Tubular protective sleeve

A method for the manufacture of tubular protective sleeves comprises the steps of providing a warp knitted tissue of filaments of three components using a Raschel type loom; and shaping the tissue so that the longitudinal edges of the tissue converge towards one another and overlap, thus defining a tubular shape, the first component comprising monofilaments and / or multifilaments of a first polymer, the third component comprising an electrical conductive material, said components being distributed throughout the thickness of the tissue such that the first is present throughout the thickness, the second throughout the thickness in respect to a median plane of the tissue, the third component extends from one side of the tissue to the interior of the tissue without reaching the opposite side, the minimum weight percentages being 7% for the first, 10% for the second, 40% for the third.