NONWOVEN WEB

摘要

A non-woven fibre web comprising a plurality of fibres in the x- and y-direction of average length greater than 5mm and a plurality of fibres of average length less than 3mm wherein at least a proportion of the fibres of average length less than 3mm are orientated in the z-direction, and wherein the proportion of fibres of average length less than 3mm is at least 20% of the total weight of fibres, and wherein the density of the non-woven fibres web is from 0.1g/cm<3> to 0.35g/cm<3> is disclosed. Also disclosed is a gas diffusion substrate, a gas diffusion electrode and a membrane electrode assembly comprising said non-woven fibre web.