JP3134421B2 - Polyester monofilament bundle for artificial hair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bundle of polyester monofilaments for artificial hair having an appropriate surface gloss of human hair and an appropriate matting property.

[0002]

2. Description of the Related Art In recent years, as a material for artificial hair used for wigs, hair wigs, artificial hair, hair bands, etc., in recent years, a fiber mainly composed of a saturated polyester represented by polyethylene terephthalate has been known for its excellent tensile strength and heat resistance. It has come to be widely used in terms of good set retention and the like. When using fibers containing saturated polyester as the main component as artificial hair, in addition to characteristics such as easy setability, set retention, combability, and little fading due to light, it has a moderate matting property especially close to human hair. Although an appropriate surface gloss is required, the polyester fiber produced by a conventional method as it is has a flat yarn surface and a high refractive index of light, and therefore has a high surface gloss and cannot be applied to artificial hair. In order to improve this point, techniques for matting polyester fiber surfaces have been proposed. For example, a method is known in which a number of abrasions are caused on the surface of a polyester fiber to roughen the surface to obtain matte artificial hair. However, the matte fiber obtained by this method has a disadvantage that the fiber strength is reduced due to abrasion generated on the fiber surface. Japanese Patent Application Laid-Open No. 63-12716 discloses a polyester for artificial hair in which polyester fibers containing fine particles mainly composed of silicon oxide are treated with an alkaline aqueous solution to form specific fine irregularities on the fiber surface. Fibers and methods for making the same are disclosed. However, the fiber obtained by this method is not sufficiently matte because the surface irregularities are too fine and uniform, and it is recognized that when receiving light from an oblique direction, it shows strong light reflection,
Use as artificial hair was restricted.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a bundle of polyester monofilaments for artificial hair which does not have the above-mentioned various problems and has an appropriate surface gloss of human hair and an appropriate matting property.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a monofilament having a concave portion on its surface, in which the maximum length of the opening is not less than 2 μm and not more than 30 μm. 5 to 95 polyester monofilaments having 10 filaments, and 10 ³ or more surface protrusions having a height from the yarn surface of 0.5 μm or more and 8 μm or less per 1 mm 2 of the yarn surface area.
0 Polyester monofilament 95 or less having ⁵ or less
It can be achieved by a polyester monofilament bundle for artificial hair obtained by blending 5 parts with each other. Hereinafter, the present invention will be described in detail. The polyester monofilament bundle for artificial hair of the present invention refers to all or a part of various objects to be attached to a hair portion or a head for the purpose of supplementing hair such as a wig, a hair wig, a false hair, or a hair band, or for the purpose of fashion. It refers to the constituent fiber material. The polyester monofilament polyester constituting the polyester monofilament bundle for artificial hair of the present invention is a polyester having terephthalic acid as a main difunctional carboxylic acid and ethylene glycol or 1,4-butanediol as a main glycol component. Preferred are those in which part or all of terephthalic acid is replaced with 2,6-naphthalenedicarboxylic acid, 4,4'-dicarboxyphenoxymethane, isophthalic acid, etc., or one of ethylene glycol or 1,4-butanediol. A part or the whole may be replaced with diethylene glycol, propylene glycol, an EO adduct of bisphenol-A, or the like. In addition, a small amount may be a copolymer of a trifunctional compound such as trimesic acid, trimellitic acid, boric acid, glycerin, and trimethylolpropane. In addition, the polyester is another thermoplastic synthetic resin for the purpose of modification,
For example, polyamides such as nylon 6, nylon 6.6, polyolefins such as polyethylene and polypropylene, and fluorine-containing polymers such as polytetrafluoroethylene, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, etc. from 0.5% by weight. It can be blended with polyester in the range of 50% by weight.

