Modified atmosphere packaging, also known as MAP, displacement gas packaging or inflatable packaging, is widely used for prolong food’s shelf life and for protective purpose. Do you know what kind of air / gas is used in the modified atmosphere packaging?
In fact, the commonly used air/ gases are N2, O2, CO2, O2 + N2 or CO2 + N2 + O2. Modified atmosphere packaging technology can be used to keep all kinds of food fresh, prolong the shelf life of food, and enhance the value of food. Shandong Kangbeite Packaging Machinery Co., Ltd. gives you an analysis of the application of different air/ gases one by one.
Application of CO2 in Food Modified Atmosphere Packaging
High concentration of CO2 can inhibit the reproduction of aerobic bacteria and fungi, prolong the stagnation period and exponential growth period of microbial growth, and play a role of antisepsis and mildew prevention. In China, nanotechnology has been successfully used to catalyze the synthesis of degradable plastics by CO2. That is to say, the catalyst for producing plastics from CO2 is “crushed” to nano-scale, and the catalyst molecule is polymerized with CO2. The catalyst can catalyze about 130 grams of CO2 per gram to synthesize a new packaging material containing 42% CO2. As an environmental protection material with excellent degradability, it has broad application prospects.
Application of Nitrogen in Food Modified Atmosphere Packaging
Nitrogen (N2) is an ideal inert gas, which has special effects in food packaging: it can reduce the oxygen content in packaging without chemical reaction with food and absorption of food, greatly inhibit the growth and reproduction of microorganisms such as bacteria and molds, slow down the oxidation and decay of food, so as to keep food fresh. Nitrogen-filled packaged foods can also prevent food from crushing, sticking or shrinking, and maintain the geometric shape, dry, crisp, color, fragrance and other advantages of food. At present, nitrogen-filled packaging is rapidly replacing the traditional vacuum packaging, and has been used in fried potato chips, fries, oil cooking food and so on. Nitrogen-filled packaging is expected to be applied to more food packaging because of its popularity among consumers, especially children and young people.
Application of Compound air/ gas in Modified Atmosphere Packaging
Compound modified atmosphere packaging (CAPM) is the really true MAP packaging in the world. The gas used for CAPM is generally composed of CO2, N2, O2 and a small amount of special gases. CO2 inhibits most aerobic spoilage bacteria growth and reproduction; oxygen inhibits the growth and reproduction of most anaerobic spoilage bacteria; maintains fresh meat color, oxygen-rich breathing and freshness of fresh fruits and vegetables; N2 is used as filling gas.
Mix Ratio of air is determined according to the type of food, preservation requirements and packaging materials, appropriate selection of mix ratio can achieve high quality of fresh-keeping, and good nutritional content preservation, effectively prong shelf life of food products.
Note: In real food production process, due to different climate, air pressure, preservation environment, food material, the mix ratio of air in each working case needs to be tested before massive production.
Shandong Kangbeite Food Packaging Machinery Co., Ltd. has introduced a full series of MAP modified atmosphere packaging machines with various automation grade. All machines are fully customizable to fulfill customers’ request for tray/bowl shape and size, packaging speed, with or without MAP function, etc. Please contact us for a quote by email [email protected], Whatsapp/wechat 008615006621108.