Patent GB-839657-A (GB)
Title: Method for applying a layer of thermoplastic resin or thermoplastic material to the surface of a foamed plastics material
IPC: B32B27/00
Filed: 1957-10-23
Abstract: A foamed plastics material is covered with an adherent surface layer of a thermoplastic material by placing the foamed plastics material and a layer of thermoplastic material into a heated mould while interposing a removable metal insert between the thermoplastic material and the mould, pressing in the mould until the thermoplastic material sticks to the foamed plastics material, and thereafter removing the resulting coated foamed plastics material and insert from the heated mould.  The coated foamed plastics material may be removed from the mould whilst hot, and the mould used again, but the insert is not stripped off until the material is cold.  The foamed plastics material may be a polyvinyl chloride foam, polystyrene foam or polyurethane foam.  The thermoplastic material may be polyvinyl chloride, polyvinyl alcohol, a polyamide, or a butadiene copolymer with either acrylonitrile or styrene, and may be applied either as a continuous sheet or as a paste containing a plasticizer.  The metal insert may be a metallic foil, e.g. of tin, copper or aluminium, or it may be a somewhat thicker piece of metal.  The mould may be made from a suitable metal, e.g. bronze, brass or steel.  A mould release agent, e.g. a silicone oil, paraffin oil or soap solution may be interposed between the mould and the insert, or between the insert and the thermoplastic layer, or both.  The foamed synthetic resin may be shaped as well as coated by using a suitably-shaped mould.  An article of foamed plastics material may have the whole or part only of its surface coated with thermoplastic material by this method. The thermoplastic material surface may be coated with a synthetic resin lacquer, e.g. one containing an isocyanate-modified polyester and an organic polyisocyanate, which may provide a glossy or matt finish and may be pigmented or not.  The products may be used as protective pads on the dash-boards of automobiles or as upholstery units.  Specifications 769,680 and 769,682 are referred to.ALSO:A foamed plastics material is covered with an adherent surface layer of a thermoplastic material by placing the foamed plastics material and a layer of thermoplastic material into a heated mould while interposing a removable metal insert between the thermoplastic material and the mould, pressing in the mould until the thermoplastic material sticks to the foamed plastics material, and thereafter removing the resulting coated foamed plastics material and insert from the heated mould.  The coated foamed plastics material may be removed from the mould whilst hot, and the mould used again, but the insert is not stripped off until the material is cold.  The foamed plastics material may be a polyvinyl chloride foam, polystyrene foam of polyurethane foam.  The thermoplastic material may be polyvinyl chloride, polyvinyl alcohol, a polyamide, or a butadiene copolymer with either acrylonitrile or styrene, and may be applied either as a continuous sheet or as a paste containing a plasticizer.  The metal insert may be a metallic foil, e.g. of tin, copper or aluminium, or it may be a somewhat thicker piece of metal.  The mould may be made from a suitable metal, e.g. bronze, brass or steel.  A mould release agent, e.g. a silicone oil, paraffin oil or soap solution may be interposed between the mould and the insert, or between the insert and the thermoplastic layer, or both.  The foamed synthetic resin may be shaped as well as coated by using a suitably shaped mould.  An article of foamed plastics material may have the whole or part only of its surface coated with thermoplastic material by this method. The thermoplastic material surface may be coated with a synthetic resin lacquer, e.g. one containing an isocyanate-modified polyester and an organic polyisocyanate, which may provide a glossy or matt finish and may be pigmented or not.  The products may be used as protective pads on the dash-boards of automobiles or as upholstery units.  Specifications 769,680 and 769,682 are referred to.