Prepreg component then requires a 70°C postcure to generate full strength. Being able to generate similar mechanical properties to those of 120°C curing aerospace prepregs (from 50°C lower input energy) without compromising the prepreg shelf-life can be considered a significant advance in prepreg technology – one which has been readily taken up by America’s Cup, TP52 & GP42 builders. Pushing the technology forward The TP52 class has been at the forefront of advanced technology in the race boat world, not only in terms of the resin chemistry and construction techniques used, but also by adopting the latest fibre technology for mast construction. Fig. 5: Carbon fibre modulus vs. relative fibre cost. Whereas standard HSC (High Strength Carbon) fibres have a modulus of 235-240 GPa, the fibres used in TP52 masts are close to double the stiffness – around 450 GPa – at no extra weight. This UHMC (Ultra-High Modulus Carbon) is over 15% stiffer than the HMC (High Modulus Carbon) allowed for America’s Cup Class and over 50% stiffer than IMC (Intermediate Modulus Carbon), which is becoming prevalent in some of the newer Airbus flooring panels. Four new TP52's were launched this year and SP is proud to have been involved in all of them. Like last year, SP hopes that an SP boat will be crowned TP52 Med Championship winner and that prepregs will continue to set the pace in the marine race boat market. Contact: gurit@gurit.com More information: www.gurit.com FREE SUBSCRIPTION (1 year/8 issues) Please complete the form on line: www.jeccomposites.com/magazine-subscription/ No51 September 2009 / jec composites magazine 33http://www.gurit.com http://www.compositesweek.com/ http://www.jeccomposites.com/magazine-subscription/