It is very important to choose good insulation materials when building buildings. Some real cases also strongly confirm the importance of selecting insulation materials. B1 grade extruded board is an emerging insulation material, which is deeply loved by construction companies. When you purchase, you should polish your eyes and choose a genuine B1 extruded board. Shanghai teacher apartment fire, Shenyang dynasty Wanxin Building... A beautiful building turned into black coke, and countless lives were swallowed up by the fire. One of the reasons for the fire is that the flame retardation of the B1 grade extruded board has caused the fire to spread. The "insulated outerwear" of the building's exterior wall is flame-retardant, but because of the "scraping and reducing materials" of the builders, it has become a "stealth incendiary bomb" that is flammable and difficult to save.
B1 grade extruded board is a new type of building material widely used in China in recent years. This kind of new environmentally friendly material that uses waste plastic to turn waste into treasure, because of its excellent high strength, pressure resistance, excellent thermal insulation and light texture It is easy to use, high-quality water-repellent, moisture-proof and environmentally friendly, stable and anti-corrosive, and has become a new building material widely promoted in the construction industry. Widely used for wall and floor insulation.
At present, the extruded board with a thickness of 2-10 cm is generally bonded to the base layer with a special adhesive on the outer wall surface of the building, and the flame retardant glass fiber mesh and the cement adhesive mortar protective layer on the outer side. The outer coat is seamlessly wrapped up to form an external wall insulation system. That is to say, at present, many buildings under construction are insulated and insulated with extruded boards, and a layer of light “insulation coat†is worn from beginning to end.
According to the national standard, the name of the extruded board is called extruded polystyrene foam for thermal insulation. The functions of heat preservation, flame retardant, pressure resistance and environmental protection are the most important functions. The current national standard GB8624 "Classification of Combustion Performance of Building Materials" Regulation: Class B2 is the lowest flame retardant requirement oxygen index ≥26 for the current B1 grade extruded board. According to the requirements of Article 11 of the Fire Protection Law of the People's Republic of China, the fire performance of building components and building materials must meet the requirements of national standards and industry standards. Extrusion plates need to be added with flame retardant in the production process to prevent and delay. Intense burning of polystyrene sheets. The extruded board "sees the fire and burns", which means that the layer of "insulation coat" that is worn throughout the building becomes an extremely dangerous "burning bomb".
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