JP2008195445A - Package body with carbon dioxide gas indicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a package body equipped with carbon dioxide gas indicator, which is kept free from defective appearance even when the relative humidity within the package becomes high, the gas indicator having an indication section with a favorable degree of water resistance. <P>SOLUTION: The carbon dioxide gas indicator is arranged between a primary container with carbon dioxide gas permeable property and an outside package body with non-permeable properties of carbon dioxide gas and water vapor, while the blending quantity of polyhydric alcohol is kept at 1 to 3 pts.wt. against 100 pts.wt. of the ink composition for detecting carbon dioxide gas. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a carbon dioxide gas indicator using an ink composition for detecting that a substituted gas atmosphere in a gas replacement packaging for storing food, beverages, medicines, etc. for a long period of time is maintained. Related to the package. In particular, the present invention relates to a packaging body in which the relative humidity of the space portion between the carbon dioxide and water vapor impermeable outer package and the carbon dioxide permeable primary container is increased.

  2. Description of the Related Art Conventionally, various types of carbon dioxide indicators that can easily confirm a change in gas atmosphere due to a pinhole in a gas replacement package in which a replacement gas containing carbon dioxide is sealed and occurrence of a seal failure have been put on the market.

  This carbon dioxide indicator contains a pH indicator, and if there is enough carbon dioxide in the surrounding atmosphere, the carbon dioxide gas dissolves in the water in the carbon dioxide indicator and shows weak acidity, resulting in a low pH value. The color tone of the pH indicator changes.

  For example, in the case of a package in which a carbon dioxide indicator and carbon dioxide gas are enclosed together with the contents in the exterior body, if a pinhole or the like is generated in the exterior body and carbon dioxide leaks, the carbon dioxide concentration in the atmosphere around the carbon dioxide indicator is It decreases and the pH value increases, and the color tone of the pH indicator changes accordingly. As described above, when the carbon dioxide indicator is used, the change in the carbon dioxide concentration in the atmosphere around the carbon dioxide indicator can be visually detected using the change in color tone of the pH indicator (see, for example, Patent Document 1). ).

  As such a carbon dioxide gas indicator, there is a carbon dioxide gas indicator ink containing a binder resin and a pH indicator, and a pH indicator portion printed on a support. Such a pH indicator can be printed on various exterior bodies and the like used for the package, so that it is easy to see and convenient. Since the presence of moisture is indispensable for maintaining a clear color tone change in the pH indicator, a binder resin that is dissolved or dispersed in water is used.

  However, carbon dioxide indicators printed using these inks, when the relative humidity of the surrounding atmosphere becomes high, excess water is supplied to the pH indicator, and the carbon dioxide indicator ink is redissolved, and its appearance is There was a problem of being damaged.

  The relative humidity in the exterior body varies depending on the contents, the external temperature and humidity, and the internal space volume. This is especially true for the contents. Foods, beverages, and pharmaceuticals each have a specific water activity represented by the following formula.

Relative humidity (% RH) = water activity × 100
This water activity causes the humidity in the exterior body to change significantly. For example, coffee, glue, tea, rice crackers, biscuits, chocolate 0.1 to 0.5, rice, caramel, boiled, medical ampoules 0.5 to 0.7, miso, fresh confectionery, dumplings, bread crumbs, cheese , Chikuwa, Akatsuki, medical solution bag etc. show 0.7-1. The higher the amount of moisture, the higher the relative humidity, causing the appearance of the carbonic acid indicator to be impaired.

In addition, in the case of contents with a high water content, for example, medical solution bags, the relative humidity of the space between the medical solution bag and the exterior body increases only by reducing the thickness of the film of the medical solution bag, that is, the primary container. However, excessive moisture was taken into the carbonic acid indicator, so that the carbonic acid indicator ink was re-dissolved and the appearance was impaired.
International Publication No. 01/044385 Pamphlet

  The present invention has been made in view of the above circumstances, and its purpose is to prevent appearance defects even when the relative humidity of the atmosphere around the carbon dioxide indicator printed using ink containing a pH indicator is increased. Another object of the present invention is to provide a package with a carbon dioxide gas indicator having an indicating portion showing good carbon dioxide gas response.

