Can Vacuum Packaging Extend The Shelf Life Of Food?

Usually we talk about extending the shelf life of food, everyone will have a misunderstanding, I feel that as long as vacuum packaging can extend the shelf life, is this really true?

The fact is that there are many factors that cause food spoilage, mainly chemical, biochemical and microbiological factors, of which microorganisms play a leading role. After vacuum sealing, the bag is kept under high decompression state, and the air is rare, which is equivalent to the hypoxia effect, so that the microorganisms have no living conditions, so as to achieve the purpose of fresh food and no disease rot. However, generally cooked foods have a large moisture content, are rich in nutrients, and are highly susceptible to bacteria. If they are not sterilized after vacuum packaging, the shelf life of the food is hardly prolonged, but it is different after sterilization by a high-temperature sterilization steam generator.

After vacuum packaging, the product will still have bacteria in the bag, so it must be sterilized. The sterilization can be divided into several forms. Some cooked food sterilization temperature does not need to exceed 100 ° C, but some food sterilization temperature must be 100 ° C. Above, so you can choose high temperature sterilization equipment, temperature and pressure can be adjusted, according to the requirements to adjust low temperature steam or high temperature and high pressure steam, this sterilization form to adapt to various process needs.

Some people have done similar experiments and found that if there is no sterilization, some foods will accelerate the rate of corruption after vacuum packaging, but if vacuum packaging, take sterilization measures, according to different requirements, high temperature sterilization equipment can effectively extend the shelf life of vacuum packaged foods, From 15 days to 360 days. If the milk product is vacuum-packed and steam-sterilized, it can be stored at room temperature within 15 days. The smoked chicken products can be stored for 6-12 months or even longer after vacuum packaging. If you want to extend the shelf life of your food, you must kill the microorganisms or inhibit their growth and reproduction. That is to say, sterilization is a must. Therefore, the premise that vacuum packaging can extend the shelf life of food is that it must be sterilized.