JP2001141577A - Temperature control method and temperature control member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature control method and a temperature control member capable of objectively and accurately recognizing a change in a coloring concentration of a temperature indication member which changes a color in response to a temperature and a time. SOLUTION: In a temperature control member 1 with a temperature indication member 2 which is responsive to a temperature for changing a color, the temperature indication member 2 is irreversible under an environmental temperature and changes in its coloring concentration at an initialized part in response to a temperature and a time under an atmosphere allowed to stand after it is initialized when heated and rapidly cooled. The coloring concentration of the temperature indication member 2 is compared with a coloring concentration mark 3 invariable with the temperature of the temperature indication member 2 to be controlled and previously put on a surface of the temperature control member 1. Accordingly, the temperature control is implemented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control method and a temperature control member for controlling the temperature of fruits and vegetables or fresh products using a temperature indicating member whose color or density changes depending on temperature and time.

[0002]

2. Description of the Related Art Among the conventionally used temperature indicating members, examples of a temperature indicating material whose color changes in response to temperature include, for example,
Spiropyrans, thermochromic organic dyes and CoC ₁₂ · ₂ (CH 2) such as ethylene derivative substituted fused aromatic ring such as Bien Tron and Jikisanchiren 6N ₄ · 10H ₂ O
And the like, or a combination of a metal complex salt crystal or a combination of an electron donating compound, an electron accepting compound and a polar organic compound.
The temperature of a temperature control label or the like using such a temperature indicating material is visually observed to determine how the color changes depending on the temperature, and the temperature is determined.

[0003] The temperature indicating material is roughly classified into a reversible type and an irreversible type. The reversible type is a type in which the color changes as many times as the temperature rises and falls, and the irreversible type changes the color at a certain temperature. It is a type that does not return.

[0004] In the case of the reversible type, it is used as a sign for drinking a drink such as beer, or when it is necessary to visually call attention.

The irreversible type (low temperature) is used for controlling the temperature of fruits and vegetables, fresh foods, and the like, and is described in Japanese Patent Publication No. 58-10709 and the like as having a temperature history. That is, ink whose viscosity changes with temperature (for example, ink in which a dye is dissolved in oleyl alcohol) penetrates through the penetrating material, and how long it takes to reach a temperature equal to or higher than the set temperature depending on the permeation length. You can check if you have been exposed.

Further, a plurality of layers including an ink layer, a separate layer, a porous layer, and a display section are formed on the label. Here, the separate layer is removed when the temperature control is started, and the porous layer is a layer for controlling the permeation time. In any case, in order to realize low-temperature irreversibility (when the set temperature is lower than room temperature), a storage method when temperature control is not started is required, and the structure is expensive and complicated.

Japanese Patent Application Laid-Open No. H8-197853 describes a method in which a glass transition temperature is set to a set temperature, and a warning is issued by utilizing the fact that the diffusion rate of molecules rapidly changes when the glass transition temperature is exceeded. I have.

[0008]

When the temperature indicating member is exposed to a temperature higher than the set temperature after the initialization, the color density of the initialized portion changes depending on the temperature and time, and the change in the color density is recognized. There is a problem that it is difficult to objectively determine the color density due to individual differences. In particular,
Unlike the case of Japanese Patent Application Laid-Open No. 8-10709, unlike the case of one-dimensionally indicating how long the ink has been exposed to a temperature equal to or higher than the set temperature based on the permeation length of the ink caused only by the time element, the temperature and the time are different. As an element, when the color density of the temperature indicating member changes due to the integrated value of the temperature and the time, it is extremely difficult to objectively specify the level.
Therefore, it is a problem how to objectively specify the level when the coloring density of the temperature indicating member changes with temperature and time.

Further, when the temperature control member is used, for example, as a label attached to a product such as fresh food,
It is unknown what kind of temperature control was performed, but if it was specified that temperature control was being performed, customers would find that the freshness of products that the temperature control was perceived to be poor was reduced, depending on the content of the description. And that the product remains unsold. In other words, the purpose of managing the temperature of products and the like is originally to perform finer grained product management under conditions that do not impair product value including freshness, etc. Only the person needs to be able to accurately grasp the information, and it is not always necessary to make it clear to the customers and the like. Therefore, when used for selling products, it is also an issue that only a manager can accurately grasp temperature management information without being recognized by general customers.

Accordingly, an object of the present invention is to provide a temperature management method and a temperature management member capable of objectively and correctly recognizing a change in color density of a temperature indicating member whose color changes according to temperature and time.

It is another object of the present invention to provide a temperature management method and a temperature management member in which only a manager can objectively and correctly recognize a change in the coloring density of a temperature indicating member whose color changes in accordance with temperature and time. And

[0012]

According to the first aspect of the present invention,
In a temperature management method using a temperature management member provided with a temperature indicating member that changes color in response to temperature, the temperature indicating member is irreversible at an ambient temperature, and after being initialized by heating and quenching, a standing atmosphere Depending on the temperature and time in the middle, the color density of the initialized portion changes, and a color density mark invariable to the temperature to be managed by the temperature indicating member is provided in advance on the surface of the temperature management member, The temperature management is performed by comparing the color density of the temperature indicating member with the color density mark.

According to a second aspect of the present invention, there is provided a temperature management method using a temperature management member provided with a temperature indicating member whose color changes in response to temperature, wherein the temperature indicating member is formed on a colored ink layer. It is irreversible under ambient temperature, and after being initialized by heating and quenching, the color density of the initialized part is different from the color of the colored ink layer depending on the temperature and time in the standing atmosphere, The temperature indicating member is overlapped with the colored ink layer, and the color of the overlapping portion by the color reduction method is changed by temperature and time, and the temperature of the colored member to be managed by the temperature indicating member in advance on the surface of the temperature management member. Invariant color sample is provided, the temperature indicating member is overlapped with the colored ink layer, and the temperature is controlled by comparing the color sample by the color reduction method of the overlapping portion and the color sample. That.

According to a third aspect of the present invention, there is provided the first or second aspect.
In the described temperature management method, the temperature indicating member provided on the surface of the temperature management member is characterized in that its coloring shape indicates semantic information different from the temperature management.

According to a fourth aspect of the present invention, in the temperature control method according to the third aspect, the color of the color of the temperature indicating member is a logo.

According to a fifth aspect of the present invention, in the temperature management method according to the third aspect, when the color of the temperature indicating member is colored, the color forming shape is a shape indicating information of a product.

According to a sixth aspect of the present invention, in the temperature management method according to the third aspect, when the temperature indicating member develops a color, the color forming shape is a shape indicating producer information regarding the product.

The invention according to claim 7 is the invention according to claims 1 to 6
In the temperature management method according to any one of the above, the shape of the color density mark or the color sample provided on the surface of the temperature management member is formed in a shape indicating semantic information different from the temperature management. I do.

According to an eighth aspect of the present invention, in the temperature management method according to the seventh aspect, the shape of the color density mark or the color sample is a shape indicating information of a product.

According to a ninth aspect of the present invention, in the temperature management method according to the seventh aspect, the shape of the color density mark or the color sample is a shape indicating producer information on a product.

According to a tenth aspect of the present invention, there is provided a temperature control member provided with a temperature indicating member whose color changes in response to temperature, wherein the temperature indicating member is irreversible at an ambient temperature;
After being initialized by heating and quenching, the color density of the initialized portion changes according to the temperature and time in the standing atmosphere, and the temperature to be controlled by the temperature indicating member in advance on the surface of the temperature controlling member. Is provided with an invariable color density mark.

