JPH0563198B2 - - Google Patents

Description

[Detailed description of the invention]

(a) Object of the invention Field of industrial application The present invention relates to a doll having thermochromic hair that reversibly changes color depending on temperature. The doll with thermochromic hair of the present invention has the ability to change color colorfully and sensitively and reversibly due to temperature changes to the hair of conventional dolls, and has been given the ability to cause color changes due to temperature changes. About a completely new stuffed animal. PRIOR ART Until now, no effective proposals have been disclosed regarding dolls having thermochromic hair that changes color in a variety of ways due to changes in temperature, and such dolls have been eagerly awaited. Problems to be Solved by the Invention The present invention provides doll hair with a thermochromic function that reversibly changes color in response to changes in temperature, which has not been possible in the past. (B) Structure and Effects of the Invention Means for Solving the Problems The present invention provides a surface of each elementary fiber of a fiber composed of a plurality of elementary fibers having the following formula: r≦10√ [r: pigment particle size (μm). D: Denier number of basic fiber (denier). d: Specific gravity of elementary fiber (g/cm ³ )]
A thermochromic layer consisting of a thermochromic pigment and a binder made of a thermochromic material consisting of a combination of an electron-donating color former, an electron-accepting color developer, and a discoloration temperature regulator, with a particle size that satisfies the above conditions. The thermochromic layer has an adhesion amount of 3% to 90% by weight with respect to each elementary fiber, and the thermochromic pigment has an adhesion amount of 5% to 90% by weight in the thermochromic layer.
The present invention relates to a doll having thermochromic hair comprising at least a portion of the hair of thermochromic fibers in an amount of 80% by weight. In the present invention, in order to achieve a good and uniform thermochromic effect on hair, the particle size of the pigment is r≦10√
It is necessary to satisfy D/d [r: particle size of pigment, D: denier number of elementary fiber, d: specific gravity of elementary fiber]. In the present invention, each elementary fiber, which is the basic unit of hair, is independently provided with a thermochromic layer, so the distribution of the thermochromic pigment to the fibers is uniform, and as a result, the hair It has a good texture and even thermochromic properties. For this purpose, the particle size of the pigment must be within a specific range. According to research by the present inventors, the uneven discoloration of hair made of fibers coated with thermochromic pigments is due to uneven distribution of the pigment, and this uneven distribution is caused by the pigment spreading over multiple fibers. It was revealed that this is due to the formation of bridges. In other words, depending on the particle size and the thickness of the elementary fibers, if the pigment binds multiple elementary fibers together in a bridge-like manner, a large amount of the thermochromic pigment tends to gather in this area, resulting in uneven distribution of the pigment. This causes uneven heat discoloration. Since uneven discoloration is caused by the cross-linking phenomenon, it cannot be prevented simply by regulating the particle size of the pigment, and the relationship with the thickness of the elementary fibers becomes an important issue. Based on these new findings, the present inventors conducted research to solve the conventional problems, and found that if the above relationship of r≦10√ is satisfied between the pigment and the basic fiber, the above-mentioned phenomenon can be prevented and uneven discoloration can be prevented. The present invention successfully prevents heat discoloration and, based on this, provides a doll having hair without uneven heat discoloration. Another feature of the present invention is that a thermochromic layer made of a pigment and a binder is provided on the surface of each elementary fiber of the fibers that make up the doll's hair. Because the thermochromic layer is provided on the surface of each individual fiber, the distribution of the thermochromic pigment throughout the fabric is uniform, and the texture, flexibility, and pigment adhesion strength are uniform throughout. This new structural unit is a novel thermochromic fiber that has not been previously known. Therefore, the hair made of these basic fibers is a novel product that exhibits uniform thermochromic properties, texture, and pigment adhesion. In the present invention, the specific relationship between the thickness of the elementary fiber and the particle size of the thermochromic pigment is particularly determined by r≦10√
D/d [r: particle size of pigment, D: denier number of elementary fiber, d: specific gravity of elementary fiber] is defined by the cross-sectional shape of the elementary fiber used, such as polygonal, flat, This is because it is meaningless to simply specify the wire diameter of the elementary fiber and the particle diameter of the pigment in order to prevent the bridging phenomenon of the pigment particle diameter. This configuration is essential in order to achieve this goal and produce unique effects. The hair in the present invention is made of pile fabric, wool, or the like, which is composed of basic fibers provided with the above-mentioned thermochromic layer. The term "wool yarn" here refers to a yarn made by gathering and twisting a plurality of yarns spun from short fibers, and is not limited to wool, but also refers to yarns using chemical fibers or blends of the above-mentioned fibers. The thermochromic layer in the present invention is suitably 3% to 90% by weight based on the basic fibers constituting the hair, and particularly preferably 5% to 70% by weight in view of the thermochromic discoloration effect. . The reason for this is that as a result of examining various adhesion amounts, the following became clear. i.e. 3% by weight
If it is less than that, the texture is good, but the density is low and the color change is not clear, so it is not practical for use as doll hair. In addition, if the amount of coating exceeds 90% by weight, the concentration is high and the color change is clear, but the texture is impaired because binding between elementary fibers tends to occur and it is difficult to make each elementary fiber exist independently. However, it is not practical as doll hair because it does not have a flexible feel. Therefore, a range of 3% to 90% by weight is a practical range that satisfies both the density, clarity of color change, and soft texture. Furthermore, in the range of 5% to 70% by weight, the density and color change are clear enough, and there is no binding between elementary fibers.
