What is PE laminated paper made of?

PE actually refers to plastic particles, laminated paper is the plastic particles coated on the surface of the paper through the flow casting machine composite materials, the main feature is that this composite material can be oil-proof, waterproof (relative), can be heat-sealed. Different uses take their different characteristics: when used for packaging burgers, take its oil-proof characteristics. McDonald's is 80 degrees of edible vegetable oil for 10 minutes without oil leakage. When used for copper plate paper order packaging, take its waterproof characteristics. When used for automatic packaging machine packaging, take the characteristics of its can be heat-sealed.