Compared with non-food packaging, it does not contain plastic additives and will not release toxic substances during use. For example, the fierce plasticizer in front will cause cancer and is used for PVC packaging. In the past, plastic wrap was made of PVC, but now it is gradually being replaced by PE plastic wrap because it is unsafe.

The softness and mechanical properties of PE are worse than those of PP, and the representative products are shopping bags, plastic wrap and garbage bags in general supermarkets.

PP is hard, anisotropic (it is easy to tear when there is a gap), with good mechanical properties and better high-temperature performance than PE, representing bread bag.