KR20230137090A - Thermochromic composition consisting of a color changeable mixture, base with hidden mark formed by the thermochromic composition, articles with the same and manufacturing method for thereof - Google Patents

Abstract

The present invention is a differential temperature (sensitive temperature/cold temperature) discoloration composition, using the composition to create hidden marks in various forms such as letters, designs (patterns), numbers, symbols, etc. on glass/plastic/metal/film/paper. It relates to a technology for printing on substrates and articles made of ash, etc., and a method for manufacturing the same. According to the present invention, a process is performed by forming a hidden mark using a temperature changeable composition consisting of a color change mixture of a base ink and a thermosensitive pigment. can simplify, improve the speed of expression, improve the mystery, decoration, aesthetics and three-dimensionality of hidden marks compared to the prior art, prevent contamination, and reduce the defect rate.

Description

A thermochromic composition consisting of a color changing mixture, a substrate with a hidden mark formed using the same, an article, and a method for manufacturing the same AND MANUFACTURING METHOD FOR THEREOF}

The present invention is a change-temperature (sensitive/low-temperature) color changeable composition, which can be used to create various types of marks such as letters, designs, patterns, numbers, and symbols into glass/plastic/metal/film/paper, etc. It relates to printing technology on substrates and articles, and manufacturing methods thereof.

Technology for embossing or engraving various types of marks such as letters, designs, patterns, numbers, and symbols using variable temperature discoloration ink is widely used in various industrial fields. Marks made with thermochromic ink cannot be recognized below a certain temperature, but when the temperature is changed, the hidden mark is exposed to the outside and can be recognized.

Printing technologies that form hidden marks (hereinafter referred to as ‘hidden marks’) using variable temperature discoloration ink include Domestic Registered Patent No. 10-1981676, Domestic Patent No. 10-1390197, and Domestic Published Patent No. 10-2018. It is described in -0044253, Japanese Patent Laid-Open No. 10-1989-101512, Japanese Patent Laid-Open No. 10-1997-179072, and Japanese Patent Laid-Open No. 10-2004-321928.

However, the prior art proposed in the above-mentioned prior literature has the following problems.

First, the process is complicated. Conventionally, the process is complicated because a hidden mark is formed by forming a variable temperature color-changing ink layer and a printing ink layer (for example, white), which serves as a background of the variable temperature color-changing ink layer, on a substrate as separate layers. That is, the printing ink layer, which functions as the background color of the variable temperature color-changing ink layer, is formed as a separate layer from the variable temperature color-changing ink layer, top and bottom, or formed side by side on the same line, which has the disadvantage of being cumbersome and complicated to manufacture.

Second, it lacks mystery, decoration, aesthetics, and three-dimensionality due to the hidden marks that are expressed externally. Conventionally, the hidden mark, which is composed of a temperature-discoloring ink layer with the printing ink layer as the background color, simply disappears depending on temperature changes or is expressed externally, which has the disadvantage of lacking mystery, decoration, aesthetics, and three-dimensional effect due to the hidden mark. There is.

Third, it is easily contaminated. Conventionally, there is a problem that foreign substances easily stick to the hidden mark formed by the variable temperature discoloration ink layer due to static electricity, contaminating the surface.

Fourth, the defect rate increases. Conventionally, the adhesion and adhesion of the temperature changeable ink layer is low. In particular, when the pattern of the hidden mark formed with a variable temperature discoloration ink layer is thin, the adhesion becomes lower and easily lifts or separates from the substrate, which increases the defect rate.

Fifth, the speed of color development is slow. Conventionally, there is a problem of not being able to immediately respond to the temperature of the receptor due to slow heat conduction due to the material or thickness of the article containing the receptor.

JP 10-1989-101512 A, 1989. 04. 19. JP 10-1997-179072 A, 1997. 07. 11. JP 10-2004-321928 A, 2004. 11. 18. KR 10-1981676 B1, 2019. 05. 17. KR 10-1390197 B1, 2014. 04. 23.

Therefore, the purpose of the present invention is to provide a variable temperature discolorable composition that can simplify the process, a substrate and article equipped with a hidden mark formed using the same, and a method for manufacturing the same.

In addition, another object of the present invention is a temperature changeable composition that improves mystique, decoration, aesthetics and three-dimensionality due to hidden marks that are expressed externally according to temperature changes, substrates and articles with hidden marks formed using the same, Its manufacturing method is provided.

