KR20070094661A - Artificial hair and wig using the same - Google Patents

Abstract

An artificial hair which is closely similar to natural hair in appearance, touch and feeling such as texture and has favorable physical data close to natural hair and a wig using this artificial hair. This artificial hair (1) has a core/sheath structure consisting of a core part (1B) and a sheath part (1A) covering the core part (1B). By using a polyamide resin, in particular, a semiaromatic polyamide resin for the core part (1B) and a polyamide resin, in particular, a straight-chain saturated aliphatic polyamide having a lower bending rigidity than the core part (1B) as the sheath part (1A), for example, the bending rigidity close to natural hair can be obtained. Moreover, changes and behaviors of the artificial hair depending on humidity change can be controlled in such a manner closely similar to natural hair. By using this artificial hair, therefore, it is possible to provide a wig having a natural feeling and an excellent appearance.

Description

Artificial Hair and Wigs with Artificial Hair {ARTIFICIAL HAIR AND WIG USING THE SAME}

The present invention relates to artificial hair having similar physical properties and texture to natural hair, and to a wig using the artificial hair.

Although wigs have been manufactured and used habitually from natural hair as a material, in recent years, synthetic fibers have been manufactured into wig hair materials due to limitations in procurement of natural hair materials and other problems. In that case, the synthetic fiber to be used is basically selected based on the sensory phase, the physical phase, and close to natural hair as the first target.

As the artificial hair material to be used, there are many synthetic fibers such as acrylic, polyester, and polyamide, but in general, acrylic fibers have a low melting point and poor heat resistance. When exposed to hot water, there is a weak point such as setting of curl or the like collapses. Although polyester fiber is a material excellent in strength and heat resistance, in addition to its extremely low hygroscopicity and high bending stiffness value compared to natural hair, for example, it has a different appearance, feel, and physical properties from natural hair in a high humidity environment. It shows remarkable discomfort when using it as a wig.

Here, the rigidity for bending is a property value related to the feel of the fiber, texture, etc., which can be quantified by the Kawabata method, and is a property value widely recognized in the textile fabric industry ( See Non-Patent Document 1). The apparatus which can measure the bending rigidity value of one fiber or hair is also developed (refer nonpatent literature 2). This bending stiffness value, also called bending strength, is defined as the reciprocal of the curvature change that occurs when a unit size bending moment is applied to artificial hair. The larger the flexural stiffness value of artificial hair, the less it flexes and the more resistant to bending, the more artificial hair is stiff and difficult to bend. Conversely, the smaller this bending stiffness value is, the easier it is to bend and can be said to be soft artificial hair.

By the way, since the polyamide-based fiber can provide appearance and physical properties close to natural hair in many respects, it is conventionally provided for practical use as hair for wigs, and in particular, manufactured by the present applicant who erases unnatural luster by surface treatment. An excellent wig is provided by the invention of the method (see Patent Document 1: Japanese Patent Application Laid-Open No. 64-6114).

Polyamide fibers include linear saturated aliphatic polyamides in which only methylene chains are connected by amide bonds as main chains, such as nylon 6 and nylon 66, and semiaromatic polyamides in which phenylene units are contained in the main chain, for example , Nylon 6T of Toyo Spinning Co., Ltd., MXD6 of Mitsubishi Gas Chemical Co., Ltd., etc. are mentioned. Patent Document 1 discloses artificial hair treated with nylon 6 fibers as a material, but the nylon 6 fibers alone have lower flexural rigidity values as properties related to texture such as touch and texture, and are therefore lower than that of natural hair. It is difficult to produce artificial hair of a quality such as natural hair.

On the other hand, artificial hair using nylon 6T, on the contrary, has a higher flexural rigidity value than natural hair, which makes it difficult to produce hair of the same quality as natural hair by nylon 6T. Therefore, although it is considered to produce fibers exhibiting flexural stiffness close to natural hair by kneading spinning of nylon 6 and nylon 6T, these two types of resins have a large melting point difference, and the melting temperature of nylon 6T having a high melting point can be adjusted. When set, nylon 6, which has a low melting point and relatively low heat resistance, is excessively restricted in terms of the manufacturing process, such as being degraded by thermal oxidation during melting. Therefore, the said nylon 6T is not put to practical use as a hair material.

As a method of utilizing the characteristics of two kinds of resins, fibers of a sheath / core structure are known. This fiber constitutes one fiber from the fiber which becomes a core and the sheath-shaped fiber surrounding this core fiber, and utilizes the characteristic of each of two different types of resin, and it is a general fiber and the artificial hair material for wigs It is to be. For example, Japanese Patent Laid-Open No. 2002-129432 discloses a fiber having a sheath / core structure made of vinylidene chloride, polypropylene, and the like, and Japanese Patent Laid-Open No. 2005-9049 in Patent Document 3 Although it is a polyamide type, the fiber modified by mix | blending a protein bridge | crosslinking gel in a core part is disclosed.

In addition, when the clarity of ordinary synthetic fibers is used as artificial hair, in order to prevent unnatural glossiness, the appearance is close to natural hair, such as forming (giving) irregularities on the surface to make artificial hair opaque, Attempts to give a texture have been diversified. In the said patent document 1, unevenness | corrugation is formed by generating and growing a spherical crystal on the surface, and in Unexamined-Japanese-Patent No. 2002-161423 of patent document 4, the surface of a fiber is chemical-treated, and an unevenness | corrugation is performed on the surface. A method of forming is disclosed. In addition to this, a method of blast-treating the surface of artificial hair with fine powders such as sand, ice, and dry ice is also known. Patent Document 1: Japanese Patent Application Laid-Open No. 64-6114

Patent Document 2: Japanese Patent Application Laid-Open No. 2002-129432

Patent Document 3: Japanese Patent Application Laid-Open No. 2005-9049

Patent Document 4: Japanese Patent Application Laid-Open No. 2002-161423

Non-Patent Document: Hide Kawabata, Textile Machinery Society Magazine (Textile Engineering), 26, 10, pp.721-728, 1973

Non-Patent Document 2: Kato Tech Co., Ltd., KES-SH Single Hair Bending Tester-Instruction Manual

Artificial hair used in a wig is required to have a texture (appearance, feel, texture) and physical property values close to natural hair first, and ideally, have excellent physical property values than natural hair. As mentioned above, various synthetic fiber materials have their respective characteristics and weaknesses, and among them, specific polyamide fibers, especially nylon 6 and nylon 66, have been put to practical use because of their superior properties, but the flexural rigidity values are higher than those of natural hair. There is a problem of being low.

In view of the above problems, an object of the present invention is to provide an artificial hair having a texture (appearance, feel, texture) and physical properties close to natural hair and a wig using the same.

As a result of overlapping studies, the inventors made use of the characteristics of the polyamide-based synthetic fibers to make the core portion a polyamide fiber having a higher bending rigidity, and the sheath portion a polyamide fiber having a lower bending rigidity than the core portion. That is, artificial hair having a texture (appearance, feel, texture) and property values very close to natural hair by utilizing the characteristics of both resins with the fibers of the core and the structure composed of the sheath-shaped fibers surrounding the core fibers. As a result, the inventors of the present invention have completed the present invention.

In order to achieve the above object, the artificial hair of the present invention has a sheath / core structure composed of a core portion and a sheath portion covering the core portion, wherein the core portion is made of a polyamide resin, and the sheath portion has a lower flexural rigidity than the core portion. It is characterized by consisting of an amide resin.

In the above configuration, preferably, the surface of the artificial hair is polished with fine concavo-convex portions. The fine concave-convex portion may be spherical and / or blasted. Preferably, the core portion consists of a semiaromatic polyamide resin and the sheath portion consists of straight chain saturated aliphatic polyamide. The semi-aromatic polyamide is an alternating copolymer of hexamethylenediamine and terephthalic acid, or an alternating copolymer of metha xylenediamine and adipic acid, and the linear saturated aliphatic polyamide is a caprolactam ring-opening polymer, And / or an alternating copolymer of hexamethylenediamine and adipic acid. The sheath / core weight ratio of the sheath portion and the core portion is preferably 10/90 to 35/65. Artificial hair may contain the pigment and / or dye.

The artificial hair of the present invention has a double structure of the core portion and the sheath portion surrounding it, and since the sheath portion and the core portion are formed of polyamide resin having different bending stiffness, the hair is very close to the bending stiffness value of natural hair with respect to humidity change. Artificial hair exhibiting an aspect may be provided. Therefore, since the flexural stiffness value is close to that of natural hair, this artificial hair can provide natural artificial hair whose texture, appearance, texture, and texture are very close to natural hair. It is possible to obtain artificial hair that is changed and exhibits a pattern close to human hair.

