JP2002242017A - Alternately color-changeable wig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alternately color-changeable wig which can change its color into a different color by the application of heat or cold and can alternatively memorize either of the changed colors in an ordinary temperature range. SOLUTION: This alternately color-changeable wig uses filaments formed from a fiber-forming polymer containing a specific thermally color-changeable pigment in a dispersed state. The pigment can be alternately discolored between a color (1) and a different color (2) by the application of heat or cold. Either of the changed colors (1) and (2) can alternately memorized and held in an ambient temperature range of at least 20 to 30 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color-neutral wig. More specifically, by applying heat or cold, the color (1) and the color (2) can be alternately displaced into different colors, and the displaced color (1) or the color (2) is displaced.
Is related to a color-neutral wig constituted by filaments that are alternatively stored in a temperature range of at least 20 ° C. to 30 ° C.

[0002]

2. Description of the Related Art Several proposals have been made on thermochromic wigs (Japanese Utility Model Laid-Open No. 59-83932, Japanese Patent Laid-Open No. 62-149907). Even if the color can be changed by a change in temperature, the proposal immediately returns to the original color as soon as the application of heat or cold required for the color change is removed, and in the normal temperature range, the changed color can be stored and retained. It was not possible, and it did not always satisfy the pseudo hair properties such as touch feeling and gloss.

[0003]

SUMMARY OF THE INVENTION According to the present invention, a user can be alternately displaced to an aspect having different colors by thermal means, and the displaced aspect can be selectively used in a normal temperature range. Retain and retain, the appearance does not change at the outside air temperature in the daily living temperature range, the color is different in a single wig, two types of wigs according to the user's preference, An object of the present invention is to provide a color-neutral wig composed of a filament having both selectivity and a wig's inherently flexible and soft pseudo-hairy feel.

[0004]

According to the present invention, by applying heat or cold, the colored (1) and the colored (2) can be alternately displaced to different colors, and the displaced colored (1) can be displaced. ) Or colored (2) is at least 2
A color-neutral wig that is alternatively stored and held in an environmental temperature range of 0 ° C. to 30 ° C., which is formed by blending a thermochromic pigment in a dispersed state in a fiber-forming polymer. The filament comprises a filament having a diameter of 30 to 200 μm, and the filament contains 0.1 to 30% by weight of a thermochromic pigment, and the thermochromic pigment has a hysteresis in a temperature-color density curve. Width ΔH is 1
When the color development and erasure are performed at 2 to 60 ° C. and the complete color development temperature t ₁ , the color development start temperature t ₂ , the color erasure start temperature t ₃ , and the complete color erasure temperature t ₄ , the substantial color holding temperature width ΔT (= t ₃ −t ₂ )
Is 10 to 40 ° C., and ΔA (= t ₂ −t ₁ ) and / or ΔB (= t ₄ −t ₃ ) is 1 to 10 ° C. A color-neutral wig characterized by being selected is required.

Further, the fiber-forming polymer comprises a polyolefin resin and / or a thermoplastic resin blended with the polyolefin resin, and has a flexural modulus of 300 MPa.
Being in the range of ~ 1500 MPa, furthermore, the polyolefin-based resin is selected from any of polypropylene-ethylene random copolymer, block copolymer, blend resin of polypropylene and polyethylene,
Further, the thermoplastic resin is selected from ethylene-vinyl acetate copolymer resin, acrylate resin, ethylene-acrylate copolymer resin, or polyester, polyamide, polyurethane, or styrene. Being an elastomer, and the fiber-forming polymer is nylon 6, nylon 66, nylon 1
2. It is a polyamide resin selected from nylon 6-12 copolymer. Further, the filament comprises a core portion blended with a thermochromic pigment and a sheath portion blended with no thermochromic pigment. In the form of a core-in-sheath type conjugate fiber, and furthermore, the core and the sheath are made of polyolefin-based resins or polyamide-based resins. A microcapsule contains a reversible thermochromic composition comprising a donor color-forming organic compound, (b) an electron-accepting compound, and (c) a homogeneous solution of a reaction medium that determines the temperature at which the color reaction of the two occurs. The pigment in the form of microcapsules,
The thermochromic pigment is a pigment in the form of a capsule having a non-circular cross-sectional shape having a depression on at least a part of the outer surface. The colored (1) or colored (2) is any of black, brown, blonde, or red , And the flame retardant is mixed and dispersed in 1 to 25% by weight with respect to the filament.

