We all know that with vacuum packaging, food packaging will have a great guarantee in the future. Various packaging techniques are presented from time to time in the modern market. The use of high technology provides a complete talent foundation for the perfection of food packaging. In many packaging techniques, each has its own technical advantages. What I am talking about is a modified atmosphere packaging technique used in food packaging machines.

When food packaging machines are used, modified atmosphere packaging, as a food packaging technique, has a long history. As early as the 1930 s, Europe and the United States began to discuss the use of CO2 gas to store meat products. In the 1950 s, N2 and CO2 gases were developed to replace the air in canned beef and cheese cans, which effectively extended the shelf life. In the 1960 s, due to the development of various airtight plastic packaging materials, many foods such as meat, fruits, vegetables, cakes, tea and dairy products have successfully selected gas replacement packaging techniques. In the 1970 s, the inflatable packaging of fresh meat was widely used in Europe and the United States. Since then, modified atmosphere packaging has flourished all over the world. It can be said that the modified atmosphere packaging technology is very capable in the use of food packaging machines, and it is very common in modern food packaging occupations.

Fresh-keeping atmosphere packaging is also known as MAP or CAP in foreign countries, and modified atmosphere packaging or replacement gas packaging and inflatable packaging in China. It is to use packaging materials with gas isolation function to package food. According to the theoretical requirements of customers, a certain share of O2 CO2 N2,N2 CO2,O2 CO2 mixed gas is filled into the package to prevent food from falling in quality or slowing down the speed of falling in quality in physical, chemical, biological and other aspects, thus extending the shelf life of food and improving the value of food.

Three kinds of common use of modified atmosphere packaging:

The use of CO2 in food packaging

China has studied the successful use of nano technology, efficient catalytic CO2 composition of degradable plastics. Even if the catalyst for preparing plastic with CO2 is "destroyed" to the nanoscale, the polymerization of catalytic molecules and CO2 is completed, so that about 130 grams of CO2 per gram of catalyst is catalyzed to form a new packaging material containing 42% CO2. As a good degradation of environmental protection materials, the use of a broad vision.

2. The use of nitrogen in food packaging

Nitrogen (N2) is the ideal inert gas, in food packaging has a unique effect: not with the food from the chemical reaction and not absorbed by food, can reduce the oxygen content in the package, greatly suppress the growth and reproduction of bacteria, mold and other microorganisms, slow down the oxidation of food and decay, so that food preservation. Nitrogen-filled packaged food can also prevent the kneading and crushing of food, food bonding or shrinking into a ball, and adhere to the advantages of food such as shape, dry, crisp, color and fragrance. Today, nitrogen-filled packaging is rapidly replacing traditional vacuum packaging, and has been used in fried potato chips and French fries, oil cooking food, etc. By consumers, especially children, young people like, nitrogen packaging is expected to be used in more food packaging.

3, the use of composite gas in packaging food.

Composite modified atmosphere fresh-keeping packaging is known as MAP packaging in the world. The modified atmosphere fresh-keeping gas used is usually composed of CO2, N2, O2 and a few special gases. CO2 can suppress the growth and reproduction of most aerobic spoilage bacteria and molds. O2 suppresses the growth and reproduction of most anaerobic spoilage bacteria. Adhere to the color of fresh meat and maintain the oxygen-enriched respiration and freshness of novel fruits and vegetables. N2 is used as filling gas. Composite gas composition ratio according to the food variety, preservation request and packaging materials to stop the appropriate choice and arrived in the packaging of food preservation quality is high, nutrient composition adhere to good, can really reach the original character, delay the role of preservation shelf life. Composite modified atmosphere packaging has been widely used at home and abroad.

With the rapid development of science and technology, commodity packaging has become an important means to promote selling and strengthen competitiveness. Many new techniques, new processes, and new ideas have been used in packaging planning, packaging technology, packaging equipment, new packaging materials, and new packaging industries. Packaging planning has entered the era of computerization, a kind of planning method suitable for the replacement of fast with the help of computers and various information systems has been presented. Today's planners need to have the fundamental skills of packaging planning, but also to be able to think, watch and understand ideas, while computer skills are based on the aforementioned skills. Packaging planners also need to know the relevant packaging manufacturing process, how to select materials, how to use modern packaging manufacturing equipment, such as pre-press process equipment, post-press disposal equipment, etc. Not only is the packaging planning towards computerization, the use of packaging techniques in packaging machines has also been separated from computers. This is also an important trend in the development of packaging machines today. In the future, there will be more integration of techniques, and the advantages brought by computers will only get better and better.

The molding of packaging includes the molding of metal packaging, the molding of plastic packaging, the molding of paper packaging, and the molding of other composite packaging. Many different materials of packaging molding has been with the help of air pressure, impact, wet treatment, vacuum technology to complete the process of simplification and scientific.