JP2556062Y2 - Thermochromic laminate with iris pattern - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermochromic laminate having an iris pattern. More specifically, the present invention relates to a thermochromic laminate for visualizing various iris patterns that change color with a change in temperature.

[0002]

2. Description of the Related Art Conventionally, due to temperature change, color ← → colorless,
Alternatively, a thermochromic material showing a color change of colored [1] ← → colored [2] or a colored body processed with the thermochromic material,
It is widely known and is used in various fields such as the temperature detection field, the toy field utilizing the taste of strangeness and unexpectedness, and the teaching material field (JP-B-51-44706, JP-B-52-7).
764, JP-B-51-46548, JP-A-62-140881, etc.).

[0003]

SUMMARY OF THE INVENTION According to the present invention, the color change effect of the conventional thermochromic material described above is more effectively exhibited, and the decorativeness, the variety of color change, the taste of color change, and the unexpectedness are further enhanced. It is an object of the present invention to provide a thermochromic material which can be applied to various fields such as a field of decoration, a temperature indicator, a field of toys, and the like.

[0004]

SUMMARY OF THE INVENTION The present invention requires a thermochromic laminate 1 having an iris pattern, in which a transparent iris thin film layer 3 is laminated on a thermochromic layer 2.

The structure of the present invention will be described with reference to the drawings. The thermochromic layer 2 is formed on a support 4 (transparent or opaque layer), and a transparent iris thin film layer 3 is laminated on the thermochromic layer 2 (FIG. 1). The structure laminated on the back surface of the thin film layer 3 (FIG. 2), the support 4 itself forms the thermochromic layer 2 (a support formed by blending a thermochromic material, a porous support and a thermochromic material And the like (see FIG. 3).

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

The thermochromic layer 2 comprises a thermochromic material containing a conventionally known thermochromic dye, for example, a liquid crystal, an electron-donating color-forming organic compound, an electron-accepting compound, and a color-forming reaction between the two. Thermochromic material containing three components of an organic compound medium capable of reversibly generating a thermochromic material or a thermochromic material exhibiting thermochromic properties in the form of fine particles of a resin solid solution of the component (for example, Japanese Patent Publication No.
1-354414, JP-B-51-44706, JP-B-1-29398 and the like. 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 returns to the state exhibited in the normal temperature range when the heat or cold is no longer applied (so-called state). This is a type in which a small hysteresis width for temperature-color density due to a temperature change is displayed and the color is changed.

[0008] Further, Japanese Patent Application Laid-Open No.
No. 264285 describes a thermochromic material containing a color-memorizing thermochromic dye which exhibits a large hysteresis characteristic and changes color (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, a state changed at a temperature below the low-temperature side discoloration point or above the high-temperature side discoloration point can be stored and stored).

The thermochromic dye or the 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. A desired thermochromic layer is formed on the body surface. Further, the microcapsules may be dispersed in a thermoplastic or thermosetting resin.

As the transparent iris thin film layer 3, a conventionally known structure is effective. Specifically, a transparent thin film layer composed of a transparent thin film layer and an uneven transparent thin film layer (the transparent thin film layer is made of titanium oxide, silicon oxide, zinc oxide, antimony oxide, zinc sulfide, magnesium fluoride, fluoride fluoride). Metal compound thin film layers exemplified by calcium, etc., copolymers of vinylidene chloride with vinyl chloride, vinyl acetate, vinyl alcohol, etc. or polyvinyl chloride, polyvinylidene chloride, polystyrene with any of vinyl chloride, styrene and copolymer, etc. Thin film layer having fine bubbles due to gas generated by decomposition of various thermoplastic resins by light, heat, etc., vinyl-based copolymer, cellulose-based copolymer, urethane-based copolymer and curing Various curing agents, compositions having a curable functional group, a thin film layer composed of an organic-substituted silicon-based compound, and the above organic material and titanium oxide, aluminum oxide Arm,
A transparent thin film layer made of inorganic fine particles such as zirconium oxide has a difference in refractive index from the thin film layer of 0.05 or more and a visible light transmittance of about 10% or more. An uncolored or colored transparent thin film layer, which may have light scattering on the surface and inside of the film and has a visible light transmittance of 50% or more: JP-A-61-2
No. 27098], an optical interference pattern film provided with a vapor deposition layer comprising one or more of oxides, sulfides and fluorides on one or both surfaces (Japanese Patent Application Laid-Open No. 60-32645), two or more types A transparent multilayer film exhibiting an optical interference phenomenon in which at least 100 layers made of polymers having different refractive indices are provided in the intermediate layer (USA: THE MEARL CORPORATION)
Product name: MEARL IRIDESCENT FI
LM) and the like.

Although the thermochromic layer 2 can be directly provided on the back surface of the transparent iris thin film layer 3, the thermochromic layer 2 is practically used by being joined to the support 4 provided with the thermochromic layer 2. An iris transfer foil [for example, a transfer foil having a protective resin layer and an iris thin film layer provided directly or via a release layer on a sheet substrate (Japanese Patent Application Laid-Open No. 61-69499)] Can be used to transfer and join the transparent iris thin film layer 3. As the support 4, all objects such as woven fabric and other fiber materials, paper, plastic, glass, ceramics, and wood are effective. The configuration of the combination of the iris thin film layer 3 and the thermochromic layer 2 is as follows.
Not limited to the embodiments shown in FIGS. 1 to 3, those formed in a wavy shape (see FIG. 4), irregularities (see FIG. 5), partial portions (see FIG. 6),
Further, a configuration (not shown) in which a transparent film or the like is interposed between the iris thin film layer 3 and the thermochromic layer 2 is effective.

