JPH08137411A - Color tone changing panel - Google Patents

Abstract

PURPOSE: To provide a panel usable for a signboard, an interior decoration, etc., by making color of a thermosensitive color-changing agent artificially changeable. CONSTITUTION: The thermosensitive color-changing agent 2 which changes in color according to the temperature is provided on a surface side of a planar heating element 1 which is temperature-adjustable. On the surface side of the planar heating element 1 which is temperature-adjustable, characters, pictures, patterns and designs, etc., are drawn by the thermosensitive color-changing agent 2 which changes in color according to the temperature rise. On the surface side of the planar heating element 1 which is temperature-adjustable, characters, pictures, patterns and designs, etc., are drawn by general coating materials which do not change in colors by temperature and thereon the thermosensitive color-changing agent 2 is applied. On the surface side of the planar heating element 1 which is temperature- adjustable, more than two thermosensitive color-changing agents 2 which change in color from colored to colorless according to the temperature rise and are different in discoloring temperature points are laminated to >=2 layers so that discoloring temperature points of these thermosensitive color-changing agents 2 are made gradually descending from lower layer to upper layer. On the surface side of the planar heating element 1 which is temperature- adjustable, general coating materials which do not change in color by temperature are applied and thereon the thermosensitive color-changing agents 2 are laminated to >=2 layers and the discoloring temperature points of the thermosensitive color-changing agents 2 are made gradually descending from lower layer to upper layer.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The color tone change panel of the present invention can be used as a decorative panel, a display panel, etc. in various fields. For example, a decorative panel for construction for decorating the inner and outer wall surfaces of a building, a home appliance. Product exterior panels, automobiles,
It can be used as a motorcycle body panel, advertisement, signboard display panel, etc.

[0002]

2. Description of the Related Art Conventionally, there have been various thermosensitive color-changing materials that change color due to changes in ambient temperature. This thermochromic material is usually
When the temperature exceeds a certain value (discoloration temperature point), it changes from colored to colorless, and when it falls below the same temperature point, it reversibly changes to colored again. This thermochromic material is used as a simple thermometer that is printed on a beverage container (for example, a can of draft beer) to notify you of the drinking water, or is woven into ski wear as a fiber to change the color of the wear at ambient temperature. It was also used for fashionable applications where it discolors.

[0003]

However, since it cannot be used by being applied to an article like ordinary paints, its application is limited at present, and its application to other fields is desired. It was

An object of the present invention is to make it possible to artificially change the color of a thermochromic material so that it can be used in various fields such as signboards and interior decorations.

[0005]

As shown in FIG. 1, a color tone changing panel according to a first aspect of the present invention is provided with a thermosensitive color changing material 2 which changes color depending on temperature on the front side of a temperature-adjustable sheet heating element 1. It is characterized by

In the color tone change panel according to the second aspect of the present invention, characters, pictures, patterns, patterns and the like are drawn on the front side of the temperature-adjustable sheet-like heating element 1 by the thermosensitive color changing material 2 which changes color due to temperature rise. It is characterized by

In the color tone change panel according to claim 3 of the present invention, characters, pictures, patterns, patterns, etc. are drawn on the front side of the temperature-adjustable sheet-like heating element 1 by the general paint 3 whose color does not change with temperature. The thermosensitive color changing material 2 is provided on it.

The color tone change panel according to the fourth aspect of the present invention is characterized in that the thermochromic material 2 changes color from colorless to colorless due to a temperature rise.

According to the fifth aspect of the present invention, in the color tone changing panel, two or more heat-sensitive elements which change color from colored to colorless due to temperature rise on the front side of the temperature-adjustable sheet-like heating element 1 and have different color change temperature points. Two or more layers of the color-changing material 2 are laminated, and the color-changing temperature points of these thermosensitive color-changing materials 2 are gradually lowered from the lower layer to the upper layer.

In the color tone change panel of claim 6 of the present invention, a general coating material 3 that does not change color due to temperature is provided on the front side of the temperature-adjustable sheet heating element 1, and two layers of the thermosensitive color changing material 2 are provided thereon. The above-mentioned laminated layers are characterized in that the color-changing temperature points of these thermosensitive color-changing materials 2 are gradually lowered from the lower layer to the upper layer.

The color tone change panel according to the seventh aspect of the present invention is characterized in that the thermosensitive color change material 2 is provided so as to display characters, pictures, patterns, designs and the like.

In the color tone change panel of claim 8 of the present invention, the heat transfer material 4 is provided on the surface of the sheet heating element 1, and the heat sensitive color change material 2 or the general coating material 3 and the heat sensitive color change material 2 are provided on the front side thereof. It is characterized by being provided.

