JP2011167995A - Base material for calling card and calling card using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base material for a calling card and calling card using the same high in ornamenting effect and visual effect superior when handing, excellent in impactness, and suitable for differentiating from other men. <P>SOLUTION: The base material 1 for the calling card in which character information is formed is constituted by arranging a reversible thermal color changing layer 3 in at least a part of the base material 2. A non-thermal color changing layer 4 is formed along with the reversible thermal color changing layer 3. The color of the reversible thermal color changing layer 3 changes by a body temperature. The calling card 6 is constituted by forming the character information 5 in any of the base material 1 for the calling card. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a business card substrate and a business card using the same. Specifically, the present invention relates to a business card base material having a high visual effect using a color change or image change due to a temperature change and a business card using the same.

Conventionally, since business information is printed with black ink using character information such as a company name and name, it has been difficult to differentiate from others. In recent years, the price of color printing has been reduced due to the improvement of printing technology, so in addition to the black text information, business logos and products, as well as business cards with color printing of business card distributor's face photo, etc. are used. Yes.
However, as the colorization progresses, business cards that have been subjected to the color printing described above are becoming more common, and even these business cards are difficult to differentiate from others.

In addition to this, a technique for identifying identification symbols such as letters and numbers by heating or over time has been disclosed for the purpose of facilitating the organization of information on owned business cards and preventing abuse of distributed business cards. (For example, see Patent Documents 1 and 2).
In the business card of Patent Document 1, when character information is converted into electronic data by an OCR (optical reader), an identification symbol such as a character or a number indicating what each item (name, company name, etc.) represents By heating as described above, a visually recognizable color is exhibited. Therefore, it is not related to the decoration effect of business cards, and it is difficult to visually differentiate from others.
Moreover, in the business card of patent document 2, by applying the character using the scientific change material, when passing it to the other party, there is no difference from an ordinary business card, and the character by the scientific change material appears with the passage of time. Is. Therefore, it is not related to the decorative effect of the business card and cannot be visually recognized at the time of delivery, so it is difficult to visually differentiate from others.

Japanese Utility Model Publication No. 62-35871 Japanese Utility Model Publication No. 3-121875

  INDUSTRIAL APPLICABILITY The present invention has a high decorative effect and visual effect compared to conventional products, has excellent impact at the time of delivery, and is suitable for differentiation from others and a business card using the same. Is to provide.

The present invention requires a business card substrate on which character information is formed, and is provided with a reversible thermochromic layer at least partially.
Further, the reversible thermochromic layer is in an image form, a non-thermochromic layer is formed together with the reversible thermochromic layer, the reversible thermochromic layer changes color depending on body temperature, The color change temperature is 25 ° C. or more and 40 ° C. or less, and the color change temperature of the reversible thermochromic layer is 41 ° C. or more and 80 ° C. or less. The business card substrate is cut into a plurality of business card sizes. It is a requirement that a reversible thermochromic layer is formed on the business card substrate of each business card size after cutting.
Furthermore, it is a requirement that a reversible water discoloration layer and / or a reversible light discoloration layer is provided.
Furthermore, it is required that a business card on which character information is formed on any one of the business card base materials, and the character information is printed with reversible thermochromic ink, and the business card is reversible in the vicinity of the outer edge of the base material. It is a requirement that a thermochromic layer be formed.

Since the present invention can express a color change and image change by providing a reversible thermochromic layer, it has a decorative effect and a visual effect higher than those of conventional products, and a business card substrate excellent in impact at the time of delivery and its use. You can form a business card. As a result, it can be differentiated from others and is less likely to be discarded after distribution, so it works more usefully as a communication tool between business and students.
Further, by using the reversible thermochromic layer to cause an image change that is linked to a user's business or a product for sale, the business property becomes higher.

It is a graph explaining the hysteresis characteristic in the color density-temperature curve of the reversible thermochromic composition used for this invention. It is a longitudinal cross-sectional explanatory drawing of one Example of the business card using the base material for business cards of this invention. It is explanatory drawing showing the change before and after change of the business card of FIG.

