The production of rock wool core material begins with natural minerals-such as basalt and dolomite-as the primary raw materials. These are melted at temperatures exceeding 1450°C and then spun into fibers using a high-speed centrifuge. During this process, binders and water-repellent agents are introduced. The fibers are subsequently collected and laid out using a pendulum-style distribution system, followed by a curing and cutting phase to produce rock wool products in various specifications.
Rock wool sandwich panels are created by firmly bonding metal facings to a rock wool core using a high-strength adhesive (such as polyurethane or modified phenolic resin), resulting in a "sandwich" composite structure. Key design parameters that influence the performance of these panels include the thickness and strength of the metal facings, the density and thickness of the rock wool core, and the properties and application rate of the adhesive.