Container and method for manufacturing the same

Abstract

To provide a container that is subjected to heat treatment but exhibits an improved ability of removing remaining oxygen inside the sealed space of a discharge part, thereby enabling an enhanced antioxidation function for a stored object subjected to the heat treatment after storage, and a manufacturing method therefor.SOLUTION: A container 10 includes: a first chamber 11 and a second chamber 12, formed and sealed by a container wall exhibiting a gas barrier property; a partition part 13 for partitioning between the first chamber 11 and the second chamber 12; and a three-dimensionally shaped, fluid-tightly closed discharge part 14, that is provided at the partition part 13 so as to communicate between the chambers 11, 12. With the first chamber 11 storing a stored object containing water, the container 10 is subjected to heat treatment. A deoxidant containing iron is arranged inside at least the second chamber 12, and the deoxidant removes oxygen inside the second chamber 12 using a water vapor from the stored object passing through the discharge part 14.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a container and a method for manufacturing the same.

Background Art

[0002] Conventionally, in containers that require a discharge part, it has been known that even if the storage part of the stored material is covered with a gas barrier film, the stored material deteriorates due to oxygen that has penetrated through the discharge part from outside the container. In particular, in containers that store stored materials with low fluidity, the stored materials near the discharge part were intensively deteriorated by oxygen. Therefore, containers have been proposed that prevent the stored material from being oxidized by oxygen that penetrates from the discharge part by covering not only the storage part but also the discharge part with a gas barrier film. For example, in Patent Document 1 below, a packaging bag has been proposed in which a sealed chamber and a storage chamber are partitioned by a partition part, and a pouring tool for pouring food in the storage chamber is heat-sealed to the partition part. In this packaging bag, the whole is formed from a gas barrier laminated film, and not only the food in the storage chamber but also the pouring tool in the sealed chamber is covered with a gas barrier laminated film. Thereby, oxygen outside the packaging bag is prevented from penetrating through the pouring tool and entering the storage chamber, and the food in the storage chamber is prevented from being oxidized and deteriorated. Further, this document describes that in order to improve the shielding property and prevent leakage of food from the pouring outlet during heat sterilization, a plug body is integrally formed on the pouring tool body to seal the pouring hole, and further, the pouring hole is closed with a separate plug body and an inner seal material such as an aluminum foil is attached to the opening of the pouring hole as a modification.

[0003] In Patent Document 2 below, in order to give the mouthplug part of a pouch with a mouthplug gas barrier properties, a pouch with a mouthplug has been proposed in which the mouthplug part is covered with a gas barrier film or the mouthplug part and an oxygen absorber are covered with a gas barrier film together. In this pouch with a mouthplug, by giving the mouthplug part gas barrier properties and improving the shielding property, oxygen outside the pouch with a mouthplug is prevented from penetrating through the mouthplug part and entering the inside, and the content is prevented from deteriorating.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-130153 [Patent Document 2] Japanese Patent Publication No. 2003-95288 [Overview of the Initiative] The problem the invention aims to solve

[0005] However, even though the discharge port was airtightly covered with a gas barrier material to prevent oxygen from entering from the outside, it was not possible to prevent residual oxygen in the space covered by the gas barrier material from permeating through the discharge port and entering the containment chamber. As described in the modified version of Patent Document 1 above, if an aluminum foil inner seal material is provided at the discharge port, it is possible to not only prevent leakage of the contents but also improve the gas barrier properties of the containment chamber. However, this has the problem of complicating the structure of the discharge part, which requires extra effort during manufacturing and use. Furthermore, as described in Patent Document 2 above, when the oxygen absorber is covered with a gas barrier film along with the discharge section to improve the shielding of the discharge section, it is possible that the antioxidant effect will be insufficient when used as a container for heat treatment of contents, and there was a problem that it was not easy to improve the antioxidant effect.

