and tough texture. The sticky and astringent ones are PVC plastic bags; secondly, you can shake the plastic bags with your hands, and the ones that make a crisp sound are PE, and those that make a small and dull sound are 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; it is extremely difficult to burn, the flame is yellow, the upper end is green, and the pungent smell of hydrochloric acid is emitted. for PVC.
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