WO2017114313A1 - Fibre composite de type âme-gaine, fils à fausse torsion, et structure fibreuse - Google Patents

Fibre composite de type âme-gaine, fils à fausse torsion, et structure fibreuse Download PDF

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Publication number
WO2017114313A1
WO2017114313A1 PCT/CN2016/111763 CN2016111763W WO2017114313A1 WO 2017114313 A1 WO2017114313 A1 WO 2017114313A1 CN 2016111763 W CN2016111763 W CN 2016111763W WO 2017114313 A1 WO2017114313 A1 WO 2017114313A1
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Prior art keywords
core
type composite
sheath type
sheath
composite fiber
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PCT/CN2016/111763
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English (en)
Chinese (zh)
Inventor
成娟
旦浩一
鹿野秀和
望月克彦
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东丽纤维研究所（中国）有限公司
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Priority to JP2018534054A priority Critical patent/JP2019502036A/ja
Priority to KR1020187021318A priority patent/KR20180097712A/ko
Priority to CN201680057381.4A priority patent/CN108138377A/zh
Publication of WO2017114313A1 publication Critical patent/WO2017114313A1/fr

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    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/66—Polyesters containing oxygen in the form of ether groups
    • C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/672—Dicarboxylic acids and dihydroxy compounds
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters
    • 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
    • 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
    • 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
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • 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
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
    • D02G1/022—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting while simultaneously drawing the yarn
    • 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
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads

Definitions

  • the present invention relates to a core-sheath type composite fiber in which a core component and a sheath component are both crystalline polymers, and a core component is a hygroscopic polymer, and at least a part of core components on a fiber cross section are exposed on a surface. Specifically, it relates to a kind of smear and hairiness which are generated when a fiber structure such as a woven fabric or a knitted fabric is formed in order to suppress the occurrence of the elongation and the occurrence of the false twisting project, the occurrence of broken wires and hairiness is small, and the engineering passability is good.
  • polyester fiber Due to its low price and excellent mechanical properties, polyester fiber is extremely versatile. However, due to the lack of hygroscopicity, it is easy to generate a stuffy feeling in high humidity in summer, and it is easy to generate static electricity in low humidity in winter, and there are problems to be solved from the viewpoint of wearing comfort.
  • a general method for imparting hygroscopicity to a polyester fiber such as copolymerizing a hydrophilic compound or adding a hydrophilic compound to a polyester, wherein the hydrophilic compound may be polyethylene glycol.
  • Patent Document 1 a proposal has been made for a polyester to produce a fiber using a polyester copolymerized with polyethylene glycol as a hygroscopic polymer.
  • the hygroscopic polymer is separately fibrillated to make the polyester fiber hygroscopic.
  • Patent Document 2 proposes an eccentric core-sheath type composite fiber in which a sheath component is a hygroscopic polymer and a core component is a hydrophobic polymer.
  • a sheath component is a hygroscopic polymer
  • a core component is a hydrophobic polymer.
  • Patent Document 3 proposes a core-sheath type composite fiber in which a core component is a polyester in which polyethylene glycol is copolymerized and a sheath component is polyethylene terephthalate.
  • a core component is a polyester in which polyethylene glycol is copolymerized and a sheath component is polyethylene terephthalate.
  • the polyester fiber is hygroscopic.
  • Patent Documents 4 and 5 a core-sheath type composite fiber in which a core component is a polymer in which polyethylene glycol is copolymerized, a sheath component is polyethylene terephthalate, and a part of a sheath is opened is proposed.
  • the core component is hygroscopic, in these proposals, the hollow fiber is formed into a C-shaped hollow fiber by the elution of the core component, and the polyester fiber is imparted with lightness.
  • Patent Document 4 discloses that a polyparaphenylene group of polyethylene glycol having a weight average molecular weight of 500 to 8000 g/mol, that is, a number average molecular weight of 8000 g/mol or less is copolymerized in an amount of 8 to 70% by weight.
  • Patent Document 5 discloses polyethylene terephthalate copolymerized with 17 wt% of polyethylene glycol having a molecular weight of 3000 g/mol.
  • the core component is a hydrophobic polymer, it has morphological stability against reversible change in moisture absorption and drying, but at least half of the fiber surface is exposed by the hygroscopic polymer, and is described in Patent Document 1. In the same way, the swelling and shedding of the hygroscopic polymer occurs, and there are problems in engineering passability and quality.
  • An object of the present invention is to solve the above-mentioned problems and to provide a fiber structure in which a fiber structure such as a woven fabric or a knitted fabric is formed in order to suppress the occurrence of the elongation and the occurrence of the false twisting process, the occurrence of broken yarn and hairiness is small, and the engineering passability is good. It is possible to suppress the cracking of the sheath component and the elution of the hygroscopic polymer and the hygroscopicity after the hot water treatment by the volume expansion of the core component hygroscopic polymer during hot water treatment such as dyeing, and the like. A core-sheath type composite fiber that is still excellent and suitable for use in clothing.
  • the above object of the present invention can be solved by a core-sheath composite fiber having the following characteristics.
  • the core component and the sheath component of the core-sheath type composite fiber are both crystalline polymers, and the core component is a hygroscopic polymer; at least a part of the core component in the cross section of the core-sheath type composite fiber is exposed on the surface, and cross-section with an outer perimeter of the sum of the length r S R is exposed on the surface portion of the core component ratio r S / R of 0.05 to 0.40; outside of the core-sheath type composite fiber push melting start temperature of at least 150 °C, and the heat
  • the moisture absorption rate difference ⁇ MR after the water treatment was 2.0 to 10.0%.
  • the ratio r M /R of the outer peripheral length R of the cross section to the maximum value r M of the length of the core component exposed at the surface portion is 0.01 to 0.20, and the composite weight ratio of the core component to the sheath component is preferably 10/. 90 to 70/30.
  • the value of the color tone change value ⁇ b of the composite fiber before and after the hot water treatment is preferably 3.0 or less, and the composite fiber preferably contains a semi-hindered phenol antioxidant having a structure represented by Formula 1.
  • R1 is a semi-hindered phenolic antioxidant formed by combining any one of hydrocarbon, oxygen and nitrogen
  • R2 is a semi-hindered phenolic antioxidant formed by combining any one of hydrogen, hydrocarbon, oxygen and nitrogen.
  • the hygroscopic polymer of the core component is preferably at least one of a polyether ester, a polyether amide, and a polyether amide ester having a polyether as a copolymer component.
  • the polyether is preferably polyethylene glycol, polypropylene glycol or polytetramethylene glycol.
  • the polyether ester preferably contains an aromatic dicarboxylic acid and an aliphatic diol as main constituent components, and the polyether is a copolymer component.
  • the aliphatic diol is preferably ethylene glycol
  • the number average molecular weight of the polyether is preferably from 4,000 to 30,000 g/mol
  • the copolymerization ratio of the polyether is preferably from 10 to 35 wt%.
  • the aliphatic diol is preferably 1,4-butanediol
  • the number average molecular weight of the polyether is preferably from 2,000 to 30,000 g/mol
  • the copolymerization ratio of the polyether is preferably from 10 to 60% by weight.
  • sheath component of the core-sheath type composite fiber is preferably a cationic dyeable polyester.
  • the false twist yarn of the present invention is formed by combining two or more core-sheath type composite fibers, and at least a part of the fiber structure is preferably a core-sheath type composite fiber and/or a false twist yarn.
  • the present invention it is possible to suppress the occurrence of the fusion and the occurrence of the false twisting project, and the occurrence of the broken yarn and the hairiness is small, and the engineering passability is good.
  • a fiber structure such as a woven fabric or a knitted fabric is formed, stains and hairiness are small, and the quality is excellent.
  • Type composite fiber is possible to suppress cracking of the sheath component due to volume expansion of the core component hygroscopic polymer during hot water treatment such as dyeing, and elution of the hygroscopic polymer, and excellent moisture absorption after hot water treatment, and the core sheath suitable for clothing use.
