| 摘要 |
Double skin, polyurethane foam core building panels are fabricated in a process wherein polyurethane foam forming ingredients (20) are applied to a lower one of the two skins (13), (14) and allowed to rise vertically upwardly into engagement with the upper skin (14) which has a preformed pad (19) of continuous filament glass fibres secured to its inner surface, i.e. the surface toward which the expanding polyurethane foam is advancing. |
