Artificial hair and manufacturing method thereof

Abstract

To provide artificial hair having a volume larger than that of conventional artificial hair and giving a fluffy impression, and a method for manufacturing the artificial hair.SOLUTION: Artificial hair has a fiber unit composed of a plurality of fibers 5. The fibers 5 each have a space 10 inside, and a cross-sectional shape part extends so as to surround the space 10. The fibers 5 have bending rigidity mutually different according to the bending direction, and thereby fibers each have directivity in ease of bending. The fibers 5 each are bent in the easy-to-bend direction to form a curl. The fiber unit has at least three curls bent in the directions different from each other.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to artificial hair and a method for producing artificial hair. [Background technology]

[0002] 2. Description of the Related Art Artificial hair fiber bundles that imitate human hair have been used as materials for head accessories such as wigs, extensions, braids, and hair bands (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-47846 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in recent years, random, voluminous, and fluffy hairstyles are sometimes preferred for some artificial hair for women. However, artificial hair using the artificial hair fiber bundle of Patent Document 1 has a regular shape, has small volume, and results in a boring hairstyle.

[0005] Therefore, an object of the present invention is to provide artificial hair that is larger in volume and gives a fluffy impression compared to conventional artificial hair, and a method for manufacturing the artificial hair. [Means for solving the problem]

[0006] One aspect of the present invention for solving the above-mentioned problems is artificial hair having a fiber unit having a plurality of fibers, the plurality of fibers having an internal space and a cross-sectional shape extending so as to surround the space, the plurality of fibers having different bending rigidities depending on the bending direction, each of the plurality of fibers being bent in a direction in which they are easily bent, and the fiber unit having at least three curls bent in different directions.

[0007] According to this aspect, the fiber units are curled in multiple directions, so that the fabric has more volume and gives a fluffy impression compared to conventional fabrics.

[0008] In a preferred aspect, the fiber has a cross-sectional shape having a first end and a second end at its circumferential end, and the first end and the second end are in contact or have a gap greater than 0 μm and less than 15 μm.

[0009] In a more preferred aspect, among the plurality of fibers, there is a fiber in which the gap is formed, the gap extends in the longitudinal direction of the fiber, and the space is connected to the outside via the gap.

[0010] In a preferred aspect, the fibers are made of acrylic fibers.

[0011] In a more preferred aspect, the fibers are comprised of modacrylic fibers.

[0012] A preferred aspect comprises a base portion supporting said textile unit and attachable to a user's head.

[0013] In a preferred aspect, the fiber has a cross section in which the diameter of the smallest inclusive circle of the outer circumferential surface is 70 μm or more and 100 μm or less.

[0014] The term "smallest encompassing circle of the outer periphery" used here refers to the largest circle whose entire outer periphery falls within the inner circle.

[0015] In a preferred aspect, the fiber has a cross section in which the diameter of the maximum included circle of the inner circumferential surface is 15 μm or more and 50 μm or less.

[0016] The term "maximum inclusive circle of the inner circumferential surface" used here refers to the largest circle that is included inside the inner circumferential surface.

[0017] In a preferred aspect, the fiber has a cross section in which the maximum distance between the inner circumferential surface and the outer circumferential surface is 15 μm or more and 40 μm or less.

[0018] One aspect of the present invention is a method for manufacturing the above-mentioned artificial hair, which includes, in this order, a band-shaped body forming step of connecting multiple fibers at connecting parts to form a band-shaped body, a heating step of wrapping the band around a rod-shaped body and heating it, a removal step of removing the band from the rod-shaped body, and a fixing step of sewing the band to a base part.

[0019] According to this aspect, since a plurality of fibers are arranged in a band shape and heated, it is easy to impart curls in a plurality of directions by varying the orientation of the fibers.

