WO2017179340A1 - 人工毛用樹脂組成物及びその成形体 - Google Patents
人工毛用樹脂組成物及びその成形体 Download PDFInfo
- Publication number
- WO2017179340A1 WO2017179340A1 PCT/JP2017/008943 JP2017008943W WO2017179340A1 WO 2017179340 A1 WO2017179340 A1 WO 2017179340A1 JP 2017008943 W JP2017008943 W JP 2017008943W WO 2017179340 A1 WO2017179340 A1 WO 2017179340A1
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- WIPO (PCT)
- Prior art keywords
- resin composition
- artificial hair
- polyester
- flame
- flame retardant
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
- A41G3/00—Wigs
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- 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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- 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
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- 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
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
- A41G3/00—Wigs
- A41G3/0083—Filaments for making wigs
Definitions
- the present invention relates to a resin composition for artificial hair and a formed product thereof.
- Patent Document 1 describes a vinyl chloride resin as a material constituting the fiber for artificial hair.
- the vinyl chloride resin is excellent in processability, low cost, transparency and the like.
- Patent Document 2 discloses a flame-retardant polyester fiber comprising a resin composition containing polyester, a bromine-containing flame retardant and an antimony compound. By adding a bromine-containing flame retardant and an antimony compound to the polyester, the flame retardancy of the polyester is solved.
- the fiber for artificial hair made of polyester has heat resistance to the hair iron, but it is flammable as described above, so it is desirable to impart flame retardancy from the viewpoint of wearer safety. .
- it is generally performed to add a flame retardant.
- Brominated flame retardants, phosphorus-based flame retardants, nitrogen-based flame retardants and hydrated metal compounds are commercially available as flame retardants, but the combination of brominated flame retardants and flame retardant aids gives the most flame retardancy. It is said that the effect is high.
- polyester and brominated flame retardants are incompatible combinations, when melt-kneaded, the dispersion of brominated flame retardants in the polyester resin becomes insufficient, resulting in poor transparency and combability. It was.
- Transparency has been solved to some extent by limiting the average particle size and addition amount of the antimony compound, but it is not as transparent as vinyl chloride fiber or nylon fiber, so it can be used as a fiber for artificial hair. It was insufficient.
- Combability has been solved to some extent by applying various silicone oils to the fiber, but since the silicone oils are flammable, there is a problem in that flame retardancy is reduced. was there.
- the present invention has been made in view of such circumstances, and has a resin composition for flame-retardant artificial hair having excellent transparency and combability similar to human hair, and excellent flame retardancy, and The molded body is provided.
- the present invention employs the following means in order to solve the above problems.
- B bromine-containing flame retardant
- the polyester (A) has a melt viscosity of 80 to 300 Pa ⁇ s.
- the resin composition for flame-retardant artificial hair according to (1) which contains ⁇ 15 parts by mass.
- the polyester (A) comprises polyethylene terephthalate and polybutylene terephthalate, and the mass ratio of the polyethylene terephthalate and polybutylene terephthalate is 40/60 to 98/2, (1) to (3)
- the polyester (A) comprises polyethylene terephthalate and polytrimethylene terephthalate, and the mass ratio of the polyethylene terephthalate and polytrimethylene terephthalate is 40/60 to 98/2.
- a fibrous shaped article comprising the flame retardant artificial hair resin composition according to any one of (1) to (5).
- the resin composition for flame-retardant artificial hair is selected from 100 parts by mass of polyester (A), poly (pentabromobenzyl acrylate), brominated phenol resin, and polydibromophenylene oxide agent. It contains 5 to 40 parts by mass of a bromine-containing flame retardant (B) containing at least one kind, and the polyester (A) has a melt viscosity of 80 to 300 Pa ⁇ s.
- the polyester (A) is not particularly limited, and includes a hydroxycarboxylic acid-based polyester resin in addition to a polyester resin obtained from an aromatic or aliphatic polyfunctional carboxylic acid and a polyfunctional glycol.
- Specific examples of the former include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polyethylene adipate, polybutylene adipate, and other copolymers thereof.
- polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate and / or these are the main components (the main component means containing 80 mol% or more of polyalkylene terephthalate), and a small amount of a copolymer component.
- the copolymerized polyester to be contained can be used as the polyester (A), but polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate are particularly preferable from the viewpoints of the tactile sensation of fibers, availability, and cost.