[0006] Therefore, the present invention aims to provide a container that can improve the ability to remove residual oxygen in the sealed space around the discharge port, even in a container that is subjected to heat treatment, and that can improve the oxidation prevention function of the contents that are heat-treated after being contained. [Means for solving the problem]

[0007] The inventors of this invention diligently conducted research to solve the above problems and discovered that when using an iron-based oxygen absorber that is less prone to deterioration during heat treatment, moisture is always necessary for the oxygen absorber to exert its deoxygenation effect. In order to completely remove oxygen in the space in which the oxygen absorber is placed, even at a relative humidity of 100%, the amount of moisture in the deoxygenation reaction is insufficient, causing the deoxygenation reaction to stop. As a result, the oxygen remaining in the space sealed around the discharge port cannot be removed, and the oxidation of the contents by the oxygen that permeates through the discharge port progresses. Based on these findings, the inventors arrived at the present invention.

[0008] The container of the present invention comprises a first chamber and a second chamber formed by sealing with a gas barrier container wall, a partition separating the first chamber and the second chamber, and a liquid-tight seal provided in the partition so as to connect the two chambers. Permeable to water vapor and oxygen A container having a three-dimensional discharge section, wherein a contents containing water is contained in the first chamber and subjected to heat treatment, The pair of laminated sheets constituting the container wall are stacked facing each other, the innermost layers are welded together at their peripheries, and the welding is carried out at an intermediate position so as to cross the periphery, thereby forming the first chamber and the second chamber separated by the partition portion on which the discharge portion is provided. At least the second chamber is provided with an iron-containing oxygen absorber, and the oxygen absorber is The device has the function of removing oxygen from the second chamber by allowing the water vapor from the contents of the first chamber to pass through the discharge section provided in the partition to the second chamber, thereby preventing the oxygen from the second chamber from passing through the discharge section and entering the first chamber, and preventing oxidation of the contents of the first chamber. .

[0009] According to the container of the present invention, a first chamber and a second chamber are sealed and formed by a partition between the gas barrier walls, and a discharge port is provided in the partition while the partition is liquid-tightly closed. The contents are stored in the first chamber, and an oxygen absorber is placed in at least the second chamber, so that the oxygen in the second chamber can be removed by the oxygen absorber.

[0010] In particular, the container holds water-containing material in the first chamber, and an iron-containing oxygen absorber is placed in the second chamber, with the discharge section configured to allow sufficient permeability of water vapor from the material. As a result, when the container is placed in the first chamber and both the first and second chambers are sealed and then heat-treated, the oxygen absorber does not deteriorate due to the heat, and furthermore, during and after the heat treatment, the iron-based oxygen absorber can sufficiently remove oxygen from the second chamber using water vapor from the material. Therefore, the oxidation prevention function of the material in the first chamber can be improved.

[0011] Furthermore, since no special structure is required to enhance the shielding of the discharge section itself, and a structure that can simply be sealed liquid-tight is sufficient, the structure of the discharge section can be simplified. Therefore, according to the present invention, it is possible to provide a container that can improve the ability to remove residual oxygen in the sealed space around the discharge port, even in a container that is subjected to heat treatment, and that can improve the oxidation prevention function of the contents that are heat-treated after being contained.

[0012] In the container of the present invention, the amount of moisture in the second chamber may be less than the amount of moisture required for the oxidation reaction of the oxygen absorber corresponding to the amount of oxygen in the second chamber, and there is no need to pre-fill the second chamber with water. Even under such conditions, the iron-based oxygen absorber can significantly improve its ability to remove oxygen from the second chamber by utilizing the water vapor from the contents.

[0013] Furthermore, in the container of the present invention, the oxygen-absorbing member containing the oxygen-absorbing agent may be housed in the second chamber, or the oxygen-absorbing agent may be contained in the container wall. Furthermore, the present invention may also include a spout body having a through hole that allows the first chamber and the second chamber to communicate, and a removable cap that closes the through hole on the second chamber side.