[0020] A preferred aspect includes a step of applying an external force to the band. Effect of the Invention

[0021] According to the present invention, it is possible to give an impression of greater volume and softness compared to the conventional art. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view showing a schematic state of artificial hair according to a first embodiment of the present invention when used. [Diagram 2] FIG. 2 is an explanatory diagram of the artificial hair in FIG. 1, where (a) is a perspective view of the artificial hair, and (b) is a perspective view seen from the opposite direction to (a). [Diagram 3] 3 is an explanatory diagram of the fiber unit in FIG. 2, where (a) is a front view of the fiber unit, and (b) is a cross-sectional end view of the fiber unit. [Figure 4]FIG. 4 is a cross-sectional perspective view of the fiber of FIG. [Diagram 5] 4 is a cross-sectional view perpendicular to the longitudinal direction of the fiber in FIG. 3. [Figure 6] FIG. 2 is an explanatory diagram of a heating step in the manufacturing process of the artificial hair of FIG. 1, and is a perspective view showing the time when a strip-shaped body is wound around a rod-shaped body together with a sheet. [Figure 7] FIG. 2 is an explanatory diagram of Comparative Examples 1 and 2 of the present invention, where (a) is a cross-sectional view perpendicular to the longitudinal direction of Comparative Example 1, and (b) is a cross-sectional view perpendicular to the longitudinal direction of Comparative Example 2. [Figure 8] 1A is an explanatory diagram of Example 1 of the present invention and Comparative Examples 1 and 2, where (a) is an image captured in Example 1, (b) is an image captured in Comparative Example 1, and (c) is an image captured in Comparative Example 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of the present invention will be described in detail.

[0024] The artificial hair 1 of the first embodiment of the present invention functions as a head accessory when attached to a braided portion 100 braided into the user's head, as shown in FIG. The artificial hair 1 includes a base portion 2 and a plurality of fiber units 3, as shown in FIG.

[0025] The base portion 2 is an attachment member that is attached to the braided portion 100 provided on the user's head, and also serves as a support member that supports a plurality of fiber units 3. The base portion 2 is a mesh-like sheet having a planar shape and is provided with a plurality of ventilation holes penetrating in the thickness direction.

[0026] As shown in FIG. 3, the fiber unit 3 includes a plurality of fibers 5 and a connection portion 6, and has a plurality of irregularly bent curls 7 formed therein. The fiber 5 has different bending stiffness depending on the bending direction, and is a fiber with directional bending ability. Specifically, as shown in FIG. 4, the fiber 5 is a hollow fiber having a substantially "C" shaped cross section extending in a predetermined direction, and is easily bent in one direction.

[0027] As shown in FIG. 5, the fiber 5 has a space 10 extending in the longitudinal direction therein, and has a cross-sectional shape extending in the circumferential direction S so as to surround the space 10. Specifically, fiber 5 has an inner surface 11, an outer surface 12, a first end 15, and a second end 16, and first end 15 and second end 16 form a communication portion 17 that connects space 10 to the outside.

[0028] As shown in FIG. 5, the inner peripheral surface 11 has an elliptical cross-sectional shape with a minor axis in a first direction (left-right direction in FIG. 5) and a major axis in a second direction (up-down direction in FIG. 5) perpendicular to the first direction. The outer peripheral surface 12, like the inner peripheral surface 11, has an elliptical cross-sectional shape with a minor axis in a first direction and a major axis in a second direction.

[0029] The first end 15 constitutes one end in the circumferential direction S, and constitutes a first inner corner 20 (first corner) together with the inner surface 11, and constitutes a first outer corner 21 together with the outer surface 12. The first inner corner 20 is gently rounded from the inner circumferential surface 11 side toward the first end 15 side. The first outer corner 21 is rounded from the first end 15 side toward the outer circumferential surface 12 side. The first end portion 15 forms an inclined surface from the inner circumferential surface 11 side toward the outer circumferential surface 12 side, and the first outer corner portion 21 protrudes in the circumferential direction S further than the first inner corner portion 20.

[0030] The second end 16 constitutes the other end in the circumferential direction S, and together with the inner surface 11 constitutes a second inner corner 30 (first corner), and together with the outer surface 12 constitutes a second outer corner 31. The second inner corner 30 is gently rounded from the inner circumferential surface 11 side toward the second end 16 side. The second outer corner 31 is rounded from the second end 16 side toward the outer circumferential surface 12 side. The second end portion 16 forms an inclined surface from the inner circumferential surface 11 side toward the outer circumferential surface 12 side, and the second outer corner portion 31 protrudes in the circumferential direction S further than the second inner corner portion 30.

[0031] As shown in FIG. 5, the communication portion 17 is a gap between the first end portion 15 and the second end portion 16, and is an open groove that connects the space 10 to the outside. The communicating portion 17 extends over most of the fiber 5 in the longitudinal direction, and in this embodiment, is formed over the entire fiber 5 in the longitudinal direction. The width of the communication portion 17 narrows from the inner circumferential surface 11 side toward the outer circumferential surface 12 side.

