BigPatents India

A method for the manufacture of a composite synthetic fibre material in the form of sheets or strip intended for the use in the footwear field, especially for the production of footwear insoles. The method comprises the steps of: homogenization of the fibres; carding of the fibres to obtain a fibre structure arranged in several layers; multi-phase needle punching of the layered fibre structure to obtain a felt; characterized in that said felt is subjected to a controlled surface heat treatment suitable for causing the fluff present thereon to melt, and to form partially molten clots without affecting the whole mass of said felt. The felt treated in this manner is then subjected to a finishing treatment in a bath containing an aqueous suspension of a synthetic rubber, the resulting product being subjected to drying in a hot air furnace. (FIG. - 1)