According to an eleventh aspect of the present invention, there is provided a temperature control member provided with a temperature indicating member whose color changes in response to temperature, wherein the temperature indicating member is formed on a colored ink layer and is provided at an ambient temperature. It is irreversible, and after being initialized by heating and quenching, the color density of the initialized portion is different from the color of the colored ink layer depending on the temperature and time in the standing atmosphere, and A member is overlapped with the colored ink layer, and the color of the overlapped portion by the color reduction method changes according to temperature and time.

According to a twelfth aspect of the present invention, in the temperature management member according to the eleventh aspect, a color sample to be managed by the temperature indicating member is provided on the surface of the temperature management member in advance.

According to a thirteenth aspect of the present invention, in the temperature control member according to any one of the tenth to twelfth aspects, the temperature indicating member provided on the surface of the temperature control member has a different coloring shape from the temperature control member. It is characterized by indicating semantic information.

According to a fourteenth aspect of the present invention, in the temperature management member according to the thirteenth aspect, when the temperature indicating member develops a color, a color development shape is a logo mark shape.

According to a fifteenth aspect of the present invention, in the temperature management member according to the thirteenth aspect, when the temperature indicating member develops a color, the color forming shape is a shape indicating product information.

[0027] According to a sixteenth aspect of the present invention, in the temperature management member according to the thirteenth aspect, when the temperature indicating member develops a color, the color forming shape is a shape indicating producer information regarding the product.

According to a seventeenth aspect of the present invention, in the temperature management member according to any one of the tenth to sixteenth aspects, the shape of the color density mark or the color sample provided on the surface of the temperature management member corresponds to the temperature management. It is characterized in that it is formed in a shape indicating different semantic information.

The invention according to claim 18 is characterized in that, in the temperature management member according to claim 17, the shape of the color density mark or the color sample is a shape indicating information of a product.

According to a nineteenth aspect of the present invention, in the temperature management member according to the seventeenth aspect, the shape of the color density mark or the color sample is a shape indicating producer information regarding a product.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. First, what is shown in FIG. 1 is a temperature management member 1, and on the surface of this temperature management member 1,
The temperature indicating member 2 is partially provided. This temperature indicating member 2
Is initialized to an erased state by rapidly cooling after heating to a predetermined temperature or higher, and the color density changes depending on the temperature and time of the environment left after the initialization. The temperature management member 1 is provided with a plurality of color density marks 3 indicating multi-level densities in which color development proceeds with temperature and time after the temperature indicating member 2 is initialized. The color density mark 3 is formed of a color ink that does not depend on temperature (does not change with temperature), and indicates the degree of color development of the temperature indicating member 2. Exposure information 4 such as “good freshness”, “early” and “caution” is provided below the coloring density mark 3, and the temperature control member 1 is attached by recognizing the exposure information 4. It becomes possible to know the state of.

The temperature indicating member 2 used here is a member that develops color according to a function of temperature and time after initialization, that is, an integral value of temperature and time. The temperature indicating member 2 of the present embodiment can use a rewritable material, and can have the following configuration.

Electron-donating color-forming compounds (leuco dyes) Phenylmethane compounds (various fluorans, phenylphthalides, etc.), various indolyl phthalides, spiropyrans, leuco auramines, acyl or aryl auramines, etc.・ Electron-accepting compound (color developer) Compound having phenolic hydroxyl group, metal salt of compound having phenolic hydroxyl group, various triazoles, carboxylic acids, metal salt of carboxylic acid, etc. ・ Reversible material Steroid-based material, for example , Pregnenolone, methylandrostandiol, cholesterol and the like can be used. -Temperature display characteristic controlling agent (not necessary in some cases) Cycloalkanols, aromatic alcohols, and sensitizers used in thermal paper that are stable in the crystal state at room temperature are selected according to the characteristics. For example, cyclododecanol.

The above-mentioned three-component containing no temperature-controlling agent or a four-component system containing the temperature-controlling agent is applied in a state of being dispersed in a binder resin.

-As the resin, styrene resin, styrene methacrylic acid, acrylic resin,
Polyurethane or the like can be used.

More specifically, the composition of the temperature indicating member 2 is as follows. <Temperature member> Leuco dye: H3035 (manufactured by Yamada Chemical Co., Ltd.) 1 part by weight Developer: propyl gallate (PG) 1 part by weight Reversible agent: pregnenolone (PRN) 10 parts by weight Temperature-controlling agent: cyclododecanol (CD) .5 parts by weight Binder resin: styrene methacrylic acid (A-91: manufactured by Dainippon Ink) ... 5 parts by weight

<Production method> A binder resin was dissolved in 84 parts by weight of a mixed solvent of toluene and cyclohexanone (4: 1), and a leuco dye, a color developer, a reversible agent, and a temperature control agent were added. After stirring for a time, a coating liquid is obtained.

The coating solution obtained as described above is applied by gravure printing onto the substrate 5 (synthetic paper in which high-quality paper is coated with PET) so that the dry film thickness of the temperature indicating member 2 becomes 10 μm. Dried. (Partially coated) Further, the temperature indicating member 2
Density a, b, by offset printing according to the color density of
Three types of color density marks 3 having the same cyan color and the density changed as H3035 of c are printed. The color density mark 3 is a
(B) and (c) are printed in order of density, and under the condition that the temperature indicating member 2 is colored under the coloring density mark 3 under the condition that the temperature indicating member 2 develops color, the attached product is exposed to high temperature. The contents indicating the state of are described in the exposure information 4. Here, the storage status “good freshness” is printed under a, the storage status “early” is printed under b, and the storage status “attention” is printed under c.

A protective layer 7 (OP varnish) is provided on the temperature indicating member 2 for initialization by a thermal head.
If necessary, an intermediate layer is provided between the ink layer and the protective layer 7, and the protective layer 7 is formed thereon (this intermediate layer is
Due to the compatibility with the varnish, it is provided, for example, when the adhesion or the protective layer 7 is provided and the characteristic change is large. The temperature management member 1 provided in this way compares the color development progress of the temperature indicating member 2 with the color density mark 3 and controls the temperature management member 1.
It is easy to know the status of the storage environment.

FIG. 2 is a cross-sectional view of the temperature control member 1 of the present embodiment. The temperature indicating member 2 is gravure printed on the substrate
After forming 0 μm, the color density mark 3 and the product information 9
Is printed by offset printing, and the protective layer 7 is formed by offset printing to have a thickness of 1 μm.

The principle and characteristics of the temperature indicating member 2 will be described with reference to FIGS. The temperature indicating member 2 is composed of an electron donating color-forming compound and an electron accepting compound, a reversible material, a temperature indicating property controlling agent, and a binder resin. Generally, an electron-donating color-forming compound refers to a precursor compound that develops color, and an electron-accepting compound refers to a developer, and the interaction between the electron-donating color-forming compound and the electron-accepting compound is The color develops when it becomes strong, and disappears when its action is weak. The reversible material used in the present embodiment indirectly enhances or weakens the interaction with the electron-donating color-forming compound or the electron-accepting compound, so that the electron-donating color-forming compound and the electron A material capable of reversibly changing the interaction of a receptive compound. The temperature indicating property controlling agent is a material for controlling the color development time and temperature to complete the erasure at initialization, and is a material related to the reversible material and the color developer. Also,
Upon initialization, it is well compatible with either the leuco dye or the developer and acts on the interaction between the developer and the reversible material.

FIG. 3 briefly shows the principle. The case where CVL was used for the leuco dye (A), propyl gallate for the developer (B), PRN for the reversible material (C), and CD for the temperature-controlling agent (D) are shown.