In addition, another object of the present invention is a temperature changeable composition that can minimize or prevent contamination caused by foreign substances adhering to the surface due to static electricity formed on the surface, substrates and articles provided with hidden marks formed using the same, and their It provides a manufacturing method.

In addition, another object of the present invention is a variable temperature discoloration composition that can reduce the defect rate by minimizing the lifting or detachment phenomenon of hidden marks by strengthening adhesion and adhesion, substrates and articles with hidden marks formed using the same, and manufacturing the same. It provides a method.

In addition, another object of the present invention is a variable temperature discoloration composition that improves the color development rate by increasing the reaction rate to the temperature of the receptor regardless of the material or thickness of the product, and a substrate and article with a hidden mark formed using the same. , its manufacturing method is provided.

In addition, the present invention is not limited to the above-described purposes, and various other purposes may be additionally provided through the techniques described through the embodiments and claims described later.

The present invention according to one aspect for achieving the above object includes a color change mixture that develops color depending on temperature, wherein the color change mixture is a mixture of a base ink that becomes a background color, a thermosensitive pigment, and a diluent. A discolorable composition is provided.

In addition, the color change mixture further includes an additive, and the additive may be at least one of an antistatic agent, a heat transfer agent, an adhesion enhancer, or an anti-wear agent.

In addition, the base ink may be composed of a primary color ink made up of white, yellow, red, black, blue, and orange colors alone, or may be made of a color ink obtained by mixing at least two of these primary color inks.

In addition, the thermosensitive pigment is a primary color composed solely of the following colors: red, rose red, magenta, vermilion, orange, yellow, green, yellow green, charm green, sky blue, Turkish blue, blue, dark blue, biolet, and black. It may be a pigment, or it may be made of a coloring pigment obtained by mixing at least two colors among these primary color pigments.

In addition, the content of the base ink in the color change mixture is 50 to 60% by weight, the content of the thermosensitive pigment is 30 to 40% by weight, and the remainder may be mixed with a diluent.

Additionally, in the color change mixture, the content of the diluent may be 1 to 2% by weight.

Additionally, in the color change mixture, the additive content may be 5 to 10% by weight.

In addition, the present invention according to another aspect for achieving the above object provides a substrate provided with a hidden mark formed from the variable temperature discoloration composition.

Additionally, the hidden mark may be at least one of a design, pattern, logo, letter, character, symbol, or number.

Additionally, the hidden mark may develop a color depending on the expression temperature of the thermosensitive pigment.

Additionally, the hidden mark is at least one of a design, pattern, logo, letter, character, symbol, or number, and the hidden mark may include a plurality of patterns.

Additionally, the plurality of patterns may each be formed from a color change mixture containing thermosensitive pigments of the same color, or may include thermosensitive pigments of different colors.

Additionally, the plurality of patterns may each be formed from a color change mixture containing thermosensitive pigments having the same content, or may be formed from a color change mixture containing thermosensitive pigments having different contents.

Additionally, the plurality of patterns may each be formed from a color change mixture containing base inks having the same color, or may be formed from a color change mixture containing base inks having different colors.

Additionally, the plurality of patterns may each be formed from a color change mixture containing base inks having the same content, or may be formed from a color change mixture containing base inks having different content.

In addition, the color change mixture further includes a heat transfer agent, and the plurality of patterns may be formed from a color change mixture containing the same heat transfer agent, or may be formed from a color change mixture containing different heat transfer agents.

Additionally, the plurality of patterns may each be formed at the same height in the entire area of the hidden mark, or may be formed in a portion of the entire area of the hidden mark to have a step difference from other portions.

Additionally, a heat conductive layer may be formed on or below the plurality of patterns.

Additionally, a heat conductive layer may be formed between the plurality of patterns.

Additionally, a heat conductive layer may be formed only on top of some of the plurality of patterns.

In addition, the present invention according to another aspect for achieving the above object provides an article to which the above substrate is attached or adhered.

Additionally, the substrate may be any one of glass, plastic, metal, film, or paper.

In addition, the present invention according to another aspect for achieving the above object includes a process of forming a hidden mark by printing the temperature changeable composition on the surface of a substrate; and a process of attaching or adhering the substrate on which the hidden mark is formed to a surface.

