Abstract: A process for the manufacture of an article such as a tray made of laminated plastics having a non-slippery surface comprises the steps of forming on a temporary flexible support a vulcanizable coating comprising a mixture of 100 parts of crude polyethylene chlorosulphonate rubber with a 3-50 parts by weight of heat-hardenable melamine resin, forming of a pack of:(a) a core for the laminate,(b) at least one sheet of melamine impregnated paper or melamine impregnated fabric, heat-hardenable on one face of the core (a),(c) the said temporary support with the said vulcanizable layer being in contact with the component (b); and pressing the pack at 125-155.degree. C. to simultaneously vulcanize the rubber, harden the resin and combine the components into a monolithic laminated structure.