Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
  • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
  • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
  • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/08—Melt spinning methods
  • D01D5/098—Melt spinning methods with simultaneous stretching
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
  • D01D5/30—Conjugate filaments; Spinnerette packs therefor
  • D01D5/34—Core-skin structure; Spinnerette packs therefor
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
  • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
  • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
  • D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/04—Blended or other yarns or threads containing components made from different materials
  • D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
  • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
  • D03D15/47—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads multicomponent, e.g. blended yarns or threads
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
  • D03D15/513—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads heat-resistant or fireproof
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
  • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/06—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/02—Moisture-responsive characteristics
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/02—Moisture-responsive characteristics
  • D10B2401/022—Moisture-responsive characteristics hydrophylic
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/04—Heat-responsive characteristics
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/06—Load-responsive characteristics

Definitions

• the present invention relates to a hygroscopic core-sheath composite yarn and fabric.
• Synthetic fibers made of thermoplastic resins such as polyamide and polyester are widely used in clothing and industrial applications because they are excellent in strength, chemical resistance, heat resistance and the like.
• polyamide fiber has excellent hygroscopicity in addition to its unique softness, high tensile strength, color development during dyeing, and high heat resistance, and is widely used for applications such as innerwear and sportswear.
• polyamide fibers are not sufficiently hygroscopic compared to natural fibers such as cotton, and have problems such as stuffiness and stickiness, and are inferior to natural fibers in terms of comfort. .
• Patent Document 1 proposes a method for improving moisture absorption performance by blending and spinning poly (vinyl pyrrolidone) as a hydrophilic polymer in polyamide.
• Patent Document 2 discloses a polyether block amide copolymer, which is a core-sheath composite fiber having a core part and a sheath part, the core part not being exposed on the fiber surface, and whose hard segment is 6-nylon. And a core-sheath composite fiber having a sheath part of 6-nylon resin and having an area ratio of the core part to the sheath part in the fiber cross section of 3/1 to 1/5.
• Patent Document 3 discloses a core-sheath type composite fiber having a thermoplastic resin as a core part and a fiber-forming polyamide resin as a sheath part, and the main component of the thermoplastic resin forming the core part is a polyether ester.
• a core-sheath composite fiber that is arranged in the sheath and exhibits high hygroscopicity is described.
• Patent Document 4 discloses a hygroscopic composite fiber characterized by using polyamide or polyester as a sheath component and a thermoplastic water-absorbing resin made of a crosslinked product of polyethylene oxide as a core component.
• a highly hygroscopic core-sheath composite fiber in which a highly hygroscopic water-insoluble polyethylene oxide-modified product is disposed in the core and polyamide is disposed in the sheath is described.
• Patent Document 1 has moisture absorption / release properties close to those of natural fibers, its performance is not fully satisfactory, and achieving higher moisture absorption / release properties is a problem.
• the core-sheath composite fibers of Patent Documents 2 to 4 have moisture absorption and desorption properties that are equal to or higher than natural fibers, the core component is thermally deteriorated by continuous use of a home-use laundry dryer. There was a problem that the fibers were hardened and the texture of the fabric was hard, and durability and moisture absorption / release performance were lowered.
• the present invention has the following configuration.
• the hygroscopic core sheath wherein the sheath polymer is polyamide, the core polymer is a polyether ester amide copolymer, and the strength retention after dry heat treatment at 150 ° C. for 1 hour is 50% or more.
• Composite yarn
• the core-sheath composite yarn has high moisture absorption performance, excellent comfort exceeding natural fibers, and can maintain soft texture, durability and moisture absorption / release performance even after repeated washing and drying. Can be provided.
• the core-sheath composite yarn of the present invention uses polyamide for the sheath and a polyether ester amide copolymer for the core.
• the polyether ester amide copolymer is a block copolymer having an ether bond, an ester bond and an amide bond in the same molecular chain. More specifically, one or two or more polyamide components (A) selected from lactam, aminocarboxylic acid, diamine and dicarboxylic acid salt, and polyetherester component consisting of dicarboxylic acid and poly (alkylene oxide) glycol ( It is a block copolymer polymer obtained by subjecting B) to a polycondensation reaction.
