Current, Onshore blades have the lengths up to 60 meters, and the length of offshore blade can even reach to 100 meters. The increase length undoubtedly will increase the loads of the blade, which place higher structural demand for the other components. So the weight reduction of the blade is becoming more and more important.

Comparing to other foam core, PMI can provide the same mechanical properties with low density, which can reduce the weight of the composites components sharply, and because of its fine cell size, resin uptake is also less.