[0014] In this way, the amount of water vapor permeation can be appropriately set by adjusting the dimensions and materials of the spout body, the section with the through-hole, and the cap that closes the through-hole, thereby ensuring sufficient permeability of water vapor from the contents at the discharge section.

[0015] In the method for manufacturing a container of the present invention, a first chamber and a second chamber are formed by a container wall having gas barrier properties, a partition is provided in the partition so as to connect the first chamber side and the second chamber side, and is liquid-tightly sealed. Permeable to water vapor and oxygen A method for manufacturing a container having a three-dimensional discharge section, wherein a container containing a water-containing substance is placed in the first chamber and subjected to heat treatment, The pair of laminated sheets constituting the container wall are stacked facing each other, the innermost layers are welded together at their periphery, and the welding is carried out at an intermediate position so as to cross the periphery, thereby forming the first chamber and the second chamber by the partition portion on which the discharge portion is provided.The container is filled with the contents in the first chamber and sealed, and after disposing an oxygen scavenger containing iron in at least the second chamber and sealing it, the heat treatment is performed. During or after the heat treatment, Through the discharge section provided in the partition, the water vapor from the contents of the first chamber permeates into the second chamber, removing the oxygen in the second chamber through the oxidation reaction of the oxygen absorber, preventing the oxygen from the second chamber from permeating through the discharge section and entering the first chamber, thereby preventing oxidation of the contents of the first chamber. it is characterized by the above.

[0016] According to the method for manufacturing a container of the present invention, a first chamber and a second chamber are formed via a partition portion by a container wall having gas barrier properties, and a container provided in the partition portion with a discharge portion capable of communicating between both chambers being closed is used. The first chamber is filled with a content containing water and sealed, and at least an oxygen scavenger containing iron is disposed in the second chamber and sealed, and then heat treatment is performed. Therefore, the oxygen scavenger does not deteriorate during the heat treatment, and during and after the heat treatment, the iron-based oxygen scavenger can utilize water vapor from the content to improve the ability to remove oxygen in the second chamber. Therefore, it is possible to provide a method for manufacturing a container as described above that can improve the ability to remove oxygen remaining in the space where the discharge portion is sealed and improve the oxidation prevention function of the content that is heat-treated after storage.

Brief Description of the Drawings

[0017] [Figure 1] It is a front view of a container according to a first embodiment of the present invention. [Figure 2] It is a longitudinal sectional view of a discharge portion of a container according to a first embodiment of the present invention. [Figure 3] It is a longitudinal sectional view of a first chamber of a container according to a first embodiment of the present invention. [Figure 4] (a) to (c) are diagrams for explaining a method of using a container according to a first embodiment of the present invention. [Figure 5] It is a front view of a container according to a second embodiment of the present invention. [Figure 6] It is a longitudinal sectional view of a discharge portion showing modified examples of the first and second embodiments. [Figure 7] It is a graph showing the change over time in the amount of oxygen in the second chamber of the containers of Example 1 and Comparative Example 1 of the present invention. [Figure 8]This graph shows the change in the amount of oxygen in the second chamber of the container in Example 2 and Comparative Example 2 of the present invention over time. [Modes for carrying out the invention]

[0018] Embodiments of the present invention will be described in detail below with reference to the figures. [First Embodiment] The container of the first embodiment is a container that contains a liquid or semi-solid substance, including water, and is subjected to heat treatment. As shown in Figure 1, the container 10 has a first chamber 11 and a second chamber 12 formed by sealing with a gas barrier container wall, a partition 13 separating the first chamber 11 and the second chamber 12, and a three-dimensional discharge section 14 provided on the partition 13 to connect the two chambers 11 and 12 and sealed to a liquid-tight seal. The first chamber 11 contains a contents containing water, and the second chamber 12 contains an oxygen-absorbing member 15 containing an iron-containing oxygen absorber. Because the discharge section 14 has a three-dimensional shape, the inside of the second chamber 12 has a three-dimensional shape with a volume capable of accommodating the discharge section 14, as shown in Figure 3.

