Cord

Abstract

A cord consisting of a core and a sheath is provided, whereby the core contains high-modulus fibres embedded in a matrix and is at least predominantly ensheathed with fibres that form the sheath.

1 . A cord consisting of a core and a sheath, whereby the core contains high-modulus fibres embedded in a matrix and is at least predominantly ensheathed with fibres that form the sheath.  
     
     
         2 . The cord according to  claim 1 , wherein the fibres forming the sheath are at least one multifilament yarn that is wrapped around the core.  
     
     
         3 . The cord according to  claim 1 , wherein the core matrix is a thermoplastic.  
     
     
         4 . The cord according to  claim 3 , wherein the core matrix is a thermoplastic that has a melting point or a melting point range between 100 and 420° C.  
     
     
         5 . The cord according to  claim 4 , wherein the core matrix is a thermoplastic that has a melting point or a melting point range between 200 and 230° C.  
     
     
         6 . The cord according to  claim 3 , wherein the core matrix is a polyamide.  
     
     
         7 . The cord according to  claim 1 , wherein the core contains 15 to 50 vol. % of matrix, with respect to core without sheath.  
     
     
         8 . The cord according to  claim 1 , wherein the high-modulus fibres in the core have a modulus of 200 to 550 GPa.  
     
     
         9 . The cord according to  claim 8 , wherein the high-modulus fibres in the core have a modulus of 200 to 350 GPa.  
     
     
         10 . The cord according to  claim 1 , wherein the multifilament yarn of the sheath has a modulus of 70 to 150 GPa.  
     
     
         11 . The cord according to  claim 1 , wherein the high-modulus fibres in the core are carbon fibres.  
     
     
         12 . The cord according to  claim 1 , wherein the high-modulus fibers in the core have finite length.  
     
     
         13 . The cord according to  claim 12 , wherein the high-modulus fibres in the core are stretch-broken high-modulus fibres.  
     
     
         14 . The cord according to  claim 12 , wherein the high-modulus fibres in the core show an average length of 70 to 170 mm.  
     
     
         15 . The cord according to  claim 12 , wherein the high-modulus fibres in the core show varying lengths in the range of 40 to 230 mm.  
     
     
         16 . The cord according to  claim 1 , wherein the multifilament yarn of the sheath is an aramid yarn.  
     
     
         17 . A method of manufacturing of fibre-reinforced elastomeric materials, the method comprising providing a cord according to  claim 1 .  
     
     
         18 . A V-belt containing at least one cord according to  claim 1 .  
     
     
         19 . A toothed belt containing at least one cord according to  claim 1 .  
     
     
         20 . The cord according to  claim 3 , wherein the core matrix is a thermoplastic that has a melting point or a melting point range between 180 and 260° C.  
     
     
         21 . The cord according to  claim 6 , wherein the polyamide is chosen from the group consisting of PA 4, PA 4.6, PA 6, PA 6.6, PA 6.10, PA 10 or PA 12.  
     
     
         22 . The cord according to  claim 9 , wherein the high-modulus fibres in the core have a modulus of 200 to 250 GPa.  
     
     
         23 . The cord according to  claim 10 , wherein the multifilament yarn of the sheath has a modulus of 70 to 120 GPa.