WO2006093100A1

WO2006093100A1 - Resin composition for flame-retardant polyester-based artificial hair and process for producing the same

Info

Publication number: WO2006093100A1
Application number: PCT/JP2006/303639
Authority: WO
Inventors: Toshiyuki Masuda
Original assignee: Kaneka Corporation
Priority date: 2005-03-01
Filing date: 2006-02-27
Publication date: 2006-09-08

Abstract

A resin composition for forming a polyester-based artificial hair which retains fiber properties possessed by ordinary polyester fibers, such as heat resistance and strength/elongation, is excellent in suitability for setting and spinnability, and has high flame retardancy. The resin composition for a flame-retardant polyester-based artificial hair comprises a polyester and, incorporated therein in specific proportions, a bromine compound flame retardant and an antimony compound and has a limiting oxygen index (LOI) of 26 or higher and an intrinsic viscosity (IV) of 0.5-1.0. Melt-spinning the resin composition gives a flame-retardant polyester-based artificial hair which retains fiber properties possessed by ordinary polyester fibers, such as heat resistance and strength/elongation, and is excellent in suitability for setting and spinnability.

Description

Specification

Flame retardant polyester-based artificial hair resin composition and method for producing the same

[0001] The present invention is a composition comprising a polyester, a bromine-containing flame retardant and an antimony compound, having a limiting oxygen index (LOI) of 26 or more and an intrinsic viscosity (IV) of 0.5 to 1.0. The present invention relates to a greave composition for flame retardant polyester-based artificial hair.

Background art

[0002] Polyethylene terephthalate or a fiber made of polyester terephthalate mainly composed of polyethylene terephthalate has a high melting point, a high elastic modulus, and excellent heat resistance and chemical resistance. Therefore, curtains, rugs, clothing, Widely used in blankets, sheets, tablecloths, chair upholstery, wall coverings, human hair, automotive interior materials, outdoor reinforcements, safety nets, etc.

[0003] On the other hand, human hair, artificial hair (modacrylic fiber, polyvinyl chloride fiber) and the like have been used in hair products such as wigs, hair wigs, false hairs, hair bands, doll hairs. However, the provision of human hair has become difficult, and the importance of artificial hair has increased. Modacrylic has been widely used as an artificial hair material due to its flame-retardant characteristics, but it was insufficient in terms of heat-resistant temperature. In recent years, artificial hair fibers using fibers mainly composed of polyester typified by polyethylene terephthalate having excellent heat resistance have been proposed. However, when it is used as an artificial hair material, it has become necessary to impart flame retardance as well as safety. Since conventional polyester fibers are flammable, various attempts have been made to improve the flame retardancy of polyester fibers. For example, from polyesters obtained by copolymerizing flame retardant monomers containing phosphorus atoms. There are known methods for making these fibers and methods for incorporating a flame retardant into polyester fibers.

[0004] As a method of copolymerizing the former flame-retardant monomer, for example, a method of copolymerizing a phosphorus compound having a phosphorus atom as a ring member and good thermal stability (Patent Document 1), In addition, a method of copolymerizing forceful loxyphosphinic acid (Patent Document 2), a method of blending or copolymerizing a phosphorus compound with a polyester containing polyarylate (Patent Document 3), etc. have been proposed. Yes. For example, a polyester fiber copolymerized with a phosphorus compound has been proposed as an application of the flame retardant technique to artificial hair (Patent Document 4). However, since artificial hair is required to have high flame resistance, in order to use these copolymerized polyester fibers for artificial hair, the amount of copolymerization must be increased. If the heat resistance of the polyester is greatly reduced and melt spinning becomes difficult or the flame approaches, ignition-combustion will not occur, but melting and drip will cause another problem.

[0005] On the other hand, as a method for containing the latter flame retardant, a method in which a polyester fiber contains a fine-grained halogenated cycloalkane compound (Patent Document 5), or a method in which a bromine atom-containing alkylcyclohexane is contained ( Patent literature 6) has been proposed! In the method of adding a flame retardant to the polyester fiber, it is necessary to increase the treatment temperature to 150 ° C or higher in order to obtain sufficient flame resistance, or to increase the treatment time. There is a problem that it is necessary or a large amount of a flame retardant has to be used, which causes problems such as a decrease in fiber properties, a decrease in productivity, and an increase in manufacturing cost.

[0006] Although it has been proposed to improve the flame retardancy by blending an antimony compound as a flame retardant aid (Patent Documents 7 and 8), a molded product is described for these applications. Has been

There is no description about 1S fiber.

[0007] As described above, for artificial hair capable of forming artificial hair excellent in setability, spinning processability and flame retardancy while maintaining the fiber physical properties such as heat resistance, strength and elongation of conventional polyester fibers. The rosin composition has not yet been obtained and is in reality.

Patent Document 1: Japanese Patent Publication No. 55-41610

Patent Document 2: Japanese Patent Publication No. 53-13479

Patent Document 3: Japanese Patent Laid-Open No. 11-124732

Patent Document 4: JP-A-3-27105

Patent Document 5: Japanese Patent Publication No. 3-57990

Patent Document 6: Japanese Patent Publication No. 1-24913

Patent Document 7: Japanese Patent No. 2693331

Patent Document 8: Japanese Patent Laid-Open No. 2002-128998 Disclosure of the invention

Problems to be solved by the invention

[0008] The present invention solves the conventional problems as described above, maintains the fiber properties such as heat resistance, strength and elongation of ordinary polyester fiber, is excellent in setability and spinning processability, and has high flame retardancy. An object of the present invention is to provide a rosin composition for forming polyester-based artificial hair having a hair.

Means for solving the problem

[0009] As a result of intensive investigations to solve the above problems, the present inventors have found a resin composition containing a specific ratio of bromine-containing flame retardant and antimony compound to polyester. A flame retardant polyester-based artificial polyester having a critical oxygen index (LOI) of 26 or more and an intrinsic viscosity (IV) of the resin composition of 0.5 to 1.0. By melt spinning the rosin composition for hair, the fiber properties such as heat resistance and high elongation of ordinary polyester fiber are maintained, and flame-retardant polyester artificial hair with excellent setability and spinning processability is obtained. As a result, the present invention was completed.

That is, the present invention relates to the following flame retardant polyester artificial hair greave composition and a method for producing the flame retardant polyester artificial hair greave composition.

