JP2006200895A - Temperature control medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature control medium surely controllable at the proper temperature, by allowing anybody to easily confirm whether or not temperature control is put in a possible state without relying on an experience. <P>SOLUTION: An emulsifying liquid 3 being liquid at the room temperature and coagulating when cooled up to the predetermined temperature, is stored in a containing material 2 composed of a sheet body, and the periphery is sealed. While, a first area A presenting the same color as a color before coagulation and a second area presenting the same color as a color after the coagulation, are arranged so as to have on an upper surface of a layout sheet 4. Next, the containing material 2 for storing the emulsifying liquid 3 is arranged on this layout sheet 4 so as to straddle these two areas A and B. The emulsifying liquid 3 melts by a temperature rise, and separates in a phase. The temperature control medium 1 is formed with such a constitution. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a liquid at room temperature, in which it is possible to easily confirm the temperature history of whether or not the article is once exposed to an atmosphere at a refrigerated temperature and then exposed to an atmosphere at a higher temperature. In addition, the present invention relates to a temperature control medium using an emulsion that solidifies when cooled to a predetermined temperature.

  In recent years, as the number of packages delivered in a frozen or refrigerated state further increases, delivery means such as courier services for transporting these packages while maintaining a predetermined temperature to a delivery destination have become widespread. When delivering a package using such delivery means, for example, when loading a package from a refrigeration / refrigeration facility at the collection source to a delivery vehicle, or when reloading a package between delivery vehicles, take the package from the delivery vehicle and deliver it to the delivery destination. When the baggage must be kept frozen or refrigerated, the baggage may be exposed to a high temperature atmosphere or a room temperature atmosphere by direct sunlight.

  In addition, it is required that the package be kept frozen or refrigerated even after it has been delivered to the delivery destination while being kept frozen or refrigerated. If the contents of the baggage are foods or pharmaceuticals, if they are not kept in a frozen or refrigerated state, they may be altered or a variety of germs may be propagated, which may impair the quality. In extreme cases, food poisoning and medical accidents can occur if food and pharmaceuticals are not kept frozen or refrigerated. What requires such strict temperature control includes, for example, various chemicals used in the chemical field and the photographic field in addition to foods and pharmaceuticals.

Conventionally, the following method has been proposed as a method for simply confirming whether or not the temperature management as described above is normally performed.
For example, Patent Document 1 discloses an emulsion (emulsion) in which one or more of C7-15 higher alcohols in which a fat-soluble dye is dissolved are dispersed in a nonionic surfactant and water. In addition, an indicator for storage temperature management is disclosed which is filled in a sealed container. Under normal temperature conditions, the storage temperature management indicator has an opaque milky color because the color tone of the dye of the emulsion is suppressed in appearance. On the other hand, when this storage temperature control indicator is exposed to a temperature below the temperature at which the emulsion is frozen, all components of the emulsion are once solidified, but when the emulsion is melted again, the coarsened emulsion particles float. Then, an oil droplet or an oil layer having a dark color tone floats to the upper layer, and is separated into an aqueous layer and an oil droplet or an oil layer. Therefore, it is possible to call attention at the time of use that the article in the package including the storage temperature management indicator in which such a change is recognized may be deteriorated.

  Patent Document 2 selects only an O / W type emulsion layer obtained by emulsifying an oily substance that is liquid at room temperature and melts when the storage management temperature is exceeded with a nonionic surfactant and water, and the above oily substance only. A storage temperature control indicator is disclosed in which an oil-soluble pigment that diffuses and transmits oil is provided on the surface opposite to the emulsion layer, and an opaque layer that diffuses and transmits oil-based substances in a sealed container. In this storage temperature control indicator, when the O / W emulsion layer is frozen at below freezing and then thawed, it is phase-separated into water and an oily substance, and only this oily substance diffuses and permeates the barrier. Then, the oil-soluble dye provided on the barrier is dissolved, and further, the opaque layer on the oil-soluble dye is diffused and transmitted to develop or color. Thereby, it can be easily detected with the naked eye that there is an abnormality in an article requiring strict temperature control.

The conventional method described above has the following problems.
For one thing, since nonionic surfactants known to be environmental hormones are used, when the above storage temperature control indicator is used on foods or pharmaceuticals, its safety is reduced. It is difficult to secure. For example, if a sealed container filled with the above-mentioned emulsion is broken unconsciously, the emulsion may adhere to the skin, food, medicine, and the like. When the emulsified liquid adheres to the skin, the nonionic surfactant may be absorbed into the body from the skin and may be harmful to health. In addition, when the emulsified liquid adheres to food or medicine, the food or medicine is accidentally swallowed, and as a result, the nonionic surfactant may be absorbed into the body and harm the health.

  Further, the conventional temperature management indicator has a problem that the period of storage at room temperature is as short as several days to about 6 months, and it cannot be stably stored at room temperature for a long time.