The business card substrate of the present invention is provided with a reversible thermochromic layer on at least a part of the front and back surfaces.
As the material for the business card substrate, paper that can easily form character information by printing is preferably used. The name or the name can be printed on a dedicated business card printer, an office printer, a household inkjet printer, or a toner printer. Desired character information such as a company name is formed to become a business card. In addition, as the material of the base material, a resin sheet, a fabric, wood, a metal thin plate, or the like can be applied. In this case, it is preferable to form a coat layer or the like on the print surface to improve print fixability.

  Examples of the business card base material include a large-sized one having a size of A4, A3, B5, B4 and the like, in addition to being formed in a single size. The large-sized one is cut into a business card size before and after printing according to a printing machine owned by the user, and a reversible thermochromic layer is formed on each of the cut business card substrates.

The reversible thermochromic layer can be formed by printing ink containing a reversible thermochromic material, and can exhibit color change and image change. However, an image form is preferable.
Examples of the reversible thermochromic image include patterns, patterns, symbols, letters, numbers, and combinations thereof. Examples of the letters include hiragana, katakana, kanji, alphabets, Greek letters, and the like. , Roman numerals, etc. can be exemplified and variously selected. In addition, although the said character and a number comprise the part (namely, decoration location) other than the character information which is the principal part of a business card, it can also be made into a part of character information in consideration of position alignment etc. It is.
In addition, a non-color-changing layer made of a non-color-changing ink may be formed in the form of a solid or a pattern in the lower layer or upper layer of the reversible thermochromic layer, or in the vicinity thereof, thereby further enhancing the decoration effect.

The color-changing material constituting the reversible thermochromic layer can be applied to either reversible thermochromic property or irreversible thermochromic property, but a material having reversible thermochromic property that can be used repeatedly is suitable. .
As the reversible thermochromic material, in particular, (a) an electron-donating color-forming organic compound, (b) an electron-accepting compound, and (c) an essential reaction medium that determines the temperature at which the color reaction of the two occurs. A microcapsule pigment in which a reversible thermochromic composition that is decolored by heating containing at least three components is encapsulated in a microcapsule is effective.
As the reversible thermochromic composition, a general-purpose material can be used as appropriate, and specifically, Japanese Patent Publication No. 51-35414, Japanese Patent Publication No. 51-44706, and Japanese Patent Application Laid-Open No. 7-186540. Mention may be made of the reversible thermochromic compositions described.
Further, as described in Japanese Patent Publication No. 1-29398 proposed by the present applicant, a highly sensitive reversible thermochromic composition having a hysteresis width of 3 ° C. or less with respect to a color density-temperature curve due to temperature change is mentioned. It is done.
Furthermore, a temperature-sensitive color-changing color memory composition described in Japanese Examined Patent Publication No. 4-17154 proposed by the present applicant and which changes color while exhibiting a large hysteresis characteristic is also effective.
Further, as a thermochromic composition, a specific color having a linear or side chain alkyl group having 3 to 18 carbon atoms as an electron accepting compound proposed by the present applicant, which develops color by heating from a decolored state. Examples include a system to which an alkoxyphenol compound is applied (Japanese Patent Laid-Open Nos. 11-129623 and 11-5973), or a system to which a specific hydroxybenzoic acid ester is applied (Japanese Patent Laid-Open No. 2001-105732). . Furthermore, a system to which a gallic acid ester or the like is applied (Japanese Patent Laid-Open No. 2003-253149) can be applied.

