Artificial turf backing

Abstract

Artificial turf ( 15 ) comprising a primary backing ( 16 ) having a first side ( 52 ) and a second side ( 53 ) and including a first backing layer ( 23 ), a second backing layer ( 24 ), a third backing layer ( 25 ) and a fourth backing layer ( 26 ), a plurality of fibers ( 19 ) sewn or tufted through the primary backing, and a secondary backing on the second side of the primary backing. The first layer may facilitate tufting, the second layer may facilitate dimensional stability, the third layer may facilitate tufted bind and the fourth layer may facilitate seam strength. The fibers may form upstanding ribbons ( 17 ) on the first side of the primary backing and the turf may further comprise an infill layer ( 20 ) disposed between the ribbons. The fibers may form a plurality of back stitches ( 27 ) on the second side of the primary backing and the secondary backing may cover the back stitches and lock in the fibers.

1 . Artificial turf comprising: 
 a primary backing having a first side and a second side and comprising a first backing layer, a second backing layer, a third backing layer, and a fourth backing layer;    a plurality of fibers sewn through said primary backing; and    a secondary backing on said second side of said primary backing.    
     
     
         2 . The artificial turf set forth in  claim 1 , wherein said first layer facilitates tufting, said second layer facilitates dimensional stability, said third layer facilitates tuft bind and said fourth layer facilitates seam strength.  
     
     
         3 . The artificial turf set forth in  claim 1 , wherein said fibers form upstanding ribbons on said first side of said primary backing and further comprising an infill layer disposed between said ribbons.  
     
     
         4 . The artificial turf set forth in  claim 1 , wherein said fibers form a plurality of back stitches on said second side of said primary backing and said secondary backing covers said back stitches and locks in said fibers.  
     
     
         5 . The artificial turf set forth in  claim 1 , wherein said secondary backing is a urethane coating applied to said second side of said primary backing.  
     
     
         6 . The artificial turf set forth in  claim 1 , wherein said fibers form a plurality of rows and columns of ribbons, the distance between each of said rows being substantially the same as the distance between each of said columns.  
     
     
         7 . The artificial turf set forth in  claim 6 , wherein said distance between each of said rows is about ⅜inches.  
     
     
         8 . The artificial turf set forth in  claim 1 , wherein 
 said artificial turf comprises a first panel and a second panel,    said first panel having a first edge and said second panel having a second edge,    said first and second edges sewn together to form a seam, and    further comprising seam tape covering said seam on said second side of said primary backing.    
     
     
         9 . The artificial turf set forth in  claim 1 , wherein said first layer comprises a polypropylene weave.  
     
     
         10 . The artificial turf set forth in  claim 1 , wherein said second layer comprises a polyester core and a nylon skin.  
     
     
         11 . The artificial turf set forth in  claim 1 , wherein said third layer comprises a polypropylene weave.  
     
     
         12 . The artificial turf set forth in  claim 1 , wherein said fourth layer comprises a polypropylene tape warp and a polypropylene spun yarn fill.