The polyester monofilament bundle for artificial hair of the present invention has a maximum opening length of 2 μm on the yarn surface.
Above, 5 to 95 polyester monofilaments having 0.1 to 10 concave portions of 30 μm or less per 100 square μm of yarn surface area, and a height from the yarn surface of 0.5 μm
As described above, it is essential that 95 to ⁵ parts of polyester monofilaments having 10 ³ or more and 10 ⁵ or less surface protrusions of 8 μm or less per square millimeter of yarn surface area are blended. Polyet for artificial hair of the present invention
Yarn constituting the monofilament bundle
The maximum length of the concave part on the surface and the number of concave parts per unit area are
Hitachi Ltd. S-4000 Electron emission scanning electron microscope
Using a mirror, the surface of the filament is magnified by 500 times
It was measured from a photograph taken in zero field of view. The polyester monofilament having a concave portion on the surface constituting the polyester monofilament bundle for artificial hair of the present invention has a maximum opening length of 2 μm or more on the surface.
The concave portion of 0 μm or less is 0.1 μm per 100 square μm of the yarn surface area.
It is essential that there be one to ten. The number of concave portions present on the yarn surface is 0.1% per 100 square μm of the yarn surface area.
The maximum length of the opening of the recess is 2 μm
If it is smaller, the matting effect becomes insufficient and the object of the present invention cannot be achieved. Also, the maximum length of the opening of the recess is 30 μm.
If it is larger than m, the roughness of the surface becomes visible to the naked eye, and furthermore, the physical properties of the yarn deteriorate, which is not preferable for the purpose of the present invention. ◎ On the other hand, even if the maximum length of the opening of the concave portion present on the yarn surface is in the range of 2 μm or more and 30 μm or less, if the number of the concave portions is less than 0.1 per 100 square μm of the yarn surface area, the matting effect is not sufficient. And the object of the present invention cannot be achieved. On the other hand, if the number of the concave portions is more than 10 per 100 square μm of the yarn surface area, the physical properties of the yarn are deteriorated, and it cannot be preferably used as artificial hair. Further, a concave portion having a maximum opening length of 10 μm or more is formed on the surface of the yarn.
The presence of 0.01 or more per square μm is preferable because the matting effect becomes more remarkable.

[0006] The resulting recesses in the polyester monofilament surface may be the one obtained by forming in any way, such as polyethylene terephthalate (hereinafter PET hereinafter) or polybutylene terephthalate (hereinafter, referred to as PBT) and melt spinning the polyester chips such Although a concave portion can be formed by colliding inorganic particles or the like with the surface of the filament, the operation and control are complicated. Prior to or during the polycondensation reaction of the polyester more efficiently, by a known method such as adding a slurry in which inert particles are dispersed in a glycol component such as ethylene glycol or 1,4-butanediol and performing polycondensation. Obtained. After melt-spinning and stretching polyester chips such as PET and PBT containing 0.1% by weight or more and 10% by weight or less of inert particles having an average particle diameter of 1 μm or more and 10 μm or less, the filaments are converted to an alkaline liquid. In this case, it can be obtained by performing processing in the following (hereinafter referred to as N processing). The N treatment is usually carried out by immersing the filament in an aqueous solution of 1% to 25% by weight of NaOH and treating at 60 ° C. to 100 ° C. for several minutes to several tens minutes to reduce the weight. N at this time
The weight reduction of the filament by the treatment is suitably 1 to 12% by weight based on the filament weight before the N treatment. The average particle size of the inert particles contained in the polyester monofilament having a concave portion on the surface of the present invention is measured using CAPA-500 manufactured by HORIBA, Ltd. The content of the inert particles is preferably 0.1% by weight or more and 10% by weight or less from the viewpoint of matting effect after N treatment and physical properties as a filament. Further, the average particle size is preferably 1 μm or more and 10 μm or less from the viewpoint of the matting effect after the N treatment and the physical properties as a filament. The inert particles contained in the polyester monofilament having a concave portion on the surface of the present invention may be either organic particles or inorganic particles, for example, calcium carbonate,
Oxides such as silicon oxide, titanium oxide and aluminum oxide, calcium phosphate, calcium hydrogen monophosphate, calcium dihydrogen phosphate, potassium phosphate, phosphates such as potassium monohydrogen phosphate, potassium dihydrogen phosphate, antimony phosphate, barium sulfate, and sulfuric acid Sulfates such as calcium, cross-linked polystyrene and the like can be mentioned. In particular, cohesive particles or spherical monodisperse particles in which fine particles mainly composed of silicon oxide and having a primary particle size of several tens to several hundreds of nm are aggregated. Is preferred from the viewpoints of ease of handling and coloring properties of the artificial hair comprising the filament. The use of cohesive silicon oxide particles makes it possible to form concavities of various shapes on the surface of the filament, and the dye penetrates into the particles present in the filament during dyeing. Can prevent the so-called whitening. On the other hand, when spherical monodisperse silicon oxide particles are used, the shape and size of the concave portions on the surface become relatively uniform, and therefore, by selecting the particles, a matting effect according to the purpose can be exhibited. Furthermore, cohesive silicon oxide particles and monodisperse silicon oxide particles can be used properly or in combination. In addition, two or more kinds of the above-described various particles can be used in appropriate combination. The polyester monofilament having a concave portion on the surface according to the present invention can be used as it is as artificial hair, but if necessary, a dyed dye can be used. In addition, the dyeing can be performed after forming the bundle. As the dye for dyeing the polyester monofilament having a concave portion on the surface of the present invention, a disperse dye can be used, but a dye having a light fastness of class 5 or higher is preferable since the artificial hair used is less likely to be discolored or faded. Also,
For dyeing, a known dye carrier may be used in combination, but high-pressure dyeing that does not require a dye carrier is preferred. Further, carbon black or various pigments may be added to the polyester monofilament before dyeing. In this case, not only the dye at the time of dyeing can be saved, but also it is not necessary to perform dyeing depending on the application, which is preferable. Things.