  • Fig. 1 (a) to (m) are schematic views showing the cross-sectional shape of the core-sheath composite fiber of the present invention.
  • 1 indicates a core component
  • 2 indicates a sheath component.
  • FIG. 2 is a schematic view showing the cross-sectional shape of a core-sheath composite fiber prepared in Comparative Example 1.
  • the core component and the sheath component are both crystalline polymers, and the core component is a hygroscopic polymer, at least a part of the core component on the cross section of the fiber is exposed on the surface, and the outer circumference R of the cross section is
  • the ratio r S /R of the total length r S of the core component exposed at the surface portion is 0.05 to 0.40;
  • the extrapolated melting initiation temperature of the core-sheath type composite fiber is 150 ° C or more, and the moisture absorption rate after hot water treatment
  • the difference ⁇ MR is 2.0 to 10.0%.
  • the hygroscopic polymer is likely to swell due to the presence of the spinning oil agent, rubbing against the roller or the yarn guide to cause detachment and formation of accumulated dirt, causing broken yarn and hairiness, and thus poor engineering passability, and due to formation
  • a fiber structure such as a woven fabric or a knitted fabric
  • staining and hairiness occur, and there is a problem of low quality.
  • the result of the intensive review conducted by the present inventors is that the core component and the sheath component are simultaneously crystallized, and the core component is hygroscopic, the cross-sectional outer circumference R of the fiber, and the length of the core component exposed at the surface portion.
  • the ratio r S /R of the sum r S is 0.05 to 0.40, and the extrapolated melting onset temperature of the core-sheath type composite fiber is 150 ° C or more.
  • the core component of the core-sheath type composite fiber of the present invention is a crystalline polymer.
  • the core component has crystallinity
  • the extrapolation melting onset temperature is measured by the method described in the examples, a melting peak can be observed with melting of the crystal.
  • the core component has crystallinity, the fusion between the fibers due to the extension and the contact with the heating roller and the heater in the false twisting process can be suppressed, and the deposit on the heating roller, the heater, and the yarn guide is reduced.
  • the silk and hairiness are less and the engineering passability is good.
  • a fiber structure such as a woven fabric or a knitted fabric is formed, the generation of stains and hairiness is reduced, and the quality is excellent.
  • the elution of the hygroscopic polymer of the core component during hot water treatment such as dyeing can be suppressed, and the hygroscopicity after the hot water treatment can be maintained.
  • the core component of the core-sheath type composite fiber of the present invention is a hygroscopic polymer.
  • the hygroscopic polymer is a polymer having a moisture absorption rate difference (?MR) of 2.0% or more.
  • the moisture absorption rate difference (?MR) according to the present invention means a value measured by the method described in the examples.
  • the core component of the core-sheath type composite fiber of the present invention may specifically be a hygroscopic polymerization such as a polyether ester, a polyether amide, a polyether amide ester, a polyamide, a thermoplastic cellulose derivative or a polyvinylpyrrolidone.
  • a polyether ester, a polyether amide, or a polyether amide ester having a polyether as a copolymer component is preferable, and in particular, since the polyether ester is excellent in heat resistance, the obtained core-sheath type composite fiber has better mechanical properties and color tone. Therefore, it is more preferable.
  • hygroscopic polymers may be used alone or in combination of two or more. At the same time, those obtained by kneading these hygroscopic polymers with polyester, polyamide, and polyolefin can also be used as hygroscopic polymers.
  • the polyether of the copolymerizable component of the hygroscopic polymer may, for example, be a single polymer such as polyethylene glycol, polypropylene glycol or polytetramethylene glycol, a polyethylene glycol-polypropylene glycol copolymer, polyethylene glycol- A copolymer or the like such as polytetramethylene glycol, but is not limited to the above.
  • polyethylene glycol, polypropylene glycol, and polytetramethylene glycol are preferred because they are excellent in recyclability during production and use, and polyethylene glycol is particularly preferred because it is excellent in hygroscopicity.
  • the polyether ester has an aromatic dicarboxylic acid and an aliphatic diol as main recurring units from the viewpoint of heat resistance and mechanical properties, and preferably a polyether as a copolymer component.
  • aromatic dicarboxylic acid include terephthalic acid, isophthalic acid, phthalic acid, sodium isophthalate-5-sulfonate, and lithium isophthalate-5-sulfonate.
  • 5-(tetraalkyl)-isophthalic acid sulfonate The acid phosphorus compound, 4,4'-biphenyl dicarboxylic acid, 2,6-naphthalene dicarboxylic acid and the like are, but not limited to, the above.
  • the aliphatic diol may specifically be exemplified by ethylene glycol, 1,3-propanediol, 1,4-butanediol, hexanediol, cyclohexane hexanediol, diethylene glycol, and hexamethylene Ethylene glycol, neopentyl glycol, etc., but not limited to the above.
  • ethylene glycol, propylene glycol, and 1,4-butanediol are preferred because they are excellent in handleability and use. From the viewpoint of heat resistance and mechanical properties, ethylene glycol is more preferable; from the viewpoint of crystallinity, 1,4-butanediol is more preferable.
  • the number average molecular weight and the copolymerization ratio of the polyether ester copolymerization component polyether can be appropriately selected within the range in which the polyether ester has crystallinity, and the preferred range differs depending on the composition of the polyether ester. For example, when the aliphatic diol of the composition of the polyether ester is ethylene glycol, if the copolymerization ratio of the polyether is too high, the polyether ester will be eluted in hot water during hot water treatment such as dyeing. Hygroscopicity after water treatment is low.
  • the aliphatic diol which is a constituent of the polyether ester is 1,4-butanediol
  • the crystallinity of the polymer is high, even if it is a polyether compound, compared with the case where ethylene glycol is used as described above.
  • the polymerization rate is high, the elution of the polyether ester in hot water can also be suppressed. That is, when 1,4-butanediol is used as the aliphatic diol, since the copolymerization ratio of the polyether can be increased, the hygroscopicity of the polyether ester, and even the hygroscopicity of the obtained core-sheath type composite fiber can be Improved.
  • the number average molecular weight of the polyether is preferably 4,000 to 30,000 g/mol, and the copolymerization ratio of the polyether is preferably 10 to 35 wt%.
  • the number average molecular weight of the polyether is 4,000 g/mol or more, the polyether ester has high hygroscopicity, and when used as a core component, a core-sheath type composite fiber excellent in hygroscopicity can be obtained.
  • the number average molecular weight of the polyether is 30,000 g/mol or less, the polycondensation reactivity is high, and the unreacted polyether is reduced, and dissolution in hot water during hot water treatment such as dyeing can be suppressed, and moisture absorption after hot water treatment can be suppressed. Sex can be maintained.
  • the number average molecular weight of the polyether is preferably 25,000 g/mol or less, and more preferably 20,000 g/mol or less.
  • the copolymerization ratio of the polyether when the copolymerization ratio of the polyether is 10% by weight or more, the polyether ester has high hygroscopicity, and when used as a core component, a core-sheath type composite fiber excellent in hygroscopicity can be obtained.
  • the copolymerization ratio of the polyether is more preferably 15% by weight or more, and most preferably 20% by weight or more.
  • the copolymerization ratio of the polyether is 35 wt% or less, the fusion between the fibers due to the contact with the heating roller and the heater in the extension and the false twisting process can be suppressed, and the heating roller, the heater, and the guide rail are suppressed.
  • the occurrence of deposits, broken wires, and hairiness is reduced, and the engineering passability is good.
  • a fiber structure such as a woven fabric or a knitted fabric is formed, the generation of stains and hairiness is reduced, and the quality is excellent.
  • the copolymerization ratio of the polyether is more preferably 32% by weight or less, and most preferably 30% by weight or less.
  • the number average molecular weight of the polyether is preferably 2,000 to 30,000 g/mol, and the copolymerization ratio of the polyether is preferably 10 to 60% by weight.