According to the present invention, a carbon dioxide provided with a support, and an indicator formed on the support using a carbon dioxide detection ink composition containing a pH indicator, a binder resin, a polyhydric alcohol, and a solvent. A package in which a gas indicator and a carbon dioxide permeable primary container for containing a chemical that generates carbon dioxide gas are disposed in a carbon dioxide and water vapor impermeable exterior body,
The carbon dioxide indicator is disposed between the carbon dioxide permeable primary container and the exterior body,
The polyhydric alcohol has a blending amount of 1 to 3 parts by weight with respect to 100 parts by weight of the carbon dioxide detection ink composition.

  When the present invention is used, the indicator of the carbon dioxide indicator does not change its appearance and color tone even when the relative humidity of the surrounding atmosphere increases, and shows good responsiveness to changes in carbon dioxide concentration.

  The package of the present invention comprises a carbon dioxide and water vapor impermeable exterior body, a carbon dioxide indicator disposed in the exterior body, and a carbon dioxide permeable primary container for containing a chemical generating carbon dioxide gas. The carbon dioxide indicator is disposed between the carbon dioxide permeable primary container and the exterior body. This carbon dioxide gas indicator has a support and an indicator provided on the support. This indicator is formed using a carbon dioxide gas detecting ink composition. The carbon dioxide detection ink composition contains a pH indicator, a binder resin, a polyhydric alcohol, and a solvent. The polyhydric alcohol has a blending amount of 1 with respect to 100 parts by weight of the carbon dioxide detection ink composition. ~ 3 parts by weight.

  The polyhydric alcohol is used as a humectant and can promote a color reaction of the pH indicator by holding a solvent such as water in the ink layer serving as the indicator.

  According to the present invention, by limiting the content of the polyhydric alcohol as described above, excessive water is not taken into the pH indicator even in a humid environment, thereby preventing redissolving of the carbon dioxide indicator ink. The appearance of the carbon dioxide indicator can be maintained well.

  According to the present invention, such a carbon dioxide gas indicator and a carbon dioxide gas permeable primary container for containing a chemical agent that generates carbon dioxide gas, a carbon dioxide gas and water vapor impermeable package enclosing a replacement gas containing carbon dioxide gas By using the package placed in the body, the change in the carbon dioxide concentration in the substituted gas atmosphere can be determined by the color change of the indicator regardless of the change in the humidity of the surrounding atmosphere. The occurrence of pinholes and poor seals can be easily confirmed.

Here, the carbon dioxide permeability of the carbon dioxide-permeable primary container means having a carbon dioxide permeability of 500 cm / m ² · day · atm or more. Further, the carbon dioxide and water vapor impermeable means that it has a 500cm ^/ m 2 · day · atm or less of carbon dioxide gas permeability, and 50cm ^/ m 2 · day · atm or less of water vapor transmission rate. If the carbon dioxide transmission rate exceeds 50 cm / m ² · day · atm, the carbon dioxide atmosphere in the package cannot be maintained, and if the water vapor transmission rate exceeds 50 cm / m ² · day · atm, the humidity in the package will be It depends substantially on the humidity outside the body. Further, when the carbon dioxide gas permeability is 10 cm / m ² · day · atm or less and the water vapor permeability is 10 cm / m ² · day · atm or less, the above-described effects are further improved. As the resin film that can be used in the present invention having these conditions, a transparent vapor-deposited film obtained by vapor-depositing silica or alumina on a base film made of a synthetic resin such as polyethylene terephthalate or nylon, a polyvinylidene chloride film, polyvinyl alcohol Examples include films.

