JP2600619Y2 - Thermochromic cursive - 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 writing object . More specifically, the present invention relates to a thermochromic writing object in which a non-color-changing image that hinders visual recognition of an afterimage at the time of decoloring of a reversible thermochromic image is overprinted.

[0002]

2. Description of the Related Art Heretofore, several proposals have been disclosed for printed matter that shows a color change due to a temperature change (for example,
JP-A-60-56242, JP-A-2-3859, etc.). In this type of thermochromic printed matter, when the support is white or light-colored, the appearance after color development tends to be distinguished by a slight afterimage and residual color at the time of decolorization of the thermochromic image, Written type that will reduce the taste and unexpectedness by half, and show a reversible thermochromic image with a cold pen
It was a problem to use for

[0003]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problem of the conventional thermochromic writing object . That is, when the reversible thermochromic image is in the decolored state, it is difficult to visually observe the afterimage and the residual color, and an image that appears in the color-developing state and a thermochromic writing object that can enjoy the strangeness of the change in color tone and the unexpectedness can be provided. It is assumed that.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a plurality of white or light-colored planar supports having a plurality of colors which are in a decolored state in a normal state and have different color tones produced by a cold pen . Reversible thermal transformation
The color images are arranged side by side with the reversible thermochromic ink, and the non-color-changing image composed of a combination of a large number of fine lines darker than the visual density of the afterimage at the time of decolorization of the reversible thermochromic image is the reversible thermochromic image. A thermochromic writing object that is overprinted is required.

The flat support is effective as long as it is a white or light-colored flat base material having printability. For example, general-purpose papers, cloths, synthetic papers, plastic sheets, metal plates, enamel plates Etc. can be used.

A thermochromic material conventionally known as a reversible thermochromic ink for forming the reversible thermochromic image, for example, an electron-donating color-forming organic compound, an electron-accepting compound, and a color reaction of the two. Using a thermochromic material containing an organic compound medium that causes reversible generation, such as Japanese Patent Publication No. Sho 5
No. 2-7764, "Printing ink", furthermore, the color changes due to a change in temperature with a large hysteresis characteristic of temperature-color density, that is, when the temperature is increased from a temperature lower than the color change temperature range, and conversely, the color change temperature In the case where the temperature is lowered from the higher temperature side than the temperature range, the color changes following a different path, and in the normal temperature range between the low temperature side color change point and the high temperature side color change point, the low temperature side color change point or less or the high temperature side color change point or more. 4-17 that can store and retain the appearance changed at different temperatures
A color material using a color memory thermosensitive dye disclosed in JP-A-154-154 is appropriately used.

In the above, the plurality of reversible thermochromic images having different color tones at the time of color development are arranged side by side, including a close arrangement with no gap, a close arrangement with an appropriate interval, and the like.

The object having the side-by-side reversible thermochromic image is provided.
The cursive writing is effective as a handwritten writing which can be enjoyed by writing with a cold pen in a decolored state, that is, in a normal temperature range, so that multicolored handwriting can be displayed.

The non-color-changed image is an image formed by overprinting at least the portion where the thermochromic image is formed, and is an image composed of a combination of many lines. The honeycomb, turtle pattern, mesh, grid, grid, and other geometrical patterns that are formed are effective, taking into account the shape, size, and overall balance of the thermochromic image, and the color and thickness. , Density and the like are determined as appropriate. The thin line is not only a solid line, a straight line such as a broken line, a curved line, but also a bent line,
Spiral wire and other various designs are effective.

[0010]

[Action] white or when color formed in a planar shape support pale
When a plurality of reversible thermochromic images having different color tones are arranged in a decolored state, a certain amount of afterimage or residual color cannot be covered. Here, the non-color-changed image formed by the combination of the thin lines is an image that is darker than the visual density of the afterimage or the residual color, and is perceived beyond these sights, and camouflages the afterimage or the residual color. Therefore, it is difficult to imagine the thermochromic image appearing due to the temperature change, and it does not impair the unexpectedness and the taste of the change.
On the other hand, even if the thermochromic image is in a color-developed state, the non-color-change image is an image composed of a combination of fine lines, and does not hinder the visual perception of the thermochromic image.

