The main function of vacuum packaging in the food industry is to remove oxygen and prevent food deterioration. The cooked food vacuum packaging machine is widely used, because the cooked food produced in the factory invests a large amount of raw materials for mass production at one time, and the shelf life needs to be extended. Speaking of the shelf life, consider the means to extend the shelf life, such as high-temperature cooking, etc., all require vacuum packaging!
The principle of vacuum packaging is also relatively simple, because the mildew and deterioration of food are mainly caused by the activities of microorganisms. Most microorganisms (such as molds and yeasts) need oxygen to survive. Vacuum packaging uses this principle to combine packaging bags and food cells. The oxygen in the air is pumped away, causing the microorganisms to lose their "living environment".
The main work of the food vacuum packaging machine is to extend the shelf life and storage effect of the packaged food by vacuuming the vacuum bag. Different packaging has different requirements for vacuum. For some products with strict air requirements, high-power vacuum pumps are required to remove air.
But sometimes the vacuum-packaged food we buy will have "bag-blowing" phenomenon, which is related to the vacuum degree of the packaging. Cheap vacuum packaging machines often fail to meet the vacuum requirements. The vacuum degree of ordinary commercial vacuum packaging machine is 600-50PA, and the price of supporting vacuum pump ranges from tens to tens of thousands of yuan. Of course, the shelf life of products packaged by a small vacuum packaging machine of several thousand yuan is different from that of a large vacuum packaging machine of hundreds of thousands.
The vacuum degree of the vacuum packaging machine is determined by the vacuum pump. Gongcai.com learned that there are currently three types of vacuum pumps on the market, including domestic pumps, joint venture pumps and imported pumps. There is no difference in the use of these three pumps, but they are very different in details. The biggest difference is the so-called extreme vacuum, which is particularly important for food companies, because different foods have different requirements for vacuum.
