WO2021014765A1 - Artificial hair fibers - Google Patents

Artificial hair fibers Download PDF

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Publication number
WO2021014765A1
WO2021014765A1 PCT/JP2020/021666 JP2020021666W WO2021014765A1 WO 2021014765 A1 WO2021014765 A1 WO 2021014765A1 JP 2020021666 W JP2020021666 W JP 2020021666W WO 2021014765 A1 WO2021014765 A1 WO 2021014765A1
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WO
WIPO (PCT)
Prior art keywords
artificial hair
resin
polyamide
tensile stress
resin composition
Prior art date
Application number
PCT/JP2020/021666
Other languages
French (fr)
Japanese (ja)
Inventor
喬梓 村岡
武井　淳
Original Assignee
デンカ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by デンカ株式会社 filed Critical デンカ株式会社
Priority to US17/607,281 priority Critical patent/US20220186404A1/en
Priority to CN202080029467.2A priority patent/CN113710837B/en
Priority to JP2021534575A priority patent/JPWO2021014765A1/ja
Publication of WO2021014765A1 publication Critical patent/WO2021014765A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • 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
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/10—Melt spinning methods using organic materials
    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • 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
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
    • 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
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
    • A41G3/00—Wigs
    • A41G3/0083—Filaments for making wigs
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2503/00—Domestic or personal
    • D10B2503/08—Wigs

Definitions

  • the present invention relates to fibers used for artificial hair such as wigs, hair wigs, and hair attachments that can be attached to and detached from the head (hereinafter, simply referred to as "fibers for artificial hair”).
  • Patent Document 1 discloses a fiber for artificial hair in which a resin composition containing a polyamide and a brominated flame retardant is fiberized.
  • the artificial hair fiber is produced by stretching an undrawn yarn formed by melt spinning, but the yarn is not uniformly stretched at the time of stretching, and the yarn is bumped after stretching. Shaped nodes may be formed. If the fibers for artificial hair have knots, there is a problem that the tactile sensation deteriorates.
  • the present invention has been made in view of such circumstances, and provides a fiber for artificial hair in which knot formation is suppressed.
  • the present invention is a fiber for artificial hair in which the resin composition is composed of stretched fibers, and the initial tensile stress of the undrawn yarn at 100 ° C. is F0 and the tensile stress at the time of 2.5 times stretching is set. Assuming that it is F1, an artificial hair fiber in which F1 / F0 of the undrawn yarn obtained by spinning the resin composition is 1.2 or more is provided.
  • an artificial hair fiber in which the generation of knots is suppressed by drawing an undrawn yarn having F1 / F0 of 1.2 or more to produce an artificial hair fiber is obtained. It was found that it could be obtained, and the present invention was completed.
  • the artificial hair fiber of the present embodiment is composed of fibers in which the resin composition is stretched, and the initial tensile stress of the undrawn yarn is F0, and the tensile stress at the time of 2.5 times stretching is F1.
  • the F1 / F0 hereinafter, “F1 / F0 of the resin composition” of the undrawn yarn obtained by spinning the resin composition is 1.2 or more.
  • the tensile stress of the undrawn yarn obtained by spinning the resin composition can be measured under the conditions of temperature: 100 ° C., distance between chucks: 100 mm, and tensile speed: 0.5 m / min.
  • the initial tensile stress F0 is the tensile stress immediately after the start of measurement (specifically, when the undrawn yarn is stretched by 1%), and the tensile stress F1 at the time of 2.5 times stretching is 2.5 times that of the undrawn yarn. It is the tensile stress when stretched.
  • F1 / F0 is an index showing an increase in tensile stress due to stretching.
  • F1 / F0 is large, the portion where the degree of stretching is low is more likely to be stretched. Since the portion where the degree of stretching is low becomes the knot, the occurrence of the knot is suppressed by using the undrawn yarn having a large F1 / F0.
  • F1 / F0 is 1.2 or more, the generation of nodes is suppressed, and when F1 / F0 is 1.3 or more, the generation of nodes is particularly suppressed.
  • F1 / F0 is more preferably 1.4 or more.
  • the upper limit of F1 / F0 is preferably 2.0 or less, more preferably 1.8 or less, and even more preferably 1.6 or less. In this case, it is easy to increase the speed of molten spinning during manufacturing, and the productivity is excellent.
  • the resin composition constituting the artificial hair fiber of the present embodiment contains a base resin and optionally contains an additive such as a flame retardant.
  • the base resin is preferably contained in the resin composition in an amount of 50% by mass or more, more preferably 80% by mass or more. In this case, melt molding of the resin composition becomes easy.
  • the F1 / F0 of the undrawn yarn obtained by spinning the base resin (hereinafter, "F1 / F0 of the base resin") is preferably 1.3 or more, and more preferably 1.4 or more. In this case, F1 / F0 of the resin composition tends to be large.
  • the base resin F1 / F0 is preferably 2.0 or less.
  • the composition of the base resin of the resin composition of the present embodiment is not particularly limited, and is preferably composed of at least one of polyamide, polyester, vinyl chloride and the like.
  • the base resin preferably contains 50% by mass or more of polyamide, and more preferably 80% by mass or more. In this case, fibers for artificial hair having excellent heat resistance and tactile sensation can be easily obtained.
  • the polyamide preferably contains an aliphatic polyamide, and may contain an aliphatic polyamide and a semi-aromatic polyamide having a skeleton obtained by condensation polymerization of an aliphatic diamine and an aromatic dicarboxylic acid.
  • the polyamide preferably contains 50% by mass or more of the aliphatic polyamide, and the base resin more preferably contains 50% by mass or more of the aliphatic polyamide. In this case, the feel of the artificial hair fiber is particularly excellent.