In the decoloring mode, the interaction between the leuco dye (A) and the developer (B) is weak, and the developer (B) interacts with the reversible material (C) and the temperature-controlling agent (D). The effect is strengthened. In the color development mode, the interaction between the leuco dye (A) and the developer (B) is strong, and the interaction between the reversible material (C) and the temperature-controlling agent (D) is strong. weak.

The thermodynamic reversibility of this system will be described with reference to FIG. In the color-developed state, the interaction between the leuco dye (A) and the color developer (B) is strong, and the reversible material (C) and the temperature-controlling agent (D) exist alone in a crystalline state. When heated from this state to a temperature higher than the melting point Tm of the temperature indicating member 2, the state changes to a fluid state, the interaction between the leuco dye (A) and the developer (B) is weakened, and the developer (B) and the reversible material The interaction between (C) and the thermodynamic characteristic controlling agent (D) is strengthened. When rapidly cooled from this state, the reversible material (C) and the temperature-control characteristic agent (D) solidify (amorphous state) while incorporating the color developer (B), and the decolored state is maintained. From that state,
When heated to a temperature equal to or higher than the glass transition temperature Tg, the molecules of the color developer (B) are diffused, and color development starts. The diffusion rate of the color developer (B) changes dramatically around the glass transition temperature Tg (glass transition temperature of the entire system). Further, when the heating is performed in a range from the crystallization temperature (Tc) to less than Tm, the diffusion speed is further increased, and the color is instantly formed.

In the invention described in Japanese Patent Application Laid-Open No. H8-197853, it is described that the glass transition temperature Tg can be used for a temperature control member. ) Is a method using the diffusion speed. That is, this is a method of detecting the boundary with that of FIG.

On the other hand, in the present embodiment,
In the principle diagram of FIG. 4, the following area is used. Is used for specifying the temperature as will be described later, and can be used as a warning.

The temperature indicating member 2 is used after being initialized by heating and rapid cooling. The initialization is performed using, for example, a thermal head.

FIG. 5 shows the initialization characteristics. Increasing the energy applied to the thermal head increases the reflectance (discolors).
The thermal head is JBE-56-8MGK made by Kyocera.
1-MG using 0.3 W applied power, 4 m printing cycle
s / line. The applied energy was controlled by controlling the pulse width. In the temperature indicating member 2 using PRN as the reversible material (C), the reflectance becomes almost maximum (erased) at an energy of 0.82 mJ / dot.

The reflectance was measured using a colorimeter manufactured by Minolta, and the reflectance was measured at a point having a wavelength of 620 nm.

FIG. 6 shows a sample initialized at 15 ° C., 20 ° C., 25 ° C. by applying an energy of 0.82 mJ / dot.
The relationship between the time and the reflectance at ° C. is shown. 15 ℃
In this case, the color development is rather slow, but at 20 ° C. and 25 ° C., the color development progresses with time. That is, it turns out that it is a function of temperature and time.

When the storage condition of an article to be stored changes depending on the temperature and time, in order to notify the danger of the article being exposed to a high temperature, the color density when the temperature indicating member 2 is initialized and the color is developed by the high temperature exposure after the initialization. The same density state as above is printed as a color density mark 3. In addition, below the color density mark 3, a warning of the storage state when the temperature indicating member 2 of the article to be stored reaches the density can be issued. For example, a color density mark 3 having the same color tone as that of the temperature indicating member 2 and a reflectance (620 nm) of 0.5, and exposure information 4 indicating the storage condition “good freshness”,
A color density mark 3 of 0.4 and exposure information 4 of the storage state "early" are provided, and a color density mark 3 of 0.3 and exposure information 4 of the storage state "attention" are provided. This means that the items to be stored are 2
When stored at 0 ° C., it can be seen that the reflectivity was exposed to this environment for about 9 hours, 0.4 for 14 hours, and 0.3 for 19 hours. At the same time
By reading the exposure information 4 of the article, the storage state can be easily known. When the reflectance of the temperature indicating member 2 is in the middle or the like and does not match, it is understood that the temperature indicating member 2 is in the middle state. For example, when the reflectance of the temperature indicating member 2 is 0.6, it is stored in a state better than the storage state “good freshness”. Further, the reflectance is 0.45
In the case of, the storage state is between "good freshness" and "early". Thus, the storage state can be determined while comparing the color density mark 3 with the color density mark 3. Here 2
Although an example in the case of 0 ° C. has been described, the same applies to each temperature. If the storage temperature is higher than 20 ° C., the time required to reach each reflectance is increased. In the case of a low temperature, the color development progresses slowly, so that a state better than the state of the long-term storage state “good freshness” is maintained.

That is, the temperature is managed while comparing the progress of the color density of the temperature indicating member 2 with the color density mark 3, and when the temperature indicating member 2 and the color density mark 3 match or are close to each other, the status is confirmed by the exposure information 4. While managing. Here, the case where there are three types of color density marks 3 has been described. However, if these types are indicated by more types, more strict management is possible. In addition, a plurality of temperature indicating members 2 are provided, each of which has a color density mark 3 and exposure information 4.
The provision of allows for more detailed management.

Although the temperature indicating member 2 is partially provided here, it may be provided on the entire surface of the base material 5 and the color density mark 3 may be partially printed with opaque white ink. Further, it is more preferable to provide a transparent ink layer (blank layer) 8 having substantially the same thickness as the temperature indicating member 2 so that the protective layer 7 can be easily applied around the temperature indicating member 2.

FIGS. 7 to 1 show a second embodiment of the present invention.
3 will be described. This embodiment is a temperature management member 1 in which a color sample 11 is provided so that the coloring state of the temperature indicating member 2 can be compared with the color sample 11. In other words, the method relates to the temperature management member 1 that performs temperature management by changing the density of the temperature indicating member 2 and that uses the temperature changing member 2 formed on colored ink to change the color by a subtractive color method. This will be specifically described with reference to FIGS. 7 and 8.

FIGS. 7 and 8 show the temperature control member 1 of the present embodiment. That is, in the temperature management member 1 provided with the temperature indicating member 2 which responds to the temperature, the temperature of the temperature indicating member 2 is changed by the temperature and time after the initialization due to the heating and rapid cooling. The temperature indicating member 2 is provided on the colored ink layer 10. A blank layer (transparent ink layer) 8 having substantially the same thickness as the temperature indicating member 2 is provided around the temperature indicating member 2 so as to reduce a step near the temperature indicating member 2.

The colored ink layer 10 has a color different from that when the temperature indicating member 2 is colored, the temperature indicating member 2 is cyan when colored, and the colored ink layer 10 is magenta. In addition,
In the environment of the temperature management member 1, the color ink layer 10 does not change with temperature and time (it does not change with temperature). The same material as that of the first embodiment can be used for the temperature indicating member 2. Here, unlike the previous case,
Polystyrene (PS) was used as the binder resin, and the other materials were the same.

<Temperature indicating member> Leuco dye: H3035 (Cyan, manufactured by Yamada Chemical Co., Ltd.) 1 part by weight Developer: propyl gallate (PG) 1 part by weight Reversible material : Pregnenolone (PRN) ······ 10 parts by weight Temperature control material: cyclododecanol (CD) ····· 5 parts by weight Spacer: Silica (E-2, manufactured by Tatsumorisha) 5 parts by weight Binder resin: polystyrene 4 parts by weight

<Production Method> A binder resin is completely dissolved in 84 parts by weight of a mixed solvent of toluene and cyclohexanone (4: 1) to obtain a resin solution. After adding a leuco dye, a color developer, a reversible material, a temperature-control characteristic material, and silica to the resin solution, glass beads Φ3 mm are put slightly below the liquid surface and dispersed with a paint shaker for about 2 hours to obtain a coating liquid.