Because each fiber can exist completely independently, the best quality thermochromic fiber can be obtained, which exhibits a very flexible texture and has a sufficient balance of pigment adhesion strength. The doll's hair has extremely good effects. Effect: The thermochromic hair of the present invention uses a thermochromic pigment with a particle size suitable for the denier of the basic fibers, so no bridges occur between the fibers, resulting in excellent uniformity, flexibility, texture, abrasion resistance, and washability. It can possess excellent performance. That is, thermochromic hair made of fibers that are not cross-linked with pigments is very soft and has a good feel because the gaps between the fibers are not bridged. The doll having thermochromic hair of the present invention exhibits a thermochromic effect that cannot be obtained with ordinary stuffed animals. Specifically, for example, when you blow on someone's breath, their brown hair turns blue; when you hold them, their black hair turns yellow due to body heat; and when they get into a futon together, their brown hair turns yellow due to internal heat. , when they take a bath together, their blue hair changes to pink depending on the temperature of the water; when they take it outside from the room, their white hair changes to pink due to the change in temperature; they also have multicolored designs. By incorporating it, when you blow on it, it produces completely new effects, such as brown hair changing into a pink and green pattern. As the thermochromic pigment used in the present invention, conventionally known reversible thermochromic materials consisting of a combination of an electron-donating color former and an electron-accepting color developer are effective. Examples include thermochromic materials disclosed in Japanese Patent Publication No. 51-44707, Japanese Patent Publication No. 51-44708, and Japanese Patent Publication No. 51-35216. For example, (a) electron-donating color formers, (b) compounds with phenolic hydroxyl groups and their metal salts, aromatic carboxylic acids and aliphatic carboxylic acids having 2 to 5 carbon atoms, carboxylates, acidic phosphoric acid esters. and metal salts thereof, 1,2,3-triazole and its derivatives, electron-accepting color developers such as halohydrin compounds, (c) alcohols, esters, ketones, ethers, acid amides, carbon number 6 or more aliphatic carboxylic acids, thiols, sulfides,
Disulfides, sulfoxides, sulfones,
A thermochromic pigment consisting of a color-changing temperature adjusting agent such as the following is used. Specific examples are shown in the attached table.
The numbers in parentheses indicate parts by weight.

【table】

[Table] These thermochromic materials are approximately -30°C to +100°C.
At temperatures between ℃, red, blue, yellow, green, orange,
Violet, brown, black, and other combinations can reversibly and instantly change subtle colors from colored to colorless, and from colorless to colored, and by adding optical brighteners, the vividness of white in colorless colors can be increased. , the contrast can be further strengthened. Furthermore, color changes can be achieved by adding colored compounds such as general dyes, fluorescent dyes, pigments, fluorescent pigments, and phosphorescent pigments.
