Puffed dog food
Expanded dog food is a type of pet food that is produced through an expanded manufacturing process among the many grain foods available for pets.
The significance of the puffed dog food process The processing of dog food mainly refers to the use of a variety of different means and methods of molding a variety of raw materials or a single raw material, so as to form a pet nutritious, palatable and digestive and absorptive properties have been maximized to improve, in order to give play to the maximum potential nutritional value and the value of the use of the process.
The processing range of pet food dog food is very wide, including pet leisure food, snacks, teeth cleansing sticks, knotted bones, pressed bones, nutrients (liquid), concentrated dog food powder, dry food, wet food, semi-dry food, canned food and so on. In order to maximize its nutritional functionality, different forms of processing of its different raw materials to different degrees.
Expanded dog food processing is basically divided into physical method, chemical method, microbiological method of three categories, the physical method mainly refers to the raw materials by extrusion, heating, crushing, bonding, etc.; chemical method for the denaturation of starch, protein degradation, etc.; microbiological method refers to a certain kind of raw materials for fermentation. Here on the physical method of puffing process for a brief introduction: first of all, we understand the concept of puffing in dog food processing, puffing is a food processing method, is to be processed into the food in a closed container, heating and pressurization after a sudden decompression, the water in the food vaporization and expansion, so that the food appears in a number of small holes, become crunchy, and become puffed food. The basic principle is to let the raw materials in the heating, pressurization suddenly decompression and make it expand. Expansion technology as a new type of food processing technology, began in 1910, the application of pet food in the 1950s in the United States, the United States first began to use the principle of extrusion to produce and manufacture pet food, that is, the use of extruders within the screw and screw sleeve through the extrusion of raw materials to make it warm, pressurized, and high temperature and high pressure of the food extrusion mold empty, due to the sudden decompression of the volume of the volume of the rapid expansion of the process. The process. The main purpose of the manufacturing method of dog food adopting the puffing process is: 1, to improve the palatability of pet food; 2, to change or improve the nutritional value of pet food; 3, to improve the pet's digestion and absorption rate of the food; 4, to change the shape and structure of the pet food, so that it is easy for pets to eat; 5, to change the content of different nutritional indicators of the pet food, such as: reduce the moisture in order to increase the shelf-life of the food production, and is conducive to storage; 6, to change the weight of the food, so that the food will have a better shelf life, is conducive to storage 6, change the weight of the food, extrusion pelleting, briquetting to increase the weight density of the food; 7, kill a variety of molds, salmonella and other harmful substances to improve the safety and hygiene of pet food;
Based on the above purposes, the following two different expansion methods in the dog food expansion process we analyze and compare, the use of screw extrusion expansion can be divided into two kinds, one is the dry expansion method, the second is the wet expansion method.
Dry puffing in the production process in the need to add water to the raw materials, raw materials in the puffing bin before entering the pre-conditioning treatment, the heat generated in the puffing process all by the raw materials in the role of mechanical extrusion through the screw, shear plate and puffing cavity. The difference between wet and dry puffing is that the raw material is pre-conditioned before entering the puffing, and is pre-cooked by steam or water to raise the temperature. The so-called modulation refers to the pet food raw materials through the steam heat and humidity, so that the raw material in the starch pre-pasteurization, protein denaturation, softening of raw materials, which is conducive to improving the effect of dog food puffing granulation and improve the quality of puffing. In the dog food wet puffing process, pre-modulation technology has a very important significance: 1, to improve the capacity of puffing granulation, through pre-modulation by steam on the raw materials in advance of the wet heat reaction, the raw material to achieve softening, more conducive to the molding, and at the same time reduces the wear and tear of raw materials on the machinery; 2, through pre-modulation to improve the bulk density of the particles, reduce the rate of dust, reduce the loss of the dog food processing and Maintain the health of the production environment; 3, to promote starch pasting and protein denaturation, improve the pet's digestion and absorption of food, according to the data, when after the steam conditioning, starch pasting rate can reach 35% to 45%, and not after the steam pre-conditioning starch pasting rate of only 15%; 4, more thoroughly kill harmful bacteria, in the pre-conditioning process of high-temperature steam can kill most of the E. coli and Salmonella, greatly improving the quality of the dog food. Salmonella, greatly improving the safety and health standards of pet food dog food; 5, through the tempering technology, can be convenient for liquid nutritional raw materials to add, improve and increase the nutrients of pet food; at the same time, wet puffing method also has a puffing granulation effect, puffing rate is stable and so on, in the process of dog food processing, the wet puffing method and the pre-conditioning technology has a fairly important role and Significance. But compared to the dry method of expansion method, there are expensive equipment, high equipment requirements, equipment handling cumbersome defects. In accordance with the method of tempering, that is, the above mentioned dry method and wet method of expansion method, according to the expansion of the screw structure of the equipment to points, can be divided into single-screw extrusion method and twin-screw extrusion method of expansion of two kinds. Jinan Shengrun puffing machinery Co., Ltd. since the introduction of advanced technology in 2008, there are a variety of dog food production equipment models and models.
Single-screw extrusion expansion process is relatively simple, the scope of application is quite wide, can be used for high moisture content, fat content of up to 17% or more of the product, while the starch paste degree can reach 90% or more. Twin-screw extrusion method compared to single-screw extrusion method, equipment and structure is relatively complex, but has a stable performance of puffing, high product yield, high production efficiency, after puffing the product is basically sterile and many other advantages. In the processing of pet food dog food extrusion process has been widely used in recent years, especially after entering the 1980s, in the pet's dry food, semi-dry food, pet leisure food has been the rapid development of extrusion process of pet food palatability, nutrition, digestion and absorption, health and safety, transportation, storage, etc. have been a big change, with a pivotal Positive significance.
