WO2021176829A1 - Fibre composite âme-gaine pour cheveux artificiels, produit de coiffure comprenant ladite fibre, et procédé de production associé - Google Patents

Fibre composite âme-gaine pour cheveux artificiels, produit de coiffure comprenant ladite fibre, et procédé de production associé Download PDF

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Publication number
WO2021176829A1
WO2021176829A1 PCT/JP2021/000047 JP2021000047W WO2021176829A1 WO 2021176829 A1 WO2021176829 A1 WO 2021176829A1 JP 2021000047 W JP2021000047 W JP 2021000047W WO 2021176829 A1 WO2021176829 A1 WO 2021176829A1
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Prior art keywords
core
sheath
fiber
composite fiber
artificial hair
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PCT/JP2021/000047
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English (en)
Japanese (ja)
Inventor
安友徳和
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株式会社カネカ
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Priority to JP2022504996A priority Critical patent/JP7576608B2/ja
Publication of WO2021176829A1 publication Critical patent/WO2021176829A1/fr
Priority to US17/815,213 priority patent/US20220361611A1/en

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    • 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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
    • A41G3/00—Wigs
    • A41G3/0083—Filaments for making wigs
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
    • A41G5/00—Hair pieces, inserts, rolls, pads, or the like; Toupées
    • 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
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • 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
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H3/00—Dolls
    • A63H3/36—Details; Accessories
    • A63H3/44—Dolls' hair or wigs; Eyelashes; Eyebrows

Definitions

  • the present invention relates to a core-sheath composite fiber for artificial hair that can be used as a substitute for human hair, a headdress product containing the same, and a method for producing the same.
  • Human hair has traditionally been used in headdress products such as wigs, hair wigs, hair attachments, hair bands, and doll hair.
  • headdress products such as wigs, hair wigs, hair attachments, hair bands, and doll hair.
  • it has become difficult to obtain human hair and there is a demand for artificial hair to replace human hair. It is increasing.
  • Such artificial hair is required to have a tactile sensation and appearance similar to human hair
  • the synthetic fibers used as the material thereof include acrylic fibers, vinyl chloride fibers, vinylidene chloride fibers, polyester fibers, and polyamides.
  • Examples include system fibers and polyolefin fibers.
  • a core-sheath composite fiber for artificial hair which has a texture close to that of human hair and has excellent durability and heat resistance
  • a core-sheath composite fiber containing polyester as a core component and polyamide as a sheath component has been developed (patented). Document 1).
  • Patent Document 1 by setting the viscosity ratio a / b of the melt viscosity a of polyester and the melt viscosity b of polyamide at 285 ° C. to 0.5 to 2.5, the durability and heat resistance of the core-sheath composite fiber for artificial hair are set. It is enhanced to sex.
  • the fiber described in Patent Document 1 is a core-sheath composite fiber having polyester as a core component and polyamide as a sheath component, but the polyamide used as a sheath component is curled with a hair iron or the like.
  • the settability is worse than that of polyester, so that the curl settability is not sufficient as the core-sheath composite fiber for artificial hair, and further improvement is required.
  • the present invention provides a core-sheath composite fiber for artificial hair having a tactile sensation close to that of human hair and excellent combability, and also having good curl settability, a headdress product containing the same, and a method for producing the same.
  • the present invention is a core-sheath composite fiber for artificial hair including a core portion and a sheath portion, and the core-sheath composite fiber for artificial hair has a flat bilobed or elliptical cross-sectional shape.
  • the core-sheath ratio in the fiber cross section is an area ratio of core: sheath of 3: 7 to 8: 2
  • the sheath portion is composed of a polyamide-based resin composition containing a polyamide-based resin
  • the core portion is A core-sheath composite fiber for artificial hair, which has a deformed flat bilobed shape or a deformed elliptical cross-sectional shape having a pair of convex portions protruding from the central side toward the outer peripheral side along the minor axis direction of the fiber cross section.
  • the present invention also relates to a headdress product comprising the core-sheath composite fiber for artificial hair in one or more embodiments.
  • the present invention is also a method for producing a core-sheath composite fiber for artificial hair according to one or more embodiments, wherein the core resin composition and the sheath resin composition are melt-spun using a core-sheath type composite nozzle.
  • the present invention relates to a method for producing a core-sheath composite fiber for artificial hair, which includes a step of making a core-sheath composite fiber.
  • the core-sheath composite fiber for artificial hair of the present invention not only has a tactile sensation close to that of human hair and excellent combability, but also has sufficiently excellent curl settability, and is suitable as a material for headdress products.
  • a core-sheath composite fiber for artificial hair which not only has a tactile sensation close to that of human hair and excellent combability, but also has sufficiently excellent curl settability.
  • FIG. 1 is a schematic view showing a fiber cross section of a core-sheath composite fiber for artificial hair according to one or more embodiments of the present invention.
  • FIG. 2 is a laser micrograph of a fiber cross section of the fiber of Example 1.
  • FIG. 3 is a laser micrograph of a fiber cross section of the fiber of Comparative Example 1.
  • FIG. 4 is a laser micrograph of a fiber cross section of the fiber of Comparative Example 3.
  • the present invention is an invention made to solve the above-mentioned problems of the prior art, that is, a core-sheath composite fiber for artificial hair having excellent curl settability (hereinafter, also simply referred to as "core-sheath composite fiber").
  • core-sheath composite fiber for artificial hair having excellent curl settability
  • the core-sheath composite fiber for artificial hair has a flat bilobed or elliptical cross-sectional shape, preferably a flat bilobed cross-sectional shape.