• A polyamide components selected from lactam, aminocarboxylic acid, diamine and dicarboxylic acid salt, and polyetherester component consisting of dicarboxylic acid and poly (alkylene oxide) glycol
• polyamide component (A) examples include lactams such as ⁇ -caprolactam, dodecanolactam, and undecanolactam, ⁇ -aminocarboxylic acids such as aminocaproic acid, 11-aminoundecanoic acid, and 12-aminododecanoic acid, nylon 66, and nylon There are nylon salts of diamine-dicarboxylic acid which is a precursor such as 610 and nylon 612, and a preferable polyamide-forming component is ⁇ -caprolactam.
• the polyether ester component (B) is composed of a dicarboxylic acid having 4 to 20 carbon atoms and poly (alkylene oxide) glycol.
• the dicarboxylic acid having 4 to 20 carbon atoms include aliphatic dicarboxylic acids such as succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, sebacic acid, and dodecadic acid, terephthalic acid, isophthalic acid, and 2,6-naphthalenedicarboxylic acid.
• An aromatic dicarboxylic acid such as alicyclic dicarboxylic acid such as 1,4-cyclohexanedicarboxylic acid can be used, and one or a mixture of two or more can be used.
• Preferred dicarboxylic acids are adipic acid, sebacic acid, dodecadiic acid, terephthalic acid and isophthalic acid.
• poly (alkylene oxide) glycols include polyethylene glycol, poly (1,2- and 1,3-propylene oxide) glycol, poly (tetramethylene oxide) glycol, poly (hexamethylene oxide) glycol, and the like. Polyethylene glycol having good moisture absorption performance is preferred.
• the number average molecular weight of the poly (alkylene oxide) glycol is preferably 300 to 3,000, more preferably 500 to 2,000. It is preferable for the molecular weight to be 300 or more because the fiber is less likely to splash out of the system during the polycondensation reaction and the moisture absorption performance is stable. Moreover, it is preferable that it is 3000 or less because poly (alkylene oxide) glycol is uniformly dispersed in the polymer and good moisture absorption performance is obtained.
• the constituent ratio of the polyether ester component (B) in the entire polyether ester amide copolymer is preferably 20 to 80% in terms of molar ratio. When it is 20% or more, good moisture absorption performance is obtained, which is preferable. Moreover, it is preferable that it is 80% or less since good dyeing fastness and washing durability of moisture absorption performance can be obtained.
• the constituent ratio of polyamide and poly (alkylene oxide) glycol is preferably 20% / 80% to 80% / 20% in terms of molar ratio.
• a poly (alkylene oxide) glycol content of 20% or more is preferable because good moisture absorption performance can be obtained. Further, it is preferable that the poly (alkylene oxide) glycol is 80% or less because good dyeing fastness and washing durability with moisture absorption performance can be obtained.
• polyamide in the sheath examples include nylon 6, nylon 66, nylon 46, nylon 9, nylon 610, nylon 11, nylon 12, nylon 612 and the like, or compounds having an amide-forming functional group such as laurolactam, sebacic acid, Examples thereof include copolymer polyamides containing copolymer components such as terephthalic acid, isophthalic acid, and 5-sodium sulfoisophthalic acid.
• nylon 6, Nylon 11, Nylon 12, Nylon 610, Nylon 612 have a small difference in melting point from the polyether ester amide copolymer, and can suppress thermal deterioration of the polyether ester amide copolymer during melt spinning. From the viewpoint of yarn-making property, it is preferable.
• nylon 6 having a high dyeability is preferable.
• the core-sheath composite yarn of the present invention is required to have a strength retention of 50% or more and 100% or less after dry heat treatment at 150 ° C. for 1 hour.
