Now when we buy food, whether it is food or food that can be directly eaten, the vast majority of them are to use packaging bags, the packaging materials used are paper bags, plastic bags, paper-plastic composite bags, paper bags and paper-plastic composite bags are environmentally friendly packaging products, safety can be guaranteed, if it is the use of plastic bags, we must be careful.
Now paper bag machine equipment has been very popular, but plastic bags still have a large market, but frequent use will cause a certain amount of pollution to the environment, so we should be moderate. With the continuous promotion of environmental protection policies, people are still paying more attention to the use of plastic bags. The same is the plastic bag, our use of personal injury is not the same, today we introduce to you is about the safety of plastic bags identification methods.
Generally speaking, plastic bags are made of two types of plastic film: one is polyethylene, polypropylene; The other is made of polyvinyl chloride. The former material is non-toxic; The second material is toxic and cannot be used to package food. A film on the market is made of polyvinyl chloride, and polyvinyl chloride itself is non-toxic, but the additives added according to the use of the film are often harmful to the human body and have a certain toxicity. Therefore, films or plastic bags made of polyvinyl chloride should not be used to hold food.

In order to identify whether plastic bags are safe, in fact, the easiest way is to put plastic bags into the water, non-toxic plastic bags into the water, can surface, and toxic plastic bags are not floating up. At the same time, the polyethylene film or plastic bag feels more lubricated, shakes hard, the sound is brittle, and the mucus drips when burning. The PVC film or plastic bag feels its surface is somewhat sticky, the sound is low, the fire is not easy to burn, and the flame is extinguished. Now we have learned how to distinguish the safety of plastic packaging, but in order to reduce our health threats, try to use more environmentally friendly paper bags.