The temperature control member 1 is made of, for example, a 25 μm
m, and product information 9, colored ink layer 10,
The color sample 11, the exposure information 4 and the like printed by offset printing are used. The above-mentioned temperature indicating member 2 and the blank layer 8 are gravure-printed on the colored ink layer 10 for about 10 minutes.
μm is formed. Further, a protective layer 7 is formed thereon by using an OP varnish.

When the blank layer 8 is initialized by the thermal head, the thickness of the temperature indicating member 2 has a step of 10 μm. This is to prevent the end of the temperature indicating member 2 from being completely erased due to the step. The blank layer 8 needs to have a film thickness substantially the same as that of the temperature indicating member 2, but the color or the like is not limited. Further, a protective layer 7 of an OP varnish (overprint varnish) is a protection when the temperature indicating member 2 is initialized by a thermal head. The protective layer 7 desirably has the moisture resistance and weather resistance of the temperature indicating member 2. In such a case, a protective layer is provided under the OP varnish separately from the protective layer 7 as necessary.

The colored ink layer 10 is printed with magenta ink. The color sample 11 shows that the color ink 10 and the temperature indicating member 2 have been exposed to high temperature after initialization, and the cyan concentration becomes high due to the high temperature exposure, and the color changes between the color ink layer 10 and the color change by the color reduction method at that time. This is a sample to compare the situation. The color sample 11 is provided to the extent that the temperature indicating member 2 can be identified. Exposure information 4 when the color mixture of the color sample 11, the colored ink layer 10, and the temperature indicating member 2 in the subtractive color method match.
Shows the situation of high temperature exposure.

The temperature indicating member 2 is used after being initialized by heating and rapid cooling. The initialization is performed using, for example, a thermal head.

FIG. 9 shows the initialization characteristics. Increasing the energy applied to the thermal head increases the reflectance (discolors).
Note that this characteristic is data when a temperature indicating member is provided on the top of Mytac paper (manufactured by Nichiban) instead of the colored ink 10 (The thermal head is KBE-5 manufactured by Kyocera Corporation).
The applied power is 0.3 W using 6-8 MGK1-MG,
The printing cycle was 4 ms / line). The applied energy was controlled by controlling the pulse width. 0.62mJ
At the energy of / dot, the reflectance becomes almost maximum (erased).

The reflectance was measured using a colorimeter manufactured by Minolta, and the reflectance was measured at a point having a wavelength of 620 nm.

FIG. 10 shows the relationship between the time at 25 ° C. and the reflectance of the sample initialized by applying the energy of 0.78 mJ / dot. This figure is a diagram showing a change in reflectance when the colored ink layer 10 is not provided.
In the present embodiment, by providing the temperature indicating member 2 having the characteristics shown in FIG. 10 on the colored ink layer 10, when the storage state of the stored article changes with temperature and time, the initialized temperature indicating member 2 Since the color changes from colorless to cyan, the color is changed by a color reduction method with the color ink layer 10. This is shown in FIG. In FIG. 11, the time when the temperature indicating member 2 was initialized was set to 0 hour, and the state of color change by the color reduction method with the colored ink layer 10 when left at 25 ° C. was measured by measuring L, a, and b. The Lab value changes with the cyan density change of the temperature indicating member 2 (see FIG. 10), which means that the color has changed.

The color change is magenta immediately after initialization, and changes from purple to blue in response to high temperature exposure. About 5 minutes after exposure to 25 ° C., the color changes from magenta to purple, and about 20 minutes changes to blue. Note that Lab was measured using a Minolta colorimeter CM-503C. This is CIE
A value expressed in the 1976 uniform perceived color (L ^* , a ^* , b ^* ) space, and the light source is a value when D50 is used.

When used for the colored ink layer 10, the color sample 1
Assuming that three are used for magenta, purple, and blue, level 1 means "good freshness", level 2 means "early", and level 3 means "attention". For example, if it was exposed to 25 ° C., it would have been about 5 minutes to change to purple, and about 20 minutes if it had changed to blue. Here, magenta is used for the colored ink layer 10, but the present invention is not limited to this. For example, if yellow is used, as shown in FIG.
The ab value changes. Accordingly, the color change by the subtractive color method is from yellow-green to green. The color sample 11 is changed according to the change. Similarly, when the colored ink layer 10 is red, the Lab change changes as shown in FIG. In addition, the color change by the subtractive color method changes from red to black. A color sample 11 may be provided accordingly. The color change is determined by the degree of color development of the temperature indicating member 2 after initialization. That is, if the temperature indicating characteristics of the temperature indicating member 2 are changed, the speed of the color change is changed. Although an example of polystyrene was used as the binder of the temperature indicating member 2, when this was changed to the styrene-methacrylic acid copolymer (A-91, manufactured by Dainippon Ink and Chemicals, Ltd.) shown in the first embodiment, the color development speed was increased. Slows down.

Although the characteristics are as shown in the first embodiment, the color change similarly occurs in accordance with the change of the temperature indicating member 2 as described above. Here, the colored ink layer 10
Although the example in which the temperature indicating member is formed on the temperature indicating member is described above, the transparent colored ink layer 10 may be provided on the temperature indicating member 2. H3035 (manufactured by Yamada Chemical Co., Ltd.), which turns cyan when the leuco dye develops color, was used.
It is possible to choose a color in relation to

A third embodiment of the present invention will be described with reference to FIGS. The material of the temperature indicating member 2 is the same as that of the first embodiment. First, the temperature indicating member 2 includes a substrate 5
(Synthetic paper coated with PET) 10μ dry film thickness
m and coated with a bar coater and dried. Further, after the protective layer 13 is formed by laminating, the product information 9, the color density mark 3 and the exposure information 4 are formed by white ink and colored ink, and the protective layer 7 is formed by OP.
The temperature control member 1 is completed by forming with varnish.

The white portions of the product information 9 and the characters and figures of the color density mark 3 are formed of white ink.

The white ink is not provided in the portion of the temperature indicating member 2 to be initialized. The protective layer 13 is made of polyvinyl alcohol (PVA117, manufactured by Kuraray) with a dry film thickness of 1 μm.
After coating and drying, UVHC8558 manufactured by Toshiba Silicone Co., Ltd. was applied at 3 μm, and dried by irradiation with UV light. The protective layer 13 is provided if necessary in the environment in which it is used.

It goes without saying that the temperature control member 1 obtained in this way has the same effect as in the first embodiment.

A fourth embodiment of the present invention will be described with reference to FIG. Although the color density mark 3 in each of the above-described embodiments is partially of three stages, the color density mark 3 of the present embodiment is a mark whose density continuously changes.

Therefore, the color of the temperature indicating member 2 is compared by comparing the density on the color density mark 3 and the density of the temperature indicating member 2 with which the density changes continuously as the temperature and time progress after the initialization. The position of the state can be recognized as a position on the color density mark 3, whereby the high-temperature exposure state can be easily confirmed.

A fifth embodiment of the present invention will be described with reference to FIGS. Schematically, in each of the above-described embodiments, the temperature management status is clearly indicated including the manager and the customer. However, in the present embodiment, only the manager is allowed to imply the temperature management status. Things.