  • the core portion is a deformed flat bilobed shape having a pair of convex portions protruding from the center side toward the outer peripheral side along the short axis direction of the fiber cross section, or the outer peripheral side from the center side along the short axis direction of the fiber cross section. It has a deformed elliptical cross-sectional shape with a pair of convex portions protruding toward, preferably a deformed flat bilobed cross-sectional shape.
  • a flat bilobed shape is a combination of two leaf shapes selected from the group consisting of a circular shape and an elliptical shape through a recess, and the circular or elliptical shape referred to here does not necessarily have to draw a continuous arc. It also includes a substantially circular or substantially elliptical shape that is partially deformed if it is not a sharp angle.
  • the deformed flat bilobed shape is a deformed flat bilobed shape, and is a flat bilobed shape having a pair of convex portions protruding from the central side toward the outer peripheral side along the minor axis direction of the fiber cross section.
  • the two leaf shapes selected from the circular and elliptical groups are connected via a concave portion
  • the two leaf shapes selected from the circular and elliptical groups are convex. It will be connected via.
  • the fibers derived from additives and the unevenness of 2 ⁇ m or less generated on the outer circumference of the core portion, which may be contained in the core-sheath composite fiber for artificial hair of the present invention, shall not be considered.
  • FIG. 1 is a schematic view showing a fiber cross section of a core-sheath composite fiber for artificial hair according to one or more embodiments of the present invention.
  • the core-sheath composite fiber 1 for artificial hair of the embodiment includes a sheath portion 10 and a core portion 20, and the core-sheath composite fiber 1 for artificial hair is a flat bilobed shape in which two ellipses are connected via a recess. Has a cross-sectional shape of.
  • the straight line having the maximum length is the long axis of the fiber cross section among the straight lines connecting arbitrary two points on the outer periphery of the fiber cross section so as to be parallel to the line symmetry axis and the line symmetry axis.
  • the direction of the straight line and the direction parallel to it correspond to the long axis direction.
  • the straight line connecting the two points having the maximum length corresponds to the short axis of the fiber cross section, and the straight line corresponds to the short axis of the fiber cross section.
  • the direction parallel to it correspond to the minor axis direction.
  • L length of the long axis of the fiber cross section
  • S length of the short axis of the fiber cross section
  • the core portion 20 is a deformed flat bilobed shape having a pair of convex portions 30 protruding from the central side toward the outer peripheral side along the minor axis direction of the fiber cross section, and the two elliptical shapes are formed. It is connected via the convex portion 30.
  • the core portion 20 can be said to be a deformed ellipse having a pair of convex portions 30 protruding from the center side toward the outer peripheral side along the minor axis direction of the fiber cross section.
  • the length of the core cross section long axis which is the maximum straight line among the straight lines connecting arbitrary two points on the outer circumference of the core cross section so as to be parallel to the line symmetry axis and the line symmetry axis ( Lc) and any two points on the outer circumference of the fiber cross section so as to be perpendicular to the long axis of the core cross section
  • the core cross section is a straight line connecting the two points that have the maximum length. It is preferable that the length of the minor axis (referred to as Sc) satisfies the following equation (2).
  • the core-sheath composite fiber for artificial hair has a flat bilobed fiber cross-sectional outer shape, so that the flat region on the fiber surface is reduced, and the flat region is prominent in light. It has low reflection and tends to have a gloss similar to that of human hair.
  • the core-sheath composite fiber for artificial hair according to one or more embodiments of the present invention preferably has a surface surface, that is, an outer peripheral shape of the fiber cross section, which is composed of smooth irregularities. The contact area when passed is reduced, and a tactile sensation close to that of human hair and good combability are realized.
  • the core portion has a pair of convex portions along the minor axis direction of the fiber in the fiber cross section, which improves the curl settability.
  • the fiber cross section that is, the outer peripheral shape of the sheath portion has a flat bilobed cross-sectional shape, which is a preferable form, a connecting line connecting the opposing concave portions of the fiber cross section and a pair of convex portions of the core portion.
  • the core-sheath composite fiber for artificial hair has a flat bilobed fiber cross section so that the direction of the connecting line connecting the recesses and the direction parallel thereto, that is, the minor axis of the fiber. Due to the fact that the bending moment in the direction tends to be smaller than the bending moment in the major axis direction of the fibers intersecting with the connecting line, preferably orthogonal fibers, it tends to bend in the minor axis direction when bending deformation is applied.
  • the cross-sectional shape of the core portion has a pair of convex portions protruding from the center side to the outer peripheral side in opposite directions along the minor axis direction of the fiber, so that the core portion and the sheath portion in the minor axis direction of the fiber are formed. Since the fiber has a substantially large core line segment ratio, which indicates the ratio of the occupied line segment, even if the polyamide resin content of the entire fiber is high, the polyester resin is used in the minor axis direction of the fiber. By supplementing the properties of the polyamide-based resin with low curl settability, fibers with extremely high curl settability can be obtained.
  • the core-sheath ratio of the core-sheath composite fiber for artificial hair is in the range of 3: 7 to 8: 2, preferably in the range of 4: 6 to 7: 3, in terms of area ratio.
  • the core-sheath ratio is within the above-mentioned range, the bending moment as a physical property related to the tactile sensation and texture becomes close to that of human hair, so that artificial hair of the same quality as human hair can be easily obtained.
  • the ratio of the core part When the ratio of the core part is small, the bending moment tends to be smaller than that of human hair. On the other hand, when the ratio of the core portion is large, the flexural rigidity value tends to be large, and the thickness of the layer in the cross section of the sheath portion becomes extremely thin, so that the core is easily exposed. There is also the possibility that a problem such as peeling of the sheath from the core may occur. It is preferable that the core portion is not exposed on the fiber surface and is completely covered with the sheath portion.