- the polyester (A) is a resin obtained by mixing polyethylene terephthalate and polybutylene terephthalate or polytrimethylene terephthalate, and has a better tactile sensation similar to human hair.
- the mass ratio of polyethylene terephthalate and polybutylene terephthalate or the mass ratio of polyethylene terephthalate and polytrimethylene terephthalate is preferably 40/60 to 98/2, and more preferably 65/35 to 96/4. . If the mass ratio of polyethylene terephthalate is 40/60 or more, heat resistance of a certain level or more tends to be obtained, and by setting it to 98/2 or less, the effect of improving tactile sensation tends to be obtained.
- copolymer component examples include isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, paraphenylene dicarboxylic acid, trimellitic acid, pyromellitic acid, succinic acid, glutaric acid, adipic acid, superic acid, azelaic acid, sebacin Acids, polycarboxylic acids such as dodecanedioic acid, derivatives thereof, dicarboxylic acids including sulfonates such as 5-sodium sulfoisophthalic acid, dihydroxyethyl 5-sodium sulfoisophthalate, derivatives thereof, 1,2-propanediol 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, diethylene glycol, polyethylene glycol, trimethylolpropane, pentaerythr
- the copolymerized polyester is usually produced by reacting a polymer of terephthalic acid and / or its derivative (for example, methyl terephthalate) as a main component with an alkylene glycol containing a small amount of a copolymer component.
- a polymer of terephthalic acid and / or its derivative for example, methyl terephthalate
- an alkylene glycol containing a small amount of a copolymer component is preferable from the viewpoint of stability and ease of operation, but a monomer that is a smaller amount of a copolymer component in a mixture of terephthalic acid and / or its derivative (for example, methyl terephthalate) as a main component and alkylene glycol.
- it may be produced by polymerizing an oligomer component.
- the polyester (A) is contained in an amount of 50% by mass or more, 60% by mass or more, or 80% by mass or more based on the resin composition.
- the melt viscosity of the polyester (A) is 80 to 300 Pa ⁇ s, preferably 100 to 250 Pa ⁇ s, more preferably 120 to 170 Pa ⁇ s. If the melt viscosity is 80 Pa ⁇ s or more, sufficient shearing is applied, the dispersibility of the bromine-containing flame retardant tends to be good, and the combing property tends to be good. When the melt viscosity is 300 Pa ⁇ s or less, the difference in viscosity from the bromine-containing flame retardant is reduced, so that the dispersibility of the bromine-containing flame retardant becomes good and the combing property tends to be good.
- the melt viscosity in the present embodiment is measured on pellets that have been dehumidified and dried so that the water absorption rate is 100 ppm or less under the conditions of a sample amount of 20 cc, a set temperature of 285 ° C., a piston speed of 200 mm / min, a capillary length of 20 mm, and a capillary diameter of 1 mm. It is the value.
- the measuring instrument used was a Capillograph 1D manufactured by Toyo Seiki Seisakusho.
- bromine-containing flame retardant (B) examples include poly (pentabromobenzyl acrylate), brominated phenol resin, and polydibromophenylene oxide. These may be used alone or in combination of two or more. By using the bromine-containing flame retardant (B), it is possible to improve the transparency and combability, which are problems of conventional flame retardant artificial hair fibers.
- the amount of the bromine-containing flame retardant (B) is 5 to 40 parts by weight, preferably 10 to 30 parts by weight, more preferably 15 to 25 parts by weight, based on 100 parts by weight of the polyester (A). is there. If the amount of the bromine-containing flame retardant (B) is 5 parts by mass or more, flame retardancy is obtained, and if it is 40 parts by mass or less, the tactile sensation does not deteriorate.
- the resin composition for flame-retardant artificial hair of this embodiment may contain a bromine-containing flame retardant (C).
- a bromine-containing flame retardant (C) examples include brominated polystyrene, ethylene bistetrabromophthalimide, bis (pentabromophenyl) ethane, brominated epoxy resin and brominated phenoxy resin. These may be used alone or in combination of two or more. By blending the bromine-containing flame retardant (C), an appearance resembling human hair having lower gloss can be imparted.