In the above, the fiber-forming polymer includes low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene and polypropylene.
Ethylene copolymer, polyisobutylene, polybutadiene, polymethylpentene, polystyrene, styrene butadiene resin, ethylene-propylene rubber, nylon 1
2. Polyamides such as nylon 11, nylon 6, nylon 6, nylon 6-11 copolymer, nylon elastomer, polyester resins such as polybutylene terephthalate, polyhexamethylene terephthalate, vinyl chloride resin, vinyl chloride-vinylidene chloride copolymer resin, acrylonitrile And a polymer mainly containing 30 to 70% by weight of acrylonitrile and 30 to 70% by weight of vinyl chloride and / or vinylidene chloride. It is not limited.

[0007] In the case of artificial wigs, when the outer diameter of the filament is 30 µm or less, the hair tends to be in an upright state due to a lack of absolute weight per filament in addition to lack of pseudo hair appearance. Lack of character. On the other hand, if the outer diameter exceeds 200 μm, the touch becomes rough and rigid in addition to the uncomfortable appearance, and the outer diameter of 30 μm to 200 μm (preferably 60 μm to 150 μm) is a practically acceptable range.

In the above-mentioned fiber-forming polymer, in the case of a polyolefin resin, the feel as pseudo hair depends greatly on the flexural modulus of the resin, and in a system having a flexural modulus of less than 300 MPa, the feel is soft, It is difficult to recover to the original state because there is no waist under external stress. On the other hand, when the flexural modulus is 1
If it exceeds 500 MPa, the feel is remarkably coarse and stiff, has no pseudo-hairiness, and is hardly practical. Flexural modulus 300 ~
In the range of 1500 MPa, low-density polyethylene, linear low-density polyethylene, polypropylene, or a single polypropylene-ethylene copolymer, or a combination of a plurality of the above-described polymers is preferable. Is more preferred, while satisfying the tensile strength of the above.

In the system containing the above-mentioned polyolefin resin as a main component, the blended thermochromic pigment can be continuously and effectively developed without impairing the reversible thermochromic function of the blended thermochromic pigment. In a combination in which a slight residual color adversely affects the color interchangeability, 0.1 to 50% by weight (preferably 0.5 to 40% by weight) of the polyamide resin (including the elastomer) is used based on the polyolefin resin. (% By weight) By blending, it is possible to prevent the occurrence of a slight residual color at the time of decoloring. The phenomenon of slight faint residual color at the time of decoloring is presumed to be due to the polymerization catalyst added during the production of the polyolefin resin having some effect on the thermochromic pigment. It has been found that the above-mentioned residual color can be effectively eliminated by the addition of the above.

The polyolefin resin has a flexural modulus of 1
In a resin type system exceeding 500 MPa, the flexural modulus is 3
Thermoplastic resin of 00 MPa or less, for example, ethylene-vinyl acetate copolymer resin, acrylate resin, ethylene-acrylate copolymer resin, or the like, or polyester-based, polyamide-based, polyurethane-based, styrene-based elastomers, etc. To form a base resin, and the base resin has a flexural modulus of 300 MPa to 15
By forming the filament in the range of 00 MPa, it is possible to provide flexibility, moderate flexibility, and filament strength.

In the case where the fiber-forming polymer is a polyamide resin selected from nylon 6, nylon 66, nylon 12, and nylon 6-12 copolymer alone or in a system in which the plurality of resins are blended, It is rich in glossiness and supple tactile sensation as a pseudo-hair filament, and exhibits the desired thermochromic function continuously and effectively.

