JPH08296115A - Fiber for artificial hair and fiber bundle using the same and used for decorating head - Google Patents

Abstract

PURPOSE: To obtain a fiber for the artificial hair, used for decorating a head and having a more natural luster and a soft touch. CONSTITUTION: This fiber for the artificial hair comprises an acrylic polymer containing acrylonitrile in an amount of >=30wt.%, and has the cross section having three or more projections radially projected from a central connection part and a single fiber fineness of 25-75d. The surface of the fiber has groove- like projections and depressions parallel to the direction of the fiber, and the depressions among the depressions and the projections have an average depth of 0.05-0.7μm. The 15-40 depressions exist on the surface of the fiber at an arbitrary distance of 50μm on the outer peripheral line of the fiber. The fibers are subjected to a twisting processing treatment to form fiber bundles, which are used for hair-decorating articles such as wigs, hair pieces, braids, extension hairs or doll hairs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a wig, a hair piece,
The present invention relates to a fiber for artificial hair, which is used as a head decoration for a blade, extension hair, doll hair, etc. and has a natural gloss and a soft touch, and a fiber bundle for head decoration using the same.

[0002]

2. Description of the Related Art Generally, acrylic synthetic fibers or vinyl chloride synthetic fibers are often used as fibers for wigs and hairpieces. In the case of head ornaments, a matting operation is generally performed to bring the hair closer to human hair. For example, JP-B-56-44164, JP-A-56-309, and JP-A-56-311. Et al. Adopt a method of adjusting gloss by blending acrylic fiber with a metal compound or cellulose acetate. But,
When a metal compound such as titanium dioxide or aluminum hydroxide is used, there are problems that the luster unnaturally disappears and the transparency is deteriorated, and the feeling of roughness in touch is increased. In addition, the method using cellulose acetate has a drawback that the fiber surface becomes more rugged, resulting in a fiber having a hard touch even though the gloss is natural.

Improvements have also been made from a viewpoint different from the above, and Japanese Patent Publication No. 63-58926 and Japanese Patent Publication No. 1-248686.
Japanese Patent Laid-Open Publication No. 2003-242242 discloses a method of providing continuous node-shaped irregularities in the fiber axis direction. Although these fibers were excellent in terms of gloss, they were suitable for a rigid straight style, lacked a soft feel, and were difficult to manufacture.

[0004]

Therefore, the present invention does not provide a fiber for artificial hair having a more natural luster and soft feel, which is used as a hair ornament for wigs, hairpieces, blades, extension hairs, doll hairs and the like. It is what

[0005]

Means for Solving the Problems As a result of intensive studies by the present inventors in order to achieve both a natural gloss and a soft feel in artificial hair fibers, the inventors have found that an acrylic polymer fiber surface containing 30% by weight or more of acrylonitrile is used. It was found that a fiber capable of achieving both a natural luster and a soft feel as a fiber for artificial hair can be obtained by causing specific unevenness and controlling the single yarn fineness, and completed the present invention. It was

That is, the artificial hair fiber according to claim 1 is
An artificial hair fiber made of an acrylic polymer containing 30% by weight or more of acrylonitrile, which is
It has groove-like irregularities parallel to the fiber axis direction, the depth of the concave portions in the irregularities is in the range of 0.05 to 0.7 μm on average, and 15 to 4 at an interval of 50 μm on the outer peripheral line of the fiber.
It is characterized in that there are 0 recesses and the single yarn fineness is 25 to 75 d.

Here, the outer peripheral line of the fiber means, for example, the outer peripheral line in the cross-sectional shape of the fiber shown in FIG. 1, and the depth of the concave portion means the space between the adjacent convex portions on the outer peripheral line as shown in FIG. It is the distance D from the straight line connecting the points.

The fiber for artificial hair according to claim 2 is the fiber for artificial hair according to claim 1, wherein the cross section of the fiber has three or more projecting portions radially projecting from one central connecting portion. It has a shape. As such a cross-sectional shape, for example, there is one as shown in FIGS.

The fiber according to claim 1 or 2 is
It is preferably used for head decoration of wigs, hairpieces, blades, extension hair, doll hair and the like.

Further, in claim 5, claim 1 or claim 2
The artificial hair fiber is subjected to crimping such as Giar crimp to form a substantially corrugated fiber bundle, which is used as a head ornament fiber bundle.

Further, a sixth aspect of the present invention is to provide the fiber bundle for head decoration,
It is used as a head ornament for wigs, hairpieces, braces, squeezing hair, doll hair, etc.