  • the aliphatic polyamide is a polyamide having no aromatic ring, and is synthesized as an aliphatic polyamide by n-nylon formed by ring-opening polymerization of lactam or by a copolymerization reaction of an aliphatic diamine and an aliphatic dicarboxylic acid.
  • N m-nylon can be mentioned.
  • Examples of the aliphatic polyamide include polyamide 6 and polyamide 66. Polyamide 66 is preferable from the viewpoint of heat resistance.
  • semi-aromatic polyamide examples include polyamide 6T, polyamide 9T, polyamide 10T, and modified polyamide 6T, modified polyamide 9T, and modified polyamide 10T obtained by copolymerizing a modifying monomer based on them.
  • polyamide 10T is preferable from the viewpoint of ease of melt molding.
  • Polyester is, for example, PET.
  • the base resin preferably contains a first resin, and the undrawn yarn obtained by spinning the first resin has an F1 / F0 (hereinafter, “F1 / F0 of the first resin”) of 1.3 or more. Is preferable. In this case, F1 / F0 of the resin composition tends to be large.
  • the content of the first resin in the base resin is, for example, 30% by mass or more, preferably 50% by mass or more, more preferably 65% by mass or more, still more preferably 80% by mass or more. In this case, F1 / F0 of the resin composition tends to be further increased.
  • the first resin preferably has a melt viscosity of 100 (Pa ⁇ s) or more at 300 ° C. and a shear rate of 2400 (1 / s). In this case, the value of F1 / F0 of the first resin tends to be high.
  • the melt viscosity of the first resin under the above conditions is preferably 110 (Pa ⁇ s) or more. In this case, the value of F1 / F0 of the first resin tends to be high.
  • the first resin is preferably a polyamide, more preferably an aliphatic polyamide, further preferably a polyamide 6 or a polyamide 66, and even more preferably a polyamide 66.
  • the value of F1 / F0 of the first resin tends to be particularly high.
  • the artificial hair fiber of the present invention preferably contains a flame retardant.
  • the flame retardant is preferably a bromine-based flame retardant.
  • the amount of the flame retardant added is preferably 3 to 30 parts by mass, more preferably 5 to 25 parts by mass, and more preferably 10 to 25 parts by mass with respect to 100 parts by mass of the base resin. This is because in such a case, the appearance, styling property, and flame retardancy of the artificial hair fiber are particularly improved.
  • brominated flame retardant examples include brominated phenol condensate, brominated polystyrene resin, brominated benzyl acrylate flame retardant, brominated epoxy resin, brominated phenoxy resin, brominated polycarbonate resin and bromine-containing triazine-based compound. ..
  • the resin composition used in the present embodiment includes additives such as flame retardant aids, fine particles, heat resistant agents, light stabilizers, fluorescent agents, antioxidants, antistatic agents, pigments and dyes, if necessary. , Plasticizer, lubricant and the like can be contained.
  • the method for producing an artificial hair fiber according to an embodiment of the present invention includes a melt spinning step, a drawing step, and an annealing step. Hereinafter, each step will be described in detail.
  • melt spinning process an undrawn yarn is produced by melt spinning the resin composition. Specifically, first, the above-mentioned resin composition is melt-kneaded.
  • various general kneading machines can be used as an apparatus for melt-kneading. Examples of the melt-kneading 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. Fibers for artificial hair can be produced by melt-spinning by a normal melt-spinning method under appropriate temperature conditions depending on the type of polyamide.
  • the single fineness of the artificial hair fiber in the present embodiment is preferably 20 to 100 decitex, more preferably 35 to 80 decitex. In order to achieve this single fineness, it is preferable that the fineness of the fiber (undrawn yarn) immediately after the melt spinning step is 300 decitex or less. If the fineness of the undrawn yarn is small, the draw ratio can be reduced in order to obtain fibers for artificial hair with fine fineness, and the fibers for artificial hair after the drawing treatment are less likely to be glossy. This is because it tends to be easy to maintain the seven-part glossy state.
  • the obtained undrawn yarn is drawn at a drawing ratio of 1.5 to 5.0 times to produce a drawn yarn.
  • a drawn yarn having a fineness of 100 decitex or less can be obtained, and the tensile strength of the fiber can be improved.
  • the draw ratio is preferably 2.0 to 4.0 times. This is because when the draw ratio is appropriately large, the strength of the fiber tends to be developed appropriately, and when the draw ratio is appropriately small, the yarn breakage tends to be less likely to occur during the drawing treatment.
  • the temperature during the stretching treatment is preferably 90 to 120 ° C. This is because if the drawing treatment temperature is too low, the strength of the fibers tends to be low and yarn breakage tends to occur, and if the drawing treatment temperature is too high, the tactile sensation of the obtained fibers tends to be a plastic-like slippery feel.
  • the drawn yarn is preferably heat-treated at a heat treatment temperature of 150 to 200 ° C.
  • a heat treatment temperature of 150 to 200 ° C.
  • the heat treatment may be carried out continuously after the stretching treatment, or may be carried out with a time after being wound once.
  • the heat treatment temperature is preferably 160 ° C. or higher, more preferably 170 ° C. or higher, still more preferably 180 ° C. or higher.
  • the dried polyamide, PET and brominated flame retardant were blended so as to have a hygroscopicity of less than 1000 ppm so as to have the blending ratio shown in Table 1.
  • the numerical values regarding the blending amounts of the polyamide, PET and brominated flame retardants in Table 1 represent parts by mass.
  • the blended material is melt-kneaded at a barrel set temperature of 280 ° C. using a ⁇ 40 mm twin-screw extruder, and then adjusted to a constant discharge rate by a gear pump. From a die with a temperature of 295 ° C. and a hole diameter of 0.5 mm / piece.
  • the undrawn yarn was melt-spun in the vertical direction and wound at a constant speed on a take-up machine installed at a position 2 m directly below the nozzle.
