Multilayer textile article with an inner heating layer made of an electrified fabric, and respective manufacturing process

A process for the manufacture of a heating multilayer textile article including in its multilayer structure at least one heating layer which incorporates an electrical resistance adapted to be powered, by a mains power supply, with an electric current to generate heat, comprising at least the following steps:

• manufacturing said heating layer in form of a fabric which incorporates in its textile structure, as electrical resistance, an electrically conductive yarn or thread,
• wherein said fabric constituting said heating layer is manufactured with a warp knitting machine or loom of a “crochet” type, using said conductive yarn, as effect yarn, to realize in the fabric a design of the electrical resistance according to a continuous serpentine shape or a similar form in which the conductive yarn runs and extends both in a warp direction and in a weft direction of the knitted fabric, and
• wherein said continuous serpentine form is defined by a plurality of first portions extending, in the warp direction, across a plurality of weft yarns, and by a plurality of second portions extending, in the weft direction, across a plurality of warp yarns of the knitted fabric manufactured by means of the warp knitting machine;
• and
• associating and joining said heating layer, formed by said fabric manufactured with said machine or loom of the “crochet” type, with other layers so as to form the final multilayer textile article;
• wherein said yarn, integrated in said textile heating layer and constituting said electrical resistance, is adapted to be powered and fed by the mains power supply via an electrical cable wherein the electrical cable is directly connected at one end with said yarn, without requesting provision of an electrode or a conductive band wherein the electrode or the conductive band extends laterally along one edge or an opposite edge of the fabric, and
• wherein in a connection between said electrical cable and said yarn a conductive cable of the electrical cable is inserted into a conductive fiber of the yarn.