Reinforcing textile structure for composite materials

Abstract

A reinforcing textile complex for composite materials, comprising a stack of textile layers with a view to their impregnation by a polymer resin, the including complex comprising: an assembly of weft threads ( 2 ); an assembly of warp threads ( 3, 4 ) associated in pairs, each pair comprising two threads of different type, at least one of which ( 3 ) is based on high toughness threads, the two threads of a given pair being woven with the weft threads in a “leno” weave.

1 - 11 . (canceled) 
     
     
         12 . A textile reinforcement complex for composite materials, comprising:
 a stack of textile layers with a view to their impregnation by a polymer resin,   the stack comprising an intermediate layer ( 1 ) comprising:
 an assembly of weft yarns ( 2 ); and 
 an assembly of warp yarns ( 3 ,  4 ) associated in pairs, each pair comprising two yarns of different type, one ( 3 ) at least of which is based on high-tenacity yarns, the two yarns of a same pair being woven with the weft yarns in a “leno” weave, 
   wherein said intermediate layer ( 1 ) has a draining role within the complex.   
     
     
         13 . The complex of  claim 12 , wherein the weft yarns ( 2 ) of the intermediate layer ( 1 ) are based on high-tenacity yarns. 
     
     
         14 . The complex of  claim 12 , wherein:
 the warp yarns ( 3 ,  4 ) comprise warp yarns ( 3 ) of a first type and warp yarns ( 4 ) of a second type; and   the warp yarns ( 3 ) of the first type have a higher count than the warp yarns ( 4 ) of the second type.   
     
     
         15 . The complex of  claim 14 , wherein the warp yarns ( 4 ) of the second type are based on organic synthetic yarns. 
     
     
         16 . The complex of  claim 14 , wherein the warp yarns ( 4 ) of the second type are based on high-tenacity yarns. 
     
     
         17 . The complex of  claim 12 , wherein the mass per unit area of the weft yarns ( 2 ) of the intermediate layer is substantially equal to the mass per unit area of the warp yarns ( 3 ,  4 ). 
     
     
         18 . The complex of  claim 12 , wherein:
 the warp yarns ( 3 ,  4 ) comprise warp yarns ( 3 ) of a first type and warp yarns ( 4 ) of a second type;   a mass per unit area of the warp yarns ( 3 ) of the first type is more than three times greater than that of the warp yarns ( 4 ) of the second type.   
     
     
         19 . The complex of  claim 12 , wherein:
 the warp yarns ( 3 ,  4 ) comprise warp yarns ( 3 ) of a first type and warp yarns ( 4 ) of a second type;   a mass per unit area of the warp yarns ( 3 ) of the first type is more than four times greater than that of the warp yarns ( 4 ) of the second type.   
     
     
         20 . The complex of  claim 12 , wherein the gap between at least one of the weft or the warp yarns is between two and three times a width of a single weft yarn. 
     
     
         21 . The complex of  claim 12 , wherein the gap between at least one of the weft or warp yarns is greater than four times a width of a single weft yarn. 
     
     
         22 . The complex of  claim 12 , further comprising at least one layer formed by a mat of fibers, in contact with the intermediate layer. 
     
     
         23 . The complex of  claim 22 , wherein the layer formed by the mat of fibers is made of a material identical to that of the reinforcement layers.