Pultruded strips
AssigneeVestas Wind Systems A/S
InventorAlessio D'Alesio
Life of this patent
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Abstract
A pultruded strip (50) of reinforcing material for stacking with one or more similar strips (50) to form a spar cap for a wind turbine blade is disclosed. The pultruded strip comprises a core (56) comprising fibres (58) disposed in a resin matrix (60) and a sacrificial layer (52) at least partially covering one or more surfaces of the core (56). The sacrificial layer (52) is a resin layer defining an adherend surface (62A) of the strip. A pultrusion process for making such a strip (50) comprises drawing resin-coated reinforcing fibres (58) through a pultrusion die (80) in a process direction to form a core (56) of the strip (50) and applying further resin (53) to one or more surfaces of the core (56) to form a sacrificial resin layer (52) defining an adherend surface (62A) of the strip (50).
Claims16
A pultrusion process for making a pultruded strip suitable for stacking with one or more similar strips to form a spar cap for a wind turbine blade, the process comprising:
- drawing resin-coated reinforcing fibres through a pultrusion die in a process direction to form a core of the strip;
- applying further resin to one or more surfaces of the core to form a sacrificial resin layer defining an adherend surface of the strip;
- and
- removing resin from the sacrificial layer through a surface treatment process to activate the adherend surface.
A pultruded strip of reinforcing material for stacking with one or more similar strips to form a spar cap for a wind turbine blade, the pultruded strip comprising:
- a core comprising fibres disposed in a resin matrix;
- and
- a sacrificial layer at least partially covering one or more surfaces of the core, wherein the sacrificial layer is a resin layer defining an adherend surface of the strip;
- and
- wherein the sacrificial layer has an activated adherend surface formed by using a surface treatment process to remove resin from the sacrificial layer.
Dependencies are inferred from the claim text.