The different strength between XPS board and EPS board

Here the strength should be pointed out that the tensile strength, polystyrene board bulk density and tensile strength have an absolute relationship, the general EPS capacity of 18Kg / m3 tensile strength is 110 ~ 120KPa, 20Kg / m3 bulk density is about 140KPa. XPS bulk density from 25Kg ~ 45Kg, the intensity from 150KPa ~ 700KPa or higher. (Provided that the thermal conductivity is about 0.03).

XPS board strength in the 200KPa-250KPa, the majority of domestic manufacturers XPS plate in the basic 100 ~ 200kpa, EPS sheet in the 100KPa below, in the increasingly rich facade decoration and coastal areas often have the case of typhoon, the intensity appears very Important, especially for some external wall tiles or high-level, the two kinds of plates are required to reinforce or use fixed parts fixed. Tiles can be drawn more than 400KPa, even if the XPS can not afford to solve the method is to expand the steel mesh through the expansion bolt to the grass-roots level solution, so that the three-dimensional space can be distributed tensile stress, so as long as the anchor properly, steel mesh crack layer is not a big problem.

Compared with EPS, XPS board strength is higher because the xps raw material is polystyrene resin, but compared with XPS due to the nature of EPS sheet (brittle), in the paste area is large, the outer wall of the possibility of cracking, especially the coating surface layer. Flexibility is the problem of wood, take the surface, the sensory knowledge will usually wipe the surface of the polished polystyrene board, and then see the degree of polystyrene board bending to the extent of no cracks, good flexibility, then a few circles are bent Not cracked. Similar to the ductility index in waterproof materials. But the material itself, the flexibility of EPS is better than XPS.