A color tone changing panel according to a ninth aspect of the present invention is characterized in that a protective sheet 5 is attached onto the outermost thermosensitive color changing material 2.

[0014]

In the color tone changing panel according to the first aspect of the present invention, since the thermosensitive color changing material 2 that changes color depending on the temperature is provided on the front side of the temperature-adjustable sheet heating element 1, the temperature of the sheet heating element 1 is controlled. The color of the panel surface can be changed by changing the color.

In the color tone change panel according to the second aspect of the present invention, characters, pictures, patterns, patterns and the like are drawn on the front side of the temperature-adjustable sheet-like heating element 1 by the thermosensitive color changing material 2 which changes color due to temperature rise. Therefore, the temperature of the sheet heating element 1 can be changed to change the color of characters, pictures, patterns, designs, etc. on the panel surface.

In the color tone change panel according to the third aspect of the present invention, characters, pictures, patterns, patterns and the like are drawn on the front side of the temperature-adjustable sheet heating element 1 by the general paint 3 whose color does not change with temperature. Since the thermochromic material 2 is provided thereon, the temperature of the sheet heating element 1 can be varied to change the color of the panel surface. When this color becomes nearly colorless or colorless, the characters of the general paint 3 , Pictures, patterns, designs, etc. can be displayed.

In the color tone change panel according to claim 4 of the present invention, since the thermosensitive color changing material 2 changes color from colored to colorless due to temperature rise, when the temperature of the sheet heating element 1 is increased, In the panel, the color of the thermosensitive color changing material 2 disappears and the color of the sheet heating element 1 appears, and in the panel of claim 2, characters, pictures, patterns, patterns drawn by the thermosensitive color changing material 2 disappear, and In the panel, the color of the thermochromic material 2 disappears and characters, pictures, patterns, designs, etc. drawn by the general paint 3 are displayed.

In the color tone change panel according to the fifth aspect of the present invention, two or more heat-sensitive sheets which change color from colorless to colorless due to temperature rise on the front side of the temperature-adjustable planar heating element 1 and have different color change temperature points. Two or more layers of the color-changing material 2 are laminated, and the color-changing temperature points of these thermosensitive color-changing materials 2 are gradually lowered from the lower layer to the upper layer. Therefore, when the temperature of the sheet heating element 1 is increased, the layers are laminated. The thermosensitive color changing material 2 disappears in sequence from the upper layer to the lower layer, and the thermosensitive color changing material 2 in the lower layer is sequentially displayed.

In the color tone change panel of claim 6 of the present invention, a general coating material 3 which does not change color due to temperature is provided on the front side of the temperature-adjustable sheet-like heating element 1, and two layers of the thermosensitive color changing material 2 are provided thereon. Since the color-changing temperature points of these thermosensitive color-changing materials 2 are laminated so as to gradually decrease from the lower layer to the upper layer, when the temperature of the sheet heating element 1 is increased, the laminated thermosensitive color-changing material 2 is From the upper layer to the lower layer, they disappear one by one, and the thermochromic material 2 in the lower layer is displayed in sequence.
Finally, the general paint 3 is displayed.

In the color tone change panel according to claim 7 of the present invention, since the thermosensitive color changing material 2 is provided so as to display characters, pictures, patterns, patterns, etc., when the temperature of the sheet heating element 1 is increased, the laminated layers are laminated. The characters, pictures, patterns, designs and the like of the thermosensitive color changing material 2 thus displayed are sequentially displayed.

In the color tone changing panel according to claim 8 of the present invention, the heat transfer material 4 is provided on the surface of the sheet heating element 1, and the heat sensitive color changing material 2 or the general coating material 3 and the heat sensitive color changing material 2 are provided on the front side thereof. Because of the provision, even if there is temperature unevenness in the planar heating element 1, it is eliminated on the surface of the heat transfer material 4, and the entire panel is uniformly discolored.

In the color tone change panel according to claim 9 of the present invention, the thermosensitive color changing material 2 is protected because the protective sheet 5 is attached on the outermost layer of the thermosensitive color changing material 2.

[0023]

[Embodiment 1] FIG. 1 shows a first embodiment of a color tone change panel of the present invention. This panel is a sheet heating element 1.
A self-temperature control heater (PTC heater) is used for the PTC heater 1. The thermosensitive color change material 2 is directly screen-printed on the surface of the PTC heater 1, and a transparent polyester film (protective sheet) 5 is attached on top of it. There is.

