Accessory annular elements for textile machinery and relative manufacturing process

In an annular element adapted to be used as a part for textile machinery, comprising a layer of cross-linked elastomeric composition based on an elastomer selected between nitrile and polyurethane rubber, constituting the outer surface of said annular element, a helically wound textile reinforcement, and a second layer of cross-linked elastomeric composition based on an elastomer selected between nitrile and polyurethane rubber, constituting the inner surface of said annular element, the improvement consisting essentially in that the helically wound textile reinforcement is constituted by a plurality of wound layers of a non-woven fabric of synthetic fibers selected between polyamide and polyester fibers, impregnated by a cross-linked elastomeric composition based on an elastomer selected between nitrile and polyurethane rubber, said non-woven fabric having prior to its impregnation by said elastomeric composition a weight ranging between 10 and 50 g/m.sup.2, said plurality of wound layers of non-woven fabric being also able to constitute the inner surface of said annular element.