The PVC Structural Foam for Wind Turbine Blades segmentation by type, namely rigid foam, flexible foam, and hybrid foam formulations, also reflects market taxonomy. Rigid foam, which constitutes roughly 55 % of total shipments, is engineered for high compressive strength and low cellular collapse, making it the preferred material for the blade core where load‑bearing capacity dominates. Flexible foam accounts for about 30 % and is selected for blade skin applications that demand elasticity to accommodate thermal expansion and surface‑damage tolerance; its lower modulus also reduces weight penalties. Hybrid foam, representing the remaining 15 %, blends rigid and flexible polymers to achieve a balance of stiffness and impact absorption, increasingly adopted in blade root zones where mixed loading conditions prevail. Each type commands a distinct price premium and processing footprint, thereby influencing the aggregate market size: the dominance of rigid foam drives volume‑based revenue, while the higher per‑kilogram cost of flexible and hybrid grades adds value‑based growth opportunities.