The polymer constituting the fiber for artificial hair of the present invention must contain at least 30% by weight of acrylonitrile, and if it is less than 30% by weight, the heat resistance of the fiber becomes poor. In addition to acrylonitrile, a vinyl-based monomer copolymerizable with acrylonitrile may be used for copolymerization. The copolymerizable vinyl monomer, vinyl chloride, vinylidene chloride, vinyl bromide, vinylidene bromide, acrylic acid ester, methacrylic acid ester, acrylamide, methacrylamide, or their mono- or dialkyl-substituted, acrylic acid, Methacrylic acid, itaconic acid, styrene sulfonic acid, methallyl sulfonic acid, methacryl oxybenzene sulfonic acid, methacryl oxypropyl sulfonic acid, or these metal salts and ammonium and amine salts, glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether, Examples include methallyl glycidyl ether. Among these, vinyl chloride and vinylidene chloride are preferred, and styrene sulfonic acid and methallyl sulfonic acid are preferably used in small amounts.

The polymer is mixed with an organic solvent such as acetone,
Dissolve in acetonitrile, dimethylformamide, etc. to prepare a spinning dope. If necessary, a stabilizer or the like which is effective in preventing coloration and light resistance may be added.

In order to obtain groove-shaped irregularities parallel to the fiber axis direction in the present invention, it can be produced by adding a rubber-like polymer such as epichlorohydrin rubber, polyvinyl acetate, ethylene-vinyl acetate copolymer and the like. Polyvinyl acetate is preferable from the viewpoint of stably obtaining the desired uneven shape. Further, as the rubber-like polymer, a polymer soluble in the solvent used in the stock solution for spinning the acrylic polymer should be selected from the viewpoint of operation. The amount of rubbery polymer added is
The amount of 0.5% by weight or more with respect to the total amount of the acrylic polymer and the rubber-like polymer can sufficiently achieve the object, but even if the amount is increased to about 1 to 5% by weight to adjust the gloss. It doesn't matter. However, 5% by weight of rubbery polymer
If added in excess, the surface roughness may become excessive depending on the type of the acrylic polymer, and the feeling such as roughening may be deteriorated, so the addition amount is preferably 0.5 to 5.0% by weight.

In the artificial hair fiber of the present invention, the depth of the recesses in the groove-shaped irregularities parallel to the fiber axis is 0.05 on average.
Although it is ~ 0.7 μm, in terms of smoothing the feel,
An average of 0.2 to 0.5 μm is preferable. The presence of the recesses reduces the contact area between the fibers or between the fibers and the hand, and provides a smooth feel. The depth of the recess is 0.0
If it is less than 5 μm, it is sticky, and if it exceeds 0.7 μm, it is greasy. Also, any 5 of the outer circumference of the fiber
15-40 recesses are required at 0 μm intervals. If the number of recesses is less than this, there is a sticky feeling, and if it is too large, there is a greasy feeling.

The single yarn fineness of the artificial hair fiber of the present invention is 25 to 75 d. When the fineness is less than 25 d, the hair is too soft and has no stiffness, and the bulkiness of the artificial hair is poor. On the other hand, if it is thicker than 75d, the rigidity of the fiber becomes strong, it is difficult to process it into a product such as a blade, and the feeling of touch becomes unnatural, so it is necessary to select an appropriate fineness. The range of 25 to 45 d is preferable in the sense that importance is attached to the feeling.

In producing the fiber of the present invention, it is desirable to use a spinning nozzle having a cross-sectional shape having three or more projecting portions radially projecting from one central connecting portion. Such a spinning nozzle is preferable. When a fiber is manufactured using, the cross-sectional shape as shown in FIGS. 3 (a) to 3 (d) can be obtained, but crimping such as Giar crimp is applied to form a substantially wavy fiber bundle. In this case, the cross-sectional shape having a smaller number of protrusions tends to be relatively bulky, and the case where there are three protrusions has the largest volume.

The crimping process referred to in the present invention is, for example, a Giar crimp system in which fibers are sandwiched between two gear-shaped rolls to continuously give a corrugated shape, or a fiber heated by steam is stuffed in a stuffing box. It refers to a method or the like for continuously pushing into a shape such as to give a corrugated shape. By these methods, the repeating unit of the peak and the valley is usually 5 to 15 pieces in a linear distance of 100 mm, and the sum of the height of the peak and the depth of the valley is usually 5 to 5.
By giving the corrugated shape of 12 mm, a fiber bundle in which the post-processability of the wig, the blade, the hair piece, etc. is significantly improved can be obtained.

The artificial hair fiber of the present invention is used for hair decoration of wigs, hairpieces, blades, extension hairs, doll hairs and the like. The crimped fiber bundles such as Gier crimp are the above-mentioned. Among the fiber bundles for headdresses, it is particularly suitable for blades, hairpieces and the like.

