Making Pregelatinized Starch with Twin Screw Food Extruder

Do you know what plants are high in starch?

Starch-rich, mainly carbohydrate-rich foods, and root vegetables. For example: rice, corn, wheat, root vegetables include: potatoes, cassava, yams, etc.

In addition to being the main component of human food, starch is also an important industrial raw material.

On the basis of natural starch, in order to improve the properties of starch and expand the scope of application, physical, chemical or enzymatic treatment can be used to change the properties of starch to varying degrees.

At present, pregelatinized starch is widely used in industry, which has the advantages of convenient use, environmental protection, and high economic benefits. As a pure natural green plant adhesive, it has broad market prospects in food, medical, agriculture, metal casting, papermaking, petroleum, building materials and other industries. It is prepared and applied in combination with the needs of different industries, and has a great impact on the development of many industries. are of great significance.

The traditional production methods of pregelatinized starch include roller method, spray method and hot rolling method. With the popularization of screw extrusion technology in food processing, due to the characteristics of continuous production, low energy consumption and low investment, screw extrusion is used. The production of pregelatinized starch has become one of the important ways. The screw extrusion method can produce various modified starches by adjusting the raw materials.

Production process:
The starch is first mixed with a certain amount of water, and then introduced into the extruder. Through the shearing of the screw, high temperature and high pressure, it is released through the die hole of the extruder, so that the starch is instantly expanded, and then dried and pulverized. Gelatinized starch.

In the whole production process, only a small amount of water needs to be added, and the internal friction heat can be used to maintain the temperature of 120-160 ° C. It is recognized as one of the most economical preparation methods for pregelatinized starch. The produced pregelatinized starch can be formed into a paste only by adding cold water, and the price is low, and it has the characteristics of regeneration. It also has the advantages of non-toxic, odorless and degradable during use. good market prospects.