Polyethylene is classified into various categories based on density and chemical properties. Its mechanical properties depend on its molecular weight, crystal structure and branching type. * HDPE (high density PE) * LDPE (low density PE) Although the features vary according to types; Good resistance to outdoor conditions and moisture, flexibility, weak mechanical strength and superior chemical resistance are the general characteristics. Containers, plastic boxes, kitchen utensils, coatings, pipes and tubes, toys, insulation layers in cables, packaging and packaging film is a very common use. Low cost.