  • the ratio F1 / F0 of the initial tensile stress F0 and the tensile stress F1 at the time of 2.5 times stretching was measured according to the evaluation method and criteria described later. The results are shown in Table 1.
  • the obtained undrawn yarn was drawn at 100 ° C. and then annealed at 180 ° C. to obtain fibers for artificial hair having a predetermined weirdness.
  • the draw ratio was 2.3 times, and the relaxation rate at the time of annealing was 6 to 7%.
  • the relaxation rate at the time of annealing is a value calculated by (rotational speed of the take-up roller at the time of annealing) / (rotational speed of the feeding roller at the time of annealing).
  • melt viscosities in the list below are values measured at 300 ° C. and a shear rate of 2400 (1 / s).
  • PA66 (A): In-house prepared product, F1 / F0 1.55, melt viscosity 163 (Pa ⁇ s)
  • PA66 (B): In-house prepared product, F1 / F0 1.54, melt viscosity 145 (Pa ⁇ s)
  • PA66 (C): In-house prepared product, F1 / F0 1.07, melt viscosity 75 (Pa ⁇ s)
  • the tensile stress of Examples and Comparative Examples was obtained by using Strograph T (manufactured by Toyo Seiki Seisakusho Co., Ltd.) under the conditions of temperature: 100 ° C., distance between chucks: 100 mm, tensile speed: 0.5 m / min, and fiber diameter of 125 ⁇ m. It was measured.
  • the initial tensile stress F0 is the tensile stress immediately after the start of measurement (specifically, when the undrawn yarn is stretched by 1%), and the tensile stress F1 at the time of 2.5 times stretching is 2.5 times that of the undrawn yarn. It is the tensile stress when stretched.
  • melt viscosity The melt viscosities of Examples and Comparative Examples were measured using Capillograph 1D (manufactured by Toyo Seiki Seisakusho Co., Ltd.) at a temperature of 300 ° C. and the shear rate shown in Table 2 according to JIS K 7199.

Abstract

Provided are artificial hair fibers in which formation of a node is suppressed. According to the present invention, provided are artificial hair fibers formed of fibers obtained by stretching a resin composition, wherein, when F0 represents an initial tensile stress at 100°C of unstretched yarn obtained by spinning from the resin composition and F1 represents a tensile stress during 2.5-fold stretching of the unstretched yarn, F1/F0 of the unstretched yarn is not less than 1.2.

Description

人工毛髪用繊維Fiber for artificial hair
　本発明は、頭部に装脱着可能なかつら、ヘアウィッグ、つけ毛等の人工毛髪に用いられる繊維（以下、単に「人工毛髪用繊維」という。）に関するものである。 The present invention relates to fibers used for artificial hair such as wigs, hair wigs, and hair attachments that can be attached to and detached from the head (hereinafter, simply referred to as "fibers for artificial hair").
　特許文献１には、ポリアミドと臭素系難燃剤を含有する樹脂組成物を繊維化した人工毛髪用繊維が開示されている。 Patent Document 1 discloses a fiber for artificial hair in which a resin composition containing a polyamide and a brominated flame retardant is fiberized.
特開２０１１－２４６８４４号公報Japanese Unexamined Patent Publication No. 2011-246844
　特許文献１では、人工毛髪用繊維は、溶融紡糸によって形成した未延伸の糸を延伸することによって作製しているが、延伸の際に糸が均一に延伸されずに、延伸後の糸にコブ状の節が形成される場合がある。人工毛髪用繊維に節が存在していると、触感が悪くなる等の問題がある。 In Patent Document 1, the artificial hair fiber is produced by stretching an undrawn yarn formed by melt spinning, but the yarn is not uniformly stretched at the time of stretching, and the yarn is bumped after stretching. Shaped nodes may be formed. If the fibers for artificial hair have knots, there is a problem that the tactile sensation deteriorates.
　本発明はこのような事情に鑑みてなされたものであり、節の形成が抑制された人工毛髪用繊維を提供するものである。 The present invention has been made in view of such circumstances, and provides a fiber for artificial hair in which knot formation is suppressed.
　本発明によれば、樹脂組成物が延伸された繊維で構成されている人工毛髪用繊維であって、未延伸糸の１００℃における初期引張応力をＦ０と、２．５倍延伸時引張応力をＦ１とすると、前記樹脂組成物を紡糸して得られる未延伸糸のＦ１／Ｆ０が１．２以上である、人工毛髪用繊維が提供される。 According to the present invention, it is a fiber for artificial hair in which the resin composition is composed of stretched fibers, and the initial tensile stress of the undrawn yarn at 100 ° C. is F0 and the tensile stress at the time of 2.5 times stretching is set. Assuming that it is F1, an artificial hair fiber in which F1 / F0 of the undrawn yarn obtained by spinning the resin composition is 1.2 or more is provided.
　本発明者が鋭意検討を行ったところ、Ｆ１／Ｆ０が１．２以上である未延伸糸を延伸して人工毛髪用繊維を製造することによって、節の発生が抑制された人工毛髪用繊維が得られることを見出し、本発明の完成に到った。 As a result of diligent studies by the present inventor, an artificial hair fiber in which the generation of knots is suppressed by drawing an undrawn yarn having F1 / F0 of 1.2 or more to produce an artificial hair fiber is obtained. It was found that it could be obtained, and the present invention was completed.
　以下、本発明の実施形態について説明する。
　本実施形態の人工毛髪用繊維は、樹脂組成物が延伸された繊維で構成されていて、未延伸糸の初期引張応力をＦ０とし、２．５倍延伸時引張応力をＦ１とすると、
　前記樹脂組成物を紡糸して得られる未延伸糸のＦ１／Ｆ０（以下、「樹脂組成物のＦ１／Ｆ０」）が１．２以上である。 Hereinafter, embodiments of the present invention will be described.
