JP6829591B2 - Artificial hair, manufacturing method of synthetic fibers constituting artificial hair, manufacturing method of artificial hair and wig - Google Patents

Description

The present invention relates to artificial hair in which synthetic fibers are dyed with a dye. In particular, the present invention can eliminate the extreme difference between the brightness of the actual artificial hair color and the brightness of the artificial hair in the image taken by the infrared camera. The present invention relates to a method for producing synthetic fibers, a method for producing artificial hair, and a wig.

In addition to human hair, artificial hair is used for wigs. As shown in FIG. 9A, the general artificial hair 100 has a structure in which synthetic fibers 101 are dyed with dye 102. As the synthetic fiber 101, for example, polyester, nylon, acrylic or vinyl chloride synthetic fibers are used.

Japanese Unexamined Patent Publication No. 2016-169441 Japanese Unexamined Patent Publication No. 2011-42882 JP-A-2009-228159 Japanese Unexamined Patent Publication No. 2008-69505 Re-table 2005/004652

<Problems with infrared cameras>
In recent years, infrared cameras that can shoot in the dark or at night have become widely used. For example, some digital cameras, video cameras, security surveillance cameras, drive recorders, doorphones, etc. irradiate a near-infrared light source of 0.7 to 2.5 μm to enable shooting in dark places or at night. ..

On the other hand, the present inventors have been studying the effect of infrared rays on a wig for a long time, and have found that artificial hair dyed in black is displayed in white in an image of an infrared camera. In other words, a person wearing a black-haired wig will have gray hair in the image of the infrared camera. The present inventors called such a problem of an infrared camera the "Santa Claus phenomenon", and have been conducting research and development to solve the problem.

As shown in FIG. 10A, the Santa Claus phenomenon occurs in the conventional artificial hair 100 because the near-infrared light source transmitted through the dye 102 is reflected by the synthetic fiber 101. The undyed synthetic fiber 101 is a transparent white color, and as a result of reflecting a large amount of a near-infrared light source, it is displayed in a bright white color in a monochrome infrared image. FIG. 10B shows the artificial hair 100 dyed black. FIG. 10C shows an image of the artificial hair 100 taken with an infrared camera.

Here, the Santa Claus phenomenon caused by the infrared camera becomes a problem when the difference between the color brightness of the actual artificial hair 100 and the brightness of the artificial hair (white) in the image taken by the infrared camera is large. That is, when the actual artificial hair 100 has a high brightness color, for example, light brown, gold, silver, white, etc., there is no large difference in brightness from the artificial hair (white) in the image taken by the infrared camera. , There is no visual discrepancy. On the other hand, when the actual artificial hair 100 has a low lightness color, for example, black, dark brown, or other dark color, there is an extreme difference in lightness from the artificial hair (white) in the image taken by the infrared camera. And cause a visual discrepancy. Therefore, the solution to the Santa Claus phenomenon only needs to be taken for artificial hair that is dyed in a lighter color.

Therefore, the present inventors have developed the artificial hair 200 shown in FIG. 9B in order to solve the Santa Claus phenomenon. The artificial hair 200 has a structure in which carbon black 203 is uniformly dispersed inside the synthetic fiber 201. The synthetic fiber 201 is dyed with a low-brightness dye 202, such as black. By uniformly dispersing the carbon black 203 inside the synthetic fiber 201, the reflection of the near-infrared light source transmitted through the dye 202 was suppressed, and as a result, the Santa Claus phenomenon could be eliminated.

<Problem of flocked eyes>
However, the artificial hair 200 shown in FIG. 9B has a problem that it is not possible to form a flocked eye having a high lightness color, and the knot when it is attached to the wig base becomes conspicuous. FIG. 9C shows the flocked eyes 103 of the conventional artificial hair 100. The flocked eye 103 is an unstained area bound to the net constituting the wig base. That is, in the flocked eyes 103, the high-brightness ground color of the synthetic fiber 101 is exposed. By tying the flocked stitch 103 of such a high-brightness color as a knot, the ball of the knot can be made inconspicuous.

On the other hand, in the artificial hair 200 shown in FIG. 9B, since the carbon black 203 is uniformly dispersed inside the synthetic fiber 201, the background color of the synthetic fiber 201 is dark, and a part of the artificial hair 200 is covered. Even in the unstained area, it is not possible to form flocked eyes with a high light color.

The present invention has been made in view of the above problems, and an object of the present invention is as follows.
i) To eliminate the extreme difference between the lightness of the actual artificial hair color and the lightness of the artificial hair in the image taken by the infrared camera, and to form a flocked eye with a high light color. To provide artificial hair that is possible.
ii) Provided is a method for producing synthetic fibers constituting the artificial hair of the present invention.
iii) Provided is a method for producing artificial hair capable of efficiently mass-producing the artificial hair of the present invention.
iv) Provided is a wig equipped with the artificial hair of the present invention.

