As we all know, the invention of paper is one of China's four great inventions and has a long history in China. So far, in some remote places, ancient papermaking is still circulating. And it has been sought after by some hobbyists.

In 105 AD, Cai Lun summarized the use of hemp fiber in papermaking since the Western Han Dynasty, using bark, hemp, rags, old fishing nets and other raw materials to improve the papermaking process, marking the beginning of the paper machine.

Around the eighteenth century, papermaking technology has been further developed in Europe. It has been further improved and developed from the Netherlands, France, and the United Kingdom, and developed into the familiar paper machine concept, Fourdrinier paper machine and cylinder paper machine.

After nearly two hundred years of development, at the beginning of the 20th century, the paper machine has become a large-scale, high-yield industrial machine.

Since the 1950s, papermaking machinery has seen more development and innovation. For example, vertical continuous digesters, displacement scrubbers, hot rolling mills, new pressure screens, slag removers, etc. appeared in pulping equipment. In the paper machine, there are new types of pulp boxes, nets, laminating machines, polyester forming nets and so on. There are many types of technologies.

After the 1960s, the controllable DC motor speed control system began to be widely used in paper machines. Electronic technology was used to detect, control and record the parameters of the papermaking process, such as the speed, concentration, temperature and flow rate of the machine. Thickness etc. By the 1980s, large vertical continuous digesters could produce more than 1,000 tons of pulp per day. The width of the paper is up to 10 meters, the speed is more than 1000 meters per minute, and the daily output exceeds 500 tons.

Up to now, the performance of paper machine technology has been further improved with the development of science and technology. The maximum daily output is close to 2,000 tons, and the year-on-year data have doubled.However, with the development of energy saving, environmental protection, and new technologies, the future development direction of paper machines will be large-scale, highly intelligent, and high-utilization. The pursuit of quality and efficiency is believed to further improve the performance of paper machines. development of.