The filament in the present invention is further constituted by a core-sheath type composite fiber form (see FIG. 1).
Durability such as light fastness, washing fastness and friction fastness, and glossiness can be further improved. In addition, by forming a composite fiber, there is no exposure of components such as thermochromic pigments and additives to the surface, and these components do not directly touch human skin, and in terms of hygiene and safety, See, it is effective.
The core part (A) and the sheath part (B) may be a combination of different kinds of resins. However, the combination of the resins having the same structure is excellent in interface bonding property and there is no danger of peeling. Since it is possible to provide integrated high-strength fiber physical properties, and furthermore, it is a combination of resins having the same refractive index and the same property, so that the fiber as a whole is rich in transparency and gloss, and the fiberization process In particular, in the stretching step, the stretchability of the resins is the same, so that a constant stretching ratio can be set, and a filament in the form of a composite fiber having a desired fiber strength can be obtained.

In the thermochromic pigment applied to the present invention, as shown in the explanatory diagram of FIG. 2, the shape of the curve plotting the change in the coloring density due to the temperature change is such that the temperature changes from a temperature lower than the color development temperature range to a higher temperature. In the case of changing, and in the case of changing from the high temperature side to the low temperature side, the color changes following a significantly different path, and becomes substantially completely colored in a temperature range of t ₁ or less,
The colored state starts decolored at t _3, becomes essentially completely decolorized state at t ₄ above temperature range, the temperature drop from the complete decolored state, to start the color development at t _2, t ₁ shows a substantially completely colored state.
Here, ΔH indicates a temperature range between an intermediate temperature between t ₁ and t _{2 and} an intermediate temperature between t ₃ and t ₄ , and a substantial color holding temperature range ΔT is a value between t ₂ and t ₃ . The temperature range, the fully colored state and the completely decolored state show tautomerism,
One of the states is alternatively a temperature range in which the state is substantially stored and held. ΔA (= t ₂ −t ₁ ) indicates the temperature width of transition from the decolored state to the colored state, and ΔB (= t ₄ −
t ₃ ) indicates the temperature range of the transition from the color-developing state to the color-erased state. As both of the temperature widths become smaller, the sensitivity of the transition to the color-developed state or the transition to the color-erased state is improved, It is possible to narrow the temperature range showing the intermediate color density in the transition period of discoloration, suppress the visual sense of the intermediate color as much as possible, and effectively express and distinguish the clear color. In the present invention, among the thermochromic pigments described above, ΔH is 12 to 60 ° C.
And the color is erased, and the substantial color holding temperature width ΔT (= t ₃
−t ₂ ) is 10 to 40 ° C., and ΔA (= t ₂ −t)
₁ ) and / or ΔB (= t ₄ −t ₃ ) is 1 to 10 ° C. (preferably 1 to 7 ° C.), and an arbitrary pigment within each of the above-mentioned temperature ranges must be selected. I do. If the ΔT value is less than 10 ° C., the temperature range for storing and maintaining the alternately changed state of the colored (1) or the colored (2) is too narrow, and is alternately changed by a slight temperature change, and is careless in a normal state. Undesired colors are undesirably exposed. The upper limit of the ΔT value is 4
A temperature of about 0 ° C. is sufficient as a color holding temperature range in the living temperature range, and does not require any further holding temperature range. Here, the thermochromic pigment applied to the present invention itself exhibits a tautomeric color change between color development and decoloration, so that a colorant (a non-thermochromic general-purpose dye, pigment, etc.) is used together. Thereby, the color (1) and the color (2) can be configured so as to exhibit an alternating color change. ΔA value, ΔB
By specifying the value in the range of 10 ° C. or less, the sensitivity at the time of alternation is increased, the undesired color of the intermediate color between the colored (1) and the colored (2) is exposed, and the temperature range in which the color stays is narrowed. In addition, the intended completely colored (1) and the completely colored (2) are promptly changed alternately, and visual defects of intermediate colors are minimized. The colored (1) or colored (2)
Is black, brown, blonde, or any color of red is general, but is not limited to the above color,
Blue, yellow, pink, other colors, and those set to various color densities are effective.