(1) Polyalkylene terephthalate and at least one polyester selected from the group consisting of polyalkylene terephthalate-based copolyesters (A) Bromine-containing flame retardant (B) 5 to 100 parts by weight A fat composition comprising 30 parts by weight and antimony compound (C) O. 5 to 10 parts by weight, wherein the critical oxygen index (LOI) of the fat composition is 26 or more, and 1. A flame retardant polyester-based artificial hair composition characterized by having an intrinsic viscosity (IV) of the resin composition of 0.5 to 1.0.

(2) Polyalkylene terephthalate strength The at least one selected from the group strength consisting of polyethylene terephthalate, polypropylene terephthalate and polybutylene terephthalate.

(3) Bromine-containing flame retardant (B) is brominated aromatic flame retardant, bromine-containing phosphate ester flame retardant, brominated polystyrene flame retardant, brominated benzaryl acrylate flame retardant, brominated epoxy Flame retardant, brominated phenoxy flame retardant, brominated polycarbonate flame retardant, The flame-retardant polyester-based artificial material according to (1) or (2), which is at least one flame retardant selected from the group force consisting of a tetrabromobisphenol A derivative, a bromine-containing triazine compound, and a bromine-containing isocyanuric acid compound A rosin composition for hair.

(4) The antimony compound (C) is at least one antimony compound selected from the group consisting of antimony triacid, antimony tetraacid, antimony tetraacid, antimony pentoxide and sodium antimonate. A resin composition for flame retardant polyester-based artificial hair according to any one of (1) to (3).

(5) The composition of (A) to (C), which further comprises organic fine particles (D) and Z or inorganic fine particles (E), and (1) to (4). A flame retardant polyester-based greave composition for artificial hair according to claim 1.

(6) The flame retardant according to (5), wherein the organic fine particles (D) are at least one selected from the group force consisting of polyarylate, polyamide, fluorine resin, silicone resin, crosslinked acrylic resin, and crosslinked polystyrene. A polyester-based artificial oil hair composition.

(7) inorganic fine particles (E) is also selected at least a group force consisting of calcium carbonate, silicon oxide, titanium oxide, aluminum oxide, dumbbell, tanolec, kaolin, montmorillonite, bentonite, my power and melamine sili force composite particles One type of flame retardant polyester-based artificial hair composition according to (5).

(8) The components (A) to (E) are melt-kneaded under a condition of QZR of 0.5 to 2.5 using a twin screw extruder, (1) to (7) The method for producing a rosin composition for artificial hair according to any one of the above.

(9) Using a twin-screw extruder, put the mixture of components (A) and (B) into the first feeder, and then add components (C) to (E) from the second feeder to melt them. The method for producing a greave composition for flame-retardant polyester-based artificial hair according to (8), which is kneaded.

(10) Using a twin screw extruder, the component (A) is charged from the first feeder, and then (B) to (

E) The method for producing a flame retardant polyester artificial hair greave composition according to (8), wherein the mixture of the components is also melted and kneaded with the second feeder.

(11) Using a twin screw extruder having two inlets, the mixture of components (A) and (B) is charged to the first charging locus, and then components (C) to (E) are Input loca The method for producing a flame-retardant polyester-based artificial hair coagulant composition according to (8), which is melt-kneaded.

(12) Using a twin screw extruder having two inlets, the component (A) is also charged into the first inlet, and then the mixture of components (B) to (E) is charged into the second The method for producing a flame retardant polyester-based artificial hair coagulant composition according to (8), which is introduced from the mouth and melt kneaded.

(13) When the distance between the first inlet and the tip of the screw is 100, the position of the second inlet is at the position of the first inlet side force 40-80 (11) or (12 ) For producing a resin composition for artificial hair.

(14) The method for producing a flame-retardant polyester artificial hair greave composition according to any one of (8) to (13), wherein the LZD of the twin-screw extruder is 25 to 50. The invention's effect

[0011] According to the present invention, fiber properties such as heat resistance and high elongation of normal polyester fiber are maintained.

Thus, it is possible to obtain a rosin composition that is excellent in setability and spinning processability and can form polyester-based artificial hair having high flame retardancy.

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] The flame retardant polyester-based artificial hair composition of the present invention comprises a polyalkylene terephthalate and a polyester (A) which also has at least one kind of copolymer polyester mainly composed of polyalkylene terephthalate, bromine-containing difficult A resin composition comprising a flame retardant (B) and an antimony compound (C) and having a specific limiting oxygen concentration (LOI) and intrinsic viscosity (IV).

[0013] The polyalkylene terephthalate and the copolyester mainly composed of polyalkylene terephthalate contained in the polyester (A) used in the present invention include, for example, polyalkylenes such as polyethylene terephthalate, polypropylene terephthalate, and polybutylene terephthalate. Examples thereof include copolyesters mainly composed of terephthalate and Z or their polyalkylene terephthalates and containing a small amount of a copolymer component.

[0014] The main component means containing 80 mol% or more.

[0015] Examples of the copolymer component include isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, para-phenolic dicarboxylic acid, trimellitic acid, pyromellitic acid, succinic acid, glutaric acid, adipic acid, speric acid, and azelain. Multivalent power such as acid, sebacic acid, dodecanedioic acid Rubonic acid, derivatives thereof, dicarboxylic acids including sulfonates such as 5-sodiumsulfoisophthalic acid, dihydroxyethyl 5-sodiumsulfoisophthalate, its derivatives, 1,2 propanediol, 1,3 propanediol, 1 , 4 Butanediol, 1,6--hexanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, diethylene glycolol, polyethylene glycol, trimethylolpropane, pentaerythritol, 4-hydroxybenzoic acid, ε One protarataton is one of them.

[0016] The copolyester is usually made to react by containing a small amount of a copolymer component in a polymer of terephthalic acid, which is the main component, and a derivative thereof (for example, methyl terephthalate) and alkylene glycol. From the viewpoint of stability and ease of operation, it is preferable to produce by the above method. However, polymerizing a mixture of the main component terephthalic acid and cocoon or a derivative thereof (for example, methyl terephthalate) and an alkylene glycol with a monomer or oligomer component that is a small amount of copolysynthesis. It may be manufactured by.

[0017] The copolymer polyester is not particularly limited in the way of copolymerization and the like as long as the copolymer component is polycondensed to the main chain and side or side chain of the main polyalkylene terephthalate. .

[0018] Specific examples of the copolyester mainly composed of polyalkylene terephthalate include, for example, polyester mainly composed of polyethylene terephthalate and copolymerized with ethylene glycol ether of bisphenol, 1,4-cyclohexanedimethanol. Examples include polyesters copolymerized and polyesters copolymerized with 5-hydroxysulfoisophthalate dihydroxyethyl.

