Carpet in synthetic grass and method of making of said carpet in synthetic grass

Abstract

A carpet in synthetic grass of an entirely synthetic or hybrid type including a support extending mainly along a plane and defining an upper face and a lower face opposite the upper face, a plurality of synthetic grass threads constraint to the support to define fixing portions protruding from the lower face, glue spread on the fixing portions, a geotextile membrane in non-woven fabric arranged in correspondence with the lower face to cover the support on that side and in contact with the glue on the fixing portions, in which the geotextile membrane is included in the carpet in percentages between 0.5% and 3.5% with respect to the total weight of the carpet.

1 . A carpet in synthetic grass of an entirely synthetic or hybrid type comprising:
 a support extending mainly along a plane and defining an upper face and a lower face opposite to said upper face,   a plurality of threads of synthetic grass constraint to said support to define fixing portions protruding from said lower face,   glue spread on said portions of fastening,   a geotextile membrane in non-woven fabric arranged at said lower face to cover said support on that side and in contact with said glue on said fixing portions,   wherein said geotextile membrane is comprised in said carpet in percentages between 0.5% and 3.5% with respect to the total weight of said carpet.   
     
     
         2 . A method of making a carpet in synthetic grass by means of an apparatus,
 said carpet comprising at least
 a support extending mainly along a plane and defining an upper face and a lower face opposite to said upper face, 
 a plurality of threads of synthetic grass constraint to said support to define fixing portions protruding from said lower face, 
 glue spread on said fixing portions, 
 a geotextile membrane in non-woven fabric arranged in correspondence with said lower face to cover said support in that side and in contact with said glue said fixing portions, 
   
       and said method comprising:
 constraining said wires on said support to define said fixing portions, 
 spreading said glue exclusively on said fixing portions, 
 splicing, after said spreading, said geotextile membrane with said glue on said fixing portions to couple said membrane with said support along said face, 
 heating said carpet to temperatures equal to at least 100° C. after said spreading step, 
 pressing exclusively said fixing portions towards said support without coming into contact with at least said lower face, 
 
       and
 cooling said carpet to maximum temperatures equal to 10° C. after said pressing. 
 
     
     
         3 . The method according to  claim 2 , wherein in said phase of constraint of said threads are sewn on said support such that said threads are arranged in a U around said portions of support, the central portion of said threads protruding from said lower face of said support defining said fixing portions. 
     
     
         4 . The method according to  claim 3 , wherein said apparatus comprises gluing means configured to realize said step of spreading and wherein said glue is a thermoplastic polymer and is deposited on said support in liquid form. 
     
     
         5 . The method according to  claim 4 , wherein said gluing means comprise at least one container including said glue in solid granular form and deposition means configured to withdraw said thermoplastic glue in the form solid granular from said container and to heat it bringing it to fusion. 
     
     
         6 . The method according to  claim 5 , wherein said deposition means are constituted by a roller placed not in direct contact with said lower face of said support, but in contact with said fixing portions protruding from said lower face, said deposition means being also oscillating at least along a predetermined direction to realize a brush effect on said fixing portions. 
     
     
         7 . A The method according to  claim 5 , wherein said apparatus comprises direction means adapted to define a sliding trajectory for said carpet along which said support slides in said apparatus and wherein said deposition means are spaced from said sliding trajectory by at least 1 mm. 
     
     
         8 . A The method according to  claim 2 , wherein said apparatus comprises heating means arranged along said sliding trajectory and defining a heating means capable of heating said carpet to realize said heating phase, and wherein in said pressing phase a pressure is exerted in opposition to said heating surface. 
     
     
         9 . The method according to  claim 8 , wherein said apparatus comprises pressure means arranged along said sliding trajectory pressing said fixing portions towards said support in contrast to said heating surface and configured such that none of said pressure means and said heating surface comes into contact with said support. 
     
     
         10 . A The method according to  claim 2 , wherein said apparatus comprises cooling means arranged along said sliding trajectory and defining a heating surface capable of cooling said belt to realize said cooling phase, and in which said cooling means are water-cooled to a maximum temperature equal to 5° C. 
     
     
         11 . The method according to  claim 6 , wherein said apparatus comprises direction means adapted to define a sliding trajectory for said carpet along which said support slides in said apparatus and wherein said deposition means are spaced from said sliding trajectory by at least 1 mm. 
     
     
         12 . The method according to  claim 11 , wherein said apparatus comprises heating means arranged along said sliding trajectory and defining a heating means capable of heating said carpet to realize said heating phase, and wherein in said pressing phase a pressure is exerted in opposition to said heating surface. 
     
     
         13 . The method according to  claim 12 , wherein said apparatus comprises pressure means arranged along said sliding trajectory pressing said fixing portions towards said support in contrast to said heating surface and configured such that none of said pressure means and said heating surface comes into contact with said support.