JPH05140807A - Artificial hair - Google Patents

Abstract

(57) [Summary] [Structure] Concave recesses with a maximum opening length of 2 μm or more and 30 μm or less are used per filament surface area of 100 μm 2.
Artificial hair consisting of 10 to 10 polyester filaments. [Effect] Since the artificial hair is made of polyester filament having 0.1 to 10 recesses with an opening of 2 μm or more and 30 μm or less per 100 μm of the filament surface area on the filament surface, it has good matting properties. It is suitable as a fibrous material having a wig, a hair wig, false hair, a hair band, etc., which is attached to the hair part or the head for the purpose of supplementing the hair or for fashioning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial hair comprising polyester filaments having concave portions on the surface, which shows good matting property with suppressed surface gloss.

[0002]

2. Description of the Related Art In recent years, as a material for artificial hair used for wigs, hair wigs, false hair, hair bands, etc., fibers containing saturated polyester as a main component, such as polyethylene terephthalate, have excellent tensile strength and heat resistance. It has come to be widely used in terms of good set retention. When using fibers containing saturated polyester as the main component as artificial hair, in addition to properties such as easy setting, set retention, combability, and little discoloration due to light, it also has an appropriate matting property similar to human hair. Although a color is required, the polyester fiber produced by a conventional method as it is has a flat yarn surface and a high light refractive index, and therefore has a strong surface gloss and cannot be applied to artificial hair. In order to improve this point, a matting technique for the surface of polyester fiber has been conventionally proposed. For example, a method is known in which a large number of scratches are generated 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 drawback that the strength of the fiber is lowered due to scratches generated on the surface of the fiber. Further, JP-A-63-12716 discloses a polyester for artificial hair in which a polyester fiber containing fine particles containing silicon oxide as a main component is treated with an alkaline aqueous solution to form specific fine irregularities on the fiber surface. Fibers and methods of making the same are disclosed. However, the fibers obtained by this method are inferior in the matte state because the surface irregularities are fine and uniform, and it is recognized that they show strong light reflection when receiving light from an oblique direction. ,
Its use as artificial hair was restricted.

[0003]

DISCLOSURE OF THE INVENTION The present invention is to provide an artificial hair which is free from the above-mentioned various problems and which comprises polyester filaments having a suppressed surface gloss and excellent matting properties.

[0004]

The object of the present invention described above is, in a monofilament having recesses on the surface thereof, 0.1 recesses with a maximum opening length of 2 μm or more and 30 μm or less per 100 square μm of the yarn surface area. This can be achieved with artificial hair consisting of 10 polyester filaments. Hereinafter, the present invention will be described in detail. The artificial hair of the present invention refers to a fiber material constituting all or a part of various objects to be attached to the hair part or the head for the purpose of supplementing the hair such as a wig, a hair wig, false hair or a hair band, or for the purpose of fashioning. It is truly awesome. The polyester of the polyester filament constituting the artificial hair of the present invention is preferably a polyester having terephthalic acid as a main difunctional carboxylic acid and ethylene glycol or 1,4-butanediol as a main glycol component. Some or all of 2,6-naphthalenedicarboxylic acid, 4,4 '
-Dicarboxyphenoxymethane, isophthalic acid, or the like, or ethylene glycol partially or wholly by diethylene glycol, propylene glycol, EO adduct of bisphenol-A, or the like may be used. Further, a trifunctional compound such as trimesic acid, trimellitic acid, boric acid, glycerin and trimethylolpropane may be copolymerized as long as it is a small amount. For the purpose of modification, the polyester may be another thermoplastic synthetic resin, for example, polyamides such as nylon 6, nylon 6.6, polyolefins such as polyethylene and polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, ethylene. 0.5% by weight of fluoropolymers such as tetrafluoroethylene copolymer
It is also possible to use a blend in the range of 50 wt%.