As described above, according to the present invention, the following effects can be obtained.

First, according to the present invention, a hidden mark is formed using a color changeable mixture of a base ink and a thermosensitive pigment, thereby forming a printing ink layer and a temperature changeable ink layer independently, as in the prior art. The process can be simplified compared to other manufacturing methods. In particular, it is easy to manufacture hidden marks with complex patterns.

Second, according to the present invention, a hidden mark (pattern of a hidden mark) is formed using a temperature changeable composition having different contents of base ink (or temperature sensitive pigment) to be expressed at different temperatures, thereby forming the same hidden mark through the temperature difference. Even within a mark, patterns can be expressed at different times to improve mystery, decoration, aesthetics, and three-dimensionality.

Third, according to the present invention, by adding at least one functional additive of an antistatic agent, a heat transfer agent, an adhesion enhancer, or an abrasion resistance agent to the variable temperature discoloration composition, contamination is prevented, the defect rate is reduced, and the mystery, aesthetics, and three-dimensional effect are improved. can do.

Fourth, according to the present invention, the heat of the receptor accommodated in the article is quickly transferred to the substrate attached or adhered to the article (the substrate on which the hidden mark is formed), thereby quickly reacting to the temperature of the receptor regardless of the material or thickness of the article. Marks can be provided.

Fifth, according to the present invention, when a hidden mark hidden in an article is displayed, the three-dimensional effect and aesthetics can be improved by providing a contrast difference between adjacent hidden marks or patterns of hidden marks.

Figure 1 is a diagram showing the degree of expression of hidden marks according to the composition ratio of a changeable temperature composition according to an embodiment of the present invention.
Figure 2 is a cross-sectional view schematically showing a substrate on which hidden marks are formed according to an embodiment of the present invention.
Figure 3 is a cross-sectional view schematically showing a hidden mark forming method according to an example of the present invention.
Figure 4 is a cross-sectional view schematically showing a hidden mark forming method according to another example of the present invention.
Figure 5 is a cross-sectional view schematically showing a substrate on which hidden marks are formed according to another embodiment of the present invention.
Figure 6 is a diagram schematically showing an application example of a substrate according to another embodiment of the present invention.
Figure 7 is a diagram showing an example of an article manufactured through the application example shown in Figure 6.
Figure 8 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.
Figure 9 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.
Figure 10 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.
Figure 11 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.
Figure 12 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.
Figure 13 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.
Figure 14 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.
Figure 15 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.
Figure 16 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Hereinafter, the advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. In addition, the same reference numerals refer to the same components throughout this specification. Additionally, the size and shape of each component shown in each drawing may be excessive, but this is for convenience of explanation and is not intended to be limiting.

Hereinafter, the technical features of the present invention will be described in detail.

The variable temperature discoloration composition according to an embodiment of the present invention includes a mixture whose color changes depending on temperature (hereinafter referred to as 'color change mixture'). The color change mixture includes 50 to 60% by weight of liquid base ink, 30 to 40% by weight of powdered thermosensitive pigment, and 1 to 2% by weight of diluent. Additionally, additives may be further mixed. Here, the additive may be at least one of an antistatic agent, a heat transfer agent, an adhesion enhancer, or an anti-wear agent.

Examples of specific composition ratios are shown in [Table 1] below.

Example Base
ink thermosensitive pigment
(15℃/blue) thermosensitive pigment
(15℃/Red) thermosensitive pigment
(15℃/Green) thermosensitive pigment
(15℃/Orange) additive diluent
Example 1
50~60% by weight 15~20
weight% 15~20
weight%
-
-
- 1~2
weight%
Example 2
50~60% by weight 15~20
weight% 15~20
weight%
-
- 5~10
weight% 1~2
weight%
Example 3
50~60
weight% 15~20
weight%
- 15~20
weight%
- 5~10
weight% 1~2
weight%
Example 4
50~60
weight% 15~20
weight%
-
- 15~20
weight% 5~10
weight% 1~2
weight%
Example 5
50~60
weight% 30~40
weight%
-
-
- 5~10
weight% 1~2
weight%
Example 6
50~60
weight%
- 30~40
weight%
-
- 5~10
weight% 1~2
weight%
Example 7
50~60
weight%
-
- 30~40
weight%
- 5~10
weight% 1~2
weight%
Example 8
50~60
weight%
-
-
- 30~40
weight% 5~10
weight% 1~2
weight%

As shown in [Table 1] above, as an example, a pigment that develops color at 15°C was used as the thermosensitive pigment. And, in addition to [Table 1] above, various combinations of embodiments are possible.

