1. The flame retardant performance grade reaches Class A, which improves the overall fire protection performance of the steel building.
2. Polyurethane is used as filling on both sides of the tongue and groove, which effectively reduces heat conduction and cuts off water leakage, preventing the fireproof cotton from reducing its strength and thermal insulation performance due to moisture absorption, and making the fireproof insulation performance more durable.
3. High bulk density core material improves thermal insulation performance
4. Both sides of the tongue and mouth are filled with rigid polyurethane foam to enhance the overall strength and prevent deformation of the tongue and mouth.
5. The fireproof cotton is rotated 90 degrees to make the cotton fiber and the board surface vertical, increasing the compressive and tensile strength by more than 50%