In the filament constituting the wig of the present invention, one of the above-mentioned colored (1) and colored (2) aspects is alternatively completely maintained at least in an environmental temperature range of 20 ° C. to 30 ° C. The color (1) or the color (2) is alternatively and invariably held in a daily living environment temperature range within a range satisfying the above-mentioned ΔT value. Wigs can be configured.

The thermochromic pigment includes (a) an electron-donating color-forming organic compound, (b) an electron-accepting compound, and (c)
Japanese Patent Publication No. 4-1715, proposed by the present applicant, in which a reversible thermochromic composition comprising a homogeneous compatibilizer of a reaction medium for determining the temperature at which the two coloration reactions occur is encapsulated in microcapsules.
4, JP-A-7-179777, JP-A-7-179
Among the pigments described in 33997 and the like, a pigment satisfying the above requirements can be selectively used. The thermochromic pigment is in the form of fine particles containing the three components (a), (b), and (c), for example, a granular material blended with a binder resin or the granular material is coated with another resin. The above-mentioned microcapsule form is most effective because it exhibits clear and high color density, and is excellent in homogeneity, dispersion stability, chemical resistance and the like. .

As a means for encapsulating the thermochromic composition in microcapsules, known encapsulation methods such as an interfacial polymerization method, an interfacial polycondensation method, an in situ method, and a coacervate method are applied. The particle size of the thermochromic pigment to be applied is in the range of 0.5 to 30 μm, preferably 1 to 1 μm.
When the thickness is within the range of 0 μm, it is effective in terms of sharpness of discoloration, durability, workability, and the like. In a system having a particle diameter of more than 30 μm, it is difficult to maintain uniform dispersibility.
In a system of less than 5 μm, even if a thermochromic pigment microencapsulated in a state of being suspended in an aqueous medium can be obtained, it is difficult to isolate the encapsulated pigment by filtration or centrifugation. In addition, the strength is insufficient. In the encapsulated thermochromic pigment of the present invention, it is desirable that the thermochromic composition / microcapsule wall film is in the range of 7/1 to 1/1 (weight ratio). If the ratio of the thermochromic composition is greater than the above range, the thickness of the wall film is too thin,
The protective function of the contained thermochromic composition is reduced.
On the other hand, when the ratio of the wall film is larger than the above range, the wall film strength is improved, and the protective function is enhanced, but the color density is lowered due to a decrease in the relative ratio of the thermochromic composition, which is not preferable. . The thermochromic pigment in the form of microcapsules,
Although it may be a sphere having a perfect circular cross section, at least a part of the outer surface has a depression as in the illustrated example (FIGS. 3 to 5),
The non-circular cross-sectional shape is appropriately elastically deformed by the external pressure, can relieve the pressure, and has the effect of suppressing the destruction of the capsule membrane. In addition, the pressure is relieved in combination with the elastic deformability, and the wall film is not broken, so that the desired thermochromic function can be effectively exhibited.

The thermochromic pigment is used in an amount of 0.1 to 30% by weight (preferably 0.5 to 25% by weight, more preferably 2 to 20% by weight) based on the fiber-forming polymer to be blended.
% By weight). If it is less than 0.5% by weight, favorable discoloration properties and color density cannot be obtained, and the discoloration function cannot be satisfied. On the other hand, if the amount exceeds 30% by weight, no remarkable improvement in the discoloration density is observed, and the fluidity during fiberization is remarkably reduced, and the spinnability is extremely deteriorated.