In addition, these temperature management indicators indicate that there has been an abnormality in temperature management after that, on condition that the temperature reaches a preset temperature (hereinafter referred to as “starting temperature”) at which the emulsion liquid coagulates. It is to be notified when the state of the emulsified liquid changes, but when judging whether the emulsified liquid has reached the starting temperature or less, it is only possible to use the feeling of the emulsified liquid pressed with a finger as a clue. Nobody could easily confirm it without relying on experience. Therefore, the baggage that was stored and moved without reaching the starting temperature by mistake in the judgment will not change the state of the emulsified liquid even if there is an abnormality in the temperature control. If the proper temperature was maintained and the state of the emulsion was not changed, the bag was regarded as being stored and moved while maintaining the proper temperature.
JP 57-37227 A Japanese Patent Laid-Open No. 5-149797

  The present invention has been made in view of the above circumstances, and is safe to eat, can be stored stably at room temperature for a long period of time, and can be operated at a predetermined temperature as well as temperature control. It is an object of the present invention to provide a temperature management medium that can be easily confirmed by anyone without relying on experience, and that can be reliably managed at an appropriate temperature.

  In order to solve the above problems, the present invention provides at least an emulsified liquid that is liquid at room temperature and solidifies when cooled to a predetermined temperature, and an inclusion material made of a sheet body that encloses the emulsified liquid and seals the periphery. The temperature management medium is provided, wherein the inner packaging material is disposed so as to straddle a first region and a second region that exhibit colors corresponding to colors of the emulsion that change before and after the predetermined temperature, respectively. Provide a temperature management medium.

Here, the emulsion that is liquid at room temperature and coagulates when cooled to a predetermined temperature is, for example, a material that melts and phase-separates when heated, and consists of a lipid mixture containing water, fats and oils, and phospholipids. Say things.
The color corresponding to the color of the emulsion changing before and after the predetermined temperature means that the color of the emulsion of the present invention changes somewhat as it solidifies. However, this change in color is extremely discernable. Because it is difficult, the difference between the colors of the emulsion before the coagulation is similar or similar to the color of the emulsion before the coagulation, and the color that is the same as the color of the emulsion after the coagulation. Say. Therefore, the first region is a region that exhibits one of the colors before or after the solidification of the emulsion, and the second region is a region that exhibits the other color.

  According to such a configuration, the temperature management medium is a liquid at room temperature and filled with an emulsified liquid that solidifies when cooled to a predetermined temperature. Therefore, when this temperature control medium is attached to the outside of an article requiring temperature control or a box housing the article and cooled, the emulsified liquid is shown in advance. Whether one of the two colors is changed from the other color to the other color is visually informed. Therefore, the color of the emulsified liquid at the time of visual confirmation can be compared with the color of which of the two regions arranged across the two colors, and there is no ambiguity depending on memory or experience, no one But it can be easily determined.

Since at least a part of the inner packaging material is transparent, the state of the emulsified liquid showing the temperature history stored in the inner packaging material can be easily visually confirmed from the outside.
In addition, the emulsion is solidified below a predetermined temperature, melted by raising the temperature again to a temperature exceeding the predetermined temperature, phase-separated, once once phase-separated, it will not return to the original emulsion again. By optically identifying the phase-separated state, it is possible to determine whether or not the baggage provided with the temperature control medium using the emulsified liquid has been exposed to a higher temperature than set. Moreover, even if the emulsion of a temperature control medium is stored for 1 year or more at room temperature, it can maintain a stable dispersion state (emulsion form) without phase separation. In addition, because it is composed of a lipid mixture containing water, fats and phospholipids that does not adversely affect the human body, the emulsified liquid adheres to the skin, food, and medicines unconsciously. Even if it enters the body, it does not harm health.

The lipid mixture is preferably composed mainly of lecithin and lysolecithin. According to such a configuration, since the emulsion contains the surfactant lecithin and lysolecithin, it can be stably stored at room temperature for 1 year or longer.
Moreover, it is preferable that the said fats and oils are edible fats and oils which have triacylglycerol as a main component and solidify around the said predetermined temperature. According to such a configuration, the emulsified liquid is solidified at a predetermined temperature or lower, melted by raising the temperature of the emulsified liquid again to a temperature exceeding the predetermined temperature, phase-separated, and once the phase-separated, once again the original emulsified liquid I will not return.

In the temperature management medium having the above-described configuration, it is preferable that a third region exhibiting a color different from the two colors of the emulsion that changes around a predetermined temperature is provided between the two regions. The third region may be provided between the first region and the second region so that the first region and the second region are completely separated without contacting each other, or the first region and the second region are partially formed. You may provide so that the location which touches may remain.
According to such a configuration, since the third region exhibiting a color different from the two colors of the emulsion is provided, the two colors of the emulsion that change around the predetermined temperature are difficult to determine with similar colors. However, the color of the emulsified liquid is not assimilated with the two colors, and the color of the emulsified liquid can be clearly distinguished by the third area, and the color of the emulsified liquid is compared with the color of the third area. By doing so, it is possible to make a judgment without overlooking the color change of the emulsion, and it is possible to perform highly accurate temperature management.