[0012]

The color effect of the transparent iris thin film layer 3 and the color change due to the temperature change of the thermochromic layer 2 are fused to make various iris color changes visible. Depending on the color of the underlayer of the transparent iris thin film layer 3 (the color of the thermochromic layer 2 and the color of the non-color-changing layer seen in the bleached state of the thermochromic layer 2), the appearance that is viewed varies in various ways. That is, when the base is black, the transmitted light is absorbed and the interference light is emphasized, so that the gloss is enhanced. On the other hand, when the base is white, the interference light disappears due to the reflected light from the white surface. In the case where the background is colored, the interference light and the background color interact with each other, so that the color can be seen more clearly, and the color that has variously changed depending on the viewing angle can be seen. The above-mentioned characteristics are combined with the color change of the thermochromic layer 2 to influence each other and make various changes in appearance visible.

Example 1 Thermochromic pigment showing a change from black to colorless at 30 ° C.
30 parts were dispersed in 70 parts of an acrylic emulsion, and screen-printed on a cotton cloth to obtain a thermochromic cotton cloth (changed from black to white at 30 ° C.). Next, the MEARL IRIDESCENT F, which exhibits iris due to the light interference phenomenon.
An acrylic resin emulsion was applied to ILM (trade name: IF-8101), and the thermochromic cotton cloth was joined to obtain a thermochromic laminate. The thermochromic laminate had opal luster, and was white at 30 ° C or higher and black at 30 ° C or lower. The parts in the formulation examples are parts by weight, and the same applies to the following. Example 2 The same FILM and polyester knitted fabric as in Example 1 were joined with a polyurethane-based adhesive, and the same thermochromic ink as in Example 1 was applied from the knitted fabric side. Above ° C, a knitted fabric having a black color and an opal luster was obtained.

Example 3 Thermochromic pigment 15 showing a change from blue to colorless at 15 ° C.
Parts, 0.7 parts of a pink fluorescent pigment were dispersed in 50 parts of an epoxy resin to obtain an epoxy ink showing a pink color change at 15 ° C. or more and a purple color change at 15 ° C. or less. An amine-based curing agent (20 parts) was mixed with the epoxy ink (50 parts), and printing was performed on urethane-based leather by screen printing. Before curing, Rainbow Film (Toyo Metallizing,
A transfer film, trade name: RB-6001) is laminated and cured, and then the transfer film is peeled off. The urethane synthetic leather having a pink color at 15 ° C. or more, a purple color at 15 ° C. or less, and a lacquered luster is obtained. Obtained.

Example 4 The urethane synthetic leather obtained in Example 3 was embossed and the surface was roughened to further improve the glossiness.

Example 5 Thermochromic color memory pigment [decolorization temperature 30 ° C., coloring temperature 1
5 ° C: shows red color when colored), 50 parts of an acrylic resin / 45 parts of xylene solution, 20 parts of xylene and 20 parts of methyl isobutyl ketone are stirred and mixed, and spray-coated on a white vinyl chloride sheet with a spray gun. Then, a thermochromic layer 2 having a thickness of about 40 μm was provided. Next, the MEEARL
An acrylic resin emulsion was applied to IRIDEENT FILM and bonded to obtain a thermochromic sheet.
In the thermochromic sheet, the thermochromic layer 2 is colored red at a temperature of 15 ° C or lower, is maintained in a red color state at a temperature range of 30 ° C or lower, and disappears at a temperature of 30 ° C or higher, and the white color of the base is changed. And in an environment of 15 ° C. to 30 ° C., the above aspect is maintained. The color change of the thermochromic layer 2 and the iris pattern are visually combined to diversify the color change.

[0017]

As described above, the laminate of the present invention can be effectively expressed by combining a thermochromic material and an iris thin film layer exhibiting an iris pattern without deteriorating the characteristics of each other, and the woven fusion of the two can be achieved. It is possible to provide a novel and decorative thermochromic material that allows the visualized color change to be visualized, and can be applied to various fields such as the toy field, the decoration field, clothing, and the textile material field.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional explanatory view of a first embodiment of the laminate of the present invention.

FIG. 2 is an enlarged sectional explanatory view of a second embodiment of the laminate of the present invention.

FIG. 3 is an enlarged sectional explanatory view of a third embodiment of the laminate of the present invention.

FIG. 4 is an enlarged sectional explanatory view of a fourth embodiment of the laminate of the present invention.

FIG. 5 is an enlarged sectional explanatory view of a fifth embodiment of the laminate of the present invention.

FIG. 6 is an enlarged cross-sectional explanatory view of a sixth embodiment of the laminate of the present invention.

[Explanation of symbols]

 Reference Signs List 1 thermochromic laminate exhibiting iris pattern 2 thermochromic layer 3 transparent iris thin film layer 4 support

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B44C 3/02 B44C 3/02 A // B32B 33/00 B32B 33/00 B41M 5/26 B41M 5 / 18 102 5/30

Claims (1)

(57) [Scope of request for utility model registration] 1. A transparent iris thin film layer is laminated on a thermochromic layer, and the color of the thermochromic layer is changed through the transparent iris thin film layer.
A thermochromic laminate exhibiting an iris pattern , characterized in that it is configured to be visible .