Advanced Prepregs
Gurit’s long history supplying prepregs to the wind energy industry has also allowed Gurit to lead the way be introducing the next generation of prepregs specifically designed to make turbine blade manufacture faster, easier and cheaper. This section presents some of the advanced prepregs developed by Gurit and in used in turbine blade manufacture today.
Velinox™ 100
Velinox™ 100 is a new resin system, developed by Gurit as a next generation resin platform to enhance our current wind energy prepreg and SparPreg™ products. Velinox™ 100 is ideally suited to benefit the cure of thick sections, such as wind turbine blade spars and roots.
This unique chemistry does not exotherm in the same way as a standard epoxy, enabling the cure profile to be modified to eliminate dwell periods, for controlled exotherm. The result is a greatly reduced production cycle improving the mould utilization.
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SPRINT®
With the advent of large blades, new prepreg technology was required to meet the increasing technical challenges in producing high quality components. Gurit’s award winning, patented SPRINT® technology, was ideally suited to fill this need and continues to lead the market as a composites technology platform for very large structures.
Available in multiaxial or woven formats, SPRINT® enables the production of thick section laminates of very high quality (very low void content) using standard curing and vacuum bag operations.
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SparPreg™
The main load bearing structure of a wind turbine blade is the spar component which is either integrated into a structural shell as a spar cap, or constructed in parallel production to the shell as a separate spar structure complete with shear webs.
What is common to both approaches is that the utilisation of unidirectional fibre (UD), glass or carbon, to provide bending strength and stiffness. The quantity of UD material required is significant, resulting in laminate sections up to 50mm thick towards the root section.
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