PROCESS FOR THE MANUFACTURE OF A COMPOSITE MATERIAL FOR ANTI-VANDALISM PROTECTION, PARTICULARLY FOR SEATS, AND COMPOSITE MATERIAL OBTAINED

摘要

The process for manufacturing a composite material for anti-vandalism protection, in particular for seats, consists in producing a set of three superimposed layers, the intermediate layer of which is a metal anti-vandalism grid and in joining said three layers. outer (3) being a nonwoven (2), the three layers (3, 5, 7) are joined by a simple needling strikes from barbed needles with rounded ends, so that, after needling, the face the outer layer of the first layer is free of metallic threads coming from the second layer, and that the outer face of the third layer has a limited or even zero number of metallic threads coming from the second layer. Needling is carried out using '' needles with a barbed depth less than half the diameter of each of the wires making up the metal grid and more than half the diameter of all or more part of the constituent fibers of the first layer.