(A) In order to achieve the above object, the artificial hair of the present invention is an artificial hair in which synthetic fibers are dyed with a dye, and the color brightness of the undyed synthetic fibers is B1, and the dyed artificial hair. When the lightness of the color of is B2 and the lightness of the artificial hair in the image taken by an infrared camera irradiating a near-infrared light source is B3, the amount that satisfies both the following relationships (1) and (2). It is characterized in that an infrared absorbing dye is added to the synthetic fiber.
Brightness B1> Brightness B2 ... (1)
Brightness B1> Brightness B3 ... (2)

(B) Preferably, in the artificial hair of (A), the infrared absorbing dye may be added to the inside of the synthetic fiber.

(C) Preferably, in the artificial hair of (A), the infrared absorbing dye is added to the surface of the synthetic fiber.

(D) It is preferable that the artificial hair according to any one of (A) to (C) has a structure in which the infrared absorbing dye is a phthalocyanine compound.

(E) Preferably, in any of the artificial hairs (A) to (D), an unstained region having a lightness of B1 is provided on a part of the artificial hair, and the unstained region is used as a flocked eye on the wig base. It is good to have a configuration.

(F) Preferably, in the artificial hair of the above (E), the flocked eyes may be provided at any part between one end and the other end of the artificial hair.

(G) Preferably, in the artificial hair of the above (F), the flocked eyes may have a length of about 4 mm.

(H) In order to achieve the above object, the method for producing synthetic fibers constituting artificial hair of the present invention is the method for producing synthetic fibers constituting artificial hair according to the above (B), and the synthetic fiber is produced. The synthetic fiber in which the infrared absorbing dye is melt-kneaded into a raw material chip of the fiber, and after a subsequent spinning step, an amount of the infrared absorbing dye that satisfies both the relationships (1) and (2) is added to the inside. It is characterized by obtaining.

(I) Preferably, in the method for producing a synthetic fiber of the above (H), the thickness of the synthetic fiber is within the range of 0.001 to 0.15 mm, and the synthetic fiber is melt-kneaded into the raw material chip of the synthetic fiber. The amount of the infrared absorbing dye is preferably in the range of 1000 to 50 ppm.

(J) Preferably, in the method for producing a synthetic fiber of (I), the thickness of the synthetic fiber is 0.1 mm or less, and the amount of the infrared absorbing dye to be melt-kneaded into the raw material chip of the synthetic fiber is It is preferably 85 ppm or more.

(K) In order to achieve the above object, the method for producing synthetic fibers constituting artificial hair of the present invention is the method for producing synthetic fibers constituting artificial hair according to the above (B), and at least the above. The synthetic fiber is made to absorb the aqueous dispersion containing the infrared absorbing dye, and the synthetic fiber is obtained by adding the infrared absorbing dye in an amount satisfying both the relationships (1) and (2). It is a feature.

(L) Preferably, in the method for producing the synthetic fiber of (K), the amount of the infrared absorbing dye contained in the aqueous dispersion is within the range of 4 to 6% owf of the weight of the synthetic fiber to be absorbed. It is good to be.

(M) In order to achieve the above object, the method for producing synthetic fibers constituting artificial hair of the present invention is the method for producing synthetic fibers constituting artificial hair according to the above (C), and at least the above. A sizing agent containing an infrared absorbing dye is printed on the synthetic fiber to obtain the synthetic fiber having the infrared absorbing dye added to the surface in an amount satisfying both the relationships (1) and (2). To do.

(N) Preferably, in the method for producing the synthetic fiber of (M), the amount of the infrared absorbing dye contained in the glue is in the range of 0.5 to 20% of the total amount of the glue. Good.

(O) In order to achieve the above object, the method for producing artificial hair of the present invention is the method for producing artificial hair according to any one of (A) to (G) above, and the dye is used by a computer. The step of transmitting the color data of the above to the printer, the step of printing the sublimation ink of a predetermined color corresponding to the color data on the transfer paper by the printer, and the step of printing the sublimation ink on the surface of the transfer paper. It is characterized by including a step of sandwiching a synthetic fiber and a step of heat-pressing the transfer paper by a sublimation transfer machine to sublimate and transfer the sublimation ink to the synthetic fiber.

(P) Preferably, in the method for producing artificial hair of (O), a bundle of synthetic fibers is sandwiched between the surfaces of the transfer paper on which the sublimation ink is printed, and the transfer paper is transferred by the sublimation transfer machine. The sublimation ink may be sublimated and transferred to the bundle of synthetic fibers by heat pressing.

