Perforated sheet-metal plastics-coated on both sides - has one metal surface structured to allow air-escape during coating operation

摘要

The perforations (6) in the metal (1) are filled with plastics, so as to join the two coatings (3,5) to each other. One side of the metal has a structured coating (4), so as to allow air to escape during the coating operation. This can consist of a porous intermediate layer between the metal and one plastics coating, and it can extend over the entire surface of the metal including the perforations. It can be of fibrous cloth or tissue, with a weight of between 20 and 100 g/m2. USE/ADVANTAGE - Typically as roofing strip, with long life and resistance to ageing.