SUBSTRATE A wide range of textile materials is used as substrates for coated fabrics. Woven Knitted Nonwoven materials Cotton, Rayon, Nylon, Polyester and blends such as of polyester with cotton or rayon are used as substrate. Polyester is the most popular in staple form for nonwoven material and also in spun form for woven material. Polypropylene is emerging as the fibre of choice because of its low specific gravity, strength properties, chemically inert nature and low cost.