In the current life, the more common thermal insulation materials are glass wool, rock wool, rubber and plastic, graphite polystyrene board, extruded polystyrene board, foam polyurethane and so on. The lower the thermal conductivity of the material, the thinner the design thickness is required, the cost may be lower, and the node design is relatively less problematic. The thermal conductivity is larger, the thickness required is larger, the possibility of forming the product is lower. For thermal insulation products with thermal conductivity greater than 0.045W/(m·K), it is almost impossible to be used in buildings with high energy saving requirements.
Rubber insulation material, I believe that we are not unfamiliar, strictly speaking, this kind of insulation material can not be called external insulation material, because it is a kind of flexible insulation material, usually used for heating and ventilation pipes, thermal conductivity 0.034 ~ 0.041W/ (M ·K).
In China, rock wool board belongs to the high water absorption material, in the domestic hot summer and cold winter area, because of the rainfall in the plum rain season, the air humidity is large, will lead to rock wool board insulation system damp and reduce the insulation performance, thermal conductivity 0.040W/ (m·K).
Glass wool boardis glass wool applied thermosetting binder made of a certain stiffness of the board products. So, the bottom has the advantages of good molding, low volume density, thermal conductivity, thermal insulation, sound absorption, corrosion resistance, stable chemical properties, and thermal conductivity 0.042W/ (m·K).
Foaming polyurethane, a single organic insulation material with the best performance on the number of polyurethane insulation material. According to the process, it is divided into on-site foaming polyurethane and factory prefabricated rigid foam polyurethane board, with thermal conductivity of 0.024W/ (m·K).
There is no perfect insulation material in the world. However, it is not necessarily the material itself that affects the final quality of the product. These materials have their own advantages, and other materials do not have. However, no matter how good a product is, it is useless without good manufacturers and workers to do it well. One product two points design seven points construction is the construction industry has been the default quality formation factor.