Process for obtaining a composite textile structure based on nonwoven fibrous sheets

A process for continuously producing a multilayer composite textile structure having a longitudinal dimension and a weft dimension, comprising the steps of:

• providing a continuous supply of first and second nonwoven fibrous sheets, the elementary fibers of which are arranged substantially lying in the longitudinal direction of the textile structure;
• forming and continuously supplying a reinforcing sheet consisting of continuous yarns or filaments each extending only in the weft direction of the textile structure, said yarns or filaments being spaced from one another by a distance smaller than a length of the elementary fibers of each nonwoven fibrous sheet;
• providing junction means downstream from the continuous supply of nonwoven fibrous sheets and immediately downstream from the continuous supply of reinforcing sheet, to sandwich said reinforcing sheet between said first and second nonwoven fibrous sheets;
• and
• bonding said first and second nonwoven fibrous sheets together through said reinforcing sheet by subjecting said nonwoven fibrous sheets to a treatment which forces portions of fibers in said first and second nonwoven fibrous sheets to extend through said reinforcing sheet and implant in said second and first nonwoven fibrous sheets, respectively.