Explanation

plastics with numerous micropores in the white part made of resin. It is a two-phase system with resin as continuous phase and gas as dispersed phase. According to its structure, it can be divided into open cell foamed plastics with interconnected pores; Closed cell foamed plastics with separated pores: reticulated foamed plastics with almost all pore walls removed. According to its hardness, it can be divided into soft, semi hard and hard foamed plastics. It can also be divided into thermosetting foamed plastics and thermoplastic foamed plastics according to the type of plastics. The foaming methods of foamed plastics include mechanical foaming, physical foaming and chemical foaming. molding methods can be divided into extrusion, molding, injection molding, casting, etc. The base material of foamed plastics. Common products include polyurethane foam, polystyrene foamed plastics, polyethylene foamed plastics, polyvinyl chloride foamed plastics, phenolic foamed plastics, urea-formaldehyde foam, epoxy foamed plastics, etc. foamed plastics contains pores. It has low density and heat insulation. Advantages such as sound absorption and shock resistance. It can be used as thermal insulation acoustic insulation materials and lightweight high-strength sandwich materials. In the chemical industry, it is used as a thermal insulation materials for pipes and containers. Architecture; Building materials used for roofs and walls in industry. It can also be used as aircraft accessories, ship casings, rescue circles, floats, warm clothing, etc.

Classification