Sodium carbonate plays a certain role in papermaking and pulping. In the process of chemical pulping, it is necessary to use sodium carbonate as a buffer to dissolve lignin, thus dispersing cellulose into pulping.

The principle of papermaking:

Papermaking production is divided into two basic processes: pulping and papermaking. Pulping is to dissociate plant fiber raw materials into natural pulp or bleached pulp by mechanical method, chemical method or a combination of the two. Papermaking is to combine pulp fibers suspended in water into sheets that meet various requirements through various processes.

Extended data:

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, and then 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. Handmade paper is superior to machine-made paper in toughness and tension.

References:

Baidu encyclopedia-papermaking