Pregelatinized starch production methods

According to the expansion principle, the wet starch prepared beforehand is added into the extruder. The starch is heated and gelatinized by screw shaft friction extrusion. Then the starch is extruded under high pressure through small holes with pore diameter of 1-10 mm. As soon as the material enters the atmosphere, it expands and dries instantaneously. After crushing and screening, the pre-gelatinized starch is obtained. Because there is no need to add water in the manufacturing process, the temperature can be maintained at 120 - 160 C with internal friction heat, and no heat source is needed for drying.