It is effective because it can change from colored() to another different colored(). It also allows light to pass through it, and can become transparent in response to changes in temperature, revealing the underlying layer. In order to turn these thermochromic materials into pigments, the thermochromic materials are encapsulated in microcapsules or blended with various resins, emulsified and then cured, or sprayed and then cured or solidified using a spray drying method, and then pulverized after curing. etc. to make it into fine particles. When this pigment is coated on the fiber surface, thermochromic hair that changes color and colorless depending on temperature changes is formed. Next, in order to create thermochromic fibers that change from colored () to colored () using these thermochromic pigments that change from colored to colorless, a colored component is added to the thermochromic composition. Coat the surface of the basic fibers with thermochromic pigments that change from colored () to colored (), or coat thermochromic pigments that change from colored to colorless together with general pigments, fluorescent pigments, phosphorescent pigments, dyes, or fluorescent dyes. Microencapsulated or particulate materials may be coated on the surface of elementary fibers, or colored colorless thermochromic pigments may be coated on the surface of elementary fibers colored with general dyes or pigments. Also,
A method may be used, such as blending raw fibers coated with a thermochromic pigment that changes color and colorless and raw fibers colored with general dyes or pigments. Examples of the binder for binding the obtained thermochromic pigment to the basic fibers include conventionally known waxes, low-melting thermoplastic resins, rubbers, natural resins, synthetic resins, and the like. For example, low molecular polyethylene, low melting point polyester, ethylene-vinyl acetate copolymer,
Chlorinated rubber, polyvinyl acetate emulsion, polyethylene emulsion, acrylic emulsion, styrene resin emulsion, butadiene-nitrile emulsion, shellac, zein, unsaturated polyester resin, epoxy resin, cellulose resin, polyurethane resin, phenolic resin, Examples include vinyl chloride resin, vinyl acetate resin, silicone resin, polyvinyl alcohol, and polyvinyl methyl ether. Various materials and forms of single fibers are effective, and specific examples include natural fibers, semi-synthetic fibers, synthetic fibers, other chemical fibers such as copolymer fibers, inorganic fibers, and metal fibers. Examples include cotton, wool, goat hair, camel hair, rabbit hair,
Silk, natural silk thread, casein fiber, soy protein fiber,
Zein fiber, peanut protein fiber, recycled silk thread, viscose rayon, copper ammonia rayon, saponified acetate, natural rubber fiber, alginate fiber,
Acetate fiber, triacetate fiber, acetylated stable fiber, ethyl cellulose fiber, chlorinated rubber fiber, polyamide fiber, polyester fiber, polyurethane fiber, polyethylene fiber,
Polypropylene fiber, polyvinyl chloride fiber, polyvinylidene chloride fiber, polyfluoroethylene fiber, polyacrylonitrile fiber, polyvinyl alcohol fiber, Promix fiber, benzoate fiber, polyclar fiber, polynosic fiber, acrylonitrile-alkylvinylpyridine copolymer Fiber, acrylonitrile-ethylene copolymer fiber, acrylonitrile-vinyl chloride copolymer fiber, vinyl chloride-vinylidene chloride copolymer fiber, vinyl chloride-vinyl acetate copolymer fiber, vinyl chloride-
Examples include acrylonitrile copolymer fiber, vinyl chloride-ethylene copolymer fiber, glass fiber, rock wool, ceramic fiber, and carbon fiber. In addition to the normal fiber shapes, the shapes include triangular, pentagonal, octagonal, Y-shaped, L-shaped, star-shaped, dogbone-shaped, horseshoe-shaped, uneven cross-section fibers, macaroni-shaped, lotus root-shaped, sponge-shaped, Hollow fibers such as field shapes, side. by. Examples include conjugate fibers of side type, sheath type, core type, matrix type, etc. Irregular cross-section fibers and hollow fibers have a large surface area and are easy to adhere to pigments, so they have the characteristic that they can be highly concentrated. Various forms of hair made of thermochromic fibers coated with thermochromic pigments are effective. For example, spun yarn, filament yarn, twisted yarn, crimped yarn of fiber bundles made of continuous filaments bundled in the longitudinal direction,
Thread made by twisting and converging multiple threads spun from short fibers (e.g., wool-like, including not only wool but also synthetic fibers and blends thereof), thermochromic pile Examples include fabrics, etc. Next, an example of manufacturing the thermochromic fiber described above will be disclosed. The target elementary fibers (which may be crimped if necessary) are dipped in a coating composition consisting of a thermochromic pigment, a binder, and a coloring agent, and then dried, or blown by spraying, etc. The thermochromic fibers obtained by direct coating with a brush, roll coater, etc. and drying treatment are crimped if necessary to form thermochromic filaments.