  • the cross-sectional shape of the fiber and the core portion and the core-sheath ratio described above can be controlled by using a nozzle (hole) having a shape close to the target cross-sectional shape.
  • the core-sheath composite fiber for artificial hair preferably has a single fiber fineness of 10 dtex or more and 150 dtex or less, more preferably 30 dtex or more and 120 dtex or less, and further preferably 40 dtex or more and 100 dtex or less. Particularly preferably, it is 50 dtex or more and 90 dtex or less.
  • the core-sheath composite fibers for artificial hair do not necessarily have all the fibers having the same fineness and cross-sectional shape as an aggregate of fibers, for example, a fiber bundle, and have different fineness and cross-sectional shape. Fibers having a shape may be mixed.
  • the sheath portion is composed of a polyamide-based resin composition containing a polyamide-based resin, that is, a polyamide-based resin composition containing a polyamide-based resin as a main component, so that the tactile sensation is improved. ..
  • the "polyamide-based resin composition containing a polyamide-based resin as a main component” means 67 weight of the polyamide-based resin when the total weight of the polyamide-based resin composition is 100% by weight. It means that it is contained in an amount of% or more, preferably 75% by weight or more, more preferably 85% by weight or more, further preferably 90% by weight or more, and further preferably 95% by weight or more.
  • the polyamide resin is nylon obtained by polymerizing one or more selected from the group consisting of lactam, a mixture of aminocarboxylic acid, dicarboxylic acid and diamine, a mixture of dicarboxylic acid derivative and diamine, and a salt of dicarboxylic acid and diamine. Means resin.
  • lactam examples include, but are not limited to, 2-azetidineone, 2-pyrrolidinone, ⁇ -valerolactam, ⁇ -caprolactam, enantractam, caprilactam, undecalactam, laurolactam and the like. .. Of these, ⁇ -caprolactam, undecalactam, and laurolactam are preferable, and ⁇ -caprolactam is particularly preferable. These lactams may be used alone or in a mixture of two or more.
  • aminocarboxylic acid examples are not particularly limited, but for example, 6-aminocaproic acid, 7-aminoheptanoic acid, 8-aminooctanoic acid, 9-aminononanoic acid, 10-aminodecanoic acid, 11-aminoundecanoic acid, 12 -Aminododecanoic acid and the like can be mentioned. Of these, 6-aminocaproic acid, 11-aminoundecanoic acid, and 12-aminododecanoic acid are preferable, and 6-aminocaproic acid is particularly preferable. These aminocarboxylic acids may be used alone or in a mixture of two or more.
  • dicarboxylic acid used in a mixture of dicarboxylic acid and diamine, a mixture of dicarboxylic acid derivative and diamine, or a salt of dicarboxylic acid and diamine are not particularly limited, but for example, oxalic acid, malonic acid, succinic acid, and glutal.
  • Acids adipic acids, pimelliic acids, suberic acids, azelaic acids, sebacic acids, undecanedioic acids, dodecanedioic acids, brushphosphoric acids, tetradecanedioic acids, pentadecanedioic acids, octadecanedioic acids and other aliphatic dicarboxylic acids, cyclohexanedicarboxylic acids, etc.
  • aromatic dicarboxylic acids such as alicyclic dicarboxylic acid, phthalic acid, isophthalic acid, terephthalic acid, and naphthalenedicarboxylic acid.
  • adipic acid, sebacic acid, dodecanedioic acid, terephthalic acid, and isophthalic acid are preferable, and adipic acid, terephthalic acid, and isophthalic acid are particularly preferable.
  • These dicarboxylic acids may be used alone or in a mixture of two or more.
  • dicarboxylic acid and diamine it is used as a mixture of dicarboxylic acid and diamine, a mixture of dicarboxylic acid derivative and diamine, or a salt of dicarboxylic acid and diamine.
  • diamine are not particularly limited, but for example, 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 2-methyl-1,5-diaminopentane (MDP), 1 , 7-Diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane, 1,10-diaminodecane, 1,11-diaminoundecane, 1,12-diaminododecane, 1,13-diaminotridecane, 1, 14-diaminotetradecane, 1,15-diaminopentadecane, 1,16-diaminohexadecan, 1,
  • Examples thereof include aliphatic diamines, cyclohexanediamines, alicyclic diamines such as bis- (4-aminohexyl) methane, aromatic diamines such as m-xylylene diamine and p-xylylene diamine. Of these, aliphatic diamines are particularly preferable, and hexamethylenediamine is particularly preferably used. These diamines may be used alone or in a mixture of two or more.
  • the polyamide resin (sometimes referred to as nylon resin) is not particularly limited, but for example, nylon 6, nylon 66, nylon 11, nylon 12, nylon 6/10, nylon 6/12, nylon 6T and / or 6I. It is preferable to use semi-aromatic nylon containing a unit, a copolymer of these nylon resins, and the like. In particular, a copolymer of nylon 6, nylon 66, nylon 6 and nylon 66 is more preferable.
  • the polyamide-based resin can be produced, for example, by a polyamide-based resin polymerization method in which a polyamide-based resin raw material is heated in the presence or absence of a catalyst. Stirring may or may not occur during the polymerization, but stirring is preferred to obtain a homogeneous product.
  • the polymerization temperature can be arbitrarily set according to the degree of polymerization, reaction yield, and reaction time of the target polymer, but a low temperature is preferable from the viewpoint of the quality of the finally obtained polyamide resin.