A thermochromic writing object having a multicolored band-like thermochromic image formed by a cold pen causes multicolored handwriting which cannot be imagined in a normal state.

[0012]

【Example】

[0013]

[0014]

[0015]

Example 1 (See FIGS. 1 and 2 ) As a planar support 2, a 50 μm thick white polyester film was coated with an adhesive, and a 2 mm thick polyethylene foam was bonded. Blue ← → colorless, pink ← → colorless, dispersed in an ethylene / vinyl acetate copolymer resin emulsion on the surface of the planar support 2 formed as described above,
Color memory thermochromic ink that changes color from green to colorless and from red to colorless (high-temperature side discoloration point: 35 ° C, low-temperature side discoloration point: 15 ° C) [Use Japanese Patent Publication No. 4-17154]
To form four types of lattice-like images which are in close contact with each other to form a reversible thermochromic image 3. Next, a large number of honeycomb patterns were continuously formed on the upper surface with a light gray non-color-change ink to form a non-color-changed image 4.

When the thermochromic writing object 1 formed as described above is heated to 35 ° C. or higher, the reversible thermochromic image 3 is decolorized.
At first glance, only the light gray non-discolored image 4 was visible.

Next, when the thermochromic writing object 1 in a state where the reversible thermochromic image 3 is erased is cooled from 35 ° C., 1
Up to 5 ° C., the decolored state was maintained, and at first glance, only a light gray non-discolored image 4 was visible.

When the temperature was further cooled to 15 ° C. or less, the lattice-like reversible thermochromic image 3 was colored in blue, pink, green and red, respectively, and the non-color-changing image 4 was visible but inconspicuous.

A state in which the reversible thermochromic image 3 is colored again,
That is, when the temperature is raised from 15 ° C. or lower, the state of color development is maintained up to 35 ° C., and when the temperature is further raised to 35 ° C. or higher, the color is erased and can be used repeatedly.

When the surface of the thermochromic writing object 1 formed as described above is written with a cold pen (writing tip temperature: 15 ° C. or less), the handwriting on the reversible thermochromic image 3 is blue, peach, green, A red handwriting was obtained.

The handwriting could be maintained up to 35 ° C. even when heated.

Heat to 35 ° C. or higher (exothermic temperature is 35 ° C.)
When the above-described applicator is used), the handwriting is erased in color and can be used repeatedly.

Example 2 (See FIG. 3 ) A 50 μm thick white polyester film was used as the planar support 2.
The color tone on the film surface is red, orange, yellow, green, blue,
Indigo / purple color memory thermochromic ink (high-temperature side discoloration point: 35 ° C, low-temperature side discoloration point: 15 ° C)
U.S. Pat. No. 7,154, No. 7].
A seed image is formed to obtain a reversible thermochromic image 3. Then on it
Many fine lines are formed vertically and horizontally with light gray non-discoloring ink on the surface
A grid-shaped non-discolored image 4 was obtained.

[0025] The above as forming the thermochromic the cursive 1 on the surface of cold pen 5: was written in (writing tip temperature 15 ℃ below), was made to appear the handwriting rainbow colors.

[0026]

As described above, since the support of the thermochromic writing object of the present invention is white or light-colored, various thermochromic images can be viewed with good contrast, and afterimages or residual colors at the time of erasing are camouflaged. As a result, it is possible to provide a cursive script that is surprising and rich in change.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of a thermochromic writing object of the present invention in a decolored state.

FIG. 2 is a plan view of the embodiment of FIG. 1 in a color developing state.

[Figure 3] of an embodiment of the present invention thermochromic be cursive, thermochromic
Shows handwriting that appears when writing with a cold pen
You.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Thermochromic writing object 2 Planar support 3 Reversible thermochromic image 4 Non-discoloring image 5 Cold pen

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B41M 5/28-5/34 B42D 15/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A surface of a white or light-colored planar support,
The color at the time of color development that is in a decolored state under normal conditions and is colored by a cold pen
Multiple reversible thermochromic images with different tones are
Are arranged side by side , and when the reversible thermochromic image is decolored,
A thermochromic writing object , wherein a non-color-changing image composed of a combination of a large number of fine lines darker than the visual density of an afterimage is overprinted with the reversible thermochromic image.