(Q) Preferably, in the method for producing artificial hair of (O) or (P), the sublimation ink is printed on two or more areas of the transfer paper by the printer, and the sublimation ink is printed. It is preferable that the flocked eyes, which are undyed regions of lightness B1, are formed on a part of the artificial hair by the distance between the two regions.

(R) In order to achieve the above object, the wig of the present invention is characterized in that the artificial hair according to any one of (A) to (G) above is transplanted to the wig base.

According to the artificial hair of the present invention, it is possible to eliminate an extreme difference between the lightness of the actual artificial hair color and the lightness of the artificial hair in the image taken by the infrared camera, and the color has a high lightness. It is possible to form a flocked eye.

According to the method for producing synthetic fibers constituting artificial hair of the present invention, an amount of infrared absorbing dye that satisfies all of the above relationships (1) and (2) is produced by either melt kneading, exhaustion, or printing. Synthetic fibers added to the inside can be obtained, and the artificial hair of the present invention can be realized.

The method for producing artificial hair of the present invention can be carried out by extremely simple equipment such as a computer, a printer and a sublimation transfer machine. Then, according to the method for producing artificial hair of the present invention, the process of dyeing synthetic fibers and the step of forming flocked eyes can be easily performed at the same time by applying the sublimation heat transfer technique, and the artificial hair of the present invention can be easily performed. Can be mass-produced efficiently.

According to the wig of the present invention, even if the person wearing the wig is photographed by an infrared camera, the brightness of the actual artificial hair color and the brightness of the artificial hair in the image photographed by the infrared camera are between. The extreme difference disappears, and the problem of the so-called Santa Claus phenomenon is solved.

FIG. 1A is a partial cross-sectional view showing undyed synthetic fibers constituting the artificial hair according to the first embodiment of the present invention. FIG. 1B is a partial cross-sectional view showing the dyed artificial hair according to the first embodiment of the present invention. FIG. 2A is a partial cross-sectional view showing undyed synthetic fibers constituting the artificial hair according to the second embodiment of the present invention. FIG. 2B is a partial cross-sectional view showing the dyed artificial hair according to the second embodiment of the present invention. FIG. 3A is a partial cross-sectional view showing the relationship between the artificial hair and infrared rays according to the first embodiment. FIG. 3B is a partial cross-sectional view showing the relationship between the artificial hair and infrared rays according to the second embodiment. FIG. 4A is an external view showing artificial hair of the first and second embodiments dyed in black. FIG. 4B is an external view showing an image of the artificial hair taken with an infrared camera. 5 (a) to 5 (e) are schematic views showing each step of the method for producing artificial hair according to the embodiment of the present invention. FIG. 6 is a flowchart showing each step of the method for producing artificial hair. FIG. 7A is a plan view of the transfer paper used for dyeing the artificial hair. FIG. 7B is a plan view showing one method of dyeing the artificial hair and forming flocked eyes. FIG. 7 (c) is a plan view showing another method of dyeing the artificial hair and forming a flocked eye. FIG. 7D is a partial cross-sectional view showing the flocked eyes of the artificial hair. FIG. 8 is a schematic view of the wig according to the embodiment of the present invention as viewed from the back surface. FIG. 9A is a partial cross-sectional view showing conventional artificial hair. FIG. 9B is a partial cross-sectional view showing artificial hair containing carbon black devised by the applicant. FIG. 9C is an external view showing the flocked eyes of the conventional artificial hair. FIG. 10A is a partial cross-sectional view showing the relationship between conventional artificial hair and infrared rays. FIG. 10B is an external view showing conventional artificial hair dyed black. FIG. 10C is an external view showing an image of conventional artificial hair taken with an infrared camera.

Hereinafter, artificial hair, a method for producing synthetic fibers constituting artificial hair, a method for producing artificial hair, and a wig according to an embodiment of the present invention will be described with reference to the drawings.

<Artificial hair>
First, the artificial hair according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.

FIG. 1 shows the configuration of the artificial hair 1 according to the first embodiment of the present invention. FIG. 2 shows the configuration of the artificial hair 1 according to the second embodiment of the present invention. As shown in FIGS. 1 (b) and 2 (b), the artificial hair 1 of the first and second embodiments has a structure in which the synthetic fiber 10 is dyed with the dye 12, and the synthetic fiber 10 is formed. Is added a predetermined amount of the infrared absorbing dye 11.

However, the artificial hair 1 of the first embodiment and the artificial hair 1 of the second embodiment have different configurations for adding a predetermined amount of the infrared absorbing dye 11 to the synthetic fiber 10. As shown in FIG. 1A, in the artificial hair 1 of the first embodiment, a predetermined amount of infrared absorbing dye 11 is added to the inside of the synthetic fiber 10. On the other hand, as shown in FIG. 2A, in the artificial hair 1 of the second embodiment, a predetermined amount of infrared absorbing dye 11 is added to the surface of the synthetic fiber 10. The synthetic fiber 10 constituting the artificial hair 1 can effectively prevent the above-mentioned Santa Claus phenomenon regardless of the configuration shown in FIGS. 1 (a) and 2 (a).