  • the number average molecular weight of the polyether is 2000 g/mol or more, the polyether ester has high hygroscopicity, and when used as a core component, a core-sheath type composite fiber excellent in hygroscopicity can be obtained. At the same time, it is possible to suppress a decrease in crystallinity of the polyether ester.
  • the number average molecular weight of the polyether is more preferably 3,000 g/mol or more, and most preferably 5,000 g/mol or more.
  • the number average molecular weight of the polyether is 8000 g/mol or more, the decrease in the crystallinity of the polyether ester and the decrease in the extrapolation melting initiation temperature can be suppressed, due to the extension and the false-twisting process due to the heating roller and the heater.
  • the fusion between the fibers caused by the contact can also be suppressed, and the occurrence of deposits on the heating roller, the heater, the guide rail, the broken wire, and the hairiness is reduced, and the engineering passability is good, and the fiber structure such as the woven fabric and the knitted fabric is dyed.
  • the number average molecular weight of the polyether is 30,000 g/mol or less, the polycondensation reactivity is high, and the unreacted polyether is reduced, and dissolution in hot water during hot water treatment such as dyeing can be suppressed, and moisture absorption after hot water treatment can be suppressed. Sex can be maintained.
  • the number average molecular weight of the polyether is more preferably 27,000 g/mol or less, most preferably 25,000 g/mol or less, and particularly preferably 20,000 g/mol or less.
  • the copolymerization ratio of the polyether is 10% by weight or more, the polyether ester has high hygroscopicity, and when used as a core component, a core-sheath type composite fiber excellent in hygroscopicity can be obtained.
  • the copolymerization ratio of the polyether is more preferably 15% by weight or more, and most preferably 20% by weight or more.
  • the copolymerization ratio of the polyether is 60% by weight or less, the fusion between the fibers due to the contact with the heating roller and the heater in the elongation and false twisting process can be suppressed, and the heating roller, the heater, and the guide rail are suppressed.
  • the occurrence of deposits, broken wires, and hairiness is reduced, and the engineering passability is good.
  • a fiber structure such as a woven fabric or a knitted fabric is formed, the generation of stains and hairiness is reduced, and the quality is excellent.
  • the copolymerization ratio of the polyether is more preferably 55 wt% or less, and most preferably 50 wt%. Hereinafter, it is particularly preferably 45 wt% or less.
  • a fiber obtained by adding a polyether ester obtained by copolymerizing a large amount of a polyether to a polyester causes a drastic decrease in the moisture absorption rate of the fiber due to oxidative decomposition of the polyether group. Therefore, in the polymerization process of polyether esters, hindered phenolic antioxidants are added in most cases, and most of the hindered phenolic antioxidants are tetra[ ⁇ -(3,5-di-tert-butyl-4-hydroxyl). Phenyl)propionic acid]pentaerythritol ester (IR1010 manufactured by BASF).
  • the ether radical formed by oxidative decomposition attacks the para-position of the phenolic hydroxyl group of the hindered phenolic antioxidant to form an anthraquinone which causes yellowing.
  • the yellow matter is formed by the reaction with NO 2 , that is, the NOx (nitrogen oxide) fastness is low, which affects the quality of the fiber.
  • the copolymerization ratio of the polyether is 25 wt% or less, the yellowing phenomenon is less due to the small amount of the hindered phenol antioxidant added, but the yellowing phenomenon remarkably occurs when the copolymerization ratio of the polyether is 25 wt% or more.
  • the semi-hindered phenolic antioxidant having the structure of the formula 1 of the present invention even if it is oxidatively decomposed to form an ether radical, since the phenolic hydroxyl group is a methyl group on the one side of the phenolic hydroxyl group, the steric hindrance is small, and thus half.
  • the ortho position of the phenolic hydroxyl group of the hindered phenolic antioxidant is attacked, no quinone species are formed, and yellow becomes suppressed.
  • R1 is a semi-hindered phenolic antioxidant formed by combining any one of hydrocarbon, oxygen and nitrogen
  • R2 is a semi-hindered phenolic antioxidant formed by combining any one of hydrogen, hydrocarbon, oxygen and nitrogen.
  • the amount of the antioxidant to be added can be appropriately selected depending on the copolymerization ratio of the polyether, and is preferably from 0.5 to 8.0% by weight.
  • the amount of the antioxidant added is more preferably 1.0% by weight or more, and most preferably 1.5% by weight or more.
  • the amount of the antioxidant added is 8.0% by weight or less, the decomposition of the antioxidant itself causes the yellowing of the fiber to be suppressed, which is preferable.
  • the amount of the antioxidant added is more preferably 7.0% by weight or less, and most preferably 6.0% by weight or less.
  • the sheath component of the core-sheath type composite fiber of the present invention has crystallinity.
  • the sheath component has crystallinity, when the extrapolation melting onset temperature is measured by the method described in the examples, a melting peak can be observed with melting of the crystal.
  • the sheath component has crystallinity, it is possible to suppress the fusion between the fibers due to the contact with the heating roller and the heater during the extension and false twisting, and the deposit on the heating roller, the heater, and the yarn guide is reduced, and the yarn is broken.
  • the hairiness is reduced, and the engineering passability is good.
  • a fiber structure such as a woven fabric or a knitted fabric is formed, the generation of stains and hairiness is reduced, and the quality is excellent.
  • sheath component of the core-sheath type composite fiber of the present invention include polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyamides such as nylon 6, nylon 66, and the like.
  • Polyolefins such as polyethylene and polypropylene are not limited to the above.
  • polyester is preferred because of its excellent mechanical properties and durability.
  • the sheath component is a hydrophobic polymer such as polyester or polyolefin, the hygroscopicity of the core component hygroscopic polymer exposed on the surface can be coexisted with the dry touch of the sheath component hydrophobic polymer, and the wearing comfort can be obtained. Fiber structure.
  • the polyester of the sheath component of the core-sheath type composite fiber of the present invention may specifically be exemplified by polyethylene terephthalate, polytrimethylene terephthalate or polybutylene terephthalate.
  • the family polyester, an aliphatic polyester such as polylactic acid or polyglycolic acid, etc. but is not limited to the above.
  • polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate have excellent mechanical properties and durability, and are preferable because they are excellent in handleability at the time of production and use. Meanwhile, polyethylene terephthalate has a peculiar feeling of polyester fiber, and polybutylene terephthalate has high crystallinity and is preferable.
  • the sheath component of the core-sheath type composite fiber of the present invention is preferably a cationic dyeable polyester.
  • the polyester has an anionic moiety such as a sulfonic acid group, it can interact with a cationic dye having a cationic moiety, and thus has cationic dyeability.
  • the sheath component is a cationic dyeable polyester, it has a clear color developability and is preferably used in combination with a polyurethane fiber to prevent contamination of the dye.
  • the copolymerization component of the cationic dyeable polyester is specifically a 5-isophthalic acid sulfonate, and examples thereof include a lithium salt, a sodium salt, a potassium salt, a phosphonium salt, a phosphonium salt, and the like, but are not limited thereto. It is particularly preferable that the lithium salt and the sodium salt are particularly excellent in crystallinity of the sodium salt.
  • the core-sheath type composite fiber of the present invention at least a part of the core component on the fiber cross section is exposed on the surface. Unlike the core-sheath type composite fiber in which the core component is completely wrapped, at least a part of the core component is exposed on the surface of the fiber cross-section, and it is possible to suppress the damage of the sheath after the volume expansion of the core component hygroscopic polymer during hot water treatment such as dyeing. At the same time, since the core component hygroscopic polymer was exposed on the surface, it was found to have higher hygroscopicity than the core-sheath type composite fiber in which the core component was completely wrapped.
  • Core-sheath type composite fiber of the present invention the sum of the length of the fiber cross-section r S R and the outer perimeter of the surface of the exposed portion of the core component ratio r S / R of 0.05 to 0.40.
