The emergence of vacuum insulation panels has only been around for decades, and this material is derived from vacuum insulation technology. The concept of vacuum insulation panel was first proposed and designed by NASA in the United States. It uses fumed silica as the core material, which has good thermal insulation performance, long service life and good comprehensive performance, but the production process is complicated and the weight is large. In the 1970s, the vacuum insulation panel with open-cell foam as the core material was invented. In the 1990s, products with open-cell polystyrene and polyurethane foam as core materials were developed. So far, it has developed a barrier film composited with multilayer polymer material films; glass fiber, silica, aerogel or microporous polyurethane and other materials are used as the core material; coupled with the new type of adsorption, the formation is relatively mature of modern vacuum insulation panels. At the end of the last century, the domestic research on vacuum insulation panels began, and the research and development of vacuum insulation panels was carried out on the basis of foreign vacuum insulation panels. Due to the short development time, the lack of timely promotion of domestic energy-saving policies, and the high cost, the initial domestic market was Not yet widely used. In recent years, with the tightening of energy conservation and environmental protection policies and the upgrading of terminal consumption, the penetration rate of vacuum insulation panels in the refrigerator freezer and construction industry has continued to increase.
As a new type of high-efficiency thermal insulation material, vacuum insulation panels have obvious performance advantages compared with conventional thermal insulation materials. The thermal conductivity can be ≤0.008w/m·k, which is 1/3~1/5 of the traditional thermal insulation materials, and the fire performance reaches Class A. At first, it was applied to refrigerators, cold storages, refrigerated containers, medical incubators and other fields. Compared with traditional thermal insulation materials, it can save energy by 10% to 30% and increase the effective volume by 20% to 30%. It is also possible to reduce the weight and volume of the refrigeration equipment. At the end of the last century, in a few developed countries, vacuum insulation panels began to be applied in the field of construction. At present, a large number of vacuum insulation panels have been used in building insulation all over the world. For the A-class fireproof vacuum insulation panels used for building exterior walls, on the basis of retaining the original advantages, the fireproof function has been especially improved. It solves the problem of excessive thickness of traditional thermal insulation materials due to the continuous improvement of energy-saving requirements, and also solves the problem of hidden safety hazards in the process of construction and use caused by the failure of traditional thermal insulation materials to meet the requirements. With the gradual decline of the price of vacuum insulation panels and the continuous improvement of cost performance, the advantages of replacing traditional materials have become very obvious, so the potential of vacuum insulation panels to replace traditional thermal insulation materials is great, and the development prospects are extremely bright.
