Views: 0 Author: Site Editor Publish Time: 2022-08-08 Origin: Site
Paper is one of the four great inventions in ancient China. As early as 105 AD, Cai Lun summed up the use of hemp since the Western Han Dynasty.
Based on the experience of making paper with high quality fibers, the papermaking technique has been improved, and papermaking is made by using bark, hemp head, rags, old fishing nets, etc. as raw materials.
Papermaking was later introduced to Europe. By the beginning of the 18th century, the Dutch beater appeared, which changed the process of pounding and pulping, which was an important step in the mechanization of the papermaking process; in 1798, the French Robert Robert obtained a patent for a hand-operated endless wire paper machine, which was later passed through the United Kingdom. Funded by the Neil Brothers in Fu County, in 1803, British technician Don King improved and made a Fourdrinier paper machine that can continuously form paper, and successfully produced paper in 1805; in 1809, British Dickinson successfully trial-produced a rotary wire paper machine.
In terms of preparation pulping, in 1839, Pete in Germany began to use a cooking pot to cook shabby cotton cloth to make pulp; in 1843, Kler in Germany invented groundwood pulping by stripping wood fibers, which took ten years to improve by Furtel. In 1851, Burgers in the United Kingdom and Watt in the United States invented caustic soda wood pulping; in 1857, Tillman in the United States invented sulfite wood pulping technology; in 1884, German chemist Dahl invented sulfate wood pulping. technology. These inventions opened up the way to use wood as the main raw material for papermaking, and by the early 20th century, papermaking machinery had become a large-scale, high-yield industrial machine.