The polyester monofilament having projections on the surface constituting the polyester monofilament bundle for artificial hair of the present invention has surface projections having a height from the yarn surface of 0.5 μm or more and 8 μm or less having a yarn surface area of 1 μm or more. It is essential to have 10 ³ or more and 10 ⁵ or less per square millimeter.

The height and the number of surface protrusions per unit area of the surface of the polyester monofilament having protrusions on the surface of the present invention are measured using ESM-3200 and PMS-1 manufactured by ELIONIX.

Even if the number of surface projections is not less than 10 ³ and not more than 10 ⁵ per square millimeter of yarn surface area, if the projection height of the yarn surface is less than 0.5 μm, the luster is strong, and the surface of the bundle has a high luster. Monofilaments tend to be noticeable,
The object of the present invention cannot be achieved. Similarly, the projection height is 8μ.
If it exceeds m, the gloss will be too much lost, and when a bundle is obtained, the gloss of an appropriate human hair tone will not be exhibited, so that the object of the present invention cannot be achieved.

On the other hand, the height of surface protrusions on the yarn surface is 0.5 μm.
If the number of surface protrusions per square millimeter of yarn surface area is less than 10 ³ , the luster is strong even if the number of surface protrusions per square millimeter of yarn is less than 8 μm, and the presence of the monofilament tends to be conspicuous in the bundle. You cannot achieve your goal. On the other hand, if the number of the monofilaments is more than 10 ^{5, the} monofilament has low strength and elongation, which is not preferable. Further, among the surface projections, when the surface projections having a height of 1 μm or more are 50 or more per square millimeter of the yarn surface area and the surface projections having the height of 2 μm or more are 10 or more per square millimeter of the yarn surface area, the luster is further improved. It is preferable because it gives hair tone.

[0011] projections of the polyester monofilament surface may be the one obtained by forming in any way, for example, PET or polyester chips melt-spun onto the surface of the obtained filaments with projections forming agents such as PBT, granules, etc. Although they may be in contact with or fixed to each other, the operation becomes complicated. Prior to or during the polycondensation reaction of the polyester more efficiently, by a known method such as adding a slurry in which inert particles are dispersed in a glycol component such as ethylene glycol or 1,4-butanediol and performing polycondensation. Obtained. Obtained by melt-spinning and stretching polyester chips such as polyethylene terephthalate and polybutylene terephthalate containing 0.1% by weight or more and 10% by weight or less of inert particles having an average particle size of 1 μm or more and 10 μm or less by a conventional method. Can be. The average particle diameter of the inert particles at which the polyester monofilaments contains that the front surface has a protrusion is measured using a CAPA-500 in manufactured by HORIBA, Ltd.. The content of the inert particles is preferably 0.1% by weight or more and 10% by weight or less from the viewpoint of matting effect and physical properties as a monofilament. The average particle size is preferably 1 μm or more and 10 μm or less from the viewpoint of matting effect and physical properties as a filament.

[0012] The inert particles where the contained the polyester monofilament having a protrusion on the front surface, often organic particles, either inorganic particles, such as calcium carbonate,
Oxides such as silicon oxide, titanium oxide and aluminum oxide, calcium phosphate, calcium hydrogen phosphate, calcium dihydrogen phosphate, potassium phosphate, phosphates such as potassium hydrogen phosphate and potassium dihydrogen phosphate, barium sulfate, calcium sulfate, etc. Sulfate, cross-linked polystyrene and the like can be mentioned, and in particular, cohesive particles or spherical monodisperse particles in which fine particles mainly composed of silicon oxide and having a primary particle size of several tens to several hundreds of nm are easily handled. It is preferable from the viewpoint of the color developing property of the artificial hair made of the filament. The use of cohesive silicon oxide particles allows the formation of projections of various shapes mixed on the surface of the filament, and furthermore, the dye penetrates into the inside of the particles during dyeing, preventing so-called whitening of artificial hair. be able to. On the other hand, when spherical monodisperse silicon oxide particles are used, the height of the surface projections becomes relatively uniform, so that the matting effect according to the purpose can be exhibited by selecting the particles. Furthermore, cohesive silicon oxide particles and monodisperse silicon oxide particles can be used properly or in combination. In addition, two or more kinds of the above-described various particles can be used in appropriate combination.

