JPH055442U - Thermochromic laminate with iris pattern - Google Patents

Abstract

(57) [Abstract] [Purpose] To more effectively develop the color-changing effect of the conventional thermo-color-changing material, and further enhance the decorativeness, the variety of color changes, the delicacy due to the color change, and the unexpectedness. We provide coloring materials that can be applied to various fields such as the toy field. [Structure] A transparent iris thin film layer 3 is laminated on a thermochromic layer 2 so that a color change of the thermochromic layer can be visually recognized together with an iris pattern.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 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 due to temperature changes.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, a thermochromic material showing a color change ← → colorless or a color change [1] ← → color [2] due to a temperature change and a colored body processed by the thermocolor change material have been widely known. It is used in various fields such as the temperature detection field, the toy field utilizing the strangeness and discoloration of discoloration, the teaching field, etc. (Japanese Patent Publication No. 51-44706, Japanese Patent Publication No. 52-7764, Japanese Patent Publication No. 51-46548). JP-A No. 62-140881, etc.).

[0003]

[Problems to be solved by the device]

 The present invention more effectively develops the color-changing effect of the above-mentioned conventional thermochromic material, further enhances the decorativeness, the variety of color changes, the strangeness due to the color change, and the unexpectedness. It aims to provide thermochromic materials that can be applied to various fields such as fields.

[0004]

[Means for Solving the Problems]

 The present invention requires a thermochromic laminate 1 having an iris pattern in which a transparent iris thin film layer 3 is laminated on the 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 the transparent iris thin film layer 3 is laminated on the thermochromic layer 2 (FIG. 1). A structure laminated on the back surface of the thin film layer 3 (FIG. 2), the support 4 itself forms the thermochromic layer 2 (support formed by blending thermochromic material, thermochromic property of porous support) A constitution (FIG. 3) in which a material is impregnated and fixed, etc.) can be exemplified as a basic mode.

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 is a thermochromic material containing a conventionally known thermochromic dye, for example, liquid crystal, an electron-donating color-developing organic compound, an electron-accepting compound, and a color-reversing agent of the both. A thermochromic material containing three components of an organic compound medium that reversibly induces a reaction, or a thermochromic material exhibiting a thermochromic property in the form of fine particles of a resin solid solution of the component (for example, JP-B-51-35414). , Japanese Patent Publication No. 51-44706, Japanese Patent Publication No. 1-293998, etc.). In the above, the color changes before and after a predetermined temperature (color change point) as a boundary, and only one specific state can exist in the normal temperature region of both states before and after the change. That is, the other state is maintained as long as the heat or cold heat required to develop that state is applied, but when the heat or cold heat is no longer applied, it returns to the state exhibited at room temperature (so-called , It is a type that changes color by showing a small hysteresis width with respect to temperature-color density due to temperature change.

Further, a thermochromic material (that is, a thermochromic material containing a color-memory thermosensitive colorant dye, which exhibits a large hysteresis characteristic and is discolored, as described in JP-A-60-264285 previously proposed by the present applicant (that is, The shape of the curve that plots the change in color density due to temperature change is large when the temperature is raised from the low temperature side of the discoloration temperature range and when it is lowered from the high temperature side of the discoloration temperature range. Type that changes color by following different paths: In the normal temperature range between the low temperature side color change point and the high temperature side color change point, it is possible to memorize and retain the appearance changed at a temperature below the low temperature side color change point or above the high temperature side color change point. ), The thermochromic layer.

The thermochromic dye or the color-memory thermochromic dye described above is usually encapsulated in microcapsules, dispersed in a medium containing a binder, and applied as a coloring material such as ink or paint. A desired thermochromic layer is formed on the body surface. Further, the microcapsules may be internally dispersed in a thermoplastic or thermosetting resin.

The transparent iris thin film layer 3 having a conventionally known structure is effective. Specifically, it is composed of a transparent thin film layer and an uneven transparent thin film layer (a transparent thin film layer includes titanium oxide, silicon oxide, zinc oxide, antimony oxide, zinc sulfide, magnesium fluoride, fluorine). A metal compound thin film layer exemplified by calcium chloride, a copolymer of vinylidene chloride and vinyl chloride, vinyl acetate, vinyl alcohol, etc., or any of polyvinyl chloride, polyvinylidene chloride, and polystyrene, and vinyl chloride and styrene. A thin film layer having fine bubbles due to gas generated by decomposition of thermoplastic resin such as coalescence by various methods such as light and heat, vinyl-based copolymer, fibrin-based copolymer, urethane-based copolymer and Various curing agents that cure, a composition having a curable functional group, a thin film layer composed of an organically substituted silicon-based compound, the above organic material, titanium oxide, and an oxide A thin film layer made of inorganic fine particles such as ruminium and zirconium oxide. A transparent thin film layer having irregularities has a difference in refractive index of 0.05 or more from that of the thin film layer, and a visible light transmittance of about 10%. The above-mentioned 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-61-227098 Gazette], an optical interference pattern film in which a vapor deposition layer made of one or more kinds of oxides, sulfides, and fluorides is provided on one or both sides (JP-A-60-32645), and two or more kinds of polymers. A transparent multi-layered film (US: THE MEARL COR PORION manufactured by THE MEARL COR PORION, which has 100 or more layers made of polymers having different refractive indexes as an intermediate layer, and exhibits an optical interference phenomenon. Name: MEARL IRIDESCENT FILM) and the like.

