Puffing is the powdered material (starch and protein) by hydrothermal or without quenching after quenching, fed to the puffing machine, under the action of mechanical force, heating, pressurization, and then die hole, and suddenly Antihypertensive, the rapid evaporation of water molecules, so that material expansion, into the porous particles Servo material technology. Puffing feed is the full price with the characteristics of floating, semi-submerged and subsidence produced through a series of processing technologies such as raw material micro-grinding, ingredients, mixing, puffing, pelletizing, drying, spraying, cooling, screening, packaging and so on feed. The main problems with puffing feed are the high depreciation expense caused by investment in production equipment, the high temperature and high pressure loss of heat-sensitive nutrients, the need for drying of particles to increase the energy consumption, and the cost of packing and shipping is relatively hard. Higher, but it has incomparable advantages of other words and phrases:

(1) elimination of anti-nutritional factors, improve feed digestibility. There are many anti-nutritional factors in feed ingredients, such as saponin, gossypol, trypsin inhibitor and so on in raw materials such as rapeseed, soybean meal and cottonseed meal, etc. Under certain water and temperature, these anti-nutritional factors Puffing process gradually lost some activity, thereby reducing the destruction of endogenous digestive enzymes in the animal body, improve the feed digestion and absorption rate, reduce excretion.

(2) high-temperature sterilization, to ensure the safety and health of the material. Extruded the maximum temperature up to 150 ° C or so, Servo material in the role of high temperature time is very short, about 8 seconds. Raw materials by high temperature, high pressure puffed feed can make a variety of microorganisms, eggs, pathogens are killed, improve the quality of Serve materials, reduce animal diseases of the digestive tract.

(3) improve product palatability and flavor. Puffed product structure loose, porous, crisp, and has good palatability and flavor. Templates can be made of different shapes die hole, it can suppress different shapes, animal favorite extruded pellets. But also produce special high-fat feed, such as Atlantic salmon, rainbow trout and other cultured species of high fat feed, some up to 30%.

(4) improve starch gelatinization, is conducive to the digestion and absorption of starch. The study found that the extrudate can be expected to feed starch gelatinization degree from 13.58% to 81.55%, the higher the degree of puffing, the more vulnerable to full use of the enzyme. The plant material is subjected to high temperature and high pressure in the puffing process to gelatinize and proteinize the starch, which is good for animal digestion and absorption and improves the digestibility and utilization rate of the lexical material. Aquatic feed material by puffing can increase the digestibility of 10% to 35%.

(5) improve the digest rate of material absorption. Fish digestive tract is shorter, most of which belong to no stomach fish, so the finer the higher the rate of food digestion and absorption. Puffing process requires pulverization of raw materials to be more detailed, thereby enhancing the digestion and absorption of fish. Currently in the production of high-grade seawater fish and other extruded materials, raw materials are more than 95% of the fineness of the crushing, grass carp, tilapia and catfish and other common varieties of raw materials crushed raw material should have reached more than 95% 60 mesh.

(6) puffed lexicon conducive to preservation, which is conducive to aquaculture management. Due to high temperature and high pressure puffing, and drying treatment, the finished product moisture generally requires less than 10.0%. Packaging generally used inside and outside the bag separate sealing, so under the same conditions, longer shelf life, easy storage.

(7) Expanded feed water, strong stability, 16 to 32 hours without collapse, water pollution is small. Quality loose, porous puff floating material floating on the surface of the water easy to observe the feeding of fish, growth, which is conducive to scientific management; and high fat, dense puffed sinking material, water stability of more than 16 hours to ensure that fish Full feeding, reduce waste.