New milestone!

There has always been news of polyurethane replacing epoxy resin in the field of wind power blades.

Recently, DNV, an authoritative certification body in the field of wind turbines, officially issued to Covestro the first verification statement to modify the partial reduction factor (γm1) of polyurethane aging for blades.

Covestro carried out complex and rigorous comparative experiments and theoretical analysis.

 Make longer and lighter blade designs possible 

The γm1 coefficient is an important indicator that reflects the long-term aging resistance of wind turbine blade materials, and it is also an indicator to measure the long-term performance of the final blade

Compared with the epoxy resin commonly used in blade materials, the mechanical properties of polyurethane resin are more excellent

Comparison of the cost of two base resin blades

Compared with epoxy resin, polyurethane blades have the advantage of being lightweight, and blades with the same mechanical properties require less resin

Table 1.

Data source: Covestro report

Table 2.

Source: Sichuan Dongshu

With the repayment of wind power, the cost issue has become very sensitive, and major wind turbine manufacturers have launched fierce price competition

From a long-term perspective, polyurethane wind turbine blades are a new development idea.

In time, it is more likely that epoxy resin/polyurethane resin will go hand in hand in wind turbine blades, and it is unlikely to completely replace epoxy resin.
After all, the performance and cost of the two materials are not very different.
Polyurethane resin is not considered a disruptive wind power.
Blade material innovation
.