Here, the predetermined amount of the infrared absorbing dye 11 required to prevent the Santa Claus phenomenon is B1 for the color brightness of the undyed synthetic fiber 10, B2 for the color brightness of the dyed artificial hair 1, and a near-infrared light source. When the brightness of the artificial hair 1 in the image taken by the irradiating infrared camera is B3, it means an amount that satisfies both of the following relationships (1) and (2). More preferably, in addition to the following (1) and (2), the amount may satisfy the following relationship (3).
Brightness B1> Brightness B2 ... (1)
Brightness B1> Brightness B3 ... (2)
Brightness B2 ≒ Brightness B3 ... (3)

By adding a predetermined amount of the infrared absorbing dye 11 to the inside or the surface of the synthetic fiber 10, the artificial hair 1 keeps the ground color of the synthetic fiber 10 at a high brightness B1 and artificially in the image taken by the infrared camera. It is possible to lower the lightness B3 of the hair 1.

As the synthetic fiber 10, for example, polyester, nylon, acrylic or vinyl chloride synthetic fibers can be used, and the synthetic fiber is processed so that the lightness B1 of the ground color is high or the lightness B1 of the ground color is not low. .. The background color of the synthetic fiber 10 is preferably closer to white when observed with the naked eye. Further, the ground color of the synthetic fiber 10 may be a translucent color having a high brightness B1. By increasing the lightness B1 of the ground color of the synthetic fiber 10, the flocked eyes 10a (FIGS. 5 (e) and 7 (d)) described later become inconspicuous. In the present embodiment, the background color of the synthetic fiber 10 is described as white, and the synthetic fiber 10 is shown in light gray for convenience in order to distinguish it from the background color of the drawings.

As the infrared absorbing dye 11, a dye having little influence on the ground color of the synthetic fiber 10 and the surface traits of the synthetic fiber 10 is used. For example, it is preferable to use a phthalocyanine compound as the infrared absorbing dye 11. As a result of the tests conducted by the present inventors, the trade names "FDN-003" and "FDN-004", which are infrared absorbing dyes of Yamada Chemical Co., Ltd., were described above by adding a relatively small amount to the synthetic fiber. An artificial hair satisfying both the relationships (1) and (2) was obtained. The maximum absorption wavelength of the product name "FDN-003" is 853 (nm), and the maximum absorption wavelength of the product name "FDN-004" is 880 (nm). Two or more types of infrared absorbing dyes 11 having different maximum absorption wavelengths (nm) may be mixed and added to the synthetic fiber 10. With such a configuration, the wavelength region of infrared rays that can be absorbed by the synthetic fiber 10 can be widened. The method for producing the synthetic fiber 10 to which the predetermined amount of the infrared absorbing dye 11 is added will be described in detail later.

On the other hand, as the dye 12 for dyeing the synthetic fiber 10, a color having a low lightness B2 such as black, dark brown, or other dark colors is used. When the lightness B2 of the color of the artificial hair 1 is high, there is no extreme difference from the lightness B3 of the artificial hair (white) in the image taken by the infrared camera, and no visual discrepancy (Santa Claus phenomenon) occurs. Is. In this embodiment, the dye 12 will be described as having the same black color as the drawing.

<Effect of artificial hair>
As shown in FIGS. 3A and 3B, when the artificial hair 1 of the present embodiment receives the near-infrared light source IR irradiated from the infrared camera, the near-infrared light source IR is inside the synthetic fiber 10. Alternatively, it is absorbed by a predetermined amount of infrared absorbing dye 11 added to the surface. As a result, as shown in FIG. 4B, the brightness B3 of the artificial hair 1 in the image taken by the infrared camera becomes low. As a result, there is an extreme between the black lightness B2 of the actual artificial hair 1 shown in FIG. 4A and the lightness B3 of the artificial hair 1 in the image taken by the infrared camera shown in FIG. 4B. There is no difference. That is, the black artificial hair 1 is displayed as dark as black even when photographed with an infrared camera, and there is no visual discrepancy between the two. Therefore, according to the artificial hair 1 of the present embodiment, it is possible to effectively solve the Santa Claus phenomenon that a person wearing a black hair wig turns gray hair in an image of an infrared camera.

