Fermented food container cap and fermented food container comprising same

Abstract

The present disclosure provides a fermented food container cap comprising: a cap body formed such that the upper end portion and lower end portion thereof have a step therebetween; and an inner seal disposed inside the cap body, wherein the upper end portion forms an empty space above the inner seal while covering an inlet of the container, and the lower end portion has threads that can be coupled to the inlet of the container. A multi-stage cap structure is applied to the fermented food container cap, and thus can induce leakage instead of bursting without damaging the cap itself, even if the inner seal falls out.

Description

Cap for a fermented food container and a fermented food container including the same

[0001] The present disclosure relates to a cap used in a fermented food container and a fermented food container including the same. More specifically, the present disclosure relates to a cap structure with improved storage and distribution stability of a fermented food.

[0002]

[0003] Fermented foods such as kimchi can face problems where containers are damaged by fermentation gases generated during storage and distribution. Specifically, gases such as carbon dioxide (CO2) produced during fermentation increase the internal pressure of the container, which can cause container breakage and leakage of contents, particularly in high-temperature environments or when subjected to physical impact. The resulting risks can cause critical problems not only during distribution but also in consumer usage environments.

[0004] In particular, for foods that undergo continuous fermentation, such as kimchi, if the fermentation gas is not effectively released, the internal pressure increases rapidly. To solve this problem, Korean Registered Patent No. 0428848 manufactures the sealing material at the opening of a fermented food container from a light-blocking, breathable film composite to facilitate the release of gas generated inside the container. Additionally, Korean Registered Patent No. 0442800 forms a gas vent on the lid of a kimchi container to facilitate the release of carbon dioxide gas generated during the storage of kimchi.

[0005] However, if this existing structure is applied to commercially available fermented food containers, the contents may block the gas vent if the container tilts or overturns during distribution. As a result, the inability to release gas leads to an inability to control the pressure within the container, potentially causing the cap to burst or, in severe cases, the contents to erupt explosively. This problem is particularly exacerbated in containers holding large volumes of fermented food, and the limitations on tilting during long-term distribution hinder smooth logistics.

[0006] Therefore, there is a need to develop a cap structure for fermented food containers that improves upon existing structures, is applicable not only to small-capacity but also large-capacity fermented food containers, withstands the internal pressure of the container during long-term distribution, effectively releases excessive gas generated during the fermentation process, and improves distribution stability.

[0007] [Prior Art Literature]

[0008] (Patent Document 1) Korean Registered Patent No. 0428848

[0009] (Patent Document 2) Korean Registered Patent No. 0442800

[0010]

[0011] As a result of research conducted by the inventors, a multi-stage structure and an inner seal were applied to a cap for a fermented food container, thereby minimizing the risk of the cap bursting even when gas release is not smooth.

[0012] Accordingly, the objective of the present disclosure is to provide a container cap with improved storage stability for fermented foods such as kimchi, and a fermented food container including the same.

[0013]

[0014] According to one aspect of the present disclosure, a cap for a fermented food container is provided, comprising a cap body formed with an upper portion and a lower portion having a step, and an inner seal disposed inside the cap body, wherein the upper portion covers the opening of the container and forms a void space above the inner seal, and the lower portion has a screw thread that can be coupled to the opening of the container.

[0015] In one embodiment, the height of the lower portion is 1.1 to 1.6 times the height of the upper portion.

[0016] In another embodiment, the inner seal is positioned at the boundary between the upper portion and the lower portion.

[0017] In another embodiment, the inner seal is directly attached to the opening of the container to seal the container.

[0018] In another embodiment, the inner seal is provided with a through hole for discharging gas generated inside the container to the outside, and the through hole includes a one-way valve that opens as pressure increases.

[0019] In another embodiment, the inner seal comprises a metal thin film layer, a polymer resin layer formed on one side of the metal thin film layer, and a sealing layer formed on the other side of the metal thin film layer.

