Antistatic core-sheath type polyester ultrafine false-twist textured yarn and method for producing the same, and antistatic water-repellent woven fabric containing the antistatic core-sheath type polyester ultrafine false-twist textured yarn

Abstract

The polyester false-twist textured yarn of the present invention has a sheath part encapsulating an antistatic component, and is not susceptive to deformation of the false-twist, therefore a little fluff in false-twist texturing occurs. Thus, a polyester textile that is excellent also in antistatic performance, while maintaining such performances as soft feeling, warmth-retaining property, water-absorbing property, hygroscopic property that belong to an ultrafine polyester false-twist textured yarn. Further, since it is excellent in heat-resisting properties as compared with conventional polyetheramide-based antistatic agent, the yarn is excellent in wash durability when it is high-pressure dyed and can be suitably used for a textile for use in such applications as school uniform, uniform and dustproof wear for which static charge should be prevented.

1 . An antistatic core-sheath type polyester ultrafine false-twist textured yarn characterized by being a false-twist textured core-sheath type composite filament, wherein:
 the core part of the core-sheath type composite filament is formed from an antistatic polyester composition A containing the following (a) and (b), as an antistatic agent, relative to 100 parts by weight of aromatic polyester,   (a) from 0.2 to 30 parts by weight of polyoxyalkylene-based polyether, and   (b) from 0.05 to 10 parts by weight of an organic ionic compound that is substantially nonreactive with the polyester; and   the sheath part is formed from an aromatic polyester composition B, and   the core-sheath type composite filament satisfies simultaneously the following (1) to (3) conditions:   (1) a single filament fineness of the false-twist textured yarn is 1.6 dtex or less,   (2) a crimp percentage of the false-twist textured yarn is form 3 to 30%, and   (3) a ratio SA:SB of a core part area SA and a sheath part area SB is in the range of from 5:95 to 80:20.   
     
     
         2 . The antistatic core-sheath type polyester ultrafine false-twist textured yarn according to  claim 1 , wherein the aromatic polyester composition B is a polyester composition that comprises a delustering agent in from 0.01 to 10% by weight relative to 100 parts by weight of the aromatic polyester. 
     
     
         3 . The antistatic core-sheath type polyester ultrafine false-twist textured yarn according to  claim 1 , wherein the delustering agent is titanium dioxid. 
     
     
         4 . A method for producing an antistatic core-sheath type polyester ultrafine false-twist textured yarn characterized in that, when melt-spinning a core-sheath type composite filament having a core part that is formed from an antistatic polyester composition A containing the following (a) and (b), as an antistatic agent, relative to 100 parts by weight of aromatic polyester,
 (a) from 0.2 to 30 parts by weight of polyoxyalkylene-based polyether, and   (b) from 0.05 to 10 parts by weight of an organic ionic compound that is substantially nonreactive with the polyester; and a sheath part that is formed from an aromatic polyester composition B,   
       a filament is drawn at a ratio of discharge velocity and drawing velocity at spinning (drawing velocity/discharge velocity, hereinafter it is sometimes abbreviated as draft magnification) in the range of from 150 to less than 800, and is then subjected to false-twist texturing. 
     
     
         5 . The method for producing an antistatic core-sheath type polyester ultrafine false-twist textured yarn according to  claim 4 , wherein the aromatic polyester composition B is a polyester composition that comprises a delustering agent in from 0.01 to 10% by weight relative to 100 parts by weight of the aromatic polyester. 
     
     
         6 . The method for producing an antistatic core-sheath type polyester ultrafine false-twist textured yarn according to  claim 4 , wherein the delustering agent is titanium dioxide. 
     
     
         7 . An antistatic water-repellent woven fabric characterized in that the water-repellant woven fabric is formed by subjecting a woven fabric comprising a core-sheath type polyester false-twist textured yarn to water-repellent processing, wherein the core-sheath type polyester false-twist textured yarn is the antistatic core-sheath type polyester ultrafine false-twist textured yarn as described in  claim 1 . 
     
     
         8 . An antistatic water-repellent woven fabric characterized in that the water-repellant woven fabric is formed by subjecting a woven fabric comprising a core-sheath type polyester false-twist textured yarn to water-repellent processing, wherein the core-sheath type polyester false-twist textured yarn is the antistatic core-sheath type polyester ultrafine false-twist textured yarn as described in  claim 2 . 
     
     
         9 . An antistatic water-repellent woven fabric characterized in that the water-repellant woven fabric is formed by subjecting a woven fabric comprising a core-sheath type polyester false-twist textured yarn to water-repellent processing, wherein the core-sheath type polyester false-twist textured yarn is the antistatic core-sheath type polyester ultrafine false-twist textured yarn as described in  claim 3 .