Further, in the artificial hair 1 of the present embodiment, the ground color of the synthetic fiber 10 is maintained in white with a high lightness B1 even after a predetermined amount of the infrared absorbing dye 11 is added. As shown in FIG. 7 (d), a white flocked eye (unstained region) 10a having a high lightness B1 can be formed. The white flocked eyes 10a having a high lightness B1 have an effect of making the knots inconspicuous when the artificial hair 1 is tied to the wig base.

<Manufacturing method of synthetic fibers that make up artificial hair>
Next, the first to third embodiments will be described with respect to the method for producing the synthetic fiber 10 shown in FIGS. 1 (a) and 2 (a).

<< First Embodiment >>
When the synthetic fiber 10 is polyester, the synthetic fiber 10 shown in FIG. 1A can be produced through each step of melt kneading and spinning. That is, a predetermined amount of the infrared absorbing dye 11 is mixed with the raw material chip of the synthetic fiber 10. This mixture is supplied to an extruder, and the raw material chips and the infrared absorbing dye 11 are melt-kneaded. Through the subsequent spinning step, a synthetic fiber 10 to which an infrared absorbing dye 11 in an amount satisfying both the above relationships (1) and (2) is added is obtained. A predetermined amount of the infrared absorbing dye 11 is uniformly dispersed inside the synthetic fiber 10 obtained by this production method.

The present inventors have inversely proportional the thickness of the synthetic fiber 10 finally obtained as a result of actually carrying out the production method of the first embodiment described above and the amount of the infrared absorbing dye 11 required to prevent the Santa Claus phenomenon. I found out that That is, in order to satisfy both the above relationships (1) and (2), the thinner the synthetic fiber 10, the more infrared absorbing dye 11 needs to be added. When the thickness of the synthetic fiber 10 is in the range of 0.001 to 0.15 mm, the infrared absorbing dye 11 in the range of 1000 to 50 ppm is required to satisfy both the above relationships (1) and (2). Needs to be mixed with the raw material chips of the synthetic fiber 10. For example, when the thickness of the synthetic fiber 10 is 0.07 mm, in order to satisfy both the above relationships (1) and (2), at least about 85 ppm of the infrared absorbing dye 11 is used as the raw material chip of the synthetic fiber 10. Need to be mixed with.

<< Second Embodiment >>
The synthetic fiber 10 shown in FIG. 1A can also be produced by sucking up an aqueous dispersion containing a predetermined amount of the infrared absorbing dye 11.

Specifically, the aqueous dispersion contains a leveling agent, a dispersant, a surfactant and the like in addition to a predetermined amount of the infrared absorbing dye 11. The amount of the infrared absorbing dye 11 contained in the aqueous dispersion is appropriately adjusted according to the material of the synthetic fiber 10. According to the tests conducted by the present inventors, if the amount of the infrared absorbing dye 11 is within the range of 4 to 6% owf of the weight of the synthetic fiber 10 that absorbs the aqueous dispersion, the above (1) and (2) All of the relationships are satisfied. As the surfactant contained in the aqueous dispersion, nonionic or anionic surfactants are preferable.

Such an aqueous dispersion can be absorbed by the synthetic fiber 10 using, for example, an exhaust dyeing machine. As the exhaust dyeing machine, for example, an Overmeier dyeing machine is used. In the closed high-pressure container of the Overmeier dyeing machine, pressurized steam of the aqueous dispersion is generated, and the synthetic fiber 10 is subjected to a wet heat treatment. As a result, an amount of the infrared absorbing dye 11 that satisfies both the above relationships (1) and (2) is added to the inside of the synthetic fiber 10. According to the tests conducted by the present inventors, the temperature condition of the wet heat treatment is preferably in the range of 90 to 150 ° C. Under the temperature condition of less than 90 ° C., the infrared absorbing dye 11 is not sufficiently adhered to the synthetic fiber 10. Further, under the temperature condition of more than 150 ° C., adverse effects such as shrinkage of the synthetic fiber 10 occur.

<< Third Embodiment >>
The synthetic fiber 10 shown in FIG. 2A can be produced by imprinting a paste containing a predetermined amount of the infrared absorbing dye 11 on the synthetic fiber 10.

Specifically, the glue is selected according to the material of the synthetic fiber 10, but a water-soluble polymer diluted with an organic solvent is preferable. According to the tests conducted by the present inventors, if the amount of the infrared absorbing dye 11 contained in the sizing agent is within the range of 0.5 to 20% of the total amount of the sizing agent, the relationship between (1) and (2) above Are all satisfied. For example, the paste contains 20% of methyl methacrylate polymer as a water-soluble polymer and 80% of toluene, ethyl acetate and acetone as organic solvents. To the paste having this composition, an amount of the infrared absorbing dye 11 corresponding to 1.2% of the amount of the methyl methacrylate polymer is added.