In the filament of the present invention, conventionally known flame retardants and stabilizers can be appropriately blended. As the flame retardant, for example, perchloropentacyclododecane, ethylenediamine hydroxide, pentabromomonochlorocyclohexane, pentabromotoluene,
Halogen compounds such as hexabromobenzene, 2,2 bis [4- (2,3 dibromopropoxy) -3,5 dibromophenyl] propane, tris (2,3 dibromopropyl) phosphate, phosphorus compounds, stannous oxide, oxidation Selected from tin compounds such as stannic, molybdenum oxide, molybdenum compounds such as ammonium octamolybdate, ammonium decamolybdate, calcium molybdate, and zinc molybdate, and antimony compounds such as antimony trioxide, antimony pentoxide, and antimony soda. Known compounds can be applied, or one or a combination of two or more can be used.
5% by weight can be blended and applied by a conventional method. When the filament is in the form of a composite fiber, an appropriate amount of a flame retardant satisfying the above range can be blended in the core (A) and / or the sheath (B). As stabilizers, oxidation stabilizers, benzotriazole compounds, ultraviolet stabilizers such as hindered amine compounds, metal deactivators,
Processing stabilizers such as phosphorus compounds can be mentioned, and appropriate amounts can be blended by a conventional method.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The color chromatic wig of the present invention is composed of the above-described color chromic filaments, and can also be composed by blending with a non-thermochromic fiber at an appropriate ratio.

[0020]

EXAMPLES Examples are described below. As the thermochromic pigments in the examples, the pigments exemplified in FIGS. 3 to 5 in the form of microcapsules having an average particle diameter of 5 to 10 μm were arbitrarily selected and applied, but application of a circular cross section is not refused. In addition, the composition in an Example shows a weight part.

Example 1 Thermochromic pigment (t ₁ : 10 ° C., t ₂ : 15 ° C., t ₃ : 4)
0 ° C., t ₄ : 46 ° C., ΔT: 25 ° C., ΔA: 5 ° C., Δ
B: has a discoloration characteristic of 6 ° C., exhibits a brown color at the time of color development, and changes to colorless at the time of color erasure) 5 parts, a dispersant 1 part, a brominated flame retardant 5 parts, a yellow-brown general pigment 0.01 Part and 89 parts of a polypropylene-ethylene copolymer having a flexural modulus of 1030 MPa were melt-mixed at 200 ° C. with an extruder to obtain a thermochromic pellet. Next, the pellet was spun at 200 ° C. using a general-purpose melt spinning apparatus to obtain a thermochromic multifilament consisting of 20 single yarns having an outer diameter of 80 μm. The multifilament has a supple touch and is processed into a false hair state by a conventional method. When cooled to 10 ° C. or less, it exhibits a brown color, and when heated to 46 ° C. or more, it becomes a blonde. The colors were alternately displaced, and any one of the above colors could be selectively stored and held in an environment temperature range of 15 ° C to 40 ° C.

Example 2 Instead of 89 parts of the polypropylene ethylene copolymer of Example 1, a blend resin of 50 parts of a polypropylene homopolymer having a flexural modulus of 1670 MPa and 39 parts of low density polyethylene having a flexural modulus of 245 MPa (flexural modulus of about 1
A thermochromic multifilament was obtained in the same manner as in Example 1 except that 050 MPa) was used. The multi-filament sewn and finished into a wig has flexibility as pseudo-hair and moderate flexibility.
It exhibited the same color reversal as, and could selectively store either brown or blonde colors.

Example 3 Thermochromic pigment (t ₁ : 14 ° C., t ₂ : 17 ° C., t ₃ : 3)
5 ° C., t ₄ : 40 ° C., ΔT: 18 ° C., ΔA: 3 ° C., Δ
B: It has a discoloration characteristic of 5 ° C., exhibits a pink color at the time of color development, and changes to colorless at the time of decoloration) 3 parts, a dispersant 1 part, a brominated flame retardant 3 parts, a yellow-brown general pigment 0.01 , A polypropylene-ethylene copolymer having a flexural modulus of 1600 MPa and 80 parts of a styrene thermoplastic elastomer having a flexural modulus of 118 MPa were melt-mixed with an extruder at 200 ° C to obtain thermochromic pellets. Next, the pellets were subjected to a conventional melt spinning apparatus for 200 hours.
This was spun at ℃ to obtain a thermochromic multifilament consisting of 20 single yarns having an outer diameter of 70 μm. The multifilament has a supple touch and is processed into a wig by a conventional method. The wig has a pink color when cooled to 14 ° C or lower, and a blond color when heated to 40 ° C or higher. Any of the above colors could be selectively stored and stored in an environment temperature range of 17 ° C to 35 ° C.

