GB1017154A - Improvements in or relating to laminated plastics materials - Google Patents

Abstract

1,017,154. Laminates and laminating. UNIVERSAL LEATHER GOODS CO. Ltd. Oct. 29, 1963 [Nov. 22, 1962], No. 44111/62. Heading B5N. Laminates comprising two layers of plastics material, one of which is an expanded material are produced by heating a first layer to a welding temperature and uniting it with an expanded layer in the nip between a pair of rollers, said expanded layer being pre-heated on its contacting surface and being produced by continuous casting. In the embodiment of Fig. 2 (not shown), expanded plastics material, e.g. p.v.c., is produced by coating a paper carrier 28 with foamable resin at 32, passing it through a hotair oven 36, cooling it at 38, 39 and separating the expanded product from the carrier. Optionally, the carrier may first be coated at 29 with a layer of plastics material compatible with the other layer of the laminate.- The expanded material is mounted at 21 (Fig. 1), and passes via an infra-red heater 20 to the nip formed by rollers 22, 23, the former of which may be an embossing roller the latter being water-cooled and rubber-covered, where it contacts a layer 12, e.g. of transparent p.v.c., which has been printed by rollers 13, 14 and heated to welding temperature by infra-red heater 18. The heat of layer 12 causes fusion of that layer with the surface of the expanded layer and the product is cooled by rollers 25, 26 and wound up. Optionally, an interlayer of woven open-mesh fabric or non-woven nylon or polyethylene terephthalate fibres may be fed to the rollers 22, 23 or introduced between the expanded layer and its skin on the carrier. Further laminates may be produced by welding the finished product 40 to a similar material. The casting process may be continuous with the welding process.