The hysteresis characteristic in the color density-temperature curve of the microcapsule pigment encapsulating the reversible thermochromic composition (heat decoloring type) will be described with reference to the graph of FIG.
In FIG. 1, the vertical axis represents color density and the horizontal axis represents temperature. The change in color density due to the temperature change proceeds along the arrow. Here, A is a point indicating a density at a temperature t ₄ (hereinafter referred to as a complete decoloring temperature) that reaches a completely decolored state, and B is a temperature t ₃ (hereinafter referred to as a decoloring start temperature). C is a point indicating a density at a temperature t ₂ at which color development starts (hereinafter referred to as a color development start temperature), and D is a temperature t ₁ at which a complete color development state is reached (hereinafter referred to as a complete color development state). This is a point indicating a density at a color development temperature).
Discoloration temperature region is a temperature region between the t ₁ and t _4, both phases of the colored state and the decolored state can coexist depending on heating or cooling, t ₂ and t ₃ is a region having a large difference in color density The temperature range between is the substantial discoloration temperature range (two-phase holding temperature range).
Further, the length of the line segment EF is a scale indicating the discoloration contrast, and the length of the line segment HG passing through the midpoint of the line segment EF [ie, t _G −t _H : t _G = (t ₃ + t ₄ ) / 2, t _H = (t ₁ + t ₂ ) / 2] is a temperature width indicating the degree of hysteresis (hereinafter referred to as hysteresis width ΔH), and if this ΔH value is small, in the normal temperature range of both states before and after the color change, Only one particular state can exist. Further, when the ΔH value is large, it is easy to maintain each state before and after the color change.

  The reversible thermochromic layer is preferably discolored by body temperature. In this case, since the color can be easily changed by touching the thermochromic layer portion at the time of delivery of the business card, a strong impact can be given to the partner to whom the business card is delivered. The specific color change temperature is set to 25 ° C. or more and 40 ° C. or less, preferably 28 ° C. or more and 38 ° C. or less.

It is also possible to create a business card of the type that changes its color using frictional heat using a finger or a friction body or a heat source. In this case, the discoloration temperature of the reversible thermochromic layer is set to 41 ° C. or more and 80 ° C. or less, preferably 45 ° C. or more and 70 ° C. or less, and can be configured to hardly change color at room temperature.
In the said structure, it becomes useful when selling the tool which produces friction heat, and the tool used as a heat source.

  The reversible thermochromic layer is prepared by preparing a reversible thermochromic ink, and can be formed on a supporting substrate such as paper by printing means such as screen printing, offset printing, gravure printing, coater, tampo printing, transfer, etc. It can also be formed by sticking a label having a discoloration layer on a substrate.

  The non-color-changing layer using the non-color-changing ink can be easily formed by using a general-purpose dye, pigment, glitter pigment or the like in the form of ink or paint. Examples of the glitter pigment include a metallic luster pigment obtained by coating a surface of natural mica, synthetic mica, glass piece, alumina, etc. with a metal oxide such as titanium, zirconium, chromium, vanadium, iron, or a cholesteric liquid crystal type glitter. Pigments and the like are used.

Furthermore, the business card substrate can be provided with a reversible light color change layer or a reversible water color change layer. In this case, it becomes useful by giving and receiving outdoors and giving and receiving in places where liquids exist such as restaurants. In this case as well, a non-color-changing layer can be provided on the upper layer or the lower layer of each color-changing layer.
The reversible photochromic layer includes a photochromic compound that reversibly discolors when irradiated with ultraviolet rays, and a general-purpose photochromic compound can be applied.
Examples of the photochromic compound include spiropyran compounds, fulgide compounds, dihydropyrene compounds, indigo compounds, aziridines, polycyclic aromatic compounds, azobenzene compounds, salicylidene aniline compounds, xanthene compounds, spirooxazine compounds. Examples thereof include compounds, diarylethene compounds, naphthopyran compounds, and naphthoxazine compounds. The photochromic compound can be used by being encapsulated in a microcapsule.