[0019] The container wall may be made of a sheet of flexible resin, for example, and may be a laminated sheet with a gas barrier layer such as an aluminum vapor-deposited layer. The innermost layer is made of a resin that can stably accommodate the contents and can be welded together when facing each other. The sheet material constituting the container wall is welded together at the periphery of the innermost layers and also welded across the periphery at an intermediate position, thereby forming the first chamber 11 and the second chamber 12 separated by the partition 13.

[0020] As shown in Figure 2, the partition section 13 is provided with a discharge section 14 that connects the first chamber 11 and the second chamber 12 and is sealed in a liquid-tight manner. The discharge section 14 includes a spout body 16 having a through hole 16a that allows the first chamber 11 and the second chamber 12 to communicate, and a removable cap 17 that closes the through hole 16a on the second chamber 12 side.

[0021] The spout body 16 comprises a boat-shaped section 16b fixed liquid-tightly to the container wall of the partition section 13, and a protruding section 16c that cylindrically projects from the boat-shaped section 16b toward the second chamber 12, with a through hole 16a provided so as to penetrate the boat-shaped section 16b and the protruding section 16c. The outer circumference of the protruding section 16c is provided with a locking structure for securing the cap 17 or the tube during use. The spout body 16 in this embodiment may also be a female-shaped spout conforming to ISO 80369-3, which can be connected to an ISO standard tube.

[0022] The spout body 16 is made of a molded body integrally formed from a resin that can be welded to the innermost layer of the container wall. The resin constituting the spout body 16 may be a molded body made of, for example, polyethylene or polypropylene.

[0023] The surface of the spout body 16 on the first chamber 11 side and the surface on the second chamber side are not covered with a material that reduces water vapor permeability, and the constituent resin of the spout body 16 is left exposed. Furthermore, the through-hole 16a is provided with both ends open, and neither the end on the second chamber 12 side, which is closed by the cap 17, nor the end on the first chamber 11 side, is provided with a sealing portion such as a film of resin or metal that would reduce the permeability of water vapor.

[0024] The cap 17 is detachably secured to the outer circumference of the protruding portion 16c of the spout body 16, and the top wall 17a tightly seals the opening at the end of the through hole 16a of the spout body 16 on the second chamber 12 side, creating a liquid-tight seal, while the cylindrical wall 17b covers the outer circumference of the protruding portion 16c. The through hole 16a of the protruding portion 16c of the spout body 16 is closed only by the cap 17. The cylindrical wall 17b of the cap 17 in this embodiment has a structure that can engage with a female-shaped spout in accordance with ISO 80369-3. The cap 17 is preferably molded from a resin, and may be a molded body made of a resin such as polyethylene or polypropylene.

[0025] The oxygen-absorbing member 15 is a member containing an oxygen absorber in a bag-shaped container made of a breathable material, and is housed in the second chamber 12 as shown in Figures 1 and 3. The bag-shaped container is made of a material that can be used in the environment during heat treatment. The oxygen absorber consists of an iron-based oxygen absorber whose main component is iron, and it removes oxygen using the surrounding moisture. The deoxygenation reaction in the iron-based oxygen absorber is shown by the following equations (1) and (2), and the overall reaction is shown by equation (3). [ka]

[0026] Because the second chamber 12 has a three-dimensional shape corresponding to the size of the discharge section 14, the inside of the second chamber 12 has a volume corresponding to the discharge section 14, and air corresponding to that volume is contained together with the discharge section 14. Moreover, the second chamber 12 is formed by sealing with a gas barrier container wall. Therefore, oxygen corresponding to the volume is present inside the second chamber 12. The deoxygenation member 15 contains and is equipped with a deoxygenating agent that has sufficient capacity to remove oxygen present in the second chamber 12.

