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.

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• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Mechanical Engineering (AREA)
• Artificial Filaments (AREA)

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• 2020
  • 2020-06-01 WO PCT/JP2020/021666 patent/WO2021014765A1/ja active Application Filing
  • 2020-06-01 JP JP2021534575A patent/JP7492961B2/ja active Active
  • 2020-06-01 CN CN202080029467.2A patent/CN113710837B/zh active Active
  • 2020-06-01 US US17/607,281 patent/US20220186404A1/en active Pending

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