During the manufacture of glass-fibre reinforced epoxy resin laminates for the construction of rotor blades for wind energy converters there is often a problem during manufacture when fixing glass inlays in moulds with steep slopes.
Various positioning aids are commonly used in such cases, e.g. spray adhesives with a solvent base, powdered adhesives which are scattered and ironed into place or glass inlays pretreated with adhesive.
All fixing aids have disadvantages to a greater or lesser extent in terms of compatibility, occupational safety and processing effort.
BLUE 21 is a spray adhesive based on a rubber-modified epoxy resin free of curing agents and solvents. This leads to compatibility with the infusion resin and avoids problems with solvent vapours.