modified atmosphere pack

The modified atmosphere packaging technology will play a role in the intelligent packaging era. With some food and vegetable fresh-keeping products becoming the mainstream of food consumption and occupying an increasing share in the domestic and foreign markets, the application of modified atmosphere packaging machine will greatly prolong the shelf life of food. With replaceable sealing and cutting mold of modified atmosphere packaging machine, users can change the shape and specification of the tray at any time.

Controlled atmosphere packaging is a new type of food preservation technology which will replace the air in the package by mixed gas (usually CO2, N2 and O2 with certain proportion). It adopts the different role of such mixed gas to inhibit the growth of microorganisms which will cause food spoilage, and reduce the respiratory rate of active food (plant-based foods such as fruit and vegetable) . In this way, it will keep food fresh and extend the shelf life. The food in modified atmosphere package will maintain the original color, flavor, taste, shape and nutrition of the food.

Modified atmosphere packaging tray sealer has the characteristics of high automation, reliable quality, long service life, simple maintenance process, large production and wide range of applicability. According to the types of fresh gas needed by different foods, three kinds of fresh gas, two kinds of fresh gas and one kind of fresh gas can be selected to meet different needs of users. High precision gas mixing system can be used to rapidly convert different types and mixing ratios of fresh gas according to different food preservation requirements, so as to achieve the fresh-keeping effect required by customers.

The main changes in automated MAP packaging equipment are reducing labor, reducing the possibility of contamination, and making food safer. This is also our goal. MAP packaging of cold meat, using modified atmosphere preservation technology to fill a certain proportion of gas into the package and seal it to isolate fresh meat from the outside world. The mixed gas in the MAP package can inhibit the growth and reproduction of microorganisms and prevent its oxidation. So as to achieve the purpose of extending the shelf life of fresh meat. In addition to keeping the meat fresh, the boxed modified atmosphere packaging can clearly show the meat quality and promote product sales. The MAP packaging seal is strong and easy to tear, which can give customers a high-quality consumption experience.

Modified atmosphere fresh-keeping gas is generally composed of carbon dioxide (CO2), nitrogen (N2), oxygen (O2) and a small amount of special gases. CO2 has the effect of inhibiting the growth and reproduction of most putrefaction bacteria and molds, and is the main bacteriostatic component in the protective gas. O2 can inhibit the growth and reproduction of most anaerobic spoilage bacteria, maintain the color of fresh meat, maintain the aerobic respiration of fresh fruits and vegetables, and maintain their freshness. N2 is an inert gas, which does not work with food. As a filling gas, N2 is composed of composite fresh-keeping gas with CO2, O2 and special gases. The composition and proportion of carbon dioxide (CO2), nitrogen (N2), oxygen (O2) are different for different food.

Modified atmosphere packaging machine is widely used in fresh, cooked food, fruits and vegetables, and aquatic products. Modified atmosphere packaging machine has the characteristics of keep freshness, keep quality, keep color, keep taste, and keep shape. Modified atmosphere packaging machine solves the problems of unstable product quality, high product loss rate, and product nutrition loss. Shanghai Sanjing Machinery Co., Ltd. has specialized in producing vacuum atmosphere modified packaging machines for more than ten years. We have gained rich experience for modified atmosphere packaging and hope to do our best to assist your esteemed company.

For modified atmosphere packages (MAP), the natural gas in the packages is replaced by the appropriate gas (Nitrogen, Oxygen, Carbon Dioxide at a certain proportion) for the product. In order to maintain the shape, color and freshness of the product, the air in the modified atmosphere package is replaced by a mixture of gas suitable for the product. This modified atmosphere is usually composed of carbon dioxide, nitrogen and oxygen.

When cooked food are packaged in modified atmosphere package (MAP), the mixing ratio of fresh gas is: nitrogen (N2) 64% ~ 66%, carbon dioxide (CO2) 34% ~ 36%, gas replacement rate ≥98%. Since many microorganisms (bacteria) need O2 to grow and reproduce, reducing oxygen content can slow down the growth rate of bacteria (except anaerobic bacteria). The results showed that the reasonable mixture of N2 and CO2 formed a broad spectrum of bacteriostasis, color and taste protection layer on the food surface, and preserved cooked food under low oxygen environment. Therefore, when the error rate and replacement rate of gas mixing precision cannot reach the target, its bacteria-inhibiting and fresh-keeping effect is basically ineffective.

High precision gas mixing system can be used to rapidly convert different types and mixing ratios of fresh gas according to different food preservation requirements, so as to achieve the fresh-keeping effect required by customers. Adopting microcomputer programmable controller and touch screen control system, setting of each parameter for modified atmosphere packaging machine is highly accurate and the operation is stable and reliable. According to the properties of packaging materials, you only need to set the packaging parameters for once and then it can continuously and completely for all the packaging steps.