A recent polyester resin works well in the vacuum infusion used to make turbine blades. DSM Composite Resins says its Synolite 1790-G-3 has several performance improvements over other traditional unsaturated polyester and epoxy resins. The material is also said to exhibit better wet-out of glass fiber, allowing more effective molding with a broader variety of glass fibers, including reinforcement types commonly available in China.
Synolite 1790-G-3 allows curing blades at room temperature. This lets manufacturers work with shorter production cycles and reduce total system costs by up to 40% compared to epoxy resin-based systems, reports DSM.
The resin also demonstrates low exothermic heat in thick laminates yielding lower mechanical stress in the blade and longer mold life – a key factor in the manufacture of larger blades that require longer gelling times and more complex curing. The material features a fast through-cure in thin laminate parts and delivers consistent performance from batch to batch.
The material meets the evolving demands of wind turbine blade developers in China and the rest of the world, says Achim Johannes, Business Manager Advanced Composites. “Blades made from the material are durable, strong, and more energy efficient to produce thanks to its simplified curing process,” he says.
The new resin is commercially available and will be produced in China and in Europe.
DSM offers a complete package of services to blade manufacturers, from consultancy to technical support spanning the entire production process for wind turbine blades. The service will include advice on reinforcement type, adhesives, gel-coats and coating systems.
DSM Composite Resins