What are the filling cores of wind turbine blades?

Core (Foam) Structural

Used as reinforcement of “sandwich” composite materials, as it is rigid, light, and highly durable.
It has been used in the composites industry for over 45 years in the manufacture of boats, planes, trucks, automobiles, wind turbine blades, building panels, etc.

PET Foam (Polyethylene Terephthalate)

It can be found in virgin or recycled material versions, in smooth plates, or with holes and/or grooves. It is light, has excellent mechanical and thermal properties, has low water absorption, and does not emit toxic gases.

Balsa Wood

High-quality organic material made from final grain balsa wood. Excellent resistance to shear,
fatigue, and compression, high thermal and acoustic insulation. Compatible with virtually
all thermosetting resins.

PVC Foam (Polyvinyl Chloride)

Excellent chemical resistance, minimal water absorption, thermal insulation. It is compatible with most resin systems (epoxy, polyester, and vinyl ester).

Polypropylene Beehive (Honeycomb)

Light, resistant, waterproof, and versatile. Used in construction, transport and nautical. Mechanical properties are similar to foams, highlighting the high compressive strength and differentiated characteristics of acoustic and thermal insulation.

Juliana Lucena, Dr. in Energy (UFPE), Production Engineer (USP), Professor at the Federal Network

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