| 摘要 |
A sheet like structure comprises a flexible metal substrate e.g. of aluminium which is impressed so as to have projections on one side and depressions on the other with an adhesive membrane contiguous to it on one side. The impressions in the metal allow it to be readily bent and after bending to lie flat rather than become arched. The invention allows the application therefore of a thin metal sheet, for instance on an outside surface where it will absorb ultraviolet radiation and thus protect the adhesive membrane by which it is secured to the surface to be protected. The adhesive membrane is preferably bituminous, preferably a bitumen-rubber mix and may also comprise a scrim of glass or polymeric fibres. |
