Wind turbine blades

Created on 11.13

PMI foam (Polymethacrylimide foam), as a high-performance composite core material, is widely used in the wind turbine blade field (especially for large-scale/offshore wind turbines).

It is mainly applied to key load-bearing parts such as blade leading edges, webs, and spar caps. By replacing traditional balsa wood or PVC foam with a sandwich structure of "PMI foam core + carbon fiber/glass fiber panels", it achieves multiple core values:

Significant weight reduction (20%-30% overall blade weight reduction), reducing wind turbine startup energy consumption and tower load, and improving the unit's adaptability to low wind speeds;

Enhanced structural performance—its excellent specific strength (up to 500-800 MPa·kg⁻¹·m³) and fatigue resistance effectively improve blade stiffness, wind load resistance, and lightning strike resistance, preventing blade deformation or fracture;

Optimized environmental adaptability—high temperature resistance (long-term 120-150℃), moisture-heat resistance, and low water absorption adapt to harsh offshore environments such as high salt spray and strong ultraviolet radiation, delaying material aging;

Improved power generation efficiency and service life—through structural lightweighting and stability optimization, it reduces blade vibration loss and extends the service life to more than 20 years, providing core material support for the efficient and safe operation of wind turbines.