[0020]

【Example】

<Example 1> A copolymer resin containing 49% by weight of acrylonitrile, 50% by weight of vinyl chloride and 1% by weight of sodium styrenesulfonate was dissolved in acetone to prepare a spinning dope of 28% by weight. Polyvinyl acetate (Goshenil Y- manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) relative to 99% by weight of the resin
2) was mixed in the spinning dope to a concentration of 1.0% by weight. After thoroughly mixing, the resulting fiber was spun in a 30 wt% acetone aqueous solution, and the obtained fiber was stretched 2 times in the state where the solvent remained, then dried at 120 ° C. and then heat stretched 2.5 times. Further, relaxation heat treatment was performed at 145 ° C. The spinning nozzle used was a substantially Y-shaped cross section (equivalent to 50H × φ0.38) in which the number of radial protrusions from the central connecting portion was three. The cross section of this fiber is approximately Y-shaped and the single yarn fineness is 32d.
Met. The surface structure of the obtained fiber was measured using a scanning electron microscope and a three-dimensional surface analyzer, and the depth of the groove-shaped concave and convex portions parallel to the fiber axis direction was 0.4 μm on average.
m to 20 to 3 at any 50 μm spacing around the perimeter of the fiber
It had 0 recesses.

Next, the fibers obtained as described above are
After repeating the average of 10 peaks and troughs in a linear distance of 100 mm and the sum of the height of the peaks and the depth of the valleys to be 7 mm on average, a giraffe crimping process was performed to form a substantially corrugated fiber bundle. A braid product of 5 g × 30 steps (regular size), which is a simple blade, was created, and the results of five-level evaluation of three items of gloss, touch and bulkiness are shown in Table 1.
It was shown to.

Comparative Example 1 The same copolymer resin as in Example 1 was dissolved in acetone to give a spinning dope of 28% by weight, and cellulose acetate was added to 3.0% by weight based on 97% by weight of the resin.
Was mixed in the spinning dope so that After thoroughly mixed, the resulting fiber was spun into a 30% by weight aqueous acetone solution, and the obtained fiber was stretched 2 times with the solvent remaining, then
After drying at 0 ℃, heat stretching 2.5 times, and then 145 ℃
Was subjected to relaxation heat treatment. The nozzle used was a substantially Y-shaped cross-sectional shape in which the number of radial protrusions from the central connecting portion was three. The cross section of this fiber is approximately Y-shaped and the single yarn fineness is 32d.
Met. The depth of the groove-shaped concave and convex portions parallel to the fiber axis direction on the obtained fiber surface was 0.75 μm on average, and there were 14 concave portions within an arbitrary 50 μm on the outer peripheral line of the fiber. With respect to this fiber, a blade product similar to that in Example 1 was prepared and evaluated in the same manner. The results are shown in Table 1.

Comparative Example 2 The same copolymer resin as in Example 1 was dissolved in acetone to give a spinning dope of 28% by weight, and 30% by weight of acetone was added as it was without mixing with polyvinyl acetate, cellulose acetate or the like. The fiber obtained by spinning in an aqueous solution was drawn 2 times in the state where the solvent remained, then dried at 120 ° C., hot drawn 2.5 times, and further subjected to relaxation heat treatment at 145 ° C. . As the spinning nozzle, a substantially star-shaped cross-sectional shape (corresponding to 25H × φ0.35) in which the number of radial protrusions from the central connecting portion was 5 was used. The cross section of this fiber was substantially star-shaped and the single yarn fineness was 45d. According to a scanning electron microscope and a three-dimensional surface analyzer, the surface of the obtained fiber had numerous recesses having a depth of 0.03 μm or less on the outer peripheral line of the fiber. With respect to this fiber, a blade product similar to that in Example 1 was prepared and evaluated in the same manner. The results are shown in Table 1. This fiber was too glossy and had a slightly sticky feel.

Example 2 The same copolymer resin as in Example 1 was dissolved in acetone to prepare a 28% by weight spinning solution. Polyvinyl acetate (Goshenil Y-2 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was mixed in the spinning dope in an amount of 4.0% by weight based on 96% by weight of the resin. After thoroughly mixed, the resulting fiber was spun into a 30 wt% acetone aqueous solution, and the obtained fiber was stretched 2 times in the state where the solvent remained, and then 1
After drying at 20 ° C, heat stretching of 2.5 times is performed, and further 145
Relaxation heat treatment was performed at ℃. The spinning nozzle has a cross-sectional shape
A substantially Y-shape (corresponding to 50H × φ0.38) in which the number of radial protrusions from the central connecting portion was three was used. The cross section of this fiber was substantially Y-shaped and the single yarn fineness was 32d. The surface structure of the obtained fiber was measured using a scanning electron microscope and a three-dimensional surface analyzer, and the average depth of the groove-shaped concaves and convexes parallel to the fiber axis direction was 0.5 μm. 25 to 35 recesses were provided at an arbitrary interval of 50 μm. With respect to this fiber, a blade product similar to that in Example 1 was prepared and evaluated in the same manner. The results are shown in Table 1.
It was shown to. This fiber is a fiber in which the amount of polyvinyl acetate added is increased as compared with Example 1, but the same evaluation result as in Example 1 was obtained.

