Polyethylene (PE) are lightweight in the thin plate.It can be folded and bent. if it is more thickness, stable of PE can support less tensile and compression strength. On the other hand, it can stretch highest 500 percentage, tear hard, waxy appearance, not athering water and good insulator. Nomally, polyethylene are clear but when a thin plate is opaque color. In other word, when we add thickness we can compound to the other color which we need. The product of PE that popular are food bags, clothes, baby dolls, flower plastic, food container in the kitchen, Ice tray in the refrigerator, bottle,liquid container, plastic cover the greenhouse, cable, moisture pad in the building and cheap appliance.