What are EPP, EPE, EPS, and EPO respectively?

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EPE refers to expanded polyethylene, commonly known as pearl cotton. It is a new type of packaging material, consisting of countless independent bubbles created through the physical foaming of low-density polyethylene. EPE can be extruded or foamed into various shapes, such as plates, sheets, or tubes. It can then be stamped, cut, and bonded into various forms. It possesses excellent toughness, resistance to breaking, and superior cushioning properties.

EPP refers to expanded polypropylene foam material, which is a highly crystalline polymeric material with superior performance. Its exceptional properties have made it a rapidly growing new type of compressive cushioning and thermal insulation material. EPP products possess outstanding shock absorption and energy absorption capabilities, high recovery rate after deformation, excellent heat resistance, chemical resistance, oil resistance, and thermal insulation. Additionally, its lightweight nature significantly reduces the weight of items.

EPS refers to polystyrene that is produced through processes such as pre-expansion, maturing, molding, drying, and cutting. It can be manufactured into foam plastic products of various densities and shapes, as well as foam boards of different thicknesses. EPS is widely used in various fields such as construction, thermal insulation, packaging, refrigeration, daily necessities, and industrial casting. 

EPO is a mixture of expanded polystyrene and polyethylene, which is a special type of "copolymer" produced through a unique polymerization process. Its composition and structure are distinctive, consisting of 30% polyethylene and 70% polystyrene.