When the PTC heater 1 is energized, the entire surface of the PTC heater 1 is uniformly heated, and the temperature is maintained at a predetermined constant value. In this case, the PTC heater 1 uses a heater whose temperature is close to or higher than the color change temperature point of the heat sensitive color changing material 2 (the temperature at which the heat sensitive color changing material changes from colored to colorless due to temperature increase).

Here, the principle of the PTC heater 1 will be briefly described. When the temperature of the PTC heater 1 rises above a specified value, the resin forming the heater 1 softens, the electrical resistance increases, the current decreases, and the temperature is automatically lowered. When the temperature drops below the specified value, thermal contraction of the resin begins, the electrical resistance decreases, the current value rises again, and the temperature automatically rises.
The temperature is maintained at the specified temperature by repeating this temperature decrease and temperature increase.

The PTC heater 1 has the following features. ． ON / O for temperature adjustment to control self temperature
No accessories such as FF switch, thermostat and controller are required. However, ON / OFF control by a temperature sensor or temperature control by a controller can be performed as necessary. ． It is a safe heater without overheating. PTC
Since the maximum temperature of the heater 1 itself is determined in the heater 1, safety can be ensured against accidental accidents such as spontaneous ignition due to overheating, even when the heater 1 continues to be energized due to a failure of the thermostat or controller. . Even in the case of a normal heater, the maximum temperature can be set low by adjusting (designing) the power density (W / cm ² ), but there is a problem that the response of the temperature rise is lowered and the temperature unevenness easily occurs.

[0027] It has flexibility, the heater material and the covering material are thin, and flexible. ． It is an energy-saving type heater, and consumes power as much as the energy of the part that releases heat. Compared with the conventional nichrome wire heater, the power consumption is about 30 to 50% less. ． The temperature can be raised quickly, depending on the product, 3 to 10
A specified temperature (for example, 60 ° C.) is reached within seconds. ． There is no disconnection like Nichrome wire heater,
Maintains stable characteristics and requires almost no maintenance.

By using this PTC heater 1,
It is possible to produce a simple and economical color tone change panel. However, a conventional nichrome wire heater or another heater may be used for the planar heating element 1.

The thermochromic material 2 has two colors.
_A pattern (in this case, a triangle) is drawn by ₁ , 2 _{2 as} shown in FIG. 1 (b). When the heat-sensitive color change materials 2 _1, 2 ₂ are both colored at normal temperature (room temperature), PTC heater 1 is near color change temperature point of the heat-sensitive color change materials 2 _1, 2 _2, or it is heated above, Both of the thermosensitive discoloring materials 2 ₁ and 2 ₂ are colored to be almost colorless or completely colorless. The thermosensitive color changing material 2 may be used for multicolor printing by using three or more colors.
You may draw more complicated patterns, patterns, letters and pictures with.

[0030]

Second Embodiment FIG. 2 shows a second embodiment of the color tone changing panel of the present invention. This panel is P of Example 1.
The general coating material 3 is printed on the surface of the TC heater 1, the thermosensitive color changing material 2 is printed on the general coating material 3, and the transparent polyester film (protective sheet) 5 is attached thereon.

[0031] The general coating 3 is typically paint 3 ₁ of two colors,
3 ₂ using is depicted a pattern (triangle) as shown in FIG. 2 (b). However, this pattern cannot be seen at room temperature due to the thermosensitive color changing material 2 printed on it. Incidentally, the general paint 3 may be used for multicolor printing by using three or more colors, and the general paint 3 may draw more complicated patterns, patterns, characters and pictures.

In this panel, the color of the thermosensitive color changing material 2 is displayed at room temperature before the PTC heater 1 operates, and the PT
When the C heater 1 operates to raise the temperature to near the color change temperature point of the thermochromic material 2 or more, the thermochromic material 2 becomes a colorless or colorless colorless transparent, and accordingly the general paint 3
Is displayed and the design is displayed.

[0033]

[Embodiment 3] FIG. 3 shows a third embodiment of the color tone change panel of the present invention. This panel is the PT of Example 1.
The general coating material 3 is printed on the surface of the C heater 1, the thermosensitive color changing material 2 is laminated on the general coating material 3 in two layers and printed, and the transparent polyester film (protective sheet) is formed thereon.
5 is pasted and produced.

The general paint 3 has a desired pattern drawn by multicolor printing. However, this pattern cannot be seen at room temperature due to the thermosensitive color changing material 2 printed on it.

