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What are the materials of bread bags

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materials are generally PE and PP
compared with non food packaging, it does not contain plastic additives and will not release toxic substances in the process of use. For example, plasticizer, which is more violent in the past, can cause cancer and is used in PVC packaging. The previous plastic wrap was PVC, but now it is gradually replaced by PE plastic wrap because of its insecurity
PE is soft and its mechanical properties are worse than pp. representative products include shopping bags, plastic wrap, garbage bags and so on
PP is hard, anisotropic (it is easy to tear when there is a notch), and has good mechanical properties. Its high temperature performance is better than PE, which represents a bread bag.

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