  • the reaction rate can also be set arbitrarily. Although there is no limitation on the pressure, it is preferable to reduce the pressure inside the system in order to efficiently extract the volatile components to the outside of the system.
  • the polyamide resin used in the present invention may be terminally sealed with an end-sealing agent such as a carboxylic acid compound and an amine compound, if necessary.
  • an end-sealing agent such as a carboxylic acid compound and an amine compound, if necessary.
  • the concentration of the terminal amino group or the terminal carboxyl group of the obtained nylon resin is lower than that when the terminal blocking agent is not used.
  • the terminal is blocked with a dicarboxylic acid or diamine, the sum of the concentrations of the terminal amino group and the terminal carboxyl group does not change, but the ratio of the concentrations of the terminal amino group and the terminal carboxyl group changes.
  • carboxylic acid compound examples are not particularly limited, but for example, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, capric acid, pelargonic acid, undecanoic acid, lauric acid, tridecanoic acid, myristic acid,
  • Alipid monocarboxylic acids such as myristoleic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, and araquinic acid, alicyclic monocarboxylic acids such as cyclohexanecarboxylic acid and methylcyclohexanecarboxylic acid, benzoic acid, toluic acid, ethyl
  • Aromatic monocarboxylic acids such as benzoic acid and phenylacetic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelli acid, suberic acid, azelaic acid, sebac
  • amine compound examples are not particularly limited, but for example, butylamine, pentylamine, hexylamine, heptylamine, octylamine, 2-ethylhexylamine, nonylamine, decylamine, undecylamine, dodecylamine, tridecylamine, tetra.
  • Aliper monoamines such as decylamine, pentadecylamine, hexadecylamine, octadecylamine, nonadecilamine, and icosylamine, alicyclic monoamines such as cyclohexylamine and methylcyclohexylamine, aromatic monoamines such as benzylamine and ⁇ -phenylethylamine, 1 , 4-Diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 1,7-diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane, 1,10-diaminodecane, 1,11 -Diaminoundecane, 1,12-diaminododecane, 1,13-diaminotridecane, 1,14-diaminotetradecane, 1,15-diaminopentadecan
  • the terminal group concentration of the polyamide resin is not particularly limited, but when it is necessary to improve the dyeability for textile applications or when designing a material suitable for alloying for resin applications, the higher the terminal amino group concentration is. preferable. On the contrary, when it is desired to suppress coloring and gelation under long-term aging conditions, it is preferable that the terminal amino group concentration is low. Furthermore, if you want to suppress lactam regeneration during remelting, yarn breakage during melt spinning due to oligomer formation, mold deposit during continuous injection molding, and die mark generation during continuous extrusion of film, both the terminal carboxyl group concentration and the terminal amino group concentration are both. Lower is preferable.
  • the terminal group concentration may be adjusted depending on the intended use, but both the terminal amino group concentration and the terminal carboxyl group concentration are preferably 1.0 ⁇ 10 -5 to 15.0 ⁇ 10 -5 eq / g, more preferably. It is 2.0 ⁇ 10 -5 to 12.0 ⁇ 10 -5 eq / g, particularly preferably 3.0 ⁇ 10 -5 to 11.0 ⁇ 10 -5 eq / g.
  • a method of adding the terminal sequestering agent a method of adding the terminal sequestering agent at the same time as a raw material such as caprolactam at the initial stage of polymerization, a method of adding the nylon resin during the polymerization, and a method of adding the nylon resin when passing it through a vertical stirring thin film evaporator in a molten state. Etc. are adopted.
  • the terminal sequestering agent may be added as it is, or may be dissolved in a small amount of solvent and added.
  • the polyamide resin is preferably a polyamide resin mainly composed of at least one selected from the group consisting of nylon 6 and nylon 66 from the viewpoint of resin physical properties, versatility and cost.
  • the "polyamide-based resin mainly composed of at least one selected from the group consisting of nylon 6 and nylon 66" is a polyamide containing 80 mol% or more of nylon 6 and / or nylon 66. It means a based resin.
  • the polyamide-based resin composition constituting the sheath portion may contain other resins in addition to the polyamide-based resin.
  • other resins include polyamide-based resins, vinyl chloride-based resins, modaacrylic-based resins, polycarbonate-based resins, polyolefin-based resins, and polyphenylene sulfide-based resins. These may be used alone or in combination of two or more.
  • the core portion is composed of a polyester resin composition containing a polyester resin, that is, a polyester resin composition containing a polyester resin as a main component. It is preferable that the resin is used.
  • the "polyester resin composition containing a polyester resin as a main component” means 67 weights of the polyester resin when the total weight of the polyester resin compositions is 100% by weight. It means that it is contained in an amount of% or more, preferably 75% by weight or more, more preferably 85% by weight or more, further preferably 90% by weight or more, and further preferably 95% by weight or more.
  • the polyester resin is preferably one or more selected from the group consisting of polyalkylene terephthalate and copolymerized polyester mainly composed of polyalkylene terephthalate from the viewpoint of physical properties, versatility, and cost.
  • the "copolymerized polyester mainly composed of polyalkylene terephthalate” refers to a copolymerized polyester containing 80 mol% or more of polyalkylene terephthalate.
  • the polyalkylene terephthalate is not particularly limited, and examples thereof include polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, and polycyclohexanedimethylene terephthalate.
  • the copolymerized polyester mainly composed of polyalkylene terephthalate is not particularly limited, but for example, polyalkylene terephthalate such as polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, and polycyclohexanedimethylene terephthalate is mainly used, and other copolymerization components are used. Examples thereof include copolymerized polyester contained therein.