[0027] On the other hand, while water is essential for removing oxygen with an oxygen absorber, as shown in equation (3), in the container 10 of this embodiment, even if the air in the second chamber 12 has a relative humidity of 100%, the amount of moisture in the second chamber 12 is less than the amount of moisture required for the oxidation reaction of the oxygen absorber corresponding to the amount of oxygen in the second chamber 12. Therefore, in this embodiment, by actively allowing the water vapor from the contents in the first chamber 11 to permeate through the discharge section 14 and supply it to the second chamber 12, the oxygen absorber of the deoxidizing member 15 can utilize the water vapor from the contents to improve the oxygen removal capacity in the second chamber 12.

[0028] Next, a method for manufacturing such a container 10 will be described. First, an empty container is prepared using a container wall with gas barrier properties, which has a first chamber 11 and a second chamber 12, a partition 13 separating the first chamber 11 and the second chamber 12, and a discharge section 14 that is arranged in the partition 13 so as to allow communication between the first chamber 11 side and the second chamber 12 side and is sealed in a liquid-tight manner. An empty container can be manufactured by various methods. For example, a pair of laminated sheets forming the container wall may be stacked facing each other, a molded body that will become the discharge section 14 may be placed between the laminated sheets, and the partition section 13 and the periphery may be welded. In this case, the through hole 16a of the discharge section 14 may be closed in advance with a cap 17, and at least a portion of the periphery of the first chamber 11 and the second chamber 12 may be manufactured in an open state.

[0029] An empty container is used, and a water-containing material is placed in the first chamber 11, and the periphery is welded to seal the first chamber 11. An oxygen-absorbing member 15 containing an iron-based oxygen absorber is placed in the second chamber 12, and the periphery is welded to seal the second chamber 12. The material placed in the first chamber 11 is not particularly limited as long as it contains enough water to generate sufficient steam; for example, it may be a liquid or semi-solid substance.

[0030] Subsequently, the container 10 containing the contents and the deoxygenation member 15 is subjected to heat treatment. The heat treatment is not particularly limited, but may include, for example, retort processing. During or after the heat treatment, steam is generated from the contents and supplied to the second chamber 12 through the discharge section 14. This steam is then used in the oxidation reaction of the oxygen absorber, improving the oxygen removal capacity in the second chamber 12, thereby manufacturing the container 10 of this embodiment.

[0031] To use such a container 10, first, as shown in Figure 4(a), the second chamber 12 is opened by rupturing the container wall across the second chamber 12 side, and as shown in Figure 4(b), the upper part of the discharge section 14 is exposed. As shown in Figure 4(c), remove the cap 17 and connect the ISO standard tube 21. The contents of the first chamber 11 can be used by discharging them through the tube 21 via the discharge port 14.

[0032] According to the container 10 of this embodiment as described above, the first chamber 11 and the second chamber 12 are sealed and formed via a partition 13 by a container wall having gas barrier properties, and the discharge part 14 is provided on the partition 13 in a closed state. The contents are stored in the first chamber 11, and an oxygen absorber is present in the second chamber 12, so the oxygen remaining in the second chamber 12 can be removed by the oxygen absorber.

[0033] In particular, since the contents containing water are contained in the first chamber 11, the oxygen absorber containing iron is placed in the second chamber 12, and the discharge section 14 is configured to allow sufficient permeability of water vapor from the contents, when the contents are contained in the first chamber 11 and the first chamber 11 and the second chamber 12 are sealed and then heat-treated, the oxygen absorber does not deteriorate due to the heat, and the oxygen absorber can remove oxygen in the second chamber 12 by the water vapor from the contents supplied to the second chamber 12 through the discharge section 14 from the first chamber 11.