[0020] In another embodiment, the metal thin film layer comprises aluminum, the polymer resin layer comprises one or more layers, each polymer resin layer comprises a polymer resin selected from the group consisting of polypropylene, polyethylene, and polyester, and the sealing layer comprises a fused material.

[0021] In another embodiment, the empty space formed at the top serves to contain the contents of the container so that they are not ejected to the outside when the inner seal detaches.

[0022] In another embodiment, the internal pressure strength measured while injecting air into the container at a flow rate of 0 to 1 L / min with the opening of the container sealed by the inner seal is 0.05 MPa to 0.07 MPa.

[0023] In another embodiment, the fermented food comprises at least one selected from the group consisting of kimchi, soybean paste, cheonggukjang, gochujang, and makgeolli.

[0024] In another embodiment, when a container holding 1.2 kg of kimchi is combined with the cap for the fermented food container, laid flat parallel to the ground, and a stability test is performed 10 times for 28 days at a temperature of 15°C and a pressure of 1 atm, the number of times the cap bursts due to gas generated inside is 1 or less.

[0025] In addition, according to another aspect of the present disclosure, a fermented food container is provided, comprising: a cap for the fermented food container; and a container body coupled to the cap.

[0026]

[0027] The cap for a fermented food container according to the present disclosure is equipped with a multi-stage cap structure, so that even if the inner seal detaches, the cap itself is not damaged and leakage can be induced instead of bursting. Through this, the pressure generated by fermentation can be effectively managed, thereby preventing damage to the container and ejection of the contents of the fermented food due to high-temperature environments or physical impact.

[0028] Therefore, the cap structure of the present disclosure can be applied to fermented food containers to significantly improve consumer safety and quality-related issues that occur during the distribution process.

[0029]

[0030] FIG. 1 shows a plan view of a cap for a fermented food container according to one embodiment.

[0031] FIG. 2 shows a cross-sectional view (A-A') of a cap for a fermented food container according to one embodiment.

[0032] FIG. 3 shows the state before and after the combination of the cap and the container according to one embodiment.

[0033] FIG. 4 is a cross-sectional view showing the laminated structure of an inner seal according to one embodiment.

[0034] FIG. 5 shows a cross-sectional view of a cap for a fermented food container according to one embodiment.

[0035] Figure 6 shows a cross-sectional view of a cap for a fermented food container according to the prior art.

[0036] <Explanation of Symbols> 10: Container cap, 20: Container body, 100: Cap body, 110: Top part, 115: Empty space, 120: Bottom part, 125: Screw thread, 200: Inner seal, 210: Polymer resin layer, 220: Metal thin film layer, 230: Sealing layer, 250: Through hole.

[0037]

[0038] The present disclosure is described in detail below through examples. The examples are not limited to those disclosed below and may be modified in various forms as long as the essence of the invention is not altered.

[0039] In the following description, if it is determined that a detailed description of a known configuration or function could obscure the features of the invention, such detailed description is omitted. Additionally, the sizes of each component in the drawings may be exaggerated or omitted for illustrative purposes and may differ from the actual sizes applied.

[0040] In this specification, the description that one component is formed above or below another component, or is connected or coupled to one another, includes both direct formation, connection, or coupling between these components and indirect formation, connection, or coupling through the interposition of another component.

[0041] In this specification, the use of the word “comprising” is intended to specify certain characteristics, regions, steps, processes, elements, and / or components, and unless specifically stated otherwise, it does not exclude the presence or addition of other characteristics, regions, steps, processes, elements, and / or components.

[0042] In this specification, terms referring to each component are used to distinguish them from other components and are not intended to limit the invention. Additionally, in this specification, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0043] In this specification, terms such as "first," "second," etc. are used to describe various components, and said components should not be limited by said terms. These terms are used for the purpose of distinguishing one component from another.

