Aachen, Germany -- Gap impregnation is a fairly new process for the production of high-performance parts of fibre-reinforced plastics (FRP) in only a few minutes, and in this process, which is similar to RTM (resin transfer moulding, a temporary flow gap is created, says the German plastics group IKV, of the University of Aachen.
This temporary flow gap and the inclined position of the mould result in rapid, reproducible injection of the resin system with low resistance. The exceptionally fast impregnation of the preform in the space of only a few seconds allows the use of the highly reactive resin systems that are needed for part production on an industrial scale, according to developers IKV and BASF.
Recent tests with the unit have been aimed at using not only epoxy resin systems but also alternative resin systems such as polyurethanes (PU) for the series production of fibre-reinforced plastics parts (FRP).
In cooperation with IKV, BASF developed a new, highly reactive and compact crosslinking PU system for FRP.