The maximum length and the number of the openings of the concave portions existing on the surface of the filament of the present invention per unit area are determined by using an S-4000 field emission scanning electron microscope manufactured by Hitachi, Ltd. It is measured from a photograph obtained by taking 10 fields of view of the surface at a magnification of 500 times.
On the surface of the polyester filament that constitutes the artificial hair of the present invention, there are 0.1 to 10 recesses having a maximum opening length (diameter in the longitudinal direction) of 2 μm or more and 30 μm or less per 100 μm of the yarn surface area. Is essential. Even if the number of recesses present on the yarn surface is 0.1 to 10 per 100 μm of the surface area of the yarn, if the maximum length of the opening of the recess is less than 2 μm, the matting effect becomes insufficient. However, the object of the present invention cannot be achieved. When the maximum length of the opening of the recess is larger than 30 μm, the surface roughness becomes visible to the naked eye, and further the physical properties of the yarn are deteriorated, 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 recess existing on the yarn surface is in the range of 2 μm or more and 30 μm or less, the matting effect is insufficient if the number of the recess is less than 0.1 per 100 μm of the yarn surface area. Therefore, the object of the present invention cannot be achieved. If the number of recesses is more than 10 per 100 μm of the surface area of the yarn, the physical properties of the yarn are deteriorated and it cannot be used preferably as artificial hair. Here, it is preferable that 0.01 or more concave portions having a maximum opening length of 10 μm or more are present on the filament surface per 100 square μm of the yarn surface area because the matting effect becomes more remarkable.

The recesses on the surface of the filament of the present invention may be formed by any method, for example, obtained by melt spinning polyester chips such as polyethylene terephthalate (hereinafter referred to as PET) and polybutylene terephthalate (hereinafter referred to as PBT). Further, it is possible to collide inorganic particles or the like with the surface of the filament to form the concave portion, but the operation and control become complicated. More efficiently, 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 before or during the polycondensation reaction of polyester and polycondensing The average particle size obtained in 1. is 1 μm or more,
Inert particles of 10 μm or less, 0.1 wt% or more, 10
It can be obtained by melt spinning and stretching a polyester chip such as PET or PBT containing not more than wt% by a conventional method, and then treating the filament in an alkaline liquid (hereinafter referred to as N treatment). The N treatment is usually carried out by immersing the filament in a 1 wt% to 25 wt% NaOH aqueous solution and treating it at 60 ° C. to 100 ° C. for several minutes to several tens of minutes to reduce the weight. At this time, the weight reduction of the filament by the N treatment is appropriately 1 to 12% by weight with respect to the weight of the filament before the N treatment. In this case, the average particle diameter of the inert particles contained in the polyester 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 the matting effect after N treatment and the physical properties of the filament. The average particle size is preferably 1 μm or more and 10 μm or less from the viewpoint of the matting effect after N treatment and the physical properties of the filament.

The inert particles contained in the polyester may be organic particles or inorganic particles, for example, oxides of calcium carbonate, silicon oxide, titanium oxide, aluminum oxide, calcium phosphate, calcium monohydrogen phosphate, phosphoric acid. Phosphates such as calcium dihydrogen, potassium phosphate, potassium monohydrogen phosphate, potassium dihydrogen phosphate, antimony phosphate, and sulfates such as barium sulfate and calcium sulfate,
Crosslinked polystyrene and the like can be mentioned, but particularly 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 nm are aggregated and the filament is easy to handle. It is preferable from the viewpoint of the color development of the artificial hair made of When cohesive silicon oxide particles are used, concave portions having various shapes can be formed on the surface of the filament, and the dye also penetrates into the particles present in the filament at the time of dyeing. It is possible to prevent so-called "whitening". On the other hand, when spherical monodisperse silicon oxide particles are used, the shape and size of the recesses on the surface become relatively uniform, and therefore, by selecting the particles, a matting effect suitable for the purpose can be exhibited. Further, the aggregating silicon oxide particles and the monodisperse silicon oxide particles can be used properly or in combination. Further, two or more kinds of the various particles described above can be appropriately combined and used.

The filament may have any cross-sectional shape, for example, round, elliptical, triangular, T, Y, H, +,
Examples include multi-lobed shapes such as 5 leaves, 6 leaves, 7 leaves, and 8 leaves, squares, rectangles, rhombuses, cocoon-shaped, horseshoe-shaped, and the like. Good.
Further, in use, filaments having various cross-sectional shapes can be appropriately combined and used.

The thickness of one polyester filament constituting the artificial hair of the present invention is 20 μm or more, 10
It is preferably 0 μm or less from the viewpoint of exhibiting a natural-like effect. More preferably 25 μm or more, 100 μ
m or less.

When the artificial hair of the present invention is used as a hair band, filaments having a single denier may be bundled and used, but when it is used as a wig, a hair wig, or a hair attachment, the thickness is in the range of 25 μm to 100 μm or less. It is preferable to appropriately combine and mix the filaments of Sasano.