The above-mentioned paste is printed on the surface of the synthetic fiber 10 by a printing machine equipped with a screen, a roller or the like. The synthetic fiber 10 on which the paste is stamped is heat-treated with steam or the like. By this heat treatment, the infrared absorbing dye 11 contained in the paste is fixed on the surface of the synthetic fiber 10. According to the tests conducted by the present inventors, the temperature condition of the heat treatment is preferably in the range of 90 to 140 ° C., particularly preferably in the range of 100 to 110 ° C. The synthetic fiber 10 that has undergone the heat treatment is washed with a washing liquid, washed with water, and then dried. As a result, an amount of the infrared absorbing dye 11 that satisfies both the above relationships (1) and (2) is added to the surface of the synthetic fiber 10.

<Manufacturing method of artificial hair>
Next, the method for producing artificial hair according to the embodiment of the present invention will be described with reference to FIGS. 5 to 7.

In the production method of the present embodiment, the synthetic fiber 10 shown in FIG. 1 (a) is dyed with the dye 12 shown in FIG. 1 (b) by applying the sublimation thermal transfer technique, and the flocked eyes shown in FIG. 7 (d) are dyed. An artificial hair 1 provided with 10a is produced. Such a manufacturing method of the present embodiment is realized by using the computer 2, the printer 3, the transfer paper 31, and the sublimation transfer machine 4 shown in FIGS. 5 (a) to 5 (d). Hereinafter, each step of the manufacturing method of the present embodiment will be described in detail.

<< Color data creation / transfer process >>
In step S1 of FIG. 6, first, the color data of the dye 12 is created by the computer 2 shown in FIG. 5A. As a method of creating color data, for example, a color sample of a color chart is measured with a measuring instrument, and the measurement result is quantified by a computer 2. The computer 2 converts, for example, the measurement result of the color sample into a CMYK value. The CMYK value defines a specific color by the ratio of the four components of cyan, magenta, yellow, and black.

The process proceeds to step S2 of FIG. 6, and the color data created by the computer 2 is transferred to the printer 3 shown in FIG. 5 (b). The computer 2 and the printer 3 are communicably connected via, for example, a USB cable (not shown).

<< Printing process >>
The printer 3 shown in FIG. 5B can be equipped with ink cartridges of a total of six colors of sublimation ink. Four of these ink cartridges are filled with cyan, magenta, yellow, and black sublimation inks.

Proceeding to step S3 of FIG. 6, the printer 3 blends four colors of sublimation ink in a predetermined ratio based on the color data received from the computer 2 to generate the dye 12 for dyeing the synthetic fiber 10. The dye 12 made of sublimation ink is printed on the transfer paper 31 for sublimation transfer.

Here, in the present embodiment, the dye 12 is printed on the transfer paper 31 in the manner shown in FIG. 7A. The transfer paper 31 of the present embodiment has a rectangular shape extending in the horizontal direction in the drawing. The dye 12 is printed on four regions arranged in the longitudinal direction of the transfer paper 31. Each area on which the dye 12 is printed is, for example, a rectangle having the same dimensions as the horizontally oriented A4 paper. A predetermined interval 31a is formed between the four regions on which the dye 12 is printed. In the present embodiment, the width of the interval 31a is set to 4 mm.

<< Pre-process of sublimation transfer >>
Proceeding to step S4 of FIG. 6, as a pre-step of sublimation transfer, a bundle of synthetic fibers 10 shown in FIG. 5 (c) is sandwiched between the dye 12-printed surfaces of the transfer paper 31. The bundle of synthetic fibers 10 has a structure in which one end of each of a large number of synthetic fibers 10 is bound to one thread and arranged side by side in a minoge shape so that the synthetic fibers 10 do not overlap each other. Such a bundle of synthetic fibers 10 is placed on the transfer paper 31 so as to straddle the dye 12 printed in the two regions. When the transfer paper 31 is folded in half in this state, almost the entire bundle of synthetic fibers 10 is sandwiched between the dyes 12 printed on the transfer paper 31. However, only the portion having a width of 4 mm corresponding to the central spacing 31a of the bundle of synthetic fibers 10 is not sandwiched between the dyes 12. Below, two methods of the pre-process of sublimation transfer are illustrated.

As a first method, as shown in FIG. 7 (b), a bundle of synthetic fibers 10 is placed side by side at the position of the upper half (or lower half) of the transfer paper 31. In this state, when the transfer paper 31 is folded in half along the center line extending in the longitudinal direction, almost the entire bundle of the synthetic fibers 10 is sandwiched between the dyes 12 printed on the transfer paper 31. However, only the portion having a width of 4 mm corresponding to the central spacing 31a of the bundle of synthetic fibers 10 is not sandwiched between the dyes 12.