Example 4 A thermochromic multifilament was obtained in the same manner as in Example 3 except that a polyolefin resin as a base resin was blended with 1.0% by weight of 6-12 copolymerized nylon. Was. The wig made of the thermochromic multifilament exhibited the same pink and blond alternation as in Example 3, but the residual color at the time of decolorization of pink was significantly reduced, and It had a clear blonde color with no trace.

Example 5 3 parts of the thermochromic pigment used in Example 3, 1 part of a dispersant,
0.01 parts of a yellow-brown general pigment and 12 having a melting point of 180 ° C.
96 parts of nylon were melt-mixed at 200 ° C. with an extruder to obtain thermochromic pellets. Next, the pellets were spun at 200 ° C. using a general-purpose melt spinning apparatus to obtain a thermochromic multifilament composed of 20 70 μm single yarns. The wig formed by using the thermochromic multifilament, as in Example 3, exhibits a pink color when cooled to 14 ° C. or less, and alternately discolors to a blond color when heated to 40 ° C. or more, In the environmental temperature range of 17 ° C. to 35 ° C., any one of the above colors could be selectively stored and held.

Example 6 8 parts of the thermochromic pigment used in Example 1, 1 part of a dispersant,
5 parts of a brominated flame retardant, 0.02 parts of a yellow-brown general pigment, and 89 parts of a polypropylene-ethylene copolymer having a flexural modulus of 1030 MPa were heated at 200 ° C. with an extruder.
To obtain thermochromic pellets. The thermochromic pellet was extruded into a core forming extruder, and the bending elastic modulus was 10
A 30 MPa polypropylene-ethylene copolymer is supplied to the extruder for forming the sheath portion, and each is spun at 200 ° C. from an 18-hole discharge port using a composite fiber spinning apparatus, and 18 single yarns having an outer diameter of 90 μm are obtained. Was obtained. The obtained conjugate fiber is rich in gloss, and the false hair using the same has a brown color when cooled to 10 ° C. or less as in Example 1, and when heated to 46 ° C. or more,
The color was alternately displaced to the color of blonde, and any one of the above colors could be selectively stored and stored in an environment temperature range of 15 ° C to 40 ° C.

Example 7 5 parts of the thermochromic pigment used in Example 3, 1 part of a dispersant,
0.02 parts of a tan general pigment, and 12 having a melting point of 180 ° C
94 parts of nylon were melt-mixed at 200 ° C. with an extruder to obtain thermochromic pellets. The thermochromic pellet was placed in an extruder for molding a core portion,
(2) 94 parts of nylon were supplied to the extruder for forming a sheath portion, respectively, and each was heated at 200 ° C. using a conjugate fiber spinning apparatus.
The fiber was spun from eight discharge ports to obtain a thermochromic conjugate fiber consisting of 18 single yarns having an outer diameter of 90 μm. The obtained conjugate fiber is rich in luster, and the hair using the same has a pink color when cooled to 14 ° C. or less, and alternately discolors to a blond color when heated to 40 ° C. or more, and 17 ° C. In the environmental temperature range of ~ 35 ° C, any one of the above colors could be selectively stored and held.