According to the wig of the present invention, a wig base and an artificial hair attached to the wig base, wherein the artificial hair has a sheath / core structure composed of a core part and a sheath part covering the core part, and the core part is made of a polyamide resin. It is characterized in that the artificial hair made of a polyamide resin having a lower flexural rigidity than the core portion of the sheath portion is used.

By using the artificial hair of the said structure for the wig of this invention, the wig which shows the aspect very close to the bending rigidity value of a natural hair with respect to a humidity change can be provided. Therefore, according to this wig, the hair standing of the artificial hair is good and the bending stiffness value is close to that of natural hair. In particular, the appearance, the feel, the texture, and the like are very excellent, so that a natural wig can be obtained. . Therefore, the bending stiffness changes according to temperature and humidity, and artificial hair exhibiting a pattern close to human hair gives an appearance as if it were magnetic hair naturally grown from the head, and the wig user would not be exposed to the wig.

FIG. 1: shows the structure of the artificial hair which concerns on 1st Example of this invention typically, FIG. 1 (A) is a perspective view, FIG. 1 (B) is a vertical sectional view of the length of an artificial hair.

2 is a longitudinal cross-sectional view schematically showing the configuration of a modification of the artificial hair of the present invention.

3 is a schematic view of a spinning machine for use in the manufacture of artificial hair of the present invention.

4 is a schematic cross-sectional view of a discharge port used for a radiator.

5 is a perspective view schematically showing the configuration of a wig using artificial hair according to a second embodiment of the present invention.

FIG. 6 is an enlarged view schematically showing an aspect of the humidity change of the wig of FIG. 5, FIG. 6 (A) shows a normal humidity state, and FIG. 6 (B) shows a high humidity state.

FIG. 7 is a diagram showing the stretching ratio dependence of the bending stiffness value in the artificial hair of Example 3. FIG.

FIG. 8 is a view showing an electron microscope image of a cross section of artificial hair according to Example 2. FIG.

9 is a diagram showing an electron microscope image of the surface of artificial hair according to Example 2. FIG.

FIG. 10 is a view showing an electron microscope image of a cross section of artificial hair according to Example 3. FIG.

11 is a view showing a cross-sectional electron microscope image of an artificial hair having a sheath / core structure of Comparative Example 3. FIG.

It is a graph which shows the humidity dependence of the bending rigidity value of artificial hair in Examples 1-5 and Comparative Examples 1 and 2. FIG.

13 is a graph showing the humidity dependence of the bending stiffness values of artificial hairs in Examples 6 to 10 and Comparative Examples 1, 4 and 5. FIG.

Fig. 14 (A) is a view showing a state of being immersed in water, respectively, of artificial hair of an embodiment of the present invention, Fig. 14 (B) is natural hair, and Fig. 14 (C) is artificial hair using a conventional polyester.

Fig. 15 (A) is a diagram showing a state of being immersed in water, respectively, of artificial hair of an embodiment of the present invention, Fig. 15 (B) of natural hair, and Fig. 15 (C) of artificial hair using a conventional polyester.

Fig. 16 (A) is a diagram showing a dry state after immersion in water, respectively, of artificial hair of an embodiment of the present invention, Fig. 16 (B) of natural hair, and Fig. 16 (C) of artificial hair using conventional polyester. .

<Description of Drawing>

DESCRIPTION OF SYMBOLS 1: Artificial hair 1A: Sheath part 1B: Core part 1C: Fine uneven part

10: artificial hair having fine irregularities on the surface

21: first melter 22: second melter

21 A, 22 A: molten resin composition

21B, 22B: Gear Pump

23: discharge part 23A: outer ring discharge port 23B: center discharge port 23C: discharge port

24: hot bath 25: first stretching roll 26: first drying heat

27: 2nd extending | stretching roll 28: 2nd dry heat bath

29: third stretching roll 30: third drying heat bath

31: oiling device 32: fourth stretching roll

33: blast 34: winder

40: Wig using artificial hair 41: Wig base

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the artificial hair according to the first embodiment of the present invention will be described.

FIG. 1: shows the structure of the artificial hair which concerns on 1st Example of this invention typically, FIG. 1 (A) is a perspective view, FIG. 1 (B) is a vertical sectional view of the length of an artificial hair. As shown in the figure, the artificial hair 1 of the present invention has a sheath / core structure whose surface is the sheath portion 1A and which has the core portion 1B inside the sheath portion 1A. Although the sheath / core structure has shown the example provided in substantially concentric shape in the case of illustration, both the core part 1B and the sheath part 1A are heterogeneous shapes other than substantially concentric shape, for example, completely concentric circles. This also includes the case where the core is eccentric with respect to the sheath portion. It is also possible to have a sheath / core shape in which the core is approximately perfect circle and the sheath portion has a different thickness. The cross-sectional shape of the artificial hair 1 may be a circle, an elliptic, an eyebrow shape, or the like.

As the polyamide resin serving as the material of the core portion 1B, a semi-aromatic polyamide resin preferably having high strength and flexural rigidity can be used. As such a semi-aromatic polyamide, a polymer (for example, nylon 6T) consisting of alternating copolymers of hexamethylenediamine represented by the formula (1) and terephthalic acid, or adipic acid represented by the formula (2) and meta And polymers (for example, nylon MXD6) in which xylenediamine is alternately bonded with an amide bond.

As the polyamide resin serving as the material of the sheath portion 1A, a polyamide resin having a lower bending rigidity than that of the core portion 1B may be used. For example, a linear saturated aliphatic polyamide can be preferably used. have. As such a straight-chain saturated aliphatic polyamide, a polymer composed of a ring-opening polymer of caprolactam represented by the formula (3), for example, nylon 6, or an alternating air of hexamethylenediamine represented by the formula (4) and adipic acid The polymer which consists of copolymers, for example, nylon 66 etc. is mentioned.

In the artificial hair 1 of the present invention, glossiness occurs when the surface of the sheath portion 1A is a smooth surface. What is necessary is just to perform a so-called polishing process in order to remove the unnatural glossiness on the surface of this artificial hair 1.

2 is a cross-sectional view in the longitudinal direction that schematically shows a configuration of a modification of the artificial hair of the present invention. As shown in the figure, fine uneven portions 1C are formed on the surface of the sheath portion 1A of the artificial hair 10. In the case where such fine uneven portions 1C are formed, diffuse reflection occurs when the artificial hair 10 is irradiated with light. Therefore, glossiness no longer occurs due to reflection by light irradiation on the surface of the artificial hair, so-called soothing effect occurs.

Here, the fine uneven part 1C can give the fiber during or after the spinning of the artificial hair 1 by blasting with fine powder such as sand, water or dry ice. In the case of forming during the spinning of the artificial hair 1, a spherical well may be formed on the outermost surface of the artificial hair 1. At this time, the treatment may be a combination of spherical crystal formation and blast treatment with fine powder such as sand, water and dry ice. The uneven portion formed by such a combination with a spherical crystal or a blast treatment may be formed such that the uneven portion 1C is larger than the order of the visible light wavelength so that light is diffusely reflected.

The artificial hairs 10 and 10 of the present invention can be colored according to the taste of the wearer. This coloring may mix | blend a pigment and / or dye in the kneading | mixing of the polymer used as a raw material at the time of spinning, and may dye | stain artificial hair after spinning.

According to the artificial hairs 1 and 10 of the present invention, a sheath using polyamide having a high bending rigidity for the core portion 1B and a polyamide having a lower bending rigidity than the core portion 1B for the sheath portion 1A. By setting the core structure, the bending stiffness changes according to temperature and humidity, and thus, artificial hair showing an aspect close to human hair can be obtained. Moreover, the artificial hair 10 in which the fine uneven | corrugated part 1C was formed in the surface of the sheath part 1A has a polishing effect, and therefore is closer to the physical-property value and feel of an artificial hair.

Next, the manufacturing method of the artificial hair of this invention is demonstrated.

Fig. 3 is a schematic diagram of a spinning machine for use in the manufacture of artificial hair of the present invention, and Fig. 4 is a schematic cross-sectional view of the discharge unit used for the spinning machine. As shown in FIG. 3, the spinning machine 20 has the 1st melting tank 21 of the polyamide resin used as the sheath part 1A, and the 2nd melting tank of the polyamide resin used as the core part 1B ( 22, the discharge part 23 which discharges the melt liquid 21A, 22A supplied from these melting tanks 21, 22, and the yarn-like melt discharged from the discharge port 23C of the discharge part 23 And the three steps of the stretching heat treatment step consisting of the stretching bath (25, 27, 29) and the dry heat tank (26, 28, 30), and then, each step is a warm bath (24) for solidifying the Through the part, the blast machine 33 for forming the uneven | corrugated part 1C on the yarn surface, and the winding machine 34 which winds the artificial hair polished to the desired degree by the blast machine 33 are comprised.

