03/06/2013

www.gupta-verlag.de/polyurethanes

Bayer MaterialScience competence centre focuses on PU resins for wind turbine rotor blades

In the manufacture of the blades the resins are combined with fibres in a mould and form a very strong material composite. The finished rotor blades are sturdier, longer-lasting, and more lightweight than those produced with the epoxy resins and unsaturated polyesters used previously, says Bayer MaterialScience. According to the company, the most important advantage of these resins is the greater process and cost efficiency. Polyurethane resins are more free-flowing than conventional materials, they spread better in the mould and can be processed more quickly. They also harden faster and under simplified conditions. Bayer is confident that automated manufacture of rotor blades with robots will also be possible. Around a quarter of the total costs of a wind turbine are for the rotor blades alone, so reducing these costs is therefore a key driver in wind power development. "The use of polyurethane resins could reduce the cycle time per blade from 16 to 24 hours currently to seven to eight hours, thus significantly increasing productivity. We are working to cut the cycle time still further,” says Kim Harnow Klausen, head of the Bayer MaterialScience global wind power competence centre.

www.gupta-verlag.de/polyurethanes