Li rejected the American's purchase request. He pays more attention to the significance of this technology to China, because it is "the eighth cow hide fiber in the world", which has achieved a zero breakthrough in the history of man-made fiber invention in China.
1977 resigned as the captain of the production team and started to go out to start a business. By 1990, after 10 years of primitive accumulation, Li's net worth has reached tens of millions of yuan.
199 1 Li saw a translation in Chemical Abstracts that "soybean protein in soybean meal can be extracted and spun into cloth", which aroused his great interest. According to his own words, "I immediately calculated the cost and profit of producing soybean fiber with my fingers, which felt much better than developing feed equipment."
R&D involves knowledge of chemistry and physics. After graduating from high school, he bought many books to teach himself. I couldn't understand many letters and symbols, so I bought various dictionaries and other reference books to look them up and groped my way forward bit by bit. I invested all my savings, but I still failed again and again. His family who had supported him advised him to give up. He didn't listen and ran to Puyang, 50 kilometers away from home, to do experiments. It is rare to go home once a year.
200 1, heavily in debt, spent more than 30 million, tried more than 800 times before and after, and finally succeeded.
In September 2003, he was invited to attend the World Man-made Fiber Conference held in Austria. Soy protein fiber is recognized as "the eighth kind of bovine staple fiber in the world", which has officially entered the history of the invention of man-made fiber, making China the only country in the world that can industrially produce soybean fiber for textile. In 65438+February of the same year, Li won the gold medal of invention patent of the World Intellectual Property Organization and the gold medal of invention patent of China Intellectual Property Office.
After getting the patent certificate, Li didn't stop there, so he tried to make it into a product. He said that soybean fiber is mainly extracted from soybean meal, which belongs to comprehensive utilization of waste, and its cost is also low, only one-third of that of silk and one-fifth of that of cashmere, so it has broad prospects.
In 2005, the production line of soybean fiber high-grade underwear founded by him with an annual output of 6.5438+0.2 million pieces (sets) was completed and put into production in Huaxian County, and the end products were put on the market in an all-round way, which caused a sensation in the world.
But he is not satisfied with this. Since 2002, he has also chosen a project to study and develop the properties of soybean fiber, and successfully made it have anti-ultraviolet function, antibacterial and bacteriostatic function and negative oxygen ion function, so as to diversify the end products.