  • copolymerization components include, for example, isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, paraphenylenedicarboxylic acid, trimellitic acid, pyromellitic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid.
  • Polyvalent carboxylic acids such as dodecanedioic acid and their derivatives; dicarboxylic acids including sulfonates such as 5-sodium sulfoisophthalic acid, 5-sodium sulfoisophthalate dihydroxyethyl and their derivatives; 1,2-propanediol , 1,3-Propanediol, 1,4-Butanediol, 1,6-Hexanediol, Neopentylglycol, 1,4-Cyclohexanedimethanol, Diethyleneglycol, Polyethylene glycol, Trimethylolpropane, Pentaerythritol, 4-Hydroxybenzo Examples thereof include acid, ⁇ -caprolactone, and ethylene glycol ether of bisphenol A.
  • the copolymerized polyester is preferably produced by reacting the main polyalkylene terephthalate with a small amount of other copolymerizing components.
  • the polyalkylene terephthalate a polymer of terephthalic acid and / or a derivative thereof (for example, methyl terephthalate) and alkylene glycol can be used.
  • the copolymerized polyester is a mixture of terephthalic acid and / or a derivative thereof (for example, methyl terephthalate) used for the polymerization of the main polyalkylene terephthalate and alkylene glycol, and a small amount of other copolymerization components such as a monomer or an oligomer. It may be produced by polymerizing the one containing the component.
  • the copolymerized polyester may have the above-mentioned other copolymerization components polycondensed on the main chain and / or side chain of the main polyalkylene terephthalate, and the copolymerization method is not particularly limited.
  • copolymerized polyester mainly composed of polyalkylene terephthalate include, for example, ethylene glycol ether of bisphenol A, 1,4-cyclohexadimethanol, isophthalic acid and dihydroxyethyl 5-sodium sulfoisophthalate mainly composed of polyethylene terephthalate.
  • the copolymerized polyester mainly composed of polyalkylene terephthalate and polyalkylene terephthalate may be used alone or in combination of two or more.
  • polyester mainly composed of terephthalate and copolymerized with isophthalic acid and polyester mainly composed of polyethylene terephthalate and copolymerized with dihydroxyethyl 5-sodium sulfoisophthalate alone or in combination of two or more.
  • the intrinsic viscosity (sometimes referred to as IV value) of the polyester resin is not particularly limited, but is preferably 0.3 or more and 1.2 or less, and more preferably 0.4 or more and 1.0 or less. ..
  • IV value The intrinsic viscosity of the polyester resin is not particularly limited, but is preferably 0.3 or more and 1.2 or less, and more preferably 0.4 or more and 1.0 or less. ..
  • the intrinsic viscosity is 0.3 or more, the mechanical strength of the obtained fiber does not decrease, and there is no risk of drip during the combustion test. Further, when the intrinsic viscosity is 1.2 or less, the molecular weight does not increase too much, the melt viscosity does not become too high, melt spinning becomes easy, and the fineness tends to be uniform.
  • the polyester-based resin composition constituting the core may contain other resins in addition to the polyester-based resin which is the main component resin.
  • other resins include polyamide-based resins, vinyl chloride-based resins, modaacrylic-based resins, polycarbonate-based resins, polyolefin-based resins, and polyphenylene sulfide-based resins. These may be used alone or in combination of two or more.
  • the core-sheath composite fiber for artificial hair is made of a copolymerized polyester mainly composed of polyalkylene terephthalate and polyalkylene terephthalate from the viewpoint of making the tactile sensation and appearance closer to human hair and further improving the curl property and curl retention property. It is preferable to use a polyester resin composition containing at least one polyester resin selected from the above group as a main component, and the sheath portion is mainly composed of at least one selected from the group consisting of nylon 6 and nylon 66. It is more preferable to use a polyamide-based resin composition containing a polyamide-based resin as a main component.
  • a flame retardant may be used in combination from the viewpoint of flame retardancy.
  • the flame retardant include a bromine-containing flame retardant and a phosphorus-containing flame retardant.
  • the phosphorus-containing flame retardant include a phosphate ester amide compound and an organic cyclic phosphorus-based compound.
  • the bromine-based flame retardant is not particularly limited, and for example, a brominated epoxy-based flame retardant; pentabromotoluene, hexabromobenzene, decabromodiphenyl, decabromodiphenyl ether, bis (tribromophenoxy) ethane, tetrabromophthalic acid, and the like.
  • Bromine-containing phosphate esters such as ethylenebis (tetrabromophthalimide), ethylenebis (pentabromophenyl), octabromotrimethylphenylindan, tris (tribromoneopentyl) phosphate; brominated polystyrenes; brominated polybenzyl acrylates Brominated phenoxy resin; Brominated polycarbonate oligomers; Tetrabromobisphenol A, Tetrabromobisphenol A-bis (2,3-dibromopropyl ether), Tetrabromobisphenol A-bis (allyl ether), Tetrabromobisphenol A-bis Tetrabromobisphenol A derivatives such as (hydroxyethyl ether); bromine-containing triazine compounds such as tris (tribromophenoxy) triazine; bromine-containing isocyanuric acid compounds such as tris (2,3-dibromopropyl) isocyanurate. Be done. Above all, from the
  • a brominated epoxy flame retardant whose molecular end is composed of an epoxy group or tribromophenol can be used as a raw material, but the structure of the brominated epoxy flame retardant after melt-kneading is particularly high. Not limited to this, when the total number of the constituent units represented by the following formula (1) and the constituent units in which at least a part of the following formula (1) is modified is 100 mol%, 80 mol% or more is represented by the following formula (1). It is preferably a constituent unit.
