As a traditional food, the shelf life of mooncakes is affected by many factors, among which the sealing of the packaging is one of the key factors. Metal mooncake jar plays an important role in extending the shelf life of mooncakes due to its good sealing structure design.
The oil components in mooncakes are easily oxidized under the action of oxygen in the air, causing the mooncakes to deteriorate and change in taste. The primary function of the sealing structure design of the metal mooncake jar is to prevent air from entering. Generally speaking, the metal mooncake jar adopts the crimping sealing technology to tightly combine the edge of the jar cover and the jar body through mechanical crimping to form a relatively closed space, which greatly reduces the contact between the outside air and the mooncakes, thereby slowing down the oxidation rate of the oil in the mooncakes and extending the shelf life of the mooncakes.
Water vapor in the air is also an important factor affecting the shelf life of mooncakes. Mooncakes contain a certain amount of water and have a high sugar content, which is easy to absorb water vapor in the air. If the mooncakes absorb too much water vapor, it will cause them to become soft, moldy and deteriorate. The sealing structure of the metal mooncake jar can effectively block the intrusion of water vapor. In addition to the crimping seal, some metal mooncake jars also add a sealing rubber ring between the jar lid and the jar body to further enhance the sealing effect. This sealing structure can isolate the mooncakes from the moist air outside, keep the mooncakes dry, and keep their original taste and quality for a long time.
The growth and reproduction of microorganisms is one of the main reasons for the spoilage of mooncakes. Good sealing can create a relatively sterile environment for mooncakes and inhibit the growth of microorganisms. Metal mooncake jars are usually sterilized before sealing. After sealing, it is difficult for external microorganisms to enter the jar, thereby reducing the chance of microbial contamination of mooncakes. At the same time, since the air in the jar is exhausted or in a low oxygen state, it is not conducive to the survival and reproduction of aerobic microorganisms, which greatly extends the shelf life of mooncakes.
The flavor of mooncakes is an important manifestation of their quality. The sealing structure of the metal mooncake jar helps to maintain the flavor of mooncakes. On the one hand, it can prevent the aroma components in the mooncakes from volatilizing to the outside world, so that the mooncakes can maintain their original fragrance for a long time. On the other hand, the sealing structure can prevent external odors from entering the jar, preventing the mooncakes from absorbing external odors and affecting their taste and flavor.
In addition to the oxidation of oils and fats, other ingredients in mooncakes may also undergo oxidation reactions in the air. The sealing structure of the metal mooncake jar can reduce the contact between mooncakes and oxygen and reduce the degree of oxidation reactions. For example, the starch in mooncakes may age under the action of oxygen, causing the mooncakes to become hard and taste worse. A good seal can slow down this oxidation reaction, allowing the mooncakes to maintain a good taste and texture during the shelf life.
The sealing structure of the metal mooncake jar can not only protect the mooncakes at the chemical level, but also play a protective role at the physical level. The sealed jar can provide a stable environment for the mooncakes to prevent the mooncakes from being subjected to physical damage such as external extrusion and collision during transportation and storage. If the mooncake packaging is not sealed, the mooncakes are easily broken and deformed when subjected to external forces, which affects their appearance and quality and shortens their actual shelf life.
The sealing structure design of the metal mooncake jar has a positive and important impact on the shelf life of mooncakes by preventing air from entering, blocking water vapor intrusion, inhibiting microbial growth, maintaining the flavor of mooncakes, reducing oxidation reactions, and avoiding physical damage. Good sealing can enable mooncakes to maintain their original quality, taste and flavor for a longer period of time, meeting the needs of consumers in the process of purchasing and eating mooncakes.
