Now what are the raw materials for papermaking, and what are the raw materials used in papermaking i

Plant fibers: **Waste paper, etc.

The raw materials used in papermaking generally include plant fibers and mineral fibers. Plant fiber: Plant fiber is a filament or flocculent formed by the combination of cellulose and various nutrients, which has the functions of supporting, connecting, wrapping, and filling plants, and is widely found in plant stems, roots, fruits, and husks.

Mineral fibers: Mineral fibers are widely used in the paper industry. Some of its excellent properties can make paper have functions that plant fibers do not have.

The raw materials used in papermaking generally include plant fibers and mineral fibers.

1. Plant fiber: Plant fiber is a filament or flocculent formed by the combination of cellulose and various nutrients, which has the functions of supporting, connecting, wrapping, filling and other functions for plants, and is widely found in plant stems, roots, fruits, and husks.

2. Mineral fibers: Mineral fibers are widely used in the paper industry. Some of its excellent properties can make paper have functions that plant fibers do not have.

Papermaking is one of the four great inventions in China, and paper is a sheet fiber product used for writing, printing, painting or packaging. Generally, it is made of the water suspension of plant fibers that have been pulped and staggered on the Internet, preliminarily dehydrated, and then compressed and dried.

In the early days of the invention of papermaking, the main raw materials for papermaking were tree bark and rags. At that time, the rags were mainly hemp fibers, and the varieties were mainly ramie and cotton linen. It is said that China's cotton was introduced from India at the same time as Buddhism in the early Eastern Han Dynasty, and was used for textile in the later period.

The bark used at that time was mainly sandalwood and bark (i.e., bark). By the early years of the Western Han Dynasty in the 2nd century BC at the latest, paper had been introduced in China. The original paper is made of hemp skin fiber or hemp fabric, because the papermaking technology is still in the early stage, the process is simple, the paper made is rough texture, with more unloosened fiber bundles, the surface is not smooth, not suitable for writing, generally only used for packaging.

The modern papermaking process can be divided into the main steps such as pulping, modulation, copying, and processing.

1. The process of pulping.

Pulp making is the first step in papermaking, and there are generally three methods to convert wood into pulp, including Huixiao mechanical pulping method, chemical pulping method and semi-chemical pulping method.

2. Modulation process.

The modulation of paper stock is another key point of papermaking, and the strength, tone, printability, and length of paper shelf life are directly related to it after the paper is completed. The common modulation process can be roughly divided into the following three steps: a

Loose slurry bPulp CGluing and filling.

3. Copying process.

The main work of the papermaking department is to make the thin paper stock evenly interwoven and dehydrated, and then dry, calender, roll the paper, cut, sort and package.