The artificial hair fiber of the present embodiment is composed of fibers in which the resin composition is stretched, and the initial tensile stress of the undrawn yarn is F0, and the tensile stress at the time of 2.5 times stretching is F1.
The F1 / F0 (hereinafter, “F1 / F0 of the resin composition”) of the undrawn yarn obtained by spinning the resin composition is 1.2 or more.
＜樹脂組成物＞
　樹脂組成物を紡糸して得られる未延伸糸の引張応力は、温度：１００℃、チャック間距離：１００ｍｍ、引張速度：０．５ｍ／分の条件で測定することができる。初期引張応力Ｆ０は、測定開始直後（詳細には、未延伸糸が１％伸びたとき）の引張応力であり、２．５倍延伸時引張応力Ｆ１は、未延伸糸が２．５倍に延伸されたときの引張応力である。 <Resin composition>
The tensile stress of the undrawn yarn obtained by spinning the resin composition can be measured under the conditions of temperature: 100 ° C., distance between chucks: 100 mm, and tensile speed: 0.5 m / min. The initial tensile stress F0 is the tensile stress immediately after the start of measurement (specifically, when the undrawn yarn is stretched by 1%), and the tensile stress F1 at the time of 2.5 times stretching is 2.5 times that of the undrawn yarn. It is the tensile stress when stretched.
　Ｆ１／Ｆ０は、延伸に伴う引張応力の増大を示す指標である。Ｆ１／Ｆ０が大きいほど、延伸に伴って引張応力が増大する程度（ひずみ硬化の程度）が大きくなることを意味する。Ｆ１／Ｆ０が大きいと、延伸の程度が低い部位ほど延伸されやすくなる。延伸の程度が低い部位が節になるので、Ｆ１／Ｆ０が大きい未延伸糸を用いることによって節の発生が抑制される。具体的には、Ｆ１／Ｆ０が１．２以上である場合に節の発生が抑制され、Ｆ１／Ｆ０が１．３以上の場合に、節の発生が特に抑制される。Ｆ１／Ｆ０は、１．４以上がさらに好ましい。Ｆ１／Ｆ０の上限は、２．０以下であることが好ましく、１．８以下であることがより好ましく、１．６以下であることがさらに好ましい。この場合に製造時の溶融紡糸の速度を上げやすく、生産性に優れる。 F1 / F0 is an index showing an increase in tensile stress due to stretching. The larger F1 / F0, the greater the degree of increase in tensile stress (degree of strain hardening) with stretching. When F1 / F0 is large, the portion where the degree of stretching is low is more likely to be stretched. Since the portion where the degree of stretching is low becomes the knot, the occurrence of the knot is suppressed by using the undrawn yarn having a large F1 / F0. Specifically, when F1 / F0 is 1.2 or more, the generation of nodes is suppressed, and when F1 / F0 is 1.3 or more, the generation of nodes is particularly suppressed. F1 / F0 is more preferably 1.4 or more. The upper limit of F1 / F0 is preferably 2.0 or less, more preferably 1.8 or less, and even more preferably 1.6 or less. In this case, it is easy to increase the speed of molten spinning during manufacturing, and the productivity is excellent.
＜ベース樹脂＞
　本実施形態の人工毛髪用繊維を構成する樹脂組成物は、ベース樹脂を含み、難燃剤等の添加剤を任意的に含む。ベース樹脂は、樹脂組成物中に５０質量％以上含まれることが好ましく、８０質量％以上がより好ましい。この場合、樹脂組成物の溶融成形が容易となる。 <Base resin>
The resin composition constituting the artificial hair fiber of the present embodiment contains a base resin and optionally contains an additive such as a flame retardant. The base resin is preferably contained in the resin composition in an amount of 50% by mass or more, more preferably 80% by mass or more. In this case, melt molding of the resin composition becomes easy.
　ベース樹脂を紡糸して得られる未延伸糸のＦ１／Ｆ０（以下、「ベース樹脂のＦ１／Ｆ０」）は１．３以上が好ましく、１．４以上がさらに好ましい。この場合に、樹脂組成物のＦ１／Ｆ０が大きくなりやすい。ベース樹脂のＦ１／Ｆ０は２．０以下が好ましい。 The F1 / F0 of the undrawn yarn obtained by spinning the base resin (hereinafter, "F1 / F0 of the base resin") is preferably 1.3 or more, and more preferably 1.4 or more. In this case, F1 / F0 of the resin composition tends to be large. The base resin F1 / F0 is preferably 2.0 or less.
　本実施形態の樹脂組成物のベース樹脂の組成は、特に限定されず、ポリアミド、ポリエステル、塩化ビニル等のうちの少なくとも１種で構成されることが好ましい。ベース樹脂は、ポリアミドを５０質量％以上含むことが好ましく、８０質量％以上含むことがさらに好ましい。この場合、耐熱性及び触感に優れた人工毛髪用繊維が得られやすい。 The composition of the base resin of the resin composition of the present embodiment is not particularly limited, and is preferably composed of at least one of polyamide, polyester, vinyl chloride and the like. The base resin preferably contains 50% by mass or more of polyamide, and more preferably 80% by mass or more. In this case, fibers for artificial hair having excellent heat resistance and tactile sensation can be easily obtained.
　ポリアミドは、脂肪族ポリアミドを含むことが好ましく、脂肪族ポリアミドと、脂肪族ジアミンと芳香族ジカルボン酸を縮合重合した骨格を持つ半芳香族ポリアミドとを含んでもよい。ポリアミドが脂肪族ポリアミドを５０質量％以上含むことが好ましく、ベース樹脂が脂肪族ポリアミドを５０質量％以上含むことがさらに好ましい。この場合、人工毛髪用繊維の触感が特に優れる。 The polyamide preferably contains an aliphatic polyamide, and may contain an aliphatic polyamide and a semi-aromatic polyamide having a skeleton obtained by condensation polymerization of an aliphatic diamine and an aromatic dicarboxylic acid. The polyamide preferably contains 50% by mass or more of the aliphatic polyamide, and the base resin more preferably contains 50% by mass or more of the aliphatic polyamide. In this case, the feel of the artificial hair fiber is particularly excellent.