The thermosensitive color-changing material 2 is an upper layer thermosensitive color-changing material 2.
Yes discoloration temperature point T ₁ of the ₁ is set lower than the discoloration temperature point T ₂ of the lower layer of the heat-sensitive color change materials 2 _2, i.e., T ₁ <Yes as the T _2, the upper layer of the temperature rise of the PTC heater 1 thermal discoloration material 2 ₁ discolored from colored earlier to colorless, then the thermosensitive color change material 2 ₂ of the lower layer is are to be discolored to colorless from colored. By doing so, the laminated thermosensitive color changing materials 2 ₁ , 2 ₂ can be displayed in order.

However, the PTC heater 1 is maintained at a constant temperature for a while after it is operated, and the temperature cannot be freely changed like a nichrome wire heater. Therefore, the laminated thermosensitive color changing materials 2 ₁ and 2 ₂ are used. It is not suitable for freely switching and displaying.

When it is desired to switch and display the thermosensitive color changing material 2 laminated by using such a PTC heater 1, the first PTC heater capable of raising the temperature to the color changing temperature point T ₁ of the upper thermosensitive color changing material 2 _1. And the color change temperature point T of the lower thermosensitive color change material 2 _2.
It is advisable to prepare two second PTC heaters capable of raising the temperature to ₂ (T ₁ <T ₂ ), and to bond them, for example, to use them as one heater. By doing this, the first PT
It is possible to operate the C heater to make only the first thermosensitive color changing material 2 ₁ colorless and display the _second thermosensitive color changing material 2 ₂ under the first thermosensitive color changing material 2 ₁ and operate the second PTC heater. The thermochromic materials 2 ₁ and 2 ₂ of ₂ can be made colorless to display the general coating material 3 as the underlying layer.

[0038]

Fourth Embodiment FIG. 4 shows a fourth embodiment of the color tone change panel of the present invention. In this panel, the PTC heater 1 of Example 1 is attached to the back surface of an aluminum plate (heat transfer material) 4, the general paint 3 is printed on the surface of the aluminum plate 4, and the heat-sensitive color change material 2 is applied on the general paint 3. Is laminated in two layers for printing, and a transparent polyester film (protective sheet) 5 is stuck on it for production.

Similar to the third embodiment, the general coating material 3 has a desired pattern drawn by multicolor printing. However, this pattern cannot be seen at room temperature due to the thermosensitive color changing material 2 printed on it.

[0040] The similarly to thermal discoloration material 2 also Example 3 and have set discolored temperature point T ₁ of the upper layer of the heat-sensitive color change material 2 ₁ is lower than the discoloration temperature point T ₂ of the lower layer of the heat-sensitive color change materials 2 _2, That is, T
₁ <T _2, and as the temperature of the PTC heater 1 rises, the thermosensitive color changing material 2 _{1 in the} upper layer _first changes color from colorless to colorless, and then the thermosensitive color changing material 2 ₂ in the lower layer changes from colored to colorless. It is supposed to change color. By doing so, the laminated thermosensitive color changing materials 2 ₁ , 2 ₂ can be displayed in order.

In the case of this panel, the aluminum plate 4 serves as a support material for the panel and can be used as a panel as it is. Further, although the PTC heater 1 is less likely to cause uneven temperature, the thermochromic material 2 is passed through the aluminum plate 4.
By heating the heater 1, even a slight temperature unevenness of the heater 1 can be eliminated, and the color irregularity at the time of discoloration can be almost completely eliminated.

In making a color tone change panel similar to that of Example 4, the thermosensitive color change material 2 was printed in multiple layers on the back surface of the transparent polyester film 5, and the general coating material 3 was printed under it to form a colored film. First, the colored film 12 may be produced, and the colored film 12 may be attached to the surface of the aluminum plate 4 with the double-sided tape 10. The PTC of Example 1 is attached to the back surface of the aluminum plate 4 by using the double-sided tape 13.
The heater 1 may be attached to produce a color tone change panel.

In the above-described Examples 3 and 4, the thermochromic material 2 was laminated in two layers, but it may be laminated in three or more layers. However, the color-changing temperature points of the thermosensitive color-changing material 2 to be laminated are set so as to increase from the upper layer (front side) to the lower layer.

In this case, the thermosensitive color-changing material 2 may be used to draw characters, patterns, or patterns on each layer of the thermosensitive color-changing material 2.

[0045]

[Example of use] Color tone change panel 20 described in Examples 1 to 4
As shown in FIG. 6, it can be used by attaching it to a wall of a room as a decorative panel. In this case, the PTC heater 1 of the color tone change panel 20 is turned on by a switch not shown.
By turning off / on, the color of the panel 20 is changed and the room can be redesigned.