[0013] The polyester monofilament having a protrusion on the front surface is intact can be used as part of the artificial hair it can be used after staining treatment as required. In addition, the dyeing can be performed after forming the bundle. As the dye for dyeing the polyester monofilament having protrusions on the surface of the present invention, a disperse dye can be used, but a dye having a light fastness of 5 or more is preferable because the artificial hair used is less likely to change or fade. For dyeing, a known dye carrier may be used in combination, but high-pressure dyeing that does not require a dye carrier is preferred. Also,
Carbon black or various pigments may be added to the polyester monofilament before dyeing. In this case, not only the dye at the time of dyeing can be saved, but also it is preferable that dyeing is not necessary depending on the application. is there.

In the bundle of polyester monofilaments for artificial hair of the present invention, the yarn surface has 0.1 to 10 concave portions having a diameter of 2 μm or more and 30 μm or less in the longitudinal direction of the yarn per 100 square μm of the yarn surface area. If the blending amount of the polyester monofilament is less than 5 parts, the bundle exhibits a rather strong light reflection, which is not preferable for the purpose of the present invention. On the other hand, if the blending amount of the polyester monofilament having a concave portion on the surface is more than 95 parts, it becomes unsuitable for the purpose of the present invention because it becomes a moderately glossy bundle of human hair. On the other hand, the artificial hair polyester monofilament bundle of in the present invention, having the 0.5μm or more height from the yarn surface, the surface protrusions is 8μm or less thread surface area per square millimeter 10 ³ or more, 10 ⁵ or less If the blending amount with the polyester monofilament is more than 95 parts by weight, the bundle exhibits a rather strong light reflection, which is not preferable for the purpose of the present invention. On the other hand, if the blending amount of the polyester monofilaments having surface projections is less than 5 parts, a lustrous bundle having an appropriate human hair tone is obtained, which is not preferable for the purpose of the present invention.

The monofilament constituting the bundle of the present invention may have any thread cross-sectional shape, for example, a circle, an ellipse, a triangle, T, Y, H, +, 5, 6, 7, 8, etc. , A square, a rectangle, a rhombus, a cocoon shape, a horseshoe shape, and the like, and these shapes may be partially modified. In addition, these monofilaments having various cross-sectional shapes can be appropriately combined and used.

The thickness of the polyester monofilament constituting the bundle of the present invention is 20 μm or more and 120 μm or more.
It is desirable that the particle size is not more than μm from the viewpoint of exhibiting a natural effect. More preferably 25 μm or more, 100 μm
It is as follows. When the bundle of the present invention is used as a material for a hair band, the bundle may be a bundle of monofilaments having a single thickness. However, when the bundle is used as a material such as a wig or a hair wig or a hair, 25 μm is used.
As described above, a monofilament having a thickness of 100 μm or less is appropriately combined and mixed to form a bundle.

The polyester monofilament constituting the bundle may contain a known ultraviolet absorber for the purpose of preventing the discoloration and fading of the artificial hair being used. As the ultraviolet absorber, for example, 2,2-methylenebis [4- (1,1,3,3-tetramethylbutyl)
-6- (2H-benzotriazol-2-yl) phenol, 2- [2-hydroxy-3,5-bis (α, α-
Dimethylbenzyl) phenyl] -2H-benzotriazole, 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- [3,5-bis (2,2-dimethylpropyl) -2-hydroxyphenyl] benzotriazole 2- (3-tert-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5-tert-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole,
A benzotriazole-based ultraviolet absorber such as-[2-hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole and 2-hydroxy-4- (methacryloyloxyethoxy) benzophenone 30 to 50 Mole% and methyl methacrylate 70-3
Random copolymer with 0 mol%, 2,4-dihydroxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, 2-hydroxy-4- (β-hydroxyethoxy) -benzophenone, bis (5-benzoyl- Benzophenone-based ultraviolet absorbers such as 4-hydroxy-2-methoxyphenyl) methane and iron oxide fine particles can be exemplified. Among these ultraviolet absorbers, bis (5-benzoyl-4-hydroxy-2-methoxyphenyl) methane and 2,2-methylenebis [4
-(1,1,3,3-tetramethylbutyl) -6- (2
H-benzotriazol-2-yl) phenol and 2- [2-hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole and iron oxide fine particles are added to the molten polyester. -A monofilament having good heat resistance at the time of mixing and having high light resistance can be obtained, and thus can be preferably used. The random copolymer of 30 to 50 mol% of 2-hydroxy-4- (methacryloyloxyethoxy) benzophenone and 70 to 30 mol% of methyl methacrylate has a high molecular weight, has little bleed-out from polyester monofilament, and has stable light resistance. Can be preferably used. Further, two or more of these various ultraviolet absorbers may be used in combination.

