Material differences of commonly used plastic bags

Our common vest plastic bags are made of two common commercial materials, both of which belong to PE material, but they have different characteristics. The former feels soft, shiny and strong (with toughness). Therefore, this material is often used in handbags and finished bags required for industrial packaging.

The application scope of low-pressure bags is mainly in shopping malls, shopping malls, food industries, etc., such as low-pressure bags used in the kitchen of restaurants, and vest bags sold to consumers in shopping malls are also made of this material. Its appearance is characterized by tensile resistance, occasional tearing, and not easy to deform. The hardness is also strong, and it is not easy to be pierced by blunt objects. Both are made of PE. How to distinguish these two kinds of plastic bags?

A relatively simple identification method introduced by the manufacturer of vest bag is to tear the plastic bag like paper. If there is a white mark on the crack, it proves that it is a low-pressure bag. If there is no white mark, it is a high-pressure bag. If businesses have both low-pressure bags and high-pressure bags in their hands, when doing this experiment, they will obviously feel that there will be greater resistance to the high-pressure bags in Sri Lanka.

PP bags and OPP Bags with high transparency

These two kinds of bags are made of plastic bags with high transparency, so they are often made into packaging bags for clothes and gifts. The difference between the two is that PP bags are hard and smooth. Shaking with your hand will make a big sound. Generally, plastic bags will not leave traces of folding, but PP plastic bags will be like paper creases after folding in half.

OPP Bags have higher transparency, but the big difference is that OPP is more brittle and has no toughness. Because it is relatively brittle, it is easier to be damaged, but this damage is based on the fact that the mouth has burst. Once there is a hole, the customized plastic bag made of this material is easy to tear.