- the amount of the bromine-containing flame retardant (C) is 0.1 to 15 parts by weight, preferably 0.3 to 5.0 parts by weight, based on 100 parts by weight of the polyester (A). More preferred is 5 to 3.0 parts by mass. If the amount of the bromine-containing flame retardant (C) is 0.1 parts by mass or more, the effect of imparting low gloss is obtained, and if it is 15 parts by mass or less, the transparency and combability are deteriorated. Hateful.
- the resin composition for flame-retardant artificial hair of this embodiment may contain a fuel aid (D).
- a fuel aid D
- antimony trioxide, antimony tetroxide, antimony pentoxide, sodium antimonate, zinc borate, zinc stannate are preferable, and antimony trioxide and sodium antimonate are flame retardant and transparent. From the viewpoint of sex. These may be used alone or in combination of two or more. By blending the flame retardant aid (D), the flame retardancy can be further improved.
- the average particle size of the flame retardant aid (D) is 0.5 to 3.5 ⁇ m, preferably 0.6 to 1.8 ⁇ m, more preferably 0.7 to 1.5 ⁇ m. If the average particle size is 0.5 ⁇ m or more, aggregation is unlikely to occur and uniform dispersion can be achieved, so that non-uniformity in flame retardancy is unlikely to occur. If the average particle diameter is 3.5 ⁇ m or less, thread breakage with this as a base point hardly occurs.
- the blending amount of the flame retardant aid (D) is 0.1 to 10 parts by weight, preferably 0.3 to 5 parts by weight, based on 100 parts by weight of the polyester (A).
- the amount is preferably 0.5 to 3 parts by mass. If the blending amount of the flame retardant aid is 0.1 parts by mass or more, the effect of improving the flame retardancy is obtained, and if it is 10 parts by mass or less, the transparency is hardly deteriorated.
- the average particle size of the flame retardant aid (D) in this embodiment is adjusted by adding a suitable amount of flame retardant aid to 100 ml of a dispersant solution prepared by adding 0.05 wt% liquid detergent to distilled water. Further, after adding 40 ml of distilled water, the suspension prepared by irradiating with an ultrasonic generator with an output of 160 W for 2 minutes is a value measured by a laser diffraction particle size distribution measurement method.
- the measuring instrument used was Microtrack MT3300EXII manufactured by Nikkiso Co., Ltd.
- the resin composition for artificial hair used in the present embodiment has additives as necessary, for example, heat-resistant agents, light stabilizers, fluorescent agents, antioxidants, antistatic agents, pigments, dyes, plasticizers, A lubricant or the like can be contained.
- a colorant such as a pigment or a dye, a pre-colored fiber (so-called original fiber) can be obtained.
- the resin composition for artificial hair of the present embodiment can be used for the production of artificial hair such as wigs, hair wigs, false eyelashes and false eyelashes.
- the resin composition of one embodiment according to the present invention is produced, for example, by dry blending the polyester (A) and the bromine-containing flame retardant (B) and then melt-kneading using various general kneaders.
- the kneader include a single screw extruder, a twin screw extruder, a roll, a Banbury mixer, and a kneader.
- a twin screw extruder is preferable from the viewpoint of adjusting the degree of kneading and ease of operation.
- the fiber for artificial hair can be produced by melt spinning by a normal melt spinning method under an appropriate temperature condition depending on the type of polyester.
- polyester polyethylene terephthalate
- bromine-containing flame retardant poly (pentabromobenzyl acrylate)
- the temperature of the melt spinning apparatus such as an extruder, a die, and a gear pump as required. Is melt-spun at 260 to 290 ° C., cooled in a water tank containing cooling water, and the take-up speed is adjusted while controlling the fineness to obtain an undrawn yarn.
- the temperature of the melt spinning apparatus can be appropriately adjusted according to the intrinsic viscosity of the polyester and the mass ratio of the polyester and the bromine-containing flame retardant.
- spinning by cooling with cold air is possible regardless of cooling by the water tank.
- the temperature of the cooling water tank, the temperature of the cold air, the cooling time, and the take-up speed can be appropriately adjusted according to the discharge amount and the number of holes in the die.
- melt spinning not only a simple circular shape, but also a spinning nozzle with a special nozzle hole shape, and the artificial hair fiber cross-sectional shape should be modified to a deformed shape such as saddle type, Y type, H type, X type, petal type, etc. You can also.
