Synthetic turf with shock absorption layer

Abstract

A synthetic turf surface including a synthetic grass carpet having a flexible base sheet, and a shock absorbing pad, wherein the shock absorbing pad includes a non-crosslinked polyolefin foam is shown and described. The foam may be recyclable, as it is non-crosslinked.

1 . A synthetic turf surface comprising:
 a. a synthetic grass carpet having a flexible base sheet, and   b. a shock absorbing pad, wherein the shock absorbing pad comprises a non-crosslinked polyolefin foam.   
     
     
         2 . The synthetic turf surface of  claim 1 , wherein the foam thickness is between 8 and 30 mm. 
     
     
         3 . The synthetic turf surface of  claim 1 , wherein the foam density is between 20 and 600 kg/mm 3 . 
     
     
         4 . The synthetic turf surface of  claim 3 , wherein the foam density is between 30 and 150 kg/mm 3 . 
     
     
         5 . The synthetic turf surface of  claim 1 , wherein the foam has a cell size of between 0.2 and 3 mm. 
     
     
         6 . The synthetic turf surface of  claim 1 , wherein the polyolefin foam comprises a polyethylene foam. 
     
     
         7 . The synthetic turf surface of  claim 6 , wherein the polyethylene has a density of 0.865 and 0.96 g/cc. 
     
     
         8 . The synthetic turf surface of  claim 1 , wherein the turf has a vertical ball rebound of 0.60 to 1 m, as measured in accordance with FIFA regulations. 
     
     
         9 . The synthetic turf surface of  claim 1 , wherein the turf has a shock absorption of 55% to 70% as measured in accordance with FIFA regulations. 
     
     
         10 . The synthetic turf surface of  claim 1 , wherein the turf has a vertical deformation of 4 mm to 9 mm as measured in accordance with FIFA regulations. 
     
     
         11 . The synthetic turf surface of  claim 1 , wherein the polyolefin foam comprises at least two layers of foam.