• the ratio is less than 50%, when the drying function (hereinafter referred to as tumble drying) of a home-use laundry dryer is repeatedly performed, the raw yarn is hardened or embrittled, the durability of the fabric is reduced, and tearing occurs.
• tumble drying drying function
• they are 60% or more and 100% or less.
• the core-sheath composite yarn of the present invention preferably has a tensile strength of 2.5 cN / dtex or more. More preferably, it is 3.0 cN / dtex or more. By setting it as such a range, it is possible to provide clothing excellent in strength that can withstand actual use, mainly in clothing usage such as inner clothing usage and sports clothing usage.
• the core-sheath composite yarn of the present invention needs to have a function of adjusting the humidity in the clothes in order to obtain good comfort when worn.
• the temperature in the clothes represented by 30 ° C x 90% RH and the outside air temperature represented by 20 ° C x 65% RH when performing light to medium work or light to medium exercise ⁇ MR expressed by the difference in moisture absorption is used.
• a larger ⁇ MR corresponds to higher moisture absorption performance and better comfort when worn.
• the core-sheath composite yarn of the present invention preferably has a ⁇ MR of 5.0% or more. More preferably, it is 7.0% or more, More preferably, it is 10.0% or more. By setting it as this range, the stuffiness and stickiness at the time of wear can be suppressed, and the clothing excellent in comfort can be provided.
• the core-sheath composite yarn of the present invention preferably has a ⁇ MR retention of 70% or more and 100% or less after dry heat treatment at 150 ° C. for 1 hour. By setting it as such a range, even if tumble drying is repeatedly performed, moisture absorption / release performance can be maintained, and clothing having excellent comfort can be provided.
• the polyether ester amide copolymer used in the core of the present invention contains both a hindered phenol stabilizer and a hindered amine stabilizer (hereinafter referred to as HALS stabilizer) which are antioxidants for scavenging radicals.
• HALS stabilizer hindered amine stabilizer
• thermal deterioration of the polyetheresteramide copolymer is suppressed, durability and moisture absorption / release performance can be maintained, and a core-sheath composite yarn having a soft texture can be obtained.
• the polyether ester amide copolymer used in the core contains poly (alkylene oxide) glycol, and the poly (alkylene oxide) glycol generates radicals from within the molecule by heat application, and adjoins atoms.
• the chain reaction that radicals are generated by attack proceeds, and the reaction heat becomes a high temperature exceeding 200 degrees.
• fever provision to a molecular chain is easy, so that the molecular weight of poly (alkylene oxide) glycol is small, it tends to generate
• the number average molecular weight of the poly (alkylene oxide) glycol contained in the polyether ester amide copolymer used in the present invention is relatively small, 300 to 3,000, the above-mentioned mechanism causes thermal degradation of the polyether ester amide copolymer.
• the yarn tends to progress, and the yarn tends to be hardened and embrittled, and the moisture absorption performance is lowered.
• a hindered phenol stabilizer which is an antioxidant for capturing radicals is added to the polyether ester amide copolymer in the core.
• the heat history during the spinning process high temperature applied during polymer melting and heat setting after stretching
• the heat history during higher-order processing processes such as dyeing and heat setting of fabrics
• the heat of the hindered phenol stabilizer can be reduced by using a HALS (Hindered Amine Light Stabilizer) stabilizer in combination with the antioxidant in order to prevent the amount of the active ingredient of the antioxidant that captures radicals remaining in the fabric and clothing. Deterioration can be suppressed, and soft texture, durability and moisture absorption / release performance can be maintained even when tumble drying is repeated.
• HALS Hindered Amine Light Stabilizer
• the amount of the hindered phenol stabilizer added during the production of the core-sheath composite yarn of the present invention is 1.0% by weight or more and 5.0% by weight or less based on the weight of the polyether ester amide copolymer in the core part. Is preferred. More preferably, it is 2.0 weight% or more and 4.0 weight% or less. By setting the content to 1.0% by weight or more, even when tumble drying is repeatedly performed, it is possible to prevent the base yarn from being cured, embrittled, and the hygroscopic performance is lowered. It is preferable for the amount to be 5.0% by weight or less because the spinning property is good and yellowing of the raw yarn can be suppressed.
