| 摘要 |
A composite insulating panel of the type comprising an external metal skin, an internal metal skin and an insulating core of foam material therebetween is manufactured by conveying one of the metal skins continuously along a flat bed with an outer surface of the skin lowermost; laying down liquid insulating foam reactants onto the first skin; leading the second metal skin continuously over the liquid insulating foam reactants and the first metal skin; heating the assembly in an oven to allow the foam reactants to expand to form an insulating core between the metal skins; cutting the panel to a desired length, and applying a seal to at least one of the exposed foam edges of the panel. The seal which comprises a gas and/or vapour barrier is applied in-line. The seal may be formed by a seal forming liquid applied by spraying or coating, a polymeric film, a metallic foil or a laminate foil comprising polymeric material with a metallic coating. The insulating panel may be used for roofing and for wall cladding, partitions, compartmental wall panels cold store panels, clean room envelopes or food processing areas. |