  As the polyhydric alcohol, glycerin, ethylene glycol, propylene glycol, polyethylene glycol and the like can be used. More preferably, glycerin can be used. If the proportion of the polyhydric alcohol is less than 1% by weight, the color development speed of the indicator tends to be insufficient. On the other hand, if the proportion of the polyhydric alcohol exceeds 3% by weight, a poor appearance tends to occur. is there.

Any pH indicator can be used as long as it is accompanied by a change in color tone due to the influence of carbon dioxide gas or a color change caused by a change in pH in accordance with a change in the concentration of an alkaline substance. Table 1 shows preferred pH indicators and their color ranges.

  Particularly preferred pH indicators include metacresol purple and paraxylenol blue due to safety, ease of understanding the change in color reaction, and various resistances.

  Carbon dioxide dissolves in water and exhibits weak acidity. In the ink composition used in the present invention, when carbon dioxide in the ambient atmosphere is sufficiently present, the pH value decreases, but the pH value increases as the carbon dioxide concentration decreases. Changes. By observing this change in color tone, it is possible to detect a change in the carbon dioxide concentration in the surrounding atmosphere. If the composition includes an alkaline substance, a change in color tone can be detected more clearly.

  As the alkaline substance, organic alkalis such as triethanolamine and polyethyleneimine, and inorganic alkalis such as alkali hydroxide, alkali carbonate, alkali hydrogen carbonate, and ammonia can be used. The proportion of the alkaline substance is preferably 5% by weight or less. Even if 5% by weight or more is used, the effect does not change.

  The binder resin is used for fixing a constituent such as a pH indicator on a support, and includes a polyvinyl acetal resin, a polyvinyl alcohol resin, a polyvinyl butyral resin, a polyurethane resin, an acrylic resin, a methacrylic resin, a polyester resin, and A polyether resin etc. are mentioned.

  As the solvent, those capable of uniformly and stably dissolving or dispersing each component of the ink composition of the present invention are selected, and examples thereof include ethers, aromatic hydrocarbons, esters, alcohols, and ketones. It is done. In particular, alcohols are preferable. Further, in order to dissolve a pigment, an alkaline substance or the like to obtain an ink composition and to obtain a good color as an indicator, water is preferably contained.

  Moreover, a water absorbing agent can be mix | blended in an ink composition as needed. Thereby, a solvent such as water can be held in the ink layer serving as the indicator, and the color reaction of the pH indicator can be promoted. As the water-absorbing agent, one that does not show extreme acidity or alkalinity when a solvent such as water is included is selected, such as starch, kaolin, synthetic silica, glass, microcrystalline cellulose, ion-exchange cellulose, and aluminum silicate. Can be used.

The pH indicators shown in Table 1 can be determined not only by the change in color tone of the indicator itself, but also by the change in color tone due to color mixing with other color pigments.

  For such a purpose, a colorant can be added to the carbon dioxide gas detecting ink composition used in the present invention.

  When a colorant is added and mixed with the color of the carbon dioxide gas detection ink composition, for example, when the change in the color tone of the indicator itself is difficult to visually determine, or when the design is not a desired color tone, It can be changed to a color tone that is easy to visually determine, or a color tone that is desired in design.

  For the same purpose, a colored support other than white can be applied, and an indicator section using the carbon dioxide gas detecting ink composition of the present invention can be provided thereon.

  Examples of colorants include edible red No. 2 (Amaranth), edible red No. 3 (erythrosin), edible red No. 40 (Arla Red AC), edible red No. 102 (New Coxin), edible red No. 104 (Phloxine), edible Red No. 106 (Acid Red) and red colorants such as natural cochineal pigments, edible yellow No. 4 (tartrazine), edible yellow No. 5 (Sunset Yellow FCF), and yellow colorants such as natural red safflower yellow Blue colorants such as Food Blue No. 1 (Brilliant Blue FCF) and Food Blue No. 2 (Indigo Carmine) can be mentioned.

