Puffing is a method of food processing. It consists of putting the processed food in a closed container, heat it up and pressurize it, and suddenly reduce the pressure. The water in the food will vaporize and expand, so that many small holes will appear in the food, which will become crispy and swell. food. The basic principle is to let the raw material suddenly decompress under heated and pressurized conditions so that it expands..
As a new type of food processing technology, inflation technology began in 1910 and was applied to pet foods in the United States in the 1990s. 1950. In the early days of the United States, the extrusion principle was used to produce pet food, that is to say, using the extruder. The screw and screw sleeve heat and pressurize the raw material as it is extruded, and extrude the high temperature and high. press the food out of the mold cavity and perform the rapid process of volume expansion due to sudden decompression.
The main purpose of cat food adopting the puffing process is to:
1. Improve palatability of pet food.
2. Change or improve the nutritional value of pet food.
3. Improve the digestion of food and the absorption rate of pets.
4. Change the shape and structure of pet food to make it easier for them to eat.
5. Change the content of different nutritional indicators of pet food, such as: reduce water content to increase feed shelf life, which is beneficial for storage.
6. Change the bulk density of food, extrude pellets and briquettes to increase the bulk density of foods.
7. Kills all types of mold, salmonella and other harmful substances and improves the safety and sanitation of pet food.
In pet and dog food processing technology, the extrusion process has been widely used in recent years, especially after entering the decade of 1980, has rapidly developed into dry pet food, semi-dry pet food and snacks. Technology has vastly improved palatability, The nutrition, digestion and absorption, sanitation and safety, transport, storage and other aspects of pet food, and has a decisive positive importance.
