Here it should be noted that the tensile strength of extruded plate manufacturer in Weifang, polystyrene board of density and tensile strength have absolute relationship, the average EPS density tensile strength 18Kg / m3 for 110 ~ 120KPa, 20Kg / m3 bulk density about 140KPa. XPS normal bulk density from 25Kg ~ 45Kg extruded sheet, intensity from 150KPa ~ 700KPa or higher. (Only if it meets the thermal conductivity of about 0.03). Water absorption is an important parameter to measure the insulation materials. After absorbing insulation material insulation properties fall, at low temperatures extruded board manufacturers, inhalation of water can easily freeze, destroy the structure of the insulation material, so that the compression plate and insulation performance decline. Because polystyrene molecular structure itself does not absorb water, sheet molecular structural stability, without gaps, solve the leakage of other materials, penetration, frost, condensation and other issues.