The principle of popcorn

Rice will swell into popcorn, which is actually the function of temperature and pressure. In a sealed container, the internal air volume is constant, and when the temperature rises, the pressure in the container will increase. So is the iron stove of the popcorn machine. When the iron furnace is heated, the air pressure in the furnace seal gradually increases;

At the same time, the rice in the furnace is also affected by high temperature, and the water inside the rice is gradually evaporated and released, and it is constantly accumulating in the furnace. With the increase of temperature, the pressure in the furnace is getting bigger and bigger.

Under the action of high pressure, the evaporation of water in rice is blocked, and the remaining water in rice is also in a state of rising temperature and pressure, making rice grains like balloons filled with air. Rice grains under high temperature and high pressure suddenly come into contact with low pressure environment, and the water in the rice grains suddenly expands to form popcorn.

Extended data:

Historical source

Popcorn is an ancient puffed food. Hundreds of years ago, before European immigrants moved to this "new world", Indians living on this continent began to eat popcorn.

After Columbus returned to Europe, he described the vivid scene of Indian children in the "New World" selling popcorn in the street wearing necklaces. It was also the Indians who taught European immigrants how to grow and bake corn.

Because popcorn is easy to get wet, it will lose its crisp and delicious flavor after getting wet, so it is not easy to keep popcorn for too long, so it should be eaten fresh. If you want to store it, be sure to put it in a ventilated and dry place to prevent it from getting wet.