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Prototype of a spar cap. Source: Covestro

Covestro receives DNV GL certification for polyurethane resin

Polyurethane resin developed for wind turbine blades by Covestro received a certificate of conformity to DNV GL standard. So the manufacturers of polymer products have got more efficient and economical replacement for conventional epoxy resins.

According to Kim Klausen, the global head of Covestro’s wind energy program, the new resin has a major influence on stability and durability, the two critical properties of rotor blades. The developers state that the Covestro system is the world’s first polyurethane resin to receive this certification.

DNV GL – an abbreviation of the companies Det Norske Veritas and Germanischer Lloyd, which merged in 2013 – is a leading international industry standard for the safety, reliability, and performance of wind turbines.

Covestro has already tested the polyurethane resin on an industrial scale. They created a prototype of a 45-meter-long spar cap together with SAERTEX® and HÜBERS. The spar cap is a key component of the rotor structure that has to bear the full force of the wind. The spar cap was fabricated at the facility of German Aerospace Center (DLR).

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