[0019] The polyalkylene terephthalate and the copolyester may be used singly or in combination of two or more. Among these, polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, copolymer polyester (polyester mainly composed of polyethylene terephthalate and copolymerized with ethylene glycol ether of bisphenol A, 1,4-cyclohexanedimethanol) A copolymerized polyester, a polyester copolymerized with 5-hydroxysulfoisophthalate dihydroxyethyl, etc.) are preferred. A mixture of two or more of these is also preferred. [0020] The intrinsic viscosity (IV) of the polyester (A) used in the present invention is preferably 0.5 to 1.4, more preferably 0.6 to 1.2. When the intrinsic viscosity of the polyester (A) is less than 0.5, the mechanical strength of the resulting fiber tends to decrease, and when it exceeds 1.4, the melt viscosity increases as the molecular weight increases, and melt spinning becomes difficult. It tends to be difficult and the fineness becomes uneven.

[0021] The bromine-containing flame retardant (B) used in the present invention is not particularly limited, and any bromine-containing flame retardant generally used can be used.

[0022] Specific examples of the bromine-containing flame retardant (B) include, for example, pentabromotoluene, hexose benzene, decabromodiphenyl, decabromodiphenyl ether, bis (tribromophenoxy) ethane, tetrabromophthalic anhydride, ethylenebis ( Bromine-containing phosphate esters such as tetrabromophthalimide), ethylene bis (pentabromophenol), otataboromotrimethylphenolindane, tris (tribromoneopentyl) phosphate, represented by the following general formula (1) Brominated polystyrenes, brominated polybenzyl acrylates represented by the following general formula (2), brominated epoxy oligomers represented by the following general formula (3), brominated phenoxy resin, Brominated polycarbonate oligomers represented by 4), tetrabromobisphenol A, teto Tetrabromobisphenol A derivatives such as bromobisphenol A-bis (2,3-dibromopropyl ether), tetrabromobisphenol A-bis (aryl ether), tetrabromobisphenol A-bis (hydroxyethyl ether), tris ( Examples thereof include bromine-containing triazine compounds such as tripromophenoxy) triazine and bromine-containing isocyanuric compounds such as tris (2,3-dibromopropyl) isocyanurate. These may be used alone or in combination of two or more.

[0023] [Chemical 1]

(In the formula, Y represents 1 to 5, n represents 5 to 200) [0024] [Chemical 2]

(In the formula, m is 5 to: LOO)

[0025] [Chemical 3]

(In the formula, R ¹ is a hydrocarbon group having 1 to 10 carbon atoms, an aryl group, an aralkyl group, a hydrocarbon group containing a reactive group, a bromine-containing aryl group, or a bromine-containing aralkyl group, which are the same. Or may be different, P represents 1 to 80)

[0026] [Chemical 4]

. 〇>" ^R (4)

(Wherein R ² is a hydrogen atom or a bromine atom, and they may be the same or different from each other, q represents 1 to 80)

Among these, from the viewpoint of imparting flame retardancy, bromine-containing phosphate ester flame retardant, brominated polystyrene flame retardant, brominated benzyl acrylate retardant, brominated epoxy oligomer flame retardant, bromine Preference is given to fluorinated phenoxy flame retardants, brominated polycarbonate flame retardants, tetrabromobisphenol A derivatives, bromine-containing triazine compounds and bromine-containing isocyanuric acid compounds!

[0027] The amount of the bromine-containing flame retardant (B) used in the present invention is 100 parts by weight of polyester. On the other hand, 5 to 30 parts by weight is preferred, 6 to 25 parts by weight is more preferred, and 7 to 20 parts by weight is more preferred. If the amount of bromine-containing flame retardant (B) used is less than 5 parts by weight, the flame retardant effect tends to be difficult to obtain, and if it is more than 30 parts by weight, mechanical properties, heat resistance and drip resistance are impaired. Tend.

[0028] In the present invention, the flame retardancy is exhibited by blending the bromine-containing flame retardant (B). The flame retardancy effect is remarkably achieved by blending the antimony compound (C). improves.

[0029] Specific examples of the antimony compound (C) used in the present invention are not particularly limited.

Examples thereof include antimony trioxide, antimony tetraoxide, antimony pentoxide, and sodium antimonate.

[0030] The average particle size of the antimony compound (C) in the present invention is preferably from 0.02 to 15 μm, more preferably from 0.1 to 12 m, and even more preferably from 0.2 to 10 m.

[0031] The antimony compound (C) may be surface-treated with an epoxy compound, a silane compound, a isocyanate compound, a titanate compound, or the like, if necessary.

[0032] The amount of the antimony compound (C) used in the present invention is preferably 0.5 to 10 parts by weight, more preferably 0.6 to 9 parts by weight based on 100 parts by weight of the polyester (A). 7-7 parts by weight Force S More preferred. When the amount of the antimony compound (C) used is less than 0.5 parts by weight, the improvement of the flame retardancy tends to be small, and when it is more than 10 parts by weight, the spinning processability, appearance and transparency are impaired. There is a tendency to be.

[0033] The limiting oxygen index (L OI) of the flame retardant polyester-based artificial hair greave composition in the present invention is preferably 26 or more, more preferably 27 or more. If the LOI of the flame retardant polyester-based artificial hair coagulant composition is less than 26, the resulting fibers tend to ignite and tend to burn.In actual use, artificial hair is used when cooking or smoking. Since it may be in contact with flames, it is difficult to ensure safety when used as artificial hair. If the LOI is less than 26, it is difficult to self-extinguish once it is ignited.

[0034] In the present invention, the limiting oxygen index (LOI) of the flame retardant polyester-based artificial hair coagulant composition specifies the amounts of bromine-containing flame retardant (B) and antimony compound (C) used. It can be adjusted by selecting the range. [0035] The intrinsic viscosity (IV) of the flame retardant polyester artificial hair greave composition in the present invention is preferably 0.5 to 1.0 force, more preferably 0.6 to 0.9. preferable. If the intrinsic viscosity of the flame retardant polyester-based human waving resin composition is less than 0.5, the mechanical strength of the resulting fiber tends to decrease or thread breakage tends to occur. If it exceeds 0, the melt viscosity becomes high, and spinning tends to be difficult, and the fineness tends to be non-uniform.

[0036] In the present invention, the intrinsic viscosity (IV) of the flame retardant polyester-based artificial hair coagulant composition is selected from the intrinsic viscosity of the polyester (A) and each raw material is sufficiently dried. , By controlling moisture absorption during blending and melt kneading, adjusting kneading temperature, discharge amount and screw rotation speed during melt kneading, adjusting the input position of antimony compound (C), etc. can do.