  • the ratio r S /R of the outer peripheral length R of the cross-sectional area of the fiber of the present invention to the total length r S of the core component exposed on the surface portion means a value calculated by the method described in the examples.
  • the r S /R of the core-sheath type composite fiber is preferably 0.07 or more, and more preferably 0.10 or more.
  • the r S /R of the core-sheath type composite fiber is 0.40 or less, the fusion between the fibers due to the contact with the heating roller and the heater in the false twisting process can be suppressed, and the heating roller and the heater are heated. The occurrence of deposits, broken wires, and hairiness on the yarn guide is reduced, and the engineering passability is good.
  • the r S /R of the core-sheath type composite fiber is more preferably 0.35 or less, and most preferably 0.30 or less.
  • the ratio r M /R of the outer peripheral length R of the cross section of the fiber to the maximum value r M of the length of the core component exposed on the surface portion is preferably 0.01 to 0.20.
  • the ratio r M /R of the outer peripheral length R of the cross-sectional area of the fiber of the present invention to the maximum value r M of the core component length exposed on the surface portion means a value calculated by the method described in the examples.
  • the core-sheath type composite fiber in which the core component is completely exposed is more hygroscopic than the core component hygroscopic polymer, and is preferable.
  • the core component hygroscopic polymer expands in volume, and it is possible to suppress the destruction of the sheath, which is preferable.
  • the r M /R of the core-sheath type composite fiber is more preferably 0.03 or more, and most preferably 0.05 or more.
  • the r M /R of the core-sheath type composite fiber is 0.20 or less, the fusion between the fibers due to the contact with the heating roller and the heater in the false twisting process can be suppressed, and the heating roller and the heater are heated. The occurrence of deposits, broken wires, and hairiness on the yarn guide is reduced, and the engineering passability is good. When a fiber structure such as a woven fabric or a knitted fabric is formed, the generation of stains and hairiness is reduced, and the quality is excellent. At the same time, it is possible to suppress the elution of the core component hygroscopic polymer in hot water during hot water treatment such as dyeing, and to maintain hygroscopicity after hot water treatment.
  • the r M /R of the core-sheath type composite fiber is more preferably 0.17 or less, and most preferably 0.15 or less.
  • auxiliary modifiers may be added to the core component and/or the sheath component.
  • the auxiliary modifier may specifically be a phase solvent, a plasticizer, an acidification inhibitor, an ultraviolet absorber, an infrared absorber, an optical brightener, a mold release agent, an antibacterial agent, a nucleating agent, a heat stabilizer, and an acidification.
  • the above auxiliary additives may be used singly or in combination.
  • the core-sheath type composite fiber of the present invention has an extrapolated melting onset temperature of 150 ° C or more.
  • the extrapolated melting onset temperature of the core-sheath type composite fiber of the present invention means a value calculated by the method described in the examples. Further, when a plurality of melting peaks are observed, the melting peak from the lowest temperature side is calculated.
  • the extrapolation melting initiation temperature of the core-sheath type composite fiber is 150 ° C or more, the fusion between the fibers due to the contact with the heating roller and the heater in the extension and the false twisting process can be suppressed, and the heating roller, the heater, and the heating roller are heated.
  • the extrapolated melting initiation temperature of the core-sheath type composite fiber is more preferably 170 ° C or more, most preferably 190 ° C or more, and particularly preferably 200 ° C or more.
  • the composite ratio (weight ratio) of the core component/sheath component of the core-sheath type composite fiber of the present invention is preferably 10/90 to 70/30.
  • the composite ratio (weight ratio) of the core component/sheath component of the core-sheath type composite fiber of the present invention means a value calculated by the method described in the examples.
  • the composite ratio of the core component of the core-sheath type composite fiber is 10% by weight or more, a core-sheath type composite fiber having excellent hygroscopicity can be obtained.
  • the composite ratio of the core component of the core-sheath type composite fiber of the present invention is more preferably 20% by weight or more, and most preferably 30% by weight or more.
  • the core component composite fiber has a core component composite ratio of 70% by weight or less, that is, when the composite ratio of the sheath component is 30% by weight or more, the sheath component can have a firm and dry touch.
  • the composite ratio of the core component of the core-sheath type composite fiber of the present invention is more preferably 60% by weight or less, and most preferably 50% by weight or less.
  • the fineness of the multifilament of the core-sheath type composite fiber of the present invention is not particularly limited, and may be appropriately selected depending on the use and characteristics, and is preferably from 10 to 500 dtex.
  • the fineness of the present invention means a value measured by the method described in the examples.
  • the fineness of the core-sheath type composite fiber is 10 dtex or more, the number of broken wires is relatively small, the engineering passability is good, the occurrence of hairiness is small during use, and the durability is excellent.
  • the fineness of the core-sheath type composite fiber is more preferably 30 dtex or more, and most preferably 50 dtex or more.
  • the fineness of the core-sheath type composite fiber is 500 dtex or less, the flexibility of the fiber and the fiber structure is not impaired.
  • the fineness of the core-sheath type composite fiber is more preferably 400 dtex or less, and most preferably 300 dtex or less.
  • the single-filament fineness of the core-sheath type composite fiber of the present invention is not particularly limited, and may be appropriately selected depending on the use and characteristics, and is preferably 0.5 to 4.0 dtex.
  • the single yarn fineness of the present invention means a value obtained by dividing the fineness measured by the method described in the examples by the number of filaments.
  • the monofilament fineness of the core-sheath type composite fiber is more preferably 0.6 dtex or more, and most preferably 0.8 dtex or more.
  • the single-filament fineness of the core-sheath type composite fiber is 4.0 dtex or less, the flexibility of the fiber and the fiber structure is not impaired.
  • the monofilament fineness of the core-sheath type composite fiber is more preferably 2.0 dtex or less, and most preferably 1.5 dtex or less.
  • the strength of the core-sheath type composite fiber of the present invention is not particularly limited, and may be appropriately selected depending on the use and characteristics, and is preferably 2.0 to 5.0 cN/dtex in accordance with the requirements of mechanical properties.
  • the strength of the present invention means a value measured by the method described in the examples.
  • the strength of the core-sheath type composite fiber is more preferably 2.5 cN/dtex or more, and most preferably 3.0 cN/dtex or more.
  • the strength of the core-sheath type composite fiber is 5.0 cN/dtex or less, the flexibility of the fiber and the fiber structure is not impaired.
  • the elongation of the core-sheath type composite fiber of the present invention is not particularly limited, and may be appropriately selected depending on the use and characteristics, and is preferably from 10 to 60% from the viewpoint of durability.
  • the elongation of the present invention means a value measured by the method described in the examples.
  • the elongation of the core-sheath type composite fiber is 10% or more, the fiber and the fiber structure are excellent in abrasion resistance, and the occurrence of hairiness is small during use, and the durability is good.
  • the elongation of the core-sheath type composite fiber is more preferably 15% or more, and most preferably 20% or more.
  • the elongation of the core-sheath type composite fiber is 60% or less, the dimensional stability of the fiber and the fiber structure is good.
  • the elongation of the core-sheath type composite fiber is more preferably 55% or less, and most preferably 50% or less.
  • the core-sheath type composite fiber of the present invention has a moisture absorption rate difference ( ⁇ MR) after hot water treatment of 2.0 to 10.0%.
  • the moisture absorption rate difference (?MR) after the hot water treatment of the present invention means a value measured by the method described in the examples.
  • ⁇ MR is a difference between the moisture absorption rate at a temperature of 30 ° C and a humidity of 90% RH after a slight exercise, and the moisture absorption rate at an external temperature of 20 ° C and a humidity of 65% RH. That is, ⁇ MR is an indicator of hygroscopicity, and the higher the ⁇ MR, the better the wearing comfort.
  • the moisture absorption rate difference (?MR) of the present invention means a value after hot water treatment, and it is very important to exhibit hygroscopicity even after hot water treatment such as dyeing.
  • the ⁇ MR of the core-sheath type composite fiber after hot water treatment is 2.0% or more, the stuffing feeling in the clothes is lowered, and the wearing comfort is obtained.