  • the structure of the brominated epoxy flame retardant may change at the molecular end after melt-kneading.
  • the molecular end of the brominated epoxy flame retardant may be substituted with an epoxy group or a hydroxyl group other than tribromophenol, a phosphoric acid group, a phosphonic acid group, or the like, and the molecular end is bonded to the polyester component by an ester group. You may.
  • a part of the structure other than the molecular terminal of the brominated epoxy flame retardant may be changed.
  • the secondary hydroxyl group of the brominated epoxy flame retardant and the epoxy group may be bonded to form a branched structure, and if the bromine content in the brominated epoxy flame retardant molecule does not change significantly, the above formula ( A part of the bromine of 1) may be desorbed or added.
  • a polymer type brominated epoxy flame retardant as shown in the following formula (2) is preferably used.
  • m is 1 to 1000.
  • examples of the polymer-type brominated epoxy flame retardant shown in the following formula (2) include brominated epoxy flame retardants manufactured by Sakamoto Yakuhin Kogyo Co., Ltd. (trade name "SR-T2MP"). Commercially available products may be used.
  • the brominated epoxy flame retardant is not particularly limited, but it is preferable that the core portion and / or the sheath portion contains, for example, 5 parts by weight or more and 40 parts by weight or less with respect to 100 parts by weight of the main component resin.
  • a polyamide resin composed of a polyester resin composition containing 5 parts by weight or more and 40 parts by weight or less of a flame retardant, and having a sheath portion mainly composed of at least one selected from the group consisting of nylon 6 and nylon 66. It is preferably composed of a polyamide resin composition containing 5 parts by weight or more and 40 parts by weight or less of a brominated epoxy flame retardant.
  • a flame retardant aid may be used in combination.
  • the flame retardant aid is not particularly limited, but from the viewpoint of flame retardancy, it is preferable to use an antimony compound, a composite metal containing antimony, or the like.
  • antimony compounds include antimony trioxide, antimony tetroxide, antimony pentoxide, sodium antimonate, potassium antimonate, calcium antimonate and the like. From the viewpoint of flame retardancy improving effect and influence on tactile sensation, one or more selected from the group consisting of antimony trioxide, antimony pentoxide, and sodium antimonate is more preferable.
  • the flame retardant aid is not particularly limited, but it is preferable that the core portion and / or the sheath portion contains, for example, 0.1 part by weight or more and 10 parts by weight or less with respect to 100 parts by weight of the main component resin.
  • a flame-retardant aid in the polyamide-based resin composition constituting the sheath portion, appropriate surface irregularities are formed on the fiber surface, and in addition to flame retardancy, it has a low-gloss appearance close to that of human hair.
  • a core-sheath composite fiber for artificial hair can be obtained.
  • the core-sheath composite fiber for artificial hair contains various additives such as a heat resistant agent, a stabilizer, a fluorescent agent, an antioxidant, and an antistatic agent, if necessary, within a range that does not impair the effects of the present invention. You may.
  • the resin compositions constituting the core and the sheath are individually melt-kneaded using various general kneaders. It can be produced by melt-spinning using a core-sheath type composite nozzle.
  • a polyester resin composition obtained by dry-blending each component such as the polyester resin and the brominated epoxy flame retardant described above is melt-kneaded using various general kneaders to form a core component.
  • a polyamide-based resin composition in which each component such as the above-mentioned polyamide-based resin and brominated epoxy flame retardant is dry-blended is melt-kneaded using various general kneaders to form a sheath portion. It can be produced by using it as a sheath component and performing melt spinning using a composite spinning nozzle.
  • Examples of the kneading machine include a single-screw extruder, a twin-screw extruder, a roll, a Banbury mixer, and a kneader. Of these, a twin-screw extruder is preferable from the viewpoint of adjusting the kneading degree and easiness of operation.
  • the temperature of the extruder, gear pump, nozzle, etc. is set to 250 ° C. or higher and 300 ° C. or lower, and in the case of a polyamide resin composition, the extruder, gear pump, nozzle, etc.
  • the temperature of each resin is set to 260 ° C. or higher and 320 ° C. or lower, melt-spun, and the spun yarn is passed through a heating cylinder, and then cooled to the glass transition point or lower of each resin, and 50 m / min or more and 5000 m / min or less.
  • Spinned yarn undrawn yarn
  • the polyester resin composition constituting the core portion is supplied by the core extruder extruder of the melt spinning machine, and the polyamide resin composition constituting the sheath portion is the sheath of the melt spinning machine.
  • a spun yarn is obtained by supplying the molten polymer with a core-sheath type composite spinning nozzle (hole) having a predetermined shape and supplying the molten polymer.
  • the spun yarn is heat-drawn.
  • the stretching may be carried out by either a two-step method in which the spun yarn is wound once and then stretched, or a direct spun drawing method in which the spun yarn is continuously stretched without being wound.
  • the thermal stretching is performed by a one-step stretching method or a two-stage or more multi-step stretching method.
  • a heating roller, a heat plate, a steam jet device, a hot water tank and the like can be used, and these can be used in combination as appropriate.
  • an oil agent such as a fiber treatment agent or a softening agent may be applied to the core-sheath composite fiber for artificial hair to bring the feel and texture closer to human hair.
  • the fiber treatment agent examples include a silicone-based fiber treatment agent and a non-silicone-based fiber treatment agent for improving the tactile sensation and combability.
  • the core-sheath composite fiber for artificial hair may be processed by gear crimping. As a result, the fibers are gently bent, a natural appearance is obtained, and the adhesion between the fibers is lowered, so that the combability is also improved.