[0037] The fiber obtained from the flame retardant polyester-based artificial hair composition of the present invention is obtained by mixing organic fine particles (D) and Z or inorganic fine particles (E). Fine protrusions can be formed on the surface to adjust the gloss and gloss of the fiber surface.

[0038] The organic fine particles (D) in the present invention may be used as long as they are organic resins having a structure that is incompatible with or partially incompatible with the flame retardant polyester (A) as the main component. For example, polyarylate, polyamide, fluorine resin, silicon resin, crosslinked acrylic resin, crosslinked polystyrene, etc. are preferably used. These may be used alone or in combination of two or more. In order to stably exhibit a gloss adjusting effect, crosslinked polyester particles and crosslinked acrylic particles are preferred from the viewpoint of heat resistance and dispersibility.

[0039] The crosslinked polyester particles can be obtained by water-dispersing unsaturated polyester and a bull monomer and crosslinking and curing. Examples of the unsaturated polyester used herein include, but are not limited to, for example, ex, j8-unsaturated acid or a mixture of a saturated acid and a dihydric alcohol or a trihydric alcohol. it can

. Examples of the unsaturated acid include fumaric acid, maleic acid, and itaconic acid. Examples of the saturated acid include phthalic acid, terephthalic acid, succinic acid, daltaric acid, tetrahydrophthalic acid, adipic acid, and sebatin. An acid etc. are mentioned. Examples of the dihydric alcohol and trihydric alcohol include ethylene glycol, diethylene glycol, propylene glycol, neopentyl glycol, 1,3-propanediol, and 1,6-hexanediol. Examples include all and trimethylolpropane. On the other hand, examples of the bur monomer include, but are not limited to, styrene, chlorostyrene, vinyl toluene, divinyl benzene, acrylic acid, methyl acrylate, acrylonitrile, ethyl acrylate, and diaryl phthalate.

[0040] The crosslinked acrylic particles can be obtained by water-dispersing an acrylic monomer and a crosslinking agent, followed by crosslinking and curing. Examples of acrylic monomers used herein include acrylic acid or acrylic acid derivatives such as methyl acrylate, butyl acrylate, hexyl acrylate, cyclohexyl acrylate, hydroxyethyl acrylate, Acrylonitrile, allylamide, N-methylolacrylamide, or methacrylic acid or methacrylic acid derivatives such as methyl methacrylate, butyl methacrylate, hexyl methacrylate, glycidyl methacrylate, benzyl methacrylate, cyclohexyl methacrylate, Methacrylic acid N-bilulu 2-pyrrolidone, metatary-tolyl, methacrylamide, N-methylol methacrylamide, 2-hydroxyethyl methacrylate, etc. Monomer. These can be used alone or in combination of two or more. The crosslinking agent may be any monomer having two or more bull groups in one molecule, but one having two bull groups in one molecule is preferable. Preferred examples of the monomer include dibutenebenzene, a reaction product of glycol and methacrylic acid or acrylic acid (for example, ethylene glycol dimetatalylate, neopentyl glycol dimetatalylate, etc.). Forces to be used are not limited to these. The addition amount of the crosslinking agent is preferably 0.02 to 5 parts by weight with respect to 100 parts by weight of the monomer having one bur group. As the polymerization initiator, peroxy radical radical polymerization initiators are preferred. For example, benzoyl peroxide, 2-ethylhexyl perbenzoate, di-tert-butyl peroxide, and tamenhydroperoxide. And methyl ethyl ketone peroxide. The radical polymerization initiator is preferably used in an amount of 0.05 to L0 parts by weight with respect to 100 parts by weight of the monomer having one vinyl group.

[0041] The inorganic fine particles (E) used in the present invention are preferably those having a refractive index close to the refractive index of the polyester (A) from the viewpoint of the effects on the transparency and color developability of the fiber. Calcium, silicon oxide, titanium oxide, aluminum oxide, zinc oxide, talc, force Examples include olin, montmorillonite, bentonite, and my power. These may be used alone or in combination of two or more. Among these, particles close to a spherical shape are preferably composite particles mainly composed of silicon oxide and acid hydride, which have a higher gloss adjustment effect. The inorganic fine particles (E) used in the present invention may be surface-treated with an epoxy compound, a silane compound, an isocyanate compound, a titanate compound, etc., if necessary, for the polyester-based artificial hair of the present invention. The resin composition can contain various additives such as heat-resistant agents, light stabilizers, fluorescent agents, antioxidants, antistatic agents, pigments, plasticizers, and lubricants as necessary. .

[0042] The flame retardant polyester-based artificial hair composition according to the present invention includes, for example, components (A) to (C), and further dry-blended components (D) to (E). It can be obtained by melt-kneading using a typical kneader, for example, a single screw extruder, a twin screw extruder, a roll, a Banbury mixer, an ader or the like. As the kneading machine, a twin-screw extruder is preferable because of adjustment of the kneading degree and ease of operation.

[0043] For the melt-kneading of the flame retardant polyester-based artificial hair composition of the present invention, the spinning processability is high in order to ensure the drip resistance, and the kneading can be performed while ensuring the melt viscosity. It is necessary to select the temperature conditions, screw configuration, screw rotation speed, discharge amount, etc. as appropriate.

[0044] Of these, the degree of kneading (QZR) indicating the relationship between the discharge rate Q (unit: gZ) and the screw rotation speed R (unit: rpm) is important as an indicator of the degree of melt-kneading. . When the degree of kneading (Q / R) is small, it indicates that the kneading is sufficiently performed, and when it is large, it indicates that the kneading is insufficient.

[0045] For the melt-kneading of the flame retardant polyester-based artificial hair composition of the present invention,

WSQ R, 0.5-2. 5 power S female-like, 0.6-2. 2 power-like female, 0.7-7-2.0 power ^ More preferable. When the degree of kneading QZR is less than 0.5, the intrinsic viscosity of the obtained resin composition is remarkably lowered, so that the spinning processability is lowered and yarn breakage tends to occur. On the other hand, if the QZR exceeds 2.5, the dispersion of each component becomes insufficient and the agglomeration results in inhomogeneous mixing, resulting in a decrease in flame retardancy, mechanical properties, appearance, and a decrease in spinning processability. There is a tendency to happen.

[0046] In the present invention, when the mixture of components (A) to (E) is a mixture of a resin pellet and an inorganic compound powder, the composition ratio in the mixture is not uniform. Therefore, it is possible to stabilize flame retardancy and suppress deterioration of mechanical properties by using a method that uses two or more feeders from one inlet and a method that feeds separately from two inlets. It is preferable to ensure uniformity of kneading and spinning processability.