As a second method, as shown in FIG. 7C, a bundle of synthetic fibers 10 is placed vertically and vertically at a position on the left half (or right half) of the transfer paper 31. In this state, when the transfer paper 31 is folded in half along the center line extending in the lateral direction, almost the entire bundle of the synthetic fibers 10 is sandwiched between the dyes 12 printed on the transfer paper 31. However, only the portion having a width of 4 mm corresponding to the central spacing 31a of the bundle of synthetic fibers 10 is not sandwiched between the dyes 12.

<< Sublimation transfer process >>
The sublimation transfer machine 4 shown in FIG. 5D includes a flat plate-shaped upper and lower iron. The upper and lower irons have a structure capable of being heat-pressed at a heating temperature of up to 200 ° C. and a pressing force of up to 600 kg, for example.

Proceeding to step S5 of FIG. 6, when the transfer paper 31 having the bundle of synthetic fibers 10 sandwiched between them is heat-pressed by the sublimation transfer machine 4, the dye 12 printed on the transfer paper 31 is sublimated into the bundle of synthetic fibers 10. Transferred. However, the dye 12 is not sublimated and transferred only to the portion of 4 mm corresponding to the central spacing 31a of the bundle of synthetic fibers 10. As a result, a bundle of dyed artificial hair 1 shown in FIG. 5 (e) is produced. As shown in FIG. 7D, a flocked eye 10a, which is an undyed region having a width of 4 mm, is formed in the center of the dyed artificial hair 1. The flocked eyes 10a exhibit a high white color with a lightness B1 which is the same as the ground color of the synthetic fiber 10.

<Effects of artificial hair manufacturing method>
The method for producing artificial hair of the present embodiment can be carried out by extremely simple equipment such as a computer 2, a printer 3, and a sublimation transfer machine 4. Then, according to the method for producing artificial hair of the present embodiment, the dyeing step of the synthetic fiber 10 and the forming step of the flocked eyes 10a can be easily performed at the same time by applying the sublimation heat transfer technique. As a result, the artificial hair 1 provided with the flocked eyes 10a shown in FIGS. 5 (e) and 7 (d) can be efficiently mass-produced.

In the above embodiment, the case where the artificial hair 1 having the flocked eyes 10a is produced by using the synthetic fiber 10 shown in FIG. 1A has been described. However, even if the synthetic fiber 10 shown in FIG. 2A is used, it is possible to produce the artificial hair 1 having the flocked eyes 10a in exactly the same manner as in the above embodiment.

<Wig>
Next, the wig according to the embodiment of the present invention will be described with reference to FIG. 8 and the like.

As shown in FIG. 8, the wig 5 of the present embodiment includes the artificial hair 1 having the flocked eyes 10a shown in FIGS. 5 (e) and 7 (d). The artificial hair 1 is transplanted to the wig base 51 constituting the wig 5. Artificial skin 52 is sewn on the portion corresponding to the hairline of the wig base 51. Further, artificial skin 53 is sewn on the portion corresponding to the division and the whorl of the wig base 51.

The wig base 51 of the present embodiment is composed of a bowl-shaped net that fits the curved surface of the wearer's head. As the material of the net, synthetic resins such as nylon, polyester and acrylic having excellent moldability and heat resistance are preferable, and natural fibers such as cotton, linen and silk may be used. On the other hand, the artificial skins 52 and 53 are made of, for example, a fine-grained skin-colored woven fabric (including a mesh or a net) made of synthetic fibers such as nylon, polyester and acrylic, and natural fibers such as cotton, linen and silk. is there.

Here, a method of flocking artificial hair 1 will be described. As shown in FIG. 5 (e), a flocked eye 10a, which is an unstained region, is formed in the center of the artificial hair 1. The artificial hair 1 is bent into a V-shape or a U-shape around the flocked eyes 10a, and in this state, the portion of the flocked eyes 10a constitutes the wig base 51 and the artificial skins 52 and 53. It is bound to the fiber.

<Effect of wig>
According to the wig 5 of the present embodiment, even if the person wearing the wig 5 is photographed by the infrared camera, the color brightness B2 of the actual artificial hair 1 and the artificial hair 1 in the image photographed by the infrared camera The extreme difference from the lightness B3 disappears, and the problem of the so-called Santa Claus phenomenon is solved.

<Other changes>
The artificial hair, the method for producing artificial hair, and the wig of the present invention are not limited to the above-described embodiments. For example, the ground color of the synthetic fiber 10 is not limited to white, and may be a color other than white that can form inconspicuous flocked eyes 10a. Further, the color of the artificial hair 1 dyed with the dye 12 is not limited to black, and may be a color other than black, which is a lightness B2 lower than the lightness B1 of the ground color of the synthetic fiber 10. Further, the artificial hair of the present invention is not limited to the dyeing method applying the sublimation heat transfer technique of the present embodiment, and may be produced by a conventional dyeing method.

