JP2556071Y2 - Metallic thermochromic false nails - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a metallic thermochromic false nail. More specifically, the present invention relates to a thermochromic false nail exhibiting a metallic color tone due to a temperature change.

[0002]

2. Description of the Related Art An artificial nail discolored by a change in temperature is disclosed in Japanese Utility Model Laid-Open Publication No. Hei 1-282808, proposed by the present applicant. However, a thermochromic false nail exhibiting a color change from gold or silver or a metallic color [1] ← → metallic color [2] has not been disclosed yet.

[0003]

[Problems to be Solved by the Invention] The present inventor has pursued means and methods for more effectively exhibiting the color change effect of the thermochromic material, and as a result, the above-mentioned metallic color change has been reversibly performed. It is an object of the present invention to find a means and a requirement for visualization, and to provide a thermochromic false nail exhibiting an unprecedented color change, which further enhances color diversification, taste by color change, and unexpectedness.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided an artificial nail which changes its color due to a change in temperature.
μm to 400 μm (preferably 3 μm to 200 μm)
The thickness of the pearlescent pigment layer 3 is laminated on the metallic thermochromic false nail 1 (see FIGS. 1 to 3).

[0005] A laminated structure of the combination of the thermochromic layer 2 and the pearlescent pigment layer 3 will be described below. The thermochromic layer 2 is formed on a support 4 (a transparent layer or an opaque layer), the pearlescent pigment layer 3 is laminated on the thermochromic layer 2, and the support 4 itself forms the thermochromic layer 2 (thermochromic layer). A structure in which a thermochromic material is impregnated and fixed in a support formed by blending a color-changing material or a porous support), and a pearlescent pigment layer 3 is provided on the back surface of the support 4 (transparent layer). It is possible to exemplify a configuration in which the thermochromic layer 2 is formed on the pearlescent pigment layer 3. The support 4 may be a base such as a false nail base or a member such as a sheet material attached to the false nail.

In the above-described structure, a non-thermochromic layer is appropriately provided below the thermochromic layer 2 so that the color change of the thermochromic layer 2 due to the color change can be more variously visualized.

The clear coat layer 5 is formed on the front or back surface layer.
Alternatively, a laminate layer or the like can be appropriately laminated, and a transparent laminate layer can be interposed between the thermochromic layer 2 and the pearlescent pigment layer 3.

The thermochromic layer 2 is made of a thermochromic material containing a conventionally known thermochromic dye, such as a liquid crystal, an electron donating electron donating organic compound, an electron accepting compound, and both of them. A thermochromic material containing three components of an organic compound medium that reversibly causes a color reaction or a thermochromic material exhibiting thermochromic properties in the form of fine particles of a resin solid solution of the component (for example, JP-B-51-35414) Gazette, Japanese Patent Publication No. 51-44
706 and Japanese Patent Publication No. 1-29898). The color changes before and after a predetermined temperature (color change point), and only one specific state can exist in a normal temperature range between the two states before and after the change. That is, the other state is maintained while the heat or cold required for the state to appear is applied, but when the heat or cold is no longer applied, the state returns to the state exhibited in a normal temperature range, so-called. ,
This type changes color by showing a small hysteresis width for temperature-color density due to temperature change.

Further, Japanese Patent Application Laid-Open No.
No. 264,285 describes a thermochromic material containing a color-memorizing thermochromic dye exhibiting a large hysteresis characteristic and discoloring (that is, the shape of a curve plotting a change in coloring density due to a temperature change indicates a temperature. A type in which the color changes following a significantly different path between a case where the temperature is increased from a temperature lower than the color changing temperature range and a case where the temperature is lowered from a temperature higher than the color changing temperature range: a low-temperature color changing point and a high-temperature color changing point In the normal temperature range between the above, the color changed at a temperature lower than the low-temperature side discoloration point or higher than the high-temperature side discoloration point can be stored and stored).

The thermochromic dye or color-memorizing thermochromic dye described above is usually encapsulated in a microcapsule, dispersed in a medium containing a binder, applied as a color material such as ink or paint, and supported. The desired thermochromic layer 2 is formed on the surface of the body 4.

