First order of polyurethane resin for wind blades

Posted 2021-05-10 科思创在中国

Resin enables longer and stronger blades than traditional materials

Covestro, a leading global supplier of high-performance polymer materials, has delivered its first commercial order of polyurethane raw materials for wind blades to China. China is the world’s largest wind power market with 221 GW of installed capacity at the end of 2018, according to the World Wind Energy Association. The blades, produced by Zhuzhou Times New Material Technology (TMT), one of the largest manufacturers of wind blades in China, have then been delivered to Envision, a leading global wind turbine technology company. They are scheduled to be installed in a wind farm in East China in July 2019.

Covestro delivered polyurethane resin to TMT for the production of 18 polyurethane wind blades of 59.5-meter-length, also for the spar caps and shear webs. These blades were delivered to Envision, heralding the successful deployment of Covestro’s innovative polyurethane resin in blades for commercial wind farm projects.

To ensure successful deployment, the Covestro wind power team produced a prototype of the wind blades which has passed static and fatigue tests. The prototype was put into trial operation at a wind farm in central China in 2018. 

Polyurethane resin – a game-changing innovation

(Diagram of a 121-type polyurethane wind blade)

Superior properties

Covestro’s novel polyurethane infusion resin was developed to help the wind power industry meet the growing demand for longer wind blade designs. Wind turbine rotor blades of this kind are typically made out of fiberglass-reinforced resin by applying vacuum infusion technology. The successful use of polyurethane resin for manufacturing large-scale rotor blades for wind turbines suggests that the material itself features superior mechanical properties and anti-fatigue performance. There are also benefits for the production processes in the wind blade factory, for example, a faster curing process and better processing properties todeliver higher productivity levels.

Irene Li, 

Head of PU Application Development Asia Pacific at Covestro

 “This is the first step to realizing the industrialization of polyurethane resin in the wind industry, opening up a new chapter in polyurethane chemistry. We believe that our polyurethane solution delivers significant advantages in wind blade production and along the value chain.”