| 摘要 |
A backing sheet 12 (2 in Figure 3) is led from one of two coil stations 13, 14. A top sheet 15 (3 in Figure 3) is led from one of two top sheet coil stations 16, 17 or from the second backing tray coil station 14. The sheets 12, 15 are then profiled prior to preheating. A release material may be applied to the lowermost face of the sheet 15 prior to preheating. Liquid foam reactants are laid down on the sheet 15 with tapes applied to the side edges to prevent spillage. The sheet 12 is then applied and the reactants are expanded in an oven to form a composite panel. An edge seal 9 may be applied to one longitudinal side edge of the panel. |
