Semi Automatic Modified Atmosphere Packaging Machine

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.

Adopting microcomputer programmable controller and touch screen control system, setting of each parameter 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.
The modified atmosphere packaging equipment is simple and convenient to operate. The double-start safety switch can ensure the safety of operators. The whole automatic packaging process can be completed by touching the start switch.

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.

MAP packaging machine is specially launched for fresh meat, cooked meat, vegetable, fruit, bread and other cooked food, etc. The modified atmosphere packaging machine adopts vacuum style. That is to say, under the condition of fully enclosed vacuum chamber, vacuum chamber is pumped by vacuum pump to form a high vacuum degree in the vacuum chamber and then filled with mixed gas which is suitable for extending shelf life of products. Modified atmosphere packaging can reduce the residual oxygen content in the package to a very low level, which is conducive to the accurate control of the proportion of mixed gas. In this way the gas replacement rate can reach ≥99%, which effectively solves the problem of the poor freshness preservation effect caused by the high residual oxygen content in the traditional method which use mixed gas to flush the package directly.

For modified atmosphere packaging machine (MAP), the natural gas in the packages is replaced by the appropriate gas at a certain proportion (Nitrogen, Oxygen, Carbon Dioxide) 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.

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.

Qualified modified atmosphere packaging machine (MAP) should conform to two key requirements, they are: high gas replacement rate and low gas mixing accuracy error rate. These two key indexes are needed when judge the quality of MAP machine. Shanghai Sanjing Machinery Co., Ltd deeply know the importance of the above two points and keep working towards the best indicator and until now the result is very satisfactory!

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.