- the obtained undrawn yarn is subjected to a drawing treatment in order to improve the tensile strength of the fiber.
- the drawing process is a two-step method in which an undrawn yarn is wound around a bobbin and then drawn in a step different from the melt spinning step, or direct spinning drawing in which the yarn is continuously drawn from the melt spinning step without being wound around the bobbin. Any of the methods may be used.
- the stretching process is performed by a one-stage stretching method in which stretching is performed at a time to a predetermined stretching ratio, or a multi-stage stretching method in which stretching is performed to a predetermined stretching ratio by two or more stretching.
- a heating roller, a heat plate, a steam jet device, a hot water tank, or the like can be used as a heating means when performing the heat stretching treatment, and these can be used in combination as appropriate.
- the fineness of the fibrous molded body of the artificial hair resin composition of the present embodiment is preferably 10 to 150 dtex, more preferably 30 to 150 dtex, and still more preferably 35 to 120 dtex.
- Example 1 Poly (pentabromobenzyl) which is 100 parts by mass of polyethylene terephthalate (manufactured by Mitsui Chemicals, J125S, melt viscosity 145 Pa ⁇ s) which is a polyester (A) dried so that the moisture absorption is less than 100 ppm and bromine-containing flame retardant (B) Acrylate) (ICL JAPAN, FR-1025) 7 parts by mass were blended and then kneaded using a ⁇ 30 mm twin screw extruder to obtain raw material pellets for spinning.
- polyethylene terephthalate manufactured by Mitsui Chemicals, J125S, melt viscosity 145 Pa ⁇ s
- B bromine-containing flame retardant
- ICL JAPAN FR-1025
- melt spinning is performed at 270 ° C. using a ⁇ 40 mm uniaxial melt spinning machine, and the molten resin discharged from a die having a hole diameter of 0.5 mm / piece is obtained. While cooling through a water bath of about 30 ° C., the discharge amount and the winding speed were adjusted to produce an undrawn yarn having a set fineness.
- the obtained undrawn yarn was drawn at 85 ° C. and then annealed at 150 ° C. to obtain a fiber for artificial hair having a predetermined degree of maintenance.
- the draw ratio was 3 times and the relaxation rate during annealing was 3%.
- the relaxation rate during annealing is a value calculated by (rotational speed of winding roller during annealing) / (rotational speed of feeding roller during annealing).
- the fibrous molded body of the obtained resin composition for artificial hair was evaluated for flame retardancy, transparency, touch, combability and gloss according to the evaluation method and criteria described below.
- Examples 2 to 24 Except that the blending was set as shown in Table 1, fiber shaped bodies of artificial hair resin compositions according to Examples 2 to 24 were prepared and evaluated in the same manner as Example 1.
- Example 1 It was produced in the same manner as in Example 2 except that polyethylene terephthalate (manufactured by our company, melt viscosity: 65 Pa ⁇ s) was used as the polyester (A). As a result, the combing property deteriorated. This is probably because the melt viscosity of the polyester (A) is low, so that sufficient shear is not applied and the dispersibility of the bromine-containing flame retardant becomes poor.
- the flame retardancy is obtained by bundling the fibrous molded bodies of the resin compositions for artificial hair of Examples and Comparative Examples to a length of 300 mm and a weight of 2 g, fixing one end of the fiber bundle vertically and extending it to the lower end. A flame having a thickness of 20 mm was contacted for 5 seconds, and then the fire spread time after separation was measured and evaluated according to the following evaluation criteria. The average value of the results of 10 measurements was used as the result.
- ⁇ Fire spread time is 1 second or more and less than 7 seconds
- ⁇ Fire spread time is 7 seconds or more
- Transparency is obtained by bundling a fibrous molded body of a resin composition for artificial hair into a length of 250 mm and a weight of 20 g, and a fiber treatment engineer for artificial hair (5 years or more of practical experience) visually compares with human hair, Evaluation was performed according to the following evaluation criteria.
- Double-circle It has the transparency similar to human hair or almost close to human hair.
- ⁇ A slight turbidity is observed compared to human hair when compared finely, but it has transparency that can withstand use as a fiber for artificial hair.
- X At first glance, it is clearly cloudy and a difference from human hair is recognized.
