Distinguish between toxic and nontoxic plastic bags?

In our daily life, the use of plastic bags is very broad, however, you may not know, actually also toxic and nontoxic plastic bags. So how to distinguish between toxic and nontoxic plastic bags? Here are introduced by small make up for you: there are two main types of plastic bags: one kind is non-toxic, they are with polyethylene, polypropylene and melamine and other ingredients, can be used to pack food. Another kind is poisonous, they are made of vinyl chloride, this can only be ordinary packaging is applied, such as packing in the food there is risk of poisoning. Still have a kind of PVC film, PVC itself is not poisonous, but according to film for the use of additives are often harmful substances to human body, has a certain toxicity. So this kind of film and made of the thin film bag should not be used for holding food. Toxic and nontoxic plastic bags to distinguish method: 1, put the bag in the water, with the hand to press it to the bottom, just a moment, the surface is non-toxic plastic bags, sink in the bottom is the toxic plastic bags. 2, with the hand touch bags appearance, very lubrication is not toxic. If the colors mixed meng, touch the sticky, hair acerbity, is poisonous. 3, forcibly with the hand trembling plastic bags, rushing lala very loud sound is non-toxic plastic bags, and a fullness sound or no sound, plastic bags, are poisonous. 4, smell smell: there is comfort and makes people sick and other abnormal breath are toxic, or can is excessive, plasticizer and other additives and poor quality. 5, when the fire inflammable, yellow flame, you have mucus dripping out, and the breath of out when the candle is for non-toxic; Meet is not easy to put out fire, the flame is quenched, flame greenish is toxic.