Polyester elastic conjugated yarn, preparation method thereof, and yarn comprising the same

Abstract

The invention discloses a method for preparing a polyester elastic conjugated yarn, comprising: forming a polyester yarn by using a polyester fiber as a raw material through a false twisting process; forming a thermoplastic polyester elastomer yarn by using a thermoplastic polyester elastomer (TPEE) as a raw material through an unwinding process; and combining the polyester yarn and the thermoplastic polyester elastomer yarn in a fiber blending process to obtain the polyester elastic conjugated yarn. The invention further discloses a polyester elastic conjugated yarn, and a yarn and a fabric comprising the polyester elastic conjugated yarn.

What is claimed is: 
     
         1 . A method for preparing a polyester elastic conjugated yarn, comprising:
 forming a polyester yarn by using a polyester fiber as a raw material through a false twisting process;   forming a thermoplastic polyester elastomer yarn by using a thermoplastic polyester elastomer (TPEE) as a raw material through an unwinding process; and   combining the polyester yarn and the thermoplastic polyester elastomer yarn in a? fiber blending process to obtain the polyester elastic conjugated yarn.   
     
     
         2 . The method according to  claim 1 , wherein the polyester fiber is a polyethylene terephthalate (PET) fiber, a polybutylene terephthalate (PBT) fiber, a polytrimethylene terephthalate (PTT) fiber, a cationic-dyeable polyester (CD polyester) fiber or a recycled polyester fiber. 
     
     
         3 . The method according to  claim 1 , wherein the polyester fiber is a sheath-core (S/C) fiber, a segment pie fiber or a sea & islands (S/I) fiber. 
     
     
         4 . The method according to  claim 1 , wherein the thermoplastic polyester elastomer is a PBT type polyester elastomer. 
     
     
         5 . The method according to  claim 1 , wherein the thermoplastic polyester elastomer is prepared by a non-recycling process or a recycling process. 
     
     
         6 . The method according to  claim 5 , wherein the thermoplastic polyester elastomer is prepared by a mechanical recycling process or a chemical recycling process. 
     
     
         7 . The method according to  claim 1 , wherein the thermoplastic polyester elastomer yarn is monofilament or multifilament. 
     
     
         8 . The method according to  claim 7 , wherein the denier per filament (dpf) of the thermoplastic polyester elastomer yarn is below or equal to 100 Denier (De). 
     
     
         9 . The method according to  claim 1 , wherein the drawing ratio of the polyester yarn is different from that of the thermoplastic polyester elastomer yarn. 
     
     
         10 . A polyester elastic conjugated yarn comprising a polyester yarn and a thermoplastic polyester elastomer yarn, wherein the polyester yarn and the thermoplastic polyester elastomer yarn are separated but twist to each other. 
     
     
         11 . The polyester elastic conjugated yarn according to  claim 10 , wherein the polyester yarn is formed by a false twisting process using a polyester fiber as a raw material, the thermoplastic polyester elastomer yarn is formed by an unwinding process using a thermoplastic polyester elastomer (TPEE) as a raw material, and the polyester elastic conjugated yarn is obtained by combining the polyester yarn and the thermoplastic polyester elastomer yarn in a fiber blending process. 
     
     
         12 . The polyester elastic conjugated yarn according to  claim 10 , wherein the polyester fiber is a polyethylene terephthalate (PET) fiber, a polybutylene terephthalate (PBT) fiber, a polytrimethylene terephthalate (PTT) fiber, a cationic-dyeable polyester (CD polyester) fiber or a recycled polyester fiber. 
     
     
         13 . The polyester elastic conjugated yarn according to  claim 10 , wherein the polyester fiber is a sheath-core (S/C) fiber, a segment pie fiber or a sea & islands (S/I) fiber. 
     
     
         14 . The polyester elastic conjugated yarn according to  claim 10 , wherein the thermoplastic polyester elastomer is a PBT-type polyester elastomer. 
     
     
         15 . The polyester elastic conjugated yarn according to  claim 10 , wherein the thermoplastic polyester elastomer is prepared by a non-recycling process or a recycling process. 
     
     
         16 . The polyester elastic conjugated yarn according to  claim 15 , wherein the thermoplastic polyester elastomer is prepared by a mechanical recycling process or a chemical recycling process. 
     
     
         17 . The polyester elastic conjugated yarn according to  claim 10 , wherein the thermoplastic polyester elastomer yarn is monofilament or multifilament. 
     
     
         18 . The polyester elastic conjugated yarn according to  claim 17 , wherein the denier per filament (dpf) of the thermoplastic polyester elastomer yarn is below or equal to 100 Denier (De). 
     
     
         19 . The polyester elastic conjugated yarn according to  claim 10 , wherein the drawing ratio of the polyester yarn is different from that of the thermoplastic polyester elastomer yarn. 
     
     
         20 . A yarn comprising the polyester elastic conjugated yarn according to  claim 10  and other fibers.