Polymeric insulating materials used in the form of gas-filled plastic, which the body is divided into three subgroups: 1) cellular or foam plastic (polystyrene), 2) cellular plastics (Poroplasty), 3) cellular plastic (honeycomb plastics). Application of polymeric insulating materials for heat insulation device pipes, tanks, refrigeration units give great technical and economic effect. For device insulation of hot pipes and applying polyurethane foams based on silicones, phenolic and urea-formaldehyde polymers. Widespread in recent years have received such effective high-temperature materials for thermal insulation of pipes and equipment, such as polyethylene foam and rubber. Heat insulation suit of ready-made insulating pipes, segments and the hemispheres, or by pouring and deposition. For the insulation of cold and warm temperate tubes except those used as foams based on polystyrene, polyvinyl chloride and other polymers. Insulated containers operates by spraying or casting, as well as with the films of foam, insulating wrap on the subject to the layer of desired thickness. During the construction of refrigerators foams must be considered one of the most promising for insulation materials.
They are used as blocks and sheets based on different polymers: polystyrene, polyvinyl chloride, urea-formaldehyde, etc. In the application blocks mipory necessary to provide protection from foam moisture. For this block of foam wrap waterproof tape. Especially effective is the application for the construction of refrigerators sandwich panels with a middle layer of foam on the outside of protected weatherproof aluminum foil and steamproof film or paint. Foams used to fill the temperature and expansion joints between the individual structural elements of buildings. Elastic foams are widely used as a sealant for butt joints of the device.