[0032] The diameter of the smallest inclusive circle of the inner circumferential surface 11 of the fiber 5 shown in FIG. 5 (the diameter of the inscribed circle C1) is preferably 15 μm or more, more preferably 20 μm or more, and further preferably 25 μm or more. It is preferable that the diameter of the smallest inclusive circle of the inner circumferential surface 11 of the fiber 5 (the diameter of the inscribed circle C1) is 50 μm or less. By setting the content within these ranges, the bulkiness and the feel can be further improved.

[0033] The diameter of the maximum inclusive circle of the outer peripheral surface 12 of the fiber 5 shown in FIG. 5 (the diameter of the circumscribing circle C2) is preferably 70 μm or more, more preferably 75 μm or more, and even more preferably 80 μm or more. The fibers 5 preferably have a diameter of the maximum inclusive circle of the outer circumferential surface 12 (diameter of the circumscribing circle C2) of 100 μm or less. By setting the content within these ranges, the bulkiness and the feel can be further improved.

[0034] The maximum thickness of the fibers 5 (the maximum distance between the inner circumferential surface 11 and the outer circumferential surface 12) is preferably 15 μm or more, more preferably 16 μm or more, and even more preferably 17 μm or more. The maximum thickness of the fibers 5 is preferably 40 μm or less, more preferably 35 μm or less, and even more preferably 32 μm or less. By setting the content within these ranges, the bulkiness and the feel can be further improved.

[0035] The fiber 5 has a distance D1 (width of the communicating portion 17) between the first end 15 and the second end 16 shown in FIG. 5 of preferably 15 μm or less, more preferably 10 μm or less, and even more preferably 5 μm or less. In the fibers 5, the distance D1 between the first end 15 and the second end 16 (the width of the communicating portion 17) is preferably 0 μm or more, and more preferably exceeds 0 μm. By setting the content within these ranges, it is possible to improve the feel and curl setting properties while further increasing the bulkiness.

[0036] It is preferable that the angle θ between the first end 15 and the second end 16 of the fiber 5 and the center O of the maximum inclusive circle (inscribed circle C1) shown in Figure 5 is 0° or more, and more preferably exceeds 0°. The angle θ is preferably 20° or less, more preferably 15° or less, further preferably 10° or less, and particularly preferably 5° or less. By setting the content within these ranges, the bulkiness can be further increased.

[0037] Fiber 5 has an average torsional stiffness of 1.3 mg cm 2 It is preferable that the concentration is 1.5 mg cm or more. 2 More preferably, it is 1.7 mg cm 2 More preferably, it is equal to or greater than this. Fiber 5 has an average torsional stiffness of 6.0 mg cm 2 Preferably, it is 5.5 mg cm or less. 2 More preferably, it is 5.0 mg cm 2 It is even more preferable that: The average torsional rigidity can be calculated, for example, by the following method. That is, using a torsion tester (KES-YN1, Kato Tech Co., Ltd.), the torsional rigidity of a sample (single yarn) with a length of 3 cm is measured under conditions of a torsional rotation number of ±3 rotations and a torsional speed of 12° / sec, and the average value of five measurements is taken as the average torsional rigidity value (unit: mg cm). 2 ) can be calculated as

[0038] Fiber 5 has an average bending stiffness of 4.0 x 10 -3 gf cm 2 / yarn or more is preferable, and 5.0×10 -3 gf cm 2 / yarn or more is preferable, and 6.0×10 -3 gf cm 2 / yarn or higher is even more preferable. Fiber 5 has an average bending stiffness of 15.0×10 -3 gf cm 2 / yarn or less is preferable, and 14.0 × 10 -3 gf cm 2 / yarn or less is preferable, and 13.0 × 10 -3 gf cm 2 It is even more preferable that it is less than or equal to / yarn. By setting the content within these ranges, it is possible to further increase the bulkiness and to obtain a good feel to the touch. The average bending stiffness can be calculated, for example, by the following method. That is, using a KES-FB2 pure bending tester (manufactured by Kato Tech Co., Ltd.), 49 fibers (single yarns) are attached to a mount at intervals of 1 mm, and the attached fibers are fixed at the top and bottom with cellophane tape so as not to loosen. The obtained sample is fixed to a jig of the device and measured with a curvature of -2.5 to +2.5 (cm -1 Measurements were performed at a deformation speed of 0.5 cm / sec in the range of curvature from 0.5 to 1.5 (cm -1 ) and the average resilience between the fibers is measured, and the value per fiber can be calculated as the average bending stiffness.

