Principle of self-heating rice heating package

The heating package of self-heating rice is based on the principle of automatic heating when it meets water. The heating bag contains magnesium and zinc in total, which can be heated automatically after being mixed with water. There is quicklime (calcium oxide) in it, and a lot of heat will be generated in the process of adding water, which will heat the rice.

The processing of self-heating rice is based on gelatinization and retrogradation of starch. More than 70% of rice is starch. When heated to a certain temperature, starch will be gelatinized (matured) and denatured, and the degree of starch gelatinization is mainly controlled by moisture and temperature.

Extended data

Self-heating rice, the oldest and most successful industrialized food, first appeared during World War II, when it was mainly used as military rations. However, the convenience food with rice as the main material in China is rare in the market, both in variety and quantity.

At present, domestic self-heating rice is mostly dry instant rice with semi-dry or dry side dishes in plastic bowls. The quality of some products in our country is controlled by manufacturers according to their own enterprise standards. Without national standards, the production quality is difficult to guarantee.

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