The polyester monofilament constituting the bundle contains a known organic or inorganic flame retardant such as phosphorus-based, halogen-based or antimony trioxide in order to protect the human body from the danger of fire during use. Is also good. Further, the polyester monofilament constituting the bundle is clinged or entangled by the electrification of the filament,
Alternatively, for the purpose of preventing dust from adhering, a material using a modified polyester containing an antistatic agent or a material having a surface provided with an antistatic agent may be used.

The bundle of the present invention is, for example, 20 to 100
The above-mentioned operation of plying 5 to 95 parts of the polyester monofilament having a concave portion on the surface and 95 to 5 parts of the polyester monofilament having a projection on the surface into a bundle of bundles is repeated. It can be manufactured by performing.

Further, in addition to the polyester monofilament having a concave portion on the surface and the polyester monofilament having a projection on the surface as the fibers constituting the polyester monofilament bundle for artificial hair of the present invention,
If necessary, human hair, polyester filaments having fine irregularities on the surface, modacrylic filaments, polyamide filaments having irregularities of spherulites, vinyl chloride filaments and the like can be used in combination.

Thus, the polyester monofilament bundle for artificial hair comprising the polyester monofilament having concave portions on the surface and the polyester monofilament having surface projections according to the present invention has a suitable surface gloss and a suitable matting property for human hair. For the purpose of supplementing hair, such as wigs, hair wigs, false hair, or hair bands, or fiber materials that constitute all or part of various objects attached to the hair or head for the purpose of fashion, etc. It can be suitably used in various fields where a sense of stickiness is disliked.

[0022]

The present invention will be described in more detail with reference to the following examples. In addition, the evaluation of the matting property in the examples was carried out by visually judging the reflection gloss of a bundle of a bundle of 1,000 monofilaments at an incident angle of sunlight of 5 to 45 degrees near an indoor window exposed to direct sunlight, and in the fiber axis direction. Those with relatively strong reflective gloss and those without the surface gloss of human hair are considered unsuitable as artificial hair, and have the appropriate surface gloss of human hair and moderate matteness. Those shown are those judged to be suitable for artificial hair.

Example 1 An intrinsic viscosity (measured at 25 ° C. in a mixed solvent of phenol and tetrachloroethane 1: 1) containing 2.5% by weight of cohesive silicon oxide particles having an average particle size of 2.36 μm was 0.67. The polyethylene terephthalate chip was dried at 160 ° C. under vacuum for 8 hours. The chips were spun at 290 ° C. by an extruder-type kneader, a metering gear pump and a spinning machine having 50 mesh glass beads and a filtration layer consisting of a 150 mesh wire mesh, and a spinneret having 30 holes of 0.3 mm in diameter. This was further melt-spun, then stretched to a total of 5.0 times, and further subjected to a relaxation treatment of 8%, followed by winding. On the single yarn surface of the obtained polyester filament, there are about 18,000 surface protrusions having a height of 0.5 μm or more and 8 μm or less per 1 mm 2 of the yarn surface area,
The single yarn strength is 3.8 g / denier, and the single yarn diameter is 60μ.
m.

Next, half of the filament is kept as it is, and the other half of the filament is treated with N (N
aOH 50 g / ■ aqueous solution, 98 ° C, 30 minutes) to obtain a polyester filament having a weight reduction rate of 7 wt% by N treatment. On the surface of the single yarn of the obtained polyester filament, the diameter of the opening in the longitudinal direction is 2 μm or more and 30 μm or more.
There were 1.1 of the following recesses per 100 square μm of the yarn surface area. Among the recesses, the diameter of the opening in the longitudinal direction is 1
Those having a size of 0 μm or more have a yarn surface area of 0.1 μm per 100 square μm.
There were 03. The single yarn strength was 3.5 g / denier, and the single yarn diameter was 58 μm. Using a high-pressure Smith dyeing machine,
Dyeing was carried out with the following dye solution at a bath ratio of 20: 1 at 130 ° C. for 60 minutes, followed by hydrosulfite 1.5 g / ■, caustic soda 1 g / ■, and amyrazine 1 g / １.
Reduction washing was performed at 80 ° C. for 20 minutes in an aqueous solution containing (1) (bath ratio 20: 1) to obtain a dyed filament.
In addition, filaments having projections on the surface which had been stored without N treatment were dyed in the same manner to obtain dyed filaments.

