A high-altitude wedding – but one that needs the correct epoxy resin-polyurethane ratio to last!
Juni 28th, 2010 | By Frank in Allgemein, Composite production, Engineering, Exhibitors, Innovation, Wind Energy Industry | No Comments »Every movement must be just right when the blade and rotor hub of a wind turbine are married together at a dizzy height. Because screwing the rotor blade onto the rotor hub 100 metres above the ground represents a major bonding technology challenge. Heavy-duty threaded bushes are bonded into the fibre-reinforced flange on the blade holder of each blade – and the bond must be absolutely rock solid.
Epoxy resins are the elixir for numerous composite applications. They consist of polymers, which together with suitable hardeners produce a duroplastic plastic of high strength and chemical stability. When epoxy resin and hardener are mixed, after a specific time, curing of the originally viscose mixture takes place. Depending on the formulation and temperature, this time span can take a few minutes or may last several hours. In some cases, the curing time may also take several months.
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