To offer a drop-in solution to overcome the PA66 shortage, we developed an alternative material: The Akulon® IG series is a portfolio of material grades made by combining the strength of PA6 and PA46 – two materials that are fully independent of the Adiponitrile/hexamethyldiamine supply.
Will hydrogen drive a CO2 revolution in the automotive industry?
Hydrogen has the highest energy per mass of any fuel. One kg of hydrogen is equivalent to 33.3 kWh, which means it delivers three times more energy than conventional fuel. But hydrogen’s low ambient temperature density results in a low energy per unit volume. This requires the development of advanced storage methods that have the potential for higher energy density.
At DSM I’ve been working to apply the materials expertise to make safe, effective and very lightweight hydrogen tanks. Hydrogen tanks are the next step in fuel storage, as such storage is a key enabling technology for advancing hydrogen and fuel cell technologies in applications that include stationary power, portable power and transportation. As we has already developed this technology for compressed natural gas (CNG) tanks testing the same material and design principles for hydrogen tanks to meet the needs of the automotive industry was a logical next step.
The two-part tank design features a proven, blow molded liner made of Akulon® Fuel Lock, a polyamide 6-based engineering plastic with a very high barrier to hydrocarbons. The tank can then potentially be further reinforced by wrapping it in unidirectional (UD) continuous fiber-reinforced thermoplastic tapes made of EcoPaXX® polyamide 410. This combination of commercially available materials has already proven to be very effective in CNG tanks, and DSM is now actively testing the concept in hydrogen tanks.
The result would be the lightest-weight plastic tank available for hydrogen storage applications. Reducing weight is key, since every 10 kg removed from a vehicle roughly translates into a reduction in CO2 emissions from the vehicle on the road of one gram per km. For the liner, Akulon Fuel Lock greatly reduces weight compared to metal. It also offers improved permeation versus polyolefin liners, meaning that the gas stays in the tank. The liner material, which is 100% recyclable, is safe with no debuckling.
Furthermore, the material is optimized to remain ductile and tough, even at extremely low temperatures (-40°C). This was important for CNG, but is even more vital for hydrogen storage, as the working pressures are much higher.
Two-wheeler technical know-how: DSM’s materials provide the strength and durability that electric scooters need
A number of e-scooter components require specialized materials to ensure safe and reliable performance. DSM’s portfolio includes materials designed to meet the specific needs of these applications.
How to survive the structural PA66 shortage
Under current market conditions, the supply chain for polyamide 66 (PA66) is under pressure. With the surge in demand for developing lightweight vehicles and pushing the connectivity revolution forward, supply is too concentrated to reliably meet global demand.