A fire exterior polyurethane board Advisory: 18240214099 
 A low thermal conductivity of rigid polyurethane thermal performance. 35 ~ 40kg/m3 rigid polyurethane density, thermal conductivity of only 0.018 ~ 0.024w / (m.k), equivalent to approximately half of the EPS, which is the lowest thermal conductivity of all insulation materials. 
 2, rigid polyurethane moisture-proof, waterproof performance. Rigid polyurethane closed-cell rate in more than 90% of a hydrophobic material, will not increase the thermal conductivity due to moisture absorption, the walls are also not the seepage. 
 3, the rigid polyurethane fire retardant, high temperature. Polyurethane additive flame retardant, a flame retardant self extinguishing material, and its softening point above 250 degrees Celsius, only to appear at higher temperatures, decomposition: In addition, polyurethane foam when burned in their formed on the surface of carbon deposition, this layer of coke will help isolate the following bubble. Can effectively prevent the spread of flame. Moreover, the polyurethane at high temperatures do not produce harmful gases. 
 Polyurethane sheet with excellent thermal insulation properties, to achieve the same insulation requirements, can reduce the building envelope structure thickness, thereby increasing the indoor area. 
 5, resistance to deformation, cracking, finishes stable, safe. 
 6, the structure of the porosity of the polyurethane material is stable and is basically a closed cell structure, not only excellent thermal insulation properties and resistance to freezing and thawing, the acoustic properties. The average life expectancy of the structure of rigid polyurethane foam insulation, under conditions of normal use and maintenance, can reach more than 30 years. Able to do in the structure of the life of the normal use conditions, in dry, damp, or electro-chemical corrosion, as well as insects, fungi or algae growth due to external impact of the destruction of rodents, are not damaged. 
 7, low comprehensive cost. Although the unit price of the rigid polyurethane foam material is higher priced than other conventional insulation materials, but the increased costs will be offset by a reduction in heating and cooling costs substantially.