Since the snow disaster in 2008, the industrial manufacturing and construction industries have developed rapidly. China, known as the "infrastructure maniacal", has made rapid progress in all aspects and is riding high all the way. Whether it is railway or construction, the landscape of the city is changing with each passing day, high-rise buildings are mushrooming out, and the speed of infrastructure is accompanied by the improvement of many systems and standards. For example, in recent years, due to the frequent occurrence of large-scale fires, the system and standards of fire prevention have also been improved.
In China, exterior wall insulation materials are judged according to the NATIONAL standard GB8624-2012 "Building Materials Combustion Classification". It is mainly divided into four grades: A, B1, B2 and B3. Class B1: inflammable insulation material; B2: combustible insulation material (see EPS expansion polystyrene foam insulation board and XPS extruded board, that is, we often say the general board, the material has a low ignition point, and will release a lot of harmful gases in the combustion process); Class B3: flammable insulation material (this kind of insulation material is mainly polystyrene foam material, because this material is very easy to burn, has been eliminated external wall insulation material).
And now the heat preservation and energy saving new materials used more widely is glass wool and rock wool. Both of them have A1 class incombustible performance, not only the leader of sound insulation and sound absorption, but also the leader in the direction of fire insulation. In GB51251, in addition to rock wool, uetersen glass woolalso meets the fire resistance and heat insulation requirements of smoke control and exhaust system. A1 level of glass wool is to use raw material is quartz type in 1350 ℃ furnace melting into a glass of water, after the centrifuge dumped into a uniform thin glass fiber, with the scientific formula management and control, especially his glass cotton overall performance is superior, greatly reduces the made in the production, packing and shipping, install and use the loss of each part.
Uetersen GRADE A1 glass wool belongs to non-combustible fireproof material, in case of open fire is carbonized, non-combustible from the fire, no fire up and down, with excellent insulation and sound absorption, high hydrophobicity. Therefore, it is widely used in construction, industry, metallurgy and other fields.