Commonly used food plastic security deposit bags are mostly made of polyethylene film, which is non-toxic and can be used to hold food. There is another kind of film made of polyvinyl chloride, which is also non-toxic, but the additives added according to the purpose of the film are often harmful to the human body and have certain toxicity.
Therefore, this kind of film and plastic security deposit bags made of the film are not suitable for holding food.
If you want to distinguish between PVC plastic safety bags and polyethylene plastic safety bags, the following simple method can be used to identify.
1. Polyethylene film (non-toxic)
The film is milky white, translucent (especially obvious when viewed in layers). It feels smoother, as if it is coated with a wax layer. When shaking it hard, the sound is brittle. And it is easy to burn in fire, with yellow flame, and mucus drips when burning, with the smell of candles burning.
2. Polyvinyl chloride film (generally toxic)
If no pigment is added, it is transparent, and the surface is a little sticky. When shaking it vigorously, you will find its sound is low. It is not easy to burn when. It will go out immediately after leaving the fire and the flame will be green.