Although the thermochromic layer 2 can be directly provided on the back surface of the transparent iris thin film layer 3 described above, it 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 in which a protective resin layer and an iris thin film layer are provided on a sheet substrate directly or via a release layer (Japanese Patent Laid-Open No. 61-69499)) is provided on the support 4. Can be used to transfer and bond the transparent iris thin film layer 3. As the support body 4, all objects such as woven cloth 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 not limited to the embodiment of FIGS. 1 to 3, and is wavy (see FIG. 4), uneven (see FIG. 5), partial (see FIG. 6). It is effective to use a transparent film or the like (not shown) formed between the iris thin film layer 3 and the thermochromic layer 2 as well.

[0012]

[Action]

 The color effect due to 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. The appearance of the transparent iris thin film layer 3 varies in various ways depending on the color of the underlayer (the color exhibited by the thermochromic layer 2 and the color of the non-discolored layer which is visible in the decolored state of the thermochromic layer 2). Immediately, when the base is black, the transmitted light is absorbed and the interference light is emphasized, and the glossiness is enhanced. On the other hand, when the base is white, the interference light disappears due to the reflected light from the white surface. When the background is colored, the interference light and the background color interact with each other to make the color more vivid and to see various colors that change depending on the viewing angle. The above-mentioned characteristics, in combination with the color change of the thermochromic layer 2, influence each other to make various appearance changes visible.

Example 1 30 parts of a thermochromic pigment showing a change from black to colorless at 30 ° C. was dispersed in 70 parts of acrylic emulsion and screen-printed on a cotton cloth to produce a thermochromic cotton cloth (at 30 ° C.). (Changed from black to white). Then, an acrylic resin emulsion was applied to MEEARL IRIDESCENT FILM (trade name: IF-8101), which exhibits iris due to the light interference phenomenon, and the thermochromic cotton cloth was bonded to obtain a thermochromic laminated body. The thermochromic laminate had an 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 below. Example 2 The same FILM as in Example 1 and a polyester knitted fabric were joined with a polyurethane adhesive, and the thermochromic ink similar to that of Example 1 was applied from the knitted fabric side. At temperatures above ℃, a knit fabric that was black and had opal luster was obtained.

Example 3 15 parts of a thermochromic pigment showing a change from blue to colorless at 15 ° C. and 0.7 part of a pink fluorescent pigment are dispersed in 50 parts of an epoxy resin, and at 15 ° C. or higher, a pink color, An epoxy ink having a purple color change at 15 ° C or lower was obtained. 20 parts of an amine-based curing agent was mixed with 50 parts of the epoxy ink, and the urethane-based leather was printed by screen printing. A rainbow film (manufactured by Toyo Metallizing Co., Ltd., transfer film, trade name: RB-6001) is attached before curing, and after curing, the transfer film is peeled off, giving a pink color at 15 ° C or higher and a purple color at 15 ° C or lower. And a urethane synthetic leather having a lacquer-like gloss was obtained.

Example 4 The urethane synthetic leather obtained in Example 3 was embossed to make the surface uneven, thereby further improving the glossiness.

Example 5 10 parts of a thermochromic color memory pigment (erasing temperature of 30 ° C., coloring temperature of 15 ° C .: exhibits red color when colored), 50 parts of a 50% acrylic resin / xylene solution, 20 parts of xylene and methyl 20 parts of isobutyl ketone was stirred and mixed, and spray-painted on a white vinyl chloride sheet with a spray gun to provide a thermochromic layer 2 having a thickness of about 40 μm. Then, an acrylic resin emulsion was applied to the MERL IRIDE SENT FILM and bonded to obtain a thermochromic sheet. In the thermochromic sheet, the thermochromic layer 2 is colored red at 15 ° C. or lower, and is maintained in a red colored state at a temperature range of 30 ° C. or lower, and the red color disappears at 30 ° C. or higher to reveal the white color of the base. The appearance is maintained under the environment of 15 ° C to 30 ° C. The discoloration of the thermochromic layer 2 and the iris pattern visually combine to diversify the color change.

[0017]

[Effect of the device]

 As described above, the layered product of the present invention can effectively develop without deteriorating the characteristics of each other by combining the thermochromic material and the iris thin film layer having an iris pattern, and the combined color change woven by both can be achieved. It is possible to provide a novel and decorative thermochromic material that can be visualized, and it can be applied to various fields such as the toy field, decoration field, clothing and textile materials field.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional explanatory view of a first embodiment of the laminated body of the present invention.

FIG. 2 is an enlarged cross-sectional explanatory view of a second embodiment of the laminated body of the present invention.

FIG. 3 is an enlarged cross-sectional explanatory view of a third embodiment of the laminated body of the present invention.

FIG. 4 is an enlarged cross-sectional explanatory view of a fourth embodiment of the laminated body of the present invention.

FIG. 5 is an enlarged cross-sectional explanatory view of a fifth embodiment of the laminated body of the present invention.

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

[Explanation of symbols]

 1 Thermochromic laminate having an iris color pattern 2 Thermochromic layer 3 Transparent iris thin film layer 4 Support

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B32B 27/20 A 6122-4F B44C 3/02 A 9134-3K // B41M 5/26 5/30

Claims (1)

Claims for utility model registration: 1. A thermochromic laminate having an iris pattern, comprising a transparent iris thin film layer laminated on a thermochromic layer.