Example 8 Thermochromic pigment (t ₁ : 15 ° C., t ₂ : 17 ° C., t ₃ : 3)
2 ° C., t ₄ : 34 ° C., ΔT: 15 ° C., ΔA: 2 ° C., Δ
B: Discoloration characteristic of 2 ° C., yellowish green at the time of color development, colorless at the time of decoloration) 3 parts, 1 part of dispersant, 5 parts of brominated flame retardant, 0.2 parts of pink general pigment , And melting point 180
96 parts of 12 ° C nylon 2 with an extruder
The mixture was melted and mixed at 00 ° C. to obtain thermochromic pellets. Next, the pellets were subjected to a conventional melt spinning apparatus for 200 hours.
This was spun at 20 ° C. to obtain a thermochromic multifilament consisting of 20 single yarns having an outer diameter of 80 μm. The multifilament has a supple feel and is processed into a wig by a conventional method. When cooled to 15 ° C or less, the blond color [color (1)] becomes pink when heated to 34 ° C or more. The color [color (2)] was alternately exhibited, and any one of the above colors could be selectively stored and held in an environment temperature range of 17 ° C to 32 ° C.

Example 9 Thermochromic pigment (t ₁ : 14 ° C., t ₂ : 17 ° C., t ₃ : 3)
5 ° C., t ₄ : 40 ° C., ΔT: 15 ° C., ΔA: 3 ° C., Δ
B: has a discoloration characteristic of 5 ° C., exhibits black when colored, and changes to colorless when decolored) 3 parts, 1 part of dispersant, 5 parts of brominated flame retardant, 0.4 parts of general brown pigment, and 6 with a melting point of 160 ° C
-12 Nylon 94 parts with extruder 18
The mixture was melted and mixed at 0 ° C. to obtain thermochromic pellets. next,
The pellet was spun at 180 ° C. using a general-purpose melt spinning apparatus to obtain a thermochromic multifilament consisting of 20 single yarns having an outer diameter of 80 μm. The multifilament has a supple touch and is processed into a wig by a conventional method. The wig has a black color when cooled to 14 ° C or less, and changes to a brown color when heated to 40 ° C or more. And any one of the above colors could be selectively stored and held in an environment temperature range of 17 ° C. to 35 ° C.

Example 10 10 parts of an acrylonitrile-based polymer was dissolved in 85 parts of a 50% by weight aqueous solution of rhoda soda, and 5 parts of the thermochromic pigment used in Example 1 and 0.01 part of a yellow-brown general pigment were added. And uniformly dispersed, and the spinning solution was wet-spun under conventionally known conditions to obtain a thermochromic acrylic filament having an outer diameter of 60 μm. The false hair using the filament exhibited the same color reversal as in Example 1, and could selectively store and retain either the brown or blonde color.

Example 11 A thermochromic pigment used in Example 1 was applied to a polymer comprising 48 parts of acrylonitrile, 51 parts of vinyl chloride, and 1.0 part of sodium styrenesulfonate by applying a known method for producing a modacrylic fiber. 15 parts dispersed uniformly, outer diameter 60
A thermochromic modacrylic fiber-based filament of μm was obtained. When the wig was finished by a conventional method using the filament and put to practical use, the same color reversal as in Example 1 was exhibited, and one of the colors of brown and blonde could be selectively stored and retained.

[0032]

According to the present invention, the wig composed of the color-chromic filaments of the present invention can be easily heated by a user (for example, a hair dryer, a hair curler, a refrigerator, cold water,
Hot water, etc.), the color (1) and the color (2) can be alternately displaced to different colors, and the displaced color is an alternative at least in an environmental temperature range of 20 ° C. to 30 ° C. The wig is invariable and can be put to practical use with security, and a single wig can function as two kinds of wigs having different colors. Above all, the system to which the filament of the composite fiber form is applied is rich in gloss,
In addition to satisfying the durability of the thermochromic function, it prevents the thermochromic components and additives from directly touching the skin, which is effective from the viewpoint of hygiene and safety, and is practical as a color-tonic wig Satisfy the nature.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional explanatory view showing an example of a cross-sectional shape of a filament constituting a color-changing wig of the present invention.

FIG. 2 is a graph illustrating the color change behavior of a thermochromic pigment applied to the present invention.

FIG. 3 is an enlarged explanatory view of (a) an appearance and (b) a cross section showing an example of a thermochromic microcapsule pigment applied to the color-neutral wig of the present invention.