The temperature control medium of the present invention contains an emulsified liquid that is liquid at room temperature and solidifies when cooled to a predetermined temperature in the encapsulating material, and the encapsulating material is colored before the emulsified liquid is solidified. The temperature management medium reaches a predetermined temperature and can be temperature-controlled because it is arranged so as to straddle the two areas on a mount having an area exhibiting a color and an area exhibiting a color after solidification. Anyone who can change the color without relying on experience can be confirmed with easy visual inspection.
Therefore, the temperature management medium of the present invention increases the certainty of starting the temperature management medium and can reliably perform management at an appropriate temperature. Moreover, it can utilize by installing in the exterior of the box which stores the articles which require temperature management. Furthermore, since the temperature management medium can be installed outside the box, the temperature history of the article in the box can be easily confirmed without opening the box, and the reliability of the article can be improved without breaking the product form. Can be maintained. Moreover, since at least a part of the inner packaging material has transparency, the state of the emulsified liquid showing the temperature history of the object to be measured can be easily confirmed even from the outside of the box.

Further, the temperature management medium of the present invention is different from the two colors of the emulsified liquid changing around the predetermined temperature between the area of the emulsified liquid before the solidification and the area after the solidified color. Since the third region exhibiting the color is provided, when the color of the emulsion and the two colors are both similar colors, the two regions where the emulsion changes around a predetermined temperature. As a result, it is difficult to confirm the change in color, and it is possible to perform highly accurate temperature management without overlooking the change in the color of the emulsion.
Therefore, according to the temperature management medium of the present invention, it is possible to easily manage the temperature of a package delivered by a home delivery service or the like.

Hereinafter, a temperature management medium embodying the present invention will be described in detail.
FIG. 1 is a schematic sectional view showing an embodiment of the temperature management medium according to the present invention, and FIG. 2 is a schematic plan view showing an embodiment of the temperature management medium according to the present invention. The state which arrange | positioned the accommodated inner packaging material so that it might straddle the area | region which exhibited the color before the coagulation | solidification of the emulsion provided adjacently and the area | region which exhibited the color after coagulation | solidification is represented.
In FIG. 1, reference numeral 1 is a temperature control medium, 2 is an inner packaging material, 3 is an emulsified liquid, 4 is a mount, A is a first region that exhibits a color before solidification, and B is a second that exhibits a color after solidification. Each area is shown.

The temperature management medium 1 of this embodiment includes a mount 2 that contains an emulsified liquid 3 and includes a first region A that exhibits a color before solidification and a second region B that exhibits a color after solidification. 4 is arranged so as to straddle the region exhibiting these two different colors.
The inner packaging material 2 is configured by using, for example, a sheet body, and is configured in a bag shape by folding one sheet body or overlapping two sheet bodies and sealing the periphery thereof. Moreover, at least a part of the inner packaging material 2 has transparency, and the state of the emulsified liquid 3 filled therein can be visually observed from the outside.
The sheet body is preferably made of a synthetic resin such as nylon or polyethylene and can be heat-welded. Specifically, a GL film which is a transparent vapor deposition barrier film manufactured by Toppan Printing Co., Ltd. can be used. The sheet body may be formed by laminating a plurality of films. The sheet body in the present embodiment has a double structure in which a film made of polyethylene resin for heat welding is laminated on the inner surface of a film made of nylon resin. Furthermore, it is desirable that the sheet body has low oxygen permeability and water vapor permeability.

The emulsified liquid 3 is liquid at normal temperature and solidifies when cooled to a predetermined temperature, and is configured by filling the inner packaging material 2 such as a bag.
The mount 4 has, on its surface, a first region A that exhibits the same color as the color before the emulsion 2 is solidified and a second region B that exhibits the same color as the color after the emulsion 2 is solidified. It has a color sample. In the present embodiment, as shown in FIGS. 1 and 2, the first region A is shown in dark color and the second region B is shown in light color.

Further, the mount 4 can be attached to the outside of the box housing the object to be measured, so that the first area A and the second area exhibit colors corresponding to before and after the solidification of the emulsified liquid 2, respectively. It is desirable to provide an adhesive portion on the back surface where B is not provided.
The box refers to a transportable container such as cardboard or polystyrene foam. Therefore, in this embodiment, in the temperature management medium 1, the inner material 2 and the surface where the first region A and the second region B are not provided, that is, the back surface of the mount 4 is directed to the box side, It is configured to be stuck and fixed to the outside of the box through the provided adhesive part. Thereby, the state of starting temperature and the state of the emulsion 3 can be confirmed from the outside, without opening a box. The temperature measurement object is accommodated inside the box having such a configuration, and is delivered or stored in a frozen or refrigerated state.