Furthermore, by bundling and twisting a plurality of yarns, thermochromic filament yarn or crimped yarn can be obtained. Alternatively, thermochromic raw cotton cut into an appropriate length after crimping or the target raw cotton is immersed in the above-mentioned coating composition, and then the excess composition is removed by centrifugation, roll shading, air gun, etc. The thermochromic raw cotton obtained by drying, spraying, brushing, direct coating with a roll coater, etc. is applied to a card to make a sliver, and then undergoes a spinning process to produce thermochromic spun yarn or wool. It is made into a twisted bundled yarn. Next, thermochromic pile fabrics refer to various pile fabrics such as thermochromic high pile fabrics and thermochromic flocked fabrics. Thermochromic pile fabrics use the above-mentioned thermochromic filaments, thermochromic filament yarns, or thermochromic spun yarns for the warp yarns, and can be used for warp piles such as velvet or plastic, or for the weft yarns, and can be used for warp yarns such as velvet or plassy. Weft pile weave such as
Cut it at an appropriate position to make the surface of the fabric covered with fluff. It can also be used as a loop like a towel or a blanket. In addition, it can be obtained by impregnating a preformed pile fabric with a coating composition, printing, coating, spraying, etc., followed by drying treatment and hair splitting. The thermochromic high pile fabric is obtained by knitting the thermochromic raw cotton described above by carding it into a sliver using a high pile knitting machine.
This high pile fabric has long piles and a large amount of thermochromic pigments, so it has a particularly excellent thermochromic effect. The thermochromic flocked fabric is made by cutting the thermochromic filament described above to an appropriate length and making it into a pile.
It can be obtained by a mechanical flocking process such as a scattering type, a vibration type, a blowing type, or an electrostatic flocking process. A doll with thermochromic hair made of the thermochromic pile fabric of the present invention with a pile length of 3 mm or more can be prepared by cutting the thermochromic pile fabric according to the pattern of the doll's head and sewing or pasting it. It can be obtained by doing this and is extremely effective. The thermochromic layer in the present invention is suitably 3% to 90% by weight of the basic fibers constituting the doll's hair, and particularly 5% to 70% by weight, considering the thermochromic discoloration effect. suitable. Further, the thermochromic pigment is suitably contained in the thermochromic layer in an amount of 5% to 80% by weight, particularly preferably 10% to 60% by weight in view of the thermochromic color change effect. That is, if it is less than 5% by weight, the coloring density is low and a color change cannot be clearly seen, while if it exceeds 80% by weight, it is difficult to clearly see a decolorized state. The range of 10% to 60% by weight is
This is the optimal range that maintains the balance between density and color change. The resin to be applied is appropriately selected from the binders described above, and if necessary, an antioxidant, an ultraviolet absorber, an anti-aging agent, etc. can be added to make the thermochromic function permanent. Examples are described below. Note that parts in the examples are parts by weight. Examples 1 Spiro [isobenzofuran-1 (3H), 9'-
[9H]xanthene]-3-one, 6'-(diethylamino)-2'-[cyclohexyl (phenylmethyl)
A thermochromic composition consisting of 1 part of Amino], 2 parts of bisphenol A, and 25 parts of caprylic acid is encapsulated by a coacervation method using gelatin/gum arabic, and has a particle size of 8 μm that satisfies r≦10√. A coating composition was prepared by uniformly mixing 500 parts of acrylic acid ester resin emulsion with 500 parts of acrylic acid ester resin emulsion having a solid content of approximately 42%, and dyed yellow.
After soaking, 700 parts of 6D acrylonitrile-vinyl acetate copolymer fiber (d=1.18) was taken out and heated at 90℃10.
The thermochromic acrylonitrile-vinyl acetate copolymer fiber obtained by drying for minutes was cut into 4 mm pieces to make a thermochromic pile for flocking. A thermochromic flocked fabric obtained by hair flocking using the formula processing method was sewn onto a doll's head to obtain a doll with thermochromic hair. The thermochromic hair exhibited green color at temperatures below 15°C, turned yellow at temperatures above 15°C, and returned to green when the temperature was lowered to below 15°C, exhibiting reversible thermochromic properties. Example 2 A thermochromic composition consisting of 1 part of crystal violet lactone, 3 parts of benzyl 4-hydroxybenzoate, and 25 parts of stearyl alcohol was encapsulated using an interfacial polymerization method using an epoxy resin/amine curing agent, satisfying r≦10√ A coating composition made by uniformly mixing 600 parts of thermochromic microcapsules with a particle size of 12 μm and 1000 parts of a vinyl acetate copolymer resin emulsion with a solid content of about 50% was added to 800 parts of 8D nylon fiber (d = 1.14). Spray with a spray gun
The thermochromic nylon fiber obtained by drying at 100℃ for 10 minutes is cut into 5 mm pieces to make thermochromic pile for flocking, and electrostatically processed on the urethane surface of a base material made by fusing urethane foam to nylon fabric. The thermochromic flocked fabric obtained by the method is sewn onto the doll's head.