- ⁇ Tactile sense> The tactile sensation was determined by touching the fiber shaped molded body of the resin composition for artificial hair to a length of 250 mm and a weight of 20 g, and using the hands of 10 fiber treatment engineers for artificial hair (at least 5 years of practical experience). It was evaluated with. ⁇ : Nine or more engineers evaluated that tactile sensation was good ⁇ : Seven or eight engineers evaluated that tactile sensation was good ⁇ : Six or less engineers evaluated that tactile sensation was good What
- ⁇ Combination> For the combing property, a fibrous molded body of the resin composition for artificial hair was bundled into a length of 300 mm and a weight of 2 g, and resistance and entanglement of the fiber when the comb was passed through the fiber bundle were evaluated. ⁇ : There is no resistance and the fibers do not get entangled ⁇ : There is some resistance, but the fibers do not get tangled ⁇ : There is resistance or the fibers get tangled
- Glossiness is obtained by bundling a fibrous molded body of a resin composition for artificial hair into a length of 250 mm and a weight of 20 g, and a fiber processing engineer for artificial hair (at least 5 years of practical experience) observes it under sunlight. The hair was compared with hair and evaluated according to the following evaluation criteria.
- polyester (A) composed of at least one of polyalkylene terephthalate or copolymerized polyester mainly composed of polyalkylene terephthalate, poly (pentabromobenzyl acrylate), brominated Containing 5 to 40 parts by mass of a bromine-containing flame retardant (B) containing at least one selected from a phenol resin and polydibromophenylene oxide, and the polyester (A) has a melt viscosity of 80 to 300 Pa ⁇ s. It was found that by using the flame-retardant resin composition for artificial hair, a fibrous molded article containing the resin composition for artificial hair excellent in flame retardancy, transparency, and combability was obtained.