As the reversible water discoloration layer, a porous layer in which a low refractive index pigment is fixed to a binder resin in a dispersed state and is opaque in a non-water absorption state and transparent in a water absorption state is preferably used.
As the low refractive index pigment, one or more of particulate silica, barite powder, precipitated barium sulfate, barium carbonate, precipitated calcium carbonate, gypsum, clay, talc, alumina white, basic magnesium carbonate, etc. are used in combination. These pigments have a refractive index in the range of 1.4 to 1.7, and exhibit good transparency when water is absorbed. The particle size of the low refractive index pigment is not particularly limited, but 0.03 to 10.0 μm is preferably used. Of the low refractive index pigments, particulate silica is preferably used.
The low refractive index pigment is dispersed in a vehicle containing a binder resin as a binder to form a dispersed ink, and a porous layer (reversible water discoloration layer) is formed on the surface of the resin layer by means such as printing, coating, or spraying. .

  Examples of the binder resin include urethane resin, nylon resin, vinyl acetate resin, acrylic ester resin, acrylic ester copolymer resin, acrylic polyol resin, vinyl chloride-vinyl acetate copolymer resin, maleic resin, polyester resin, styrene. Resin, styrene copolymer resin, polyethylene resin, polycarbonate resin, epoxy resin, styrene-butadiene copolymer resin, acrylonitrile-butadiene copolymer resin, methyl methacrylate-butadiene copolymer resin, butadiene resin, chloroprene resin, melamine resin, and the above Each resin emulsion, casein, starch, cellulose derivative, polyvinyl alcohol, urea resin, phenol resin and the like can be mentioned.

Furthermore, a water-repellent resin layer can be used in combination with the porous layer. The water-repellent resin layer is obtained by adhering a water-repellent treatment liquid containing a water-repellent resin so as to form an image of an appropriate shape on the porous layer, and osmotically drying. Since the water-repellent resin layer is disposed in the coexisting state, the porous layer at the coexisting portion of the water-repellent resin layer does not form a water-absorbing state due to the water-repellent effect, and maintains an opaque state. Therefore, in the normal state (non-water-absorbing state), the water-repellent resin layer and the porous layer that are difficult to discriminate can be discriminated by absorbing water into the porous layer in the portion where the water-repellent resin layer is not provided.
The water-repellent resin is selected from water-repellent resins such as silicone, paraffin, polyethylene, alkylethylene urea, and fluorine.
Further, when forming the porous layer or the water-repellent resin layer, general-purpose dyes, pigments, glitter pigments and the like can be added.

  Examples are shown below, but the present invention is not limited to these examples. In addition, the part in an Example is a mass part.

Example 1 (see FIGS. 2 and 3)
Preparation of business card base material White high-quality paper of business card size is used as the base material 2, and a substantially rectangular pattern in which fingerprints (extracted patterns) are formed in the vicinity of the four corners. The non-discoloring layer 4 was formed by screen printing using ink.
Furthermore, 6 parts of 6- (N-ethylisoamylamino) benzo [α] fluorane as component (a), 3 parts of 2,2-bis (4′-hydroxyphenyl) hexafluoropropane as component (b), 1,1 -Microcapsule pigment (T ₁ : encapsulating a reversible thermochromic composition comprising 3 parts of bis (4'-hydroxyphenyl) -n-decane, 45 parts of stearyl caprate and 5 parts of stearyl laurate as component (c) 27 ° C., T ₂ : 30 ° C., T ₃ : 30 ° C., T ₄ : 33 ° C., ΔH: 3.0 ° C., which changes color from red to colorless). A reversible thermochromic layer 3 was formed by performing rectangular solid screen printing so as to conceal the entire color-changing layer 4, and a business card substrate 1 was obtained.
In the obtained business card substrate 1, red strip decoration (reversible thermochromic layer 3) is visually recognized at both upper and lower edges at room temperature (before change), but the decoration part is heated to 33 ° C. or more at body temperature. When heated (after change), the reversible thermochromic layer 3 changes its color from red to colorless, and the lower non-color-changing layer 4 becomes visible, so that a fingerprint appears in the vicinity of the four corners. Moreover, since the reversible thermochromic layer 3 is colored red when left at room temperature, the decoration part returns to the original red strip decoration. In addition, the above-mentioned aspect change could be repeatedly expressed.