[0034] Even if the amount of moisture in the second chamber 12 is less than the required amount of moisture for the oxidation reaction of the oxygen scavenger corresponding to the amount of oxygen in the second chamber 12, the discharge section 14 can sufficiently permeate and supply water vapor from the contents during and after the heat treatment, so that the iron-based oxygen scavenger can utilize this water vapor from the contents to improve the oxygen removal capacity in the second chamber 12. Even if the relative humidity of the air contained in the second chamber 12 is 100% at room temperature, the amount of moisture is insufficient to remove all the oxygen present in that air. Therefore, by using water vapor from the contents to remove oxygen from the second chamber 12, the oxygen removal capacity can be reliably improved. Therefore, even in containers that undergo heat treatment, the ability to remove residual oxygen in the space of the second chamber 12, which seals the discharge section 14, can be improved. This prevents residual oxygen in the second chamber 12 from permeating through the discharge section 14 and entering the first chamber 11, thereby preventing oxidation of the contents in the first chamber 11 and improving the oxidation prevention function of the contents. Furthermore, since water vapor from the contents is supplied to the second chamber 12 by permeating through the discharge section 14, there is no need to pre-store water in the second chamber 12, ensuring hygiene, and the humidity of the air inside the second chamber 12 is not a concern, so the second chamber 12 can be sealed under any environmental conditions.

[0035] Furthermore, there is no need for any special structure to enhance the shielding of the dispensing section 14 itself, such as sealing the through-hole 16a of the dispensing section 14 with a breakable resin film or aluminum laminate, or sealing it with a strong stopper. A structure that simply seals the through-hole 16a liquid-tight with the cap 17 is sufficient, thus simplifying the structure of the dispensing section 14. As a result, the container 10 can be easily manufactured and opened easily during use, making it very user-friendly.

[0036] The container 10 of this embodiment has a spout body 16 having a through hole 16a that allows the first chamber 11 and the second chamber 12 to communicate, and a removable cap 17 that closes the through hole 16a on the second chamber 12 side. Therefore, by appropriately setting the permeability of water vapor by the material, size, shape, thickness, etc. of the spout body 16, protrusion 16c, through hole 16a, cap 17, etc., sufficient permeability of water vapor from the contents in the discharge part 14 can be ensured.

[0037] Furthermore, with the cap 17 attached, it is possible to prevent the contents of the first chamber 11 from flowing into the second chamber 12, and by removing the cap 17, the contents of the first chamber 11 can be easily discharged from the discharge section 14, making it easy to use.

[0038] Furthermore, in the container 10 of this embodiment, the oxygen absorber is housed in the second chamber 12 as an oxygen absorber member 15. Therefore, since it is sufficient to seal the first chamber 11 and the second chamber 12 by forming the container wall with a material that has high gas barrier properties, there are advantages such as increased freedom in the selection of container wall material and the structure of the container.

[0039] On the other hand, according to the manufacturing method of this embodiment, the container 10 described above is manufactured by placing a water-containing substance in the first chamber 11 and sealing it, and then placing an iron-containing oxygen absorber in the second chamber 12, sealing it, and then heat-treating it.

[0040] In this method, the oxygen absorber does not deteriorate due to heat during the heat treatment, and during and after the heat treatment, the iron-based oxygen absorber can improve its ability to remove oxygen from the second chamber 12 by utilizing the water vapor from the contents. As a result, it is possible to manufacture a container 10 that can improve the ability to remove residual oxygen in the space sealed around the discharge section 14, thereby improving the oxidation prevention function of the contents that will be heat-treated after being placed inside.

[0041] [Second Embodiment] Figure 5 shows the container 10 of the second embodiment. In the container 10 of the second embodiment, instead of housing the deoxygenation member 15 in the second chamber 12 as in the first embodiment, an iron-based deoxygenator is contained in the container wall. This container wall may be arranged such that the deoxygenator layer is located inside a gas barrier layer such as PET, nylon, or aluminum, and adjacent to the outside of an oxygen-permeable layer such as CPP (unoriented polypropylene) that constitutes the inner wall surface of the second chamber 12. Other aspects are the same as in the first embodiment.

