Improvements in or relating to the production of a surface finish on chip board and sheets of fibrous materials

摘要

1,055,658. Surfacing chipboard etc.; laminates. VEREINIGTE ABZIEHBILDERWERKE VEB. May 28, 1964. No. 22116/64. Headings B5A and B5N. Sheets 1 of chipboard or like fibrous material are coated on both sides with a liquid surfacing agent composed of a mixture of synthetic resins with a filler, the coating is pre-dried, e.g. by infra-red lamps 7, and then calendered by calendering rollers 8, 81 and finally the sheets are subjected to heat and pressure in a press I6 to cure the resin. The filler may be calcium carbonate. A sheet 10 of paper bearing a printed wood pattern may be applied simultaneously with the calendering. End discs on the rollers 8, 81 (Fig. 2, not shown) determine the thickness of the resin coating.