Overview of composite air conditioning packaging technology
The principle of composite modified atmosphere packaging technology is to use compound in food plastic bag for the fresh gas or air in the box for replacement, change the ratio of gas inside the plastic bags or boxes, the formation of micro gas within the bag or box environment - that is, to form the micro, and controlling so as to have the effect of food preservation.According to the actual needs of customers, a certain proportion of O2+CO2+N2, N2+CO2, O2+CO2 mixture gas can be filled into the packaging, thus extending the shelf life of food and improving the value of food.
The gas used in composite gas-regulated fresh-keeping packaging technology is generally composed of CO2, N2, O2 and a small amount of special gases.CO2 can inhibit the growth and reproduction of most aerobic microorganisms.O2 inhibits the growth and reproduction of most anaerobic putrefaction bacteria.Maintain the color of fresh meat, maintain the oxygen rich respiration and freshness of fresh fruits and vegetables;N2 is the filling gas.Composite gas composition ratio according to the type of food, storage requirements and packaging materials to choose the appropriate packaging food quality, nutritional composition is good, can achieve the original characteristics, delay the shelf life of the effect.
The composite air conditioning packaging technology can be widely used in the packaging of fresh food such as meat, poultry, fish, fruits and vegetables, cooked meat products, baked goods such as bread and cakes.The air-conditioned food has been more and more recognized by food processing manufacturers and consumers because it can better maintain the original taste, color, shape and nutrition of the food and achieve a longer freshness period.In the European and American markets, the use of pneumatic packaging of food development points rapidly, annual growth rate up to 25 percent, the annual volume of pneumatic packaging products has exceeded 5 billion boxes.
The compound air conditioning fresh-keeping packaging technology adopts the combined control of machine, electricity and gas, which realizes the man-machine interface dialogue by the PLC unitary touch screen, and the actions and control parameters of each part can be set and modified by PLC.Easy operation and control, reliable, low failure rate;High degree of automation in packaging process, high rate of packaging finished products;The main components of the whole machine are made of stainless steel, to ensure food hygiene, in line with the food machinery standard GB 16798-1997;Mold shape can be configured according to the shape of the packaging box selected by the user, with a wide range of application;Gas mixing ratio is accurate to ensure food preservation requirements.
Taking fruits and vegetables as an example, the technical process of composite air-conditioned fresh-keeping packaging is as follows:
To sum up, composite air conditioning fresh-keeping packaging technology has the characteristics of multi-function, wide range of packaging application, low operating cost, which can help solve the current difficult problem of fresh-keeping!