Next, the emulsion 3 will be described in detail.
Emulsion 3 is an emulsion composed of a lipid mixture containing water, fats and oils and phospholipids. In this emulsified liquid 3, either water or fats and oils form a dispersion medium (continuous phase) and the other forms a dispersed phase (discontinuous phase), and a lipid mixture containing phospholipid functions as a surfactant. One of water and fat is dispersed in the other in the form of fine particles. In addition, when the dispersion medium (continuous phase) is water and the dispersed phase (discontinuous phase) is oil or fat, the emulsified liquid 3 is an oil-in-water (Oil in Water type: O / W type) emulsion, When the dispersion medium (continuous phase) is fat and oil and the disperse phase (discontinuous phase) is water, a water-in-oil type (water in oil type: W / O type) emulsion is formed.

  In the emulsion 3, the ratio of water to fat (water: oil) is appropriately adjusted according to the target operating temperature of the temperature control medium 1 (temperature at which the emulsion 3 solidifies), but 5:95 ( wt: wt) to 95: 5 (wt: wt) is desirable, 10:90 (wt: wt) to 60:40 (wt: wt) is preferable, and 15:85 (wt: wt) to 30:70 (wt) : Wt) is particularly preferred.

  The water constituting the emulsified liquid 3 is not particularly limited, and any water can be used, but ion exchange water or distilled water is preferably used in consideration of the influence on lecithin and lysolecithin.

As fats and oils, the melting point is 0 ° C. or higher or 0 ° C. or lower, and the emulsion 3 is constituted with water using a surfactant near room temperature (about 23 ° C.). Examples thereof include those that are phase-separated from water by being heated to a temperature exceeding a predetermined temperature after being exposed to 0 ° C. to room temperature or lower. Examples of such fats and oils include edible fats and oils mainly composed of fats and oils such as triacylglycerol (TAG), diacylglycerol (DAG), and monoacylglycerol (MAG). In the emulsified liquid 3, one or more selected from these fats and oils are appropriately used depending on the target operating temperature of the temperature control medium 1 (temperature at which the emulsified liquid 3 is solidified). Further, either an oil or fat having a melting point of 0 ° C. or higher and an oil or fat having a melting point of 0 ° C. or lower are mixed at an appropriate ratio, or an oil or fat having a melting point of 0 ° C. or higher or an oil or fat having a melting point of 0 ° C. or lower By appropriately using one of them, the operating temperature range of the temperature management medium 1 can be controlled to a desired temperature range.
In the present invention, the predetermined temperature refers to a temperature in the range of −60 ° C. or higher and + 20 ° C. or lower.

  Moreover, as a lipid mixture containing a phospholipid, what has a lecithin and a lysolecithin as a main component is mentioned.

  In the emulsion 3, the lecithin functions as a surfactant for dispersing either one of water and fat into the other in the form of fine particles. Examples of lecithin include soybean lecithin represented by the following general formula (1), egg yolk lecithin containing egg yolk phospholipid represented by the following general formulas (5) to (8), and fish-derived lecithin. .

In the above general formula (1), R ₁ and R ₂ are composed of saturated and unsaturated hydrocarbons. B represents a base.
For example, when B is a base represented by the following formula (2), soybean lecithin represented by the above general formula (1) is phosphatidylcholine, and B is a base represented by the following formula (3). The soy lecithin represented by the above general formula (1) is phosphatidylethanolamine, and when B is a base represented by the following formula (4), the soy lecithin represented by the above general formula (1) Is phosphatidylinositol, and when B is a hydrogen atom, soybean lecithin represented by the general formula (1) is phosphatidic acid.

  As shown in the above formula (1), soybean lecithin has two fatty acid groups and one base. Soy lecithin is a natural emulsifier that has various properties such as antioxidant, mold release, dispersion, foaming / defoaming, water retention, protein / starch binding, and chocolate viscosity reduction. Yes. In addition, soybean lecithin is obtained by filtering soybean crude oil from which soybean is extracted, adding about 2% warm water and stirring, and drying the product separated from the oil layer in the form of a gum. Furthermore, soybean lecithin is inexpensive and can be supplied in large quantities and can be obtained in various states depending on the degree of purification. Therefore, the type can be selected depending on the use conditions.

  In egg yolk lecithin, egg yolk of chicken egg is composed of 48% moisture, 16% protein, and 33% lipid, and the component contained in 30% of this lipid is phospholipid. Egg yolk lipid is composed of 65% neutral fat, 30% phospholipid, and 4% cholesterol. Egg yolk phospholipids are 70-80% phosphatidylcholine of the above formula (5), 10-15% of phosphatidylethanolamine of the above formula (6), sphingomyelin of the above formula (7) ( (Sphingomyelin) 1 to 3%, and lysophosphatidylcholine (Lysophosphatidylcholine) 1 to 2% of the above formula (8).

