Low thermal conductivity, good thermal insulation performance, is currently a very good thermal insulation material.
Rigid polyurethane has a closed porosity of more than 90%, is a hydrophobic material, does not increase thermal conductivity due to moisture absorption, and the wall does not seep water.
As it burns, carbon is deposited on the surface of the foam, which helps isolate the underlying foam, avoid flame spread, and does not produce harmful gases.
Good deformation resistance, not easy to crack, stable performance.