The melting tanks 21 and 22 are equipped with a heating apparatus for melting pellets of polyamide resin, screws for supplying to the kneading and discharging portion 23, and the like, and the melted liquids 21A and 22A. ) Is provided with gear pumps 21B and 22B for supplying to the discharge part 23.

The fiber from the discharge port 23C of the discharge part 23 passes through a hot bath, elongation, and a dry heat mechanism as shown, and then tensions the artificial hair to stabilize the dimensions with the antistatic oil ring device 31. It winds around the winding machine 34 via the extending | stretching roll 32 which relaxes | cures, and the blasting machine 33 for surface treatments.

As shown in FIG. 4, the discharge part 23 has the double discharge port provided concentrically, From the center circle part 23B, the semi-aromatic polyamide resin melt 22A, and the center circle part 23B. ), Each of the straight chain saturated aliphatic polyamide resin melts 21A is discharged from the outer ring portion 23A surrounding the ().

Next, the manufacturing method of the artificial hair by the said radiator 20 is demonstrated.

By using the spinning machine 20, in the melting tanks 21 and 22, each polyamide resin is melted at a temperature suitable for each, and the liquid is fed to the discharge portion 23, and the center circle portion 23B of the discharge port is discharged. 22A of semi-aromatic polyamide resin melts and 21A of linear saturated aliphatic polyamide resin melts from 23 C of outer ring parts are discharged from the discharge port 23C, and it is set as the seal | sticker of a sheath / core structure. Artificial hair 1, 10 can be produced.

At this time, the ratio of the capacity | capacitance which sent 21 A of linear saturated aliphatic polyamide resin melts with the gear pump 21B, and the capacity | capacitance which sent the semi-aromatic polyamide resin melt 22A with the gear pump 22B, In this invention, it shall be called a sheath / core capacity ratio. As will be described later, in order to bring the flexural rigidity value of the artificial hair 10 closer to the flexural rigidity value of the natural hair, the sheath / core weight ratio, which is the weight ratio of the sheath and the core, is in a preferred range of 10/90 to 35/65. . As a manufacturing condition for obtaining the weight ratio of this sheath and a core, 1 / 2-1 / 7 becomes a preferable value as a sheath / core capacity ratio, and this range is mentioned, such as the bending rigidity value of the artificial hair (1, 10) mentioned later. It is very suitable for physical properties. When the sheath / core capacity ratio is larger than 1/2, that is, when the ratio of the sheath portion 1A is large, the effect of contributing to the increase in the bending stiffness value of the core portion 1B of the artificial hairs 1 and 10 becomes small. . On the other hand, when the sheath / core capacity ratio is smaller than 1/7, that is, when the ratio of the core portion 1B is large, the bending stiffness value becomes excessively large and does not become close to natural hair, which is not preferable.

The draw ratio at the time of spinning of the artificial hairs 1 and 10 can be 5 to 6 times. This draw ratio is about 2 times the draw ratio of the conventional artificial hair of nylon 6 alone. In the artificial hair 1, 10 of this invention, the draw ratio at the time of spinning, the diameter of a thread, the bending rigidity value, etc. can be set suitably according to a desired design. In this case, the shape of the sheath / core of the artificial hairs 1 and 10 can be made into a substantially concentric shape by appropriately controlling the conditions during spinning.

In the spinning for artificial hair according to the present invention, the thread taken out from the discharge port 23C is passed through the water in the warm bath 24 in water of 80 ° C. or higher, so that the uneven portion 1C is formed on the surface of the linear saturated aliphatic polyamide resin of the sheath portion 1A. It is possible to produce artificial hair 10 as a polishing to generate and grow, to give the yarn an appearance like natural hair, and to erase unnatural luster.

As a method of imparting (forming) the fine concavo-convex portion 1C to the surface of the yarn, in addition to the growth of the above-mentioned Chinese New Year, a method of blasting the yarn surface after spinning with fine particles such as sand, water, or dry ice, or chemically treating the yarn surface You may use the method of any of the processes, or the method of combining these suitably.

In order to impart a preferable color and appearance as the artificial hairs 10 and 10, pigments and / or dyes may be blended at the time of spinning, or the artificial hairs 1 and 10 themselves may be dyed after the spinning is finished.

As described above, since the artificial hairs 1 and 10 of the present invention have a sheath / core structure made of a polyamide resin having different bending stiffness, the artificial hairs 1 and 10O have higher bending stiffness than artificial hair of a conventional straight-chain saturated aliphatic polyamide resin unit. The artificial hairs 1 and 10 can be manufactured with good reproducibility. Moreover, by forming fine uneven | corrugated parts 1C on the surface of the artificial hair 1, natural gloss close to natural hair can be provided and natural appearance as hair can be provided.

Next, a wig using artificial hair according to the second embodiment of the present invention will be described.

5 is a perspective view schematically showing the configuration of a wig using artificial hair according to a second embodiment of the present invention. The wig 40 using the artificial hairs 1 and 10 of the present invention is a wig formed by attaching the artificial hairs 1 and 10 to the wig base 41. The wig base 41 can be comprised with a net type base or an artificial skin base. In the case of illustration, the wig base 41 has shown the state attached to the mesh (mesh) of a net member. The wig base 41 may be configured by combining a net type base and an artificial skin base, and the wig base 41 is not particularly limited as long as the wig base 41 is suited to the design and use of the wig.

The diameters of the artificial hairs 1 and 10 may be about 0.1 mm to about 0.1 mm. In addition, relative-specular glossiness of artificial hair is suppressed, and artificial hair 10 having gloss close to natural hair can be preferably used. What is necessary is just to select the color of the artificial hair 1 and 10 suitably, such as black, brown, a blond, according to a wearer's request. The use of artificial hair of a color matched with the magnetic hair color around the user's bald area increases natural feeling. In the case of fashionable wigs or hair extensions, the artificial hair of the present invention may be meshed with a color different from that of the magnetic hair, or the artificial hair may be changed from the proximal end to the proximal end, for example, by changing the color tone of the hue. Alternatively, the color may be gradually changed to perform gradation.

FIG. 6 is an enlarged view schematically showing an aspect of the humidity change of the wig of FIG. 5, FIG. 6A shows a normal humidity state, and FIG. 6B shows a high humidity state. In the figure, the case where artificial hair is a straight hair is shown.

As shown in Fig. 6A, the artificial hairs 1 and 10 attached to the wig 40 of the present invention have a bending stiffness value close to that of natural hair. Therefore, under normal conditions of about 40% to 60% humidity, the artificial hairs 1 and 10 can stand up well and the wig 40 has a sense of volume.

On the other hand, when the wig 40 of the present invention is wet with rain or the wig is mounted in a high humidity environment, the bending stiffness value due to moisture absorption of the artificial hairs 1 and 10 attached to the wig changes. In other words, when the flexural rigidity value decreases as the humidity increases, artificial hair becomes softer, and as shown in FIG. In addition, when the absorbed moisture is dampened by natural neglect or drying, the artificial hairs 1 and 10 rise gradually and return to their original state.

When curls are applied to the artificial hairs 1 and 10, the curls are stretched similarly to natural hairs, and similarly to the case of the straight hairs, if the absorbed moisture is dampened by natural neglecting or drying, the curls are original. Return to

According to the wig 40 of the present invention, a sheath / core structure using polyamide having high bending rigidity as the core portion 1B and polyamide having lower rigidity than the core portion 1B as the sheath portion 1A is used. Artificial hair (1, 10) is used. Since this is attached to the base of the wig, the bending stiffness is changed depending on the temperature and the humidity, and the wig of a good appearance can be obtained with the feel and the aspect closer to that of natural hair. Moreover, when fine uneven | corrugated part 1C is formed in the surface as artificial hair, the external appearance which is more natural hair is exhibited by a polishing effect.

