For extruded snack food machinery is also used to extrude food a kind of equipment, but in the process of extruding, there are many factors that will affect the food factors, resulting in the quality of extruded food is different, what factors affect the quality of extruded food? Let’s take you to understand the factors that affect the quality of snack food.

For the drying of food: the moisture content of the product directly affects the size of the expansion degree of the product. Therefore, the control of dry moisture content is very important. If the moisture content of the dried product is too much, when frying puffed, it is difficult to discharge the water in a short period of time, resulting in puffed products, soft taste, not crisp, and destroyed the characteristics of the product. If the moisture content is too low, it is difficult to form enough jet steam to expand the food tissue in a short time during frying, and it will also reduce the puffing degree of the product.

Then gelatinization: starch granules at the appropriate temperature (60 ~ 80℃), dissolve in water, split, and form a uniform paste solution for gelatinization. Only the starch that is fully gelatinized but not disintegrated has a large number of intermolecular hydrogen chains broken, and fully absorbs water, which lays the foundation for the highly crystallization of the sediment particles in the next step of aging to contain water, thus laying the foundation for causing considerable expansion degree.

Finally, the aging of food: the puffed A-starch is placed at 2 to 4 ° C for 1.5 to 2 days to become opaque starch. In the aging process, the water absorbed during gelatinization is coated with the microcrystalline structure of starch, which causes the water in the starch micrograins to vaporize and spray out rapidly during high temperature frying, which makes the powder tissue expand and form a porous and loose structure to achieve the purpose of swelling.

There are many factors affecting the quality of leisure food, so in the production process, we should pay attention to the quality of production and precautions, in order to produce good quality puffed leisure food.

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