The history of rubber O-rings

In 1736, French scientist Kang Damin brought back detailed information about rubber trees from Peru, and published the "Travel in South America". The book details the origin of rubber trees, the method of collecting latex, and the use of rubber, which caused people's Value. In 1763, the French Mecca invented a solvent capable of softening rubber. In 1888, the British Deng Lu invented the air tire, and in 1895 the production of automobiles began. The rise of the automobile industry further stimulated the huge demand for rubber, and the price of rubber soared. In 1897, the Singapore Botanical Garden Director Huang Dele invented the continuous tapping method of rubber trees, which greatly increased the rubber output. As a result, wild rubber trees have become an important economic crop cultivated in large areas. In 1493, the great Spanish explorer Columbus led his team to the South American continent for the first time. Here, the Spaniards saw Indian children and youths playing a game, singing songs and throwing a small ball at each other. Such a ball can rebound very high after landing, and it feels sticky when pinched And has a smoky smell. The Spaniards also saw that the Indians applied some thick white liquids to their clothes, and they were not rainproof when they were wearing them in rainy days; they also applied this white thick liquid to their feet, and the rainy water would not wet their feet . As a result, the Spaniards initially learned about the elasticity and water resistance of rubber, but did not really understand the source of rubber. In 1693, French scientist Lacan arrived in South America and saw the indigenous people play this kind of ball. Scientists and soldiers have different thinking and vision. After investigating such a ball, they learned that this kind of ball is a kind of chop. The thick liquid that Indians call "rubber" is made out of thick liquid. In 1876, the British Weikhan died nine lives, collected 70,000 rubber seeds from the tropical jungles of the Amazon River, sent them to the Royal Kew Botanical Gardens in London, England, and then transported the rubber seedlings to Singapore, Sri Lanka, Malaysia, and West Asia to plant and succeed. By 2004, the world has successfully cultivated natural rubber for 128 years. In 1904, the Qiang Toast Sword Anren of Qianya (now Yingjiang County), Yunnan, China purchased 8,000 rubber seedlings from Singapore and brought them back to China for planting at Phoenix Mountain, Yingcheng County, Yunnan Province at 24 ° north latitude.