That is, in the first embodiment, the color density changes after the temperature indicating member 2 is initialized, and the temperature control state can be easily understood by comparing the color density with the color density mark 3. did. In the second embodiment, the temperature control state can be grasped by comparing the change in color tone and the color sample 11 by the color reduction method using the temperature indicating member 2 and the colored ink layer 10. In this regard, in the present embodiment, the structure of the temperature management member 1 is almost the same, but it is assumed that the temperature management should not be known to anyone other than the manager. For example,
For a product to which the temperature control member 1 as described above is attached for temperature control, the temperature indicating member 2 and the color density mark 3
By comparing the information with the exposure information 4, the management status can be grasped by referring to the exposure information 4, but the information is known to the customer, and in some cases, the product is still fresh enough but the freshness is reduced. There is a problem such as being recognized as being sold and remaining unsold. That is, if the temperature indicating member 2, the color density mark 3, the color sample 11, and the exposure information 4 are explicitly provided on the temperature control member 1, the temperature control status will be known to anyone other than the administrator.

FIG. 17 showing an example of the present embodiment is based on the assumption of the first embodiment, and the coloring shape of the temperature indicating member 2 is exemplified by a logo “XYZ” (fictitious logo). It is formed at an appropriate position as a logo mark shape of the issuer (manager), and has a shape indicating semantic information completely unrelated to temperature management. That is, the temperature indicating member 2
In the specification, the color density is related to the temperature management, and the semantic information of the coloring shape is formed in a specification not related to the temperature management. The color density mark 3 is also formed at an appropriate position by a simple pattern in which, for example, three perfect circles are continuously formed so that the shape does not associate with a specific meaning (in this case, meaning information on temperature management). In addition, the exposure information 4 used in the above-described embodiment is deleted. That is, the meaning of each color density of the color density mark 3 is not specified, but is recognized by the administrator in advance with an implicit understanding.

FIG. 18, which shows another example of the present embodiment, is based on the assumption of the system of the second embodiment.
17 is the same as the example shown in FIG. 17 except that the temperature indicating member 2 is printed in a stacked form. That is, similarly to FIG. 17, the coloring shape of the temperature indicating member 2 is the logo shape of the manager, and is formed at an appropriate position. Similar to the color density mark 3 in FIG. 17, the color sample 11 has, for example, a simple pattern in which three perfect circles are continuously formed so that its shape does not associate with a specific meaning (here, meaning information on temperature management). And the exposure information 4 used in the above-described embodiment is deleted. That is, the meaning of each color of the color sample 11 is not specified, and is recognized in advance by the administrator with the tacit understanding.

According to the present embodiment, even if the temperature indicating member 2 is colored in the label-shaped temperature controlling member 1 attached to the product, the color forming shape is the logo mark shape.
The customer simply recognizes this as semantic information indicating the logo, and does not particularly consider the existence as a temperature management member. In particular, the color density mark 3 and the color sample 11
Is formed as a simple pattern, and the exposure information 4 is not added, so that the customer simply recognizes the color density mark 3 and the color sample 11 as a pattern, and recognizes that it is for temperature management. Never. Therefore,
According to such a temperature management member 1, the customer is not particularly conscious of the temperature management.

On the other hand, the manager uses the temperature indicating member 2 for temperature management in the logo mark portion, and the density information and color of the color density mark 3 and the color sample 11 are used for temperature management.
Since what level is indicated is implicitly recognized in advance, when the color density or color of the temperature indicating member 2 in the form of a logo changes, the color density of the color density mark 3 or the color of the color sample 11 changes. By comparing with, the storage environment can be objectively accurately and easily grasped. As a result, for example, when the color density or color becomes equivalent to “early” or “caution” in the above-described embodiment, the “discontinue product” to be sold at a discount based on the level recognition. And the like can be appropriately performed.

In the present embodiment, the coloring shape of the temperature indicating member 2 is a logo mark shape. However, any other shape may be used as long as it shows other semantic information irrelevant to temperature management. Various information used above, for example, product information, product name, product design (for example, product asparagus design), producer information about the product, production location information (characters and design), date, commercial message, etc. Can be used as appropriate. In particular, if information display is essential for the product, it is possible to make it difficult for the user to be conscious of temperature control. Color density mark 3 and color sample 11
Is not limited to the shape of a circle or the like, but may be more easily understood only by an administrator by making the shape notation such as an inconspicuous mark or character.

A sixth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the temperature indicator 2
Are several examples in which a shape other than the above-described logo mark shape is used.

In FIG. 19 showing the first example of the present embodiment,
This is an example in which the method of the first embodiment is assumed, and is an example in which product information is used as semantic information different from temperature management, and the coloring shape of the temperature indicating member 2 is, for example, a character notation of "directly from the production area". I have. As in the case of the above-described embodiment, when the wafer is exposed to a high temperature after being initialized by heating and quenching by the thermal head, the character “directly from production area” formed by the temperature indicating member 2 appears. Even if the product is exposed to a high temperature, the customer only feels that the information of the product sent directly from the production area is printed, and does not recognize that it is involved in temperature management.

FIG. 20, which shows a second example of the present embodiment,
The second embodiment is supposed to be the same as the example shown in FIG. 19 except that the temperature indicating member 2 is printed on the colored ink layer 10 in a laminated manner. As in the case of the above-described embodiment, when exposed to a high temperature after the initialization, the characters “directly from production” formed by the temperature indicating member 2 are colored, and the color is changed by the color ink layer 10 and the color reduction method. I do. In this way, even if the color of the character "directly from the place of origin" changes, the customer simply feels that the information of the commodity that is directly from the place of origin is printed, and does not recognize that it is involved in temperature management .

In FIG. 21 showing a third example of the present embodiment,
This is an example in which the method of the first embodiment is assumed, in which producer information on a product is used as semantic information different from temperature management, and the coloring shape of the temperature indicating member 2 is, for example, "Japan agricultural cooperative".
(Fictitious) character notation. As in the case of the above-described embodiment, when initialized by heating and quenching with a thermal head and then exposed to a high temperature, the character of "Japan Agricultural Cooperative" formed by the temperature indicating member 2 emerges.
Even if the product is exposed to a high temperature, the customer simply feels that the product information of the product of the Japan Agricultural Cooperative is printed, and does not recognize that the product is involved in temperature management.

FIG. 22 shows a fourth example of the present embodiment.
This is based on the assumption of the second embodiment, and is the same as the example shown in FIG. 21 except that the temperature indicating member 2 is printed on the colored ink layer 10 in a laminated manner. As in the case of the above-described embodiment, when exposed to a high temperature after the initialization, the character of "Japan Agricultural Cooperative" formed by the temperature indicating member 2 is colored, and the color is changed by the color ink layer 10 and the color reduction method. I do. Even if the color of the "Japan Agricultural Cooperative" character changes in this way, the customer will only feel that the product information of the product of the Nippon Agricultural Cooperative is printed and recognize that it is involved in temperature management. There is no.

A seventh embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the temperature indicator 2
Also, an example is shown in which both the color density mark 3 and the color sample 11 are shaped to indicate semantic information different from temperature management.

In FIG. 23 showing an example of the present embodiment, the temperature indicating member 2 is the same as the example shown in FIG.
Regarding the color density mark 3, for example, the density of each character of “Japan Agricultural Cooperative” indicating the producer information on the product is different. Have been. That is, the shape of the color density mark 3 is formed so as to indicate the semantic information of the producer as semantic information different from the temperature management.

FIG. 24 showing another example of the present embodiment is the same as the example shown in FIG. 20 with respect to the temperature indicating member 2 and the colored ink layer 10, but with respect to the color sample 11, for example, the producer information on the product is shown. The color of each character of “Japan Agricultural Cooperative” shown is different (not clearly shown in the drawing), and the color of each character is a pattern for comparing the color of the temperature indicating member 2 when exposed to high temperature. That is, the shape of the color sample 11 is formed so as to indicate the semantic information of the producer as semantic information different from the temperature management.