  In addition to adding a colorant to the ink composition, the same change in color tone can be obtained by using a colored support.

  In addition, in order to improve the coatability of other inks, various agents such as surfactants, varnishes, compounds, drying inhibitors, and dryers may be added within a range that does not affect the color development of the carbon dioxide detection ink. Is possible.

  As a method for applying the ink to the support, a printing method such as a screen printing method, an intaglio printing method, a gravure printing method, or a coating method such as roll coating, spray coating, or dip coating is preferably used.

  The carbon dioxide indicator used in the present invention is desired to have a relatively large coating amount of the ink composition and to be constant. For this reason, it is preferable to use a printing method as a method for forming the indicator of the carbon dioxide indicator. For example, when a packaging body is processed by continuously printing an indicator on a support, heat sealing, and cutting, gravure printing or flexographic printing is suitable because the support can be wound and supplied.

  As the substrate, a substrate that does not react with the carbon dioxide indicator and does not inhibit the coloration of the reagent is preferable. Examples of such a base material include synthetic resins such as polyester, polyamide, polyvinyl alcohol, cellophane, ethylene vinyl alcohol copolymer, polyethylene, polypropylene, polymethylpentene, and the like, and these synthetic resin films and silica, alumina, etc. A laminated body with a transparent vapor deposition film can be used in accordance with the purpose and usage.

  As a usage form of the package of the present invention, a method of placing a carbon dioxide gas inside a container made of a gas barrier material for storing contents such as food, beverages, and medicines and disposing a carbon dioxide indicator in the container is illustrated. be able to.

  Hereinafter, the packaging body of the present invention will be described in more detail with reference to the drawings.

  FIG. 1 is a front view showing a first example of a carbon dioxide indicator used in the present invention, and FIG. 2 is a sectional view thereof.

  As shown in the figure, this indicator 10 is for detecting carbon dioxide gas comprising, for example, metacresol purple, sodium carbonate, polyvinyl acetal resin, 1 to 3% by weight of glycerin and water on both sides of a support 1 made of, for example, a polyethylene terephthalate film. The indicator part 2 obtained by applying the ink composition by screen printing in a circular pattern, for example, is provided, and the periphery thereof is surrounded by, for example, a porous film 3 having carbon dioxide gas permeability. The indicator part of the indicator is purple in normal air. In FIG. 1 and FIG. 2, the instruction unit 2 is provided on both surfaces of the support 1, but a configuration in which the instruction unit is provided only on one surface can also be applied. Moreover, although this indicator is surrounded by the air permeable film 3, it can be used as it is without using the air permeable film 3.

In FIG. 3, the figure showing the 1st example of the package concerning this invention is shown. As shown in the figure, this gas replacement package 20 includes a carbon dioxide permeable container 11 made of, for example, 0.910 to 0.925 g / cm ³ , which contains a chemical solution, and the carbon dioxide indicator 10. Is enclosed in an exterior body 12 made of a gas barrier laminate film using a mixed gas 13 of 90 to 99.5% by volume of nitrogen and 0.5 to 10% by volume of carbon dioxide as a replacement gas.

  The indicator indicating section 2 in the package is yellow when enclosed. However, if pinholes or poor seals occur in the package and the replacement gas leaks out and the surrounding air is mixed in instead, the carbon dioxide concentration in the package decreases. For this reason, the gas atmosphere around the indicator 10 changes, and the color tone of the indicator 2 changes from yellow to light brown or even purple according to pH. By visually recognizing the change in color tone, it can be easily confirmed whether or not the atmosphere containing carbon dioxide in the package is maintained at a predetermined concentration.

  In FIG. 4, the 2nd example of the package concerning this invention is shown.