• the amount of residual hindered phenol stabilizer in the core-sheath composite yarn is preferably 70% or more compared to the amount of hindered phenol stabilizer added to the core-sheath composite yarn (vs. core-sheath composite yarn). More preferably, it is 80% or more. By setting it as such a range, even if tumble drying is repeatedly performed, it is possible to prevent hardening and embrittlement of the raw yarn, a decrease in moisture absorption performance, and the like.
• the amount of the HALS stabilizer added during the production of the core-sheath composite yarn of the present invention is preferably 1.0% by weight or more and 5.0% by weight or less with respect to the weight of the polyether ester amide copolymer in the core part. . More preferably, it is 1.5 wt% or more and 4.0 wt% or less. By setting it as 1.0 weight% or more, the heat deterioration of the hindered phenol stabilizer used together can be suppressed. It is preferable for the amount to be 5.0% by weight or less because the spinning property is good and yellowing of the raw yarn can be suppressed.
• the hindered phenol stabilizer and HALS stabilizer used in the present invention preferably have a 5% weight loss temperature of 300 ° C. or higher in thermogravimetric analysis.
• the stabilizer itself is less likely to deteriorate with respect to the heat history during the spinning process and the heat history during the high-order processing step, and the amount of the active ingredient of the antioxidant that supplements radicals remaining in the fabric and clothing is supplemented. Therefore, even if tumble drying is repeatedly performed, thermal deterioration of the polyetheresteramide copolymer is suppressed, and a soft texture, durability and moisture absorption / release performance can be maintained.
• hindered phenol stabilizer examples include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (IR1010), (1,3,5-trimethyl).
• the HALS stabilizer used in the present invention is, for example, dibutylamine 1,3,5-triazine / N, N-bis (2,2,6,6-tetramethyl-4-piperidyl-1,6-hexamethylenediamine N- (2,2,6,6-tetramethyl-4-piperidyl) butylamine polycondensate (CHIMASSORB2020FDL), 4,7, N, N′-tetrakis [4,6-bis [butyl (1,2 , 2,6,6-Pentamethyl-4-piperidinyl) amino] -1,3,5-triazin-2-yl] -4,7-diazadecane-1,10-diamine (CHIMASSORB119), poly [ ⁇ 6- ( 1,1,3.3-tetramethylbutyl) amino-1,3,5-triazine-2,4diyl) ((2,2,6,6-tetramethyl-4-piperidyl) imino) hexamethylene ((2,2, 6,6te
• various additives such as matting agents, flame retardants, ultraviolet absorbers, infrared absorbers, crystal nucleating agents, fluorescent whitening agents, antistatic agents, hygroscopic polymers, Carbon or the like may be copolymerized or mixed as necessary with a total additive content of 0.001 to 10% by weight based on the entire fiber.
• the core-sheath composite yarn of the present invention preferably has an elongation of 35% or more. More preferably, it is 40 to 80%. By setting it as this range, the process passability in the high-order processes, such as weaving, knitting, and false twisting, becomes favorable.
• the total fineness and the number of filaments of the core-sheath composite yarn of the present invention are not particularly limited, and can be an arbitrary shape depending on the use of the fabric from which a cross-sectional shape is obtained. Considering the use as a long fiber material for clothing, the total fineness of the multifilament is preferably 5 dtex or more and 235 dtex or less, and the number of filaments is preferably 1 or more and 144 filaments or less.
• the cross-sectional shape is preferably a circle, triangle, flat, Y-type, star-shaped, eccentric type, or bonded type.
• the core-sheath composite yarn of the present invention can be obtained by known melt spinning and composite spinning techniques. Examples thereof are as follows.
• a polyamide (sheath part) and a polyether ester amide copolymer (core part) are melted separately, measured and transported by a gear pump, and a composite flow is formed so that a core-sheath structure is formed as it is by a normal method.
