Definition
Pregelatinised starch is a simple to process and versatile modified starch, which can be applied by simply making a paste with cold water, eliminating the need for heating and pasting. It is widely used in many industries such as medicine, food, cosmetics, feed, oil drilling, metal casting, textile and paper making.
Gelling principle
Starch granules at the right temperature (the temperature required for various sources of starch varies, generally 60-80°C) are swollen in water, splitting and forming a homogeneous paste solution called pasting. The essence of pasting is that the hydrogen bonds between the ordered and disordered (crystalline and amorphous) starch molecules in the starch granules are broken and dispersed in water to form a colloidal solution.