TRB Lightweight Structures has developed a biocomposite resin based carbon fibre reinforced sandwich panel door leaf with a 100% recycled foam core which is fire rated for both surface and underground rail use.
This is lighter than an aluminium equivalent, can be operated using a less heavy duty mechanism and offers the potential for faster opening. It has a 40 year life expectancy.
The resin is derived from a renewable alcohol produced from a natural waste by-product from refined sugar production, which is non-toxic and does not use volatile organic solvents.