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Verwertbare Ergebnisse
The use of thermoplastic materials in building components is now well established, with extrusion as the primary production process. Thermoplastic materials offer many advantages in terms of physical and environmental performance when compared with the more traditional materials.
However, the use of plastic components has been restricted to lower performance products, as the use of these polymeric materials using conventional extrusion technology becomes less cost effective in comparison to metallic materials for higher load bearing structures, such as curtain walls, conservatory roofs and beams. As a result, the more traditional and higher cost products, namely aluminium and steel, have dominated this sector of the market. This project has responded to the demand for future technological development in this application to move away form using internal metal stiffeners in favour of composite related pultrusion or co-extrusions, in order to realize the potential improvements in thermal insulation for the outer shell of the building.
The project has built on the basic technology of continuous glass reinforced thermoplastic parts and has overcome a number of technological obstacles to prove the localized application of these materials within plastic extrusions, thus achieving reduced cost, lower materials use and high quality surface finish. Through this work a process has evolved capable of producing structural parts of high stiffness, with levels of complexity and surface quality demanded by the target sector. In addition, a methodology has been developed to aid assured application of the new technology. The design, manufacture and testing of case study structural profiles has been demonstrated to provide an increased level of confidence amongst the new technology providers in the partnership and also with potential end users of the stiffened extrusion products.
Economic analysis of the profiles produced has indicated savings of up to 25% over traditional thermosetting pultruded products and equal process efficiency to that of conventional extrusion techniques. Coupled with their inherent advantages over metallic based profiles, such as improved thermal insulation, better parts integration, self coloured products, reduced maintenance, etc. this should ensure that stiffened extrusions capture a significant portion of the market.
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