[0047] In the present invention, when two or more feeders are used from one inlet, the mixture of components (A) and (B) is transferred from the first feeder, and components (C) to (E) are added. From the second feeder, etc., a method of simultaneously charging into a twin screw extruder at a predetermined ratio and melt-kneading, or (A) component from the first feeder and (B) to (E) mixture of components The same feeder and melt kneading method can suppress the classification of the powder component and the small amount of blended components and can knead evenly, so that yarn breakage during spinning can be suppressed, resulting in uneven quality of artificial hair products. From the point that can be suppressed.

[0048] In the present invention, when a split feed method is used using a twin-screw extruder having two inlets, the mixture of the components (A) and (B) is also input to the first input loca. Next, a method in which the components (C) to (E) are charged from the second charging port and melt-kneaded, or (A) the component is also charged to the first charging port, and then (B) to The method in which the mixture of the component (E) is introduced from the second inlet and melt-kneaded can suppress decomposition of the components (A) and (B) during melt-kneading, and can be used for spinning processability, artificial hair products. It is preferable from the viewpoint of ensuring quality. That is, by introducing the antimony compound (C) from the second inlet, the decrease in the intrinsic viscosity (IV) of the obtained resin composition can be reduced, and the mechanical properties and spinning processability of the resulting fiber can be reduced. The dripping resistance can be improved.

[0049] At this time, as the position of the second input port, when the distance between the first input port and the tip of the screw is 100, the first input port side force may exist at a position of 40-80. Also preferred is the point power that can suppress decomposition of components (A) and (B) during melt-kneading and can be uniformly kneaded.

[0050] In the method for producing a flame retardant polyester artificial hair greave composition of the present invention, the kneading temperature (wax temperature) during melt kneading is preferably 240 to 310 ° C. 300 ° C is more preferred. When the kneading temperature at the time of melt kneading is less than 240 ° C, the resin composition is sufficiently melted. Therefore, the kneading tends to be inadequate or the load on the extruder increases, and the kneading cannot be performed. On the other hand, when the kneading temperature at the time of melt kneading exceeds 310 ° C, the decomposition of the resin composition is promoted, the melt viscosity of the resin composition is reduced, and the obtained resin composition strength is also reduced. There is a tendency for the physical properties of the formed fibers to decrease.

[0051] In the method for producing a flame retardant polyester artificial hair greave composition of the present invention, it is more preferable to use a twin screw extruder of L / D = 15-50. The L / D value is a value for which the specific force of the screw length (L) and screw diameter (D) of the twin-screw extruder is also obtained, and is a value unique to the extruder. When the L value is large, the residence time of the resin composition in the extruder becomes longer, and as a result, the kneading time of the resin composition becomes longer. When the D value is large, the processing capacity increases. That is, the LZD value is an index of the kneading ability of the extruder, and the larger the LZD value, the greater the shear stress is applied, and the more kneaded resin composition can be obtained.

[0052] When the LZD of the twin screw extruder is less than 15, the screw length is short, so that the melting becomes insufficient and the kneading effect tends not to be obtained. If the LZD exceeds 50, it tends to be overdispersed or the decomposition of the greaves.

[0053] The flame retardant polyester artificial hair coagulant composition of the present invention can be produced by flame spinning using a conventional melt spinning method to produce flame retardant polyester artificial hair.

That is, for example, melt spinning is performed at a temperature of 270 to 310 ° C. such as an extruder, a gear pump, and a die, and the spun yarn is passed through a heating tube and then cooled to a glass transition point or lower. The spun yarn is obtained by taking it up at a speed of 50 to 5000 mZ. It is also possible to control the fineness by cooling the spun yarn in a water tank containing water for cooling. The temperature and length of the heating cylinder, the temperature and amount of cooling air, the temperature of the cooling water tank, the cooling time, and the take-up speed can be appropriately adjusted according to the discharge amount and the number of holes in the base.

[0055] The obtained undrawn yarn is heat-drawn, and drawing is performed by a two-step method in which the undrawn yarn is wound once and then drawn, and a direct spinning drawing method in which drawing is continuously performed without winding. Either method may be used. The hot stretching is performed by a single-stage stretching method or a multi-stage stretching method having two or more stages. As a heating means in the heat stretching, a heating roller, a heat plate, a steam jet device, a hot water tank, or the like can be used, and these can be used in combination as appropriate.

[0056] The single fiber fiber of the flame-retardant polyester artificial hair formed from the resin composition of the present invention Usually, 10 to: LOOdtex force S, preferably 20 to 90 dtex force, more preferably 30 to 70 dtex force S. The artificial hair has heat resistance capable of using a beauty heat instrument (hair eye opening) at 160 to 200 ° C., and preferably has self-extinguishing properties that are difficult to ignite.

[0057] In addition, the flame-retardant polyester artificial hair formed from the resin composition of the present invention is excellent in curl setting using a beauty heat appliance (hair iron), and also has good curl retention. Excel. In addition, the surface of the fiber is moderately erased due to the unevenness of the fiber surface, and can be used as artificial hair. In addition, oil agents such as fiber surface treatment agents and softeners can be used to provide a feeling of touch and texture, making it closer to human hair.

[0058] The flame-retardant polyester artificial hair formed from the resin composition of the present invention may be used in combination with other artificial hair materials such as modacrylic fiber, polyvinyl chloride fiber, and nylon fiber. It may be used in combination with human hair.

Example

Next, the present invention will be more specifically described based on examples, but the present invention is not limited to these.

[0060] The method for measuring the characteristic value is as follows.

[0061] (Intrinsic viscosity of rosin composition)

Using an equal weight mixture of phenol and tetrachloroethane as a solvent, the relative viscosity at 25 ° C was measured using a Ubbelohde type viscosity tube with respect to a solution having a concentration of 0.5 gZdl of the obtained resin composition. Intrinsic viscosity is calculated from the following formula.

[0062] [Equation 1]

[η] = 1 i πι τ, _sp / C = 1 im (rj _re ,-1) / C

C → 0 C → 0

= 1 im (— η ₀ ) / ₀ C (where r? Is the viscosity of the solution and r?

0 is the viscosity of the solvent, 7?

rel is the relative viscosity, 7?

sp is the specific viscosity, [τ?] is the intrinsic viscosity, and C is the concentration of the solution. ) ₀

[0063] (Limited oxygen index LOI)

For the obtained rosin composition, in accordance with JIS K 7201, a limiting acid that is an indicator of combustibility The prime index LOI was calculated.