- a bromine-containing flame retardant (C) selected from brominated polystyrene, ethylenebistetrabromophthalimide, bis (pentabromophenyl) ethane, brominated epoxy resin and brominated phenoxy resin By doing so, it was found that the gloss can be made closer to human hair. Furthermore, about polyester (A), it turned out that tactile sensation can be made closer to human hair by using resin which mixed polyethylene terephthalate and polybutylene terephthalate or polytrimethylene terephthalate.
- the artificial hair resin composition of the present invention By using the artificial hair resin composition of the present invention, it is possible to obtain an artificial hair product having good transparency and combability similar to human hair and excellent in flame retardancy.
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Abstract
Description
ポリエステルに難燃性を付与しようとする場合、難燃剤を添加することが一般的に行われている。難燃剤としては、臭素系難燃剤やリン系難燃剤、窒素系難燃剤や水和金属化合物などが市販されているが、臭素系難燃剤と難燃助剤の組み合わせが最も難燃性の付与効果が高いとされている。
しかしながら、ポリエステルと臭素系難燃剤は相溶性のない組み合わせのため、溶融混練した場合にポリエステル樹脂中で臭素系難燃剤の分散が不十分となり、透明性や櫛通り性が悪いという問題点があった。
(1)ポリエステル(A)100質量部と、ポリ(ペンタブロモベンジルアクリレート)、臭素化フェノール樹脂及びポリジブロモフェニレンオキシドより選択される少なくとも1種の臭素含有難燃剤(B)5~40質量部を含み、前記ポリエステル(A)の溶融粘度が80~300Pa・sであることを特徴とする難燃性人工毛用樹脂組成物。
(2)さらに、臭素化ポリスチレン、エチレンビステトラブロモフタルイミド、ビス(ペンタブロモフェニル)エタン、臭素化エポキシ樹脂及び臭素化フェノキシ樹脂より選択される少なくとも1種の臭素含有難燃剤(C)0.1~15質量部を含有することを特徴とする(1)に記載の難燃性人工毛用樹脂組成物。
(3)さらに、平均粒子径0.5~1.5μmの難燃助剤(D)を含有することを特徴とする(1)または(2)に記載の難燃性人工毛用樹脂組成物。
(4)前記ポリエステル(A)がポリエチレンテレフタレート及びポリブチレンテレフタレートからなり、前記ポリエチレンテレフタレート及びポリブチレンテレフタレートの質量比が40/60~98/2であることを特徴とする(1)~(3)のいずれか一項に記載の難燃性人工毛用樹脂組成物。
(5)前記ポリエステル(A)がポリエチレンテレフタレート及びポリトリメチレンテレフタレートからなり、前記ポリエチレンテレフタレート及びポリトリメチレンテレフタレートの質量比が40/60~98/2であることを特徴とする(1)~(3)のいずれか一項に記載の難燃性人工毛用樹脂組成物。
(6)(1)~(5)のいずれか一項に記載の難燃性人工毛用樹脂組成物を含む繊維状成形体。
(7)(6)に記載の繊維状成形体を含むかつら。
ポリエステル(A)は、特に限定はなく、芳香族または脂肪族多官能カルボン酸と多官能グリコールより得られるポリエステル樹脂以外に、ヒドロキシカルボン酸系のポリエステル樹脂を含む。前者の具体例としては、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、ポリブチレンナフタレート、ポリエチレンアジペート、ポリブチレンアジペートおよびこれらのその他の共重合体が挙げられる。
ある実施態様において、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリトリメチレンテレフタレート及び/またはこれらを主体とし(主体とは、ポリアルキレンテレフタレートを80モル%以上含有することをいう。)、少量の共重合成分を含有する共重合ポリエステルをポリエステル(A)として用いることができるが、ポリエチレンテレフタレート、ポリトリメチレンテレフタレート、ポリブチレンテレフタレートが、繊維の触感、入手の容易性、およびコストの点から、特に好ましい。
臭素含有難燃剤(B)としては、ポリ(ペンタブロモベンジルアクリレート)、臭素化フェノール樹脂およびポリジブロモフェニレンオキシドが挙げられる。これらは1種で用いてもよく、2種以上を組み合わせて用いてもよい。臭素含有難燃剤(B)を用いることで、従来の難燃性人工毛髪用繊維の課題であった、透明性および櫛通り性を改善することができる。