Production of Business Card A vertical business card 6 was obtained by printing character information 5 such as a company name, name, and address on the business card base 1 using a general-purpose business card printer.
The obtained business card 6 has a red belt-like decoration (reversible thermochromic layer 3) visible at both upper and lower edges of the character information 5 at room temperature. When the body temperature was raised to 33 ° C. or higher, the reversible thermochromic layer 3 changed its color from red to colorless, and fingerprints appeared near the corners on both sides. Furthermore, when the other party receives it, the lower decorating part is gripped and heated by the body temperature to 33 ° C. or more, and the reversible thermochromic layer 3 changes its color from red to colorless, and fingerprints appear near the corners on both sides. I put it out.
In this state, when the room temperature state was maintained by leaving it on a desk or the like, the reversible thermochromic layer 3 colored red, so that the decoration part returned to the original red strip decoration.
For this reason, the business card has a two-stage change between the image change when handed over to the other party and the image change when received by the other party, and has a high visual effect and topicality.

Example 2
Production of Business Card Base Material A4 size white fine paper is used as the base material 2, and the center part (character information forming part) is oval-shaped at the position obtained by cutting 10 business card size rectangular base materials. A plurality of reversible thermochromic layers 3 composed of a rectangular background and a leopard pattern (that is, 10 prints of the same pattern) were formed to obtain a business card substrate 1.
In addition, the leopard pattern has a beige background, a pattern in which the outer periphery of the reddish brown part is covered with dark brown, and a pattern with only dark brown is formed in multiple sizes. The beige color part is changed from beige to colorless by heating. A microcapsule pigment (T ₁ : 27 ° C., T ₂ : 30 ° C., T ₃ : 30 ° C., T ₄ : 33 ° C., ΔH: 3.0 ° C.) encapsulating a reversible thermochromic composition that changes color Reversible thermochromic ink A, red-brown part is a microcapsule pigment (T ₁ : 27 ° C., T ₂ : 30 ° C., T ₃₎ encapsulating a reversible thermochromic composition that changes color from reddish brown to light green by heating. : 30 ° C., T ₄ : 33 ° C., ΔH: 3.0 ° C.), the dark brown part encapsulated a reversible thermochromic composition that changes color from dark brown to blue by heating. microcapsule pigment _{(T 1: 27 ℃, T} 2: 30 ℃, _{3: 30 ℃, T 4:} 33 ℃, ΔH: a reversible thermochromic ink C containing 3.0 ° C.) is formed by screen printing.
In the obtained business card substrate 1, a tea-based leopard pattern (reversible thermochromic layer 3) is visually recognized in a horizontally-long rectangular oval pattern at room temperature, but the decorative part is heated to 33 ° C. or higher at body temperature. When heated, the reversible thermochromic layer 3 changes its color from beige to colorless, from red brown to light green, and from dark brown to blue. A change in appearance was observed in the blue leopard pattern. Further, when left at room temperature, the reversible thermochromic layer 3 changes its color from colorless to beige, from light green to reddish brown, and from blue to dark brown, so that the decorative part returns to the original brownish leopard pattern. In addition, the above-mentioned aspect change could be repeatedly expressed.

Production of Business Cards After the business card substrate 1 is cut into 10 business card sizes in accordance with each reversible thermochromic layer 3, character information 5 such as a store name, name, and telephone number is stored using a general-purpose business card printing machine. A horizontal business card 6 was obtained by printing on the oval punched portion.
The obtained business card 6 has a brown leopard pattern (reversible thermochromic layer 3) visible on the outer periphery of the character information 5 at room temperature. The reversible thermochromic layer 3 was heated from 0 ° C. to above, and changed its color from beige to colorless, reddish brown to light green, dark brown to blue and changed to a blue leopard pattern. Furthermore, when the other party received, the lower end portion was grasped and heated to 33 ° C. or higher by the body temperature, and the reversible thermochromic layer 3 changed its color to a blue-colored leopard. Furthermore, when the other party warmed up the entire business card with the palm, the entire leopard pattern of the decorated part changed from brown to blue.
If the room temperature state is maintained by leaving it on a desk or the like in this state, the reversible thermochromic layer 3 changes from colorless to beige, from light green to reddish brown, and from blue to dark brown. Returned to brown leopard pattern.
Therefore, it became a business card in which a change in appearance due to a plurality of color tone changes was obtained, and the visual effect and topicality were high.

