1. Comparison of thermal conductivity: Since the thermal conductivity of polyurethane is 0.021w/m.k and glass wool is 0.05w/m.k, the thermal insulation effect of polyurethane sandwich panels is better than that of glass wool panels, and it is also conducive to saving the use of walls space.
2. Comparison of water absorption properties: Polyurethane hardly absorbs water and can be directly immersed in water, while glass wool absorbs water seriously and loses its thermal insulation performance after absorbing water, causing bacterial growth.
3. Comparison of bulk density performance: Since the density of the polyurethane sandwich panel is 40kg/m3, the foaming is uniform and will not produce dirt, while the density of the glass wool is 12kg/m3, which belongs to the flocculent soft material and is easy to be parasitized by bacteria.
4. Comparison of compressive properties: The compressive strength of glass wool board depends on the strength of one steel plate, and the compressive strength of polyurethane sandwich panel depends on the strength of both steel plates and polyurethane rigid foam.
5. Dimensional stability: Since the polyurethane sandwich panel is produced by a continuous production line in the factory, it can maintain its dimensional stability. The glass wool board is prone to unevenness, and has great requirements for construction.
6. Installation and construction comparison: The installation and construction of the polyurethane sandwich panel is more convenient, and the self-tapping screws are hit in the hidden part of the interface, which is not easy to corrode, and can play the role of thermal insulation. The construction of glass wool board is relatively difficult, the construction period is long, and the construction quality is difficult to control.