In addition, when the wig 40 of the present invention is wet with rain or water is provided by the wearer's sweat, the artificial hairs 1 and 10 use polyamide resin having good hygroscopicity to absorb moisture, The artificial hairs 1 and 10 sag downward due to the increase in weight thereof, and exhibit an aspect close to natural hair. On the other hand, for example, in the case of a wig using a conventional artificial hair made of polyester, the flexural rigidity is higher than that of natural hair, so that the magnetic hair that has been blended with the wig and the artificial hair of the wig have moisture By adhesion, magnetic hair sags to the scalp side, whereas artificial hair of polyester remains up, and separation of artificial hair and magnetic hair of a wig made of polyester occurs, resulting in an unnatural appearance. However, in the present invention, the hair of the wig sags substantially in the same manner as the magnetic hair sag when moisture is attached, so that no separation of the hair occurs, and thus the magnetic hair and the artificial hair can be kept in a well-blended state.

Example  One

Next, the Example of this invention is described in detail.

The artificial hair 10 of Example 1 was manufactured using the spinning machine 20 shown in FIG. As polyamide resin of core part 1B, nylon 6T (made by Toyo Spinning Co., Ltd.) was used, and nylon 6 (made by Toyo Spinning Co., Ltd.) was used as polyamide resin of sheath part 1A. The warm bath 24 used 80 degreeC hot water. The sheath / core capacity ratio set the discharge port temperature to 310 ° C. as 1/7 to manufacture artificial hair 10. The sheath / core weight ratio of the artificial hair 10 of this Example 1 was 12/88.

As the colorant, resin chips made by mixing the polyamide resin and the pigment used for the sheath portion 1A or the core portion 1B and the pigment at a predetermined ratio, heating and melting, and cooling the mixture after kneading were used as chips. . The resin chip used as this coloring agent is called a master batch. As the master batch used in the examples, a resin chip containing 3% by weight of black inorganic pigment, a resin chip containing 3% by weight of yellow organic pigment, and a resin chip containing 4% by weight of red organic pigment were used.

Specifically, first, in the first melting tank 21, 84 g of nylon 6 chips as the raw material of the sheath portion 1A, 5 g of black, 10 g of yellow, 1 g of red, and 100 g in total are melted as a master batch. Resin 21A was added. The molten resin 22A having a total weight of 84 g of nylon 6T chip 84g, black 5g, yellow 10g, red 1g, and 100g in total was introduced into the second melting tank 22 as the raw material of the core portion 1B.

In the gear pump 22B, nylon 6T is sent out to the center discharge port 23B of the discharge part 23, and in the gear pump 21B, nylon 6 is sent out to the outer ring discharge port 23A, and the gear pumps 21B and 22B are provided. The rotation speed of was adjusted to set the extrusion capacity ratio to 1/7 by the sheath / core ratio. The spinning machine is a machine that discharges fifteen fibers through the outlet of the hole 15.

The fiber of the sheath / core structure which exited the discharge port 23C passed through the hot bath 24 which consists of hot water of 80 degreeC and 1.5 m in length, and formed the spherical well on the surface.

Thereafter, stretching is performed by passing the first stretching roll 25 and the first drying heat tank 26 at 180 ° C, and through the second stretching roll 27 and the second drying heat bath 28 at 180 ° C. After heat-set and further heat treatment (annealing) to stabilize the diameter dimension of the yarn through the third stretching roll 29 and the third drying heat tank 30 at 185 ° C, The oiling device 31 was passed.

In the final process, the fine alumina powder was blown out on the surface through the fourth stretching roll 32 and the blast group 33 to roughen the fiber surface, and then wound on the winding machine 34. In this step, the speeds of the stretching rolls 25, 27, 29, 32 from the first stretching roll to the fourth stretching roll were adjusted so that the draw ratio was 5.5 times and the winding speed was 150 m / min.

The diameters of the manufactured artificial hair 10 were 40 micrometers-80 micrometers in all. In Example 1, the draw ratio was 5.5 times, but as shown in Example 3 described later, the flexural rigidity of the artificial hair 10 can be adjusted from the draw ratio.

Example  2

The artificial hair 10 which consists of a sheath / core structure was manufactured on the conditions similar to Example 1 except having adjusted each gear pump 21B, 22B to the sheath / core capacity ratio to 1/5. The artificial hair 10 sheath / core weight ratio of this Example 2 was 16.1 / 83.9.

Example  3

The artificial hair 10 which consists of a sheath / core structure was manufactured on the conditions similar to Example 1 except having adjusted each gear pump 21B, 22B to make the sheath / core capacity ratio 1/3. The sheath / core weight ratio of the artificial hair 10 of this Example 3 is 24.2 / 75.8, and the diameter is 80 micrometers.

FIG. 7: is a figure which showed the draw ratio dependence of the bending rigidity value in the artificial hair 10 of Example 3. FIG. In the figure, the horizontal axis represents the draw ratio, and the vertical axis represents the bending rigidity value (10 ⁻⁵ gfcm ² / piece). Measurement conditions are temperature 22 degreeC and humidity 40%. As apparent from FIG. 7, the bending stiffness values of the draw ratios of 3 times and 5.5 times are 430 × 10 ⁻⁵ gfcm ² / pieces and 720 × 10 ^-5 gfcm ² / pieces, respectively, and the draw ratio increases. It was found that the flexural stiffness value increased linearly.

Example  4

The artificial hair 10 which consists of a sheath / core structure was manufactured on the conditions similar to Example 1 except having adjusted each gear pump 21B, 22B to the sheath / core capacity ratio. The sheath / core weight ratio of the artificial hair 10 of this example 4 is 32.3 / 67.7.

Example  5

Except having used the nylon 66 (made by Mitsubishi Engineering Plastics Co., Ltd.) as the polyamide resin of the sheath part 1A, the warm bath 24 was 92 degreeC, and the discharge port temperature was set to 320 degreeC, Under the same conditions, the artificial hair 10 of Example 5 was manufactured. The sheath / core weight ratio of the artificial hair 10 of this Example 5 is 16.2 / 83.8.

Table 1 shows the conditions for producing artificial hairs of Examples 1 to 5. Here, the diameters of the manufactured artificial hair 10 were 40 micrometers-80 micrometers in all.

Example  6

The polyamide resin of the core part 1B is nylon MXD6 (made by Mitsubishi Gas Chemical Co., Ltd., brand name MX nylon), and the polyamide resin of the sheath part 1A is nylon 6 (made by Mitsubishi Engineering Plastics Co., Ltd.) The artificial hair 10 of Example 6 was manufactured on the conditions similar to Example 1 except having set the discharge port temperature to 270 degreeC and setting the sheath / core capacity ratio to 1/7. The sheath / core weight ratio of the artificial hair 10 of this Example 6 was 11.8 / 88.2. In the artificial hair 10 of this Example 6, nylon MXD6 was used instead of nylon 6T used for the core portions 1B of Examples 1 to 5. However, it extended | stretched using the 95 degreeC wet heat tank instead of the 1st dry heat tank 26 of Example 1, and heat-set the 2nd dry heat tank 28 at 150 degreeC. Thereafter, the third drawing roll 29 and the third drying heat tank 30 at 185 ° C. are passed to perform heat treatment (annealing) to stabilize the diameter of the yarn, and then to the oil ring device 31 for preventing electrostatic discharge. Passed. The final step of roughening the fiber surface which becomes artificial hair was performed similarly to Example 1. In this process, the draw ratio was 5.6 times and the speed of the draw rolls 25, 27, 29, 32 from the 1st draw roll to the 4th draw roll was adjusted so that a winding speed might be 150 m / min (min). Here, the diameters of the manufactured artificial hair 10 were 40 micrometers-80 micrometers in all.

Example  7

The artificial hair 10 of Example 7 was manufactured on the conditions similar to Example 6 except having made the sheath / core capacity ratio into 1/5. The sheath / core weight ratio of the artificial hair 10 of this Example 7 was 15.8 / 84.2.

Example  8

The artificial hair 10 of Example 8 was manufactured on the conditions similar to Example 6 except having made the sheath / core capacity ratio into 1/4. The sheath / core weight ratio of the artificial hair 10 of this Example 8 was 18.9 / 81.1.

Example  9

The artificial hair 10 of Example 9 was manufactured on the conditions similar to Example 6 except having made the sheath / core capacity ratio 1/3. The sheath / core weight ratio of the artificial hair 10 of this Example 9 was 23.8 / 76.2.

Example  10

The artificial hair 10 of Example 10 was manufactured on the conditions similar to Example 6 except having made the sheath / core capacity ratio into 1/2. The sheath / core weight ratio of the artificial hair 10 of this Example 10 was 31.8 / 68.2. Table 2 shows the production conditions of Examples 6 to 10. The diameter of the artificial hair 10 manufactured here was 40 micrometers-80 micrometers in all.

Next, the artificial hair of a comparative example is demonstrated.