As shown in the figure, the package 30 has a carbon dioxide gas-permeable low-density polyethylene container 14 containing, for example, 0.910 to 0.925 g / cm ³ , and the outer portion of the container 14 as a support. As an indicator composition 2 formed by screen printing using the same carbon dioxide gas detection ink composition as in the first example of the carbon dioxide indicator, and a coating layer made of a breathable material coated on the indicator 2 5 is used, and a package 12 made of a gas barrier laminate film is used by using a mixed gas 13 of 90 to 99.5% by volume of nitrogen and 0.5 to 10% by volume of carbon dioxide as a replacement gas. It has the structure enclosed with. Moreover, it can also be set as the package which has the structure similar to the package 30 except not providing the coating layer 5. FIG.

  In this packaging body 30 as well, as in the packaging body shown in FIG. 3, by visually confirming the change in color tone, it is easily confirmed whether or not the gas atmosphere containing carbon dioxide gas in the packaging body is maintained at a predetermined concentration. be able to.

  In FIG. 5, the 3rd example of the package concerning this invention is shown.

  In addition to the package shown in FIGS. 3 and 4, the indicator 2 is printed on the inner surface of the exterior body 12 as shown in FIG. 5, or the carbon dioxide indicator 10 including the support 1 provided with the indicator 2 is provided in the exterior body. 12 may be used in an integrated manner with the packaging body, for example, by adhering to 12.

  The packaging body 40 includes an exterior body 12 made of a gas barrier laminated film, an inner surface of the exterior body 12, and the exterior body 12 as a support, for example, carbon dioxide gas detection ink composition screen printing similar to the carbon dioxide indicator 10. The carbon dioxide gas indicator which has the instruction | indication part 2 provided by these is comprised. For example, the packaging body 40 is formed by arranging two laminated films with the indicating unit 2 inside, and placing the content 16 therebetween, then 90 to 99.5% by volume of nitrogen, 0.5 to 10 volumes of carbon dioxide gas It can be formed by hermetically sealing the periphery of the outer package 12 by heat sealing while replacing with the% mixed gas 13.

  FIG. 6 shows a fourth example of the package according to the present invention.

  FIG. 7 shows a schematic diagram of an example of a cross-sectional configuration taken along the line AA of FIG.

  As shown in FIG. 7, the indicator 2 can be printed on the exterior body 12 so that the carbon dioxide indicator can be integrated with the exterior body.

  The package 50 is made of, for example, a carbon dioxide gas detection ink composition similar to that of the carbon dioxide indicator 10 on the exterior body 12 made of a gas barrier laminated film, and on the inner surface of the exterior body 12 with the exterior body 12 as a support. And a carbon dioxide indicator having an instruction unit 2 provided by screen printing.

  Further, instead of the AA cross-sectional configuration shown in FIG. 7, another example of the A′-A ′ cross-sectional configuration shown in FIG. 8 can be applied. At this time, the package 50 uses the outer package 12 made of a gas barrier laminated film as a support, and an anchor coat layer 51 formed on the outer package 12 and the anchor coat layer 51, for example, like the carbon dioxide indicator 10 And an overcoat layer 52 formed on the anchor coat layer 51 via the indicator 2 using the carbon dioxide gas detecting ink composition.

  By providing such an anchor coat layer and overcoat layer, the carbon dioxide indicator layer can be protected and appearance defects, peeling, and breakage can be prevented.

  The anchor coat layer is a water-insoluble material that has good adhesion between the substrate and the carbon dioxide indicator layer formed thereon, and the overcoat layer is carbon dioxide permeable, a carbon dioxide indicator. A material having good adhesion to the layer and optionally good adhesion to the adhesive layer or other resin layer that can be further provided on the carbon dioxide indicator layer can be preferably used. Two or more anchor coat layers and / or overcoat layers may be provided as necessary.

  As a method for applying the anchor coat layer and the overcoat layer, a printing method such as a screen printing method, an intaglio printing method, a gravure printing method, or a coating method such as roll coating, spray coating, or dip coating is preferably used. .

