Sports device for sliding on surfaces

Abstract

A sports equipment (1) for sliding on surfaces having a multi-layered structure comprising a core layer (2) and at least one further layer (3) facing the surface in use, the core layer (2) extending essentially along an entire length of the sports equipment (1) and comprising a matrix material (4) and at least one layer (5) of fibres, wherein the core layer (2) has a central region (6) arranged essentially centrally along the length of the sports equipment (1), with the matrix material (4) being interspersed with the at least one layer (5) essentially along the entire central region (6), and the matrix material (4) is a mineral construction material such as concrete, with the layer (5) of fibres exhibiting pre-tensioning.

1 . A sports equipment ( 1 ) for sliding on surfaces having a multi-layered structure comprising a core layer ( 2 ) and at least one further layer ( 3 ) facing the surface in use, the core layer ( 2 ) extending essentially along an entire length of the sports equipment ( 1 ) and comprising a matrix material ( 4 ) and at least one layer ( 5 ) of fibres,
 characterized in that   the core layer ( 2 ) has a central region ( 6 ) arranged essentially centrally along the length of the sports equipment ( 1 ), with the matrix material ( 4 ) being interspersed with the at least one layer ( 5 ) essentially along the entire central region ( 6 ), and the matrix material ( 4 ) is a mineral construction material such as concrete, with the layer ( 5 ) of fibres exhibiting pre-tensioning.   
     
     
         2 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the central region ( 6 ) extends essentially along an entire length of the sports equipment ( 1 ). 
     
     
         3 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the core layer ( 2 ) comprises one area each on both sides adjacent to the central region ( 6 ), the area being made of a material which is different from the central region ( 6 ). 
     
     
         4 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the at least one layer ( 5 ) of fibres is pre-tensioned in a longitudinal direction (L) of the core layer ( 2 ). 
     
     
         5 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the at least one layer ( 5 ) of fibres is pre-tensioned in a transverse direction (Q) of the core layer ( 2 ). 
     
     
         6 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the pre-tensioning of the at least one layer ( 5 ) of fibres varies along a longitudinal direction (L) and/or a transverse direction (Q) of the core layer. 
     
     
         7 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the layer ( 5 ) of fibres comprises synthetic fibres, glass fibres, basalt fibres, aramid fibres, carbon fibres and/or natural fibres such as bamboo fibres. 
     
     
         8 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the matrix material ( 4 ) is a concrete with aggregate grains which have a maximum diameter of 4 mm. 
     
     
         9 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the matrix material ( 4 ) is interspersed with several layers ( 5 ) of fibres, and at least two layers ( 5 ) exhibit pre-tensioning. 
     
     
         10 . The sports equipment ( 1 ) according to  claim 9 , characterized in that the at least two pre-tensioned layers ( 5 ) have pre-tensioning directions that are different from each other and/or are pre-tensioned to different degrees. 
     
     
         11 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the sports equipment ( 1 ) is a ski or a snowboard. 
     
     
         12 . The sports equipment ( 1 ) according to  claim 11 , characterized in that at least one ski binding or one snowboard binding is arranged in the area of the ski or snowboard in which the central region ( 6 ) of the core layer ( 2 ) is located. 
     
     
         13 . The sports equipment ( 1 ) according to  claim 1 , characterized in that the pre-tensioning is selected such that the pre-tensioning of the fibres is more than 0% and up to 60% of the breaking strength of the fibres.