DSM & TeXtreme built Nuna7 car to compete in solar race

The unique lightweight design of the Nuna7 has been made possible by the close collaboration of DSM with Oxeon, makers of TeXtreme. Together the companies proposed a state-of-the-art composite system, using a sustainable styrene-free Daron resin from DSM in combination with high-performance TeXtreme carbon fiber fabrics from Oxeon.

DSM is the innovation partner of the Nuon Solar Team that will compete in the 12th edition of the 2013 World Solar Challenge. This solar-powered car race is held every two years, covering 3000 km through the Australian outback. The structural components of the team’s car, Nuna7, are primarily built with TeXtreme Spread Tow carbon reinforcements.

The 2013 edition of the solar race will bring new challenges, as for driver safety reasons new race regulations require significant changes in car design. These include the addition of a fourth wheel for improving stability and a larger driver’s canopy, requiring a full remodel of the vehicle and a complete change of the construction.

A TeXtreme 60gsm fabric using HM carbon fiber (E-modulus of 395 GPa) was used instead of a traditional TeXtreme 76 gsm fabrics using IM carbon fibers (E-Modulus of 294 GPa). This immediately gave an increase in stiffness at the same time as reducing weight. The TeXtreme usage also resulted in better impact tolerance. The styrene-free Daron resin provided a further increase in stiffness of 30 % as a result of the excellent fiber-resin interaction.

The novel styrene-free Daron resin from DSM is a high performance resin, with good thermal properties and is user friendly as no additional protection is required besides goggles and gloves during application. This is a real benefit, particularly when complex shapes have to be made. In order to achieve the maximum performance of the composite laminate, only a mild post-cure is needed, even when the laminate is very thin.

TeXtreme Spread Tow reinforcements are a novel kind of composite reinforcement suitable when looking to reduce weight and improve mechanical properties. TeXtreme is successfully used in Americas Cup, NASCAR, advanced aerospace applications, Formula 1 as well as sporting good applications such as bicycles, skis, golf shafts and ice hockey sticks.

The 2013 World Solar Challenge starts the 6th of October in Darwin with finish in Adelaide the 13th of October. In total there are over 40 teams from different parts of the world participating in all classes of the race. Nuon Solar Team has won four times out of the six times the team has participated in the race.

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