[0013] The microcapsules may be dispersed in a thermoplastic or thermosetting resin. Incidentally, a pearlescent pigment can be appropriately dispersed in the thermochromic layer 2.

The pearlescent pigment layer 3 can be formed by coating with a printing ink or paint containing the pearlescent pigment. A film formed by blending the pearlescent pigment with a transparent or translucent resin or the like, or a relatively thin molding is used. It may be formed as a body.

As the pearlescent pigment, conventionally known mica such as titanium dioxide-coated mica, iron oxide-titanium dioxide-coated mica, iron oxide-coated mica, guanine, sericite and the like having an appropriate particle size of 3 to 200 μm can be applied. It is dispersed in a medium containing a binder and applied in the form of a paint, ink or the like. Alternatively, the pigment may be contained in a dispersed state in a thermoplastic resin or a thermosetting resin.

The thickness of the pearlescent pigment layer 3 is 1 μm to 40 μm.
It is 0 µm, preferably 3 µm to 200 µm, and the content of the pearlescent pigment in the layer is 0.1 to 40% by weight (preferably 0.2 to 30% by weight).

As the means for dispersing the pearlescent pigment and fixing it to the surface of the support 4 as described above, conventional means can be appropriately selected and put to practical use.

The artificial nail, which is the support 4, is attached to the surface of the raw nail with a pressure-sensitive adhesive layer interposed on the back surface of an artificial nail such as a plastic sheet or metal piece formed into an appropriately shaped sheet material or nail shape. And a type in which an artificial nail having a concave portion into which the tip of a raw nail is inserted is detachably fitted.

[0019]

Since the pearlescent pigment layer 3 is provided on the surface of the artificial nail and the thermochromic layer 2 is laminated on the back of the pearlescent pigment layer 3, the color change of the thermochromic layer 2 is determined by the pearlescent pigment. Layer 3
Visualize through. Here, the iris effect caused by the selective interference of the visible light wavelength of the pearlescent pigment, the transmission effect and the color change of the color due to thermal discoloration are intricately combined,
Visualize various metallic tones. This point will be described for a pearlescent pigment in which the surface of natural mica is coated with titanium dioxide. The reflected light at the time of interference varies depending on the thickness of the titanium dioxide coating layer. For example, titanium dioxide-coated mica prepared to selectively reflect yellow light and transmit blue light has a black base, and when the base is black, the transmitted blue light is absorbed by the base black and the yellow light Only the reflection reflects gold. On the other hand, when the base is white, the transmitted blue light is also reflected by the white of the base, reflects not only yellow light but also blue light, and reflects all wavelengths of visible light. You. Therefore, by disposing the thermochromic layer 2 on the base and changing the base from black to white, the change of gold to white is visually recognized. By the same operation as described above, various kinds of color changes are visually recognized as exemplified in the embodiment.

The thermochromic layer 2 is transparent, and allows the color layer laminated thereunder to be visually observed simultaneously with the thermochromic. In addition, the thermochromic layer 2 further diversifies the color change in a combination that produces a color change of colored [1] ← → colored [2].

In a system in which the lower colored layer (including characters, patterns, etc.) is concealed in the colored state of the thermochromic layer 2, the light reflecting effect of the pearlescent pigment layer 3 makes it possible to reduce the concealing effect of the thermochromic layer 2 alone. To improve the concealment effect.

[0022]

EXAMPLE 1 A thermochromic color memory spray paint [thermochromic color memory pigment (black ← → colorless, color erasing temperature 38 ° C., coloring temperature 15 ° C.) 15 on the surface of an artificial nail made of acetylcellulose resin was used.
Parts, general color fluorescent pink pigment 3 parts, 50% acrylic resin /
A spray paint (composed of 40 parts of xylene solution, 10 parts of xylene and 30 parts of methyl isobutyl ketone) is sprayed by hand spray, and then a pearlescent pigment-containing spray paint (HI-LITE colors GOLD, manufactured by TheMeal Corporation, USA) 3 parts of a pearlescent pigment, 40 parts of a 50% acrylic resin / xylene solution, 10 parts of xylene, and 30 parts of methyl isobutyl ketone) to obtain a thermochromic color memory artificial nail.

