He was greatly inspired by the fact that food sealed in glass containers would not go bad if heated properly. Therefore, Appel responded to the government's reward and specially studied the method of preserving food.
The spoilage of food is often the result of microbial activities and reproduction in food properties, which promotes the decomposition of food. Canned food is a kind of food that can be preserved for a long time after processing, sealing and sterilization. If the sealing performance of the container is poor, the sterilized food will be contaminated by microorganisms again, causing corruption and deterioration.
Therefore, the container must have very good sealing performance, to ensure that the food can be isolated from the outside air after disinfection and sterilization, to prevent the pollution of external microorganisms without deterioration, and to ensure that the food can be preserved for a long time without deterioration.
Extended data:
The origin of canned food
The earliest cans were made of glass bottles, and the bottle mouth was tightly plugged with cork and iron wire. /kloc-at the end of 0/8, French general Napoleon led an army to attack in all directions. Because the front line is too long, a lot of food will rot and deteriorate after being transported to the front line. He hoped to solve the problem of grain storage in the war March, so he offered a huge reward of 12000 francs. If someone can invent the technology and equipment to prevent food from going bad, he will get this huge reward.
Many French scientists have been trying to think about this problem. At that time, there was a chef named Appert Nicolas (1749- 184 1) who worked as a worker in sauerkraut factory, winery, candy store and restaurant. When selling fruit pulp, wine and other foods, he found that some often go bad, and some are not easy to go bad.
He also happened to find that food sealed in glass containers would not go bad if heated properly, which greatly inspired him. Therefore, Appel responded to the government's reward and specially studied the method of preserving food.
After ten years of hard research, he finally succeeded 1804. He processed the food, put it in a jar, put it all in a boiling pot, heated it for 30-60 minutes, stuffed it with a cork while it was hot, and then reinforced it with thread or sealed it with wax. This technology was disclosed after 18 10 was patented. In this way, food can be preserved for a long time without spoilage. This is the embryonic form of modern canned food.
Appel received a bonus from Napoleon and opened a factory to provide food for the French army.
Shortly after Appel's glass jar came out, British businessman Peter Duran developed a tin jar made of thin iron, which was patented in Britain and later obtained by Hall, gamble and Tang Jin. It is the ancestor of the commonly used tin can.
1862, French biologist pasteur published a paper pointing out that food corruption is caused by bacteria. Therefore, the cannery adopts steam sterilization technology to make canned food reach the standard of absolute sterility. Today's aluminum foil packaging cans were born in the United States in the 20th century.
References:
Baidu encyclopedia-canned food