| 摘要 |
A composite material (1) formed of a perforate metal sheet (2) and a coating of vapour permeable water resistant polymer (3). The polymer coating is in the form of polyvinyl chloride or a synthetic rubber material and may be bounded by adhesive or cured onto the perforate metal sheet. The composite material can be profiled to form a supporting structure. The perforate metal sheet is ideally perforate for 25 % of its surface area thereby allowing the composite material to have 25 % of the vapour permeability of the polymer coating whilst providing a material with structural properties of a sheet metal. |
