A METHOD OF REDUCING SHRINKAGE IN THE PRODUCTION OF STRUCTURAL PANELS FOR A BUILDING
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United States of America Patent
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Nov 24, 2022
app pub date -
Aug 7, 2020
filing date -
Aug 7, 2020
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Abstract
It is known that panels moulded for structural use can be subject to undesirable levels of shrinkage and this can complicate their end use or a building made from them. It is an object of the invention to go at least some way to addressing this problem. Accordingly there is provided a method of significantly reducing panel shrinkage in the production of a structural building panel. The method involves spraying polyurethane foam onto a rigid open mould such that the foam substantially embeds mesh, which prevents or significantly reduces shrinkage of the polyurethane foam. A skin of polyurea is then sprayed over the polyurethane to enhance structural strength of the panel.
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