| 12:00 AM EST

Natural Fiber-Reinforced Composite Developed for Toyota EV Concept

Last updated on 4/1/2020

Reduced weight is advantageous for EV application
#Toyota #Covestro


Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Concept cars always have features that are not part of existing production vehicles (which is why they are concepts and not things like “production-intent vehicles”), but which, quite possibly, can make it into production. Here’s one that fits that description:

Toyota Boshoku Corp., an interior components supplier to guess who, tapped materials supplier Covestro to work with it in developing a new polyurethane composite material for use in an electric concept car developed by Toyota, the LQ.

Toyota LQ concept

The Toyota LQ, an electric concept vehicle (Image: Toyota/Covestro)

What is interesting about this material is that it is a two-component polyurethane (Baypreg F NF) that is reinforced with kenaf, a plant fiber that Toyota Boshoku has experience working with.

The resulting kenaf fiber-reinforced polyurethane foam has an area density of less than 1 kg/m2 and high strength. The door trim that is made with the material is 30% lighter than conventional materials used for the application.

Mass reduction is particularly important in electric vehicles as less mass to move means the opportunity for longer range.

Toyota LQ interior

Door trim components in the LQ are made with a kenaf-reinforced polyurethane foam developed by Toyota Boshoku and Covestro. (Image: Toyota/Covestro)

In addition to which, the use of the cost-effective, natural fibers is an advantage in terms of sustainable production.


  • BMW Uses Fabric Skin Again

    In 2008 BMW revealed a concept vehicle that was unusual in that the body panels weren’t made from steel, aluminum or composites but, rather, a fabric that was fitted over an underlying metal frame.

  • Breaking Down the Chevy Bolt

    Sandy Munro and his team of engineers and costing analysts at Munro & Associates were contacted by UBS Research—an arm of the giant banking and investment firm—and asked whether it was possible to do a teardown and cost assessment of the Chevrolet Bolt EV.

  • The SOLO EV Is Really Being Built

    From the point of view of structural engineering and assembly, electric vehicles are a whole lot simpler than those with internal combustion engines, which probably goes a long way to explain why there are so many startups showing EVs.