• the yarn is discharged from the spinneret and cooled by blowing cooling air from a chimney or other yarn cooling device to cool the yarn to room temperature.
• the yarn is supplied by the oil supply device, converged, entangled by the first fluid entanglement nozzle device, and the take-up roller. , Passing through a stretching roller, and then stretching according to the ratio of the peripheral speeds of the take-up roller and the stretching roller. Further, the yarn is heat-set by a drawing roller and wound by a winder (winding device).
• the spinning temperature is preferably 240 ° C. or higher and 270 ° C. or lower.
• a spinning temperature of 240 ° C. or higher is preferable because the polyamide and the polyether ester amide copolymer have a melt viscosity suitable for melt spinning.
• thermal decomposition of the hindered phenol stabilizer and the HALS stabilizer can be suppressed and the effect can be exerted, and thermal decomposition of the polyether ester amide copolymer is suppressed, which is preferable.
• the ratio of the core portion of the core-sheath composite yarn of the present invention needs to be 20% by weight to 80% by weight with respect to the entire composite yarn. More preferably, it is 30 to 70% by weight. By setting it as such a range, it becomes possible to add suitable extending
• the polyamide chip used for the sheath of the present invention preferably has a relative viscosity of sulfuric acid of 2.3 or more and 3.3 or less. By setting it as such a range, it becomes possible to add suitable extending
• the polyether ester amide copolymer polymer chip used for the core of the present invention has an orthochlorophenol relative viscosity of 1.2 to 2.0.
• orthochlorophenol relative viscosity of orthochlorophenol is 1.2 or more, an optimum stress is applied to the sheath during spinning, and crystallization of the polyamide in the sheath proceeds to increase the strength, which is preferable.
• a method of blending a hindered phenol stabilizer and a HALS stabilizer with a polyether ester amide copolymer is a method of adhering a hindered phenol stabilizer and a HALS stabilizer to a chip of a polyether ester amide copolymer.
• a master chip containing a high concentration of a hindered phenol stabilizer and a HALS stabilizer in a polyether ester amide copolymer is produced.
• the master chip method is preferable, and a high concentration of hindered phenol stabilizer and HALS stabilizer can be uniformly dispersed in the polymer, which is preferable.
• the spinning conditions are set so that the product of the speed of the yarn taken up by the take-up roller (spinning speed) and the draw ratio, which is the value of the peripheral speed ratio between the take-up roller and the drawing roller, is 3300 or more and 4500 or less. It is preferable to set. More preferably, it is 3300 or more and 4000 or less.
• This numerical value represents the total amount of stretching of the polymer discharged from the die from the die discharge linear speed to the peripheral speed of the take-up roller, and further from the peripheral speed of the take-off roller to the peripheral speed of the drawing roller. By setting it as such a range, it becomes possible to add suitable extending
• the heat setting temperature by the stretching roller is preferably 110 ° C. or more and 160 ° C. or less.
• the temperature is preferably 110 ° C. or higher, crystallization of nylon in the sheath portion is promoted, and strength improvement and tightening of the drum are suppressed, which is preferable.
• the heat decomposition of a hindered phenol type stabilizer is 160 degrees C or less, it is preferable.
• the spinning oil applied by the oil supply device is preferably a non-hydrous oil.
• the polyether ester amide copolymer in the core is a polymer with a ⁇ MR of 10% or more and has excellent hygroscopic performance. Therefore, when a non-hydrous oil agent is applied, it gradually absorbs moisture in the air, causing swelling. This is preferable because it is difficult and stable winding is possible.
• the core-sheath composite yarn of the present invention is excellent in moisture absorption performance, it can be preferably used for clothing.
• a fabric form it can select according to the objectives, such as a textile fabric, a knitted fabric, and a nonwoven fabric.
• the larger the ⁇ MR the higher the moisture absorption performance, and the better the comfort when worn. Therefore, the fabric having at least a portion of the core-sheath composite yarn of the present invention has excellent comfort by adjusting the mixing ratio of the core-sheath composite yarn of the present invention so that ⁇ MR is 5.0% or more.
