EPS expanded polystyrene board, polystyrene beads after heating pretest bubble in the mold after heating forming with obturator structure made by polystyrene foamed plastic board.
XPS insulation board is extruded polystyrene insulation board insulation, it is a polystyrene resin as raw materials and other raw materials and inclusion, inject catalyst by cooking at the same time, and then extruded extrusion molding and manufacturing rigid foam plastic board. Its scientific name is adiabatic with extruded polystyrene foam plastics.
Heat preservation performance: eps is 0.041, xps is 0.030
The intensity ：The tensile strength of EPS 18 kg/m3 density is 110 ~ 120 kpa, 20 kg/m3 density of around 140 kpa. The density of XPS is from 25 kg ~ 45 kg, normal strength from 150 kpa to 700 kpa or higher.
The advantages and disadvantages of the two systems:
The advantage of eps board: 1) it has line into a system, mature technology. Because it is in Europe and the United States has been used for nearly 30 years, buildings have been built in the United States is as high as 44 layer. Has formed the technology system, therefore, bonding layer, thermal insulation layer, and can be used on the surface, there are more mature technical documents. 2), heat preservation effect is good. 3), because of using expanded polystyrene insulation materials, its price is not very expensive, price moderate the whole system. Making it easy for users to accept. 4), complex construction technology, construction unit commonly, after a brief training can master the construction main point, facilitate technology promotion.
The advantage of xps board: 1), XPS board has a dense surface and inner closed pore structure. The coefficient of thermal conductivity is much lower than the thickness of the EPS, so has the EPS thermal insulation performance better. Thickness of outer wall of the same building, its use can be less than other types of thermal insulation material. 2), as a result of the inner closed pore structure. So it has good resistance to wet, in the humid environment, still can maintain good performance of heat preservation and heat insulation; Suitable for cold storage, etc have special requirements to heat preservation of building, also can be used for exterior wall facing materials of brick or stone building. XPS system shortcomings: 1), the high strength of XPS board itself, thus caused brittle, not easy to bend, plate on the stress of the existence of stress concentration, easy to make plate damage or cracking. 2), poor permeability, hardly breathe freely, if the temperature difference on both sides of the plate is larger, high moisture condensation easily. 3), the price is higher compared with EPS system. 4), are attempted to use nearly 3 ~ 4 years, domestic, there is no national standard; Thermal insulation technology advanced countries such as Europe and the United States, South Korea, there is no use. 5), the structure of poor scalability, affected by the change of temperature and humidity and deformation, the drum cause insulation layer falls off. After 6), poor glue and adhesive failure surface of XPS board surface, bonding strength is not enough.
Visible, the latter of hydrophobic, heat preservation, moisture proof performance is better than the former, such as prices in general, higher than the former.