[0044] In numerical ranges defining the size, physical properties, etc., of components described in this specification, if a numerical range in which only the upper limit is defined and a numerical range in which only the lower limit is defined are separately exemplified, it should be understood that a numerical range combining these upper and lower limits is also included in the exemplary range.

[0045] FIG. 1 shows a plan view of a cap for a fermented food container according to one embodiment, and FIG. 2 shows a cross-sectional view (A-A') of a cap for a fermented food container according to one embodiment.

[0046] Referring to FIGS. 1 and 2, a cap (10) for a fermented food container according to one embodiment includes a cap body (100) and an inner seal (200) disposed inside the cap body.

[0047] The cap body (100) is formed such that the upper portion (110) and the lower portion (120) have a step difference. Specifically, the inner diameter of the upper portion (110) of the cap body may be smaller than the inner diameter of the lower portion (120). At this time, the outer diameter of the opening of the container coupled to the cap body may be the same as the inner diameter of the lower portion of the cap body. Additionally, the inner diameter of the upper portion of the cap body may be smaller than the outer diameter of the opening of the container coupled to the cap body.

[0048] For example, the inner diameter of the upper part (110) of the cap body may be 0.7 to 0.95 times the inner diameter of the lower part (120), for example, 0.7 to 0.9 times, or 0.8 to 0.9 times.

[0049] The height ratio of the upper part (110) and the lower part (120) of the cap body may be within a certain range. For example, the height of the lower part may be 1 time or more, 1.1 times or more, 1.2 times or more, 1.3 times or more, or 1.4 times or more of the height of the upper part, and may also be 2 times or less, 1.8 times or less, 1.7 times or less, 1.6 times or less, or 1.5 times or less.

[0050] In one embodiment, the height of the lower portion may be 1.1 to 1.6 times the height of the upper portion. In another embodiment, the height of the lower portion may be 1.2 to 1.5 times, 1.3 to 1.5 times, or 1.4 to 1.5 times the height of the upper portion. When the height ratio of the upper portion to the lower portion of the cap body is within the exemplary range, the contents of the container are contained in the empty space of the upper portion so that they do not eject outward when the inner seal detaches, thereby preventing damage to the cap body and making it more advantageous for the cap not to come off even if the inner seal expands. Furthermore, when within the exemplary range, fastening stability and sealing reliability are improved, and the release of fermentation gas is facilitated, which can improve storage stability and user safety even in large-capacity containers.

[0051] Meanwhile, the upper part (110) and the lower part (120) of the above-mentioned cap body may be formed integrally, and a cap body having an upper part and a lower part formed integrally with a step difference in this way may be formed by injection molding, etc.

[0052] The material of the cap body (100) is not particularly limited as long as it is a material that can be used in a food container. For example, the cap body may include a polymer selected from the group consisting of polypropylene, polyethylene, and polyethylene terephthalate.

[0053] The above cap body (100), specifically the upper and lower portions, can be applied to the circular opening of a bottle or jar-type container by having, for example, a circular flat shape.

[0054] The above cap body (100) has a structure that can be attached to and detached from the opening of a container. To this end, the lower part (120) of the cap body is provided with a screw thread (125) that can be attached to the opening of the container. By means of the screw thread (125), the cap body (100) can be easily and firmly attached to or detached from the opening of the container.

[0055] The above cap body (100) may have a sealed structure to prevent odors generated from the fermented food from leaking out of the container.

[0056] Meanwhile, the cap body may be provided with a vent to facilitate the smooth discharge of fermentation gas generated inside the container. Accordingly, the cap body is physically coupled to the opening of the container, while allowing the gas generated inside the container to escape to the outside.

[0057] FIG. 3 shows the state before and after the connection of the cap and the container body according to one embodiment. Referring to FIG. 3, the opening of the fermented food container body (20) is connected by a screw thread on the lower part (120) of the cap body, and the opening of the container body (20) can be sealed by an inner seal (200) located inside the cap body.

