Together with the ribs, the two spar caps in the rotor blade shells are, one might say, the skeleton of each and every rotor blade of a wind turbine. They must be able to withstand very high loads for the operational life of the turbine. Therefore it is essential to deliver high component quality and to ensure that the best possible properties of the mix of fibres and matrix are achieved.
Our Pulcap® profiles are manufactured using the pultrusion process. The continuous process enables the manufacture of almost endless profiles with a consistently high quality. In the pultrusion process, reinforcement fibres are pulled very straight in tension, which largely reduces the occurrence of fibre undulations and therefore inconsistency in fibre orientation that frequently occurs in other manufacturing processes.
High mechanical properties
Pulcap® pultruded profiles are precured and quality-tested insertable components with clearly defined, very high mechanical properties. The high tensile stresses during the pultrusion process significantly reduces the possiblity of excessive material defects such as fibre undulations or air bubbles. This method reduces error rates, manufacturing risk and repair requirements for the spar caps to a minimum.
Our material is tested in advance according to defined criteria – only approved material is used. Thus material defects that usually arise in the spar cap area during the traditional hand laminating process.
Reduce your mould occupancy time
The mould occupancy time for the rotor blade shells is much shorter using Pulcap® pultruded spar caps than for spar caps produced in the traditional manner.
Glass fibre reinforcement
Carbon fibre reinforcement
Vinyl ester resin
UV-curing resins, depending on the profile cross-section
Reinforcement with glass or carbon fibres possible
Various cross-sections: width up to 200 mm, wall thickness 1.2 to 5 mm
Pulcap® pultruded profiles for spar caps are also available with a peel ply on request, so no need to roughen the surface, e. g. by sand blasting, before fitting the profiles.
DIN EN ISO 1183
Fibre volume content
DIN EN 2564
Tensile Modulus 0°
DIN EN ISO 527-5A
Compressive Modulus 0°
DIN EN 2850
Compressive Strenght 0°
DIN EN 2850
DIN EN 2850
Bending Modulus 0°
DIN EN ISO 14125
The figures given above are mean values obtained through continuous statistical checks and tests. They are provided as an indicator of quality only and do not establish any warranty unless and until expressly agreed in a purchase contract.