  Like lecithin as described above, lysolecithin functions as a surfactant for dispersing either water or edible fats and oils in the emulsion 3 in the form of fine particles. As lysolecithin, the soybean lecithin represented by the above general formula (1), the lecithin represented by the above general formulas (5) to (8), and the like are lysed to obtain a structure in which one fatty acid is taken from lecithin. The eggplant is listed. Here, lysification refers to elimination of the fatty acid at the second position of the glycerin group possessed by lecithin using the enzyme Phospholipase A2.

  Lysolecithin is a natural emulsifier that has various properties such as antioxidant, mold release, dispersion, foaming / defoaming, water retention, protein / starch binding, and chocolate viscosity reduction. ing.

  In the emulsified liquid 3, the blending amount of the lipid mixture containing phospholipid is preferably 0.1 parts by mass or more and 40 parts by mass or less, and more preferably 1 part by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the fats and oils. .

  When the blending amount of the lipid mixture containing phospholipid is less than 0.1 parts by mass with respect to 100 parts by mass of the fat and oil, it is difficult to emulsify. On the other hand, when the blending amount of the lipid mixture containing phospholipid exceeds 40 parts by mass with respect to 100 parts by mass of the oil and fat, the oil and fat and the phospholipid are difficult to disperse in water and are not emulsified well.

  The blending ratio of lecithin and lysolecithin is appropriately adjusted according to the target operating temperature of the temperature control medium 1 (temperature at which the emulsion 3 is solidified), but is 20:80 (wt: wt) to 80: 20 (wt: wt) is preferable, and 70:30 (wt: wt) to 30:70 (wt: wt) is more preferable.

  Moreover, in order to adjust the freezing point to a desired temperature range, you may mix | blend saccharides and water-soluble polymer with the emulsion 3. The freezing point of the emulsified liquid 3 can be adjusted to a desired temperature range by changing the type and blending amount of saccharides and water-soluble polymers.

  Examples of the saccharide include monosaccharides such as fructose, glucose, galactose, and mannose, disaccharides such as maltose, sucrose, lactose, and cellobiose, oligosaccharides such as stachyose and raffinose, pectin, galactan, starch, amylose, bululan, and arabic. Examples include polysaccharides such as gum, hyaluronic acid, sodium chondroitin sulfate, and carboxymethulquitin. Among these, monosaccharides and disaccharides whose molecular weight is known from the meaning of freezing point adjustment are desirable.

  Examples of the water-soluble polymer include sodium alginate, cellulose derivatives (eg, methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, etc.), gelatin, polyacrylic acid samide, polyoxyethylene oxide, polyoxypropylene oxide, polyvinyl alcohol. , Carboxyvinyl polymer, polyvinylpyrrolidone, polyvinylpyrrolidone-vinyl acetate copolymer, vinyl acetate-crotonic acid copolymer, sodium polyacrylate, isobutene-maleic anhydride copolymer, vinyl methyl ether-maleic anhydride copolymer , Maleic anhydride, polyacrylamide, polyvinyl ether and the like. Since the water-soluble polymer tends to be highly viscous and difficult to emulsify as the degree of polymerization increases, it is preferable to use a water-soluble polymer having a weight average molecular weight of 100,000 or less.

  In addition, the inner packaging material 2 has a portion (space) for containing the emulsion 3 and is made of a material that can optically confirm the phase separation of the emulsion 3. And harmless material. Examples of ingredients that are harmless to eat include pullulan, wafer, gum, and candy. Examples of the form include a tubular shape, a plate shape, a film shape, and a spherical shape. If only phase separation is to be confirmed, the inner packaging material 2 may be made of a transparent material only in the vicinity of the boundary between the water phase and the oil phase obtained by phase separation of the emulsified liquid 3, and the other material may be made of an opaque material. .

  In addition, a gas such as air is enclosed in the inner packaging material 2 so that the volume of the liquid contained in the inner packaging material 2 is not affected by the phase separation of the emulsified liquid 3. You can keep it.

  Further, the temperature management medium 1 of this embodiment uses phase separation of the emulsified liquid 3 in the inner packaging material 2. That is, in the temperature control medium 1, the emulsion 3 is a stable and uniform white liquid near room temperature (about 23 ° C.), and the emulsion 3 solidifies at a predetermined temperature or lower, for example, 0 ° C. to room temperature or lower. The emulsion 3 is phase-separated by raising the temperature again to a temperature exceeding the predetermined temperature (temperature exceeding the melting point of the oil, fat, lecithin and lysolecithin constituting the emulsion 3), and a transparent aqueous phase and an opaque oil phase Phase separation, and once the phase separation is carried out, it does not return to the original emulsion again (irreversible). By identifying the phase-separated state optically, for example, visually or with a sensor, it is possible to determine whether or not the package equipped with the temperature management medium 1 has been exposed to a higher temperature than set. Moreover, since the phase separation of the emulsified liquid 3 is irreversible, it is impossible to hide that the temperature management medium 1 has been exposed to an environment of a predetermined temperature or higher unless it is removed from the package. Therefore, according to the temperature management medium 1, the temperature management of a package delivered by a courier can be easily performed.