[0058] As previously explained, the upper and lower parts of the cap body have a step formed inside due to the difference in inner diameter, and due to this step, when the opening of the container is attached to the cap body, the opening of the container can be fixed at the boundary between the upper part (110) and the lower part (120).

[0059] Specifically, when the container opening is inserted while being coupled to the screw thread of the lower part (120) of the cap body, since the inner diameter of the upper part (110) is smaller than the outer diameter of the container opening, the container opening cannot be inserted further into the upper part of the cap body, and insertion may stop at the boundary between the upper part and the lower part.

[0060] When the cap body and the container opening are joined, the inner seal (200) is directly attached to the opening of the container to seal the container. Thus, inside the cap, the inner seal (200) is positioned at the boundary between the upper part (110) and the lower part (120) of the cap body.

[0061] Accordingly, after the cap and the container are combined, the upper part (110) of the cap body covers the opening of the container and forms an empty space (115) on the upper side of the inner seal (200).

[0062] An inner seal (200) can be inserted into the cap (100) for the container and sealed by joining it to the opening of the container body (20) containing the fermented food. Accordingly, the inner seal (200) can seal the opening primarily by directly contacting the opening of the container body (20).

[0063] The inner seal (200) may have the same shape as the opening of the container body (20) and may also have a diameter larger than the outer diameter of the opening of the container body (20). Additionally, the diameter of the inner seal (200) may be smaller than the inner diameter of the lower part of the cap body and larger than the inner diameter of the upper part of the cap body.

[0064] The inner seal may include a sealing layer that can be fused to the opening of the container. The sealing strength by the fusion can be measured as the internal pressure strength at which the inner seal is torn when the inner seal is attached to the opening of the container (i.e., the sealing layer is fused) and a needle is used to continuously inject a certain amount of air into the container. For example, the internal pressure strength measured while injecting air into the container at a flow rate of 0 to 1 L / min while the opening of the container is sealed by the inner seal may be 0.04 MPa or higher, specifically 0.05 MPa or higher, and more specifically 0.05 MPa to 0.07 MPa. By having such internal pressure strength, the inner seal can prevent deformation of the container caused by gas emitted from the fermented food inside the container and induce expansion or detachment of the inner seal.

[0065] The above pressure resistance can be obtained by measuring the peak just before the inner seal detaches using a pressure resistance gauge (FKT-100, SUN SCIENTIFIC) and an air compressor pump, and the measurement can be performed with a flow rate of 0 to 1 L / min, but is not limited thereto. In addition, the above pressure resistance can be tested by attaching the inner seal by capping while applying a torque ratio of 40 to 50%, assuming the maximum torque ratio applicable for capping in the production line equipment is 100%. Furthermore, the above pressure resistance can be the average value after measuring three or more times.

[0066] In addition, the inner seal may have a multilayer structure further comprising a layer supporting the sealing layer and a layer coating the surface thereof.

[0067] FIG. 4 is a cross-sectional view showing the laminated structure of an inner seal according to one embodiment.

[0068] Referring to FIG. 4, the inner seal may include a metal thin film layer (220), a polymer resin layer (210) formed on one side of the metal thin film layer, and a sealing layer (230) formed on the other side of the metal thin film layer.

[0069] The metal thin film layer (220) may include, for example, aluminum.

[0070] In addition, the polymer resin layer (210) may be one layer or two or more layers. Each polymer resin layer may include a polymer resin selected from the group consisting of polypropylene, polyethylene, and polyester.

[0071] In one embodiment, the polymer resin layer comprises a first polymer resin layer and a second polymer resin layer, and each polymer resin layer may comprise a polymer resin selected from the group consisting of polypropylene, polyethylene, and polyethylene terephthalate. More specifically, the first polymer resin layer may comprise polyester, and the second polymer resin layer may comprise polyethylene, and the first polymer resin layer may be located outside the second polymer resin layer. Even more specifically, the second polymer resin layer may comprise polyethylene foam.

