China Drying News "I think that the field of exterior wall thermal insulation will become the fastest-growing downstream market for polyurethane in the next few years. The market share of polyurethane in building energy-saving is expected to reach 50%." Talking about the development of polyurethane in building energy-saving and Application, Li Jianbo, deputy secretary-general of the China Polyurethane Industry Association, appeared confident. At present, in some northern cities, renovation of old buildings such as external wall insulation is underway.
It is understood that building energy consumption accounts for about 30% of the total social energy consumption, and it is an area with huge potential for energy conservation in the future. With the deepening of energy-saving and emission-reduction work in China, energy-saving work in the construction field has gradually been pushed forward. In May this year, the Ministry of Housing and Urban-Rural Development specially formulated the “12th Five-Year Plan for Building Energy Efficiencyâ€, which made systematic deployment of building energy-saving.
One of the main tasks of building energy conservation is to increase the external wall insulation level of buildings, implement mandatory energy-saving standards for new buildings, and carry out energy-saving transformation of existing buildings, thereby increasing the energy efficiency of buildings.
During the "Twelfth Five-Year Plan" period, the total newly-built construction area in urban areas in China will reach 4 to 5 billion square meters. According to the "Special Plan", these newly-built buildings will form 45 million tons of standard coal energy-saving capacity by the end of the "Twelfth Five-Year Plan." At the same time, the existing building stock in China is huge. Most of the buildings built before 2000 are non-energy-saving buildings. The average insulation level of the external walls of civil buildings is only 1/3 of the developed countries with the same latitude in Europe. It is estimated that more than 2 billion square meters of existing buildings in the northern region are required to carry out energy-saving reforms. The "Special Plan" proposes that, through energy-saving transformation, the existing buildings in northern heating areas and the national public buildings should form the energy-saving capacity of 27 million tons of standard coal and 14 million tons of standard coal, respectively.
“Whether it is a new building or an existing one, a large number of exterior wall insulation needs will create a huge market for exterior wall thermal insulation materials. Among the current major external wall thermal insulation materials, polyurethane has obvious Advantage," Li Jianbo said.
According to Li Jianbo, common insulation materials include rock wool, glass wool and other inorganic materials, and organic materials such as phenolic resins, rigid polyurethanes, expandable polystyrene (EPS), and extruded polystyrene (XPS). Rock wool has the best fireproof performance but the worst thermal insulation performance, and the price is slightly higher. EPS and XPS insulation performance is slightly better than rock wool, but fire performance is the worst and prices are the lowest. Polyurethane insulation performance is the best, fire performance and price are in the middle Phenolic resin is the highest price.
It is understood that the current EPS and XPS is the mainstream product of China's building external wall insulation, both accounts for about 70% of the total market. In the face of established constraints on building energy conservation, insulation performance will replace cost and become a priority for builders when selecting materials. Li Jianbo believes that there are many high-rise buildings and high density in China, and the firefighting capacity, emergency rescue, and medical care are insufficient. The challenges of building thermal insulation and fire prevention are higher than those in foreign countries. Therefore, whether EPS and XPS should be the mainstream of China's external thermal insulation materials is worth discussing. .
Li Jianbo told reporters that through the inspection of the European building external wall insulation market, the European fire protection requirements have paid more attention to the fire safety of the final system, but China currently only pays attention to the material's combustion performance level, which is not enough to deal with the fire risk of the external wall insulation system. .
"Since 2006, the China Polyurethane Industry Association cooperated with the Chinese Academy of Building Research, the Tianjin Fire Research Institute of the Ministry of Public Security, and the Sichuan Fire Research Institute of the Ministry of Public Security to conduct a model fire experiment on a polyurethane rigid foam exterior insulation system. In the system fire safety experiment In the same category as B1, the performance of polyurethane is much better than that of EPS. EPS insulation wall fires after 10 minutes of combustion and must be forced to extinguish the fire.†Li Jianbo said that through a lot of research and practice, consensus has been formed in the industry. Polyurethane hard foam and other thermosetting insulation materials are superior to EPS, XPS and other thermoplastic insulation materials in fire performance.
It is understood that on December 3 this year, the Ministry of Public Security cancelled the 65th document that was issued on March 14 last year. This document was issued in the wake of several relatively influential fire incidents in the society. The Ministry of Public Security issued an emergency policy, which imposed mandatory requirements on the use and management of exterior wall thermal insulation materials, and stipulated that the civil building exterior insulation materials should use combustion performance. Grade A material, otherwise it will not pass the acceptance. Li Jianbo said that the cancellation of the No. 65 document is the loosening of organic insulation materials. At the same time, the forthcoming "Code for the Fire Protection of Architectural Designs" will require more stringent energy-saving standards than the provisional requirements. In addition to focusing on the burning performance of materials, the safety of insulation systems will also be concerned. This series of policies will be conducive to the promotion of polyurethane rigid foam in the field of building insulation materials in China.
Data from the Polyurethane Industry Association shows that in 2006, the insulation area of ​​polyurethane buildings was approximately 1 million square meters, and in 2011 it had reached 35 million square meters. Among them, under the influence of the 65 fire prevention policy in 2011, there is still a 17% increase. At present, polyurethane accounts for 10% of the entire building insulation material market share.
Li Jianbo said that the China Polyurethane Industry Association is vigorously promoting the introduction of "Code for the Fire Protection of Architectural Design" and the preparation of polyurethane building insulation standards. In the next 3 to 5 years, polyurethane's market share in the field of building energy conservation is expected to increase from the current 10% to 50%.
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