The polyester filament having concave portions of the present invention can be used as it is as artificial hair, but if necessary, it is subjected to a dyeing treatment. Although disperse dyes can be used as the dye, those having a light fastness of grade 5 or higher are preferred because the artificial hair during use is less discolored or discolored. Further, for dyeing, a known dyeing carrier agent may be used in combination, but high pressure dyeing which does not require a dyeing carrier agent is preferable. In addition, carbon black or various pigments may be added to the polyester filament before dyeing. In this case, not only the dye at the time of dyeing can be saved, but also dyeing does not have to be performed depending on the use, which is preferable. It is a thing.

Further, the artificial hair may contain a known ultraviolet absorber for the purpose of preventing discoloration or discoloration of the artificial hair during use. Examples of the ultraviolet absorber include 2,2-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazole-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-tertiary Butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5-tert-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- [2-hydroxy-3, A benzotriazole-based ultraviolet absorber such as 5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, and 30 to 50 mol% of 2-hydroxy-4- (methacryloyloxyethoxy) benzophenone and methyl methacrylate 70 ~ 30 mol% random copolymer, 2,4-dihydroxy Benzophenone, 2,2 ',
Benzophenone-based UV absorbers such as 4,4′-tetrahydroxybenzophenone, 2-hydroxy-4- (β-hydroxyethoxy) -benzophenone and bis (5-benzoyl-4-hydroxy-2-methoxyphenyl) methane, and iron oxide Examples thereof include fine particles.
Among these UV absorbers, bis (5-benzoyl-4)
-Hydroxy-2-methoxyphenyl) methane and 2,2-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazole-2
-Yl) phenol and 2- [2-hydroxy-3,
5-bis (α, α-dimethylbenzyl) phenyl] -2
Since H-benzotriazole, iron oxide fine particles and the like have good heat resistance and high light resistance when added to and mixed with molten polyester, they can be preferably used. A random copolymer of 2-hydroxy-4- (methacryloyloxyethoxy) benzophenone of 30 to 50 mol% and methyl methacrylate of 70 to 30 mol% has a high molecular weight, has little bleed out from the polyester filament, and has stable light resistance. Can be preferably used. Further, two or more of these various ultraviolet absorbers may be used in combination.

The artificial hair may contain a known organic or inorganic flame retardant such as phosphorus-based, halogen-based, antimony trioxide, etc. in order to protect the human body from the danger of fire during use. The artificial hair may be modified with polyester constituting the hair or provided with an antistatic agent on the surface for the purpose of preventing entanglement or entanglement due to electrification of filaments or adhesion of dust.

Thus, since the artificial hair comprising the polyester filaments having surface protrusions of the present invention has suppressed surface gloss, the purpose of supplementing hair such as a wig, a hair wig, false hair or a hair band,
Alternatively, it can be suitably used in various fields where the feeling of shining due to light is disliked, such as a fiber material forming all or a part of various things to be worn on the hair part or the head for fashioning or the like.

[0015]

EXAMPLES The present invention will be described in more detail with reference to the following examples. In addition, in the evaluation of matting properties in the examples, 5000 filaments were bundled and visually judged at an incident angle of 5 to 45 degrees of sunlight at an indoor window exposed to direct sunlight. Artificial hair is one that has a strong reflective gloss linearly in the fiber axis direction and is unsuitable as artificial hair, and one that has a dull, dry feel and that has good matting properties similar to human hair. Was determined to be suitable.

Example 1 Intrinsic viscosity (at a temperature of 25 ° C. in a mixed solvent of phenol and tetrachloroethane 1: 1) containing 2.0% by weight of agglomerate silicon oxide particles having an average particle size of 2.36 μm obtained by a conventional method. Measurement) 0.
67 polyethylene terephthalate chips under vacuum 16
It was dried at 0 ° C. for 8 hours. Using a spinning machine having an extruder-type kneader, a measuring gear pump, and a filter layer composed of 50-mesh glass beads and 150-mesh wire mesh at 290 ° C., the chips were spun into holes with a diameter of 0.3 mm to 3 mm.
It was melt-spun from a spinneret having 0 holes, then stretched to a total of 5.0 times, further subjected to a relaxation treatment of 8%, and then wound. Next, N treatment (NaOH 50 g / l aqueous solution, 98 ° C., 30 minutes) was added to this monofilament to obtain a polyester filament having a weight reduction rate of 7 wt% by N treatment. On the yarn surface of the obtained polyester filament, the maximum length of the opening is 2 μm or more and 30 μm or more.
There were 0.6 recesses of m or less per 100 μm of the surface area of the yarn. Among the recesses, 0.02 of the openings having a diameter in the longitudinal direction of 10 μm or more were present per 100 μm of the surface area of the yarn. The yarn strength was 3.8 g / denier and the yarn diameter was 58 μm. This filament was dyed using a high pressure Smith dyeing machine with the following dye solution under the conditions of a bath ratio of 20: 1 and 130 ° C. for 60 minutes, and then hydrosulfite 1.5 g / l and caustic soda 1 g. / L, amylazine 1 g / l in an aqueous solution (bath ratio 20: 1) at 80 ° C for 20 minutes for reduction cleaning,
A dyed filament was obtained. When the matting property of this filament was evaluated, it showed a good matting property similar to the hair of a person who has a dull and dry feeling, and was suitable as an artificial hair. [Dye liquid] Sumikaron Brown 2.5% owf Miketon Polyester Black 0.3% owf Dianix Fast Yellow 1.5% owf Dianix Fast Dark Green 1.0% owf Oxidized chips of basic examples Polyethylene terephthalate A polyester filament was obtained in the same manner as in Example 1 except that the average particle size was changed to 1.16 μm. On the surface of this filament, there were 0.5 recesses having a maximum opening length of 2 μm or more and 30 μm or less per 100 μm of the yarn surface area. Among the concave portions, 0.015 pieces having a maximum opening length of 10 μm or more were present per 100 square meters of the yarn surface area. The yarn strength is 3.6g.
/ Denier, the yarn diameter was 58 μm. When the mattness of this filament was evaluated, it showed good mattness similar to the hair of a person with a dull, dry feeling,
It was suitable as artificial hair.