  Also, as a technology that utilizes the properties of the aqueous phase that becomes transparent after phase separation, when confirming the aqueous phase visually or with a sensor, an identification symbol or character is placed on the other side of the aqueous phase and the information on the ground is displayed. It is also possible to accurately and quantitatively confirm whether or not phase separation has occurred by reading or identifying the reflected light by providing a mirror surface.

In the temperature control medium 1 of this embodiment, the emulsion 3 contains the surfactants lecithin and lysolecithin, and the lecithin functions as a lipophilic surfactant, and the lysolecithin functions as a hydrophilic surfactant and is emulsified. When lysolecithin is formed, finer particles are formed, and the surfactants are arranged without gaps at the interface, so that it can be stably stored at room temperature for 1 year or more. That is, since the temperature control medium 1 can be stably maintained in a dispersed state (emulsion form) without phase separation of the emulsified liquid 3 even when stored at room temperature for one year or more, it is produced in large quantities in advance. An appropriate number can be used as necessary.
Moreover, even if it exposes the emulsion 3 to 35-40 degreeC atmosphere for 3 months, and performs a thermal acceleration test, a change is not seen. Moreover, even if the emulsion 3 is exposed to an atmosphere of about 23 ° C. for 6 months, it is stable without change.

  Moreover, since the emulsion 3 is composed of a lipid mixture containing water, fats and oils and phospholipids that does not adversely affect the human body, the emulsion 3 adheres to the skin, food, and medicine without being conscious of it, As a result, even if the emulsion enters the body, it does not harm health. Therefore, the temperature management medium 1 has extremely high safety because there is no possibility of an accident even if it is used by being attached to the outside of a box that contains food or medicine. Therefore, the present invention provides a temperature management medium that can be used in a wide range of fields including a field that has been difficult to use in the past, and that does not necessarily require packaging, so that the cost can be reduced.

  Moreover, the emulsion 3 can be made into the form of a highly viscous thing by selecting suitably the combination of fats and oils and the lipid mixture containing a phospholipid. If it does in this way, it will be easy to handle the emulsified liquid 3 without spilling darkly, and the freedom degree at the time of using the temperature control medium 1 will improve.

Next, an example of the manufacturing method of the emulsion 3 of this embodiment is demonstrated.
First, lysolecithin is dissolved in water to prepare an aqueous solution of lysolecithin.
Subsequently, lecithin is melt | dissolved in fats and oils, and fats and oils mixed liquid is adjusted. In addition, when using 2 or more types of fats and oils, after mixing these previously, a lecithin is melt | dissolved in this oil-fat mixture.
Next, the oil / fat mixture is gradually added to the aqueous solution of lysolecithin while stirring, and either water or oil / fat is dispersed in the form of fine particles in the other to obtain an emulsion 3.
Then, after the emulsified liquid 3 is filled in the inner packaging material 2, the inner packaging material 2 is sealed, and the inner packaging material 2 is a first region A having a color before solidification and a second color having a color after solidification. The temperature management medium 1 is obtained by arranging on the mount 4 having the region B so as to straddle the regions exhibiting the two different colors. At this time, a gas such as air may be enclosed in a portion of the encapsulating material 2 that is not filled with the emulsion 3.

Moreover, an example of the manufacturing method of the inner packaging material 2 is demonstrated based on FIG.
First, the sheet body 20 is pulled out from the sheet roll 21 (see FIG. 3A). Next, the sheet body 20 is folded and doubled so that the side edge portions 20a of the sheet body 20 are brought together (see FIG. 3B). Next, the side edge portions 20a of the overlapped sheet body 20 are heat-welded to form a side alignment portion 21A, and the sheet body 20 is referred to as a tubular body (hereinafter referred to as “tubular sheet body 20”). (See FIG. 3C). Thereafter, the lower end portion of the cylindrical sheet body 20 is thermally welded to form a bottom portion (not shown), and then the cylindrical sheet body 20 is filled with the emulsified liquid 3 and further divided at regular intervals. Then, the barrel portion of the cylindrical sheet body 20 is heat-welded in a direction orthogonal to the side mating portion 21A to form the segmented mating portion 21B (see FIG. 3D). And the cylindrical sheet body 20 is cut | disconnected by the division | segmentation part 21B, and it is set as the inner packaging material 2 (refer FIG.3 (e)).