[0039] The fiber 5 is formed of a fiber having elasticity, and specifically, is configured of an acrylic fiber (AC fiber) such as a modacrylic fiber (MODA fiber).

[0040] As shown in FIG. 3, the connection portion 6 is a portion that connects one end side of a plurality of fibers 5 in the longitudinal direction to form a fiber unit 3. The connection portion 6 in this embodiment is a sewn portion sewn with a first sewing thread, in which a plurality of fibers 5 are arranged in a cross direction (perpendicular direction) to the longitudinal direction, and each fiber 5 is connected by sewing the plurality of fibers 5 in a straight line in the cross direction (perpendicular direction) to the longitudinal direction.

[0041] The curl 7 is formed by bending the fibers 5 in a curved shape in the direction in which the fibers 5 are primarily likely to bend, as shown in Figures 3 and 4. That is, each fiber 5 has one direction in which it is primarily likely to bend, and since the direction in which the fibers 5 are primarily likely to bend differs for each fiber 5, the curl 7 is formed irregularly.

[0042] Next, the positional relationship of each part of the artificial hair 1 according to the first embodiment of the present invention will be described.

[0043] As shown in Figure 2, when the artificial hair 1 is viewed in a plane, the fiber units 3 are connected to the base part 2 so as to extend in the horizontal direction X, and multiple fiber units 3 are arranged side by side at intervals in the vertical direction Y. Each fiber unit 3 is sewn in the lateral direction X with a second sewing thread to form a sewn portion 40 and fixed to the base portion 2. The sewn portion 40 of each fiber unit 3 to the base portion 2 is provided in the vicinity of the connection portion 6 and at a position shifted from the connection portion 6 in the vertical direction Y. In one fiber unit 3, a portion of the fiber 5 in the vertical direction Y overlaps with the sewn portion 40 to the base portion 2 of the adjacent fiber unit 3 in the vertical direction Y, and the exposed portion of the base portion 2 between the adjacent fiber units 3, 3 is hidden by the fiber 5. In this embodiment, the sewn portions 40 extend linearly in the horizontal direction X, as shown in FIG. The distance between adjacent sewn portions 40, 40 in the longitudinal direction Y is preferably 0.5 cm or more. The distance between adjacent sewn portions 40, 40 in the longitudinal direction Y is preferably 2 cm or less. Within this range, the base portion 2 can be made less visible while still providing volume.

[0044] Each fiber unit 3 is supported in a cantilever manner on the base portion 2 by the sewn portion 40. That is, one end of the fiber 5 is fixed by the sewn portion 40, and the other end is a free end. The fiber unit 3 includes fibers 5 having a communicating portion 17 formed therein, and fibers 5 having a distance D1 of 0 μm between the first end 15 and the second end 16, i.e., the first end 15 and the second end 16 are in contact with each other. In other words, the fiber unit 3 includes a mixture of fibers 5 having a communicating portion 17 formed therein and fibers 5 having no communicating portion 17 and in which the first end 15 and the second end 16 are in contact with each other.

[0045] Next, a method for producing the artificial hair 1 according to the first embodiment of the present invention will be described.

[0046] The manufacturing method of the artificial hair 1 mainly comprises a belt-shaped body forming step, a heating step, a removing step, and a fixing step.

[0047] Specifically, first, as shown in FIG. 3, the fibers 5 are aligned in the longitudinal direction, and then sewn in a straight line across the middle of the aligned fibers 5 to form a strip 50, which is a work-in-progress of the fiber unit 3 (strip formation process).

[0048] At this time, the fibers 5 are arranged so that their ends are aligned, and are directly sewn together with the first sewing thread to form the connection portion 6. Further, the cross section of each fiber 5 is irregular, and the positions of the communicating parts 17 differ in the circumferential direction S. That is, the direction in which the fibers 5 tend to bend is not uniform.

[0049] 6, the strip 50 is placed on a heat-resistant sheet 51, and the heat-resistant sheet 51 is then wrapped around a rod 52, which is placed in a dryer and heated at a heating temperature T1 for a heating time t1 (heating step).