FIG. 4 is an enlarged explanatory view of (a) the appearance and (b) a cross section showing an example of a thermochromic microcapsule pigment applied to the color-neutral wig of the present invention.

FIG. 5 is an enlarged explanatory view of (a) an appearance and (b) a cross section showing an example of a thermochromic microcapsule pigment applied to the color-neutral wig of the present invention.

[Explanation of symbols]

Filaments A core B sheath 2 thermochromic micro recesses encapsulated pigment 21 thermochromic composition 22 wall membrane 23 t ₁ complete coloring temperature t ₂ color start temperature t ₃ decoloring starting temperature t constituting one color tautomeric wig ₄ Complete decoloring temperature ΔH Hysteresis temperature width ΔT Substantial color holding temperature width

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D01F 8/12 D01F 8/12 Z

Claims (11)

[Claims] 1. By applying heat or cold heat, a color (1) and a color (2) can be alternately displaced to different colors, and any of the displaced color (1) or color (2) can be used. A color chromochromatic wig that is alternatively stored in an environment temperature range of at least 20 ° C. to 30 ° C., wherein the thermochromic pigment is blended in a dispersed state in the fiber-forming polymer. Formed of filaments having an outer diameter of 30 to 200 μm, wherein the filaments contain 0.1 to 30% by weight of a thermochromic pigment, and the thermochromic pigment has a temperature of - and decoloring shows a 12 to 60 ° C. hysteresis width ΔH is the color density curve, complete coloring temperature t _1, color development initiation temperature t _2, the decoloring starting temperature t
_3, complete decoloring when the temperature t _4, substantially color holding temperature range ΔT (= t ₃ -t ₂₎ is is 10 to 40 ° C., and,
ΔA (= t ₂ −t ₁ ) and / or ΔB (= t ₄ −t ₃ ) is 1
A color-neutral wig, wherein an arbitrary pigment satisfying the above-mentioned respective temperature ranges of from 10 to 10 ° C. is selected. 2. A fiber-forming polymer comprising a polyolefin resin and / or a thermoplastic resin blended with the polyolefin resin, and having a flexural modulus of 300 MPa to 15 MPa.
2. The color-neutral wig according to claim 1, which is in the range of 00 MPa. 3. The color chromatic wig according to claim 2, wherein the polyolefin resin is selected from a polypropylene-ethylene random copolymer, a block copolymer, and a blend resin of polypropylene and polyethylene. 4. The thermoplastic resin is a resin selected from ethylene-vinyl acetate copolymer resin, acrylate resin, ethylene-acrylate copolymer resin, or a polyester resin, polyamide resin, polyurethane resin, or styrene resin. 3. The color chromatic wig according to claim 2, which is a selected elastomer. 5. The color chromatic wig according to claim 1, wherein the fiber-forming polymer is a polyamide resin selected from nylon 6, nylon 66, nylon 12, and nylon 6-12 copolymer. 6. The filament is in the form of a core-sheath composite fiber comprising a core blended with a thermochromic pigment and a sheath unblended with a thermochromic pigment.
The described color-chromic wig. 7. The color chromatic wig according to claim 6, wherein the core and the sheath are made of polyolefin resins or polyamide resins. 8. The thermochromic pigment comprises (a) an electron-donating color-forming organic compound, (b) an electron-accepting compound, and (c) a homogeneous reaction medium which determines the temperature at which the color reaction of the two occurs. 2. The color-neutral wig according to claim 1, which is a pigment in the form of microcapsules, in which a reversible thermochromic composition comprising a compatible material is encapsulated in microcapsules. 9. The color-chromic wig according to claim 8, wherein the thermochromic pigment is a pigment in the form of a capsule having a non-circular cross-sectional shape having a depression on at least a part of the outer surface. 10. The color chromatic wig according to claim 1, wherein the colored (1) or the colored (2) is any one of black, brown, blonde, or red. 11. The flame retardant is added to the filament in an amount of from 1 to 2
The color-neutral wig according to any one of claims 1 to 10, which is mixed and dispersed in an amount of 5% by weight.