Barter is the present and the future of international trade, especially for people who is starting in the import export business. Barter and more: Triangular operations.
Characteristics of plastic bags
Commonly used food plastic bags are mostly made of polyethylene film, which is non-toxic, so it can be used to hold food. There is also a film made of polyvinyl chloride, which itself is non-toxic, but the additives added according to the use of the film are often harmful substances and have certain toxicity. Therefore, such films and plastic bags made of the films are not suitable for containing food. To identify polyvinyl chloride plastic bags and polyethylene plastic bags, the following simple method can be used for identification.
Polyethylene film (non-toxic)
The film is milky white and translucent (it is especially obvious when several layers are stacked), and it feels smooth to the touch, as if there is a wax layer on the surface, shaking with force, the sound is brittle, flammable in case of fire, the flame is yellow, and there is sticky dripping when burning , and the smell of burning candles.
PVC film (generally toxic)
White pollution
White pollution
If no pigment is added, it is transparent, the surface is sticky to the touch, shakes vigorously, the sound is low, and it is not easy to burn in case of fire.
