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Windtech International March April 2024 issue

 

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Germanischer Lloyd has now certified the first polyurethane adhesive for the wind power sector; Henkel's Macroplast UK 8340.
Henkel is now the first company to develop a GL-certified polyurethane adhesive for rotor-blade production. Polyurethane-based adhesives react faster than the conventionally used epoxy resins. Thanks to the lower exothermal reaction during application, this two-component adhesive reduces both the duration and the temperature of the tempering phase. At the same time, because it is applied at low temperatures, the adhesive reduces the likelihood of stress cracking. Another positive feature of the new PU adhesive is its wetting behavior, which shortens preliminary work such as sanding and laminating.
 
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