(Comparative Example 1)

Discharge port temperature was set to 270 ° C using the same spinner as in Example 1, except that the first melting tank 21 was not used, and a sheath-free structure had a diameter of 80 µm and a draw ratio of 3.3. Prepared.

(Comparative Example 2)

Discharge port temperature was 310 degreeC using the same spinning machine as Example 1, but without the 1st melting tank 21, without a sheath, 80 micrometers of diameters of the yarn of nylon 6T, and the draw ratio 5.5 Prepared.

(Comparative Example 3)

Using the same spinning machine as in Example 1, the core portion 1B was made of polyester (manufactured by Toray Corporation), the sheath portion 1A was made of nylon 6, the discharge port temperature was set at 290 ° C, and the sheath / core was The capacity ratio was 1/1, the diameter of the thread was 80 micrometers, and the yarn of draw ratio 5.5 was produced.

(Comparative Example 4)

The same conditions and methods as those in Example 6 were used except that the discharge port temperature was set to 270 ° C. and the first melting tank 21 was not used, and the sheathless structure was used. The yarn which consists of nylon MXD6 of 80 micrometers in diameter of a thread, and draw ratio 5.6 was manufactured.

(Comparative Example 5)

The same conditions and methods as those in Example 6 were used except that the discharge port temperature was set to 270 ° C. and the first melting tank 21 was not used, and the sheathless structure was used. The yarn which consists of mixed polyamide of nylon MXD6 and nylon 6 of 80 micrometers in diameter, and draw ratio 5.6 was produced. The weight ratio of nylon MXD6 and nylon 6 was 90:10. The pigment mixing ratios of Comparative Examples 1 to 5 were the same, and the mixing ratios of black, yellow, and red were 0.15%, 0.30%, and 0.04%, respectively. The manufacturing conditions are shown in Table 3.

Next, the reason why nylon 6T or MXD6 is used for the core portion 1B of the artificial hair 10 of Example 1 and nylon 6 is used for the sheath portion 1A will be described.

Table 4 is a table which shows the humidity dependence of the flexural rigidity value at 22 degrees C of the artificial hair manufactured using the nylon 6 of the comparative example 1, the nylon 6T of the comparative example 2, and the nylon MXD6 of the comparative example 4. The bending stiffness value was measured using the Single Hair Bending Tester (manufactured by Kato Tech Co., Ltd.) which will be described later.

As is apparent from Table 4, the flexural stiffness values of artificial hair using nylon 6 of Comparative Example 1 were 51Ox10 ^-5 gfcm ² / 34Ox10, respectively at 4O%, 6O% and 8O% humidity. ^-5 gfcm ² / pcs, 25O × 10 ^-5 gfcm ² / gaeyeotda. Although not shown in the table, the flexural rigidity value and the humidity dependence of artificial hair using nylon 66 were also the same values as those of nylon 6.

The flexural stiffness values of artificial hair using nylon 6T of Comparative Example 2 were 98O × 10 ⁻⁵ gfcm ² / piece, 920 × 10 ^-5 gfcm ² / piece, at 40%, 60%, and 80% of humidity, respectively. 860 × 10 ⁻⁵ gfcm ² / piece.

Flexural stiffness values of artificial hair using nylon MXD6 of Comparative Example 4 were 94O × 10 ^-5 gfcm ² / pieces, 870 × 10 ^-5 gfcm ² pieces, 780 at humidity 40%, 60%, and 8O%, respectively. X10 ^-5 gfcm ² / piece. From this, it turns out that the artificial hair using nylon 6T and nylon MXD6 shows the high flexural rigidity value compared with the artificial hair of nylon 6 or nylon 66.

Therefore, the artificial hair of Examples 1-10 is a polyamide resin which consists of nylon 6T or nylon MXD6 whose core part 1B has high bending rigidity, and the sheath part 1A has a bending rigidity rather than the core part 1B. It became clear that it was a polyamide resin consisting of nylon 6 or nylon 66 having a low value.

Next, various characteristics of the artificial hairs produced in Examples 1 to 10 and Comparative Examples 1 to 5 will be described.

FIG. 8 is an electron microscope image showing a cross section of the artificial hair made in Example 2. FIG. The acceleration voltage of the electron is 15 kV, and the magnification is 800 times. The sheath / core capacity ratio of this artificial hair 10 is 1/5, the diameter is 80 micrometers, and draw ratio is 5.5 times. As is apparent from the figure, the core portion 1B is composed of a semi-aromatic polyamide (nylon 6T), and the sheath portion 1A around the core portion has a cis / core structure composed of straight chain saturated aliphatic polyamide (nylon 6). It can be seen that it is formed.

9 is an electron microscope image showing the surface of the artificial hair 10 of Example 2. FIG. The acceleration voltage of the electron is 15 kV, and the magnification is 700 times. As is apparent from the figure, it can be seen that spherocrystals are generated and grown on the linear saturated aliphatic polyamide (nylon 6) on the surface, whereby fine uneven portions 1C are formed on the surface.

10 is an electron microscope image showing a cross section of the artificial hair 10 of Example 3. FIG. The acceleration voltage of the electron is 15 kV, and the magnification is 900 times. The sheath / core capacity ratio of the artificial hair 10 is 1/3, its diameter is 80 占 퐉, and the draw ratio is 5.5 times. As is apparent from the figure, the core portion 1B consists of a semiaromatic polyamide (nylon 6T), and the sheath portion 1A around the core portion has a cis / core structure composed of straight chain saturated aliphatic polyamide (nylon 6). It can be seen that it is formed.

11 is an electron microscope image showing a cross section of an artificial hair having a sheath / core structure of Comparative Example 3. FIG. The acceleration voltage of the electron is 15 kV, and the magnification is 300 times.

The artificial hair of Comparative Example 3 has a cis / core structure in which the core part 1B is made of polyester and the sheath part 1A is made of a linear saturated aliphatic polyamide (nylon 6). The sheath / core capacity ratio was 1/1, and the diameter of the yarn was 80 µm and the draw ratio was 5.5. As apparent from the figure, peeling is detected at the interface between the core portion 1B and the sheath portion 1A, the fibers fade to white, and the colored color appears to be discolored. It turns out that it is not suitable for hair.

Next, the measurement result of the bending rigidity value of the artificial hair in an Example and a comparative example is demonstrated. As described above, the flexural rigidity value is a physical property value generally applied to fibers and the like, and has been recently recognized as a physical property related to sensory properties and conditions such as texture (appearance, feel, texture) even in the case of hair. Kawabata measurement method and its principle are widely known for the measurement of the flexural rigidity of fibers, but using the improved single-hair bending tester (model KES-FB2-SH) manufactured by Kato Tech Co., Ltd. , The flexural stiffness of artificial hair was measured. As a measuring method, with respect to all of the artificial hair and the natural hair of the present invention and the comparative example, which is a sample, for one of each 1 cm, the whole hair is bent at a constant curvature in an arc at a constant speed, and thus minute The bending moment was detected and the relationship between the bending moment and curvature was measured. From this, the bending stiffness value by the bending moment / curvature change was calculated | required. Representative measurement conditions are shown below.

(Measuring conditions)

Distance between chucks: 1 cm

Torque detector: Torque detection method of torsion wire (steel wire)

Torque sensitivity: 1.Ogfcm (at full scale 10V)

Curvature: ± 2.5cm ^-1

Flexural displacement speed: 0.5cm ^-1 / sec

Measuring cycles: 1 round trip

Here, a chuck is a mechanism which clamps each said hair of 1 cm.

12 is a graph showing the humidity dependency of the flexural stiffness values of artificial hairs in Examples 1 to 5, and Comparative Examples 1 and 2; In the figure, the horizontal axis represents the humidity (%), and the vertical axis represents the bending stiffness value (10 ⁻⁵ gfcm ² / piece). The measurement temperature is 22 ° C. In FIG. 12, the humidity dependence of the bending rigidity value of the artificial hair of an Example and a comparative example is shown with the characteristic of natural hair. Since natural hair has a large individual difference, the age group collects hairs from 25 males and 38 females of each layer in their 20s to 50s, and among them, measures the bending stiffness value of a sample having a diameter of 80 μm, and averages In addition to the standard values, the maximum and minimum values are also shown in the drawings. The average value of the flexural stiffness value of natural hair is 720 × 10 ⁻⁵ gfcm ² / and 51O × 10 ^-5 gfcm ² / when the humidity is 40% and 80%, respectively, approximately monotonously with the increase in humidity. It can be seen that it exhibits a decreasing characteristic.

