The most commonly used insulation materials for building insulation in China

At present, the most commonly used building insulation heat preservation and heat insulation material for polystyrene board, including the extruded polystyrene board and board, accounts for about 80%, this materials advantage is relative to the lowest price, but all aspects of performance is relatively poor, especially in terms of fire prevention performance is extremely outstanding, polystyrene belongs to flammable and combustion to produce a large amount of poisonous gas material, in recent years, causing a vicious fire, especially large public buildings such as CCTV new site, nanjing central square fire caused great damage to the society. The advantage of polystyrene board is price is opposite lowest, but because the performance of each respect cannot obtain safeguard.

Therefore, in Europe and the United States and other developed countries, this material is almost not used for building energy conservation and heat preservation, while the share of PU materials with better performance is as high as 49%. In Japan and South Korea, building heat preservation is mainly made of PU materials. Compared with polystyrene sheet, PU material has obvious performance advantages in all aspects.

The thermal conductivity of EPS and XPS is 0.041 and 0.030 respectively. PU materials have excellent mechanical properties and can withstand various loads such as wind, dead weight and impact in a wide range of temperature and at a higher temperature. With excellent waterproof, steam insulation performance; In terms of fireproof performance, PU material is a cross-linked thermosetting material with the characteristics of self-extinguishing carbonization from the fire. This carbonization layer can effectively prevent fire. From the perspective of environmental protection, PU foaming agent can be used without fluorine and semi-fluorine foam, and most of the polystyrene board using freon foam, will cause atmospheric pollution