  • the fiber is passed between two meshed gears in a state where the fiber is heated to the softening temperature or higher, and the shape of the gear is transferred to develop the fiber bending. Further, if necessary, curls having different shapes can be developed by heat-treating the core-sheath composite fibers for artificial hair at different temperatures in the fiber manufacturing stage.
  • the core-sheath composite fiber for artificial hair can be suitably used for a headdress product.
  • the headdress product is not particularly limited, but preferably one selected from the group consisting of hair wigs, wigs, weaving, hair extensions, blade hairs, hair accessories and doll hairs, and a sufficiently excellent curl set according to the present invention is mentioned. Hair wigs and weaving are more preferable from the viewpoint of exerting sex more effectively.
  • the headdress product may be composed of only the core-sheath composite fiber for artificial hair of the present invention, or may be composed of a combination of other core-sheath composite fibers for artificial hair and natural fibers such as human hair and animal hair. good.
  • the measurement method and evaluation method used in the examples and comparative examples are as follows.
  • the minoge filament is wrapped around a ⁇ 32 mm pipe, curled at 120 ° C for 60 minutes, aged at room temperature (23 ° C) for 60 minutes, and then one end of the curled filament is fixed for fishing.
  • the filament length after lowering and setting was measured. Using this length as an index of curl setability, it was judged that curl set was possible when the length was 17 cm or less.
  • Level C The number of fibers deformed or split by passing the comb 100 times is 30 or more and less than 100, and the resistance becomes stronger in the middle and the comb does not pass once or more 20 times.
  • Level D that occurs with a probability of less than 100 times The number of fibers that have been deformed or split by passing through the comb 100 times is 100 or more, and the resistance becomes stronger in the middle, and the level at which the comb does not pass with a probability of 20 times or more.
  • Example 1 100 parts by weight of polyethylene terephthalate pellets (manufactured by East West Chemical Private Limited, East PET product name “A-12", hereinafter also referred to as "PET"), brominated epoxy flame retardant (manufactured by Sakamoto Pharmaceutical Co., Ltd., product name “SR-T2MP”) 20 parts by weight and 2 parts by weight of sodium antimonate (manufactured by Nihon Seiko Co., Ltd., trade name "SA-A”) are added, and after dry blending, they are supplied to a twin-screw extruder and melted at a barrel set temperature of 280 ° C. Kneading was carried out and pelletized to obtain a polyester resin composition.
  • PET polyethylene terephthalate pellets
  • SR-T2MP brominated epoxy flame retardant
  • SA-A sodium antimonate
  • the pellet-shaped polyester resin composition and the polyamide resin composition are supplied to the extruder, respectively, and extruded from the core-sheath type composite spinning nozzle (hole) having the flatness ratio and shape shown in Table 1 below, and are 40 to 200 m. Winding at a rate of / min, the polyester-based resin composition is used as the core, the polyamide-based resin composition is used as the sheath, and the core-sheath ratio is the area ratio of core: sheath of 5: 5, as shown in Table 1 below. An undrawn yarn of a core-sheath composite fiber having the described cross-sectional shape was obtained.
  • the nozzle flatness ratio is the length of the long axis, which is the maximum length of the line segment connecting arbitrary two points on the outer circumference of the line segment so as to be parallel to the line symmetry axis and the line symmetry axis in the nozzle cross section.
  • the ratio of the length of the minor axis which is the maximum length of the line segment connecting any two points on the outer circumference of the fiber cross section so as to be perpendicular to the major axis.
  • the obtained undrawn yarn was drawn using a heat roll at 85 ° C. at a speed of 45 m / min to obtain a triple drawn yarn, and further, 45 m / min using a heat roll continuously heated to 200 ° C. Take up and heat-treat at the speed of After adhering, it was dried to obtain a core-sheath composite fiber having a single fiber fineness shown in Table 1 below.
  • Example 2 The resin used for the sheath was nylon 66 (manufactured by Toray Industries, Inc., trade name "Amiran CM3001"), the barrel set temperature at the time of pelletization was 280 ° C, the core-sheath ratio was the area ratio, and the core: sheath was 7: 3.
  • a core-sheath composite fiber was obtained in the same manner as in Example 1 except for the above.
  • Example 3 A core-sheath composite fiber was obtained in the same manner as in Example 1 except that the core-sheath ratio was an area ratio and the core: sheath was 8: 2.
  • Example 4 A core-sheath composite fiber was obtained in the same manner as in Example 1 except that the nozzle flatness ratio was 1.4.
  • Example 1 A core-sheath composite fiber was obtained in the same manner as in Example 1 except that the nozzle shape was the shape shown in Table 1 below.
  • Example 2 A core-sheath composite fiber was obtained in the same manner as in Example 2 except that the nozzle shape was the shape shown in Table 1 below.
  • Example 3 A core-sheath composite fiber was obtained in the same manner as in Example 1 except that the nozzle shape was the shape shown in Table 1 below.
  • Example 4 A core-sheath composite fiber was obtained in the same manner as in Example 1 except that the core-sheath ratio was an area ratio, the core: sheath was 2: 8, and the nozzle shape was the shape shown in Table 1 below.
  • Example 5 A core-sheath composite fiber was obtained in the same manner as in Example 1 except that the core-sheath ratio was an area ratio and the core: sheath was 9: 1.
  • Example 6 A core-sheath composite fiber was obtained in the same manner as in Example 4 except that the nozzle shape was the shape shown in Table 1 below.
  • FIG. 2 is a laser micrograph of a fiber cross section of the fiber of Example 1.
