Artificial turf wtih improved tuft-lock

Abstract

Embodiments of the present disclosure are directed to stretched filaments comprising a non-functionalized polyolefin and at least one functionalized polymer. The functionalized polymer is a propylene-based plastomer or elastomer having one or more functional groups grafted on the propylene-based plastomer or elastomer. The one or more functional groups is selected from the group consisting of amine groups and imide groups. The at least one functionalized polymer has a DSC melting point from 100° C. to 130° C. When the stretched filament is stretched to a stretch ratio of 5, the stretched filament has a tenacity greater than 0.90 cN/dtex

1 . A stretched filament formed from a blend comprising:
 at least one functionalized polymer, wherein the functionalized polymer is a propylene-based plastomer or elastomer having one or more functional groups grafted on the propylene-based plastomer or elastomer, wherein the one or more functional groups is selected from the group consisting of amine groups and imide groups, wherein the at least one functionalized polymer has a differential scanning calorimetry (DSC) melting point of from 100° C. to 130° C.; and   a non-functionalized polyolefin;   wherein when the stretched filament is stretched to a stretch ratio of 5, the stretched filament has a tenacity greater than 0.90 cN/dtex.   
     
     
         2 . The stretched filament of  claim 1 , wherein the non-functionalized polyolefin comprises a polyethylene having a density (measured according to ASTM D792) of from 0.900 g/cc to 0.950 g/cc and a melt index, I 2 , measured according to ASTM D 1238 (190° C. and 2.16 kg), of from 0.1 g/10 min to 10 g/10 min. 
     
     
         3 . The stretched filament of  claim 1 , wherein the non-functionalized polyolefin comprises a polyethylene having a density (measured according to ASTM D792) of from 0.915 g/cc to 0.940 g/cc and a melt index, I 2 , measured according to ASTM D 1238 (190° C. and 2.16 kg), of from 0.7 g/10 min to 5 g/10 min. 
     
     
         4 . The stretched filament of  claim 2 , wherein the polyethylene has a melt flow ratio, I 10 /I 2 , of from 5 to 14, wherein I 10  is measured according to ASTM D1238 (190° C. and 10 kg). 
     
     
         5 . The stretched filament of  claim 1 , wherein the non-functionalized polyolefin comprises a polypropylene homopolymer. 
     
     
         6 . The stretched filament of  claim 5 , wherein the non-functionalized polyolefin has a melt flow rate (MFR 2 ) of 0.5 g/10 min to 25 g/10 min. 
     
     
         7 . The stretched filament of  claim 5 , wherein the polypropylene homopolymer has a MFR 2  of 0.5 g/10 min to 10 g/10 min. 
     
     
         8 . The stretched filament of  claim 1 , wherein the functionalized polymer has a graft level of from 0.1 wt. % to 3.0 wt. %. 
     
     
         9 . The stretched filament of  claim 1 , wherein the propylene-based plastomer or elastomer is a propylene/ethylene copolymer or a propylene/alpha-olefin copolymer wherein the alpha-olefin is a C 4 -C 20  alpha-olefin. 
     
     
         10 . The stretched filament of  claim 1 , wherein the at least one functionalized polymer has a melt flow rate (MFR 2 ) measured according to ASTM D 1238 (230° C. and 2.16 kg), of from 1 g/10 min to 20 g/10 min. 
     
     
         11 . An artificial turf system comprising:
 a primary backing;   a secondary backing; and   the stretched filament of  claim 1 .