What is bakelite?
Thermal insulation material, a material that can block the transfer of heat flow, is also called thermal insulation material. Traditional thermal Insulation Materials, such as glass fiber, asbestos, rock wool, silicate, etc., new thermal insulation materials, such as aerogel felt, vacuum panels, etc.
Introduction Thermal insulation materials are divided into three categories: porous materials, heat-reflective materials and vacuum materials. The former uses the pores contained in the material itself to insulate, because the air or inert gas in the pores has a very low thermal conductivity, such as foam materials, fiber materials, etc.; heat reflective materials have a high reflection coefficient and can reflect heat, such as Gold, silver, nickel, aluminum foil or metal-plated polyester, Polyimide film, etc. Vacuum insulation material uses the internal vacuum of the material to block convection to insulate it. The aerospace industry has strict requirements on the weight and volume of the thermal insulation materials used, and often requires it to have the properties of sound insulation, vibration reduction, and corrosion resistance. Various aircraft have different requirements for thermal insulation materials. In aircraft cockpits and cockpits, foam plastics, ultra-fine glass wool, high silica wool, and vacuum insulation panels are commonly used for heat insulation. In the early days, the thermal insulation material used for the missile head was phenolic foam. With the application of polyurethane foam with good temperature resistance, a single thermal insulation material was developed into a sandwich structure. The heat insulation method of the missile instrument cabin is to coat a layer of several millimeters thick foaming paint on the outer skin of the cabin, which is used as an anti-corrosion coating at room temperature. When the pneumatic heating reaches 200°C or more, it will evenly foam. Insulation effect. The artificial earth satellite is moving in a high-temperature and low-temperature alternating environment, and it must use high-reflective multilayer heat insulation materials, generally composed of dozens of layers of aluminized film, aluminized polyester film, and aluminized polyimide film composition. In addition, the development of surface insulation tiles successfully solved the problem of heat insulation of the space shuttle, and also marked a higher level of development of insulation materials. Aerogel felt is a new type of thermal insulation material. It is a porous material with nanometer pore size. It is mostly used for pipeline insulation and equipment insulation. The thermal conductivity of this material is 0.018W/(K·m) at room temperature and can reach 0.009 at low temperatures. W/(K·m). Vacuum heat insulation board is the latest heat insulation material, which is widely promoted abroad and is mostly used in the home appliance industry. The thermal conductivity of this material is extremely low, only 0.004. So it has an outstanding effect on heat preservation and energy saving. At present, domestic refrigerators and refrigerated containers have completely used this material Naji thermal insulation soft felt is a kind of soft industrial thermal insulation material with strong thermal insulation performance.
