Generally, polyurethane sandwich panels are divided into two types, one is pure polyurethane, and the other is compounded with polyurethane rock wool. The advantages of the two are different.
The bending resistance and load-bearing effect of the pure polyurethane sandwich panel are quite good, and its shrinkage advantage also makes the installation more convenient. It is more solid and not easy to disengage.
The second is the fire resistance. Generally, the fire resistance of pure polyurethane sandwich panels can reach B1 level (ignition and no fire), ordinary polyurethane sandwich panels can reach B3 level (ignition and fire for 3-5 seconds), and polyurethane edge-sealed rock wool panels The fireproof performance of the polyurethane edge-sealed glass wool board is strong, and it can reach Class A (not easy to ignite).