Example 3
Preparation of Business Card Base Material A4 size white fine paper is used as the base material 2, and 10 business card size horizontally long rectangular base materials are obtained by cutting, and the lower side is a character information 5 forming part. Microcapsule pigment (T ₁ : 27 ° C., T ₂ : 30 ° C., T ₃ : 30 ° C., T ₄ : 33 ° C., ΔH: 3 encapsulating a reversible thermochromic composition that changes color from black to red by heating. Using a reversible thermochromic ink containing 0.0 ° C), a reversible thermochromic layer is formed by screen-printing the message text “YOU CAN ALWAYS CALL ME !!”, in which a plurality of quadrangular characters are formed in three upper and lower stages. 3 was formed.
Next, using a black non-color-changing ink toned to the same color as the black color of the microcapsule pigment, a horizontally long rectangular background is formed together with the characters, and the same size as a plurality of squares forming the characters. After printing a rectangular background with an image and drying it (the square images are in contact with each other in a non-contact state with a slight gap between them), then fill each gap with dark non-color-changing black ink The screen image is printed so as to cover the edge of the square image, thereby forming a grid-like image separating each square image, and an image of the black electronic bulletin board by the two types of non-color-changing layers 4 and the reversible thermochromic layer 3 is formed. A business card substrate 1 was obtained.
In the obtained business card substrate 1, an image of a horizontally-long rectangular black electronic bulletin board is visually recognized at room temperature, but the reversible thermochromic layer 3 changes from black to red when the decorative part is heated to 33 ° C. or higher at body temperature. The color changed to "YOU CAN ALWAYS CALL ME !!!!" Moreover, since the reversible thermochromic layer 3 changes its color from red to black when left at room temperature, the decorative part returns to the original black electronic bulletin board. In addition, the above-mentioned aspect change could be repeatedly expressed.

Production of Business Cards After the business card substrate 1 is cut into 10 business card sizes according to each reversible thermochromic layer 3, character information 5 such as company name, name, address, etc. is added using a general-purpose business card printer. A horizontal business card 6 was obtained by printing under the decorative part (reversible thermochromic layer 3).
In the obtained business card 6, a black electronic bulletin board is visually recognized above the character information 5 at room temperature. When the black electronic bulletin board is heated with a palm, red characters in three stages, upper and lower, appear.
In this state, when the room temperature state was maintained by leaving it on a desk or the like, the reversible thermochromic layer 3 changed from red to black, so that the decorative portion returned to the original black electronic bulletin board.
Therefore, it became a business card that can be communicated to the other party with communication about a desired message that cannot be visually recognized in a normal state, and has a high visual effect and salesability.