A doll with thermochromic hair was obtained. The thermochromic hair exhibited a blue color at temperatures below 53°C, turned colorless at temperatures above 53°C, and returned to blue when the temperature was lowered to below 53°C, demonstrating reversible thermochromic properties. Example 3 Spiro[12-H-benzo[α]xanthene-
12, 1′(3′H)-isobenzofuran]-3′-one, 9
-(diethylamino)-1 part, zinc benzoate 2 parts,
A thermochromic composition consisting of 15 parts of myristyl alcohol and 10 parts of capric acid stearin was mixed into an epoxy resin/
Solidified to the inside with amine curing agent r≦10√
5D polyester fiber ( d=1.38) Pile length 10mm
The thermochromic polyester pile fabric obtained by gravure coating, drying at 80℃ for 30 minutes, and hair splitting is sewn onto the doll's head to create a doll with thermochromic hair. Obtained. The above thermochromic hair exhibited a red color at temperatures below 25°C, changed to yellow at temperatures above 25°C, and returned to red when the temperature was lowered to below 25°C, demonstrating reversible thermochromic properties. Example 4 Spiro [isobenzofuran-1 (3H), 9'-
[9H]xanthene]-3-one, 1 part of 6'-(cyclohexylmethylamino)-3'-methyl-2'-(phenylamino)-, 3 parts of 5-chloro-1,2,3-benzotriazole, di 25 parts of lauryl ether was uniformly kneaded into 750 parts of polypropylene, cooled, and finely pulverized. 60 parts of thermochromic microparticles with a particle size of 7 μm satisfying r≦10√, 200 parts of glycidyl ether type epoxy resin, and amine. A coating composition in which 80 parts of a hardening agent was uniformly mixed was sprayed onto a melias knit pile fabric with a pile length of 15 mm made of 5D polyacrylonitrile fiber (d = 1.17) using a spray gun, dried at 80°C for 30 minutes, and split. The resulting thermochromic polyacrylonitrile pile fabric was adhered to the doll's head with an adhesive to obtain a doll with thermochromic hair. The above-mentioned thermochromic hair exhibited a black color at temperatures below 30°C, turned colorless at temperatures above 30°C, and returned to black when the temperature was lowered to below 30°C, demonstrating reversible thermochromic properties. Example 5 Spiro [isobenzofuran-1 (3H), 9'-
[9H]xanthene]-3-one, 3'-(diethylamino)-6',8'-dimethyl-1 part, CISolvent
Blue 25 0.15 parts, 4-chlorobenzoic acid 3 parts, 1,
400 parts of thermochromic microparticles with a particle diameter of 4 μm that satisfy r≦10√, solidified with an acrylic resin/amine curing agent to the inside of a thermochromic composition consisting of 25 parts of 10-decanediol, solid content approximately 45% 500 parts of crimped 3D polypropylene fibers (d = 0.91) were immersed in a coating composition in which 600 parts of a vinyl acetate-ethylene-vinyl chloride terpolymer emulsion was uniformly mixed, and then taken out. The thermochromic polypropylene fiber obtained by drying at 100℃ for 5 minutes is cut into 70 mm pieces to obtain thermochromic polypropylene raw cotton, which is carded to make a sliver, knitted with a high pile knitting machine, and sheared. A thermochromic polypropylene high pile fabric with a pile length of 30 mm was cut into the shape of a doll's head and adhered to the doll's head with adhesive to obtain a doll with thermochromic hair. The above-mentioned thermochromic hair exhibited a brown color at temperatures below 70°C, changed to blue at temperatures above 70°C, and returned to brown when the temperature was lowered to below 70°C, demonstrating reversible thermochromic properties. Example 6 1(3H)-isobenzofuranone, 3-(1-ethyl-2-methyl-1H-indol-3-yl)-
3-(4-diethylaminophenyl)-1 part, 4,
A thermochromic composition consisting of 3 parts of 4-thio-bis(3-methyl-6-tert-butylphenol) and 25 parts of butyl palmitate was encapsulated using an interfacial polymerization method using a polyisocyanate/amine curing agent. √