Parts in the above and following formulation examples indicate parts by weight. The thermochromic color memory artificial nail obtained was golden at 15 ° or less, but turned into pearl pink when heated to 38 ° C or more, and maintained at room temperature. Next, when it was cooled to 15 ° C. or less, it turned gold again, and this state was maintained at room temperature. That is, one false nail has two colors, and the user can appropriately select and apply it. Since the high-temperature side discoloration point was 38 ° C., no discoloration due to body temperature or environmental temperature was observed under normal conditions, and the selected color could be stably maintained.

Example 2 A pink and blue heart mark was printed on a pale yellow polyamide resin false nail with a common color tampon ink, and a thermochromic color memory spray paint [thermochromic color memory pigment ( Black ← → colorless, low-side color change temperature 17 ° C, high-side color change temperature 32 ° C), 50% acrylic polyol / xylene solution 40 parts, polyisocyanate-based curing agent 6 parts, xylene 40 parts) are sprayed by hand spray. 3 parts of pearlescent pigment-containing spray paint [Iriodin (trade name of pearlescent pigment of the company) 100 (product number) manufactured by Merck Japan Ltd.], 40 parts of 50% acrylic polyol / xylene solution, polyisocyanate System hardener 6 parts, xylene 40 parts) and finally a glossy clear top coat. A thermochromic color memory artificial nail was obtained. The obtained thermochromic color memory artificial nail has a silver color below 17 ° C., but when heated above 32 ° C., the silver color disappears, and pearl pink and pearl blue heart marks appear on a white pearl background, This condition was maintained at room temperature. Then, when it was cooled to 15 ° C. or less, it became silver again, and this state was maintained at room temperature.

Example 3 Thermochromic pigment [black color → colorless reversible color change (color change point 1
8 ° C.)], 20 parts of a general color pink (fluorescent) pigment, and 1000 parts of high impact polystyrene.
Injection molding was performed at a cylinder temperature of 175 ° C. and a nozzle temperature of 175 ° C. to form a thermochromic false nail 1. Next, a pearlescent pigment [Iriodin 225 manufactured by Merck Japan Ltd.]
(Part number)] 3 parts, 50% acrylic resin / xylene solution 4
0 parts and 40 parts of methyl isobutyl ketone were uniformly mixed with a pearlescent pigment spray paint, and finally a glossy clear top coat was sprayed.

The thermochromic false nail 1 obtained had a pearl pink color in a normal state, and changed to a metallic blue when cooled to 18 ° C. or less. The temperature again exceeded 18 ° C. and returned to the original pearl pink around room temperature. Therefore, the color changes to pearl pink when indoors with false nails attached, and changes to metallic blue when outdoors in winter.

[0027]

[Effect of the Invention] The false nail of the present invention is a color change from gold and silver, and other various colors from metallic color [1] to metallic color [2], which are not found in conventional thermochromic false nails. The change can be visually recognized, the decoration and the taste are satisfied, and the commerciality of this type of false nail is enhanced. In a system in which the thermochromic layer is formed of a color memory pigment, it is possible to freely select any of the two aspects before and after the change in the aspect due to the metallic color change described above and maintain the aspect at room temperature. You can enjoy another false nail with a different appearance with one false nail.

[Brief description of the drawings]

FIG. 1 is a perspective view of a false nail according to the present invention.

FIG. 2 is a perspective view showing a state where the false nail of FIG. 1 has changed to another aspect.

FIG. 3 is an enlarged sectional view of one embodiment of the artificial nail according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metallic thermochromic false nail 2 Thermochromic layer 3 Pearlescent pigment layer 4 Support 5 Clear coat layer

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-149958 (JP, A) JP-A-5-111975 (JP, A) JP-A-5-137849 (JP, A) 24750 (JP, U) Japanese Utility Model 1-72803 (JP, U) Japanese Utility Model 1-82808 (JP, U) Japanese Utility Model 5-43910 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. An artificial nail that changes color due to a change in temperature, wherein a thermochromic layer is disposed on at least a part of the surface, and a pearlescent pigment layer having a thickness of 1 μm to 400 μm is laminated on the thermochromic layer. Metallic thermochromic false nails.