  • the ⁇ MR of the core-sheath type composite fiber after hot water treatment is preferably 3.0% or more, more preferably 3.5% or more, and most preferably 4.0% or more.
  • the ⁇ MR of the core-sheath type composite fiber after hot water treatment is 10% or less, the workability and the usability are good, and the durability at the time of use is excellent.
  • the color fiber change value ⁇ b of the composite fiber after the hot water treatment is preferably 3.0 or less.
  • the change value ⁇ b of the color tone of the composite fiber before and after the hot water treatment according to the present invention is a value measured by the method described in the examples.
  • the change value ⁇ b of the color tone of the composite fiber before and after the hot water treatment is 3.0 or less, the yellowing of the fiber after the hot water treatment is small, and a fiber of good quality can be obtained.
  • the change value ⁇ b of the color tone of the composite fiber before and after the hot water treatment is preferably 2.0 or less, more preferably 1.5 or less, still more preferably 1.0 or less.
  • the ratio r S /R of the outer circumferential length R of the fiber cross section and the total length r S of the core component exposed at the surface portion is satisfied.
  • the viscosity is 0.05 to 0.40
  • the shape of the fiber cross-section there is no particular limitation on the shape of the fiber cross-section, and the corresponding selection can be made according to the use and characteristics.
  • the number of core components exposed on the surface portion for example, one position shown in Figs. 1(a) to (c) and two places shown in Figs. 1(d) and (e). In the three places shown in FIGS.
  • the four portions shown in FIGS. 1(h) to (j) have a cross-sectional shape of a portion exposed on the surface, but are not limited to the above.
  • the core component portion exposed on the surface is preferably as small as possible. It is preferable that the portion of the core component exposed on the surface shown in FIGS. 1(a) to 1(c) has a cross-sectional shape of one. More specifically, it is preferable that the eccentric core sheath type shown in Figs.
  • the sheath component shown in Fig. 1(c) have a C-shaped core-sheath cross-sectional shape.
  • the lengths of the core component portions exposed on the surface shown in Fig. 1(j) may not coincide.
  • the outer shape of the cross section shown in Figs. 1(k) to (m) may be a flat shape, a meander shape, or a trilobal shape.
  • the form of the fiber is not particularly limited, and various forms such as a monofilament, a multifilament, and a staple fiber may be used.
  • the core-sheath type composite fiber of the present invention can be subjected to the same false twisting and twisting processing as a general fiber, and the weaving and knitting can be carried out in the same manner as in the case of a general fiber.
  • the form of the core-sheath type composite fiber of the present invention and/or the fiber structure formed of the false twisted wire is not particularly limited, and according to a known method, a woven fabric, a knitted fabric, a terry cloth, a non-woven fabric, a spinning, and a filling are used. Cotton can be used. Meanwhile, the core-sheath type composite fiber of the present invention and/or the fiber structure formed of the false twisted silk may be any woven fabric, plain weave, twill weave, woven fabric, or a woven weave, warp knitting, weft knitting, Circular knitting, lace knitting, or variations of these can be used.
  • the core-sheath type composite fiber of the present invention may be combined with other fibers, or may be formed into a blended yarn with other fibers, and then formed into a fiber structure by interlacing or interlacing.
  • the method for producing the core-sheath type composite fiber of the present invention is as follows.
  • the core component and the sheath component it is preferred to dry the core component and the sheath component to a water content of 300 ppm or less before melt spinning.
  • the water content is 300 ppm or less, it is possible to suppress a decrease in molecular weight due to hydrolysis by desorption during melt spinning and foaming by moisture, and it is possible to perform stable spinning.
  • the water content is more preferably 100 ppm or less, and most preferably 50 ppm or less.
  • the previously dried chips are supplied to a screw type or hot plate type melt spinning machine, and the core component and the sheath component are separately melted and metered by a metering pump. Then, it is introduced into a spinning assembly heated in a spinning box, and after the molten polymer is filtered in the spinning assembly, the core component and the sheath component are combined by a core-sheath type composite spinning spinneret.
  • the core sheath structure is spun from a spinneret to form a fiber strand.
  • the fiber yarn spun from the spinning spinneret is cooled and solidified by a cooling device, taken up by the first roller, and wound up on the winder by the second roller to obtain a wound wire.
  • the fiber strands can be supplied with oil by means of an oil supply device, or the fiber strands can be entangled by means of an interlacing device.
  • the spinning temperature of the melt spinning can be appropriately selected depending on the core component, the melting point of the sheath component, and the heat resistance, and is preferably 240 to 320 °C.
  • the spinning temperature is more preferably 250 ° C or higher, and most preferably 260 ° C or higher.
  • the spinning temperature is 320 ° C or lower, thermal decomposition at the time of spinning, reduction in fiber mechanical properties, and coloring can be suppressed.
  • the spinning temperature is more preferably 310 ° C or lower, and most preferably 300 ° C or lower.
  • the spinning speed at the time of melt spinning can be appropriately selected depending on the composition of the core component and the sheath component, the spinning temperature, and the like.
  • the spinning speed in the case of melt-spinning and coiling, and then performing the extension or false twist two-stage engineering method is preferably 500 to 6000 m/min.
  • the spinning speed in the case of the two-stage engineering method is more preferably 1000 m/min or more, and most preferably 1500 m/min or more.
  • the spinning speed is 6,000 m/min or less, stable spinning can be performed by suppressing the spinning tension without breaking the yarn.
  • the spinning speed in the case of the two engineering methods is more preferably 4,500 m/min or less, and most preferably 4,000 m/min or less.
  • the spinning speed in the case of the one-stage engineering method in which the winding and the stretching are performed at the same time is preferably 500 to 5000 m/min for the low speed roller and 2500 to 6000 m/min for the high speed roller.
  • the spinning speed in the case of one-stage engineering method is more preferably a low-speed roller of 1000 to 4,500 m/min, a high-speed roller of 3,500 to 5,500 m/min, and most preferably a low-speed roller of 1,500 to 4,000 m/min and a high-speed roller of 4000 to 5,000 m/min.
  • a one-stage extension method or a multi-stage extension method of two or more stages may be used.
  • the heating method at the time of extension and the means for directly or indirectly heating the running yarn are not specifically limited.
  • Specific examples of the heating method include a liquid bath such as a heating roller, a hot needle, a hot plate, warm water, and hot water, a gas bath such as hot air or steam, a laser, or the like, but the invention is not limited thereto. These heating methods can be used singly or in combination.
  • the heating method preferably takes contact with the heating roller, the contact of the hot needle, the contact with the hot plate, and the immersion of the liquid bath from the viewpoints of the control of the heating temperature, the uniform heating of the running yarn, and the avoidance of the complexity of the apparatus.
  • the elongation temperature in the case of stretching may be appropriately selected depending on the core component, the extrapolated melting initiation temperature of the polymer of the sheath component, and the strength and elongation of the fiber after stretching, and is preferably 50 to 150 °C.
  • the stretching temperature is 50° C. or higher, the yarn to be stretched can be sufficiently preheated, and the thermal deformation during stretching is uniform, and generation of fine spots can be suppressed.
  • the stretching temperature is more preferably 60 ° C or higher, and most preferably 70 ° C or higher.
  • the stretching temperature is 150° C. or less, it is possible to suppress the fusion between the fibers and the thermal decomposition due to the contact with the heating roller, and the engineering passability and quality are good.
  • the stretching temperature is more preferably 145 ° C or lower, and most preferably 140 ° C or lower. At the same time, heat setting at 60 to 150 ° C can be performed if necessary.
  • the stretching ratio at the time of stretching can be appropriately selected depending on the elongation of the fiber before stretching, the strength and elongation of the fiber after stretching, and the like, and is preferably 1.02 to 7.0 times.
  • the stretching ratio is more preferably 1.2 times or more, and most preferably 1.5 times or more.