As an example, the thermosensitive pigment used with an expression temperature of 15°C can be changed depending on the target temperature for expression. This is due to the material and thickness of the substrate provided with a hidden mark formed from the variable temperature discoloration composition according to an embodiment of the present invention or the article to which the substrate is attached, the temperature of the receptor (beverage, coffee, etc.) accommodated inside the article, and the external It can be determined considering temperature.

For example, the material of the article with the sticker attached with the hidden mark formed from the variable temperature discoloration composition according to the embodiment of the present invention is metal, the thickness is 2 to 5 mm, and the temperature of the receptor accommodated in the article is 5. When the temperature is below ℃ and the external temperature is approximately 23℃, a thermosensitive pigment with an expression temperature of 15℃ is used to express at a receptor temperature of 5℃.

Therefore, in an embodiment of the present invention, as shown in [Table 1] above, a thermosensitive pigment with an expression temperature of 15°C was used, considering that the temperature of the receptor accommodated in the article is 5°C. At this time, the article to which the substrate on which the hidden mark is formed may be any one of glass/plastic/metal/film/paper, and the expression temperature of the thermosensitive pigment may be selected depending on the material and thickness of the substrate and article. there is. Here, the reason why the material and thickness of the substrate and article are considered is because they are closely related to the thermal conductivity that transfers heat to the receptor.

In the variable temperature discoloration composition according to an embodiment of the present invention, the content of the base ink is 50 to 60% by weight. Here, the base ink refers to the background color ink, which is composed of primary color ink alone among white, yellow, red, black, blue, and orange colors, or a color tone obtained by mixing at least two of these colors. It could be ink. In addition, any primary color ink known as background color ink can be used.

In the variable temperature color changeable composition according to an embodiment of the present invention, the content of the temperature sensitive pigment is 30 to 40% by weight. Thermosensitive pigments are pigments that develop colors at a specific temperature, for example, red, rose red, magenta, vermilion, orange, yellow, green, yellow green, charm green, and sky blue. It is a primary color pigment composed solely of the following colors: sky blue, turkish blue, blue, dark blue, violet, and black, or obtained by mixing at least two of these colors. It may be a coloring pigment. In addition, any pigment known as a thermosensitive pigment can be used.

In the present invention, when the content of the base ink is less than 50% by weight, the mixing ratio of the thermosensitive pigment is relatively high compared to the base ink, so expression occurs even at a temperature higher than the set target temperature (temperature of the receptor). For example, expression occurs in hidden marks even when the temperature of the receptor is above 5℃. In addition, the ratio of the base color compared to the color expressed through the thermosensitive pigment is low, so the saturation of the color expressed may be lowered and the clarity may be reduced.

In addition, when the content of the base ink exceeds 60% by weight, the mixing ratio of the thermosensitive pigment is relatively low compared to the base ink. In this case, expression does not occur immediately at the temperature of the receptor, that is, at 5°C, the target temperature (target expression temperature determined according to the temperature of the receptor considering the material, thickness, and external temperature of the product), but expression occurs at a lower temperature. The speed slows down. In addition, there is a problem that the vividness of the color expressed by the thermosensitive pigment is reduced because the ratio of the base color contrasting with the color expressed through the thermosensitive pigment is high.

Figure 1 is a diagram showing the degree of occurrence of hidden marks according to the content of the base ink according to the present invention. For example, a state in which hidden marks are formed on a film material using different temperature discoloring compositions with different white ink contents. This is a diagram showing the degree of expression. At this time, the article used was paper material, had the same thickness, and the external temperature was 23°C.

Figure 1 (a) shows an article (1) with a hidden mark formed on a base material made of a changeable color change composition containing less than 50% by weight of white ink (more than 40% by weight of thermosensitive pigment) at 5°C. This is a diagram showing the expression state of the hidden mark (hM1) before the receptor is filled.

