Foam sandwich 1. Fire performance: rock wool sandwich polyurethane seal bilateral raw materials used in the production process and formula, it has excellent fire performance. Tests showed that it has over 1000 ℃ fire resistance. Bilateral polyurethane seal rock wool sandwich panel has passed the test of Italy authoritative testing organizations, in accordance with the International Organization for Standardization. 2. Insulation resistance: thermal conductivity of polyurethane seal on both sides of the insulation of rock wool sandwich panel is based on rock wool, rock wool core material with a thickness corresponding proportion of the calculation obtained. Noise absorbing effect is remarkable: Polyurethane bilateral seal rock wool sandwich panel for noise transfer a significant reduction in the role, especially for a place designated by the flight. In addition, the use of rock wool roof, rain, hail on the roof of the building steel interior noise caused by the impact. 

keywords: Insulation sandwich boards, foam sandwich panels, insulation boxes,