　脂肪族ポリアミドは、芳香環を有さないポリアミドであり、脂肪族ポリアミドとして、ラクタムの開環重合によって形成されるｎ－ナイロンや、脂肪族ジアミンと脂肪族ジカルボン酸の共縮重合反応で合成されるｎ，ｍ－ナイロンが挙げられる。脂肪族ポリアミドとしては、例えば、ポリアミド６及びポリアミド６６が挙げられる。耐熱性の観点からはポリアミド６６が好ましい。 The aliphatic polyamide is a polyamide having no aromatic ring, and is synthesized as an aliphatic polyamide by n-nylon formed by ring-opening polymerization of lactam or by a copolymerization reaction of an aliphatic diamine and an aliphatic dicarboxylic acid. N, m-nylon can be mentioned. Examples of the aliphatic polyamide include polyamide 6 and polyamide 66. Polyamide 66 is preferable from the viewpoint of heat resistance.
　半芳香族ポリアミドとしては、例えば、ポリアミド６Ｔ、ポリアミド９Ｔ、ポリアミド１０Ｔ、及びそれらをベースに変性用モノマーを共重合させた変性ポリアミド６Ｔ、変性ポリアミド９Ｔ、変性ポリアミド１０Ｔが挙げられる。中でも、溶融成形のし易さの点からはポリアミド１０Ｔが好ましい。 Examples of the semi-aromatic polyamide include polyamide 6T, polyamide 9T, polyamide 10T, and modified polyamide 6T, modified polyamide 9T, and modified polyamide 10T obtained by copolymerizing a modifying monomer based on them. Of these, polyamide 10T is preferable from the viewpoint of ease of melt molding.
　ポリエステルは、例えばＰＥＴである。 Polyester is, for example, PET.
　ベース樹脂は、第１樹脂を含むことが好ましく、第１樹脂を紡糸して得られる未延伸糸のＦ１／Ｆ０（以下、「第１樹脂のＦ１／Ｆ０」）が１．３以上であることが好ましい。この場合に、樹脂組成物のＦ１／Ｆ０が大きくなりやすいからである。ベース樹脂中の第１樹脂の含有量は、例えば３０質量％以上であり、５０質量％以上が好ましく、６５質量％以上がさらに好ましく、８０質量％以上がさらに好ましい。この場合に、樹脂組成物のＦ１／Ｆ０がさらに大きくなりやすいからである。 The base resin preferably contains a first resin, and the undrawn yarn obtained by spinning the first resin has an F1 / F0 (hereinafter, “F1 / F0 of the first resin”) of 1.3 or more. Is preferable. In this case, F1 / F0 of the resin composition tends to be large. The content of the first resin in the base resin is, for example, 30% by mass or more, preferably 50% by mass or more, more preferably 65% by mass or more, still more preferably 80% by mass or more. In this case, F1 / F0 of the resin composition tends to be further increased.
　第１樹脂は、３００℃、せん断速度２４００（１／ｓ）時の溶融粘度が１００（Ｐａ・ｓ）以上であることが好ましい。この場合、第１樹脂のＦ１／Ｆ０の値が高くなりやすいからである。上記条件での第１樹脂の溶融粘度は、１１０（Ｐａ・ｓ）以上が好ましい。この場合、第１樹脂のＦ１／Ｆ０の値が高くなりやすいからである。 The first resin preferably has a melt viscosity of 100 (Pa · s) or more at 300 ° C. and a shear rate of 2400 (1 / s). In this case, the value of F1 / F0 of the first resin tends to be high. The melt viscosity of the first resin under the above conditions is preferably 110 (Pa · s) or more. In this case, the value of F1 / F0 of the first resin tends to be high.
　第１樹脂は、ポリアミドであることが好ましく、脂肪族ポリアミドであることがさらに好ましく、ポリアミド６又はポリアミド６６であることがさらに好ましく、ポリアミド６６であることがさらに好ましい。この場合に、第１樹脂のＦ１／Ｆ０の値が特に高くなりやすいからである。 The first resin is preferably a polyamide, more preferably an aliphatic polyamide, further preferably a polyamide 6 or a polyamide 66, and even more preferably a polyamide 66. In this case, the value of F1 / F0 of the first resin tends to be particularly high.
（難燃剤）
　本発明の人工毛髪用繊維は、難燃剤を含むことが好ましい。難燃剤は、臭素系難燃剤が好ましい。難燃剤の添加量は、ベース樹脂１００質量部に対して３～３０質量部が好ましく、より好ましくは５～２５質量部であり、より好ましくは１０～２５質量部である。このような場合に、人工毛髪用繊維の外観、スタイリング性、及び難燃性が特に良好になるからである。 (Flame retardants)
The artificial hair fiber of the present invention preferably contains a flame retardant. The flame retardant is preferably a bromine-based flame retardant. The amount of the flame retardant added is preferably 3 to 30 parts by mass, more preferably 5 to 25 parts by mass, and more preferably 10 to 25 parts by mass with respect to 100 parts by mass of the base resin. This is because in such a case, the appearance, styling property, and flame retardancy of the artificial hair fiber are particularly improved.
　臭素系難燃剤としては、例えば臭素化フェノール縮合物、臭素化ポリスチレン樹脂、臭素化ベンジルアクリレート系難燃剤、臭素化エポキシ樹脂、臭素化フェノキシ樹脂、臭素化ポリカーボネート樹脂および臭素含有トリアジン系化合物が挙げられる。 Examples of the brominated flame retardant include brominated phenol condensate, brominated polystyrene resin, brominated benzyl acrylate flame retardant, brominated epoxy resin, brominated phenoxy resin, brominated polycarbonate resin and bromine-containing triazine-based compound. ..
