We all know that there is a great guarantee for food packaging in the future with vacuum packaging. Various packaging skills continue to appear in the modern market, and the use of high technology provides a perfect talent foundation for the perfection of food packaging. In many packaging skills, each has its own technical advantages. The following is a modified atmosphere packaging technology used in food packaging machines.
When the food packaging machine is used, modified atmosphere packaging is a kind of food packaging technology. It has a long history. As early as the 1930s, Europe and the United States began to study the use of CO2 gas to preserve meat products; in the 1950s, the study and development of N2 and CO2 Gas replaces the air in canned beef and cheese cans, which effectively extends the shelf life; in the 1960s, due to the development of various air-tight plastic packaging materials, many foods such as meat, fruits, vegetables, cakes, tea and dairy products have been successfully developed. The gas replacement packaging technology was selected; in the 1970s, the inflatable packaging of fresh meat was widely used in Europe and the United States. Since then, the modified atmosphere packaging has been flourishing all over the world. It can be said that the modified atmosphere packaging skills are very sophisticated in the use of food packaging machines and are very common in modern food packaging occupations.
Modified atmosphere packaging is also called MAP or CAP abroad, and domestically, it is called modified atmosphere packaging or replacement gas packaging and inflatable packaging. It uses packaging materials with gas isolation function to package food. According to the practical needs of customers, a certain share of O2+CO2+N2, N2+CO2, O2+CO2 mixed gas is filled into the package to prevent food from physics, chemistry, biology, etc. Quality decline or slow down the rate of quality decline, thereby extending the shelf life of food and increasing the value of food.
Three common applications of modified atmosphere packaging:
1. The application of CO2 in food packaging
my country has studied the successful use of nanotechnology to efficiently catalyze CO2 to form degradable plastics. That is, the catalyst that uses CO2 to make plastic is “destroyed” to the nanometer level to complete the polymerization of catalytic molecules and CO2, so that each gram of catalyst can catalyze about 130 grams of CO2, forming new packaging materials containing 42% CO2. As an environmentally friendly material with excellent degradability, it has a wide application prospect.
2. The use of nitrogen in food packaging
Nitrogen (N2) is an ideal inert gas. It has special effects in food packaging: it does not react chemically with food and is not absorbed by food. It can reduce the oxygen content in the packaging and greatly inhibit the growth and reproduction of bacteria, molds and other microorganisms. , To slow down the oxidation and decay of food, so as to keep food fresh. Nitrogen-filled packaged food can also prevent the food from kneading and breaking, food sticking or shrinking, and sticking to the advantages of the food’s shape, dryness, crispness, color, and flavor. Nitrogen-filled packaging is rapidly replacing traditional vacuum packaging, and has been used in fried potato chips and French fries, oil-cooked food, etc. Favored by consumers, especially children and young people, nitrogen-filled packaging is expected to be used in more food packaging.
3. Application of compound gas in packaged food
Compound modified atmosphere preservation packaging is collectively referred to as MAP packaging internationally. The modified atmosphere preservation gas used is generally composed of CO2, N2, O2 and a few special gases. CO2 can inhibit the growth and reproduction of most aerobic erosive bacteria and molds; O2 can inhibit the growth and reproduction of most anaerobic erosive bacteria; maintain the color of fresh flesh and maintain the oxygen-rich respiration and freshness of fresh fruits and vegetables; N2 is used as filling gas. The compound gas composition ratio is appropriately selected according to the type of food, preservation requirements and packaging materials to achieve the effect of high preservation quality of packaged food, good nutrition content, can reach the original characteristics, and delay the shelf life of preservation. Compound modified atmosphere packaging has been widely used at home and abroad.
With the rapid development of scientific skills, commodity packaging has become an important method to promote sales and enhance competitiveness. Many new skills, new processes, and new ideas have been applied to packaging planning, packaging technology, packaging equipment, new packaging materials, new packaging industries, etc. Packaging planning has entered the age of computerization, and a planning method that is suitable for rapid updating and reliance on computers and various information systems has emerged. Today’s planners need to have the basic skills of packaging planning, but also to consider, appreciate, and understand ideas. Computer skills are based on the aforementioned skills. Packaging planners also need to know the relevant packaging manufacturing process, how to select materials, and how to use modern packaging manufacturing equipment, such as pre-press process equipment, post-press processing equipment, etc. Not only is packaging planning moving towards computerization, the application of packaging skills in packaging machines has also been combined with computers. This is also an important trend in the development of packaging machine professions. In the future, more skills will be integrated. The resulting advantages will only get better.
Packaging molding includes the molding of metal packaging, plastic packaging, paper packaging and other composite material packaging. Many packaging molding materials of different materials have been simplified and scientifically completed with the help of air pressure, impact, wet processing, and vacuum skills.