When choosing the manufacturers of customized plastic bags, we must find reliable ones and require the production of new raw materials, because poor quality plastic bags are quite harmful. As we all know, plastic bags are made of chemical substances, such as Yingkou supermarket bags. In order to reduce the production cost, many processing workshops add recycled materials. The production of such plastic bags is definitely unqualified. Of course, we don't want to be indiscriminate. According to the different materials used, we can distinguish the materials of the two kinds of plastic bags.

For example, we usually see a lot of plastic bags used to package food, because its component material is polyethylene film, which is non-toxic. The disadvantage of this material is that the strength is not enough, the sealing is not enough, and it can't bear high temperature, so it can't be used to package tea, spices and other items.

But there is another kind called PVC, which is not the same thing at all. Although PVC is not toxic, people usually add additives in its use, which do great harm to human body. This kind of plastic bag can not be used to package food. It is usually used to make raincoats, soles and handbags. So how to clearly distinguish the two materials?

In fact, the method is very simple, the first is the surface characteristics, polyethylene surface is milky white, feel very smooth, in shaking, the sound is relatively crisp. Then, when burning, polyethylene is flammable, with yellow color and mucus dripping. The burning smell is very similar to that of a candle.

If PVC bags are not doped with pigment, they are relatively transparent. They feel different from polyethylene. Some of them are sticky, and they are not crisp when shaking. They are a little low, and they are not easy to burn. If they leave the flame, they will go out. The color of the flame is green, which is obviously different from polyethylene.

If you need to customize plastic bags, choose the right materials according to the actual situation. For ordinary use, as long as we pay attention to observe and master the quality of plastic bags, qualified plastic bags are related to our healthy life.