[Dye Solution] Sumikaron Brown 2.5% owf Miketon Polyester Black 0.3% owf Dianix Fast Yellow 1.5% owf Dianix Fast Dark Green 1.0% cut on the surface, cut into 30% length 500 dyed monofilaments having concave portions were spread almost uniformly to a width of 10 cm, and 500 dyed monofilaments having projections on the surface, which were similarly cut to a length of 30 cm, were superposed almost uniformly. Next, the monofilaments were divided into four equal parts in the width direction, and the monofilaments were overlapped so as not to be exchanged. This monofilament bundle is divided into two equal parts, one of which is spread almost uniformly to a width of 10 cm, and the other is superimposed almost uniformly. The overlapping of the monofilaments is divided into four equal parts in the width direction so that the upper and lower parts are not interchanged. To one another. This operation is repeated 20 times in total,
Dyed monofilament 500 with concave parts on the surface
Book and dyed monofilament with protrusions on the surface 5
Thus, a bundle obtained by blending with 100 pieces was obtained. When the matting property of this bundle was evaluated, it had a suitable surface gloss of human hair and an appropriate matting property and was suitable for artificial hair.

Examples 2 and 3 The number of dyed monofilaments having concave portions on the surface was changed to 70, the number of dyed monofilaments having protrusions on the surface was changed to 930 (Example 2), and the concave portions were formed on the surface. Matting properties of a bundle obtained in the same manner as in Example, except that the number of dyed monofilaments having odor was changed to 930 and the number of dyed monofilaments having protrusions on the surface was changed to 70 (Example 3) As a result, each of them had suitable surface gloss of human hair tone and moderate matting properties and was suitable for artificial hair.

Comparative Example 1 A bundle obtained in the same manner as in the Example except that the number of dyed monofilaments having concave portions on the surface was changed to 30 and the number of dyed monofilaments having protrusions on the surface was changed to 970. When the matting properties of the body were evaluated, it showed relatively strong reflective gloss in the fiber axis direction and was unsuitable as artificial hair.

Comparative Example 2 A bundle obtained in the same manner as in the Example except that the number of dyed monofilaments having concave portions on the surface was changed to 970 and the number of dyed monofilaments having protrusions on the surface was changed to 30. When the mattability of the body was evaluated, it lacked the appropriate gloss of human hair and was unsuitable as artificial hair.

[0029]

The polyester monofilament bundle for artificial hair of the present invention has a maximum opening length of 2 μm on the yarn surface.
m and 30 μm or less in the yarn surface area 100 square μm
5 to 95 polyester monofilaments having 0.1 to 10 pieces per piece and a height of 0.5 μm from the yarn surface
It is a blend of 95 to ⁵ parts of polyester monofilaments having 10 ³ or more and 10 ⁵ or less surface protrusions of not less than m and not more than 8 μm per square millimeter of yarn surface area, so that the human hair has an appropriate surface gloss. A fiber that has a moderate matting property and composes all or a part of various objects attached to the hair or head for the purpose of supplementing hair such as a wig, hair wig, false hair, or hair band, or for the purpose of fashion, etc. It is suitable as a material.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI D01F 6/92 301 D01F 6/92 301Q 306 306B // D06M 11/38 D06M 5/02 D (58) Field surveyed (Int. Cl. ⁷ , DB name) D01F 1/00-6/94 A41G 3/00 A61L 27/00

Claims (1)

(57) [Claims] 1. A monofilament having a concave portion on the surface of a yarn, comprising 5 to 95 parts of polyester monofilaments having 0.1 to 10 concave portions having a maximum length of 2 μm or more and 30 μm or less per 100 square μm of the yarn surface area. The number of surface protrusions having a height of 0.5 μm or more and 8 μm or less is 10 ³ or more per square millimeter of the yarn surface area.
0 Polyester monofilament 95 or less having ⁵ or less
A polyester monofilament bundle for artificial hair comprising 5 parts by weight.