Polyurethane foam
Polyurethane rigid foam is a kind of polymer which is made by high pressure spraying and foamed by special equipment mixed with isocyanate and polyether as the main raw materials under the action of foaming agent, catalyst, flame retardant and other additives. Polyurethane foam has two kinds: soft foam and hard foam. The soft bubble is open pore structure, and the hard bubble is closed pore structure. The soft bubble is divided into skin and not skin two kinds.
The main function of polyurethane foam is cushioning. Polyurethane foam is commonly used for sofa furniture, pillows, cushions, toys, clothing and sound insulation lining.
Polyurethane rigid foam is a new synthetic material with thermal insulation and waterproof functions. Its thermal conductivity is so low that it is only 0.022 ~ 0.033W/ (m* KP), so it is half of the extruded panels and the lowest among all the thermal insulation materials. Rigid polyurethane foam is mainly used in building exterior wall insulation, roof waterproof insulation integration, cold storage insulation, pipe insulation materials, building boards, refrigerated vehicles and cold storage insulation materials.
Foam is one of the main varieties of polyurethane synthetic materials. Its main characteristic is porosity, so its relative density is small.
Higher than strength. According to the different raw materials and formula changes, can be made into soft, semi-rigid and rigid polyurethane foam plastics and other kinds; According to the classification of polyols used can be divided into polyester type, polyether type and castor oil type polyurethane foam plastics; If classified by foaming method and block, molding and spraying polyurethane foam plastic and other types.
Polyurethane foam is widely used, almost infiltrating into all sectors of the national economy, especially in furniture, bedding, transportation, refrigeration, construction, insulation and other departments are very common, has become one of the indispensable materials. Plastic has become one of the most widely used varieties. Polyurethane foam is mainly used in furniture, bedding and his household products, such as sofa and seat, backrest cushion, mattress and pillow; Polyurethane rigid foam is mainly used for thermal insulation, refrigeration equipment and cold storage, thermal insulation plate, wall insulation, pipeline insulation, storage tank insulation, single-component foam joint filling material, etc.