本実施態様の難燃性人工毛用樹脂組成物は、臭素含有難燃剤(C)を含有してもよい。臭素含有難燃剤(C)としては、臭素化ポリスチレン、エチレンビステトラブロモフタルイミド、ビス(ペンタブロモフェニル)エタン、臭素化エポキシ樹脂及び臭素化フェノキシ樹脂が挙げられる。これらは1種で用いてもよく、2種以上を組み合わせて用いてもよい。臭素含有難燃剤(C)を配合することにより、より低光沢性をもつ人毛に似た外観を付与することができる。
本実施態様の難燃性人工毛用樹脂組成物は、燃助剤(D)を含有してもよい。難燃助剤(D)としては、三酸化アンチモン、四酸化アンチモン、五酸化アンチモン、アンチモン酸ナトリウム、ホウ酸亜鉛、錫酸亜鉛が好ましく、三酸化アンチモン及びアンチモン酸ナトリウムが、難燃性と透明性の観点からより好ましい。これらは1種で用いてもよく、2種以上を組み合わせて用いてもよい。難燃助剤(D)を配合することにより、より難燃性を向上させることができる。
以下に、ある実施態様における難燃性人工毛用樹脂組成物及びその繊維状成形体の製造工程の一例を説明する。
溶融紡糸の際、単純な円形のみならず、ノズル孔が特殊形状の紡糸ノズルを用い、人工毛繊維の断面形状を繭型、Y型、H型、X型、花びら型等の異形にすることもできる。
ポリエチレンテレフタレート(自社製、溶融粘度65Pa・s)
ポリエチレンテレフタレート(三井化学製、J125S、溶融粘度145Pa・s)
ポリエチレンテレフタレート(自社製、溶融粘度280Pa・s)
ポリエチレンテレフタレート(三井化学製、J055、溶融粘度450Pa・s)
ポリブチレンテレフタレート(デュポン製、S600F20、溶融粘度118Pa・s)
ポリトリメチレンテレフタレート(デュポン製、ソロナEP3301NC010、溶融粘度132Pa・s)
ポリ(ペンタブロモベンジルアクリレート)(ICL JAPAN製、FR-1025)
臭素化フェノール樹脂(ケムチュラ・ジャパン製、Emerald1000)
ポリジブロモフェニレンオキシド(第一工業製薬製、ピロガードSR-460B)
臭素化ポリスチレン(マナック製、PS1200)
エチレンビステトラブロモフタルイミド(UNIBROM製、EcoFlameB-951)
ビス(ペンタブロモフェニル)エタン(アルベマール日本製、SAYTEX8010)
臭素化エポキシ樹脂(阪本薬品工業製、SR-T20000)
臭素化フェノキシ樹脂(新日鉄住金化学製、YPB-43C)
三酸化アンチモン(日本精鉱製、PATOX-KF、平均粒子径0.8μm)
三酸化アンチモン(日本精鉱製、PATOX-K、平均粒子径1.2μm)
三酸化アンチモン(日本精鉱製、PATOX-P、平均粒子径3.0μm)
アンチモン酸ナトリウム(日本精鉱製、SA-A平均粒子径2.0μm)
吸湿率が100ppm未満になる様に乾燥したポリエステル(A)であるポリエチレンテレフタレート(三井化学製、J125S、溶融粘度145Pa・s)100質量部及び臭素含有難燃剤(B)であるポリ(ペンタブロモベンジルアクリレート)(ICL JAPAN製、FR-1025)7質量部をブレンドした後、φ30mm二軸押出機を用いて混練し、紡糸用の原料ペレットを得た。
配合を表1に示すように設定した以外は実施例1と同様にして、実施例2~24に係る人工毛用樹脂組成物の繊維状成形体を作製し、評価した。
ポリエステル(A)としてポリエチレンテレフタレート(自社製、溶融粘度65Pa・s)を使用した以外は、実施例2と同様にして作製した。その結果、櫛通り性が悪くなった。ポリエステル(A)の溶融粘度が低いため十分なせん断がかからず、臭素含有難燃剤の分散性が不良となったためと考えられる。
ポリエステル(A)としてポリエチレンテレフタレート(三井化学製、J055、溶融粘度450Pa・s)を使用した以外は、実施例2と同様にして作製した。その結果、櫛通り性が悪くなった。ポリエステル(A)の溶融粘度が高いためポリ(ペンタブロモベンジルアクリレート)との粘度差が大きくなり、ポリ(ペンタブロモベンジルアクリレート)の分散性が不良になったためと考えられる。
ポリ(ペンタブロモベンジルアクリレート)(ICL JAPAN製、FR-1025)の配合量を3質量部とした以外は、実施例1と同様にして作製した。その結果、難燃性が得られなかった。
ポリ(ペンタブロモベンジルアクリレート)(ICL JAPAN製、FR-1025)の配合量を45質量部とした以外は、実施例1と同様にして作製した。その結果、触感が悪くなった。
臭素含有難燃剤(B)を配合せず、臭素化ポリスチレン(マナック製、PS1200)の配合量を20部質量部とした以外は、実施例1と同様にして作製した。その結果、透明性と櫛通り性が悪くなった。
臭素含有難燃剤(B)を配合せず、臭素化エポキシ樹脂(阪本薬品工業製、SR-T20000)の配合量を20部質量部とした以外は、実施例1と同様にして作製した。その結果、透明性と櫛通り性が悪くなった。
難燃性は、実施例・比較例の人工毛用樹脂組成物の繊維状成形体を長さ300mm、重量2gに束ね、この繊維束の一端を固定して垂直にたらし、その下端に長さ20mmの炎を5秒間接触させた後、離した後の延焼時間を測定して、次の評価基準で評価した。結果は、10回測定した結果の平均値を使用した。
◎:延焼時間が1秒未満
