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History of the Plastic Bag

Author:Jinxiu plastic Release time: Hot:19

The history of the plastic bag The ancestor of this wonder material was the richer cellulose found in plants. In 1845, a chemist living in Basel, northwest Switzerland, accidentally encountered concentrated sulfuric acid and nitric acid on a table while doing experiments at home. He quickly picked up his wife's cloth apron to wipe the mixed acid on the table. After a flurry of activity, he hung his apron over the stove to dry it. Unexpectedly, the apron burst into flames and was reduced to ashes in an instant. Senber returned to the lab with this "big discovery," and the "accident" kept repeating itself. After a number of experiments, Senber finally found the reason: the original cloth apron is the main component of cellulose, which contact with the mixture of concentrated nitric acid and concentrated sulfuric acid, to produce cellulose nitrate lipid, which is later widely used nitro fiber. Senber discovered that nitrocellulose was malleable, and that the products made from it were impermeable to water. He took great interest in making some beautiful bowls, cups, bottles and teapots out of it. He was so pleased with his work that he wrote a letter to his good friend, the famous scientist Faraday, about his unexpected success. But Faraday didn't care until a photographer showed up. [1] Photographer Alexander Parks has many hobbies. Photography is one of them. In the 19th century, people could not buy ready-made photographic film and chemicals as they do today. They often had to make what they needed themselves. So every photographer must also be a chemist. One of the materials used in the photography is collodion, which is a "nitrocotton" solution, a nitrate cellulose solution in alcohol and ether. It was used to glue light-sensitive chemicals onto glass to make the equivalent of photographic film today. In the 1850s, Parks looked at different ways of treating collodion. One day, he tried mixing collodion with camphor. To his surprise, the mixture produced a hard, flexible material. Parks called the substance "paxine," an early form of plastic. Parks has used Paxine to make all kinds of objects: combs, pens, buttons and jewelry prints. Parks, however, had little business sense and had lost money on his own ventures. In the 20th century, people began to find new uses for plastic. Almost everything in a home can be made of some kind of plastic. It was left to other inventors to develop Parks' work and profit from it. John Wesley Hyatt, a printer from New York, saw an opportunity in 1868, when a company making billiards complained of a shortage of ivory. Hyatt improved the manufacturing process and gave the paxine a new name -- "celluloid." He got a ready market from billiard ball manufacturers and was soon making a variety of products out of plastic. Early plastics caught fire easily, limiting the range of products that could be made from them. The first plastic to successfully withstand high temperatures was Becklet. Leo Baekeland received the patent in 1909. Bakelite was first synthesized by Baekeland in the United States in 1909. In the 1930s, nylon was introduced, described as "a composite of coal, air, and water, thinner than spider silk, stronger than steel, and superior to silk". Their appearance laid the foundation for the invention and production of all kinds of plastics. Due to the development of the petrochemical industry during World War II, the raw material of plastics replaced coal with petroleum, and the plastics manufacturing industry also got rapid development. Plastic is a very light substance that can be softened by heating it at a very low temperature and can be made into any shape you wish. Plastic products are bright in color, light in weight, not afraid of falling, economical and durable. Its appearance not only brings a lot of convenience to people's life, but also greatly promotes the development of industry. However, if plastics were invented less than 100 years ago and people were overjoyed by their birth, they are now struggling to deal with a substance that is so pervasive in our lives that it poses a great threat to our environment. Plastics are chemical petroleum products extracted from petroleum or coal that are difficult to break down naturally once produced. Plastics will not rot and degrade in the ground for 200 years. A large amount of plastic waste buried underground will destroy the permeability of the soil, harden the soil and affect the growth of plants. Deaths can also result from digestive tract obstruction if livestock ingest plastic mixed with feed or left in the wild.

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