Multi-layer fabric with Bi-nodal MD yarn

Abstract

Monofilament yarn for use in an industrial textile, in which the yarn has a bi-nodal cross section, and an industrial fabric, preferably a paper making clothing, which includes at least one monofilament yarn with a bi-nodal cross section. Further, a method of making an industrial fabric having a monofilament yarn with a bi-nodal cross section includes extruding a single filament yarn through a die to produce a monofilament yarn having a bi-nodal cross section. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

1 . A monofilament yarn for use in an industrial textile, wherein said yarn comprises a bi-nodal cross section.  
   
   
       2 . The monofilament yarn according to  claim 1 , characterized in that said bi-nodal yarn comprises two nodes which are immediately adjacent.  
   
   
       3 . The monofilament yarn according to  claim 1 , characterized in that said bi-nodal yarn comprises two nodes which are separated by an integral linking bridge.  
   
   
       4 . The monofilament yarn according to  claim 1 , characterized in that said bi-nodal yarn has an aspect ratio of maximum width to maximum height greater than 1, preferably ranging from 1.1 to 1.7, more preferably from 1.3 to 1.6 and most preferably around 1.4.  
   
   
       5 . The monofilament yarn according to  claim 1 , characterized in that said bi-nodal yarn is symmetrical or non-symmetrical in respect to its longitudinal axis.  
   
   
       6 . The monofilament yarn according to  claim 1 , characterized in that said nodes are flat at one side of the yarn.  
   
   
       7 . The monofilament yarn according to  claim 1 , characterized in that said bi-nodal yarn is made of a polymeric material, wherein the polymeric material preferably comprise alone or in combination PA, PE, PET.  
   
   
       8 . An industrial fabric, preferably a paper making clothing, comprising at least one monofilament yarn according to  claim 1 .  
   
   
       9 . The industrial fabric according to  claim 8 , characterized in that said bi-nodal yarns are warp yarns and/or weft yarns of the fabric.  
   
   
       10 . The industrial fabric according to  claim 8 , characterized in that said fabric is a multi layer fabric comprising bi-nodal yarns on the paper side layer and/or wear side layer and/or on a middle layer of the fabric.  
   
   
       11 . The industrial fabric according to  claim 8 , characterized in that all paper side layer warp yarns are provided with bi-nodal cross section.  
   
   
       12 . The industrial fabric according to  claim 8 , characterized in that all wear side warp yarns are provided with bi-nodal cross section.  
   
   
       13 . The industrial fabric according to  claim 8 , characterized in that at least some of the bi-nodal yarns provided on the paper side layer having a flat side facing to the paper side.  
   
   
       14 . The industrial fabric according to  claim 8 , characterized in that at least some of the bi-nodal yarns provided on the wear side layer having a flat side facing to the wear side.  
   
   
       15 . The industrial fabric according to  claim 8 , characterized in that the bi-nodal yarns provided on the paper side layer have the same aspect ratio like the bi-nodal yarns provided on the wear side layer.  
   
   
       16 . The industrial fabric according to  claim 8 , characterized in that at least some bi-nodal yarns provided on the paper side layer having a smaller total cross sectional area than the bi-nodal yarns provided on the wear side layer.  
   
   
       17 . The industrial fabric according to  claim 8 , characterized in that the fabric is a forming fabric or a dryer fabric or a base cloth of a press felt or smoothing belt or transfer belt.  
   
   
       18 . A method of making an industrial fabric comprising extruding a single filament yarn through a die to produce a monofilament yarn having a bi-nodal cross section.