Most of the commonly used food convenience bags are made of polyethylene film, which is non-toxic, so it can be used for filling food. Another kind of film is made of polyvinyl chloride. The polyvinyl chloride itself is also non-toxic Yingkou supermarket bag. However, additives added according to the use of the film are often harmful substances to human body and have certain toxicity. Therefore, this kind of film and convenient bags made of this film should not be used to hold food. If you want to identify PVC and PE convenient bags, you can use the following simple method to identify.
Supermarket bags
Folded polyethylene film (non-toxic)
The film is milky white, translucent (especially when observed on several layers). It feels more lubricated, as if it is coated with wax layer on the surface. It shakes hard, its voice is brittle, it is flammable in case of fire, and the flame is yellow. There are drops of mucus when burning, and the odor when burning candles.
Folding polyvinyl chloride film (general toxicity)
If it is transparent without pigments, it feels slightly sticky on its surface, shakes vigorously, and has a low voice. It is not easy to burn in case of fire. It extinguishes immediately from the flame and the flame is green.