（その他の添加剤）
　本実施形態で用いられる樹脂組成物には、必要に応じて添加剤、例えば、難燃助剤、微粒子、耐熱剤、光安定剤、蛍光剤、酸化防止剤、静電防止剤、顔料、染料、可塑剤、潤滑剤等を含有させることができる。 (Other additives)
The resin composition used in the present embodiment includes additives such as flame retardant aids, fine particles, heat resistant agents, light stabilizers, fluorescent agents, antioxidants, antistatic agents, pigments and dyes, if necessary. , Plasticizer, lubricant and the like can be contained.
＜製造工程＞
　以下に、人工毛髪用繊維の製造工程の一例を説明する。
　本発明の一実施形態の人工毛髪用繊維の製造方法は、溶融紡糸工程と、延伸工程と、アニール工程を備える。
　以下、各工程について詳細に説明する。 <Manufacturing process>
An example of the manufacturing process of the artificial hair fiber will be described below.
The method for producing an artificial hair fiber according to an embodiment of the present invention includes a melt spinning step, a drawing step, and an annealing step.
Hereinafter, each step will be described in detail.
（溶融紡糸工程）
　溶融紡糸工程では、樹脂組成物を溶融紡糸することによって未延伸糸を製造する。具体的には、まず、上述した樹脂組成物を溶融混練する。溶融混練するための装置としては、種々の一般的な混練機を用いることができる。溶融混練としては、たとえば一軸押出機、二軸押出機、ロール、バンバリーミキサー、ニーダーなどがあげられる。これらのうちでは、二軸押出機が、混練度の調整、操作の簡便性の点から好ましい。人工毛髪用繊維は、ポリアミドの種類により適正な温度条件のもと、通常の溶融紡糸法で溶融紡糸することにより製造することができる。 (Melting spinning process)
In the melt spinning step, an undrawn yarn is produced by melt spinning the resin composition. Specifically, first, the above-mentioned resin composition is melt-kneaded. As an apparatus for melt-kneading, various general kneading machines can be used. Examples of the melt-kneading 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. Fibers for artificial hair can be produced by melt-spinning by a normal melt-spinning method under appropriate temperature conditions depending on the type of polyamide.
　本実施形態における人工毛髪用繊維の単繊度は、２０～１００デシテックスが好ましく、より好ましくは３５～８０デシテックスである。この単繊度にするためには、溶融紡糸工程直後の繊維（未延伸糸）の繊度を３００デシテックス以下にしておくことが好ましい。未延伸糸の繊度が小さければ、細繊度の人工毛髪用繊維を得る為に延伸倍率を小さくすることができ、延伸処理後の人工毛髪用繊維に光沢が発生しにくくなることで、半艶～七部艶状態を維持することが容易になる傾向があるためである。 The single fineness of the artificial hair fiber in the present embodiment is preferably 20 to 100 decitex, more preferably 35 to 80 decitex. In order to achieve this single fineness, it is preferable that the fineness of the fiber (undrawn yarn) immediately after the melt spinning step is 300 decitex or less. If the fineness of the undrawn yarn is small, the draw ratio can be reduced in order to obtain fibers for artificial hair with fine fineness, and the fibers for artificial hair after the drawing treatment are less likely to be glossy. This is because it tends to be easy to maintain the seven-part glossy state.
（延伸工程）
　延伸工程では、得られた未延伸糸を延伸倍率１．５～５．０倍で延伸して延伸糸を製造する。このような延伸によって、１００デシテックス以下の細繊度の延伸糸を得ることができ、かつ繊維の引張強度を向上させることができる。延伸倍率は、２．０～４．０倍が好ましい。延伸倍率は、適度に大きい方が繊維の強度発現が適度に起こる傾向にあり、適度に小さい方が延伸処理時に糸切れを発生し難くなる傾向にあるためである。 (Stretching process)
In the drawing step, the obtained undrawn yarn is drawn at a drawing ratio of 1.5 to 5.0 times to produce a drawn yarn. By such drawing, a drawn yarn having a fineness of 100 decitex or less can be obtained, and the tensile strength of the fiber can be improved. The draw ratio is preferably 2.0 to 4.0 times. This is because when the draw ratio is appropriately large, the strength of the fiber tends to be developed appropriately, and when the draw ratio is appropriately small, the yarn breakage tends to be less likely to occur during the drawing treatment.
　延伸処理の際の温度は、９０～１２０℃が好ましい。延伸処理温度があまりに低いと繊維の強度が低くなると共に糸切れを発生し易くなる傾向にあり、あまりに高いと得られる繊維の触感がプラスチック的な滑り触感になる傾向にあるためである。 The temperature during the stretching treatment is preferably 90 to 120 ° C. This is because if the drawing treatment temperature is too low, the strength of the fibers tends to be low and yarn breakage tends to occur, and if the drawing treatment temperature is too high, the tactile sensation of the obtained fibers tends to be a plastic-like slippery feel.
（アニール工程）
　アニール工程では、延伸糸に対して好ましくは１５０～２００℃の熱処理温度で熱処理を行う。この熱処理によって、延伸糸の熱収縮率を低下させることができる。熱処理は、延伸処理の後に連続して行っても、一旦巻き取った後に時間を開けて行うこともできる。熱処理温度は、好ましくは１６０℃以上、さらに好ましくは１７０℃以上、さらに好ましくは１８０℃以上である。 (Annealing process)
In the annealing step, the drawn yarn is preferably heat-treated at a heat treatment temperature of 150 to 200 ° C. By this heat treatment, the heat shrinkage rate of the drawn yarn can be reduced. The heat treatment may be carried out continuously after the stretching treatment, or may be carried out with a time after being wound once. The heat treatment temperature is preferably 160 ° C. or higher, more preferably 170 ° C. or higher, still more preferably 180 ° C. or higher.
