In the era of material shortage, canned goods used to be popular goods and high-end food. Nowadays, the status of canned goods is not as high as it used to be, but people sometimes misunderstand canned goods.

 

 

 

The definition of canned food in GB7098-2015 is as follows: commercial aseptic canned food is processed from fruits, vegetables, edible fungi, livestock, poultry, aquatic animals and other raw materials through processing, canning, sealing, heating and sterilization. According to Lin Taohui, secretary-general of the Canned Food Science and Technology Working Committee of China Food Industry Association, canned food can be understood as canned food, which is heated and sterilized after sealed packaging and reaches commercial sterility. According to this definition, besides tinplate tins and glass cans in narrow sense, many processed foods packed with composite aluminum foil, high barrier plastic packaging materials and composite paper packaging materials belong to canned food. Lin Taohui said that this definition of canned food does not specify the characteristics of content, so whether it is paste, soup or homogenized liquid beverage, as long as it is in accordance with this definition of packaged food, it is canned food.

 

 

 

To understand canned food, you also need to know the concept of "commercial sterility". Also GB7098-2015, the concept of "commercial aseptic" is defined as: canned food after moderate heat sterilization does not contain pathogenic microorganisms, nor does it contain non-pathogenic microorganisms that can reproduce at normal temperatures. Lin Taohui explained: "Generally speaking, canned food will not deteriorate during the shelf life at room temperature, but not all packaged food that will not deteriorate during the shelf life at room temperature belongs to canned food. There are a large number of processed food, although it is also sterilized by heat, because food preservatives are added to protect it. There will be no spoilage during the quality period. This kind of processed food can not be called canned food. Therefore, judging whether canned food is canned depends on whether preservatives such as sodium sorbate or sodium benzoate are added. All canned food with preservatives is not canned food, because canned food does not need to add preservatives at all.