  • the fiber in the core-sheath composite fiber for artificial hair, the fiber has a flat bilobed cross-sectional shape, and the core portion protrudes from the center side to the outer peripheral side along the minor axis direction of the fiber cross section. It has a modified flat bilobed cross-sectional shape with a pair of convex parts.
  • FIG. 3 is a laser micrograph of a fiber cross section of the fiber of Comparative Example 1. As shown in FIG. 3, in the core-sheath composite fiber for artificial hair, both the fiber and the core portion have a flat bilobed cross-sectional shape.
  • FIG. 4 is a laser micrograph of a fiber cross section of the fiber of Comparative Example 3. As shown in FIG. 4, in the core-sheath composite fiber for artificial hair, both the fiber and the core portion have a substantially circular cross-sectional shape.
  • the fibers of Examples 1 to 4 had good curl settability, had no exposed core, had a tactile sensation similar to human hair, and had good combability.
  • the fibers of Comparative Example 1, Comparative Example 2 and Comparative Example 6 having no pair of convex portions in the cross-sectional shape of the core portion had poor curl settability.
  • the fiber of Comparative Example 3 having a circular fiber cross section had an unnatural appearance because the fiber surface had no irregularities, and good fibers could not be obtained in terms of both tactile sensation and combing.
  • the fiber of Comparative Example 4 in which the core-sheath ratio was 2: 8 in area ratio resulted in inferior curl setability because the core portion was too small.
  • the fiber of Comparative Example 5 in which the core-sheath ratio was 9: 1 the thickness of the sheath was too thin and the core was exposed, and both the tactile sensation and combing were very poor.
  • a core-sheath composite fiber for artificial hair including a core and a sheath.
  • the core-sheath composite fiber for artificial hair has a flat bilobed or elliptical cross-sectional shape, and the core-sheath ratio in the fiber cross section is an area ratio of core: sheath of 3: 7 to 8: 2.
  • the sheath portion is composed of a polyamide-based resin composition containing a polyamide-based resin.
  • the core portion is an artificial hair having a deformed flat bilobed shape or a deformed elliptical cross-sectional shape having a pair of convex portions protruding from the central side toward the outer peripheral side along the minor axis direction of the fiber cross section.
  • Core sheath composite fiber [2] The core-sheath composite fiber for artificial hair according to [1], wherein the core-sheath composite fiber for artificial hair has a flat bilobed cross-sectional shape, and the core portion has a deformed flat bilobed cross-sectional shape.
  • the core portion is composed of a polyester-based resin composition containing one or more polyester-based resins selected from the group consisting of polyalkylene terephthalate and copolymerized polyester mainly composed of polyalkylene terephthalate. [1] ] Or [2].
  • the core-sheath composite fiber for artificial hair according to any one.
  • a headdress product comprising the core-sheath composite fiber for artificial hair according to any one of [1] to [4].
  • the headdress product according to [5] which is a kind selected from the group consisting of hair wigs, wigs, weaving, hair extensions, blade hairs, hair accessories and doll hairs.
  • a method for producing a core-sheath composite fiber for artificial hair which comprises a step of melt-spinning.

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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)
  • Multicomponent Fibers (AREA)

Abstract

Dans un ou plusieurs modes de réalisation, la présente invention concerne une fibre composite âme-gaine pour cheveux artificiels comprenant une partie âme et une partie gaine, ladite fibre composite âme-gaine pour cheveux artificiels étant caractérisée en ce qu'elle présente une section transversale étant une forme plate à deux lobes ou une forme elliptique, et étant caractérisée en ce que le rapport entre la zone d'âme et la zone de gaine dans une section transversale de la fibre est de 3:7-8:2 (âme : gaine), la partie gaine étant constituée d'une composition de résine à base de polyamide contenant une résine à base de polyamide, et la partie âme ayant une section transversale étant une forme elliptique modifiée ou une forme bidimensionnelle plate modifiée ayant une paire de parties en saillie qui font saillie vers l'extérieur depuis le centre le long de la direction d'axe court de la section transversale de la fibre. La présente invention concerne : une fibre composite âme-gaine pour cheveux artificiels qui a une texture similaire à celle des cheveux humains, une excellente peignabilité, des propriétés de boucles favorables ; un produit de coiffure comprenant ladite fibre ; et un procédé de production associé.
PCT/JP2021/000047 2020-03-03 2021-01-05 Fibre composite âme-gaine pour cheveux artificiels, produit de coiffure comprenant ladite fibre, et procédé de production associé WO2021176829A1 (fr)

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US17/815,213 US20220361611A1 (en) 2020-03-03 2022-07-27 Core-sheath composite fiber for artificial hair, headwear product including same, and production method for same

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5865033A (ja) * 1981-10-12 1983-04-18 カネボウ株式会社 立毛製品
JPH04370221A (ja) * 1991-06-14 1992-12-22 Teijin Ltd 複合繊維の製造方法
WO2018179803A1 (fr) * 2017-03-30 2018-10-04 株式会社カネカ Fibre composite cœur-gaine pour cheveux artificiels et produit de coiffure comprenant celle-ci

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AP2015008871A0 (en) 2013-06-06 2015-11-30 Kaneka Corp Fiber for artificial hair, and head decoration article including same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5865033A (ja) * 1981-10-12 1983-04-18 カネボウ株式会社 立毛製品
JPH04370221A (ja) * 1991-06-14 1992-12-22 Teijin Ltd 複合繊維の製造方法
WO2018179803A1 (fr) * 2017-03-30 2018-10-04 株式会社カネカ Fibre composite cœur-gaine pour cheveux artificiels et produit de coiffure comprenant celle-ci

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