Building energy-saving technology has become one of the important directions in the development of building technology in the world today. China has listed building energy conservation as a macro-development plan. Foreign countries generally attach importance to the application of exterior wall materials in buildings. The requirements ensure the quality of the construction.
According to the national energy conservation and emission reduction guidelines and policies, if the current demand for building insulation market in China is analyzed, the annual demand will reach at least several million tons, which is several times the current production in China. The data shows that in 2010 China’s building energy efficiency rate basically achieved the goal of 50%, but in addition to a few large and medium-sized cities, the building energy efficiency rate can reach the standard, the majority of small and medium-sized cities and rural areas have a large gap, the market growth space is relatively broad.
Safety and environmental protection exterior wall insulation materials are the key materials for building disaster prevention and mitigation, energy conservation and consumption reduction. With the general improvement in building safety and fire protection, the demand for this material in the construction industry has grown rapidly. Since 2011, the supply of safe and environmentally-friendly exterior insulation materials has been in short supply, and various regions have expanded their production capacity.
In China, building energy consumption will account for more than 36% of the total energy consumption of the whole society. It is necessary to carry out research and application promotion of new building energy-saving materials, new technologies and new products. In buildings, heat loss is mainly dissipated through doors and windows and walls. Of course, the wall occupies a considerable share of heat dissipation. Improve the thermal performance of the envelope structure, so that the heat energy can be effectively utilized inside the building, and will not be lost quickly. Therefore, the development of external wall insulation technology and the promotion of energy-saving materials are the necessary ways to achieve energy-saving construction.
The requirements for building materials are becoming increasingly strict. The traditional organic thermal insulation building materials will be thinner and the demand for new building materials will reach at least several million tons per year. For the current production of China, several times, the production enterprises will gain new development opportunities.
Promoting the use of external thermal insulation is one of the effective ways to reduce energy consumption in China. At present, the energy loss of housing in China is roughly 50% of the wall; the roof is about 10%; the doors and windows account for about 25%; the basement and the ground account for about 15%. Therefore, the insulation of walls and roofs is an important part of improving the energy efficiency of buildings. How to choose a wall insulation building material that is safe and environmentally friendly is the key to today’s industry and decides the sound development of China’s building energy-saving insulation building materials industry.
The so-called A-class, that is, non-combustible materials, but currently the popular building insulation materials in the market in China are mainly organic materials, even if the flame retardant is added, the highest can only reach the B1 level. If we strictly enforce the most stringent fire protection order in history, it means that China’s thermal insulation materials industry will face a situation of reshuffle or even elimination.
The external wall insulation materials are mainly divided into organic and inorganic. Nowadays, the organic outer wall mainly composed of polystyrene bubble board, extruded polystyrene foam board and polyurethane rigid foam is widely used in China. Insulation Materials. Polyurethane foaming material is a kind of polymer thermosetting thermal insulation material with thermal conductivity of 0.024W/(m·K). It is the best among all external wall organic insulation materials. Polyurethane foam is highly flammable material. , to be flame retardant before use.