＜実施例・比較例の人工毛髪用繊維の製造＞
　吸湿率が１０００ｐｐｍ未満になる様に乾燥したポリアミド、ＰＥＴ及び臭素系難燃剤を表１にある配合比になる様にブレンドを行った。表１中のポリアミド、ＰＥＴ及び臭素系難燃剤に関する配合量についての数値は、質量部を表す。ブレンドした材料は、φ４０ｍｍ二軸押出機を用い、バレル設定温度２８０℃で溶融混練し、その後ギアポンプにより一定吐出量になるように調整し、温度２９５度、穴径０．５ｍｍ／本のダイスから鉛直方向に溶融紡出させ、ノズル直下２ｍの位置に設置した引取機に未延伸糸を一定速度で巻き取った。得られた未延伸糸について、後述する評価方法及び基準に従って、初期引張応力Ｆ０と、２．５倍延伸時引張応力Ｆ１の比Ｆ１／Ｆ０を測定した。その結果を表１に示す。  <Manufacturing of artificial hair fibers of Examples and Comparative Examples>
The dried polyamide, PET and brominated flame retardant were blended so as to have a hygroscopicity of less than 1000 ppm so as to have the blending ratio shown in Table 1. The numerical values regarding the blending amounts of the polyamide, PET and brominated flame retardants in Table 1 represent parts by mass. The blended material is melt-kneaded at a barrel set temperature of 280 ° C. using a φ40 mm twin-screw extruder, and then adjusted to a constant discharge rate by a gear pump. From a die with a temperature of 295 ° C. and a hole diameter of 0.5 mm / piece. The undrawn yarn was melt-spun in the vertical direction and wound at a constant speed on a take-up machine installed at a position 2 m directly below the nozzle. For the obtained undrawn yarn, the ratio F1 / F0 of the initial tensile stress F0 and the tensile stress F1 at the time of 2.5 times stretching was measured according to the evaluation method and criteria described later. The results are shown in Table 1.
　得られた未延伸糸を１００℃で延伸し、その後、１８０℃でアニールを行い、所定維度の人工毛髪用繊維を得た。延伸倍率は２．３倍、アニール時の弛緩率は６～７％にて行った。アニール時の弛緩率とは、（アニール時の巻取りローラの回転速度）／（アニール時の送り出しローラの回転速度）で算出される値である。 The obtained undrawn yarn was drawn at 100 ° C. and then annealed at 180 ° C. to obtain fibers for artificial hair having a predetermined weirdness. The draw ratio was 2.3 times, and the relaxation rate at the time of annealing was 6 to 7%. The relaxation rate at the time of annealing is a value calculated by (rotational speed of the take-up roller at the time of annealing) / (rotational speed of the feeding roller at the time of annealing).
　得られた人工毛髪用繊維について、後述する評価方法及び基準に従って、延伸性の評価を行った。その結果を表１に示す。 The stretchability of the obtained artificial hair fiber was evaluated according to the evaluation method and criteria described later. The results are shown in Table 1.
　また、表１に示す三種のＰＡ６６について、溶融粘度を測定した。その結果を表２に示す。 In addition, the melt viscosities of the three types of PA66 shown in Table 1 were measured. The results are shown in Table 2.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　表１～表２にある素材は、以下のものを採用した。以下のリスト中の溶融粘度は、３００℃、せん断速度２４００（１／ｓ）で測定した値である。
　ＰＡ６６（Ａ）：自社調製品、Ｆ１／Ｆ０＝１．５５、溶融粘度１６３（Ｐａ・ｓ）
　ＰＡ６６（Ｂ）：自社調製品、Ｆ１／Ｆ０＝１．５４、溶融粘度１４５（Ｐａ・ｓ）
　ＰＡ６６（Ｃ）：自社調製品、Ｆ１／Ｆ０＝１．０７、溶融粘度７５（Ｐａ・ｓ）
　ＰＡ６：自社製、Ｆ１／Ｆ０＝１．４６、溶融粘度１３０（Ｐａ・ｓ）
　ＰＡ１０Ｔ：ダイセルエボニック株式会社製、ＶＥＳＴＡＭＩＤ　ＨＯ　Ｐｌｕｓ　Ｍ３０００、Ｆ１／Ｆ０＝１．１６、溶融粘度６８（Ｐａ・ｓ）
　ＰＥＴ：三井化学株式会社製、Ｊ１２５Ｓ、Ｆ１／Ｆ０＝１．１４、溶融粘度６７（Ｐａ・ｓ）
　臭素系難燃剤：阪本薬品工業株式会社製、臭素化エポキシ樹脂　ＳＲＴ－２００００ The following materials were used as the materials shown in Tables 1 and 2. The melt viscosities in the list below are values measured at 300 ° C. and a shear rate of 2400 (1 / s).
PA66 (A): In-house prepared product, F1 / F0 = 1.55, melt viscosity 163 (Pa · s)
PA66 (B): In-house prepared product, F1 / F0 = 1.54, melt viscosity 145 (Pa · s)
PA66 (C): In-house prepared product, F1 / F0 = 1.07, melt viscosity 75 (Pa · s)
PA6: Made in-house, F1 / F0 = 1.46, melt viscosity 130 (Pa · s)
PA10T: manufactured by Daicel Evonik Industries, Ltd., VESTAMID HO Plus M3000, F1 / F0 = 1.16, melt viscosity 68 (Pa · s)
PET: Mitsui Chemicals, Inc., J125S, F1 / F0 = 1.14, melt viscosity 67 (Pa · s)
Brominated flame retardant: Bromine epoxy resin SRT-20000 manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.
