An insulating panel incorporating recycled material

摘要

An insulating panel comprises a first sheet 2 with and a second sheet 3 and an insulating core comprising a main polymeric foam body 4 and a recycled foam portion within the foam body. The insulating foam core may comprise a polyisocyansurate or phenolic foam and the recycled foam portion may preferably be the same formulation as that of the main body. The recycled foam portion may take the form of shredded foam pieces 25, which will preferably take the form of pellets or a block or briquette (51, fig 5). One of the sheets may be profiled to define a recess and the recycled foam portion may be located at least partly in the recess. The sheets may joint forming profiled portions and may preferably be sheet metal. A method of manufacturing an insulated panel of this type is also claimed, wherein the recycled foam portion may be introduced prior to lay-down of liquid foam reactants to ensure that the recycled foam portion is integrated into the main foam body.