A coating composition containing 600 parts of thermochromic microcapsules with a particle size of 8 μm that satisfies D/d and 400 parts of an acrylic-vinyl acetate copolymer emulsion with a solid content of approximately 45% is mixed with a 7D capsule having a cut length of 90 mm. A thermochromic acrylonitrile-vinyl chloride copolymer obtained by soaking 400 parts of raw cotton made of acrylonitrile-vinyl chloride copolymer flat cross-section plain fibers (d=1.25), removing the excess composition with an air gun, and drying at 100°C for 10 minutes. Polymerized raw cotton and fluorescent pink colored 5D polyacrylonitrile raw cotton with a cut length of 90 mm were carded at a ratio of 2:1 to make a mixed sliver, then knitted with a high pile knitting machine and sheared to obtain a pile length of 40 mm. The thermochromic high pile fabric was cut into the shape of a doll's head and adhered to the doll's head with adhesive to obtain a doll with thermochromic hair. The above-mentioned thermochromic hair exhibits a purple color at temperatures below -10°C, changes to pink when the temperature rises above -10°C, and returns to purple when the temperature is lowered to -10°C or lower, exhibiting reversible thermochromic properties. Ta. Example 7 1(3H)-isobenzofuranone, 3,3-bis(1-ethyl-2-methyl-1H-indole-3
A thermochromic composition consisting of 1 part of Naphthoic acid, 2 parts of naphthoic acid, and 25 parts of cetyl alcohol is encapsulated using an interfacial polymerization method using an acrylic resin/amine curing agent. 800 parts of 7D polyacrylonitrile fiber (d = 1.17) was immersed in a coating composition in which 500 parts of color-changing microcapsules and 500 parts of acrylic acid ester resin emulsion with a solid content of about 45% were uniformly mixed, and then taken out. Thermochromic polyacrylonitrile fibers obtained by drying at 100°C for 5 minutes are crimped and
A thermochromic raw cotton was obtained by bias cutting to 130 mm.
The raw cotton was carded and twisted in a conventional manner to obtain a bulky yarn, and three of the yarns were bundled and twisted to obtain a woolen yarn with an outer diameter of about 3 mm. After cutting the yarn into appropriate dimensions, the ends were glued to the doll's head to obtain a doll with thermochromic hair. Example 8 Using the coating composition described in Example 7 above,
After soaking 800g of wool fiber (40-130mm long fiber equivalent to d=1.32, 4-20D) in this, take it out and
Using the thermochromic raw cotton obtained by drying at ℃ for 5 minutes, it was twisted in a conventional manner to form a yarn with an outer diameter of about 3 mm, and a doll with thermochromic hair was obtained in the same manner as in Example 7. It was done. The thermochromic hair of Examples 7 and 8 exhibited a reversible thermochromic property that exhibited pink color at temperatures below 40°C and became colorless at temperatures above 40°C. As explained above, the present invention has the ability to reversibly change color due to temperature changes, and has the same uniformity, flexibility, texture, rubbing method, and washability as the performance of ordinary doll hair. The present invention provides a doll with thermochromic hair, which is completely unknown and which has extremely excellent characteristics and has established a new toy field that has not existed in the past.

Claims (1)

[Claims] 1. The surface of each elementary fiber of a fiber consisting of a plurality of elementary fibers has the following formula r≦10√ [r: pigment particle size (μm). D: Denier number of basic fiber (denier). d: Specific gravity of elementary fiber (g/cm ³ )]
A thermochromic layer consisting of a thermochromic pigment and a binder made of a thermochromic material consisting of a combination of an electron-donating color former, an electron-accepting color developer, and a discoloration temperature regulator, with a particle size that satisfies the above conditions. The thermochromic layer has an adhesion amount of 3% to 90% by weight with respect to each elementary fiber, and the thermochromic pigment has an adhesion amount of 5% to 90% by weight in the thermochromic layer.
A doll having thermochromic hair comprising at least a portion of the hair made of thermochromic fibers that is 80% by weight. 2. A doll having thermochromic hair according to claim 1, wherein the hair is made of thermochromic pile fabric. 3. Hair collects multiple threads made from short fibers,
A doll having thermochromic hair according to claim 1, which is formed from twisted yarn.