Color polyurethane composite board Caigang polyurethane sandwich composite panels raw materials used mainly for color pressure plate and polyurethane foam polyurethane foam polyether or polyester as the main component A component polyisocyanate Cyanamid ester as a main component The B component. A, B two components in the event of mixing. Both chains increased in the event of reaction and the reaction of the coach at the same time, it will absorb moisture from the air rock wool sandwich wall, reflect the occurrence of deflation composite rock wool sandwich panel, rock wool sandwich Buying generating a large number of bubbles in the solidification formed in a very short time the actual length of the foam structure is mounted installation methods and precautions measured sheet, according to the measured length of the corresponding plate number check sheet length, the plates were cut when needed. Will be raised to the roof plate by plate arrangement start line placement, and width of the sheet covering the alignment mark line start line. And at both ends of the plate length direction of the length of the discharge structure design.