The process comprises providing a polyurethane foam layer having a density of 8-15 g/l and a compressive stress-strain characteristic of 10-25 kPa, hot pressing the layer in a mold to obtain a core (3) having an upper side (4) and a lower side (5), associa...

A light weight sandwich panel which, as a whole, has high rigidity against bending and shearing and in which a core material has high rigidity against compression. A sandwich panel comprising two resin skin material sheets and a thermoplastic resin core ma...

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 ...