On the other hand, the maximum value of the flexural stiffness value of the natural hair, in the humidity of 40% and 80%, respectively 74O × 10 ^-5 gfcm ² / dog, 6OO × 10 ^-5 gfcm ² / gaeyeotda. The minimum values are 660 × 10 ^-5 gfcm ² and 42O × 10 ^-5 gfcm ² /, respectively, at 4O% and 80% of humidity, and the flexural stiffness values of natural hair are wide (deviation, wide deviation). It turned out to have.

The artificial hair 10 of Example 1 has a diameter of 80 µm and a sheath / core capacity ratio of 1/7. Under conditions of 40% humidity, the flexural rigidity value is 740 × 10 equal to the maximum value of natural hair. ^-5 and gfcm ² / dog, in accordance with the rise of the humidity, and the bending stiffness decreases gradually and a humidity of 60% to about 700 × 10 ^-5 gfcm is reduced to ² / unit, the humidity of about 8O% 65O × 10 ^-5 gfcm ^It fell to ² /.

From this result, in the case of the artificial hair 10 of Example 1, although the bending rigidity value was higher than the bending rigidity value of natural hair, the artificial hair which consists of nylon 6 of the comparative example 1 mentioned later, and the comparative example 2 Compared to the flexural stiffness values of artificial hairs made of nylon 6T, it was found to exhibit similar flexural stiffness values and humidity dependence for natural hair.

In the artificial hair 10 of Example 2, the diameter of the yarn is 80 µm, the sheath / core capacity ratio is 1/5, and under the conditions of 40% humidity, the bending rigidity value is 72Ox10 ^-5 gfcm, which is the same as that of natural hair. ^{It is 2} / piece, and the flexural rigidity value falls gradually until humidity reaches 45%, and falls to about 650 * 10 <^-5> gfgf <^2> / piece. Next, until the humidity is 45% to 60%, the bending stiffness value is constant at about 650 × 10 ⁻⁵ gfcm ² / piece. And while the humidity was 60%-80%, the bending rigidity value gradually decreased, and when the humidity was 80%, it fell to about 6OOx10 <^-5> gfgf <^2> .

From this result, in the case of the artificial hair 10 of Example 2, the flexural stiffness value of the natural hair is matched with the humidity of 40%, and the flexural stiffness value decreases with the increase of the humidity, and thus the flexural stiffness value similar to that of the natural hair. It has been found to show over-humidity dependence.

The artificial hair 10 of Example 3 differs from Example 1 in that the sheath / core capacity ratio is 1/3. In conditions of 4O% humidity, bending stiffness value, and 72O × 10 ^-5 gfcm ² / more like natural hair, the bending stiffness decreases by humidity 4O% ~ 6O%, about 52O × 10 ^-5 gfcm ² Decreases to / Next, the flexural stiffness value gradually decreased until the humidity was 60% to 80%, and the humidity became about 48Ox10 ^-5 gfcm ² / piece at 80%.

From this result, in the case of the artificial hair 10 of Example 3, the flexural stiffness value of the natural hair is consistent with the humidity of 40%, the flexural stiffness value decreases with the increase of the humidity, and even with the humidity of 80% It was found to exhibit very close flexural stiffness values.

The artificial hair 10 of Example 4 differs from Example 1 in that the sheath / core capacity ratio is 1/2. Under conditions of 4O% humidity, the flexural stiffness value is 72Ox10 ^-5 gfcm ² per piece like natural hair, and the flexural stiffness value is lowered from 4O% to 6O% humidity, about 51Ox10 ^-5 gfcm ² Decreases to / Next, the flexural stiffness value gradually decreased until the humidity was 60% to 80%, and became about 39Ox10 ^-5 gfcm ² / piece at the humidity of 80%.

From this result, in the case of the artificial hair 10 of Example 4, the flexural stiffness value of the natural hair is consistent with the humidity of 40%, the flexural stiffness value decreases with the increase of the humidity, and the flexural rigidity at the humidity of 80%. It turned out that the value shows the vicinity of the minimum value of the bending rigidity value of natural hair.

When the flexural stiffness value of the artificial hair 10 of Examples 2 to 4 shows a value lower than the flexural rigidity value of Example 1 when the humidity is 40% or more, the capacity of the sheath portion 1A is that of Example 1 This is because the capacity of the core portion 1B is larger than that of the capacity. Therefore, in the artificial hair of the present invention, it is possible to change the humidity dependency of the flexural stiffness value by changing the sheath / core capacity ratio.

Thus, in the case of the artificial hair 10 of Examples 2 to 4, at 40% of humidity, the bending stiffness value of the natural hair is consistent, and the bending stiffness value decreases with the increase of humidity, thereby having a similar humidity dependency on the natural hair. It turned out to be.

The artificial hair 10 of Example 5 differs from Example 1 in that the sheath portion 1A is made of nylon 66, and otherwise the same. In Example 5, under conditions of 40% humidity, the flexural rigidity value is 78Ox10 ^-5 gfcm ² / piece larger than that of natural hair, and the flexural rigidity value decreases approximately linearly from 4O% to 50% of humidity. At a humidity of 50%, it becomes about 65Ox10 ^-5 gfcm ² / piece. Then, the humidity is lowered by 50-80%, up to about the first embodiment the bending stiffness as the slope matching about 6OO × 10 ^-5 gfcm ² / dog.

From this result, in the case of the artificial hair 10 of Example 5, it turned out that the value which is larger than the bending rigidity value of natural hair at 40% of humidity, and the bending rigidity value decreases with increase of humidity. In the case of the artificial hair 10 of Example 5, the bending rigidity value shows a value larger than the bending rigidity value of Example 1-Example 4 in the range of 40%-50% of humidity.

Thus, in the case of the artificial hair 10 of the fifth embodiment, the flexural rigidity value close to the flexural rigidity value of the natural hair is also exhibited, and as the humidity increases, the flexural rigidity value decreases, and the flexural rigidity value similar to that of the natural hair is It has been found to indicate humidity dependence.

The artificial hair of the comparative example 1 consists of nylon 6, and the diameter of a thread is 80 micrometers, and draw ratio 3.3. In the case of such artificial hair, the flexural stiffness value was about 51Ox10 ^-5 gfcm ² / piece at a humidity of 40%, and a value of about 70% of natural hair. In addition, the flexural stiffness value decreased substantially monotonously with the increase of the humidity, and the flexural stiffness value became about 25Ox10 <^-5> gfcm <^2> / piece at the humidity of 80%. This value is about 50% of natural hair. It was found that the flexural stiffness value of Comparative Example 1 was significantly smaller than natural hair or artificial hair of Examples 1 to 5 in the measured overall humidity range.

The artificial hair of the comparative example 2 consists of nylon 6T, and the diameter of a thread is 80 micrometers, and draw ratio 5.5. In the case of artificial hair, the bending stiffness value in the humidity from about 4O% 98O × 10 ^-5 gfcm ² / dog was a large value of about 136% of natural hair. In addition, as the humidity increased, the flexural stiffness value decreased substantially monotonously, and at 80% humidity, the flexural rigidity value became about 860 × 10 ⁻⁵ gfcm ² / piece. This value is about 170% of natural hair. It was found that the bending stiffness value of Comparative Example 2 was significantly larger than natural hair and artificial hair of Examples 1 to 5 in the measured overall humidity range.

And in the case of the comparative example 3, as mentioned above, since the peeling of the sheath part 1A and the core part 1B occurs, and it cannot be used as artificial hair, the bending rigidity value was not measured.

Next, the humidity dependence of the bending rigidity value in the artificial hair of Example 6-10 is demonstrated. 13 is a graph showing the humidity dependence of the bending stiffness values of artificial hairs in Examples 6 to 10, Comparative Example 1, Comparative Example 4, and Comparative Example 5. FIG. In the figure, the horizontal axis represents the humidity (%), and the vertical axis represents the flexural rigidity value (10 ⁻⁵ gfcm ² / piece). The measurement temperature is 22 ° C. In FIG. 13, the average value, the maximum value, and the minimum value are also shown as the bending rigidity value of natural hair similarly to FIG. The artificial hair 10 of Example 6 is different from Example 1 in that the core portion 1B is made of nylon MXD6, the diameter of the yarn is 80 µm, and the sheath / core capacity ratio is 1/7.

As is apparent from FIG. 13, in the case of the artificial hair 10 of Example 6, under the condition of 40% humidity, the flexural rigidity value is 73O × 10 ⁻⁵ gfcm ² / piece, which is approximately equivalent to the average value of natural hair, and the humidity As the value increases, the bending stiffness value gradually decreases. In a humidity of 60% is reduced to about 66O × 10 ^-5 gfcm ² / dog, the humidity was decreased to about 8O% 6OO × 10 ^-5 gfcm ² / dog.

