Combination yarn

Abstract

The present disclosure provides combination yarns and carpets formed therefrom, in particular combination yarns comprising a first single primarily PET yarn and a second single primarily PTT yarn, wherein at least one of the first single yarn or the second single yarn includes one or more additives which increases dye uptake.

1 . A combination yarn comprising a first single yarn and a second single yarn,
 wherein the first single yarn and the second single yarn are linked to each other,   wherein the first single yarn comprises at least 60% polyethylene terephthalate (PET),   wherein the second single yarn comprises at least 60% polytrimethylene terephthalate (PTT), and   wherein at least one of the first single yarn and the second single yarn includes one or more additives that increase dye uptake such that the color strength of the at least one of the first single yarn and the second single yarn is increased when compared to the same first single yarn and/or the same second single yarn which does not include the one or more additives.   
     
     
         2 . The combination yarn according to  claim 1 , wherein the first single yarn includes the one or more additives, and wherein the color strength of the first single yarn is within 20% or within 10% of the color strength of the second single yarn when both yarns are subjected to the same dyeing conditions. 
     
     
         3 .- 8 . (canceled) 
     
     
         9 . The combination yarn of  claim 1 , wherein the second single yarn includes the one or more additives, and wherein the color strength of the second single yarn is at least 10% or at least 20% greater than the color strength of the first single yarn when both yarns are subjected to the same dyeing conditions. 
     
     
         10 . The combination yarn of  claim 1 , wherein the one or more additives includes polybutylene terephthalate (PBT), at least one ester modifier, or combinations thereof. 
     
     
         11 . The combination yarn of  claim 10 , wherein the one or more additives includes polybutylene terephthalate (PBT). 
     
     
         12 . The combination yarn of  claim 10 , wherein the one or more additives includes at least one ester modifier. 
     
     
         13 . The combination yarn of  claim 12 , wherein the ester modifier comprises a copolymer formed by polymerization of a mixture comprising terephthalic acid or esters thereof, at least one dicarboxylic acid monomer, and at least one diol monomer. 
     
     
         14 . The combination yarn of  claim 12 , wherein the ester modifier comprises a copolymer formed by polymerization of a mixture comprising terephthalic acid or esters thereof, at least one diol monomer, and at least one polyalkylene glycol. 
     
     
         15 . The combination yarn of  claim 12 , wherein the ester modifier is selected from the group consisting of ortho-phthalic acid, isophthalic acid, or esters thereof. 
     
     
         16 . The combination yarn of  claim 1 , wherein the first single yarn comprises at least 75% PET. 
     
     
         17 . The combination yarn of  claim 1 , wherein the second single yarn comprises at least 75% PTT. 
     
     
         18 . (canceled) 
     
     
         19 . The combination yarn of  claim 1 , wherein the first single yarn and/or the second single yarn is a bulked continuous filament yarn. 
     
     
         20 . The combination yarn of  claim 1 , wherein the first single yarn and the second single yarn are plied to each other. 
     
     
         21 . The combination yarn of  claim 1 , wherein the combination yarn is heat set. 
     
     
         22 . The combination yarn of  claim 1 , wherein the weight ratio of PET to PTT in the combination yarn is 1:1 to 1:4. 
     
     
         23 . The use of the combination yarn of  claim 1 , in the manufacture of a carpet, preferably a tufted carpet. 
     
     
         24 . (canceled) 
     
     
         25 . A tufted carpet comprising a pile yarn providing the pile of the carpet, the pile yarn being a combination yarn of  claim 1 . 
     
     
         26 . A combination yarn comprising a first single yarn and a second single yarn,
 wherein the first single yarn and the second single yarn are linked to each other,   wherein the first single yarn comprises at least 75% PET and an additive that includes at least one ester modifier,   wherein the second single yarn comprises at least 75% PTT and does not include any additives that increase dye uptake, and   wherein the color strength of the first single yarn is within 10% of the color strength of the second single yarn when both yarns are subject to the same dyeing conditions.   
     
     
         27 . A combination yarn comprising a first single yarn and a second single yarn,
 wherein the first single yarn and the second single yarn are linked to each other,   wherein the first single yarn comprising at least 75% PET and does not include any additives that increase dye uptake,   wherein the second single yarn comprises at least 75% PTT and an additive that includes PBT and at least one ester modifier, and   wherein the color strength of the second single yarn is at least 20% greater than the color strength of the first single yarn when both yarns are subject to the same dyeing conditions.   
     
     
         28 . A combination yarn comprising a first single yarn and a second single yarn,
 wherein the first single yarn and the second single yarn are linked to each other,   wherein the first single yarn comprises at least 75% PET,   wherein the second single yarn comprises at least 95% PTT,   wherein both the first single yarn and the second single yarn further comprise an additive that includes PBT, at least one ester modifier, or combinations thereof, and   wherein the color strength of the second single yarn is at least 20% greater than the color strength of the first single yarn when both yarns are subject to the same dyeing conditions.