Example 3 A polyester filament was obtained in the same manner as in Example 1 except that the content of aggregating silicon oxide particles in the polyethylene terephthalate chip was changed to 5.0% by weight. On this filament surface, the maximum length of the opening is 2 μm or more,
There were 5.0 recesses of 30 μm or less per 100 μm of the surface area of the yarn. Among the recessed portions, the number of openings having a maximum length of 10 μm or more was 0.05 per 100 μm 2 of the yarn surface area. When the matting property of this filament was evaluated, it showed a better matting property similar to that of human hair than the filament obtained in Example 1 described above, and it was suitable as an artificial hair.

Comparative Example 1 A filament was obtained in the same manner as in Example 1 except that the polyethylene terephthalate chips did not contain agglomerated silicon oxide particles. No recesses with a maximum opening length of 2 μm or more were observed on the surface of this filament, and fine recesses smaller than 2 μm were present. When the matteness was evaluated, it showed a linear reflective gloss, and artificial hair Was not applicable to.

Comparative Example 2 A filament was obtained in the same manner as in Example 1 except that the content of the cohesive silicon oxide particles in the polyethylene terephthalate chip was changed to 0.05% by weight. On the filament surface, there were about 0.05 recesses having a maximum opening length of 2 μm or more and 30 μm or less per 100 square μm of the yarn surface area, but the matting property is insufficient and it cannot be applied to artificial hair. It was a thing.

Comparative Example 3 Example 1 except that the content of agglomerate silicon oxide particles in the polyethylene terephthalate chip was changed to 15% by weight.
A filament was obtained in the same manner as in. On the surface of this filament, there were about 12 concave portions having a maximum opening length of 2 μm or more and 30 μm or less per 100 square meters of yarn surface area, but the filament yarn strength was as low as 1.8 g / denier, and artificial hair was Was not preferable.

Comparative Example 4 A filament obtained in the same manner as in Example 1 except that the average particle size of the cohesive silicon oxide particles in the polyethylene terephthalate chip was changed to 0.5 μm had the largest opening. The surface area of the thread is 1 when the length is 2 μm or more and 30 μm or less.
There were about 0.02 per 100 μm 2, but the matting property was insufficient and it could not be applied to artificial hair.

[0022]

EFFECTS OF THE INVENTION The artificial hair made of the polyester filament of the present invention has 0.1 to 10 concave portions having a maximum opening length of 2 μm or more and 30 μm or less on the yarn surface per 100 μm of the yarn surface area. Therefore, it shows a good matte state in which the surface gloss is suppressed, and various wigs, hair wigs, false hair, hair bands, etc. are attached to the hair part or the head for the purpose of supplementing the hair or for fashioning etc. It is suitable as a fiber material constituting all or a part of an article.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location D01F 6/92 301 M 7199-3B Q 7199-3B

Claims (2)

[Claims] 1. An artificial hair comprising a filament having recesses on the yarn surface, the polyester filament having 0.1 to 10 recesses having a maximum opening length of 2 μm to 30 μm per 100 μm of the yarn surface area. 2. The artificial hair according to claim 1, which has 0.01 or more concave portions having a maximum length of 10 μm or more per 100 μm of the surface area of the yarn.