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New hybrid fabric brings impact resistance and vibration reduction

News International-French

7 Mar 2017

DSM Dyneema recently launched a new fabric made of Dyneema and carbon fibres with very attractive properties. Golnar Motahari Pour, President of DSM Dyneema, explains to JEC Composites Magazine what this new offer brings in terms of performance.

Golnar Motahari Pour, President of DSM Dyneema
JEC Composites Magazine: Hybrid textiles are not a new thing. How do Dyneema fibres make a difference?
Golnar M. Pour: Compared to other types of fibres, Dyneema fibres bring ductility and impact resistance combined with vibration damping properties, without additional weight for the part thanks to their low density (Editor’s note: relative density 0.97). Moreover, our fibres are extremely environmentally stable, with no moisture absorption problems for example. Compared to aramid or glass, these high-density polyethylene fibres provide improved lifetime and stability for composite materials.

 

The Dyneema© Carbon structure
JCM: Do you propose a “standard” offer with the same Dyneema/carbon ratio or can you produce bespoke fabrics?
G. M. P.: Right now, we are proposing to the industry a woven fabric made of Dyneema and carbon fibres with a one/two ratio and a two/two ratio. We are starting with standard products to build market awareness and impress people with its performance. But we can also offer bespoke light weight fabrics. And here, we are working with various partners to be able to combine Dyneema with different types of carbon fibre for the right application. We have different types of fibres depending on the requirements but here, we have introduced a new fibre called Dyneema SK99 for very demanding and stringent applications, which is the strongest one in our product portfolio. This grade is also used in our unidirectional products for ballistic performance.

The OMP drive wheel and a bicycle made of Dyneema© Carbon

JCM: What are the main application sectors you target first?
G. M. P.: For the moment, we are focusing on the sports & leisure market, including the motor sports market where low weight, ductility and impact resistance or even vibration damping are really valued. We already have commercial applications. The Italian Company OMP uses our hybrid material for a sports car steering wheel due to the need for stability and strength in case of a crash.

The Brabo Hockey Stick taking advantage of vibration absorption and toughness
We recently launched a hockey stick with the Dutch brand Brabo and also a “legality box” with Toyota Motor Sports GmbH. This part, placed under the wheel arch, is made of carbon fibre and Dyneema to protect body work from the projection of small debris. This part will be present all along the car endurance championship and especially in Le Mans. We are also developing a new racing bicycle. Aerospace is a sector where we think Dyneema can be significant in terms of impact protection. We are working towards this but, as you know, it requires a lot of time to access this market. Nevertheless, we have noticed a lot of interest from this sector.

JCM: What will be the next step in the development of this concept?
G. M. P.: It is a new development area for us but we are already thinking of moving forward in the value chain with prepregs. We are working with the DSM resin department to come up with the right resin for these applications. We have over two decades of experience with the type of resin structure needed to stick to polyolefin with our unidirectionals and the flexible composites technology. We are confident that we can find the right solutions for our customers.