• Apparel can be provided.
• clothing it can be set as various clothing products, such as innerwear and sportswear.
• Relative viscosity of sulfuric acid 0.25 g of a sample was dissolved so as to be 1 g with respect to 100 ml of sulfuric acid having a concentration of 98 wt%, and the flow time (T1) at 25 ° C. was measured using an Ostwald viscometer. Subsequently, the flow time (T2) of only sulfuric acid having a concentration of 98 wt% was measured.
• the ratio of T1 to T2, that is, T1 / T2 was defined as sulfuric acid relative viscosity.
• Fineness Set a fiber sample on a 125 m / round measuring instrument, rotate it 200 times to create a looped skein, and dry it with a hot air dryer (105 ⁇ 2 ° C. ⁇ 60 minutes). The fineness was calculated from the value obtained by measuring the skein mass and multiplying by the official moisture content. The official moisture content of the core-sheath composite yarn was 4.5%.
• Temperature at 5% weight loss It was measured using a thermogravimetric analyzer (TGA7) manufactured by PERKIN ELMER. 10 mg of the sample was heated from 30 ° C. to 400 ° C. at a temperature rising rate of 10 ° C./min in a nitrogen atmosphere, and the temperature at the time of 5% weight loss was calculated.
• TGA7 thermogravimetric analyzer manufactured by PERKIN ELMER. 10 mg of the sample was heated from 30 ° C. to 400 ° C. at a temperature rising rate of 10 ° C./min in a nitrogen atmosphere, and the temperature at the time of 5% weight loss was calculated.
• Residual hindered phenol stabilizer amount (composite core sheath yarn) A. Preparation of Standard Solution 0.02 g of a hindered phenol stabilizer was weighed into a 20 mL volumetric flask, dissolved by adding 2 mL of chloroform, and fixed with tetrahydrofuran (THF) (standard stock solution: about 1000 ⁇ g / mL). The standard stock solution was appropriately diluted with acetonitrile to prepare a standard solution.
• THF tetrahydrofuran
• HFIP hexafluoroisopropanol
• MR65 [(W65 ⁇ W0) / W0] ⁇ 100%
• MR90 [(W90 ⁇ W0) / W0] ⁇ 100%
• ⁇ MR MR90 ⁇ MR65
• ⁇ MR retention after dry heat treatment As a change index of ⁇ MR before and after dry heat treatment, ⁇ MR retention after dry heat treatment was calculated by the following formula. ( ⁇ MR after dry heat treatment / ⁇ MR before dry heat treatment) ⁇ 100.
• a polyamide component is nylon 6
• a polyether component is polyethylene glycol having a molecular weight of 1500
• a polyether ester amide copolymer having a molar ratio of nylon 6 to polyethylene glycol of 24%: 76% (Arkema MH1657, orthochlorophenol relative viscosity: 1.69) chip was used for the core.
• a hindered phenol stabilizer manufactured by BASF, IR1010, 5% weight loss temperature: 351 ° C.
• a HALS stabilizer BASF
• a master chip containing CHIMASSORB2020FDL, 5% weight loss: 404 ° C) and a polyether ester amide copolymer chip are blended, and the amount added to the weight of the core is hindered phenol-based.
• Agent (IR1010) / HALS stabilizer (CHIMASSORB2020FDL) 2.0 wt% / 2.0 wt%.
• polyamide a nylon 6 chip having a relative viscosity of sulfuric acid of 2.71 was used for the sheath.
• the number of rotations of the gear pump is selected so that the total fineness of the obtained core-sheath composite yarn is 56 dtex, the yarn is cooled and solidified by the yarn cooling device, and the non-hydrous oil agent is supplied by the oil supply device.
• Entangling is provided by a 1-fluid entangling nozzle device, the peripheral speed of the take-up roller as the first roll is 2405 m / min, the peripheral speed of the stretching roller as the second roll is 3608 m / min, and heat setting is performed by the stretching roller at 150 ° C. And wound up at a winding speed of 3500 m / min to obtain a core-sheath composite yarn of 56 dtex 24 filaments.