<Example 3> Using the same copolymer resin as in Example 1, a spinning solution was prepared in the same manner as in Example 1 and spun in a 30% by weight aqueous acetone solution. As the nozzle, a round hole φ30 × 100H was used. The conditions such as stretching are the same as in Example 1. The cross-sectional shape of this fiber was horseshoe-shaped (see FIG. 4). The depth of the groove-shaped concave and convex portions parallel to the fiber axis on the surface of this fiber was 0.4 μm on average, and 25 to 35 concave portions were provided at arbitrary 50 μm intervals on the outer peripheral line of the fiber. With respect to this fiber, a blade product similar to that in Example 1 was prepared and evaluated in the same manner. The results are shown in Table 1. Although this fiber is excellent in terms of touch and gloss, it has no feature in bulkiness.

Example 4 A copolymer resin containing 52% by weight of acrylonitrile, 47% by weight of vinylidene chloride and 1% by weight of sodium styrenesulfonate was dissolved in acetone to prepare a spinning dope of 30% by weight. Polyvinyl acetate (Goshenil Y-2 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was mixed in the spinning dope in an amount of 3.0% by weight with respect to 97% by weight of the resin. After mixing well, the mixture was spun into a 30 wt% acetone aqueous solution. The obtained fiber was stretched 2 times with the solvent remaining, and then dried at 125 ° C.,
It was heat-stretched 2.5 times and further subjected to relaxation heat treatment at 150 ° C. The same spinning nozzle as in Example 1 was used. The cross section of this fiber was substantially Y-shaped, and the single yarn fineness was 32d. When the surface structure of the obtained fiber was measured using a scanning electron microscope and a three-dimensional surface analyzer, the depth of the groove-shaped concave and convex portions parallel to the fiber axis direction was 0.2 μm on average,
It had 17 to 25 recesses at arbitrary 50 μm intervals on the outer circumference of the fiber. With respect to this fiber, a blade product similar to that in Example 1 was prepared and evaluated in the same manner. The results are shown in Table 1. This fiber is a fiber in which the amount of polyvinyl acetate added is increased as compared with Example 1, but the same evaluation result as in Example 1 was obtained.

[0027]

[Table 1]

[0028]

The artificial hair fiber according to claim 1 has groove-shaped irregularities parallel to the fiber axis direction on the surface thereof, and the depth of the concave portions in the irregularities is in the range of 0.05 to 0.7 μm. In addition, by satisfying the condition that 15 to 40 concave portions are present at arbitrary intervals of 50 μm on the outer peripheral line of the fiber and the single yarn fineness is 25 to 75 d, as is clear from Table 1, it is natural. It is possible to obtain a fiber having a glossy and soft feel and an excellent volume feeling.

The cross-sectional shape of this fiber is preferably a shape having three or more protruding portions radially protruding from one central connecting portion, and among them, the shape having less protruding portions is more excellent in volume feeling. There is.

Further, by using a fiber bundle obtained by crimping such fibers as Giar crimp or the like, a head ornament product such as a blade having excellent bulkiness can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a fiber.

FIG. 2 is an explanatory view showing the depth of recesses on the fiber surface.

3 (a) to 3 (d) are cross-sectional views of a fiber showing an example of the cross-sectional shape of the fiber for artificial hair according to the present invention.

FIG. 4 is a cross-sectional view showing a cross-sectional shape of a fiber for artificial hair according to Example 3.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Nishiura 3-3-26-107 Nishi-Akashikitamachi, Akashi-shi, Hyogo

Claims (6)

[Claims] 1. A fiber for artificial hair made of an acrylic polymer containing 30% by weight or more of acrylonitrile, which has groove-shaped irregularities parallel to the fiber axis direction on the fiber surface, and the concave portions of the irregularities The average depth is 0.05 to 0.7
Arbitrary 50μ in the range of μm and at the outer circumference of the fiber
There are 15 to 40 recesses at m intervals, and the single yarn fineness is 2
A fiber for artificial hair, which is 5 to 75 d. 2. The fiber for artificial hair according to claim 1, wherein the cross section of the fiber has a shape having three or more protruding portions radially protruding from one central connecting portion. 3. The artificial hair fiber according to claim 1 or 2, wherein the fiber is for hair decoration. 4. The fiber for artificial hair according to claim 3, wherein the hair decoration is a wig, a hair piece, a blade, extension hair, or doll hair. 5. A fiber bundle for headdress, which is formed by crimping the fiber for artificial hair according to claim 1 or 2. 6. The fiber bundle for headdress according to claim 5, wherein the fiber bundle is a wig, a hair piece, a blade, an extension hair, or a doll hair.