Figure 1 (b) shows an article (1) with a hidden mark formed on an article (1) under the same conditions (content of white ink and thermosensitive pigment, material and thickness of the article, external temperature) as in (a) of Figure 1. This is a diagram showing the expression state of the hidden mark (hM1) after filling the receptor at ℃ or higher.

As shown in (a) of FIG. 1, when the white ink content is less than 50% by weight, the mixing ratio of the thermosensitive pigment is relatively higher than that of the white ink, so that a hidden mark (hM1) is created even when the receptor is not filled in the article 1. ) can be seen that the afterimage is expressed relatively clearly. In addition, as shown in Figure 1 (b), it can be seen that the hidden mark (hM1) is expressed even at a temperature higher than the set target temperature, for example, when the temperature of the receptor is 6°C or higher.

Figure 1 (c) shows an article (1) with a hidden mark formed on a base material made of a temperature changeable composition with a white ink content of more than 60% by weight (or a thermosensitive pigment content of less than 30% by weight). This is a diagram showing the expression state of the hidden mark (hM2) after the receptor at 5°C is filled.

As shown in Figure 1 (c), when the white ink content exceeds 60% by weight, the mixing ratio of the thermosensitive pigment is relatively low compared to the white ink, so even if the 5 ℃ receptor is filled in the article 1, hidden marks ( It can be seen that hM2) is expressed vaguely and not clearly.

Figure 1 (d) is a hidden mark formed from a variable temperature discoloration composition having a composition ratio according to an embodiment of the present invention, wherein the white ink content is 50 to 60% by weight (or the thermosensitive pigment content is 30 to 40% by weight). ) This is a diagram showing the expression state of the hidden mark (hM3) after a receptor at 5°C is filled in an article (1) attached with a base material on which a hidden mark is formed made of a different temperature discoloring composition.

As shown in Figure 1 (d), in the case of a hidden mark formed of a changeable temperature composition having a composition ratio according to an embodiment of the present invention, the moment a receptor having a temperature of 5°C, which is the target temperature, is quickly filled in the article (1) It can be seen that the hidden mark (hM3) is clearly expressed.

Meanwhile, the variable temperature discoloration composition according to an embodiment of the present invention may include a diluent. Anone (cyclohexanone) can be used as the diluent.

In addition, the variable temperature discoloration composition according to an embodiment of the present invention may further include an additive. The additive may include at least one of an antistatic agent, a heat transfer agent, an adhesion enhancer, or an anti-wear agent, and the total content may be in the range of 5 to 10% by weight.

The antistatic agent suppresses the generation of static electricity to prevent foreign substances from attaching, thereby preventing surface contamination. This antistatic agent may include at least one of a surfactant, a cationic polymer compound, and a polymer electrolyte. At this time, a cationic surfactant having an antistatic function can be used as the surfactant.

The heat transfer agent is an additive that increases the thermal conductivity of the changeable temperature composition and allows the color of the changeable composition to develop quickly. In other words, it is an additive that allows expression at lower temperatures within the range of 0 to 60°C. For example, the heat transfer agent may be at least one of metallic particles or conductive polymer particles. The metallic particles may include at least one selected from the group consisting of copper, aluminum, gold, silver, nickel, chromium, and alloy particles having excellent conductivity, or a mixture of two or more thereof. When such a heat transfer agent is added as an additive, the speed at which hidden marks appear can be increased by increasing the heat conductivity. Additionally, the vividness of colors expressed at the same temperature can be improved.

The adhesion enhancer is a reinforcing agent that strengthens the adhesion between the surface of the substrate and the printing layer made of a changeable temperature composition. An adhesive or an adhesive may be used. For example, the adhesive may include arylates or silicone raw materials, ester rubber phenolic resins, etc. It can also be formed by mixing auxiliaries such as pajama oil and low molecular substances such as polyisobutylene.

The wear resistance agent is an additive that prevents scratches, abrasion, or peeling on the surface of the hidden mark formed by a printing layer made of a changeable temperature composition. Depending on the material of the substrate on which the print layer made of a changeable temperature composition is formed, it is Teflon or silicone. , it may include at least one of carbon fiber, aramid fiber, graphite powder, or molybdenum.

Figure 2 is a cross-sectional view schematically showing a substrate on which hidden marks are formed according to an embodiment of the present invention.