When the temperature management medium 1 is accommodated in the box 10 to which the temperature management medium 1 configured as described above is attached to the outside, first, the temperature management medium 1 has a room temperature (about 23 ° C. as shown in FIG. 4). ) In the vicinity, the emulsified liquid 3 is dark and has the same color as the first area A that has the same color as that of the emulsified liquid 2 on the mount 4 and the color after the coagulation of the emulsified liquid 2. When compared with both of the presented second regions B, it can be visually confirmed that the emulsified liquid 3 exhibits the same dark color as the first region A that exhibits the same color as the color before solidification. Next, when this is cooled and the temperature control medium 1 reaches a starting temperature which is a preset temperature at which the emulsion liquid is solidified, the emulsion liquid 3 changes from a dark color to a light color as shown in FIG. When compared with both of the two regions A and B, it can be visually confirmed that the emulsion 3 exhibits the same light color as the second region B that exhibits the same color as the color after coagulation. Thereby, it can be visually confirmed that the temperature management medium 1 reaches the starting temperature and is used at an appropriate temperature.
When the temperature management medium 1 is returned to room temperature, the emulsion 3 is phase-separated into a transparent aqueous phase 31 and an opaque oil phase 32 as shown in FIG. It can be visually confirmed that there was.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further more concretely, this invention is not limited to a following example.

Example 1
First, in a bag-like soft packaging material made of a two-layer sheet laminated with a transparent film of polyethylene and nylon, a 4 ° C. start-up type emulsified liquid whose temperature at which coagulation is started is set to 4 ° C. is filled. By sealing the periphery using a sealer, an inner packaging material of 20 mm × 20 mm and a thickness of about 2 mm was produced. In addition, an area that exhibits the same color as the color before emulsification (before coagulation) of the emulsified liquid filled in the inner packaging material and an area that exhibits the same color as the color after activation (after coagulation) are adjacent to each other on the mount. Each was printed to prepare a color sample mount. Subsequently, the temperature control medium A was produced by arrange | positioning the inner packaging material so that two colors might be straddled on this color sample mount.
Then, the temperature control medium A is put in a refrigerator set at 4 ° C. and left to stand for one day, then taken out, and the fact that the preset starting temperature has been reached is indicated by the color of the taken emulsion and the color sample mount. This was confirmed by comparing the color. The results are shown in Table 1. Further, this temperature control medium A was placed at a room temperature of 22 ° C., and it was confirmed whether or not the emulsified liquid really reached the starting temperature. Furthermore, unauthorized re-cooling confirmation was performed when it was put in the refrigerator again and cooled to 4 ° C. The results are also shown in Table 1.

(Comparative Example 1)
Further, as Comparative Example 1, the same 4 ° C. start-up type emulsion as in Example 1 was filled into a bag-like soft packaging material composed of a two-layer sheet laminated with a transparent film of polyethylene and nylon, and its surroundings. Was sealed using an impulse sealer to prepare a temperature control medium B of 20 mm × 20 mm and a thickness of about 2 mm.
And like Example 1, this temperature control medium B was put in the refrigerator set to 4 degreeC, and it was confirmed by pressing the emulsion liquid with a finger | toe that it reached | attained to the preset starting temperature. The results are shown in Table 1.

(Comparative Example 2)
Moreover, as Comparative Example 2, the same 4 ° C. start-up type emulsion as in Example 1 was filled into a hard container made of a two-layer sheet obtained by laminating and laminating transparent films of vinyl chloride and polyethylene, and the mouth portion was filled. By sealing, a temperature control medium C of 20 mm × 20 mm × about 2 mm was produced.
And like Example 1, this temperature control medium C was put in the refrigerator set to 4 degreeC, and it was confirmed by pressing the emulsification material with a finger | toe that it reached | attained the preset starting temperature. The results are shown in Table 1.

  From the results shown in Table 1, in the temperature control medium A of the present invention of Example 1, the flexible inner material filled with the emulsified liquid has the first region A and the emulsified liquid 2 exhibiting the same color as the color before solidification. Since the two regions A and B are provided across the color sample board having the second region B exhibiting the same color as the solidified color of the emulsion, the color of the emulsified liquid is By comparing which color of the two regions A and B had the same color as that of the two regions A and B, it was possible to easily confirm that the starting temperature had been reached visually. Moreover, when the temperature control medium A was returned to normal temperature, it was confirmed that there was an abnormality in temperature control due to the phase separation of the emulsion. Furthermore, when the temperature control medium A is cooled to the starting temperature, it can be confirmed that the starting temperature has been reached by comparison with the colors exhibited by the two regions A and B. Since it did not return to the normal state, it was possible to confirm unauthorized re-cooling after abnormal temperature management.

  On the other hand, in the temperature control medium B of Comparative Example 1, the hard inclusion material filled with the emulsified liquid is the same as the color after the coagulation of the first region A and the emulsified liquid 2 that have the same color as the color before the coagulation. Since it is not provided on the color sample board having the second region B exhibiting color, it is difficult to confirm that the starting temperature has been reached by visual observation. It was judged whether or not the starting temperature was reached due to the hardness, and since it felt somewhat harder than at normal temperature, it was considered that the starting temperature was reached, but the accuracy was very poor. Therefore, it can be seen that it is possible to easily and accurately confirm whether or not the temperature control medium has reached the start-up temperature by providing the color sample mount that exhibits the same color as the color before and after the solidification of the emulsion.