[0042] Even when the oxygen absorber is placed in the second chamber 12 in this manner, it is possible to obtain the same effects and advantages as in the first embodiment. Furthermore, if the oxygen absorber is contained in the container wall, there is no need to house a separate component such as the oxygen absorber member 15 in the second chamber 12, thus reducing the number of parts in the container and simplifying manufacturing.

[0043] The above embodiments can be modified as appropriate within the scope of the present invention. For example, in each of the above embodiments, an example was described in which the cap 17 is removed and the tube 21 is connected to the discharge port 14 to discharge the contents, but this is not particularly limited, and the contents may be discharged directly from the discharge port. Furthermore, in each of the above embodiments, a female-shaped spout conforming to ISO 80369-3 was used as the spout body, but as shown in Figure 6, a spout with a threaded shape for fitting a conversion connector that can be connected to ISO standard tubes, syringes, etc. may also be used. [Examples]

[0044] The following describes embodiments of the present invention. [Example 1] A container 10 of the first embodiment shown in Figures 1 to 3 was manufactured. The container wall is made of a gas-impermeable film, and the discharge section 14 and cap 17 are made of polypropylene. The first chamber 11 was sealed with Lacol NF enteral semi-solid preparation (manufactured by EN Otsuka Pharmaceutical Co., Ltd., trademark) as the contents, and the second chamber 12 was sealed with air contained together with the oxygen-absorbing member 15. The sealed volume of the second chamber 12 (excluding the dispensing part 14) was 15 ml. As the oxygen-absorbing component 15, one containing an iron-based oxygen absorber ("Ageless FX-50PAN", manufactured by Mitsubishi Gas Chemical Co., Ltd., trademark) was used. The product underwent retort processing as a heat treatment.

[0045] If 15 ml of air is contained in the second chamber 12, and the oxygen concentration is 21%, then the amount of oxygen contained in the second chamber 12 is 1.4 × 10⁻¹⁰. -4 (mol) The required amount of water to remove this oxygen with an oxygen scavenger is twice that amount, 2.8 × 10⁻⁶. -4 It is (mol). On the other hand, assuming a relative humidity of 100%, the amount of moisture in the second chamber 12 is 17.3 g / m³ of absolute humidity at 20°C. 3 Therefore, 1.4 × 10 -5 It is (mol). Therefore, the amount of water in the second chamber 12 is less than the required amount of water to remove the oxygen present in the second chamber 12.

[0046] Multiple containers containing the contents were prepared by actually placing the contents and the oxygen-absorbing member 15 into the container of Example 1, subjected to retort heat treatment, and stored for 3 months under storage conditions of room temperature 40°C and humidity 75%. The oxygen level in chamber 2, section 12, was measured over a period of three months prior to the heat treatment. The results are shown in Table 1 and Figure 7. For ease of understanding, the oxygen content before retort heating is also shown in the figure.

[0047] [Table 1]

[0048] [Example 2] A container 10 of the second embodiment shown in Figure 5 was manufactured. In the second embodiment, an oxygen-absorbing film containing an oxygen absorber ("Ageless Omac," manufactured by Mitsubishi Gas Chemical Co., Ltd., trademark) was used as the container wall, and the oxygen-absorbing member 15 was not placed in the second chamber 12. Except for these two modifications, the containers 10 containing multiple contents of Example 2 were prepared in the same manner as in Example 1, and then retorted and stored for three months in the same manner as in Example 1. Table 1 and Figure 8 show the changes in oxygen levels in Chamber 212, measured for three months prior to the heat treatment. Similar to Figure 7, the oxygen levels before retort heat treatment are illustrated with a straight line in the figure.