  Further, a sealant layer can be provided on the indicator portion 2 of the carbonic acid indicator having the cross-sectional configuration of FIG. 7 or the overcoat layer of the carbonic acid indicator having the cross-sectional configuration of FIG.

  For example, after forming a carbon dioxide indicator having the configuration shown in FIG. 8 on the exterior body, and optionally a printed layer, an adhesive layer is formed on the exterior body 12 via the overcoat layer and the printed layer, A sealant layer can be provided on the adhesive layer.

  As the sealant layer, a layer having carbon dioxide gas permeability and water vapor permeability, such as polyethylene and polypropylene, can be appropriately selected.

  As the adhesive layer, for example, a two-component curable urethane resin can be used.

  In FIG. 6, the carbon dioxide indicator is formed as a part of the exterior body, but in the cross-sectional configuration of FIGS. 7 and 8, the support body 1 of FIG. 1 is applied instead of the exterior body 12. It is also possible to form a single carbon dioxide indicator.

  The material of the carbon dioxide gas permeable primary container that contains the contents can be appropriately selected from polyethylene, polypropylene, polyvinyl chloride, polyethylene vinyl acetate, etc., a laminate, or a combination of each material. The sheath shape is determined by the content type and capacity. The content volume is 20 ml to 3 l and the thickness is about 100 μm to 500 μm. Here, this applies to soft bags and blow bottles with a capacity of 100 ml or more and a thickness of 300 μm or less. To do.

  The content is not particularly limited as long as it contains a bicarbonate-containing chemical solution and other carbon dioxide gas that is released to the atmosphere, and quality deterioration associated therewith is recognized.

  Hereinafter, the present invention will be specifically described with reference to examples.

Example 1
(CO2 indicator layer composition)
Metacresol purple 1 part by weight Sodium hydroxide 4 parts by weight glycerin 2.5 parts by weight polyvinyl acetal resin 7 parts by weight (anchor coat layer, overcoat layer composition)
Barium sulfate: 10 parts by weight Urethane resin: 15 parts by weight A polyester film having a thickness of 12 μm was prepared.

  A 0.5 μm thick anchor coat layer, a 1 μm thick carbon dioxide indicator indicating layer, and a 1 μm thick overcoat layer were sequentially laminated on one side by gravure printing, and the thickness on which the silica was deposited on the opposite side A polyester film having a thickness of 12 μm was laminated with a two-component curable urethane adhesive, and a polyethylene film having a thickness of 50 μm was laminated so as to cover the printed surface, thereby obtaining an outer package.

  After making a bag using this laminated film and putting a polyethylene ampule (thickness 500 μm) filled with 20 ml of a 7% sodium hydrogen carbonate aqueous solution and a small hygrometer as the contents, the inside is 1/1 = nitrogen / carbonic acid. A package was obtained by replacing with a gas mixture gas.

  In addition, the humidity around the ampoule was measured with a small hygrometer.

High-temperature and high-humidity environment test at 40 ° C. and 75% RH The package was stored in a constant-temperature and humidity chamber at 40 ° C. and 75% RH for 1 week, and then the appearance of the indicating layer was confirmed. The case where ink redissolved was observed was evaluated as x, and the case where ink redissolved was not observed was evaluated as o.

  Then, the responsiveness of the indicator was confirmed by opening the package.

  The case where the indicator changed color within 2 days was evaluated as ◯, and the case where the indicator did not change was evaluated as ×.

  The obtained results are shown in Table 2 below.

Example 2
A package was obtained in the same manner as in Example 1 except that a polyethylene bag (thickness: 200 μm) filled with 250 ml of a 7% aqueous sodium hydrogen carbonate solution was used as the contents.

  A high temperature and high humidity environment test at 40 ° C. and 75% RH was conducted in the same manner as in Example 1. The obtained results are shown in Table 2 below.

Example 3
A package was obtained in the same manner as in Example 2 except that the amount of glycerin in the carbon dioxide indicator layer composition was changed to 1 part by weight.

