Insulation blanket
Heat insulation materials are divided into porous materials, heat reflection materials and vacuum materials.The former USES the pore space that material itself contains to insulate heat, because the air inside interstitial or inert gas conduction coefficient is very low, wait like foamed material, fiber material.Thermal reflective materials, such as gold, silver, nickel, aluminum foil or metallized polyester, polyimide film, etc.Vacuum insulation material is the use of the material's internal vacuum to achieve resistance convection insulation.The aerospace industry has strict requirements on the weight and volume of heat insulation materials, and also requires them to have the properties of sound insulation, vibration reduction and corrosion prevention.Different types of aircraft have different thermal insulation requirements.Aircraft cockpit and cockpit commonly used foam plastic, ultra-fine glass cotton, high silicon oxygen cotton, vacuum insulation cotton to heat insulation.
The heat insulation material used for missile head was phenolic foam in the early stage. With the application of polyurethane foam with good temperature resistance, the single heat insulation material was developed into sandwich structure.The heat insulation method of the missile instrument cabin is to coat the outer skin of the cabin with a layer of foam coating several millimeters thick, which ACTS as an anti-corrosion coating at normal temperature. When the aerodynamic heating reaches above 200°C, it will even foam and play the role of heat insulation.Artificial earth satellite is in high temperature, low temperature alternating environment movement, must use high reflection performance of multi-layer heat insulation material, is generally dozens of layers of aluminum film, aluminum coated polyester film, aluminum polyimide film composition.In addition, the successful development of surface insulation tile solves the heat insulation problem of the space shuttle, and also marks a higher level of heat insulation material development.
Thermal insulation cotton is a new type of thermal insulation material, which is a porous material with nano pore diameter and is mainly used for pipe insulation and equipment insulation, etc. The thermal conductivity of the material is 0.018w /(K·m) at room temperature and up to 0.009w /(K·m) at low temperature.Vacuum adiabatic board is newest adiabatic material, be promoted greatly abroad, be used at home appliance industry more, the thermal conductivity coefficient of this kind of material is extremely low only 0.004. So in heat preservation energy-saving above effect is outstanding.At present, domestic refrigerating containers have completely used this material.
Heat insulation cotton is a kind of soft industrial heat insulation material with strong heat insulation performance.