From this result, in the case of the artificial hair 10 of Example 6, the flexural stiffness value which is approximately equivalent to the flexural stiffness value of natural hair at 40% humidity is shown, and the flexural rigidity value decreases with the increase of humidity, and natural hair It was found to exhibit a similar aspect to. In other words, it was found that the artificial hair 10 of Example 6 exhibits a bending rigidity value and a humidity dependency similar to that of natural hair.

The artificial hair 10 of Example 7 differs from Example 6 in that the sheath / core capacity ratio is 1/5, and the others are the same.

As is apparent from FIG. 13, in the case of the artificial hair 10 of Example 7, under the condition of 40% humidity, the bending rigidity value is 73O × 10 ⁻⁵ gfcm ² / piece, which is approximately equivalent to the average value of natural hair, and As the humidity rises to around 50%, the flexural stiffness value is lowered, and the value is lowered to 620 × 10 ^-5 gfcm ² / piece. Next, the bending stiffness value is gradually lowered up to 6O% humidity, and becomes 61Ox10 ^-5 gfcm ² / piece at 6O% humidity. In addition, when the humidity is 60% to 80%, the bending stiffness value gradually decreases, and when the humidity is 80%, the flexural rigidity value is 560 × 10 ⁻⁵ gfcm ² / piece.

From this result, in the case of the artificial hair 10 of Example 7, the flexural stiffness value approximately equal to the flexural stiffness value of the natural hair at 40% humidity, the flexural stiffness value decreases with the increase of humidity, and natural hair It was found to exhibit a similar aspect to. In other words, it was found that the artificial hair 10 of Example 7 exhibits a flexural stiffness value and humidity dependency similar to that of natural hair.

The artificial hair 10 of Example 8 is different from Example 6 in that the sheath / core capacity ratio is 1/4, and the others are the same. As is apparent from Fig. 13, in the case of the artificial hair 10 of Example 8, under conditions of 40% humidity, it is 73Ox10 ^-5 gfcm ² / which is approximately equivalent to the average value of natural hair, and the humidity is 40% ~ The bending stiffness value falls until just before 60%, and when the humidity is about 60%, the bending stiffness value drops to 56Ox10 ^-5 gfcm ² / piece.

Next, when the humidity is 60% to 80%, the bending stiffness value gradually decreases, and when the humidity is 80%, the bending rigidity value is lowered to 490 × 10 ⁻⁵ gfcm ² / piece.

From the results, in the case of the artificial hair 10 of Example 8, the flexural stiffness value approximately equal to the flexural stiffness value of the natural hair at 40% humidity, the flexural stiffness value decreases with the increase of humidity, and the natural hair It was found to exhibit a similar aspect to.

The artificial hair 10 of Example 9 is different from Example 6 in that the sheath / core capacity ratio is 1/3, and the others are the same.

As is apparent from FIG. 13, in the case of the artificial hair 10 of Example 9, under conditions of 40% humidity, it is approximately 73Ox10 ^-5 gfcm ² / piece, which is approximately equivalent to the average value of natural hair, and the humidity is 40% to 4%. The bending stiffness value falls until just before 60%, and when humidity is about 60%, the bending stiffness value falls to 53Ox10 <^-5> gfcm <^2> / piece. Next, when the humidity is 60% to 80%, the bending stiffness value gradually decreases, and when the humidity is 80%, the bending rigidity value decreases to 440 × 10 ⁻⁵ gfcm ² / piece.

From this result, in the case of the artificial hair 10 of the ninth embodiment, the flexural stiffness value approximately equal to the flexural stiffness value of the natural hair at the humidity of 40%, the flexural stiffness value decreases with the increase of the humidity, and the natural hair It was found to exhibit a similar aspect to.

The artificial hair 10 of Example 10 is different from Example 6 in that the sheath / core capacity ratio is 1/2, and the others are the same.

As is apparent from FIG. 13, in the case of the artificial hair 10 of Example 10, under conditions of 40% humidity, the average value of natural hair is approximately 73O × 10 ⁻⁵ gfcm ² per piece, and the humidity is 40% to 4%. The flexural stiffness value decreases until just before 60%, and when the humidity is about 60%, the flexural stiffness value drops to 490 × 10 ⁻⁵ gfcm ² / piece. Next, when the humidity was 60% to 80%, the flexural rigidity value gradually decreased, and the flexural rigidity value decreased to 38Ox10 ^-5 gfcm ² / piece.

From this result, the artificial hair 10 of Example 10 has the bending stiffness value which is approximately equivalent to the bending stiffness value of natural hair at 40% of humidity, and shows that the bending stiffness value is decreasing with the increase of humidity. . If the humidity exceeds 60%, the flexural stiffness value of the artificial hair 10 is less than the flexural stiffness value of the natural hair, but the artificial hair made of nylon 6 of Comparative Example 1 or nylon MXD6 of Comparative Example 4 described later Compared with the flexural stiffness values of the artificial hairs, it was found that they exhibit a similar pattern to natural hair.

The artificial hair of Comparative Example 4 was made of nylon MXD6, the diameter of the yarn was 80 μm, and under the condition of 40% humidity, the bending rigidity value was 940 × 10 ^-5 gfcm ² / piece, and the humidity was around 40% to 60%. The bending stiffness value is lowered up to 870 × 10 ⁻⁵ gfcm ² / piece at a humidity of 60%. Further, the flexural stiffness value gradually decreased from 6% to 80% of humidity, and dropped to 78Ox10 ^-5 gfcm ² / piece at 80% of humidity. It was found that the bending stiffness value of Comparative Example 4 was significantly larger than that of natural hair or artificial hair of Examples 6 to 10 in the measured overall humidity range.

In the artificial hair of Comparative Example 5, 10% of nylon 6 was mixed with MXD nylon, and the diameter of the yarn was 80 µm. Under conditions of 40% humidity, the flexural stiffness value is 870 × 10 ^-5 gfcm ² / piece, and the flexural stiffness value decreases to around 60% humidity, and the humidity deteriorates to 720 × 10 ^-5 gfcm ² / piece at 60% humidity. . Further, the flexural stiffness value gradually decreased to 60% to 80% of humidity, and to 610 × 10 ⁻⁵ gfcm ² / piece at 80% of humidity. It was found that the flexural stiffness value of Comparative Example 5 was significantly larger than natural hair and artificial hair of Examples 6 to 10 in the measured overall humidity range.

And although the bending stiffness value of the artificial hair of the comparative example 1 was also shown similarly to FIG. 12, it turned out that it was remarkably smaller than natural hair and the artificial hair of Examples 6-10 in the measured whole humidity range.

As shown in FIG. 12 or FIG. 13, the bending stiffness values of natural hair are likely to cause individual differences unlike those made artificially. And also in the humidity change of the bending rigidity value of a natural hair, a width | variety (deviation) arises in humidity dependence. The flexural stiffness value due to the change in humidity of natural hair has a minimum value of 66O × 10 ^-5 gfcm ² / piece at a humidity of 40% and a maximum value of 74O × 10 ^-5 gfcm ² / piece, so this variation range is 8O × 10 ^-5 gfcm ² / piece. When the humidity is 6%, the minimum value is 52O × 10 ^-5 gfcm ² / piece, the maximum value is 66O × 10 ^-5 gfcm ² / piece, and the variation range is 14O × 10 ^-5 gfcm ² / piece, and the humidity is 4O% The larger the fluctuation range. At 80% humidity, the fluctuation range is widened, the minimum value is 42Ox10 ^-5 gfcm ² /, and the maximum value is 600x10 ^-5 gfcm ² /.

In the artificial hair 10 of Examples 1 to 10, the sheath was made of nylon 6 or nylon 66, the core was made of nylon 6T or nylon MXD6, and the sheath / core capacity ratio was changed so that the flexural stiffness value and the humidity thereof were changed. It is possible to obtain artificial hair 10 whose dependency is similar to natural hair. As apparent from Figs. 12 and 13, the flexural stiffness value of the artificial hair 10 produced by using nylon 6T or nylon MXD6 in the core portion 1B at a value close to ½ of the sheath / core capacity is natural. The flexural stiffness value of the artificial hair 10 produced by the sheath / core capacity ratio near 1/7 becomes near the maximum value of the flexural rigidity value of natural hair.

