Recently, it is said that the development of the polyurethane XPS sheet industry is promising, is it true?Recently, it is said that the development of the polyurethane XPS sheet industry is promising, is it true?
Polyurethane is the best contemporary energy-saving insulation material. Because of its long service life, good insulation effect, strong temperature resistance and energy saving and environmental protection, it is widely used in the field of building insulation and building fire protection, and occupies a considerable share in the building insulation material market. . However, there is now an embarrassing problem, which is that the cost price is higher than that of polystyrene board, which is also a thermal insulation material. In terms of B1 insulation materials, polyurethane insulation materials are 1,800 yuan/square meter, while XPS is 650 yuan/square meter, and EPS is 550 yuan/square meter. Coupled with the vicious competition in and out of the industry, the market share of polyurethane in China's thermal insulation materials is less than 10%. At present, my country's thermal insulation materials market is dominated by foamed EPS and XPS. Most product manufacturers increase the fire resistance of thermal insulation materials by adding flame retardants to raw materials. Among them, the main raw material for the production of the above insulation materials is HBCD, a commonly used flame retardant in the fields of insulation, textile and electronics. But in May 2013, the United Nations' Stockholm Convention on Persistent Organic Pollutants voted unanimously to pass a ban: the global ban on the production and use of HBCD. Hexabromocyclododecane is an alicyclic additive flame retardant with high bromine content. It is currently mainly used in EPS expanded polystyrene, polypropylene, epoxy resin, silicone resin and other styrene resins. But at the same time, they can also exist in the environment for a long time and accumulate in biological tissues, which may have an impact on human health. Qian Lijun, deputy secretary-general of the China Flame Retardant Society and associate professor of Beijing Technology and Business University, said that HBCD is a new type of persistent organic pollutant and an invisible killer in thermal insulation materials for exterior walls. It has carcinogenic and teratogenic effects. In the view of many experts attending the meeting, polyurethane not only has good heat insulation, flame retardant, sound insulation functions, but also has green, environmental protection, energy saving and other functions, and is the best substitute for harmful insulation materials on the market. Especially after the policy loosened the organic insulation materials, the development of polyurethane has entered a rapid stage. After the Shanghai fire in 2010, on March 4, 2011, the Ministry of Public Security issued the "Notice on Further Clarifying the Relevant Requirements for the Fire Supervision and Management of External Thermal Insulation Materials for Civil Buildings", which stipulates that the external thermal insulation materials for civil buildings use materials with a Class A burning performance . Professor Yang Zongkun, the former director of China Polyurethane Research Institute, pointed out that the organic materials in building insulation products can't reach grade A, while the polyurethane as organic materials can't be compounded and can reach grade B1 at most. This means that under the "No. 65", polyurethane building insulation materials cannot be put on the wall. Since organic thermal insulation materials occupy 90% of the market share, if strictly implemented in accordance with the "No. 65", almost no materials can meet the requirements. Therefore, on December 3, 2012, the Ministry of Public Security revoked the "No. 65" as an organic The insulation material is loosely tied. Tu Fengxiang, a professor-level senior engineer at the Beijing Academy of Building Research, pointed out that the comprehensive advantages of polyurethane are relatively obvious, such as thinner and better thermal insulation effect, so the polyurethane industry has broad prospects. In the development plan formulated by China Polyurethane Industry Association, the application rate of polyurethane materials will reach about 50% of thermal insulation materials in five years. "But currently China's market share is less than 10%, and the share of polyurethane in foreign insulation materials market is very large, 57% in the United States and 32% in Japan." At the China Green Energy Conservation Forum in East China, Yang Zongkun polyurethane The analysis of the members of the high-tech new material R&D expert team.