[0050] The heating temperature T1 at this time is equal to or higher than the softening temperature of the fibers 5, and is preferably 90° C. or higher, and more preferably 100° C. or higher. The heating temperature T1 is a temperature equal to or lower than the melting point temperature of the fibers 5, and is preferably 180° C. or lower, and more preferably 170° C. or lower. The heating time t1 is preferably 15 minutes or more, more preferably 30 minutes or more, and is preferably 24 hours or less, more preferably 12 hours or less, and even more preferably 1 hour or less. The diameter of the rod-shaped body 52 is preferably 20 cm or more, and more preferably 25 cm or more. The diameter of the rod-shaped body 52 is preferably 50 cm or less, and more preferably 40 cm or less.

[0051] Next, the rod 52 around which the strip 50 is wound is taken out from the dryer, and the strip 50 is removed (removal step).

[0052] At this time, the belt-like body 50 has curls formed in the fibers 5. That is, the fibers 5 are curled in a generally regular pattern.

[0053] Next, the band-shaped body 50 is layered on the base part 2 and sewn together, so that the band-shaped body 50 is fixed to the base part 2 in multiple stages (fixing process).

[0054] In this case, the number of stages of the belt-shaped bodies 50 fixed to the base portion 2 (the number of belt-shaped bodies 50 arranged in parallel) is not particularly limited, but is preferably 2 stages or more and 20 stages or less, and more preferably 5 stages or more and 15 stages or less.

[0055] Next, an external force is applied to the belt-shaped body 50 fixed to the base portion 2 to form the artificial hair 1 (external force application step).

[0056] At this time, the method of applying an external force to the strip 50 is not particularly limited as long as it disentangles the tangled fibers 5. For example, an external force can be applied to the strip 50 by untangling it with a comb. When an external force is applied, the fibers 5 are elastically deformed and bent in a direction that is easy to bend due to the elastic restoring force, so that artificial hair 1 in which the fibers 5 are bent randomly is formed.

[0057] According to the artificial hair 1 of this embodiment, the portion of the fiber 5 where the communicating portion 17 is connected has a lower bending rigidity than the other portions and is easily bent toward the communicating portion 17, so that random curls 7 are formed, and the artificial hair 1 can have a larger volume and a fluffy impression compared to conventional hair.

[0058] According to the artificial hair 1 of this embodiment, among the fibers 5 constituting the fiber unit 3, there are fibers 5 having communicating parts 17 formed therein, and the spaces 10 communicate with the outside via the communicating parts 17. Therefore, by applying an external force in the external force applying step, the fibers 5 are easily unraveled, and irregular curls 7 are easily formed.

[0059] The artificial hair 1 of the present embodiment includes a base portion 2 that supports the fiber unit 3 and can be attached to the braided portion 100 of the user's head. Therefore, it is easy to attach to the user's head.

[0060] In the above embodiment, the artificial hair 1 is attached directly to the user's head, but the present invention is not limited to this. The artificial hair 1 may be attached to the user's head via a cap member on which the braided portion 100 is formed.

[0061] In the above embodiment, the band-like body 50 is fixed to the base portion 2 and then an external force is applied to the band-like body 50, but the present invention is not limited to this. The band-like body 50 may be fixed to the base portion 2 after an external force is applied to the band-like body 50 to loosen the fibers 5.

[0062] In the above embodiment, the fiber 5 is wound around the rod-shaped body 52 to impart a curl, and then fixed to the base portion 2, but the present invention is not limited to this. The fiber 5 may be fixed to the base portion 2, and then wound around the rod-shaped body 52 to impart a curl. In this case, the fiber 5 is partially wound around the rod-shaped body 52.

[0063] In the above embodiment, the strip 50 is overlapped with the sheet and then wound around the rod 52, but the present invention is not limited to this. Only the strip 50 may be wound around the rod 52.

[0064] In the above-described embodiment, it is not necessary for all fibers in the artificial hair 1 to have the same fineness, cross-sectional shape, and cross-sectional size, and fibers having different fineness, cross-sectional shapes, and cross-sectional sizes may be mixed.

[0065] In the above-described embodiment, the artificial hair 1 may contain other types of fibers in addition to the fibers 5. Examples of other types of fibers include polyvinyl chloride fibers, nylon fibers, polyester fibers, and regenerated collagen fibers.