  • the stretching ratio is 7.0 or less, it is possible to suppress breakage during stretching and to perform stable extension.
  • the stretching ratio is more preferably 6.0 times or less, and most preferably 5.0 times or less.
  • the extension speed at the time of extension can be selected according to whether the extension method is one of the engineering method or the second-stage engineering method. In the case of a section of engineering, the speed of the high speed roller of the above spinning speed is equivalent to the speed of extension.
  • the extension speed in the case where the two-stage engineering method is extended is preferably 30 to 1000 m/min. When the extension speed is 30 m/min or more, the running yarn is stable and the yarn breakage can be suppressed.
  • the elongation speed in the case where the two-stage engineering method is extended is more preferably 50 m/min or more, and most preferably 100 m/min or more. On the other hand, when the stretching speed is 1000 m/min or less, it is possible to suppress breakage during stretching and to perform stable extension.
  • the elongation speed in the case where the two-stage engineering method is extended is more preferably 900 m/min or less, and most preferably 800 m/min or less.
  • a one-stage heater and a two-stage heater in addition to the so-called high-elastic processing using only one-stage heater, a one-stage heater and a two-stage heater, so-called low-elastic processing, can be selected.
  • the heating method of the heater can be contactless or non-contact.
  • Specific examples of the false twisting machine include a friction disk type, a pulley type, a pin type, and the like, but are not limited to the above examples.
  • the temperature of the heater in the case where the false twist processing is performed can be appropriately selected depending on the core component and the extrapolated melting onset temperature of the sheath component polymer, and is preferably 120 to 210 °C.
  • the heater temperature is 120 ° C or more, the yarn for the false twist processing can be sufficiently preheated, and the thermal deformation accompanying the extension is uniform, and the occurrence of the fineness can be suppressed.
  • the temperature of the heater is more preferably 140 ° C The above is most preferably 160 ° C or higher.
  • the temperature of the heater is 210 ° C or less, it is possible to suppress the fusion between the fibers and the thermal decomposition caused by the contact with the heater, and the wire breakage and the contamination of the heater are reduced, and the engineering passability and quality are good.
  • the temperature of the heater is more preferably 200 ° C or lower, and most preferably 190 ° C or lower.
  • the stretching ratio in the case of the false twisting processing can be appropriately selected depending on the elongation of the fiber before the false twist processing, the strength and the elongation of the fiber after the false twist processing, and is preferably 1.01 to 2.5 times.
  • the stretching ratio is more preferably 1.2 times or more, and most preferably 1.5 times or more.
  • the stretching ratio is 2.5 or less, the yarn breakage during the false twist processing can be suppressed, and the stable false twist processing can be performed.
  • the stretching ratio is more preferably 2.2 times or less, and most preferably 2.0 times or less.
  • the processing speed in the case of performing the false twist processing can be appropriately selected, and is preferably 200 to 1000 m/min.
  • the processing speed is more preferably 300 m/min or more, and most preferably 400 m/min or more.
  • the processing speed is 1000 m/min or less, the yarn breakage during the false twist processing can be suppressed, and the stable false twist processing can be performed.
  • the processing speed is more preferably 900 m/min or less, and most preferably 800 m/min or less.
  • the dye is preferably a disperse dye.
  • the dyeing method of the present invention is not particularly limited, and according to a known method, liquid flow dyeing, drum dyeing, shaft dyeing, and dyeing can be employed.
  • the concentration of the fuel and the dyeing temperature are not particularly limited, and a known method can be employed. At the same time, if necessary, it can be refined before the dyeing process, or after the dyeing process.
  • the core-sheath type composite spun fiber of the present invention and the pseudofilament yarn and the fiber structure formed therefrom are excellent in hygroscopicity. Therefore, it can be used for applications requiring comfort and quality. For example, general clothing use, sports clothing use, bedding use, interior decoration use, and use of materials, etc., are not limited to the above list.
  • the polymer of the core component or the sheath component was sampled by hot air drying at 60 ° C for 30 minutes, and then allowed to stand in a constant temperature and humidity machine LHU-123 manufactured by ESPEC at a temperature of 20 ° C and a humidity of 65% RH for 24 hours.
  • the weight of the polymer (W1) was followed by standing in a constant temperature and humidity machine at a temperature of 30 ° C and a humidity of 90% RH for 24 hours, and the weight of the polymer was determined to be (W2). Then, it was dried by hot air at 105 ° C for 2 hours, and the weight of the polymer after absolute drying was measured as (W3).
  • the moisture absorption rate MR1 (%) after standing for 24 hours from the dry state to 20 ° C and a humidity of 65% RH was calculated from the weights W1 and W3 of the polymer, and the weight of the polymer was used according to the following formula.
  • W2 and W3 calculated the moisture absorption rate MR2 (%) after leaving the dry state to 30 ° C and a humidity of 90% RH for 24 hours, and then calculated the moisture absorption rate difference ( ⁇ MR) according to the following formula. Further, one sample was measured five times, and the average value was taken as the moisture absorption rate difference ( ⁇ MR).
  • Hygroscopic rate difference ( ⁇ MR) (%) MR2-MR1.
  • the core component, the sheath component polymer, and the fiber obtained in the example were used as a sample, and the extrapolation melting onset temperature was measured using a Q2000 type differential scanning calorimeter (DSC) manufactured by TA Instruments.
  • DSC differential scanning calorimeter
  • the temperature change range was ⁇ 1 ° C, and the temperature was changed for 60 seconds, and then the temperature was raised to measure TMDSC.
  • the extrapolated melting onset temperature was calculated from the melting peak observed during the second temperature rise in accordance with the standard of JISK7121:1987 (method of measuring the transition temperature of plastic). One sample was measured three times, and the average value was used as the extrapolation melting onset temperature. Further, when a plurality of melting peaks are observed, the extrapolated melting onset temperature is calculated from the melting peak on the lowest temperature side.
  • the core/sheath composite ratio was calculated from the weight of the core component as the core-sheath type composite fiber raw material and the weight of the sheath component.
  • the number of broken wires during the 10-hour processing was counted as the number of broken wires.
  • the heater, the cooling plate, the friction disk, and the yarn guide of the extended false twisting machine after 10 hours of processing were observed, and [the deposit was substantially absent] was counted as ⁇ , [the deposit was A little is counted as ⁇ , [more deposits] is counted as ⁇ , [very much deposit] is counted as ⁇ , and ⁇ and ⁇ are qualified.
  • the fiber obtained in the examples was taken in an environment of a temperature of 20 ° C and a humidity of 65% RH using an electric scale machine manufactured by INTEC.
  • the obtained weight was measured, and the fineness (dtex) was calculated by the following formula. Further, one sample was measured five times, and an average value was taken as the fineness.
  • Denier (dtex) weight (g) of the fiber 100 m ⁇ 100.
  • the strength and the elongation are calculated by the fiber obtained in the examples as a sample, and are calculated in accordance with JIS L1013:2010 (Chemical Fiber Filament Test Method) 8.5.1.
  • the tensile test was carried out under the conditions of a temperature of 20 ° C and a humidity of 65% RH using a ⁇ UTM-III-100 instrument manufactured by Orientec, under the condition of an initial sample field of 20 cm and an extension speed of 20 cm/min.
  • the stress (cN) at the point indicated by the maximum load is divided by the fineness (dtex) to calculate the strength (cN/dtex), and the elongation (L1) at the point indicated by the maximum load and the initial sample length (L0) are passed through the following formula. Calculated the degree of stretch (%). Also, one sample was tested 10 times, and the average value was taken as the strength and the elongation.
  • the elongation (%) ⁇ (L1 - L0) / L0 ⁇ ⁇ 100.
  • the fiber obtained in the example was embedded in an epoxy resin, frozen by a FC ⁇ 4E Cryo sectioning system manufactured by Reichert Co., Ltd., and cut under a Reichert-Nissei ultracut N (concave-convex microscope) equipped with a masonry knife. Then, the cutting surface, that is, the fiber cross section, was plated under a platinum-palladium-gold alloy, and observed at 1000 times using an S-4000 electron microscope (SEM) manufactured by Hitachi, and a micrograph of the fiber cross section was taken.