Referring to Figure 2, the substrate 2 according to an embodiment of the present invention is a color change mixture of 50 to 60% by weight of white ink, 30 to 40% by weight of thermosensitive pigment, and the remainder is a mixture of diluents and/or additives. It includes a hidden mark (hM) formed from the above-described variable temperature discoloration composition.

The hidden mark (hM) may be at least one of a design, pattern, logo, letter, character, symbol, or number. In addition, all known shapes that can be expressed can be included.

The substrate 2 may be any one selected from glass, plastic, metal, film, or paper. Here, the film material may be in the form of a sticker or label.

The hidden mark (hM) can be formed on the substrate 2 using various known printing methods. For example, it can be formed on the substrate 2 using a printing method such as silk printing or pad printing, a method of attaching a cutting sheet, or a method using ultraviolet curing resin.

In addition, it can be formed through various processes.

Figure 3 is a cross-sectional view schematically showing a hidden mark forming method according to an example of the present invention.

As shown in Figure 3 (a), the surface of the substrate 2 is pretreated. That is, various foreign substances or organic contaminants, such as dust, on the surface of the substrate 2 are removed through the pretreatment process.

Afterwards, as shown in (b) of FIG. 3, a screen mask 3 is formed on the substrate 2 to form a hidden mark (hM). At this time, the screen mask 3 is formed in a portion where the hidden mark (hM) is not formed.

The process of forming the screen mask 3 may use a printing method such as silk printing or pad printing, a method of attaching a cutting sheet, or a method using ultraviolet curing resin.

Afterwards, a hidden mark (hM) is formed, as shown in (c) of FIG. 3. Here, the hidden mark (hM) may be a partial pattern or the entire shape of the shape to be expressed. Similar to the process of forming the screen mask 3, the hidden mark (hM) can be made using a printing method such as silk printing or pad printing, a method of attaching a cutting sheet, or a method using ultraviolet curing resin.

Afterwards, as shown in (d) of FIG. 3, the screen mask 3 is removed to complete the hidden mark (hM).

Figure 4 is a cross-sectional view schematically showing a hidden mark forming method according to another example of the present invention.

Referring to Figures 4 (a) and (b), after the surface of the substrate 2 is pretreated to remove foreign substances, a coating layer 4 is formed on the upper surface to form a hidden mark (hM). At this time, the coating layer 4 may be an ink layer made of a changeable temperature composition according to an embodiment of the present invention.

Thereafter, as shown in Figures 4 (c) and (d), after forming the screen mask 5, an etching process is performed to pattern the coated layer 4 into a desired shape to form a hidden mark (hM). At this time, the etching process can be performed using a laser irradiation method or a wet method (etching solution).

Thereafter, as shown in (e) of FIG. 4, the screen mask 5 is removed to form a hidden mark (hM).

Figure 5 is a cross-sectional view schematically showing a substrate on which hidden marks are formed according to another embodiment of the present invention.

Referring to FIG. 5, the substrate 21 according to another embodiment of the present invention includes hidden marks (hM11 and hM12) formed to have different expression characteristics at the same temperature. Hidden marks (hM11, hM12) are each made of different temperature discoloring compositions having different composition ratios.

The difference in composition ratio between the different temperature discoloring compositions forming the hidden mark (hM11) and the hidden mark (hM12) causes different expression characteristics in receptors at the same temperature, for example, 5°C. For example, the composition ratio can be adjusted so that the hidden mark (hM11) is expressed rapidly in the receptor at 5°C, and the hidden mark (hM12) is expressed relatively slowly in the receptor at the same 5°C. In addition, the composition ratio of the hidden mark (hM12) may be adjusted so that it is not expressed in the same receptor at 5°C, but is expressed at a different temperature, such as above 5°C or below 5°C.

Figure 6 is a diagram schematically showing an application example of a substrate according to another embodiment of the present invention.

Referring to FIG. 6, a plurality of hidden marks (hM13 to hM16) are formed on the surface of the substrate 22. At this time, each of the hidden marks (hM13 to hM16) may be a partial pattern of the shape to be ultimately expressed, or each of the hidden marks (hM13 to hM16) may represent a different shape.

Each hidden mark (hM13 to hM16) separated from the center of the substrate 22 has a different composition ratio. For example, the content of white ink can be uniformly increased (or the content of thermosensitive pigment can be decreased) from the center of the base material 22 to the outside of the overall composition ratio. Through this, colors can be expressed sequentially from the center of the base material 22 to the outside according to the temperature of the receptor, thereby providing mystery and aesthetics to the user.

