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Covestro at K 2016: To Feature Cost-effective Polyurethane Rotor Blades

Published on 2016-09-05. Author : SpecialChem

Covesto has Created Large Polyurethane Rotor Blade in China
Covesto has Created Large Polyurethane Rotor Blade in China
Covesto has created the first ever large polyurethane rotor blade in China in collaboration with Shanghai FRP Research Institute in collaboration with HÜBERS and glass fabric manufacturer Chongqing Polycomp. International Corp. (CPIC). It is 37.5 meters long and dimensioned for an output of 1.5 megawatts. This provides important evidence that the resin is suitable for industrial production.

Development of Polyurethane Rotor Blades


HÜBERS and Covestro have used vacuum infusion process to manufacture half-shells for the rotor blades. This new version of process for polyurethane resins involves placing the core materials and glass fiber fabrics in a mold and sealing the structure hermetically with a film. Once the vacuum has been created, introducing the liquid resin starts the infusion process.

Benefits of Vacuum Infusion Process and PU Resin


  • Requires a relatively short amount of time 
  • Prevents the formation of cavities
  • PU Resin flows more easily and ensures better wetting of the glass fibers used for reinforcement
  • Allows faster curing process when the mold is subsequently heated
  • Resin exhibits good mechanical properties

Covestro will showcase its latest developments at the K 2016 plastics trade fair.

Covestro’s Sustainability Concept


Power generation from renewable sources is a key part of Covestro’s sustainability concept. This applies above all to wind power, which is one of the most promising renewable energy sources due to its global availability and the technical progress already made.

Covestro’s Sustainability Concept

Covestro’s innovative and sustainable material solutions improve the efficiency of wind turbine manufacture and support the creation of further onshore and offshore wind farms with a long service life. The company has its own competence center in Otterup, Denmark, to coordinate its global wind energy activities.

Kim Klausen, who is in charge of Covestro’s global wind energy program, said:
“Our aim is to use creative and sometimes unexpected solutions to make the world a brighter place – and power generation is part of this”.

Durable Cable Protection


Maintenance at sea can be associated with huge costs, especially for operators of offshore wind farms.
  • Subsea cables that are permanently exposed to strong currents are particularly susceptible to damage. 
  • Covestro elastomers based on the Baytec® and Desmodur® polyurethane systems are ideal for robust cable protection and have long been used for this purpose. 
  • The protective systems benefit from excellent impact strength and decomposition resistance. 
  • Unlike steel and concrete, components require no further processing, which saves a significant amount of time and money when building offshore wind farms. 

Tekmar Energy Ltd. is one of the companies to be won over by these benefits. One of the European market leaders in the production of subsea cables is making exclusive use of Covestro’s products for the construction of offshore wind farms in China. The two companies recently signed a collaboration agreement to address the increasing demand in the Chinese market.

About Covestro


With 2015 sales of EUR 12.1 billion, Covestro is among the world’s largest polymer companies. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction and the sports and leisure industries. Covestro, formerly Bayer MaterialScience, has 30 production sites around the globe and as of the end of 2015 employed approximately 15,800 people (full-time equivalents).

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Source: Covestro
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