The color density mark 3 and the color sample 11 may be formed by using characters such as “directly from the place of production” indicating the information of the product without being limited to these examples. Furthermore, the color density mark 3 and the color sample 11 may be represented by using a pattern indicating the place of production, a pattern of a product (for example, a pattern of a product asparagus), or the like. The point is that the shape indicates semantic information different from the temperature management, and any shape may be used as long as the temperature is controlled but cannot be understood by the customer.

As the material used in each of the above-described embodiments of the present invention, the following materials can be used.

For example, as the electron-donating color-forming compound, leuco auramines, diaryl phthalides, polyaryl carbinols, acyl auramines, aryl auramines, rhodamine B lactams, indolines, spiropyrans, Examples thereof include electron donating organic substances such as fluorans, cyanine dyes, and crystal violet.

For <black type>, the following leuco dyes and the like can be used (not limited to these). PSD-15
0, PSD-184, PSD-300, PSD-80
2, PSD-290 (manufactured by Nippon Soda), CP-101, B
LACK-15, ODB (Yamamoto Kasei), ETAC,
ATP, BLACK-100, S-205, BLACK
-305, BLACK-500 (Yamada Chemical Co., Ltd.), TH
-107 (Hodogaya Chemical Co., Ltd.)

For <blue>, the following leuco dyes can be used (but are not limited thereto). CVL, BLM
B (manufactured by Nippon Soda Co., Ltd.), BLUE-63, BLUE-50
2 (Yamamoto Kasei), BLUE-220 (Yamada Chemical), BLUE-3 (Hodogaya Chemical)

<Blue-green type> GN-169, GN-2, Gr
een-40 (Yamamoto Kasei), Green-300
(Yamada Chemical Co., Ltd.)

In addition, red or yellow dyes may be used.
In addition, it is possible to mix instead of one kind of material.

The electron-accepting compound is described in the developer of this embodiment as PG. However, the present invention is not limited to this, and phenols, phenol metal salts, carboxylic acid metal salts, sulfonic acid, sulfonic acid salt, Oxides such as phosphoric acids, metal phosphates, acid phosphates, acid phosphate metal salts, phosphorous acid, metal phosphites and the like can be used. For example, 2,4-dihydroxyacetone phenone (2,4-HAP), 2,5-HAP, 2,6
-HAP, 3,5-HAP, 2,3,4-HAP, 2,
4-dihydroxybenzophenone (2,4-HBP),
4,4-HBP, 2,3,4-HBP, 3,4-HB
P, 2,4,4'-HBP, 2,2 ', 4,4'-HB
P, 2,3-dihydrobenzoic acid, methyl 3,5-bihydrobenzoate, 4,4'-biphenol, 2,3,4,4
'-Tetrahydroxybenzophenone and the like can be used.

The electron-accepting compound is largely attributable to the color-forming speed (the time from the separation of the electron-accepting compound from the reversible material to the association with the electron-donating compound to form a color greatly depends on the material). Depending on the selection, the temperature control time can be changed in various ways.

Further, it is possible to change the temperature range in which the temperature is to be controlled by using a reversible material. The glass transition temperature of the three components in the case of using the pregnenolone shown in the present embodiment is 44 ° C., and at this temperature, the coloring speed changes greatly, but the coloring starts even below the glass transition temperature. If a reversible material of another steroid is used, the reaction temperature can be changed. For example, cholesterol, stigmasterol and the like can be used.

By using a plurality of reversible materials or by mixing them, a desired temperature control member can be obtained.

As the binder resin, a resin having an appropriate glass transition temperature (or softening temperature) in consideration of the color development speed and the measurement temperature range can be used.

Examples of such resins include polyethylenes, chlorinated polyethylenes, ethylene / vinyl acetate copolymers, ethylene / acrylic acid / maleic anhydride copolymers and other ethylene copolymers, polybutadienes, polyethylene terephthalate, and the like. Polybutylene terephthalate, polyesters such as polyethylene naphthalate, polypropylenes, polyisobutylenes, polyvinyl chlorides,
Polyvinylidene chlorides, polyvinyl acetates, polyvinyl alcohols, polyvinyl acetal, polyvinyl butyrals, fluororesins, acrylic resins, methacrylic resins, acrylonitrile copolymers, polystyrene, halogenated polystyrene, styrene methacrylic acid Styrene copolymers such as polymers, acetal resins, polyamides such as nylon 66 (trade name), polycarbonates, cellulose resins, phenol resins, urea resins, epoxy resins, polyurethane resins, diaryl Examples include phthalate resins, silicone resins, polyimide amides, polyether sulfones, polymethyl pentenes, polyether imides, polyvinyl carbazoles, and amorphous polyolefins. These resins are used by mixing one or more resins.

A sensitive temperature area can be provided by adding a cycloalkanol, an aromatic alcohol, a sensitizer for heat-sensitive paper, or the like as a temperature indicating characteristic control agent in accordance with the characteristics of the temperature indicating member 2. As such a material,
Benzyl alcohol and TP are effective such as cyclododecanol and cyclododecanediol.

In the present embodiment, the material coated on the surface-treated PET as the adhesion layer on the high-quality paper of the base material 8 is used, but the present invention is not limited to this. The substrate 8 may be a thermal paper or the like.

Further, here, a rewritable material of a type in which the density of color change is used is not limited to this, but a material that causes a color change as a function of temperature and time after initialization can be used.

A rewritable color, which is stable in color and erased by a thermal head at initialization and develops color as a function of temperature and time, is not limited to this. It goes without saying that a material of a type capable of decoloring may be used. Any temperature management member obtained in this way can easily determine the status of its management visually.

[0107]

According to the first aspect of the present invention, in a temperature management method using a temperature management member provided with a temperature indicating member whose color changes in response to temperature, the temperature indicating member is irreversible at an ambient temperature. After being initialized by heating and quenching, the color density of the initialized portion changes according to the temperature and time in the standing atmosphere, and the temperature indicating member is preliminarily placed on the surface of the temperature management member. A color density mark invariable to the temperature to be controlled is provided, and the temperature is controlled by comparing the color density of the temperature indicating member with the color density mark. The storage environment can be objectively accurately and easily grasped while comparing with the color density mark provided on the temperature control member. Constant is possible.

According to the second aspect of the present invention, in a temperature management method using a temperature management member provided with a temperature indicating member whose color changes in response to temperature, the temperature indicating member is formed on a colored ink layer. In addition, it is irreversible at ambient temperature, and after being initialized by heating and quenching, the color density of the initialized portion is different from the color of the colored ink layer according to the temperature and time in the standing atmosphere. Differently, the temperature indicating member overlaps with the colored ink layer, and the color of the overlapping portion by the color reduction method changes depending on the temperature and time, and the color to be managed by the temperature indicating member in advance on the surface of the temperature management member. A color sample that is invariant to the temperature is provided, and the temperature indicating member is overlapped with the colored ink layer, and the temperature is managed by comparing the color by the color reduction method of the overlapping portion with the color sample. Therefore, the temperature indicating member overlaps the colored ink layer, and the color of the overlapping portion of the temperature changing member by the color reduction method changes depending on the temperature and time, and the temperature is controlled by comparing the color with the color sample provided on the temperature controlling member. Therefore, the storage environment can be objectively accurately and easily grasped.

