Application of flexible packaging in food packaging
Food packaging is the main object of the use of composite flexible packaging material. It has different requirements in great diversity. The contents are packaged from raw to cooked, from low temperature to high temperature, from high moisture content to dried food, from vacuum packaging to inflatable packaging, almost covering all applications of composite flexible packaging materials. The commonly used food packaging technology are as follows.
(1) Modified atmosphere packaging: By replacing the gas in the packaging, the food can achieve the purpose of quality preservation in the changed gas environment; It is a kind of sealed packaging that changes the gas environment, and uses a certain gas to achieve the purpose of quality preservation.
(2) Vacuum packaging: It is a packaging method that put the food into the air-tight packaging container or bag, and then the air in the bag is excluded, causing a certain vacuum, finally sealed sealing.
(3) Moisture-proof packaging: the use of moisture-proof materials with the ability to isolate water vapor to seal the product to isolate the influence of external humidity changes on the product, and make the relative humidity in the package to meet the requirements of the product, to protect the quality of the article.
(4) Sterilization packaging: for non-sterile packaging, chemical methods are generally not used. The main methods are pasteurization, hot packing sterilization, cooking sterilization, ultraviolet sterilization, microwave sterilization, radiation sterilization, ultra-low temperature sterilization.
(5) Light-resistant packaging: there are the following various structures: paper base, aluminum foil, aluminized film, colored film, full-plate printing film, the composite film composed of these opaque materials is the structure and composition of light-resistant packaging.
(6) Refrigerated and frozen packaging: It can reduce the moisture activity of food, thereby extending the freshness of food. It is an important means to keep food highly fresh.
(7) Aseptic packaging: A modern packaging technology in which pre-sterilized sterile food is packed into sterilized packaging material and sealed under aseptic conditions.