[0072] In another embodiment, the inner seal may additionally include a bonding layer between the metal thin film layer (220) and the polymer resin layer (210).

[0073] The sealing layer (230) may include a fused material. The fused material is not particularly limited as long as it is a material that can be used in a food container. Specifically, the sealing layer may include a material that can be fused to the opening of the container by high frequency.

[0074] In addition, a knob may be provided on the outer edge of the inner seal (200), and the inner seal (200) can be more easily removed from the opening of the container by holding the knob with one's hand.

[0075] Referring to FIG. 2, the inner seal may be provided with a through hole (250) for discharging gas generated inside the container to the outside. Additionally, the through hole may include a one-way valve that opens as pressure increases, so that only gas generated inside the container is discharged to the outside, while the inflow of outside air into the container is blocked.

[0076] In addition, the inner seal may further include a filter that is in close contact with the through hole, thereby preventing some of the contents or liquid of the fermented food contained in the container from leaking out, and for this purpose, the filter may be formed of a hydrophobic material.

[0077] FIG. 5 shows a cross-sectional view of a cap for a fermented food container according to one embodiment. As shown in FIG. 5, the upper part (110) of the cap covers the opening of the container and forms an empty space (115) on the upper side of the inner seal (200).

[0078] The empty space (115) formed at the top of the cap body in this way can serve to hold the contents of the container so that they do not leak out when the inner seal is detached.

[0079] Specifically, even if the inner seal attached to the container opening detaches due to an increase in fermentation gas generated from the fermented food inside the container, the empty space inside the upper section formed by the multi-stage cap structure prevents the cap itself from being damaged and allows for leakage instead of bursting. In particular, even if the inner seal is equipped with a perforation to prepare for an increase in fermentation gas, the contents may block the perforation if the container tilts during distribution or storage; however, storage stability can be ensured even in such cases due to the multi-stage structure of the cap.

[0080] FIG. 6 shows a cross-sectional view of a cap for a fermented food container according to the prior art. Referring to FIG. 6, the cap according to the prior art generally has a structure in which the upper part of the cap body (100) is in full contact with an inner seal (200) attached to the opening of the container, or there is almost no empty space between them. Accordingly, when the fermentation gas generated inside the container increases during the distribution or storage process of the container, the cap body (100) may burst along with the detachment of the inner seal (200) attached to the opening of the container, causing the contents to eject and creating a safety risk.

[0081] The present disclosure also provides a fermented food container comprising: a cap for a fermented food container as described above; and a container body coupled to said cap.

[0082] The fermented food to which the container of the present disclosure applies may not be particularly limited as long as it is a food that undergoes continuous fermentation, such as kimchi.

[0083] In one embodiment, the fermented food may include at least one selected from the group consisting of kimchi, soybean paste, cheonggukjang, ssamjang, gochujang, salted seafood, and makgeolli, but is not limited thereto.

[0084] The above-mentioned fermented food may be a food in which continuous fermentation proceeds by microorganisms and fermentation gases such as carbon dioxide are generated during storage or distribution.

[0085] The above-mentioned fermented food may have a pH of 3 to 7 under storage or distribution conditions of 1 to 30 days at 0°C to 25°C, but is not limited thereto. Additionally, after manufacturing 200g of the above-mentioned fermented food and undergoing a fermentation period of 48 hours at 25°C, the amount of carbon dioxide produced in the container may be 1500 to 4500 mg / kg / day, but is not limited thereto. The amount of carbon dioxide produced may be measured using a carbon dioxide sensor.

[0086] The above-mentioned fermented food container may be a large-capacity container, for example, a container having a capacity of 1 kg or more, or 1.5 kg or more.

[0087] The cap for a fermented food container according to the present disclosure can effectively manage the pressure generated by fermentation, thereby preventing damage to the container and ejection of kimchi contents caused by high-temperature environments or physical impacts.

