JP-7854958-B2 - Container and method for manufacturing the same

JP7854958B2JP 7854958 B2JP7854958 B2JP 7854958B2JP-7854958-B2

Inventors

相原貴裕
石川啓太
菅原陸

Assignees

イーエヌ大塚製薬株式会社

Dates

Publication Date: 20260507
Application Date: 20230331

Claims (6)

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.
The container according to claim 1, characterized in that the moisture content in the second chamber is less than the required moisture content for the oxidation reaction of the oxygen absorber corresponding to the oxygen content in the second chamber.
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.
The container according to claim 1 or 2, characterized in that the oxygen absorber is contained in the container wall.
The container according to claim 1 or 2, characterized in that the discharge section comprises a spout body having a through-hole that allows communication between the first chamber and the second chamber, and a removable cap that closes the through-hole on the second chamber side.
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 .

Description

This invention relates to a container and a method for manufacturing the same. Conventionally, in containers requiring a dispensing port, it was known that even if the contents were covered with a gas barrier film, the contents would deteriorate due to oxygen entering from outside the container through the dispensing port. In particular, in containers containing low-fluidity materials, the contents near the dispensing port would deteriorate intensively due to oxygen. Therefore, containers have been proposed that cover not only the contents but also the dispensing port with a gas barrier film to prevent oxidation of the contents by oxygen entering through the dispensing port. For example, Patent Document 1 below proposed a packaging bag in which a sealed chamber and a storage chamber are separated by a partition, and a dispensing device for dispensing food from the storage chamber is heat-sealed to the partition. In this packaging bag, the entire bag is made of a gas barrier laminated film, and not only the food in the storage chamber but also the dispensing device in the sealed chamber is covered with the gas barrier laminated film. This prevents oxygen from outside the packaging bag from permeating through the dispensing device and entering the storage chamber, thus preventing oxidation and deterioration of the food in the storage chamber. The document also describes a modification in which a stopper is integrally molded into the body of the dispensing device to seal the dispensing hole in order to improve shielding and prevent leakage of food from the dispensing hole during heat sterilization, and further modifications describe blocking the dispensing hole with a separate stopper and attaching an inner sealing material such as aluminum foil to the opening of the dispensing hole. Patent Document 2 (described below) proposed a pouch with a spout that provided gas barrier properties to the spout by covering the spout with a gas barrier film, or by covering the spout and oxygen absorber together with a gas barrier film. This pouch with a spout improved shielding by providing gas barrier properties to the spout, preventing external oxygen from permeating through the spout and entering the interior, thus preventing deterioration of the contents. Japanese Patent Application Publication No. 11-130153Japanese Patent Publication No. 2003-95288 The problem the invention aims to solve 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 absorbent 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 storing and heat-treating contents, and there was a problem that it was not easy to improve the antioxidant effect. 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 subjected to heat treatment, and that can improve the oxidation prevention function of the contents that are heat-treated after being contained. This is a front view of a container according to the first embodiment of the present invention.This is a longitudinal cross-sectional view of the dispensing portion of a container according to the first embodiment of the present invention.This is a longitudinal cross-sectional view of the first chamber of a container according to the first embodiment of the present invention.Figures (a) to (c) illustrate a method of using a container according to the first embodiment of the present invention.This is a front view of a container according to a second embodiment of the present invention.This is a longitudinal cross-sectional view of the discharge section showing a modified example of the first and second embodiments.This graph shows the change in the amount of oxygen in the second chamber of the container in Example 1 and Comparative Example 1 of the present invention over time.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. Embodiments of the present invention will be described in deta