Artificial grass

Abstract

Artificial grass tufted from slit film or monofilaments prepared with a polyethylene prepared with a bistetrahydroindenyl or bisindenyl metallocene catalyst complex having (a) a density in the range of 0.910 to 0.937 g/cm 3 as determined by ISO 1183 at a temperature of 23° C. and (b) a melt index MI2 in the range of 0.5 to 5 g/10 min as determined by ISO 1133/D at a temperature of 190° C. and at a load of 2.16 kg, wherein said polyethylene has a g rheo of less than 0.9 or an LCBI of greater than 0.08, and the polyethylene has a Vicat Softening Temperature T v according to the following equation: T v >41234 d 2 +77500 d−36295 wherein T v is the Vicat Softening Temperature in ° C. and d is the density of the polyethylene in g/cm 3 .

1 . Artificial grass tufted from slit film or monofilaments prepared with a polyethylene prepared with a bistetrahydroindenyl or bisindenyl metallocene catalyst complex having (a) a density in the range of 0.910 to 0.937 g/cm3 as determined by ISO 1183 at a temperature of 23° C. and (b) a melt index MI2 in the range of 0.5 to 5 g/10 min as determined by ISO 1133/D at a temperature of 190° C. and at a load of 2.16 kg,
 wherein said polyethylene has a grheo of less than 0.9 or an LCBI of greater than 0.08, 
 and wherein the polyethylene has a Vicat Softening Temperature Tv, measured according to ISO 306 conditions A120, according to the following equation:
     Tv> 41234  d   2 +77500  d− 36295 
 
 wherein Tv is the Vicat Softening Temperature in ° C. and d is the density of the polyethylene in g/cm3. 
 
     
     
         2 . Artificial grass according to  claim 1  wherein the polyethylene has a g rheo  of less than 0.85 or an LCBI of greater than 0.13. 
     
     
         3 . Artificial grass according to  claim 1  wherein the polyethylene has a MI2 of 0.7 to 3.5 g/10 min. 
     
     
         4 . Artificial grass according to  claim 1  wherein the polyethylene has a density of 0.910 to 0.935 g/cm 3 . 
     
     
         5 . Artificial grass according to  claim 1  wherein the rheological horizontal activation energy of the polyethylene at a frequency of 1 s −1  is greater than 40 kJ/mol and at a frequency of 100 s −1  is less than 40 kJ/mol. 
     
     
         6 . Artificial grass according to  claim 1  wherein the rheological horizontal activation energy of the polyethylene at a frequency of 1 s  −1  is greater than 45 kJ/mol. 
     
     
         7 . Artificial grass according to  claim 1  wherein the polyethylene is a copolymer of ethylene and 1-hexene comonomer. 
     
     
         8 . Artificial grass according to  claim 1  wherein the polyethylene has a 1-hexene content of less than 10 wt %. 
     
     
         9 . Artificial grass according to  claim 1  being in a stretched form. 
     
     
         10 . Artificial grass according to  claim 1  having a draw ratio in the range 1:3 to 1:10 and preferably 1:4 to 1:10. 
     
     
         11 . The artificial grass according to  claim 1  wherein the grass has a durability of at least 60,000 cycles as measured on a Lisport® machine.