[0088] Therefore, the cap structure of the present disclosure can be applied to large-capacity fermented food containers, and can significantly improve consumer safety and quality-related issues that occur during the distribution process.

[0089] In one embodiment, when a container holding 1.2 kg of kimchi is combined with the cap for the fermented food container and laid flat parallel to the ground, and a stability test is performed 10 times for 28 days at a temperature of 15°C and a pressure of 1 atm, the number of times the cap bursts due to gas generated inside may be 1 or less. The meaning of "lay flat parallel to the ground" may mean laying the container flat such that the angle formed by the long axis of the container (or the vertical axis when the container is upright, e.g., the center reference line in FIG. 3) with the ground (horizontal plane) is 0, and in this case, the bottom surface of the container may be perpendicular to the ground.

[0090] In another embodiment, when the stability test is performed 10 times, the number of times the cap bursts due to gas generated inside may be 0.

[0091]

[0092] The following examples will be explained in more detail, but are not limited to the scope of these examples.

[0093]

[0094] Example 1: Manufacture of a cap having a multi-stage structure

[0095] A container cap (10) having a structure as shown in FIGS. 1 and 2 was manufactured. First, a cap body (100) of the shape shown in FIGS. 1 and 2 was formed by injecting polypropylene (PP) into a mold. Specifically, the upper part (110) and the lower part (120) of the cap body were formed to have a step, and a screw thread (125) that can be coupled to the opening of the container was formed inside the lower part.

[0096] In addition, an inner seal was manufactured having a laminated structure of polyester film / polyethylene foam / bonding layer / aluminum foil / sealing layer. The sealing layer was formed using a material that has fusion properties at high frequency. Furthermore, a through hole for gas discharge was formed in the center of the inner seal, and a one-way valve to prevent the inflow of outside air and a filter to prevent the leakage of internal liquid were provided.

[0097] Subsequently, an inner seal (200) was inserted near the boundary between the upper part (110) and the lower part (120) inside the cap body. As a result, the upper part (110) of the cap body formed an empty space (115) above the inner seal (200).

[0098]

[0099] Comparative Example 1: Manufacture of a cap having a conventional structure

[0100] A container cap having a structure as shown in Fig. 6 was manufactured. First, a cap body of the shape shown in Fig. 6 was molded by injecting polypropylene (PP) into a mold. Specifically, the cap body was formed so as not to have a multi-stage structure, and a screw thread was formed inside the cap body to be coupled with the opening of the container.

[0101] An inner seal identical to that in Example 1 was inserted into the interior of the cap body produced in this manner. As a result, the inner ceiling of the cap body came into contact with the upper surface of the inner seal.

[0102]

[0103] Test Example 1: Storage Stability

[0104] A container containing 1.2 kg of fresh kimchi (CJ CheilJedang) was prepared and the cap manufactured in Example 1 above was attached. Additionally, a container containing 500 g of fresh kimchi (CJ CheilJedang) was prepared and the cap manufactured in Comparative Example 1 above was attached. Each container with the attached cap was laid parallel to the ground and stored for 28 days at a temperature of 15°C and a pressure of 1 atm. Here, laying parallel to the ground means laying the container so that the angle formed by the major axis of the container (or the vertical axis when the container is upright, e.g., the center reference line in Fig. 3) with the ground (horizontal plane) is 0, and in this case, the bottom surface of the container is perpendicular to the ground.

[0105] When this test was performed 10 times, the number of times the cap burst due to gas generated inside the container was recorded. As a result, in the case of the container with the cap manufactured in Example 1, not a single burst occurred during the 10 tests. On the other hand, in the case of the container with the cap manufactured in Comparative Example 1, 4 bursts occurred during the 5 tests.

