Thermal insulation material (also known as thermal insulation material) refers to the material or material complex with significant resistance to heat flow

International development trend

Nowadays, the global thermal insulation materials are developing towards the direction of high efficiency, energy saving, thin layer, heat insulation, waterproof and external protection integration. In the development of new thermal insulation materials and structural thermal insulation and energy saving technology, more emphasis is put on the targeted use of thermal insulation materials, design and construction according to standards and specifications, and efforts are made to improve the thermal insulation efficiency and reduce costs. In recent years, research on thin-layer thermal insulation coating has been carried out at home and abroad. Many companies in the United States have produced this kind of thermal insulation ceramic coating, such as SPM thermo shield, ceramic cover from thermal protective systems and thermal cover from j.h.international.

Domestic development trend

There is an upsurge in the research and development of new heat insulation materials in China, and Beijing Zhisheng Weihua Technology Development Co., Ltd. has taken the lead in developing a new space reflective heat insulation coating with high efficiency, thin layer, heat insulation and energy saving, decoration and waterproof. The coating is made of silicone acrylic emulsion and water-borne fluorocarbon emulsion with excellent heat resistance, weatherability, corrosion resistance and water repellent properties. It is made up of hollow ceramic particles, which are known as the materials of space age. The coating is made of hollow ceramsite. It is highly reflective to the 400~1800nm range of visible and near-infrared solar heat. At the same time, the air microporous layer with very low thermal conductivity is introduced into the film to isolate the heat transfer. In this way, by strengthening the significant impedance of reflected solar heat and convective heat transfer, the radiation heat transfer and convective heat transfer can be effectively reduced, so as to reduce the heat balance temperature of the object surface. The maximum roof temperature can be reduced by 20 ℃, and the indoor temperature can be reduced by 5 ~ 10 ℃. The thermal insulation grade of the product reaches r-33.3, the thermal reflectance is 89%, and the thermal conductivity is 0.030w/m.k. Development trend: building thermal insulation is an important aspect of saving energy, improving living environment and using function. The proportion of building energy consumption in human energy consumption is generally 30-40%, most of which is heating and air conditioning energy consumption, so building energy saving is of great significance. Moreover, because the heat insulation coating uses water as the diluting medium and does not contain volatile organic solvents, it is not harmful to human body and environment; Its production cost is only about 1 / 5 of the same kind of foreign products. As a new type of heat insulation coating, it has the advantages of good economic benefits, energy saving and environmental protection, heat insulation effect and simple construction, so it is more and more concerned and favored by people. And this kind of space thermal insulation reflective coating is undergoing a change from industrial thermal insulation to building thermal insulation, from thick layer to thin layer, which is also one of the main development directions of thermal insulation materials in the future. The space reflective insulation coating builds an effective thermal barrier by using the vacuum cavity layer formed by the ceramic spherical hollow material in the coating. It not only has high thermal resistance, low thermal conductivity, but also has high thermal reflectance, which reduces the absorption of solar radiation heat by buildings, and reduces the temperature of the covered surface and internal space, Therefore, it is recognized by experts as one of the most promising energy-saving materials.