Figure 7 is a diagram showing an example of an article manufactured through the application example shown in Figure 6.

As shown in Figure 7, within one design (hidden mark), the central area (see circle 'B') and the outer area are formed using different temperature discoloring compositions with different white ink contents. When a design is formed in this way, it can be seen that color development occurs in the outer area at the same temperature of the receptor, while color development does not occur in the central ('B') area.

Figure 8 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to FIG. 8, in the substrate 23 according to another embodiment of the present invention, hidden marks hM17 and hM18 are formed to have different heights. That is, the hidden marks hM17 and hM18 may be formed with steps on the surface of the substrate 23. At this time, hidden marks hM17 and hM18 having steps may be formed alternately or randomly on the surface of the substrate 23.

Figure 9 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to FIG. 9, in the substrate 24 according to another embodiment of the present invention, hidden marks (hM19, hM20) are formed to have different heights, for example, the hidden mark (hM20) has a relatively low height. may be formed to have an upper surface inclined to one side.

Figure 10 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to FIG. 10, in the substrate 25 according to another embodiment of the present invention, hidden marks (hM21, hM22) are formed to have different heights. For example, the hidden mark (hM22) has a relatively low height. may be formed in a stepped structure with the upper surface inclined to one side.

Figure 11 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to FIG. 11, in the substrate 26 according to another embodiment of the present invention, hidden marks (hM23, hM24) are formed to have different heights, for example, the hidden mark (hM24) has a relatively low height. Convex or concave irregularities may be formed on the upper surface.

The hidden marks shown in FIGS. 8 to 11 may have different levels as well as different amounts of white ink. Through this, it is possible to create a three-dimensional effect by expressing the light and dark of the color within the design relatively differently from the hidden mark formed adjacent to it.

Additionally, the hidden marks shown in FIGS. 8 to 11 may be spaced apart. The gap between them may be formed uniformly and regularly, or may be formed differently. To prevent printing spread when printing hidden marks, they can be formed at minimum intervals of 0.20 mm.

Figure 12 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to FIG. 12, in the substrate 27 according to another embodiment of the present invention, a heat conductive layer 6 is additionally formed between hidden marks (hM25). At this time, the heat conductive layer 6 may be made of a conductive thin film with excellent heat conductivity. The heat-conducting layer 6 may include at least one of copper, aluminum, gold, silver, nickel, chromium, or an alloy of two or more thereof.

Figure 13 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to FIG. 13, the substrate 28 according to another embodiment of the present invention is different from the substrate 27 shown in FIG. 12 in that the heat conductive layer 61 is formed to cover the upper part of the hidden mark (hM26) to conduct heat. It improves the characteristics and also functions as a protective layer to protect the hidden mark (hM26).

Figure 14 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to FIG. 14, the substrate 29 according to another embodiment of the present invention has a heat conductive layer 62 formed on the rear portion of the substrate 29, unlike the substrates 27 and 28 shown in FIGS. 12 and 13. do.

Figure 15 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to Figure 15, the substrate 30 according to another embodiment of the present invention is different from the substrates 27, 28, and 29 shown in Figures 12 to 14, and the heat conductive layer 63 has a hidden mark (hM28) ( or hidden mark pattern) is formed on the upper surface of the substrate 30 exposed between them. At this time, the height of the heat conductive layer 63 may be the same as the hidden mark (hM28) or may be lower than the hidden mark (hM28).

Figure 16 is a cross-sectional view schematically showing a substrate according to another embodiment of the present invention.

Referring to FIG. 16, the substrate 31 according to another embodiment of the present invention has the heat conductive layer 64 formed selectively only on the top or bottom of one of the hidden marks (hM29) (or hidden mark pattern). You can. Through this, the thermal conductivity can be controlled differently even between hidden marks.