[0106]

[0107] Test Example 2: Pressure Resistance

[0108] 1.2 kg of sliced ​​napa cabbage kimchi was placed in a container, and the inner seal of Example 1 was attached (fused) to the opening of the container. The one-way valve of the through hole provided in the inner seal was closed, and while continuously injecting a constant amount of air into the container using a needle, the internal pressure strength at which the inner seal was torn was measured. The internal pressure strength was obtained by measuring the peak value just before the inner seal detached using an internal pressure strength measuring instrument (FKT-100, SUN SCIENTIFIC) and an air compressor pump, with the flow rate set to 0 to 1 L / min. During the test, the container was maintained in a lying position at an angle of 15 degrees to the ground (the angle formed by the major axis of the container with the ground was 15 degrees). The internal pressure strength was repeatedly measured by capping while applying an equipment torque ratio of 40 to 50%. The above equipment torque ratio refers to the torque ratio applied in the test when the maximum torque ratio applicable for capping in the production line equipment is set to 100%, and as the torque ratio increases, more torque is applied for capping, so the inner seal can be attached more strongly. The results of Test Example 2 above are summarized in Table 1 below, and it was confirmed that the pressure resistance of the container with the inner seal attached is excellent.

[0109] Equipment Torque Ratio 50% 45% 40% Internal Pressure Strength (MPa) 0.06 50.05 50.05 10.06 70.05 50.05 60.06 50.05 60.04 80.06 60.05 80.05 7 Average Value (MPa) 0.06 57 50.05 60.05 3

Claims

1. A cap body formed such that the upper and lower portions have a step difference, and It includes an inner seal disposed inside the above-mentioned cap body, and A cap for a fermented food container, wherein the upper portion covers the opening of the container and forms an empty space above the inner seal, and the lower portion has a screw thread that can be coupled to the opening of the container.

2. In Paragraph 1, A cap for a fermented food container, wherein the height of the lower portion is 1.1 to 1.6 times the height of the upper portion.

3. In Paragraph 1, A cap for a fermented food container, wherein the inner seal is positioned at the boundary between the upper portion and the lower portion.

4. In Paragraph 1, The above inner seal is a cap for a fermented food container that is directly attached to the opening of the container to seal the container.

5. In Paragraph 1, A cap for a fermented food container, wherein the inner seal has a through hole for discharging gas generated from inside the container to the outside, and the through hole includes a one-way valve that opens as pressure increases.

6. In Paragraph 1, The above inner seal is metal thin film layer, A polymer resin layer formed on one surface of the above-mentioned metal thin film layer, and A cap for a fermented food container comprising a sealing layer formed on the other side of the metal thin film layer.

7. In Paragraph 6, The above metal thin film layer includes aluminum, The above polymer resin layer is one layer or two or more layers, and each polymer resin layer comprises a polymer resin selected from the group consisting of polypropylene, polyethylene, and polyester. The above sealing layer comprises a fused material, a cap for a fermented food container.

8. In Paragraph 1, A cap for a fermented food container having an internal pressure strength of 0.05 MPa to 0.07 MPa measured while injecting air into the container at a flow rate of 0 to 1 L / min with the opening of the container sealed by the inner seal above.

9. In Paragraph 1, The empty space formed in the upper part above is A cap for a fermented food container that serves to hold the contents of the container so that they do not leak out when the inner seal is detached.

10. In Paragraph 1, A cap for a fermented food container, wherein the above-mentioned fermented food comprises at least one type selected from the group consisting of kimchi, soybean paste, cheonggukjang, gochujang, and makgeolli.

11. In Paragraph 1, A cap for a fermented food container in which, when a container containing 1.2 kg of kimchi is combined with the cap for the fermented food container, laid flat parallel to the ground, and stored for 28 days at a temperature of 15°C and a pressure of 1 atm 10 times, the number of times the cap bursts due to internal gas is 1 or less.

12. Cap for a fermented food container according to claim 1; and A fermented food container comprising a container body combined with the above-mentioned cap.

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