  • SEM S-4000 electron microscope
  • the length of this portion is the maximum value r M of the length of the core component exposed at the surface portion and the length of the core component exposed at the surface portion.
  • the sum r S .
  • the maximum value of the core component length exposed on the surface portion of each fiber cross section and the core component exposed on the surface portion are obtained. After the sum of the lengths, 30 average values are taken as the maximum value r M of the length of the core component exposed on the surface portion, and the sum of the lengths of the core components exposed at the surface portion r S .
  • r M /R and r S /R are the outer peripheral length R of the fiber cross section calculated by the above formula, the maximum value r M of the core component length exposed on the surface portion, and the length of the core component exposed on the surface portion. The sum r S is calculated.
  • the ratio r S /R r S /R of the total length R S of the cross-sectional outer perimeter R to the core component exposed at the surface portion.
  • the fiber obtained in the example was used as a sample, and 2 g of a cylinder was produced by a NCR-BL (3 inch and a half (8.9 cm), 27 needles) of the Incheon Industrial Co., Ltd., and then contained in sodium carbonate 1 g/L. After refining for 20 minutes at 80 ° C in an aqueous solution of BK-80 surfactant, it was dried in a hot air dryer at 60 ° C for 60 minutes to obtain a cylinder after refining.
  • the moisture absorption rate (%) is calculated from the water content of JIS L1096:2010 (the fabric test method of the woven fabric and the woven fabric) 8.10 based on the cylinder knitted fabric after the refining and the hot water treatment.
  • JIS L1096:2010 the fabric test method of the woven fabric and the woven fabric
  • W1 the weight of the package
  • the moisture absorption rate MR1 (%) after standing for 24 hours from the dry state to 20 ° C and humidity 65% RH atmosphere was calculated from the weights W1 and W3 of the polymer, and the tube was knitted according to the following formula.
  • the weights W2 and W3 were calculated from the absolute dry state to a moisture absorption rate MR2 (%) after standing for 24 hours in an atmosphere of 30 ° C and a humidity of 90% RH, and then the moisture absorption rate difference ( ⁇ MR) was calculated according to the following formula. Further, one sample was measured five times, and the average value was taken as the moisture absorption rate difference ( ⁇ MR).
  • Hygroscopic rate difference ( ⁇ MR) (%) MR2-MR1.
  • the hot-water treated tubular package obtained by the above I was gas-plated with a platinum-palladium-gold alloy, and was observed under a 1000-fold condition by a Hitachi electronic microscope (SEM) S-4000 model, and 5 fields of view were randomly taken. Microscope photo. Among the five photographs obtained, the total of the melted parts was melted.
  • the hot-water treated tubular package obtained by the above I was gas-plated with a platinum-palladium-gold alloy, and was observed under a 1000-fold condition by a Hitachi electronic microscope (SEM) S-4000 model, and 5 fields of view were randomly taken. Microscope photo. Among the five photographs obtained, the total number of sites where the sheath was broken was used as a sheath rupture.
  • the refining cylinder was prepared in the same manner as in the above I, and heat-set at 160 ° C for 2 minutes. After the dry heat setting, the dispersion was added with 1.3 wt% of the disperse dye Kayalon Polyester made by Nippon Kayaku. Blue UT-YA was adjusted in a dyeing solution having a pH of 5.0 at a bath ratio of 1:100, a dyeing temperature of 130 ° C, and a dyeing time of 60 minutes.
  • the bath ratio is 1:100, dyeing in a dyeing solution adjusted to a pH of 4.0 with a cationic dye Kayacrtyl Blue 2RL-ED prepared by adding 1.0 wt% of a Japanese chemical.
  • the dyeing was carried out under the conditions of a temperature of 130 ° C and a dyeing time of 60 minutes.
  • the dyed tube-shaped fabric was judged by the inspectors of five people who had more than 5 years of quality judgment experience.
  • the dyeing was very uniform, there was no staining at all, it was judged as ⁇ , [staining was basically uniform, basically no staining] ⁇ , [Cannot say that the uniform dyeing, slightly faint staining] was judged as ⁇ , [no uniform dyeing, and there was significant staining], and it was judged as ⁇ , and ⁇ and ⁇ were judged as pass.
  • the dyed cylinders obtained by the above-mentioned L are judged by the inspectors who have 5 years of experience in quality judgment, and [when there is no hairiness and excellent quality], it is judged as ⁇ , [there is basically no hairiness, and the quality is excellent]
  • ⁇ [there is basically no hairiness, and the quality is excellent]
  • the tubular product prepared in the same manner as in the above item I was subjected to hot water treatment at a bath ratio of 1:100, a treatment temperature of 130 ° C, and a treatment time of 20 minutes, and then dried in a hot air dryer at 60 ° C for 60 minutes. Forming a tubular braid after hot water treatment.
  • the cylinders before and after the hot water treatment were respectively measured by a color difference meter (USTC-datacolor), the b value of the cylinder before the hot water treatment was b1, and the value of the drum after the hot water treatment was b value.
  • polyethylene glycol manufactured by Sanyo Chemical Industries, Ltd. PEG 6000S
  • IV polyethylene terephthalate
  • the sheath-type composite spinneret (number of holes: 36, sectional shape: Fig. 1 (a)) was discharged, and the yarn was spun.
  • the spun yarn is cooled under cold air with a wind temperature of 20 ° C and a wind speed of 20 m / min.
  • the oil feed device is subjected to oil-contracting, and the first section of the roller is rotated at 2,500 m/min, and the first section of the roller is passed.
  • the second stage roller of the same turning speed is taken up to obtain an unstretched yarn of 144 dtex-36f.
  • extension false twisting machine tilting section: friction disk type, heater part: contact type
  • the obtained unstretched yarn was subjected to extension false twisting at a heater temperature of 170 ° C and a magnification of 1.7 times to obtain 84 dtex. -36f fake silk.
  • the evaluation results of the fiber properties, the fabric properties, and the engineering passability of the obtained fibers are shown in Table 1.
  • the number of broken wires at the time of false twist is 0, and the deposits on the heater and the guide rail are hardly found after the false twist, and the engineering passability is extremely good.
  • the hygroscopicity after the hot water treatment is not substantially lowered, and the hygroscopicity after the hot water treatment is also good.
  • the fusion between the fibers was not found, and although the sheath was slightly broken, the level of dyeing and quality reached an acceptable level.
  • the false twist yarn was obtained in the same manner as in Example 1 except that the core/sheath composite ratio was changed as shown in Table 1.
  • a false twist yarn was obtained in the same manner as in Example 1 except that the cross-sectional shape was changed as shown in Table 1.
  • Example 1 In the same manner as in Example 1, the false twist yarn was obtained in the same manner as in Example 1 except that the number of the orifices of the spinneret of Example 11 was 72, the discharge amount of Example 12 was 28 g/min, and the number of the orifices of the spinneret was changed to 72.
  • the number average molecular weight, the copolymerization ratio, and the core/sheath recombination ratio of the polyethylene glycol copolymerization component of the core component are shown in Table 2, respectively.
  • Comparative Example 3 except that the heater temperature of the extension false twister was 150 ° C, In the same manner as in Example 1, a false twist yarn was obtained.
  • the evaluation results of the fiber properties, the fabric properties, and the engineering passability of the obtained fibers are shown in Table 2.
  • Examples 13 to 19 when the number average molecular weight, the copolymerization ratio, and the core/sheath recombination ratio of the polyethylene glycol were changed, the properties of the workability and the fabric were good.
  • Comparative Example 1 the hygroscopicity after refining was lowered, and as a result, the hygroscopicity after hot water treatment was extremely poor.