[0049] [Comparative Example] Except for not placing the deoxygenating member 15 in the first chamber 11, multiple containers containing the comparative samples were prepared in the same manner as in the first embodiment, and were subjected to retort treatment in the same manner as in Example 1 and stored for three months. The changes in the oxygen content in the second chamber 12 were measured from before the heat treatment for three months, and the results are shown in Table 1 and Figures 7 and 8.

[0050] According to Examples 1 and 2 and the Comparative Example, as shown in Table 1 and Figures 7 and 8, the oxygen level in the second chamber 12 in both Examples 1 and 2 was lower than that in the Comparative Example after retort processing or after one month of storage. Furthermore, no change in the color of the contents occurred during the storage period in Examples 1 and 2, but in the Comparative Example, a change in the color of the contents occurred after one month of storage, as shown by A in the figure. [Explanation of symbols]

[0051] 10 containers 11 Room 1 12 Room 2 13 Partition 14 Discharge part 15 Deoxygenation component 16 Spout body 16a Through hole 16b Hull shape 16c protrusion 17 Cap 17a Top wall 21 Tubes

Claims

1. A first chamber and a second chamber are formed by sealing with a container wall having gas barrier properties, A partition separating the first chamber and the second chamber, It has a discharge section provided in the partition so as to connect the two chambers, which is liquid-tightly sealed and has a three-dimensional shape that allows water vapor and oxygen to pass through, A container in which a substance containing water is placed in the first chamber and subjected to heat treatment, The pair of laminated sheets constituting the container wall are stacked facing each other, the innermost layers are welded together at their peripheries, and the welding is carried out at an intermediate position so as to cross the periphery, thereby forming the first chamber and the second chamber separated by the partition portion on which the discharge portion is provided. At least the second chamber is equipped with an iron-containing oxygen absorber. The container is characterized in that the oxygen absorber has the function of removing the oxygen in the second chamber by allowing the water vapor of the contents in the first chamber to permeate to the second chamber side through the discharge part provided in the partition, and is configured to prevent the oxygen in the second chamber from permeating through the discharge part and entering the first chamber, thereby preventing oxidation of the contents in the first chamber.

2. The container according to claim 1, characterized in that the amount of moisture in the second chamber is less than the required amount of moisture in the oxidation reaction of the oxygen absorber corresponding to the amount of oxygen in the second chamber.

3. The container according to claim 1 or 2, characterized in that the oxygen-absorbing member containing the oxygen-absorbing agent is housed in the second chamber.

4. The container according to claim 1 or 2, characterized in that the oxygen absorber is contained in the container wall.

5. The container according to claim 1 or 2, characterized in that the discharge portion comprises a spout body having a through hole that allows the first chamber and the second chamber to communicate, and a removable cap that closes the through hole on the second chamber side.

6. A method for manufacturing a container having a first chamber and a second chamber formed by a container wall having gas barrier properties, a partition separating the first chamber and the second chamber, and a three-dimensional discharge section provided in the partition so as to connect the first chamber side and the second chamber side, which is liquid-tightly sealed and permeable to water vapor and oxygen, wherein the first chamber contains a contents containing water and is subjected to heat treatment, The pair of laminated sheets constituting the container wall are stacked facing each other, the innermost layers are welded together at their peripheries, and the welding is carried out at an intermediate position so as to cross the periphery, thereby forming the first chamber and the second chamber by the partition portion on which the discharge portion is provided. A method for manufacturing a container, characterized in that the contents are placed in the first chamber and sealed, an oxygen absorber containing iron is placed in at least the second chamber and sealed, and then the heat treatment is performed, during or after the heat treatment, the water vapor from the contents in the first chamber permeates to the second chamber through the discharge part provided in the partition, the oxygen in the second chamber is removed by the oxidation reaction of the oxygen absorber, the oxygen in the second chamber is prevented from permeating through the discharge part and entering the first chamber, and the contents in the first chamber are prevented from oxidizing.

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