It was recently discovered that Central Americans (including Aztecs, Olmecs and Mayans) were making rubber 3000 years ago (although they didn't call it that). Mixing the milky white juice of the local Brazilian rubber tree (later called quasi-rubber tree) with the juice of the morning glory vine can create a very strong solid. Civilization uses this ancient rubber for various purposes, from sandals to balls to jewelry. In fact, although Charles goodyear is generally regarded as the inventor of vulcanized rubber (a rubber compound that was made more durable and non-sticky by adding sulfur and heat), it seems that the Aztecs only changed the proportion of ingredients (between latex and morning glory juice), resulting in different changes in strength.
When Spanish explorers arrived in South America in the16th century, they found that this elastic and plastic sap had many uses. The French explorer Charles de la Camming called it "natural rubber" when he "discovered" the French word 17 in the 1940s, but it is a variant of the southern gum word. When trying to figure out what this is, Kang Daming came to a wrong conclusion-he thought it was concentrated resin oil. 1770, the famous British chemist joseph priestley (who also discovered oxygen) noticed that this latex material would directly rub pencil marks on paper, so he invented rubber and gave this "friction material" a name. By the end of 18, this material will always be called "rubber". 18 19, Thomas Hancock, an Englishman, and his brothers engaged in the business of stagecoach together. He tried to find a better way to keep customers dry when traveling. He turned to rubber and developed elastic and waterproof suspenders, gloves, shoes and socks. He was fascinated by this material and started mass production, but he soon realized that he produced a lot of waste rubber in the production process. So Hancock invented his "pickling machine" (later called chewing machine) to tear the remaining rubber into pieces. Then, he mashed the malleable rubber together to make a new solid block, and put it into the mold to design anything he wanted. One of his original designs was a belt made of rubber, although he never sold it and didn't realize the practicality of rubber bands. In addition, vulcanization has not been discovered (we will discuss it later), so these belts will become quite soft in hot days and quite hard in cold days. In short, these rubber bands are not very practical at this stage of the game, because many types of rubber bands will be used later. Hancock didn't apply for a patent for his machine or the rubber fragments it produced, but wanted to keep the manufacturing process completely confidential. This will be a considerable mistake in the end.
By 182 1, Hancock had perfected his machine, although he would keep it secret for about ten years in an attempt to dominate the market. In fact, that's why he called it a "salting machine" to get rid of everyone's smell. It worked. Hancock turned rubber into a commercial practical product, and he dominated the market for the next 20 years. 1833,
Charles Goodyear went to prison for debt and began to experiment with Indian rubber. A few years later, after he was released from prison, Goodyear discovered his vulcanizing agent, which was a solution. As an employee of Pennsylvania Railroad Company, he knows where to buy spare rubber parts and discarded inner tubes-Goodyear Rubber Company is also located in Akron. He cut these pieces into circles and began to wrap the newspaper with these tapes. They worked very well. Akron Lighthouse magazine bought Spencer's rubber bands and made them themselves. Later, he began to sell rubber bands to office supplies, paper products and twine shops in this area, while continuing to work for the Pennsylvania Railway Company (more than ten years) and establishing his own business.
Spencer also co-founded the first rubber band factory, followed by a second factory in Hot Springs, Arkansas on 1944. 1957, he designed and applied for the patent of the union rubber band, and finally established the world rubber band standard. Today, Alliance Rubber is the largest rubber band manufacturer in the world, producing more than 654.38+04 million pounds of rubber bands every year.
So, the next time you shoot a friend with this little rubber band device, you can thank Maya, Charles Dera Kangdamin, Thomas Hancock, Charles Goodyear and William Spencer for making simple but very useful rubber bands.
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Why are the tires black instead of white now? What does crayons have to do with switches? An unwanted invention has become one of the best-selling office products in history. The invention of paper clips, plants that inspired Velcro, and the invention of scotch tape are politically incorrect. People call them extended reference biographies-Charles Goodyear-biography of the Library of Congress-Thomas Hancock-Aztec of the Library of Congress. Maya is a master of rubber manufacturing? National Geographic William H. Spencer Invented Rubber Band Cincinnati Inquirer Stephen Perry Hot Springs Alliance Rubber Company is the largest rubber band manufacturer in the United States-Arkansas Times Rubber Times. V. 7-8 (1920-21). –––– Thomas Hancock, digital library of Hathi Trust–* * Charles Marie de la Condomin–the first scientist in the Amazon rubber world, volume 6 1-62, Edited by John Robertson Dunlap, edited by Henry Clemens Pearson (1858-1936) The Hancocks of Marlborough: rubber, Art and the industrial revolution–a … edited by John Loadman, Francis James Rubber Band-* * Goodyear-MIT news many years ago The rubber industry in ancient Central America-* * The history of rubber bands and rubber bands-The birth of natural rubber bands-The scientific lens when rubber bands were invented-The World Health Organization-The British Rubber Band Guardian-The Library of Congress made rubber bands UK PatentNo.13880 (/.