Brief Introduction of Polyurethane Foam
Polyurethane foam is a high-molecular polymer made by isocyanate and polyether as the main raw materials, mixed with special equipment under the action of foaming agent, catalyst, flame retardant and other additives, and foamed on site by high-pressure spraying. . Polyurethane foam has two kinds of soft foam and hard foam. The soft bubble is an open-cell structure, and the hard bubble is a closed-cell structure; the soft bubble is divided into two types: crust and non-crust.
The main function of soft polyurethane foam is cushioning. Polyurethane soft foam is commonly used in sofa furniture, pillows, cushions, toys, clothing and sound insulation lining.
Polyurethane hard foam is a new type of synthetic material with thermal insulation and waterproof function. Its thermal conductivity is low, only 0.022 ～ 0.033W / (m * Κ), which is equivalent to half of the extruded plastic board. It is the lowest thermal conductivity among all thermal insulation materials. of. Rigid polyurethane foam is mainly used for insulation of external walls of buildings, integration of roofing waterproof and thermal insulation, thermal insulation of cold storage, pipeline thermal insulation materials, building boards, refrigerated trucks and thermal insulation materials of cold storage, etc.
