From choi steel rolling pressure, rock wool feeding, polyurethane foam, double track forming, cooling cutting and automatic production and become a new type of rock wool sandwich panel; Or retain the traditional caigang fire rock wool sandwich panel, environmental protection, and gathered the polyurethane waterproof, thermal insulation performance, is a new type of polyurethane rock wool sandwich panel, have fire prevention, environmental protection, waterproof, thermal insulation, decoration etc.