2. Shandong Huatai Paper Co., Ltd.
3. Shandong Bohui Paper Co., Ltd.
4. nine dragons paper (Holdings) Limited
5. Shandong Sun Paper Company Limited.
Papermaking is an important invention of working people in ancient China. There are two forms: mechanical and manual. The mechanism is continuous on the paper machine. The paper pulp suitable for paper quality is diluted to a certain concentration with water, and is preliminarily dewatered in the wire section of a paper machine to form a wet paper sheet, then dewatered by pressing, and then dried into paper.
Manually use a frame with bamboo curtain, polyester net or copper net to copy the fibers dispersed and suspended in water into wet paper pages, press and dehydrate them, and then dry or dry them into paper.
The biggest difference between machine-made paper and hand-made paper is that because hand-made paper is artificially beaten, the fibers in pulp are well preserved; Machine-made paper is beaten by machine and pulp fibers are broken. So that handmade paper is much better than machine-made paper in toughness and tension. Because of the poor pulp speed, the fiber distribution in machine-made paper is uneven in both vertical and horizontal directions, while the fiber distribution ratio in manual paper is not uneven, especially in calligraphy and painting paper.
Paper is the most commonly used item in our daily life. Whether reading, reading newspapers, writing or drawing, we all have to touch paper. Paper is also indispensable in the production of industry, agriculture and national defense industry.
Today, there is no paper, which is unimaginable. Paper is a powerful tool and material for exchanging ideas, spreading culture, developing science and technology and production. Looking back at history, this important substance was invented by the working people in ancient China.
Papermaking, together with compass, gunpowder and printing, is called the four great inventions of ancient science and technology in China, and it is an outstanding contribution made by the people of China to the development of world science and culture.
Paper is a sheet fiber product used for writing, printing, painting or packaging. Generally, it is made from the aqueous suspension of plant fibers through pulping, staggered combination on the net, preliminary dehydration, compression and drying. China was the first country in the world to invent paper. According to archaeological findings, in the Western Han Dynasty (206 BC-8 AD), China already had hemp fiber paper.