According to the third aspect of the present invention, in the temperature management method according to the first or second aspect, the temperature indicating member provided on the surface of the temperature managing member has a coloring shape different from that of the temperature management. The presence of a temperature indicating member whose coloring shape indicates semantic information different from temperature management is recognized by anyone other than the administrator according to the semantic information and is made to be specially conscious in association with the temperature management. The temperature control is not easily recognized by anyone other than the administrator, and the color density and color development are not recognized by the administrator who implicitly recognizes the presence of the temperature indicating member in advance. By comparing with a density mark or a color sample, the storage environment can be objectively accurately and easily grasped.

According to the fourth aspect of the present invention, in the temperature management method according to the third aspect, since the color of the color of the temperature indicating member is a logo, the label attached to a target product or the like is formed. In such cases, the logo indicating the name of the manufacturer, etc. is indispensable for the purpose of advertising, clarifying the manufacturer, etc. It is easy for people other than the person to recognize it as a mere logo mark, while maintaining the function as a logo mark, being involved in temperature management,
It is possible to make recognition more difficult.

According to the fifth aspect of the present invention, in the temperature management method according to the third aspect, since the coloring shape when the temperature indicating member is colored is a shape indicating the information of the product, it is attached to the target product. For labels, etc., the product information is a notation generally used, and by making the color of the temperature indicating member a shape that indicates such product information, it is merely a product Information,
While maintaining the function of indicating product information, it is possible to make it more difficult to recognize that the user is involved in temperature management.

According to the sixth aspect of the present invention, in the temperature management method according to the third aspect, the coloring shape when the temperature indicating member is colored is the shape indicating the producer information on the product, so that the target product is In the attached label, etc., the producer information on the product is a notation generally used, and the coloring of the temperature indicating member is set to a shape indicating the producer information on the product, so that the information other than the manager can be used. This makes it easier for a person to recognize the product information as producer information about the product, and makes it more difficult to recognize that the person is involved in temperature management while maintaining the function of indicating the producer information about the product.

According to the seventh aspect of the present invention, in the temperature management method according to any one of the first to sixth aspects, the shape of the color density mark or the color sample provided on the surface of the temperature management member is controlled by the temperature management. It is formed so as to show semantic information different from that of temperature control, so the existence of a color density mark or color sample whose shape shows semantic information different from temperature management is recognized by anyone other than the administrator as that semantic information It does not give special consciousness in connection with temperature control, and does not allow anyone other than the administrator to easily recognize that temperature control is being performed, but implies the existence of the color density mark or color sample and its meaning in advance. Managers who are aware of this must objectively accurately and easily grasp the storage environment by comparing the color density or color of the temperature indicator with these color density marks or color samples. Possible to become.

According to the eighth aspect of the present invention, in the temperature management method according to the seventh aspect, since the shape of the color density mark or the color sample is a shape indicating information of the product, it is attached to the target product. In the case of labels, etc., the product information is a notation generally used, and by making the shape of the color density mark or color sample a shape indicating such product information, it is simply It is easier to recognize as product information, while maintaining the function of indicating product information,
It can be made more difficult for the user to be involved in the temperature management.

According to a ninth aspect of the present invention, in the temperature management method according to the seventh aspect, since the shape of the color density mark or the color sample is a shape indicating producer information on the product, it is attached to the target product. For labels, etc., the producer information about the product is a notation generally used, and by making the shape of the color density mark or color sample a shape that indicates the producer information about such a product, This makes it easier for a person to recognize the product information as producer information about the product, and makes it more difficult to recognize that the person is involved in temperature management while maintaining the function of indicating the producer information about the product.

According to a tenth aspect of the present invention, in the temperature control member provided with a temperature indicating member whose color changes in response to temperature, the temperature indicating member is irreversible at an ambient temperature;
After being initialized by heating and quenching, the color density of the initialized portion changes according to the temperature and time in the standing atmosphere, and the temperature to be controlled by the temperature indicating member in advance on the surface of the temperature controlling member. Invariable color density marks are provided on the surface of the temperature control member, so that changes in color density can be compared with the color density marks provided on the temperature control member, and the storage environment can be objectively accurately and easily grasped. In addition, by providing the color density mark finely, accurate measurement becomes possible.

According to the eleventh aspect of the present invention, in the temperature management member provided with a temperature indicating member whose color changes in response to temperature, the temperature indicating member is formed on a colored ink layer and has an environmental temperature. It is irreversible below, and after being initialized by heating and quenching, depending on the temperature and time in the standing atmosphere, the color density of the initialized portion is different from the color of the colored ink layer, Since the temperature indicating member overlaps with the colored ink layer and the color of the overlapping portion by the color reduction method changes according to the temperature and time, the temperature indicating member overlaps with the colored ink layer and the color overlapping method of the overlapping portion is determined by the color reducing method. The color changes depending on the temperature and time, and the temperature is controlled while comparing the color with the color sample provided on the temperature control member, so that the storage environment can be objectively accurately and easily grasped. It becomes ability.

According to the twelfth aspect, according to the first aspect,
In the temperature control member according to 1, the colored sample to be managed by the temperature display member is provided on the surface of the temperature control member in advance.
Objective and accurate measurement becomes possible.

According to the thirteenth aspect, according to the first aspect,
In the temperature management member according to any one of 0 to 12, the temperature indicating member provided on the surface of the temperature management member is formed so that its coloring shape indicates semantic information different from the temperature management. The presence of a temperature indicating member whose coloring shape indicates semantic information different from temperature management is recognized by people other than the administrator according to the semantic information and is not associated with temperature management and makes it specially conscious. Does not make it easy to recognize that temperature control is being performed, but the administrator who implicitly recognizes the presence of the temperature indicating member in advance must compare the color density with the color density mark or color sample. Thus, the storage environment can be objectively accurately and easily grasped.

According to the fourteenth aspect of the present invention, the first aspect is provided.
In the temperature control member described in 3, the color of the temperature indicating member when it is colored is a logo, and therefore, in a label or the like attached to a target product or the like, the logo indicating the name of the manufacturer or the like is advertised. , It is indispensable for the purpose of specifying the manufacturer, etc.By making the coloring shape of the temperature indicating member such a logo mark shape, it becomes easier for people other than the administrator to recognize it as a simple logo mark, While maintaining the function as a logo mark, it is possible to make it more difficult to recognize that the function is involved in temperature management.

According to the fifteenth aspect, the first aspect is provided.
In the temperature management member described in 3, the color of the color of the temperature indicating member is a shape indicating the information of the product. Therefore, in the label or the like attached to the target product, the information of the product is generally used. It is a notation that is displayed, and by making the coloring shape of the temperature indicating member such a shape that indicates the product information, it becomes easier for people other than the administrator to recognize it as mere product information, and the function of indicating the product information is maintained In addition, it is possible to make it more difficult for the user to be involved in the temperature management.

According to the sixteenth aspect, according to the first aspect,
3. In the temperature management member described in 3, the colored shape when the temperature indicating member is colored is a shape indicating the producer information on the product, so that the label or the like attached to the target product includes the producer information on the product. Is a notation generally used, and by making the coloring shape of the temperature indicating member a shape indicating producer information on such a product, it becomes easier for people other than the manager to recognize it as mere producer information on the product, It is possible to make it more difficult to recognize that the user is involved in temperature management while maintaining the function of indicating producer information on the product.

