Diapers were originally designed for astronauts to urinate in space, and were later converted to civilian use. This can easily lead to misunderstandings. In China, people equate diapers with diapers. In fact, before diapers, diapers had come a long way. The first people to try diaper substitutes were the Japanese. The reason was simple. During World War II, Japan was short of natural materials. The person who took a substantial step was the Swede Boris Sturm. In 1942, he invented a two-piece diaper, with an outer layer of plastic pants and an inner layer of absorbent pads made of paper. This kind of disposable diapers are easy to break and the crumbs will get all over the child's buttocks, so they have not been widely used for a long time. In 1961, Pampers, a diaper named one of the 100 greatest inventions of the 20th century by Time magazine, was launched by Procter & Gamble. There is a little story that P&G developed diapers because the R&D manager had a granddaughter and was annoyed by frequent diaper changes, so he determined to invent something that did not need to be washed to replace diapers. So how did the astronauts pee at this time? On April 12, 1961, Gagarin, mankind's first space hero, had an episode before going into space. When he was about to step into the launch module, Gagarin suddenly felt an urgent need to urinate. He had no choice but to Get down, lean on the wheels of a car, and drain the urine along the tubes of your space suit. On May 5, 1961, Shepard, the first American astronaut in space, also encountered the problem of urgent urination. The commander ordered him to urinate in his space suit. This was a risk because the heat of the urine might cause The equipment in the space suit that must be kept cool fails. Fortunately, the urine cooled quickly and the tragedy did not happen. It was not until the 1980s that a Chinese engineer named Tang Xinyuan of NASA improved the spacesuit, added polymer absorbers, and invented a diaper that can absorb 1,400 ml of water. Peeing no longer became a problem for astronauts. A big problem.