Meanwhile, a protective film may be further formed on the substrates according to embodiments of the present invention to cover the hidden mark to protect the hidden mark. This can prevent damage or scratches to hidden marks. Additionally, the substrates can be used by attaching or adhering to various articles. Here, the method of attaching the substrate to the product is to adhere the back side of the substrate to the article using an adhesive, and the method of adhering the substrate to the article is to adhere the back side of the substrate to the article using an adhesive. At this time, the goods are eyeglass lenses, mirrors, cups, bottles (containers), transparent stickers, or transparent labels themselves, or miscellaneous goods, decorations, or home appliances equipped with transparent substrates such as mirrors, lenses, or glass on at least one side. It can be any one of them.

As described above, the technical idea of the present invention has been described in detail in the embodiments, but the embodiments described above are for explanation and not limitation. As such, a person skilled in the art will understand that various embodiments are possible through combination of embodiments of the present invention within the scope of the technical idea of the present invention.

1: Goods
2, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31: listed
3, 5: Screen mask
4: Coating layer
6, 61, 62, 63, 64: heat conduction layer
hM, hM1~hM3, hM11~hM29: Hidden mark

Claims (23)

A color changeable composition comprising a color change mixture that develops color depending on temperature, wherein the color change mixture is a mixture of a base ink that becomes a beige color, a temperature sensitive pigment, and a diluent.
According to claim 1,
The color change mixture further includes an additive, and the additive is at least one of an antistatic agent, a heat transfer agent, an adhesion enhancer, or an anti-wear agent.
According to claim 1,
The base ink is composed of a primary color ink made of only white, yellow, red, black, blue, and orange colors, or a color-changing ink obtained by mixing at least two of these primary color inks.
According to claim 1,
The thermosensitive pigment is a primary color pigment consisting of only one of the following colors: red, rose red, magenta, vermilion, orange, yellow, green, yellow green, charm green, sky blue, Turkish blue, blue, dark blue, biolet, and black. , a changeable temperature composition consisting of a coloring pigment obtained by mixing at least two colors among these primary color pigments.
According to claim 1,
In the color change mixture, the content of the base ink is 50 to 60% by weight, the content of the thermosensitive pigment is 30 to 40% by weight, and the remainder is a diluent.
According to claim 1,
In the color change mixture, the content of the diluent is 1 to 2% by weight.
According to claim 2,
In the color change mixture, the content of the additive is 5 to 10% by weight.
A substrate with a hidden mark formed from the temperature changeable composition of any one of claims 1 to 7.
According to claim 8,
The hidden mark is at least one of a design, pattern, logo, letter, character, symbol, or number.
According to claim 8,
The hidden mark is a base material that develops color depending on the development temperature of the thermosensitive pigment.
According to claim 8,
The hidden mark is at least one of a design, pattern, logo, letter, character, symbol, or number, and the hidden mark includes a plurality of patterns.
According to claim 11,
The plurality of patterns are each formed of a color-changing mixture containing temperature-sensitive pigments of the same color, or a substrate formed of a color-changing mixture containing temperature-sensitive pigments of different colors.
According to claim 11,
The plurality of patterns are each formed of a color-changing mixture containing temperature-sensitive pigments having the same content, or a color-changing mixture containing temperature-sensitive pigments having different content.
According to claim 11,
A substrate in which the plurality of patterns are each formed from a color-changing mixture containing base inks having the same color, or a color-changing mixture containing base inks having different colors.
According to claim 11,
The plurality of patterns are each formed of a color change mixture containing base inks having the same content, or a color change mixture containing base inks having different content.
According to claim 11,
The color change mixture further includes a heat transfer agent, and the plurality of patterns are each formed from a color change mixture containing the same heat transfer agent, or a color change mixture containing different heat transfer agents.
According to claim 11,
The plurality of patterns are each formed at the same height in the entire area of the hidden mark, or are formed to have a level difference from other portions in a portion of the entire area of the hidden mark.
According to claim 11,
A substrate having a heat-conducting layer formed on or below the plurality of patterns.
According to claim 11,
A substrate having a heat conductive layer formed between the plurality of patterns.
According to claim 11,
A substrate in which a heat-conducting layer is formed only on top of some of the plurality of patterns.
Articles to which the description of Article 8 is attached or adhered.
According to claim 21,
The base material is any one of glass material, plastic material, metal material, film material, or paper material.
A process of forming a hidden mark by printing the temperature changeable composition of any one of claims 1 to 7 on the surface of a substrate; and
A process of attaching or adhering the substrate on which the hidden mark is formed to a surface;
A method of manufacturing an article comprising a.