Canned food is to meet the requirements of raw materials by processing, deployment, canning, sealing, sterilization, cooling, or sterile containers, to meet the requirements of commercial sterilization, at room temperature can be long-term preservation of food. The technology of canned food has two key features: sealing and sterilization.
The earliest cans are used glass bottles with cork and wire tightly stuffed with a bottle. At the end of the 18th century, the French general Napoleon rate army expeditions Quartet, the front too long, a large number of food transport to the front line will rot, he hopes to solve the march to war when the grain problem, so he offered a huge 12000 francs, if there is invented to prevent the spoilage of food technology and equipment, this huge sum of money awarded him.
France, many scientists therefore contemplated that a chef called Nicolas Appert (Nicolas Appert, 1749-1841, worked in sauerkraut factory, distillery, candy shops and restaurants when workers. He was selling fruit paste, wine and other food, found that some tend to go bad, and some are not volatile. He also found that the food in the glass container, if properly heated, it is not easy to deteriorate, he was a great inspiration from. Then, Appel responded to the public offering, specialized research on the method of food preservation.
After ten years of hard study, he finally succeeded in 1804. He the food handling, and then into wide mouth bottle, all placed in boiling water pot, heating after 30-60 minutes. Serve hot with cork plugged, and then wire reinforcement or sealed with wax, this technology in 1810 patented open to the public. This approach will be able to preserve food for a long time without spoilage. This is the prototype of modern canned food.
Appel won the Napoleon prize, but also opened a factory, to provide food for the French army. Shortly after the advent of Apel glass cans, the Englishman Peter Durand (Peter Durand) developed a tin pot made of thin Yangtie. And in Britain obtained the patent. The patent was later made Hall (Hall), gamber (Gamble) and Donkin (Donkin). As the ancestor of the commonly used iron cans.
In 1862, Pasteur, a French biologist, published a paper to illustrate that food spoilage is caused by bacteria. As a result, the canning factory uses the steam sterilization technology, causes the canned food to achieve the standard of the absolute sterility. Today's aluminum foil packaging cans were born in the United States in twentieth Century.
However, not packed in sealed containers for the food are referred to as canned food, such as bottled fermented bean curd, ketchup, honey, canned milk, Coca Cola and other are not part of the canned food. Canned food has a long shelf life, easy to eat, safety, health, nutrition, health and other characteristics. The invention of canned food now has a history of nearly more than and 200 years, the technology is mature, the consumer market all over the world. China canned food industry began in New China establishment initial period, from the Korean War to at the beginning of the reform and opening up, China's export and economic construction made important contributions. At present, China has become the world's leading producer and exporter of canned food, canned food is still the main export processed foods in our country.
Market is rumoured to canned food with preservatives, to achieve the effect of long-term storage actually canned food after sealing packing, after strict sterilization technology to commercial sterilization can make destroy bacteria in foods is in a vacuum state, the block external pollution into, anti anti bacteria to breed again, under the condition of normal temperature preservation and will not degenerate. Therefore, canned food is no need to add preservatives!
|
Comment on loading...
|
|