[0064] (Spinnability)

Under the conditions described in Example 1, undrawn spun yarn obtained from a melt spinning machine is continuously taken up and visually evaluated for the presence or absence of yarn breakage.

○: Occurrence of yarn breakage per hour is less than once

Δ: Yarn breakage occurs once or twice per hour

X: Thread breakage occurs more than 3 times per hour

X X: Yarn breakage frequently occurs, and continuous spinning is not possible.

[0065] (Strength and elongation)

Using a tensile and compression tester (INTESCO Model 201, manufactured by INTESCONET), measure the tensile strength and elongation of the obtained filament. Take one filament with a length of 40 mm, sandwich 10 mm of both ends of the filament with a backing paper (thin paper) with double-sided tape, and let it air dry overnight to make a sample with an effective length of 20 mm. Place the sample on the tester, perform the test at a temperature of 24 ° C, a humidity of 80% or less, a load of lZ30gF X fineness (denier), and a tensile speed of 20mmZ, and measure the strong elongation. The test is repeated 10 times under the same conditions, and the average value is defined as the filament elongation.

[0066] (Flame retardancy)

Cut a filament with a fineness of about 50dtex into a length of 150mm, bundle 0.7g, hold one end with a clamp, fix it on a stand and hang it vertically. Evaluate a fixed filament with an effective length of 120 mm by burning a 20 mm flame indirectly for 3 seconds and burning it.

Combustion quality

◎: Afterflame time 0 seconds (Do not ignite!)

〇: After flame time is less than 3 seconds

: After flame time 3 to 10 seconds

X: Afterflame time is 10 seconds or more

—Drip resistance—

◎: Number of drip is 0

◯: Number of drip is 5 or less

△: Number of drip is 6 ~ 10 X: The drip number is 11 or more.

[0067] (Iron set property)

It is an indicator of curling set by hair irons and curl shape retention. Lightly sandwich a tow filament with a length of 30 cm and a total fineness of 100,000 dtex in a hair eye heated to 180 ° C, and preheat it by handling it three times. At this time, the fusion between filaments, filament shrinkage, and thread breakage are visually evaluated. Then, preheat the filament to the hair iron, hold it for 10 seconds, and pull out the iron. Evaluate the ease of removal at this time (rod rod externality) and the curl retention when removed.

Fusion

○: No fusion

△: There is fusion that can be loosened with 3 or fewer hands.

X: There is a fusion that cannot be unraveled by hand

Crimp Z thread breakage

○: No shrinkage or thread breakage

△: 3 points or less of crimp and thread breakage

X: There is a shrinkage or thread breakage

Rod out

○: Iron rod comes out without resistance

Δ: Slight resistance

X: Resistance is difficult

—Set characteristics—

○: The curl shape is round and stable as soon as the set is attached

△: The set is cheap, but the curl shape is slightly broken into an ellipse

X: The set is difficult to attach, or the curl shape is greatly broken, or the curl is extended.

[0068] (Glossy)

The evaluation of fiber wrinkles was based on the gloss of the fibers. Gloss is evaluated visually by using a tow filament with a length of 30 cm and a total fineness of 100,000 dtex under sunlight.

◎: For human hair etc., gloss is adjusted to the level! ◯: Gloss is adjusted moderately

Δ: Slightly too glossy or slightly glossy

X: Too much gloss or too little gloss.

[0069] The raw materials used in the examples and comparative examples are as follows.

Polyester):

'Polyethylene terephthalate, manufactured by Nippon Pet Co., Ltd., BK-2180 (intrinsic viscosity = 0.83), Perez®

'Polyethylene terephthalate, manufactured by Kanebo Synthetic Co., Ltd., EFG 00 (intrinsic viscosity = 0.50), pellets

Bromine-containing flame retardant (B):

'Brominated phenoxy flame retardant, manufactured by Toto Kasei Co., Ltd., YPB-43M, pellets

• Brominated epoxy flame retardant, Sakamoto Pharmaceutical Co., Ltd., SR—T20000, powder

'Brominated epoxy flame retardant, manufactured by Sakamoto Yakuhin Kogyo Co., Ltd., SR-T2MR (SR- 20,000 with pellets), pellets

Gin-containing flame retardant:

Phosphate ester flame retardant: Daihachi Chemical Industry Co., Ltd., ρχ-200, granule

Antimony compounds (C):

'Antimonate triacid, manufactured by Nippon Seiko Co., Ltd., PATOX—P, powder

• Sodium antimonate, manufactured by Nippon Seiko Co., Ltd., SA-A, powder

Organic fine particles (D), inorganic fine particles (E):

• Cross-linked acrylic particles, manufactured by Soken Chemical Co., Ltd., MX—180TA, powder

'Melamine-silica composite particles, manufactured by Nissan Chemical Co., Ltd., Optobead 2000M, powder

'Silica, UNIMIN, Imsil A-8, powder

[0070] (Example 1)

Moisture content as polyester: 100 parts by weight of polyethylene terephthalate (BK-2180, intrinsic viscosity 0.83, pellets) dried to below lOOppm, 15 parts by weight of bromine-containing flame retardant (YPB 43M, pellets) and antimony compound After adding 2 parts by weight of antimony trioxide (PA TOX-P, powder) and dry blending, one raw material with LZD = 38 Using a twin screw extruder with a slot (Nippon Steel Works, TEX44), melt kneading at a cylinder setting temperature of 250 to 270 ° C and QZR = 1.5 to obtain a resin composition Got.

After drying the obtained rosin composition to a water content of lOOppm or less, using a melt spinning machine (SV30, manufactured by Shinko Machinery Co., Ltd.), setting the cylinder temperature to 260 to 280 ° C, the nozzle diameter 0 The molten polymer was discharged using a spinneret having a 5 mm φ round section nozzle hole, air-cooled with a cooling air of 20 ° C, and wound at a speed of lOOmZ to obtain an undrawn yarn. The obtained undrawn yarn was stretched 4 times using a heat roll heated to 85 ° C, heat-treated using a heat roll heated to 200 ° C, wound up at a speed of 30 mZ, and A polyester fiber (multifilament) having a fiber fineness of 51 dtex was obtained.

Dimethylsilicone fiber treatment agent (K-901, manufactured by Takemoto Yushi Co., Ltd.) and POZEO random copolymer polyether fiber treatment agent (KWC-Q, Maruhishi Oil Co., Ltd.) The solution is attached so that each fiber treatment agent is 0.2% omf and 0.1% omf, and dried at 130 ° C for 10 minutes using a hot air dryer. Let

[0071] (Example 2)

Other than changing bromine-containing flame retardant species and addition amount to 20 parts by weight of SR-T2MP (pellet) and antimony compound species and addition amount to 2 parts by weight of sodium antimonate (SA-A, powder) In the same manner as in Example 1, after obtaining a rosin composition, a polyester fiber (multifilament) having a single fiber fineness of 49 dtex was obtained.