＜各種測定・評価＞
　以下に示す方法で、各種特性・物性の測定及び評価を行った。 <Various measurements / evaluations>
Various characteristics and physical properties were measured and evaluated by the methods shown below.
（引張応力）
　実施例・比較例の引張応力は、ストログラフＴ（株式会社東洋精機製作所製）を用い、温度：１００℃、チャック間距離：１００ｍｍ、引張速度：０．５ｍ／分、繊維直径１２５μｍの条件で測定した。初期引張応力Ｆ０は、測定開始直後（詳細には、未延伸糸が１％伸びたとき）の引張応力であり、２．５倍延伸時引張応力Ｆ１は、未延伸糸が２．５倍に延伸されたときの引張応力である。 (Tensile stress)
The tensile stress of Examples and Comparative Examples was obtained by using Strograph T (manufactured by Toyo Seiki Seisakusho Co., Ltd.) under the conditions of temperature: 100 ° C., distance between chucks: 100 mm, tensile speed: 0.5 m / min, and fiber diameter of 125 μm. It was measured. The initial tensile stress F0 is the tensile stress immediately after the start of measurement (specifically, when the undrawn yarn is stretched by 1%), and the tensile stress F1 at the time of 2.5 times stretching is 2.5 times that of the undrawn yarn. It is the tensile stress when stretched.
（溶融粘度）
　実施例・比較例の溶融粘度は、Ｃａｐｉｌｏｇｒａｐｈ １Ｄ（株式会社東洋精機製作所製）を用い、温度：３００℃で、表２のせん断速度でＪＩＳ　Ｋ　７１９９に準じて測定した。 (Melting viscosity)
The melt viscosities of Examples and Comparative Examples were measured using Capillograph 1D (manufactured by Toyo Seiki Seisakusho Co., Ltd.) at a temperature of 300 ° C. and the shear rate shown in Table 2 according to JIS K 7199.
（延伸性評価）
　延伸倍率２．５倍又は４倍で作製した人工毛髪用繊維について、目視評価で１本・１０ｍ当たりの節の数を数えた。 (Evaluation of stretchability)
For artificial hair fibers produced at a draw ratio of 2.5 times or 4 times, the number of nodes per 10 m was counted by visual evaluation.
＜考察＞
　Ｆ１／Ｆ０が１．２以上である全ての実施例では、延伸性が良好であり、全ての比較例では、延伸性が良好でなかった。また、Ｆ１／Ｆ０が１．３以上である実施例１～４では、延伸性が特に良好であった。 <Discussion>
The stretchability was good in all the examples in which F1 / F0 was 1.2 or more, and the stretchability was not good in all the comparative examples. Further, in Examples 1 to 4 in which F1 / F0 was 1.3 or more, the stretchability was particularly good.

Claims (4)

  1. 　樹脂組成物が延伸された繊維で構成されている人工毛髪用繊維であって、
    　未延伸糸の１００℃における初期引張応力をＦ０と、２．５倍延伸時引張応力をＦ１とすると、
    　前記樹脂組成物を紡糸して得られる未延伸糸のＦ１／Ｆ０が１．２以上である、人工毛髪用繊維。     An artificial hair fiber in which the resin composition is composed of stretched fibers.
    Assuming that the initial tensile stress of the undrawn yarn at 100 ° C. is F0 and the tensile stress during 2.5 times stretching is F1.
    An artificial hair fiber having an F1 / F0 of 1.2 or more in an undrawn yarn obtained by spinning the resin composition.
  2. 　請求項１に記載の人工毛髪用繊維であって、
    　前記樹脂組成物は、第１樹脂を含有するベース樹脂を含み、
    　前記第１樹脂を紡糸して得られる未延伸糸のＦ１／Ｆ０が１．３以上である、人工毛髪用繊維。     The artificial hair fiber according to claim 1.
    The resin composition contains a base resin containing a first resin, and contains
    An artificial hair fiber having an F1 / F0 of 1.3 or more in the undrawn yarn obtained by spinning the first resin.
  3. 　請求項２に記載の人工毛髪用繊維であって、
    　前記ベース樹脂中の前記第１樹脂の含有量が５０質量％以上である、人工毛髪用繊維。     The artificial hair fiber according to claim 2.
    A fiber for artificial hair, wherein the content of the first resin in the base resin is 50% by mass or more.
  4. 　請求項２又は請求項３に記載の人工毛髪用繊維であって、
    　前記第１樹脂は、ポリアミドである、人工毛髪用繊維。     The artificial hair fiber according to claim 2 or 3.
    The first resin is a fiber for artificial hair, which is a polyamide.
PCT/JP2020/021666 2019-07-19 2020-06-01 Artificial hair fibers WO2021014765A1 (en)

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KR20100045626A (en) * 2008-10-24 2010-05-04 (주)우노 앤 컴퍼니 Polyamide-based filaments for artificial hair and process of preparing the same
JP2015066234A (en) * 2013-09-30 2015-04-13 株式会社カネカ Polyester fiber for artificial hair, and fiber bundle for hair and hair ornament product containing the same
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JP2003221733A (en) * 2002-01-28 2003-08-08 Kanegafuchi Chem Ind Co Ltd Flame retardant polyester fiber for artificial hair
KR20100045626A (en) * 2008-10-24 2010-05-04 (주)우노 앤 컴퍼니 Polyamide-based filaments for artificial hair and process of preparing the same
JP2015066234A (en) * 2013-09-30 2015-04-13 株式会社カネカ Polyester fiber for artificial hair, and fiber bundle for hair and hair ornament product containing the same
KR20150078893A (en) * 2013-12-31 2015-07-08 코오롱플라스틱 주식회사 Poly(ethylene naphthalate) Resin Composition
WO2017179340A1 (en) * 2016-04-13 2017-10-19 デンカ株式会社 Resin composition for artificial hair and molded body of same

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