Example 4
Preparation of business card base material A non-color-change image is formed by screen-printing a photographic image of a blue ballpoint pen using a non-color-changing ink with a white card paper of business card size as the base material 2 and the upper part as the character information 5 forming part. did.
Next, a microcapsule pigment (T ₁ : −20 ° C., T ₂ : −9 ° C., T ₃ : 40 ° C., T ₄ : 57 ° C.) encapsulating a reversible thermochromic composition that changes color from blue to colorless upon heating. , ΔH: 63 ° C.), a reversible thermochromic image was formed by screen-printing “FRIXION” handwritten characters at a position in contact with the ballpoint pen tip.
In addition, the back surface of the substrate 2 is a micro that encloses a reversible thermochromic composition that changes color from black to colorless after screen printing of “PILOT” (registered trademark) characters and logo with a blue non-color-changing ink. Using black reversible thermochromic ink containing capsule pigments (T ₁ : 27 ° C., T ₂ : 30 ° C., T ₃ : 30 ° C., T ₄ : 33 ° C., ΔH: 3.0 ° C.) The reversible thermochromic layer 3 was formed by screen printing so as to cover the film, and a business card substrate 1 was obtained.
On the back side of the obtained business card substrate 1, black “PILOT” characters and logo (reversible thermochromic layer 3) are visually recognized at room temperature, but when the decorative part is heated to 33 ° C. or higher at body temperature. The reversible thermochromic layer 3 changed its color from black to colorless, and blue letters and logos appeared. Further, when left at room temperature, the reversible thermochromic layer 3 changes color from colorless to black, so that the decorative portion returns to the original black. In addition, the above-mentioned aspect change could be repeatedly expressed.
Further, the surface of the business card substrate 1 maintains a state in which blue handwritten characters are visible at room temperature, and when heated to 57 ° C. or higher by frictional heat or the like, the reversible thermochromic image changes from blue to colorless. It changed and it was visually recognized as if the characters were erased. Further, when left at −20 ° C. or lower in a freezer or the like, the reversible thermochromic image changes color from colorless to blue, so that the handwritten characters are restored. In addition, the above-mentioned aspect change could be repeatedly expressed.

Production of Business Card A horizontal business card 6 was obtained by printing character information 5 such as a company name, name, and address on the business card base 1 using a general-purpose business card printer.
On the back side of the obtained business card 6, black “PILOT” characters and a logo (reversible thermochromic layer 3) are visually recognized at room temperature. By heating the decoration portion with palms, The logo appeared.
When the room temperature state was maintained by leaving it on a desk or the like in this state, the reversible thermochromic layer 3 changed from colorless to black, so that the characters and logo returned to the original black color.
In addition, when a writing instrument “friction series” that can erase the handwriting by heating with a friction body is used as a commercial product, the blue handwritten character “FRIXION” formed on the surface of the business card 6 is displayed on the rear end of the shaft cylinder. The handwriting is erased by rubbing with a friction body. The erased handwriting could easily explain how to use the business product, including restoring it after leaving it in a freezer.
Therefore, it became a business card that can convey a desired image or phenomenon that cannot be visually recognized to the other party through communication, has a high visual effect, and has excellent topicality and salesability.

Example 5
Preparation of business card base material After printing the entire surface of the business card base material 2 prepared in Example 2 with a water-resistant non-discolored blue ink in a solid form, a wet process silicic acid, urethane emulsion, water, silicone-based antifoaming agent , Water-based ink thickener, ethylene glycol, isocyanate cross-linking agent uniformly mixed and stirred white screen printing ink is used to print an oval solid print, dried and cured to form a porous layer (reversible water) Discolored layer) was formed. Furthermore, the store name is printed on the porous layer using a colorless transparent screen printing ink obtained by uniformly mixing and stirring a fluororesin water repellent, an oil thickener, and an oil slow dry solvent. By curing, a non-liquid-absorbing image was formed, and a business card substrate 2 was obtained (the same thing was formed for each business card size).
The surface of the business card substrate 2 showed the same changes and effects as in Example 2, and the back surface normally had a white ellipse visible on a blue background. By attaching the liquid to the white ellipse part, the porous layer part where the non-liquid absorbing image is not formed becomes transparent and the blue color of the background is visually recognized, and the store name which is the non-liquid absorbing image appears in white. there were.
In this state, when the liquid was dried by leaving it on a desk or the like, the porous layer became opaque and the non-absorbed image returned to the original white ellipse.