[Examples 3 to 6]

Bromine-containing flame retardant SR—T2MP (pellet) and antimony compound sodium antimonate (SA-A, powder), respectively, except that the amounts added were changed as shown in Table 1, respectively. Thus, after obtaining a rosin composition, a polyester fiber (multifilament) having a single fiber fineness of about 50 dtex was obtained.

[0073] (Example 7-: LO)

Example 2 except that QZR was changed to 0.5 (Example 7), 0.8 (Example 8), 2.0 (Example 9), and 2.5 (Example 10), respectively. And after obtaining the rosin composition, the single fiber fineness is about A 50 dtex polyester fiber (multifilament) was obtained.

[Example 11]

Bromine-containing flame retardant species and addition amount to 20 parts by weight of SR—T20000 (powder) and 1 part by weight of antimony trimonate antimony trimonate (ΡΑΤΟΧ—Ρ, powder) Except for the change, the resin composition was obtained in the same manner as in Example 1, and then a polyester fiber (multifilament) having a single fiber fineness of 49 dtex was obtained.

[0075] (Example 12)

Polyethylene terephthalate (BK-2180, pellets) dried to a water content of lOOppm or less using a twin screw extruder (TEX4 4 manufactured by Nippon Steel Works, Ltd.) with LZD = 38 and one raw material inlet ) A dry blend of 20 parts by weight of bromine-containing flame retardant (SR-T2MP, pellets) with respect to 100 parts by weight was added from the first feeder, and sodium antimonate (SA -A, powder) 2 parts by weight were charged from the second feeder and melt kneaded at a cylinder setting temperature of 250 to 270 ° C. and QZR = 1.5 to obtain a resin composition. At this time, the ratio of the feed amount from the first feeder to the feed amount from the second feeder was 120: 2.

A polyester fiber (multifilament) having a single fiber fineness of 52 dtex was obtained by the same spinning operation as in Example 1 using the obtained greave composition.

[Example 13]

The ingredients of the second feeder are 2 parts by weight of sodium antimonate (SA-A, powder) as antimony compound and melamine silica composite particles as inorganic fine particles (manufactured by Nissan Chemical Co., Ltd., Optobeads) 2000M) Except for changing 4 parts by weight to a dry blended mixture and changing the ratio of the feed amount from the first feeder to the feed amount from the second feeder to 120: 2.4. In the same manner as in Example 12, after obtaining a resin composition, a polyester fiber (multifilament) having a single fiber degree of 50 dtex was obtained.

[0077] (Example 14)

The input component from the first feeder is 100 parts by weight of polyethylene terephthalate (BK-2180, pellets), and the input component from the second feeder is bromine-containing flame retardant (SR—T20 000, powder) 20 weights Parts and 1 part by weight of antimony trioxide antimony (PATOX—P, powder) In the same manner as in Example 123, except that the blended mixture was changed and the ratio of the feed amount from the first feeder to the feed amount of the second feeder was changed to 100: 21. After obtaining the composition, a polyester fiber (multifilament) having a single fiber fineness of 5 ldtex was obtained.

[Example 15]

If L / D = 38 and there are two inlets and the second inlet is 100, the distance between the first inlet and the tip of the screw is 100, it will be at 70 from the first inlet side. A twin screw extruder (TEX44, manufactured by Nippon Steel Works) was used. Moisture content as polyester: 100 parts by weight of polyethylene terephthalate (BK-2180, pellets) dried to less than lOOppm and a dry blend of 20 parts by weight of a bromine-containing flame retardant (SR-T2MP, pellets) Add 2 parts by weight of sodium antimonate (SA-A, powder) to the 2nd input part and melt under the conditions of cylinder set temperature 250 to 270 ° C and QZR = 1.2. The kneaded product was obtained by kneading. At this time, the ratio of the feed amount of the first input rocker to the feed amount of the second inlet force was 120: 2.

[0079] (Example 16)

2 parts by weight of sodium antimonate (SA-A, powder) as an antimony compound and 0.8 parts by weight of crosslinked acrylic particles (MX—180TA) as organic fine particles The mixture was changed to a dry blended mixture, and the ratio of the feed amount from the first input port to the feed amount from the second input port was changed to 120: 2.8. After obtaining the rosin composition, a polyester fiber (multifilament) having a single fiber fineness of 5 ldtex was obtained.

[0080] (Example 17)

The input component from the first input port is 100 parts by weight of polyethylene terephthalate (BK-2180, pellets), and the input component from the second input port is 20 parts by weight of a bromine-containing flame retardant (SR-T20000, powder) and Antimony triacid (ΡΑΤΟΧ— Ρ, powder) Changed to 1 part by weight of drive-dried mixture and feed amount of first input loca: second input loca The ratio of the cord amount was changed to 100: 21, and in the same manner as in Example 6, after obtaining a resin composition, a polyester fiber (multifilament) having a single fiber fineness of 50 dtex was obtained.

[0081] (Example 18)

If the distance between the first inlet and the tip of the screw is 100, the second inlet position is the same as in Example 15 except that the first inlet side force is also changed to the 50 position. After obtaining a fat composition, a polyester fiber (multifilament) having a single fiber fineness of 5 ldtex was obtained.

[0082] Tables 1 and 2 show the composition and charging conditions of the resin composition in the above Examples and Comparative Examples described later.

[0083] [Table 1]

As a result of evaluating the intrinsic viscosity and critical oxygen index of the obtained rosin composition, and Tables 3 and 4 show the results of evaluation of intrinsic viscosity, high elongation, flame retardancy, critical oxygen index, and iron setability using fibers formed from the resin composition.

[Table 3]

Plastic SS08 Except for changing to, a resin composition was obtained in the same manner as in Example 1, and then a polyester fiber (multifilament) having a single fiber fineness of 48 dt ex was obtained.

[0087] (Comparative Example 2)

As the flame retardant, instead of the bromine-containing flame retardant, the phosphorous-containing flame retardant (PX-200, granule) was changed to 10 parts by weight. A polyester fiber (multifilament) having a fiber fineness of 50 dtex was obtained.

