Method for producing a reinforcing and soundproofing panel for vehicule roofs, reinforcing member obtained from such method and use of a two component polyurethane compound for producing said reinforcing member

A first Kraft layer is provided between two polyethylene layers forming a first layer (A) on which a foam layer (C) and a second Kraft layer arranged between two polyethylene layers are provided forming a second layer (B). The three layers are moulded and the product is cut to the desired size. The central foam layer (C) is formed of polyurethane comprising a first component that is a polyol and additives mixture, and a second component that is modified methylene diisocyanate (MDI). A rigid element (10) is thus obtained which density and thickness may be readily modified by varying the amount of foam applied in the process without modifying the product.