In this case, if the color tone changing panel 20 is made so that a color suitable for summer (a color such as blue or green) appears at room temperature and a color suitable for winter (red or yellow) due to heat generated by the heater 1,
By operating the heater 1 in winter, the entire room can be efficiently heated by the uniform heat dissipation from the panel 20, and the room can be visually made warm.

The color tone changing panel 20 may be attached to a vehicle body and used as shown in FIG. In this case, it is possible to form the entire body with the panel 20, but it is also possible to cut the panel 20 into a band shape and attach it to the body as a line. Also in this case, the heater 1 is switched by a switch (not shown).
If you change the temperature of, you can change the color of the line, you can easily change the image of the car.

Further, the color tone changing panel 20 can be used as a display device for a signboard as shown in FIG. In this case, the thermochromic material 2 and the general paint 3 of the panel 20
It is advisable to form letters, patterns, and patterns with. Also in this case, if the temperature of the heater 1 is changed by a switch (not shown), the characters, patterns, and patterns displayed on the signboard can be easily changed.

[0049]

The color tone change panel of the present invention has the following effects. ． Since it has a simple structure, is durable, and is inexpensive, it can be used in various fields. ． If you use it as a decorative panel on the inside and outside walls of a building, you can easily change the image of the building. ． If you use it as a body panel for cars and motorcycles, you can easily change the image. ． If it is used for signboards, etc., it is convenient because it can switch and display messages and change the color tone.

[Brief description of drawings]

1A is a cross-sectional view showing a first embodiment of a color tone change panel of the present invention, and FIG. 1B is a plan view of the same color tone change panel.

2A is a sectional view showing a second embodiment of the color tone change panel of the present invention, and FIG. 2B is a plan view of the same color tone change panel.

FIG. 3 is a sectional view showing a third embodiment of the color tone change panel of the present invention.

FIG. 4 is a sectional view showing a fourth embodiment of the color tone change panel of the present invention.

FIG. 5 is a sectional view showing a fifth embodiment of the color tone change panel of the present invention.

FIG. 6 is an explanatory diagram showing an example of using the color tone change panel of the present invention in a building.

FIG. 7 is an explanatory diagram showing an example of using the color tone change panel of the present invention in an automobile.

FIG. 8 is an explanatory diagram showing an example in which the color tone change panel of the present invention is used for a signboard.

[Explanation of symbols]

 1 Sheet heating element 2 Thermochromic material 3 General paint 4 Heat transfer material 5 Protective sheet

Claims (9)

[Claims] 1. A color tone change panel comprising a thermosensitive color changing material (2) which changes color depending on temperature on the front side of a temperature-adjustable sheet-like heating element (1). 2. A character, a picture, a pattern, a design, etc. are drawn on the front side of a temperature-adjustable sheet-like heating element (1) by a thermosensitive color-changing material (2) which changes color when the temperature rises. Color change panel. 3. A character, a picture, a pattern, a design, etc. are drawn on a front side of a temperature-adjustable sheet-like heating element (1) by a general paint (3) whose color does not change due to temperature, and a thermosensitive color-changing material thereon. (2) is provided, The color tone change panel characterized by the above-mentioned. 4. A color tone change panel characterized in that the thermosensitive color change material (2) according to claim 1, 2 or 3 changes color from colored to colorless due to a temperature rise. 5. A thermosensitive color changing material (2) having two or more layers on the front side of a temperature-adjustable sheet-like heating element (1), which changes color from colored to colorless due to temperature rise and has different color change temperature points. A color tone change panel characterized in that the color change temperature points of these thermosensitive color change materials (2) are laminated so as to become gradually lower from the lower layer to the upper layer. 6. A general coating material (3), which does not change color with temperature, is provided on the front side of the temperature-adjustable sheet heating element (1),
Two or more layers of the thermosensitive color changing material (2) are laminated thereon, and the color change temperature points of the thermosensitive color changing material (2) are gradually lowered from the lower layer to the upper layer. Change panel. 7. A color tone change panel, characterized in that the thermosensitive color changing material (2) according to claim 5 or 6 is provided so as to display characters, pictures, patterns, designs and the like. 8. A heat transfer material (4) is provided on the surface of each sheet heating element (1) according to any one of claims 1 to 7, and a thermosensitive color change material (2) or a general coating material (3) is provided on the front side thereof. ) And a thermosensitive color changing material (2) are provided. 9. A color tone change panel characterized by comprising a protective sheet (5) attached on the outermost thermosensitive color changing material (2) according to any one of claims 1 to 8.