[0088] (Comparative Example 3)

100 parts by weight of polyethylene terephthalate (BK-2180, pellets) dried to a water content of lOOppm or less, 10 parts by weight of bromine-containing flame retardant (YPB-43M, pellets) and silica (Imsil A-8, powder) 1.2 Except for using a mixture obtained by dry blending with addition of parts by weight, in the same manner as in Example 1, a polyester composition fiber (multifilament) having a single fiber fineness of 50 dtex was obtained after obtaining a resin composition. .

[0089] (Comparative Example 4)

100 parts by weight of polyethylene terephthalate (BK-2180, pellets) dried to a water content of lOOppm or less, 4 parts by weight of bromine-containing flame retardant (YPB-43M, pellets) and sodium antimonate (SA-A, powder) 2 Except that a mixture obtained by adding parts by weight and dry blending was used, a rosin composition was obtained in the same manner as in Example 1, and then a polyester fiber (multifilament) having a single fiber fineness of 50 dtex was obtained.

[0090] Using the results of evaluating the intrinsic viscosity and critical oxygen index of the obtained resin composition and the fibers formed from the resin composition, intrinsic viscosity, strength and elongation, flame retardancy Table 4 shows the results of evaluating the limiting oxygen index and iron setability.

[0091] As shown in Tables 3 and 4, in contrast to the comparative example, the example contains a brominated flame retardant and an antimony compound in a specific ratio with respect to the polyester, and has a limiting oxygen index (LOI) of 26 or more. And a polyester-based artificial hair that exhibits high flame retardancy without deterioration in strength, elongation, iron setability, etc., by using a greave composition having an intrinsic viscosity (IV) of 0.5 to 1.0 It was confirmed that It was confirmed that Sarako could control the wrinkle of the fiber by blending specific organic fine particles and Z or inorganic fine particles. Therefore, the present polyester-based artificial hair grease composition is made of polyester. It was confirmed that it can be effectively used as artificial hair with improved flame retardancy and setability while maintaining its mechanical and thermal properties.

Industrial applicability

[0092] In the present invention, a resin composition comprising a bromine-containing flame retardant and an antimony compound in a specific ratio with respect to polyester, having a limiting oxygen index (LOI) of 26 or more and an intrinsic viscosity The fiber properties such as heat resistance and high elongation of ordinary polyester fiber are maintained by melt spinning the flame retardant polyester artificial hair composition having IV of 0.5 to 1.0. In addition, a flame-retardant polyester artificial hair excellent in setability and spinnability can be obtained.

[0093] The polyester-based artificial hair obtained from the flame retardant polyester-based artificial hair composition of the present invention includes wig, two-pee, blade, weaving, hair extension, hair accessory, doll's hair It is suitable for processing into headdress products such as.

Claims

The scope of the claims

[1] Polyalkylene terephthalate and copolymer based mainly on polyalkylene terephthalate Polybromide-containing flame retardant (B) 5-30 with respect to 100 parts by weight of polyester (A) selected from the group consisting of polyester A fat composition comprising 5 parts by weight and an antimony compound (C) O. 5-10 parts by weight, wherein the critical oxygen index (LOI) of the fat composition is 26 or more, and A flame retardant polyester-based artificial hair composition characterized by having an intrinsic viscosity (IV) of the resin composition of 0.5 to 1.0.

[2] The greave composition for flame-retardant polyester artificial hair according to claim 1, wherein the polyalkylene terephthalate is at least one selected from the group consisting of polyethylene terephthalate, polypropylene terephthalate and polybutylene terephthalate.

[3] Bromine-containing flame retardant (B) is brominated aromatic flame retardant, bromine-containing phosphate ester flame retardant, brominated polystyrene flame retardant, brominated benzaryl acrylate flame retardant, brominated At least one selected from the group power consisting of Poxy flame retardant, Brominated phenoxy flame retardant, Brominated polycarbonate flame retardant, Tetrabromobisphenol A derivative, Bromine-containing triazine compound and Bromine-containing isocyanuric acid compound The flame retardant polyester-based artificial hair oil composition according to claim 1 or 2, which is a flame retardant.

[4] Antimony compound (C) force Any one of the antimony compounds selected from the group consisting of antimony trioxide, antimony tetroxide, antimony pentoxide, and sodium antimonate. A resin composition for flame retardant polyester-based artificial hair according to claim 1.

[5] The resin composition according to any one of claims 1 to 4, wherein the resin composition having component powers (A) to (C) further contains organic fine particles (D) and Z or inorganic fine particles (E). A flame retardant polyester-based artificial hair composition as described herein.

[6] The flame retardant according to claim 5, wherein the organic fine particles (D) are at least one selected from the group consisting of polyarylate, polyamide, fluorine resin, silicon resin, crosslinked talyl resin and crosslinked polystyrene. Polyester-based artificial hair rosin composition.

[7] Inorganic fine particles (E) are calcium carbonate, silicon oxide, titanium oxide, aluminum oxide, dumbbell, tanolec, kaolin, montmorillonite, bentonite, my strength and melamine 6. The flame retardant polyester-based artificial hair composition according to claim 5, which is at least one selected from the group power composed of Rica composite particles.

[8] The components of (A) to (E) are melt-kneaded using a twin screw extruder under a condition of QZR of 0.5 to 2.5. A method for producing a greave composition for artificial hair according to any one of the above.

[9] Using a twin screw extruder, the mixture of components (A) and (B) is also charged with the first feeder, then components (C) to (E) are charged from the second feeder and melted. The method for producing a greave composition for flame-retardant polyester-based artificial hair according to claim 8, which is kneaded.

[10] Using a twin screw extruder, the component (A) is charged from the first feeder, and then the mixture of the components (B) to (E) is also melted and kneaded by adding the force of the second feeder. Item 9. A process for producing a flame retardant polyester-based artificial hair composition according to Item 8.

[11] Using a twin-screw extruder having two inlets, the mixture of components (A) and (B) is charged to the first charging locus, and then components (C) to (E) are 9. The method for producing a flame retardant polyester artificial hair coagulant composition according to claim 8, which is introduced from an inlet and melted and kneaded.

[12] Using a twin screw extruder having two inlets, component (A) is introduced from the first inlet, and then the mixture of components (B) to (E) is introduced from the second inlet. The method for producing a flame retardant polyester artificial hair coagulant composition according to claim 8, which is charged and melt kneaded.

[13] The eleventh or twelfth aspect of the present invention, wherein the second inlet is located at a position of 40 to 80 when the distance between the first inlet and the tip of the screw is 100. A method for producing a resin composition for artificial hair.

[14] The process for producing a flame retardant polyester-based artificial hair grease composition according to any one of claims 8 to 13, wherein the LZD of the twin-screw extruder is 25 to 50.