Tire grade high tenacity and modulus recycle nylon 6.6 yarn and production method thereof

Abstract

A tire grade oiled and non-oiled nylon 6.6 drawn and undrawn scrap yarns is converted to a recycled nylon 6.6 pellet. The recycled nylon 6.6 pellet is used with virgin nylon 6.6 pellet in a different ratio to produce tire grade recycled nylon 6.6 yarn.

1 . A tire grade nylon 6.6 mono- and/or multi filament yarn comprising:
 at least 10% recycled nylon 6.6 pellet, wherein   the nylon 6.6 filament yarn has at least 8.0 gpd tenacity according to ASTM-D 885.   
     
     
         2 . The tire grade filament yarn according to  claim 1  further comprising 20% recycled nylon 6.6. 
     
     
         3 . The tire grade filament yarn according to  claim 1 , further comprising at least 1.25 gpd 4% SASE according to ASTM-D 885. 
     
     
         4 . A manufacturing method of a tire grade filament yarn according to  claim 1  further comprising the steps of:
 preparing recycled nylon 6.6 pellet by
 cutting of tire grade oiled and/or non-oiled drawn and/or undrawn nylon 6.6 fiber scraps including mono- and/or multi-filament yarn into 3-5 cm to get nylon 6.6 chopped fibers, 
 feeding to an extruder that has minimum 250° C. and maximum 290° C. in 6 zones to get the molten nylon 6.6 polymer from the scrap yarns, 
 cooling of strands, 
 cutting in a size between 300 to 500 pellet in 10 gram which is shaped as a pellet form, wherein the recycled nylon 6.6 pellet has a maximum 0.05% finish oil in it, 
 
 preparing a virgin nylon 6.6 pellet 
 mixing the virgin nylon 6.6 pellet and the recycled nylon 6.6 pellet.