From this, in the artificial hair 10 of the sheath / core structure in which the core portion 1B is a semi-aromatic polyamide resin and the sheath portion 1A is an aliphatic polyamide resin, the sheath / core capacity ratio is 1/2. When it was in the range of ˜1 / 7, artificial hair similar to the aspect of the flexural rigidity value of natural hair could be obtained. As shown in Table 1 and Table 2, the sheath / core weight ratio of the artificial hair 10 produced in the range of the sheath / core capacity ratio is 1/2 to 1/7 is in the range of 10/90 to 35/65. .

In particular, in the case of the artificial hair 10 in which the sheath of Examples 6 to 10 is nylon 6 and the core is nylon MXD6, the flexural rigidity value at a temperature of 22 ° C. and a humidity of 40% to 50% is obtained from natural hair. It falls between the maximum value and minimum value of and shows the aspect close to the mean value. In the humidity range of 50% or more, the flexural stiffness values of the artificial hairs 10 of the sixth and seventh exemplary embodiments become characteristics close to the aspects at the maximum value of the flexural stiffness values of the natural hair. The bending rigidity value of the artificial hair 10 of 8 becomes a characteristic close to the aspect in the average value of the bending rigidity value of natural hair, and the bending rigidity value of the artificial hair 10 of Example 9 and Example 10 is natural It becomes the characteristic close to the minimum value of the bending stiffness value of the hair.

Next, the change by the moisture absorption of the artificial hair of an Example is demonstrated.

Figures 14 to 16 show (A) the artificial hair of the embodiment according to the present invention, (B) natural hair, and (C) the first curled state, respectively, of artificial hair using conventional polyester, immersed in water It is a figure which shows one state and the dry state after immersion in water. Each hair is tied at the upper part, and drying was natural drying.

As shown in FIG. 14, all hairs curled with the same length and the same curl diameter. When it is immersed in water, it turns out that the artificial hairs 1 and 10 of an Example increase by absorption of water, and the change of the length also shows the change close to natural hair (FIG. 15 (A) and FIG. 15). (B)). On the other hand, in the case of artificial hair using polyester, since the hygroscopicity is inferior, artificial hair does not increase, and it turns out that a curl does not deform and differs from the aspect of natural hair (refer FIG. 15 (C)).

In the dried state after being immersed in water, it can be seen that the artificial hairs 1 and 10 of the example return to the first state curled again and show a change close to natural hair (Fig. 16 (A) and Fig. 16). (B)). And although not shown, in the case of the artificial hair which consists of materials other than polyester, for example, since curl curls when water gets wet, it is known that it is difficult to return to an original curl even if it removes moisture under natural neglect.

Thus, even when curling is performed on the artificial hairs 1 and 10 of the present invention, it is found that the curling state when the water is soaked in water and the return state of the curl when the moisture is removed under natural neglect are similar to those of the natural hair. Could.

According to the artificial hair 10 of Examples 1 to 10, the bending stiffness value at a temperature of 22 ° C. and a humidity of 40% is equal to or very close to 72O × 10 ⁻⁵ gfcm ² / piece, which is an average value of natural hair. It was found to represent. Moreover, it turned out that the fall pattern of the bending stiffness value with the raise to 80% of humidity is also very close to natural hair. In addition, in the artificial hair 10 actually wetted with water, it was found that the curled state and the return state of the curl when the moisture was removed under natural neglect were similar to those of the natural hair.

Example  11

In the same manner as in the artificial hair 10 shown in Examples 1 to 10, artificial hair 10 having different diameters was produced for each kind, and a wig shown in FIG. 5 was produced. Artificial hairs of different diameters were properly arranged, and a part of the hair was curled to have a similar appearance to natural hair, and the wig was not unnaturally seen in the boundaries of the hairline or the wig. According to the evaluation of the wearer and the surrounding observer, the feel (appearance, touch, volume) is very natural, and in the state of being wet with rain or shower, as shown in Figs. 6 and 14 to 16, the hair is covered and the curl is loosened. The textures such as state, appearance, feel, volume, and the like, as well as natural hair of the wearer itself, did not cause hair separation, and could be attached very comfortably.

According to the above embodiment, the artificial hair produced by the present invention has a flexural stiffness value at a temperature of 22 ° C. and a humidity of 40%, or close to, or very close to, 72 × 10 × ^{5 −5} gfcm ² , the average value of natural hair. The value was obtained, and it was also found that the decrease of the bending stiffness value due to the increase in humidity was also very close to that of natural hair.

As a result, the wig 40 manufactured using the artificial hair 1 or the artificial hair 10 of the present invention has a touch (appearance, feel, texture) close to that of natural hair, and changes in these characteristics under high humidity or when wet with water. Since it is also close to natural hair, it has turned out that it can be attached with a natural feeling.

This invention is not limited to the said Example, A various deformation | transformation is possible within the scope of the invention as described in a claim, and of course, these are also included in the scope of this invention. For example, of course, the polyamide resin may be appropriately selected so as to obtain a desired bending stiffness value and the like.

According to the present invention, an artificial hair having a sheath / core structure and having a touch (appearance, feel, texture), various physical properties, in particular, a change in the bending stiffness and its humidity, which is close to natural hair can be provided. In addition, a wig using artificial hair having a sheath / core structure can impart a natural sense to the wearer and the observer around him rather than a wig using artificial hair made of a conventional single synthetic fiber material.

In particular, when the artificial hair is made of a sheath / core structure having a polyamide resin having a lower flexural rigidity than the core part as the sheath part, the flexural rigidity changes according to temperature and humidity, and artificial hair exhibiting a pattern closer to human hair can be obtained. As a result, even if the curled state is applied to the artificial hair of the present invention, it is possible that the curled state when soaked in water and the return state of the curl when the moisture is removed under natural neglect exhibit similar aspects to the natural hair.

Therefore, according to the wig of the present invention, when the wig is wet in the rain or in a high humidity environment, the flexural stiffness value due to moisture absorption of artificial hair changes, that is, the flexural stiffness value decreases as the humidity increases. As the artificial hair becomes soft, it falls down and loses a sense of volume. However, when the absorbed moisture is dampened by natural neglect or drying, the artificial hair gradually rises and returns to its original state. As a result, it is possible to obtain a wig similar to a state in which natural hair grows from the scalp, so that the wig is not revealed and an excellent appearance can be achieved.

Claims (16)

An artificial hair having a sheath / core structure comprising a core portion and a sheath portion covering the core portion, Wherein said core portion is made of a polyamide resin, and said sheath portion is made of a polyamide resin having a lower flexural rigidity than said core portion. The method of claim 1, An artificial hair, wherein the surface of the artificial hair has a fine uneven portion and is polished. The method of claim 2, The fine uneven portion is artificial hair, characterized in that formed by at least one of the spout and blast treatment. The method of claim 1, Wherein said core portion is made of a semi-aromatic polyamide resin, and said sheath portion is made of a straight chain saturated aliphatic polyamide resin. The method of claim 4, wherein Said semi-aromatic polyamide resin is an alternating copolymer of hexamethylenediamine and terephthalic acid, or an alternating copolymer of metha xylenediamine and adipic acid. The method of claim 4, wherein The linear saturated fatty acid polyamide resin is at least one of a caprolactam ring-opening polymer and an alternating copolymer of hexamethylenediamine and adipic acid. The method of claim 1, The sheath / core sheath / core weight ratio of the sheath portion and the core portion is 10/90 to 35/65. The method of claim 1, The artificial hair is artificial hair, characterized in that it contains at least one of pigments and dyes. A wig comprising a wig base and artificial hair attached to the wig base, The artificial hair has a sheath / core structure composed of a core portion and a sheath portion covering the core portion, The core part is made of polyamide resin, and the sheath part is made of artificial hair made of polyamide resin having a lower flexural rigidity than the core part. The method of claim 9, The surface of the said artificial hair has a fine uneven | corrugated part, The wig characterized by the above-mentioned. The method of claim 10, The fine uneven portion is a wig, characterized in that formed by one or more of the Chinese New Year and blasting. The method of claim 9, And wherein the core portion is made of a semi-aromatic polyamide resin, and the sheath portion is made of a straight chain saturated aliphatic polyamide resin. The method of claim 12, Said semi-aromatic polyamide resin is an alternating copolymer of hexamethylenediamine and terephthalic acid, or a alternating copolymer of metha xylenediamine and adipic acid. The method of claim 12, Said straight chain saturated fatty acid polyamide resin is one or more of a caprolactam ring-opening polymer and the alternating copolymer of hexamethylenediamine and adipic acid. The method of claim 9, The sheath / core sheath / core weight ratio of the sheath portion and the core portion is 10/90 to 35/65. The method of claim 9, The artificial hair is a wig, characterized in that it contains at least one of pigments and dyes.

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