  • Comparative Example 2 Although the hygroscopicity after refining was relatively high, the hygroscopicity after the hot water treatment was greatly lowered, the hygroscopicity after the hot water treatment was low, and the engineering passability was poor, and the leveling property and the quality did not reach the acceptable level.
  • the extrapolation melting onset temperature of the core component was low, and the extrapolation melting onset temperature of the core component of Comparative Example 4 was not detected, because there was no crystallinity, the filaments and deposits were extremely large, and the engineering passability was extremely high. bad. At the same time, it was found that there were many fusions and sheath ruptures, and the level of dyeing and quality did not reach the qualified level.
  • the composition, the spinning temperature was 255 ° C, and the core/sheath composite ratio was as shown in Table 3.
  • the temperature of the heater of the extension false twisting machine was changed to 150 ° C, and the same procedure as in Example 7 was carried out. The method produces a false twist.
  • Comparative Example 7 Although the hygroscopicity after refining was high, the hygroscopicity after hot water treatment was largely lowered, the hygroscopicity after hot water treatment was low, and the engineering passability was poor, and the leveling property and quality were not at a satisfactory level. Since the extrapolation melting initiation temperature of the core component of Comparative Example 8 was low, there were many broken wires and deposits, and the engineering passability was extremely poor. Further, the hygroscopicity after refining is low, and as a result, the hygroscopicity after hot water treatment is extremely poor.
  • the core component was nylon 6 obtained by copolymerization of polyethylene glycol having a number average molecular weight of 3,400 g/mol (PEG4000S manufactured by Sanyo Chemical Industries Co., Ltd.), and Example 31 was changed except for the "PEBAX MH1657” manufactured by ARKEMA. 1 The same method was used to make false silk.
  • the core component was "PAS-40N” manufactured by Toray Industries, and the false twist yarn was obtained in the same manner as in Example 1 except that the temperature of the heater of the extension false twisting machine was changed to 150 °C.
  • a false twist yarn was obtained in the same manner as in Example 1 except that the cross-sectional shape was changed as shown in Fig. 2 .
  • Table 4 shows the results of fiber properties, fabric properties, and engineering passability of the obtained fibers. There is no broken wire, almost no deposits are found, and the engineering passability is good. However, although there was no fusion, since the core component hygroscopic polymer was completely covered by the sheath component, and the volume of the hygroscopic polymer was expanded during hot water treatment, it was found that a plurality of sheath portions were broken. As a result, the level of dyeing and quality did not reach the acceptable level.
  • the core component of the comparative example 10 is polyethylene terephthalate copolymerized with polyethylene glycol having an average molecular weight of 3000 g/mol of 17 wt%.
  • the core component of Comparative Example 11 was polyethylene terephthalate copolymerized with 17 wt% polyethylene glycol having an average molecular weight of 3000 g/mol.
  • the sheath component was nylon 6, and a false twist yarn was obtained in the same manner as in Example 7 except that the core/sheath composite ratio was changed as shown in Table 4.
  • the sheath component was nylon 6 in which 8 wt% of an average molecular weight of 20,000 g/mol of polyethylene glycol was copolymerized, and a pseudofilament yarn was obtained in the same manner as in Example 1 except that the core/sheath recombination ratio was changed as shown in Table 4.
  • the evaluation results of the fiber properties, the fabric properties, and the engineering passability of the obtained fibers are shown in Table 4. Because the sheath component is sucking The wet polymer has a large amount of hygroscopic polymer exposed on the surface, a large number of broken wires and deposits, and poor engineering passability. At the same time, it was found that the fusion and sheath rupture did not reach the acceptable level of dyeing and quality. Moreover, the hygroscopicity after the hot water treatment is low.
  • the core component was polyethylene terephthalate copolymerized with 30 wt% of an average molecular weight of 5000 g/mol of polyethylene glycol, and the sheath component was copolymerized by 1.5.
  • the sheath component is copolymerized with 1.5 mol% sodium isophthalate-5-sulfonate, 1.0 wt% number average molecular weight 1000 g/mol.
  • a false twist yarn was obtained in the same manner as in Example 7 except that the fiber cross-section r M /R and r S /R were changed as shown in Table 4.
  • a false twist yarn was obtained in the same manner as in Example 1 except that the core-sheath composite ratio was changed as shown in Table 4, for example.
  • a false twist yarn was obtained in the same manner as in Example 1 except that a single-component spinneret (pore number: 36, round hole) was used.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Multicomponent Fibers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Woven Fabrics (AREA)

Abstract

L'invention concerne une fibre composite de type âme-gaine, un élément âme et un élément gaine de la fibre étant tous deux constitués par des polymères cristallins, et l'élément âme étant constitué d'un polymère hygroscopique ; dans une section transversale de la fibre composite de type âme-gaine, au moins une partie de l'élément âme est exposée à la surface, le rapport rS/R du périmètre extérieur R de la section transversale à la somme de longueur rS de l'élément âme exposé à la surface étant entre 0,05 et 0,40 ; et la température de début de fusion extrapolée de la fibre composite de type âme-gaine est égale ou supérieure à 150 °C, et la différence de taux hygroscopique ΔMR après un traitement à l'eau chaude est entre 2,0 % et 10,0 %. L'ingénierie d'extension et de fausse torsion de la fibre peut inhiber la fusion, et il y a peu de ruptures de fil et d'ébouriffage de fil, mais une bonne propriété de passage d'ingénierie, et moins de moucheture et d'ébouriffage lors de la formation d'un tissu tressé et d'autres structures fibreuses ; de plus, la fracturation dans la partie gaine lorsque le polymère hygroscopique se dilate en volume pendant la teinture et d'autres traitements à l'eau chaude peut être inhibée tout en fournissant une excellente qualité, et la dissolution du polymère hygroscopique peut être inhibée ; en outre, il y a une excellente propriété hygroscopique après un traitement à l'eau chaude.
PCT/CN2016/111763 2015-12-28 2016-12-23 Fibre composite de type âme-gaine, fils à fausse torsion, et structure fibreuse WO2017114313A1 (fr)

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JP2018534054A JP2019502036A (ja) 2015-12-28 2016-12-23 芯鞘型複合繊維、仮撚糸及び繊維構造体
KR1020187021318A KR20180097712A (ko) 2015-12-28 2016-12-23 코어-시스형 복합 섬유, 가연사 및 섬유 구조체
CN201680057381.4A CN108138377A (zh) 2015-12-28 2016-12-23 芯鞘型复合纤维、假捻丝和纤维构造体

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WO2018147251A1 (fr) * 2017-02-09 2018-08-16 東レ株式会社 Fibres composites thermocollantes à âme enrobée, et tricot chaîne
WO2019176811A1 (fr) * 2018-03-13 2019-09-19 東レ株式会社 Fibre composite de type île et mer hautement hygroscopique, structure de fibre et composition de polyester
CN111560676A (zh) * 2020-05-11 2020-08-21 江苏华信亚麻纺织有限公司 一种亚麻包芯纱结构

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JP6871892B2 (ja) * 2018-11-26 2021-05-19 本田技研工業株式会社 芯鞘複合繊維および芯鞘複合繊維の製造方法
WO2020262511A1 (fr) * 2019-06-28 2020-12-30 東レ株式会社 Fil composite âme-gaine et tissu
CN110894622B (zh) * 2019-11-06 2022-01-28 青岛大学 粘结强度可控的类橘瓣形结构复合纤维及其制备工艺
CN111101270B (zh) * 2019-12-29 2021-08-13 江苏恒力化纤股份有限公司 一种抗菌运动针织面料的制备方法
CN111534889A (zh) * 2020-06-24 2020-08-14 江苏微笑新材料科技有限公司 一种抗静电、吸湿可染皮芯型复合纤维及其制备方法

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CN111560676A (zh) * 2020-05-11 2020-08-21 江苏华信亚麻纺织有限公司 一种亚麻包芯纱结构
CN111560676B (zh) * 2020-05-11 2022-07-08 江苏华信亚麻纺织有限公司 一种亚麻包芯纱结构

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