Textile ply capable of absorbing sound waves

Abstract

Textile ply formed by weaving yarns sheathed in a thermoplastic substance, said sheathed yarns being spaced apart from one another in both the warp and weft direction so as to form openings referred to as “intersection” openings arranged at the intersections between the warp yarns and weft yarns, said textile ply being intended to enable an absorption of sound waves, characterized in that it comprises in the warp direction and/or in the weft direction a plurality of groups of at least two sheathed yarns that are juxtaposed and that have the same weaving orientation, said yarns of one and the same group being locally spaced apart from one another and forming a plurality of openings referred to as “parallel” openings each comprising a shape and an angular orientation that are different from those of the openings referred to as “intersection” openings.

1 . A textile ply formed by the weaving of yarns coated with a thermoplastic substance, said coated yarns being spaced apart from one another in both the warp and weft direction to form openings referred to as “intersection” openings arranged at the intersections between warp yarns and weft yarns, said textile ply being intended to allow a sound wave absorption, characterized in that it comprises, in the warp and/or in the weft direction, a plurality of groups of at least two juxtaposed coated yarns having a same weaving direction, such yarns of a same group being locally spaced apart from each other and forming a plurality of openings referred to as “parallel” openings, each having a shape and an angular orientation different from those of “intersection” openings. 
     
     
         2 . The textile ply of  claim 1 , characterized in that it comprises in the warp and/or in the weft direction a number of yarns per centimeter in the range between 8 and 22. 
     
     
         3 . The textile ply of  claim 1 , wherein the yarns comprise a core formed by strands made of a material selected from the group comprising polyester, polyamide, polyolefin, acrylic, vinyl, and glass. 
     
     
         4 . The textile ply of  claim 3 , characterized in that the linear mass density of the core of the yarns is in the range between 250 and 1,100 dtex. 
     
     
         5 . The textile ply of  claim 1 , characterized in that the linear mass density of the yarns coated with a thermoplastic substance is in the range between 1,000 and 4,000 dtex. 
     
     
         6 . The textile ply of  claim 1 , characterized in that it has a specific resistance in the range between 100 and 1,100 N.s.m-3. 
     
     
         7 . The textile ply of  claim 1 , characterized in that the thermoplastic substance of the coatings may be made of a material selected from the group comprising polyvinyl chloride (PVC), ethylene vinyl acetate (EVA), silicones, acrylic, and polyurethane. 
     
     
         8 . The textile ply of  claim 1 , characterized in that the thermoplastic substance of the coatings is made of a material of open-cell foam type. 
     
     
         9 . The textile ply of  claim 1 , characterized in that it comprises, on at least one of its surfaces, an added layer of material taking part in the sound wave absorption.