NetComposites
Attwater

‘Fast Curing’ Structural Adhesive Suitable for Turbines

01 February 2010

Despite the lack of agreement by leaders at December’s Copenhagen Summit on Climate Change, ITW Plexus expect the use of wind energy to grow at an unprecedented level.

With turbine structures increasing in size, ITW Plexus has invested into researching the use of structural adhesives to bond composite wind turbine components together. During this research, the company believe they have developed an alternative to slow-curing epoxy systems, polyesters, and two part polyurethane adhesives. In response to these products, ITW Plexus has developed a series of fast-curing, 1:1 methacrylate structural adhesives which they say can produce bonds so strong the substrates will delaminate before the bond fails.

ITW Plexus claim that unlike traditional adhesives, these advanced methacrylate adhesives chemically fuse FRP/GRP, composite stiffener spars and perimeter flange joints. They are also said to give increased peel resistance and cycle fatigue resistance while reducing damage encountered during transportation. Room temperature snap cure properties have helped to increase production rates and eliminate the high capital expenses and energy costs associated with post-bake ovens which are required to cure some epoxies. What’s more, researchers say that in most cases these adhesives don’t require any abrasion or surface preparation.

ITW say that there are numerous benefits to using their system, including potentially reduced production costs, shortened assembly times, reduced component weight and resistance to water and UV.

The system has been successfully deployed by Terom Wind Energy in Bolgna, Italy.

Glass fibre reinforced polymer blades have been internally designed and produced using a vacuum-infusion process for their small wind turbine - the ATBV26.

ITW Plexus say that this system allows complete saturation of glass reinforcements with resin and offers a very good fibre-to-resin ratio since vacuum minimizes air pockets forming between fibres and the permeability of the fibreglass. Blade components, made using special moulds, are then finished and bonded together using a Plexus structural adhesive. The total result is a strong but light product, with very good mechanical resistance properties.





Share this story


Related / You might like...

Cobra International Exhibits Product Range at CAMX 2018

Cobra International will showcase a range of composite products at CAMX 2018, including carbon fibre components for the automotive, transportation, marine, water sports and luxury sectors.

Prodrive Develops Process for Recyclable Thermoplastic Composites

UK company Prodrive Composites has developed a process for manufacturing recyclable composite components that can satisfy future end-of-life requirements without any compromise in the performance of the original parts. The company says the P2T (Primary to Tertiary) process not only simplifies recycling, but endows a composite material with the potential to fulfil three or more useful lifetimes.

Elemental RP1 Sports Car Showcases Capabilities of Tailored Fibre Placement

Designers at Elemental Motor have utilised tailored fibre placement (TPF) to extend the use of carbon composites in its RP1 sports car.