  In addition, the temperature control medium C of Comparative Example 2 is also composed of the first region A having the same color as the color before solidification and the color after solidification of the emulsion 2 and the flexible packaging material filled with the emulsion. Since it is difficult to confirm that the starting temperature has been reached by visual observation because it is not provided on the color sample board having the second region B exhibiting the same color, the emulsified liquid Although it was tried to determine whether the starting temperature was reached or not, the hard container was hard and the hardness of the emulsified liquid could not be confirmed. Therefore, it can be seen that by providing the color sample mount that exhibits the same color as the color before and after the solidification of the emulsion, it is possible to accurately and easily confirm whether or not the temperature management medium has reached the starting temperature. It can be seen that the emulsified liquid can be confirmed tactilely when filled in a flexible inner packaging material.

  Thereby, the temperature management medium A in Example 1 of this invention can show a highly accurate temperature history, and it turns out that it is effective for the temperature management of the package accompanying the preservation | save and movement which kept the frozen / refrigerated state. . In addition, it can be easily understood that the temperature management medium A of Example 1 is being used at an appropriate temperature, so that it can be surely performed more effectively.

In the above embodiment, the first region A that exhibits the same color as the color before the emulsion liquid coagulation and the second region B that exhibits the same color as the color after the emulsion liquid coagulation are adjacent to each other. However, the present invention is not limited to this. For example, as shown in FIG. 7, the first region A presenting the color before the coagulation of the emulsion 2 and the second color presenting after the coagulation. These three regions are formed on a color sample mount 14 provided with a third region C which exhibits a color different from the colors of the two regions A and B in a strip shape along the adjacent portion between the region B and the region B. It is good also as the temperature control medium 11 by the structure which arrange | positions the inner packaging material 2 which accommodated the emulsified liquid 3 so that A, B, and C may be straddled.
As a result, when the color of the emulsified liquid and the two colors are similar, the emulsified liquid is assimilated into the colors of the two regions that change around the predetermined temperature, making it difficult to check the color change. Without being overlooked, it is possible to perform highly accurate temperature control without overlooking that the color of the emulsion has changed.

In addition, the third region C has a belt-like shape along the adjacent portion between the first region A exhibiting the color before solidification of the emulsion 2 and the second region B exhibiting the color after solidification. For example, as shown in FIG. 8, when the two areas A and B are in contact with each other by dots, the color sample mount 104 is provided with the third areas C having the same shape on both sides thereof. Further, the temperature management medium 101 may be configured by arranging a circular inner packaging material 102 containing the emulsified liquid 3 so as to straddle these three regions A, B, and C.
As a result, when the color of the emulsified liquid and the two colors are similar, the emulsified liquid is assimilated into the colors of the two regions that change around the predetermined temperature, making it difficult to check the color change. Of course, it is easier to see that there has been a change in the color of the emulsified liquid, and accurate temperature control can be performed without overlooking the change.

  The temperature management medium of the present invention can be used for new forms that are used with foods and medicines in addition to the conventional use forms that are attached to the surface of luggage, so the status of temperature management of foods and medicines can be grasped. Can also be used to do.

It is a schematic sectional drawing which shows one Embodiment of the temperature management medium which concerns on this invention. 1 is a schematic plan view showing an embodiment of a temperature management medium according to the present invention. It is the schematic explaining sequentially the manufacturing method of the inner packaging material in the temperature control medium based on this invention. It is the schematic which shows the state before a temperature management medium reaches starting temperature in the box which attached the temperature management medium which concerns on this invention. It is the schematic which shows a state when a temperature management medium reaches starting temperature in the box which attached the temperature management medium which concerns on this invention. It is the schematic which shows the state after an emulsion changes in the box which attached the temperature control medium which concerns on this invention. It is a schematic plan view which shows other embodiment of the temperature management medium which concerns on this invention. It is a schematic plan view which shows other embodiment of the temperature management medium based on this invention.

Explanation of symbols

A ... first region, B ... second region, C ... third region, 1, 11, 101 ... temperature management medium, 2,102 ... inner packaging material, 3. ..Emulsified liquid, 4, 14, 104 ... mount, 10 ... box, 20 ... sheet, 31 ... water phase, 32 ... oil phase.

Claims (2)

An emulsion that is liquid at room temperature and solidifies when cooled to a predetermined temperature;
An enveloping material comprising a sheet body in which the emulsified liquid is sealed and the periphery is sealed;
A temperature management medium comprising at least
The temperature management medium, wherein the inner packaging material is disposed so as to straddle a first region and a second region each having a color corresponding to the color of the emulsified liquid that changes before and after the predetermined temperature. The temperature management medium according to claim 1, wherein a third region exhibiting a color different from the color of the emulsion is provided between the two regions.

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