• Table 1 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol stabilizer of the obtained core-sheath composite yarn was 88%, the strength retention rate after dry heat treatment was 65%, and the ⁇ MR retention rate after dry heat treatment was 75%. Even if the obtained core-sheath composite yarn is repeatedly tumble-dried, the raw yarn does not harden or become brittle, and can maintain a soft texture, durability and moisture absorption / release performance.
• Example 2 A core / sheath composite yarn of 56 dtex 24 filaments was obtained in the same manner as in Example 1 except that the spinning temperature was 270 ° C. Table 1 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol stabilizer in the obtained core-sheath composite yarn was 75%, the strength retention after dry heat treatment was 60%, and the ⁇ MR retention rate after dry heat treatment was 72%.
• Example 3 A core / sheath composite yarn of 56 dtex 24 filaments was obtained in the same manner as in Example 1 except that the spinning temperature was 240 ° C. Table 1 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as good as 93%, strength retention after heat treatment was 70%, and ⁇ MR retention was 77% after heat treatment.
• Example 4 A core / sheath composite yarn of 56 dtex 24 filaments was obtained in the same manner as in Example 1 except that the drawing roller was set to 120 ° C. Table 1 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as good as 90%, and the strength retention after heat treatment was 67% and the ⁇ MR retention after heat treatment was 77%.
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as good as 85%, strength retention after heat treatment was 63%, and ⁇ MR retention was 72% after heat treatment.
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as good as 83%, and the strength retention after heat treatment was 60% and the ⁇ MR retention after heat treatment was 70%.
• Example 7 The same as in Example 1 except that the hindered phenol stabilizer (IR1010) / HALS stabilizer (CHIMASSORB2020FDL) was adjusted to 3.0% by weight / 2.0% by weight with respect to the weight of the core.
• the core-sheath composite yarn of 56 dtex 24 filaments was obtained by this method.
• Table 2 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as good as 86%, and the strength retention after heat treatment was 70% and the ⁇ MR retention after heat treatment was 78%.
• Example 8 Example 1 except that the hindered phenol stabilizer (IR1010) / HALS stabilizer (CHIMASSORB2020FDL) was adjusted to 3.0 wt% / 3.0 wt% with respect to the weight of the core.
• the core-sheath composite yarn of 56 dtex 24 filaments was obtained by this method.
• Table 2 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol-based stabilizer contained in the obtained core-sheath composite yarn was as good as 90%, the strength retention after heat treatment was 75%, and the ⁇ MR retention after heat treatment was as good as 80%.
• Example 9 Example 1 except that the hindered phenol stabilizer (IR1010) / HALS stabilizer (CHIMASSORB2020FDL) was adjusted to 4.0 wt% / 4.0 wt% with respect to the weight of the core.
• the core-sheath composite yarn of 56 dtex 24 filaments was obtained by this method.
• Table 2 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as good as 93%, strength retention after heat treatment was 80%, and ⁇ MR retention was 85% after heat treatment.
• Example 10 The same as Example 1 except that the hindered phenol stabilizer (IR1010) / HALS stabilizer (CHIMASSORB2020FDL) was adjusted to 1.0 wt% / 1.0 wt% with respect to the weight of the core.
• the core-sheath composite yarn of 56 dtex 24 filaments was obtained by this method.
• Table 2 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as good as 75%, and the strength retention after heat treatment was 55% and the ⁇ MR retention after heat treatment was 70%.
• Example 1 A core-sheath composite yarn of 56 dtex 24 filaments was obtained in the same manner as in Example 1 except that the hindered phenol stabilizer and the HALS stabilizer were not added and the strength retention after dry heat treatment was 30%. . Table 3 shows the physical properties of the obtained fiber.
• the obtained core-sheath composite yarn had a ⁇ MR retention of 50% after dry heat treatment.