[0066] In the above-described embodiments, each component may be freely substituted or added between the respective embodiments as long as it falls within the technical scope of the present invention. EXAMPLES

[0067] EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples.

[0068] Example 1 Modacrylic fiber having a cross-sectional structure as shown in FIG. 5 was cut to a length of 45 cm and a weight of 9.4 g, and sewn at a position 20 cm from the end to form a strip. The strip was then stacked on a wrapping paper and fixed to the wrapping paper with tape, and the strip was wrapped around a metal pipe having a diameter of 32 mm so that the inside was the inside, and placed in a dryer. The strip was then heated at 100°C for 60 minutes, removed from the dryer, and allowed to cool in the air for 60 minutes. The strip was then removed from the wrapping paper, and 10 strips were sewn in parallel to a resin net, and the strips were unwound with a comb (SUNG JIN INDUSTRIAL CO.LTD, SJ-211 WOODEN BRUSH "S") to apply an external force to the curls. The artificial hair obtained in this manner was designated as Example 1.

[0069] Comparative Example 1 Comparative Example 1 was prepared in the same manner as in Example 1, except that modacrylic fibers having an H-shaped cross section as shown in FIG. 7(a) were used as the fibers.

[0070] Comparative Example 2 Comparative Example 2 was prepared in the same manner as in Example 1, except that modacrylic fibers having a dumbbell-shaped cross section as shown in FIG. 7(b) were used as the fibers.

[0071] Photographs taken of Example 1 and Comparative Examples 1 and 2 are shown in FIG.

[0072] In Comparative Examples 1 and 2, as shown in Figures 8(b) and 8(c), the curls were generally kept neat even when the hair was unraveled with a comb, whereas in Example 1, as shown in Figure 8(a), when the hair was unraveled with a comb, the fibers 5 came loose and random curls were formed, resulting in a greater volume than in Comparative Examples 1 and 2 and a fluffy impression. [Explanation of symbols]

[0073] 1 artificial hair 2 Base 3. Fiber Unit 5. Fiber 7. Karl 10 Space 11 Inner surface 12 Outer surface 15 First end 16 Second end 17 Communication part (gap) 50 Band 52 Rod-shaped body

Claims

1. A fiber unit having a plurality of fibers, The plurality of fibers have a space therein and a cross-sectional shape extending to surround the space, The plurality of fibers have different bending stiffness depending on the bending direction, and have directional bending ease, The plurality of fibers are bent in a direction that is easy to bend, The artificial hair, wherein the fiber unit has at least three curls each bent in a different direction.

2. The fiber has a cross-sectional shape having a first end portion and a second end portion at ends in a circumferential direction, The artificial hair according to claim 1 , wherein the first end and the second end are in contact with each other or have a gap of more than 0 μm and not more than 15 μm therebetween.

3. Among the plurality of fibers, there is a fiber in which the gap is formed, The gap extends in a longitudinal direction of the fiber, The artificial hair according to claim 2 , wherein the space communicates with the outside through the gap.

4. The artificial hair according to any one of claims 1 to 3, wherein the fibers are made of acrylic fibers.

5. 5. The artificial hair according to claim 4, wherein the fibers are composed of modacrylic fibers.

6. The artificial hair according to any one of claims 1 to 5, further comprising a base portion which supports the fiber unit and can be attached to a user's head.

7. The artificial hair according to any one of claims 1 to 6, wherein the fiber has a cross section in which the diameter of the smallest inclusive circle of the outer circumferential surface is 70 µm or more and 100 µm or less.

8. The artificial hair according to any one of claims 1 to 7, wherein the fiber has a cross section in which the diameter of the maximum encompassing circle of the inner circumferential surface is 15 µm or more and 50 µm or less.

9. The artificial hair according to any one of claims 1 to 8, wherein the fiber has a cross section in which the maximum distance between the inner peripheral surface and the outer peripheral surface is 15 µm or more and 40 µm or less.

10. A method for producing artificial hair according to any one of claims 1 to 9, a band-shaped body forming step of connecting a plurality of fibers at a connecting portion to form a band-shaped body; a heating step of winding the strip around a rod-shaped body and heating the strip; a removing step of removing the strip from the rod; A method for producing artificial hair, comprising the steps of sewing the belt-shaped body to a base part in this order.

11. The method for producing artificial hair according to claim 10, further comprising an external force applying step of applying an external force to the belt-shaped body.

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