Complex Atmosphere Packaging Machine theory – atmosphere, preservation, packagin
Complex atmosphere packing machine is in a vacuum packaging machine, packaging machine on the basis of nitrogen developed a new packaging equipment food fruit and vegetable preservation. The most prominent feature is the solution of the vacuum packaging and high temperatures after sterilization of food taste great taste damage, aseptic packaging and packing requirements nitrogen greater lack of investment. Through the composite modified atmosphere packaging, to ensure that the original taste of food, taste, to ensure the food's authentic, original appearance.
1, the difference between fresh and shelf-life
People to buy food, used to focus on durability, but durability is a necessary condition for food security. As people's living standards improve, people's demand of food has not only focus on their safety, but also want fresh food is purchased, so "fresh" concept came into being. The so-called "fresh" means food in a safe context, but also in nutrition, color, taste and flavor and so can be guaranteed. The food is fresh juice, natural flavor, and freshness will be able to shelf life, shelf life may not fresh.
2, composite modified atmosphere packaging (MAP) principle of preservation
1. Compound known as Modified Atmosphere Packaging gas replacement packaging, international packaging called MAP (ie ModifiedAtmospherePacking). Composite modified atmosphere packaging machine applies a composite fresh gas (2-4 kinds of gas mixture ratio on food characteristics), on the box / bag in the air for replacement, change the box / bag of food in the external environment, inhibit bacteria (microbes ) growth, regeneration and slow down the metabolism rate of fresh fruits and vegetables, food preservation to extend the period or shelf life.
2. Atmosphere generally carbon dioxide gas (CO2), nitrogen (N2), oxygen (O2) and a small amount of special gas composition. CO2 gas can inhibit the growth of most bacteria and mold breeding corruption and the role of fresh gas is the main antibacterial component; O2 inhibit the growth of most anaerobic bacteria, to keep meat fresh fruits and vegetables to maintain color and aerobic respiration, to keep fresh degree of effect; N2 is an inert gas, and food does not work, as the filling gas, and CO2, O2, and specialty gases composed of complex fresh gas. Different food fruits and vegetables, fresh gas composition and proportion are also different.
3, MAP packaged fresh-keeping technology of composite key
Composite Atmosphere Packaging technology is the key to keeping gas ratio of composite control precision and gas exchange rate. As the performance characteristics of their own fruit and vegetable food is different, the ratio of gas properties on the preservation of considerable sensitivity. Therefore, the composite modified atmosphere packaging machine should be qualified with high precision automatic gas mixing system, the percentage of error should be less than 2%, the gas replacement rate of more than 99.5%, otherwise the preservation effect will be greatly affected, even some products, fresh effects even worse than ordinary sealed packaging. Equipment, qualified or not, these two parameters should be the standard.
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