• the obtained core-sheath composite yarn was repeatedly tumble dried, hardening and embrittlement of the original yarn were observed, the texture became hard, and the durability was poor.
• Example 2 A core / sheath composite yarn of 56 dtex 24 filaments was obtained in the same manner as in Example 1 except that the HALS stabilizer (CHIMASSORB2020FDL) was not added and the strength retention after dry heat treatment was 40%. Table 3 shows the physical properties of the obtained fiber.
• HALS stabilizer CHIMASSORB2020FDL
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as bad as 40%, and the ⁇ MR retention rate after heat treatment was 55%.
• the obtained core-sheath composite yarn was repeatedly tumble dried, hardening and embrittlement of the original yarn were observed, the texture became hard, and the durability was poor.
• moisture absorption performance fell by the thermal deterioration of the polyethyleneglycol part contained in a polyetheresteramide copolymer.
• Example 3 A core-sheath composite yarn of 56 dtex 24 filaments was obtained in the same manner as in Example 1 except that the hindered phenol stabilizer (IR1010) was not added and the strength retention after dry heat treatment was 33%. Table 3 shows the physical properties of the obtained fiber.
• the obtained core-sheath composite yarn had a ⁇ MR retention rate of 52% after heat treatment.
• the obtained core-sheath composite yarn was repeatedly tumble dried, hardening and embrittlement of the original yarn were observed, the texture became hard, and the durability was poor.
• moisture absorption performance fell by the thermal deterioration of the polyethyleneglycol part contained in a polyetheresteramide copolymer.
• the amount of residual hindered phenol stabilizer contained in the obtained core-sheath composite yarn was as bad as 60%, and the ⁇ MR retention after heat treatment was 65%.
• the obtained core-sheath composite yarn was repeatedly tumble dried, hardening and embrittlement of the original yarn were observed, the texture became hard, and the durability was poor.
• moisture absorption performance fell by the thermal deterioration of the polyethyleneglycol part contained in a polyetheresteramide copolymer.
• Example 5 The same method as in Example 1 except that the hindered phenol stabilizer was changed to one having a temperature of 223 ° C. at a weight loss of 5% (BASF, IR1135), and the strength retention after dry heat treatment was 40%.
• the core-sheath composite yarn of 56 dtex 24 filaments was obtained.
• Table 3 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol stabilizer in the obtained core-sheath composite yarn was 50%, and the ⁇ MR retention rate after dry heat treatment was 60%.
• the obtained core-sheath composite yarn was repeatedly tumble dried, hardening and embrittlement of the original yarn were observed, the texture became hard, and the durability was poor.
• moisture absorption performance fell by the thermal deterioration of the polyethyleneglycol part contained in a polyetheresteramide copolymer.
• Example 6 Same as Example 1 except that the HALS stabilizer was changed to one having a 5% weight loss temperature of 275 ° C. (ADEKA, ADK STAB LA-81) and the strength retention after dry heat treatment was 45%.
• the core-sheath composite yarn of 56 dtex 24 filaments was obtained by this method. Table 3 shows the physical properties of the obtained fiber.
• the amount of residual hindered phenol-based stabilizer in the obtained core-sheath composite yarn was 63%, and the ⁇ MR retention ratio after dry heat treatment was 65%.
• the obtained core-sheath composite yarn was repeatedly tumble dried, hardening and embrittlement of the original yarn were observed, the texture became hard, and the durability was poor.
• moisture absorption performance fell by the thermal deterioration of the polyethyleneglycol part contained in a polyetheresteramide copolymer.
• the obtained fiber had a fineness of 56 dtex, an elongation of 50%, a strength of 3.0 cN / dtex, ⁇ MR of 6.7%, and a ⁇ MR retention of 60% after dry heat treatment.
• the core-sheath composite yarn of the present invention is a core-sheath composite yarn that has high moisture absorption performance and comfort that exceeds natural fibers, and that can maintain soft texture, durability, and moisture absorption / release performance even after repeated washing and drying. Can be provided.

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