1 Artificial hair 10 Synthetic fiber 10a Flocked eyes 11 Infrared absorbing pigment 12 Dye (sublimation ink)
2 Computer 3 Printer 31 Transfer paper 31a Interval 4 Sublimation transfer machine 5 Wig 51 Wig base 52, 53 Artificial skin

Claims (18)

Artificial hair dyed with synthetic fibers
The color brightness of the undyed synthetic fiber is B1,
The lightness of the dyed artificial hair color is B2,
When the brightness of the artificial hair in the image taken by an infrared camera that irradiates a near-infrared light source is B3,
An artificial hair characterized in that an amount of an infrared absorbing dye that satisfies both of the following relationships (1) and (2) is added to the synthetic fiber.
Brightness B1> Brightness B2 ... (1)
Brightness B1> Brightness B3 ... (2) The artificial hair according to claim 1, wherein the infrared absorbing dye is added to the inside of the synthetic fiber. The artificial hair according to claim 1, wherein the infrared absorbing dye is added to the surface of the synthetic fiber. The artificial hair according to any one of claims 1 to 3, wherein the infrared absorbing dye is a phthalocyanine compound. The artificial hair according to any one of claims 1 to 4, wherein an unstained region having a lightness of B1 is provided on a part of the artificial hair, and the unstained region is used as a flocked eye for a wig base. The artificial hair according to claim 5, wherein the flocked eyes are provided at any portion between one end and the other end of the artificial hair. The artificial hair according to claim 6, wherein the flocked eyes have a length of about 4 mm. The method for producing synthetic fibers constituting artificial hair according to claim 2.
The infrared absorbing dye is melt-kneaded into the raw material chip of the synthetic fiber, and the infrared absorbing dye is added to the inside in an amount satisfying both the relationships (1) and (2) after the subsequent spinning step. A method for producing a synthetic fiber, which comprises obtaining a synthetic fiber. According to claim 8, the thickness of the synthetic fiber is in the range of 0.001 to 0.15 mm, and the amount of the infrared absorbing dye to be melt-kneaded into the raw material chip of the synthetic fiber is in the range of 1000 to 50 ppm. The method for producing a synthetic fiber according to the above. The method for producing a synthetic fiber according to claim 9, wherein the thickness of the synthetic fiber is 0.1 mm or less, and the amount of the infrared absorbing dye to be melt-kneaded into the raw material chip of the synthetic fiber is 85 ppm or more. The method for producing synthetic fibers constituting artificial hair according to claim 2.
The aqueous dispersion containing at least the infrared absorbing dye is absorbed by the synthetic fiber to obtain the synthetic fiber to which the infrared absorbing dye is added in an amount satisfying both the relationships (1) and (2). A method for producing a synthetic fiber, which is characterized in that. The method for producing a synthetic fiber according to claim 11, wherein the amount of the infrared absorbing dye contained in the aqueous dispersion is within the range of 4 to 6% owf of the weight of the synthetic fiber to be absorbed. The method for producing synthetic fibers constituting artificial hair according to claim 3.
A glue containing at least the infrared absorbing dye is printed on the synthetic fiber to obtain the synthetic fiber having the infrared absorbing dye added to the surface in an amount satisfying both the relationships (1) and (2). A characteristic method for producing synthetic fibers. The method for producing a synthetic fiber according to claim 13, wherein the amount of the infrared absorbing dye contained in the glue is in the range of 0.5 to 20% of the total amount of the glue. The method for producing artificial hair according to any one of claims 1 to 7.
The process of transmitting the color data of the dye to the printer by a computer,
A process of printing a sublimation ink of a predetermined color corresponding to the color data on transfer paper by the printer.
A step of sandwiching the synthetic fiber on the surface of the transfer paper on which the sublimation ink is printed, and
A step of heat-pressing the transfer paper with a sublimation transfer machine to sublimate and transfer the sublimation ink to the synthetic fiber.
A method for producing artificial hair, which comprises. A bundle of the synthetic fibers is sandwiched between the surfaces of the transfer paper on which the sublimation ink is printed, and the transfer paper is heat-pressed by the sublimation transfer machine to sublimate and transfer the sublimation ink to the bundle of synthetic fibers. The method for producing artificial hair according to claim 15. The sublimation ink is printed on two or more regions of the transfer paper by the printer, and the space between the two regions on which the sublimation ink is printed is an undyed region of lightness B1 on a part of the artificial hair. The method for producing artificial hair according to claim 15 or 16, wherein the flocked eyes are formed. A wig characterized in that the artificial hair according to any one of claims 1 to 7 is transplanted to a wig base.