Extrude type high densitypolystyrene froth heat preservation board,who possess the absoluteairtight type air bubble structure,Therefore possessing the fineheat insulation and heat preservation capability,the good passesthrough the wet coefficient. Possessing the low thermal conductancecoefficient ,high resisted pressure,low inhales ability inwater,that the low density foamed plastics of tradition does nothave, especially suitable in the heat insulation and dampproofengineering of the building,It is the highest material of cheapcharacter of price in the building industry heat preservation heatinsulation material