  A high temperature and high humidity environment test at 40 ° C. and 75% RH was conducted in the same manner as in Example 1. The obtained results are shown in Table 2 below.

Example 4
A package was obtained in the same manner as in Example 2 except that the amount of glycerin in the carbon dioxide indicator layer composition was changed to 3 parts by weight.

  A high temperature and high humidity environment test at 40 ° C. and 75% RH was conducted in the same manner as in Example 1. The obtained results are shown in Table 2 below.

Comparative Example 1
A package was obtained in the same manner as in Example 1 except that the amount of glycerin in the carbon dioxide indicator layer composition was changed to 5 parts by weight.

Comparative Example 2
A package was obtained in the same manner as in Example 2 except that the amount of glycerin in the carbon dioxide indicator layer composition was changed to 5 parts by weight.

Comparative Example 3
A package was obtained in the same manner as in Example 2 except that the amount of glycerin in the carbon dioxide indicator layer composition was changed to 0 parts by weight.

From Table 2, the appearance of the indicators having low glycerin concentrations in Examples 1 to 4 was good regardless of the humidity inside the exterior. On the other hand, regarding the indicators with high glycerin concentration in Comparative Examples 1 and 2, poor appearance occurred when the film thickness of the primary container was thin and the humidity inside the exterior was high. Moreover, when glycerin was not added, the response of the indicator after the storage test was poor.

  From the above, it was found that poor appearance can be avoided while maintaining the responsiveness of the carbon dioxide indicator by setting the glycerol concentration as low as 1 to 3 parts by weight.

The front view showing the 1st example of the carbon dioxide indicator used for the present invention Partial sectional view of FIG. The figure showing the 1st example of the package concerning this invention The figure which shows the 2nd example of the package concerning this invention The figure which shows the 3rd example of the package concerning this invention The figure which shows the 4th example of the package concerning this invention Partial sectional view of FIG. Partial sectional view of FIG.

Explanation of symbols

    DESCRIPTION OF SYMBOLS 1 ... Support body, 2 ... Instruction | indication part, 3 ... Carbon dioxide gas permeable film, 5 ... Coating layer, 10, 18 ... Carbon dioxide gas indicator, 11, 14, 16 ... Chemical solution container, 12 ... Exterior body, 13 ... Carbon dioxide gas Contained gas, 20, 30, 40, 50 ... package, 51 ... anchor coat layer, 52 ... overcoat layer

Claims (5)

A carbon dioxide gas indicator comprising a support and an indicator formed on the support using a carbon dioxide gas detecting ink composition containing a pH indicator, a binder resin, a polyhydric alcohol, and a solvent; and carbon dioxide gas. A carbon dioxide permeable primary container for containing a medicine that generates a carbon dioxide gas and water vapor impermeable outer package,
The carbon dioxide indicator is disposed between the carbon dioxide permeable primary container and the carbon dioxide and water vapor impermeable exterior body,
The said polyhydric alcohol is the packaging body characterized by the compounding quantity being 1-3 weight part with respect to 100 weight part of said carbon dioxide detection ink compositions.   The packaging body according to claim 1, wherein a space portion between the carbon dioxide permeable primary container and the carbon dioxide and water vapor impermeable exterior body is a carbon dioxide atmosphere.   The relative humidity of the space portion between the carbon dioxide permeable primary container and the carbon dioxide and water vapor impermeable exterior body is 60% to 100% in a storage environment of 25 ° C. and 50% RH. The package according to claim 1 or 2.   The packaging body according to any one of claims 1 to 3, wherein the exterior body is applied as the support body, and the indication portion is formed on at least a part of the inner surface of the exterior body.   2. The apparatus according to claim 1, further comprising at least one of an anchor coat layer provided between the support and the indicator and an overcoat layer provided so as to cover the indicator. 5. The package according to any one of 4 above.

Images