○:延焼時間が1秒以上7秒未満
×:延焼時間が7秒以上
透明性は、人工毛用樹脂組成物の繊維状成形体を長さ250mm、重量20gに束ね、人工毛髪用繊維処理技術者(実務経験5年以上)が目視により人毛と比較評価を行い、次の評価基準で評価した。
◎:人毛と同様、または概ね人毛に近い透明性を有する。
○:細かく比較すると人毛よりも若干の白濁が認められるが、概ね人工毛髪用繊維としての使用に耐えうる透明性を有する。
×:一見して、明らかに白濁しており、人毛との差異が認められる。
触感は、人工毛用樹脂組成物の繊維状成形体を長さ250mm、重量20gに束ね、人工毛髪用繊維処理技術者(実務経験5年以上)10人の手触りによる判定で、次の評価基準で評価した。
◎:技術者9人以上が、触感が良いと評価したもの
○:技術者の7人又は8人が、触感が良いと評価したもの
×:技術者の6人以下が、触感が良いと評価したもの
櫛通り性は、人工毛用樹脂組成物の繊維状成形体を長さ300mm、重量2gに束ね、この繊維束に櫛を通した時の、抵抗や繊維の絡まりを評価した。
◎: 抵抗がなく、繊維が絡まない
○:やや抵抗があるが、繊維が絡まない
×: 抵抗がある、または繊維が絡まる
光沢は、人工毛用樹脂組成物の繊維状成形体を長さ250mm、重量20gに束ね、人工毛髪用繊維処理技術者(実務経験5年以上)が太陽光の下で観察し、目視により人毛と比較評価を行い、次の評価基準で評価した。
◎:人毛と同様な光沢感を有する
○:人毛と比較すると差異が認められるが、概ね人毛に近い光沢を有する
さらに、臭素化ポリスチレン、エチレンビステトラブロモフタルイミド、ビス(ペンタブロモフェニル)エタン、臭素化エポキシ樹脂および、臭素化フェノキシ樹脂から選択される臭素含有難燃剤(C)を0.1~15質量部配合する事で、光沢を人毛に一層近づけることができることが分かった。
さらに、ポリエステル(A)について、ポリエチレンテレフタレートとポリブチレンテレフタレートまたはポリトリメチレンテレフタレートを混合した樹脂とすることで、触感を人毛に一層近づけることができることが分かった。
Claims (7)
- ポリエステル(A)100質量部と、ポリ(ペンタブロモベンジルアクリレート)、臭素化フェノール樹脂及びポリジブロモフェニレンオキシドより選択される少なくとも1種の臭素含有難燃剤(B)5~40質量部を含み、前記ポリエステル(A)の溶融粘度が80~300Pa・sであることを特徴とする難燃性人工毛用樹脂組成物。
- さらに、臭素化ポリスチレン、エチレンビステトラブロモフタルイミド、ビス(ペンタブロモフェニル)エタン、臭素化エポキシ樹脂及び臭素化フェノキシ樹脂より選択される少なくとも1種の臭素含有難燃剤(C)0.1~10質量部を含有することを特徴とする請求項1に記載の難燃性人工毛用樹脂組成物。
- さらに、平均粒子径0.5~1.5μmの難燃助剤(D)を含有することを特徴とする請求項1または2に記載の難燃性人工毛用樹脂組成物。
- 前記ポリエステル(A)がポリエチレンテレフタレート及びポリブチレンテレフタレートからなり、前記ポリエチレンテレフタレート及びポリブチレンテレフタレートの質量比が40/60~98/2であることを特徴とする請求項1~3のいずれか一項に記載の難燃性人工毛用樹脂組成物。
- 前記ポリエステル(A)がポリエチレンテレフタレート及びポリトリメチレンテレフタレートからなり、前記ポリエチレンテレフタレート及びポリトリメチレンテレフタレートの質量比が40/60~98/2であることを特徴とする請求項1~3のいずれか一項に記載の難燃性人工毛用樹脂組成物。
- 請求項1~5の何れか一項に記載の難燃性人工毛用樹脂組成物を含む繊維状成形体。
- 請求項6に記載の繊維状成形体を含むかつら。
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KR20230050228A (ko) | 2021-10-07 | 2023-04-14 | 주식회사 엘지화학 | 인계 올리고머, 이를 포함하는 폴리에스터 수지 및 열가소성 수지 조성물 |
WO2023068745A1 (ko) | 2021-10-18 | 2023-04-27 | 주식회사 엘지화학 | 인계 난연제 및 이를 포함하는 열가소성 수지 조성물 |
KR20230055379A (ko) | 2021-10-18 | 2023-04-25 | 주식회사 엘지화학 | 인계 난연제 및 이를 포함하는 열가소성 수지 조성물 |
KR20230073748A (ko) | 2021-11-19 | 2023-05-26 | 주식회사 엘지화학 | 난연성이 우수한 폴리에스터 수지, 상기 폴리에스터 수지를 포함하는 열가소성 수지 조성물 및 성형품 |
KR20230092717A (ko) | 2021-12-17 | 2023-06-26 | 주식회사 엘지화학 | 인계 모노머 또는 올리고머, 이를 포함하는 폴리에스터 수지 및 열가소성 수지 조성물 |
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