According to the seventeenth aspect of the present invention, the first aspect
In the temperature management member according to any one of 0 to 16, the shape of the color density mark or the color sample provided on the surface of the temperature management member is formed so as to indicate semantic information different from the temperature management. The presence of a color density mark or color sample whose shape indicates semantic information different from temperature control is recognized by anyone other than the administrator according to the semantic information, and is not associated with temperature control and does not require special consciousness. Other than those who do not easily recognize that the temperature control is being performed, the color of the temperature indicating member should be indicated by the administrator who implicitly recognizes in advance the existence and meaning of the color density mark or color sample. By comparing the density or color with these color density marks or color samples, the storage environment can be objectively accurately and easily grasped.

According to the eighteenth aspect, according to the first aspect,
In the temperature control member according to 7, since the shape of the color density mark or the color sample is a shape indicating the information of the product, the information of the product is generally used in the label or the like attached to the target product. It is a notation, and by making the shape of the color density mark or color sample a shape that indicates such product information, it becomes easier for people other than the administrator to recognize it as mere product information, and a function that shows product information While maintaining the above, it is possible to make it more difficult to recognize that it is involved in the temperature management.

According to the nineteenth aspect of the present invention, in the temperature management member according to the seventeenth aspect, since the shape of the color density mark or the color sample is a shape indicating producer information on the product, it is attached to the target product. For labels, etc., the producer information about the product is a notation generally used, and by making the shape of the color density mark or color sample a shape that indicates the producer information about such a product, This makes it easier for a person to recognize the product information as producer information about the product, and makes it more difficult to recognize that the person is involved in temperature management while maintaining the function of indicating the producer information about the product.

[Brief description of the drawings]

FIG. 1 is a plan view of a temperature management member according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a temperature management member.

FIG. 3 is an explanatory view showing the principle of coloring and decoloring of the temperature indicating member.

FIG. 4 is a thermodynamic principle diagram of the temperature indicating member.

FIG. 5 is a graph showing erasing characteristics of a temperature indicating member.

FIG. 6 is a graph showing temperature characteristics of the temperature indicating member.

FIG. 7 is a plan view of a temperature management member according to a second embodiment of the present invention.

FIG. 8 is a sectional view of a temperature management member.

FIG. 9 is a graph showing the erasing characteristics of the temperature indicating member.

FIG. 10 is a graph showing temperature indicating characteristics of a temperature indicating member.

FIG. 11 is a graph showing a Lab value change of a mixed color of a temperature indicating member and a colored ink (magenta).

FIG. 12 is a graph showing a Lab value change of a mixed color of the temperature indicating member and the color ink (yellow).

FIG. 13 is a graph showing a Lab value change of a mixed color of the temperature indicating member and the colored ink (red).

FIG. 14 is a plan view of a temperature management member according to a third embodiment of the present invention.

FIG. 15 is a sectional view of a temperature management member.

FIG. 16 is a plan view of a temperature management member according to a fourth embodiment.

FIG. 17 is a plan view of an example of a temperature management member according to a fifth embodiment of the present invention.

FIG. 18 is a plan view of another example of the temperature management member according to the fifth embodiment of the present invention.

FIG. 19 is a plan view of a first example of a temperature management member according to the sixth embodiment of the present invention.

FIG. 20 is a plan view of a second example of the temperature management member according to the sixth embodiment of the present invention.

FIG. 21 is a plan view of a third example of the temperature management member according to the sixth embodiment of the present invention.

FIG. 22 is a plan view of a fourth example of the temperature management member according to the sixth embodiment of the present invention.

FIG. 23 is a plan view of an example of a temperature management member according to a seventh embodiment of the present invention.

FIG. 24 is a plan view of another example of the temperature management member according to the seventh embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature control member 2 Temperature indicating member 3 Color density mark 10 Colored ink layer 11 Color sample

Claims (19)

[Claims] 1. A temperature management method using a temperature management member provided with a temperature indicating member that changes color in response to temperature, wherein the temperature indicating member is irreversible at ambient temperature and is initialized by heating and quenching. After that, the color density of the initialized portion changes according to the temperature and time in the standing atmosphere, and a color density mark invariable to the temperature to be managed by the temperature indicating member in advance on the surface of the temperature management member. Wherein a temperature control is performed by comparing the color density of the temperature indicating member with the color density mark. 2. A temperature management method using a temperature management member provided with a temperature indicating member whose color changes in response to temperature, wherein said temperature indicating member is formed on a colored ink layer and is irreversible at ambient temperature. After being initialized by heating and quenching, depending on the temperature and time in the standing atmosphere, the color density of the initialized portion is different from the color of the colored ink layer, and the temperature indicating member is colored. The color by the color reduction method of the overlapping portion that overlaps with the ink layer is changed by temperature and time, and a color sample that is invariable to the color temperature to be managed by the temperature indicating member in advance on the surface of the temperature management member. A temperature management method comprising: providing the temperature indicating member with the color ink layer, and performing temperature management by comparing a color obtained by a color reduction method of the overlapping portion with the color sample. 3. The temperature management method according to claim 1, wherein the color of the temperature indicating member provided on the surface of the temperature management member indicates semantic information different from the temperature management. 4. The temperature control method according to claim 3, wherein the color of the color of the temperature indicating member is a logo. 5. The temperature management method according to claim 3, wherein the color forming shape when the temperature indicating member develops a color is a shape indicating product information. 6. The temperature management method according to claim 3, wherein a coloration shape when the temperature indicating member develops a color is a shape indicating producer information regarding the product. 7. The color density mark or the color sample provided on the surface of the temperature control member is formed in a shape indicating semantic information different from the temperature control. The temperature management method according to any one of the above. 8. The temperature management method according to claim 7, wherein the shape of the coloring density mark or the color sample is a shape indicating product information. 9. The temperature management method according to claim 7, wherein the shape of the color density mark or the color sample is a shape indicating producer information regarding the product. 10. A temperature management member provided with a temperature indicating member that changes color in response to temperature, wherein the temperature indicating member is irreversible at an ambient temperature, and is initialized after being heated and quenched, and then left to stand. The color density of the initialized portion changes in accordance with the temperature and time in the medium, and a color density mark invariable to the temperature to be managed by the temperature indicating member is provided on the surface of the temperature management member in advance. Characteristic temperature control member. 11. A temperature management member provided with a temperature indicating member whose color changes in response to temperature, wherein said temperature indicating member is formed on a colored ink layer and is irreversible at ambient temperature. After being initialized by quenching, the color density of the initialized portion is different from the color of the colored ink layer depending on the temperature and time in the standing atmosphere, and the temperature indicating member is different from the colored ink layer. A temperature management member characterized in that the color of the overlapping portion by the color reduction method changes with temperature and time. 12. The temperature management member according to claim 11, wherein a colored sample of the temperature management member to be managed is provided on the surface of the temperature management member in advance. 13. The temperature as claimed in claim 10, wherein the color of the temperature indicating member provided on the surface of the temperature controlling member indicates semantic information different from that of the temperature controlling member. Management members. 14. The temperature control member according to claim 13, wherein the color of the color of the temperature indicating member is a logo. 15. A color forming shape when the temperature indicating member develops a color is a shape indicating product information.
3. The temperature control member according to 3. 16. The temperature management member according to claim 13, wherein the color of the color of the temperature indicating member is a shape indicating producer information relating to the product. 17. The method according to claim 1, wherein the shape of the color density mark or the color sample provided on the surface of the temperature control member has a shape indicating semantic information different from the temperature control.
18. The temperature management member according to any one of 0 to 17. 18. The method according to claim 1, wherein the shape of the color density mark or the color sample is a shape indicating information of a product.
7. The temperature control member according to 7. 19. The temperature management member according to claim 17, wherein the shape of the color density mark or the color sample is a shape indicating producer information regarding the product.