Production of Business Cards After the business card substrate 1 is cut into 10 business card sizes in accordance with each reversible thermochromic layer 3, character information such as a store name, name, and telephone number is printed on the surface using a general-purpose business card printing machine. A horizontal business card 6 was obtained by printing 5 on the oval cutout.
The surface of the obtained business card 6 shows the same changes and effects as in Example 2, and the back surface normally has a white ellipse on a blue background. By attaching water droplets, etc., the store name, which is a non-liquid-absorbing image, appeared in white.
In this state, when the liquid was dried by leaving it on a desk or the like, the porous layer became opaque and the non-absorbed image returned to the original white ellipse.
For this reason, by changing the color tone and changing the appearance using a liquid, it becomes a business card that can convey the desired image that cannot be visually recognized to the other party through communication, resulting in a higher visual effect and salesability. .

Example 6
Preparation of Business Card Base Material Printing ink containing 1,3,3-trimethylindolino-6 ′-(1-piperidinyl) -spironaphthoxazine in the upper left part of the surface of the business card base material 2 prepared in Example 4 ( It is normally colorless and turns purple when exposed to ultraviolet light. After printing the letters and logo of “PILOT” (registered trademark) on the screen, it is dried to provide a photochromic layer (reversible photochromic layer). Substrate 2 was obtained (similar printing was formed for each business card size).
The business card substrate 2 showed the same color change and effect as in Example 4 due to temperature change, and the photochromic layer was not visually recognized (colorless state). When ultraviolet light hits the surface of the business card substrate 2, the letters “PILOT” and the logo appear purple, and when left in a dark place, the color disappears again. This aspect change could be repeated.

Production of Business Card A horizontal business card 6 was obtained by printing character information 5 such as a company name, name, and address on the business card base 1 using a general-purpose business card printer.
The obtained business card 6 shows the same changes and effects as in Example 4 according to the temperature change. Further, on the surface, the upper right portion of the base material is normally visually recognized as the white color of the base material. By bringing the business card close to the window, etc., and exposing it to sunlight, a photochromic layer appeared and a purple “PILOT” letter and logo emerged.
When left on the desk or the like in this state, the colored state was maintained in the bright place and returned to the original white color (transparent) in the dark place according to the sunlight in the room. This aspect change could be repeated.
Therefore, it became a business card that can display a desired image that cannot be visually recognized in the normal state due to temperature change and the amount of ultraviolet rays, and has a higher visual effect and salesability.

T ₁ complete color development temperature T ₂ color development start temperature T ₃ color disappearance start temperature T ₄ complete color disappearance temperature ΔH hysteresis width 1 base material for business card 2 base material 3 reversible thermochromic layer 4 non-color change layer 5 character information 6 business card

Claims (11)

  A business card substrate on which character information is formed, wherein a reversible thermochromic layer is provided at least in part.   The business card substrate according to claim 1, wherein the reversible thermochromic layer is in an image form.   The business card substrate according to claim 1 or 2, wherein a non-discoloring layer is formed together with the reversible thermochromic layer.   The business card substrate according to any one of claims 1 to 3, wherein the reversible thermochromic layer changes color depending on body temperature.   The base material for business cards of Claim 4 whose discoloration temperature of the said reversible thermochromic layer is 25 degreeC or more and 40 degrees C or less.   The business card substrate according to any one of claims 1 to 3, wherein a color change temperature of the reversible thermochromic layer is from 41C to 80C.   The business card substrate according to any one of claims 1 to 6, wherein the business card substrate is cut into a plurality of business card sizes, and a reversible thermochromic layer is formed on the business card substrate after cutting. The business card substrate described.   The business card substrate according to any one of claims 1 to 7, wherein a reversible water discoloration layer and / or a reversible light discoloration layer is provided.   A business card in which character information is formed on the business card substrate according to any one of claims 1 to 8.   The business card according to claim 9, wherein the character information is printed with a reversible thermochromic ink.   The business card according to claim 9 or 10, wherein a reversible thermochromic layer is formed in the vicinity of the outer edge of the base material of the business card.

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