How long can the modified atmosphere packaging machine keep fresh?

The food modified atmosphere packaging machine can inhibit the reproduction of spoilage organisms, but there are many pathogenic bacteria that are less affected. Therefore, seafood or meat modified atmosphere packaging machine products may potentially produce a toxin problem that is harmful to human health before the sensory perception of spoilage. In fact, delaying food spoilage gives many contaminated pathogens an opportunity to delay their reproduction, especially in retail and household refrigerators. The room temperature often exceeds 10 degrees, and some pathogenic bacteria can multiply when the refrigeration temperature fluctuates. There are sexual problems in refrigerated packaged food, including vacuum packaging and gas packaging, and the modified atmosphere packaging machine solves these troubles. The original packaging boxes and bags are evacuated and filled with a certain proportion of mixed gas to effectively preserve and protect the packaged food. It is a must-have equipment for most food packaging. The modified atmosphere fresh-keeping packaging machine is a boxed modified atmosphere fresh-keeping packaging machine specially launched for cold meat, cooked food, fruits and vegetables. The basic principle of this packaging is to use high barrier materials. (Plastic tray and cover film) isolate the food from the outside air, the tray is filled with mixed gas to keep the original flavor and appearance of the packaged food for a long time, and to inhibit the growth of various bacteria and microorganisms, the equipment adopts The fully enclosed space vacuum replacement method is used to inflate the food fresh-keeping packaging, that is, in the fully closed state of the vacuum chamber, the vacuum chamber is evacuated by a vacuum pump, so that a high vacuum degree is formed in the vacuum chamber, and then the vacuum chamber is filled with suitable food for extended preservation. gas. This packaging method can reduce the residual oxygen content in the container, which is conducive to the precise control of the proportion of various fresh-keeping gases, and effectively solves the problem of poor fresh-keeping effect caused by high residual oxygen content in the traditional flushing compensation type modified atmosphere packaging, filling and filling. Inconsistency in the proportion of incoming gas, inability to grasp and control the shelf life of fresh-keeping food.

The preservation period of the modified atmosphere packaging machine is inseparable from the characteristics of the food itself, the pre-cooling process of the food, the temperature of the environment, the residual oxygen content, etc., so how long the modified atmosphere packaging can be kept fresh is a comprehensive problem, and it cannot be explained independently of the modified atmosphere packaging. Under normal circumstances: when the pre-cooling process of the food is well handled, the ambient temperature is effectively controlled, and the performance of the machine is guaranteed, the general fresh-keeping period of cooked food is 12 to 15 days. Fruits and vegetables vary according to the ingredients. For example, strawberries can be stored for more than 15 days, cherries can also be stored for more than 12 days, and frozen meat can be stored for 7 to 9 days. The key point of modified atmosphere packaging is the pre-cooling process of the food. If the pre-cooling process is not done properly , causing the number of colonies at the front end to exceed the standard, such ingredients themselves are not fresh, so after using modified atmosphere packaging, the number of days of freshness will also be greatly discounted. Time placement, we have done corresponding experiments. Under the same conditions as the front end, one adopts modified atmosphere packaging and the other is ordinary sealed packaging. Under the condition of direct sunlight at 25 degrees Celsius for 2 hours, the number of colonies in the modified atmosphere packaging box and the ordinary sealed packaging There is no obvious difference, which means that the effect of modified atmosphere packaging is not very obvious under normal temperature conditions. Therefore, another core of modified atmosphere packaging is the configuration of the whole process of cold chain system. If customers want to use modified atmosphere packaging products, the cold chain system It must be considered, otherwise the effect of modified atmosphere packaging will be greatly reduced.

For equipment, there are two main points that affect the fresh-keeping period of modified atmosphere packaging machine products, one is the residual oxygen content, and the other is the mixing accuracy of the gas. The performance of the equipment is also an important guarantee for the preservation period of the ingredients. To sum up, the preservation period of the modified atmosphere packaging is not an independent problem, it is composed of many key parts, so the overall planning must be carried out to do a good job in the modified atmosphere packaging , so as to achieve the expected effect, Zhejiang Mingwei Packaging Machinery Co., Ltd. has advanced process equipment, excellent design team, professional production organization, comprehensive quality control system, and ensure the safe and secure use of each customer.