This is the production process of printing paper

推薦連結:成人英語課程 一對一

Papermaking is one of the four great inventions of China and the crystallization of the wisdom of the ancient Chinese people. After Cai Lun's improvement of papermaking, it will further promote the wide application of papermaking and make people's life more convenient. Paper has become a part of people's life to make up for or lack of lessons. Today, the double offset paper we use for printing is also called how to make forest paper.

Papermaking scene in ancient times

Taking a paper mill in Shandong Province, whose model is 1760 paper machine, which mainly produces high white double offset paper as an example, we need raw materials first, The main raw materials for papermaking are plant fiber, commonly known as pulp, which can be roughly divided into the following categories: wood pulp, straw pulp, sugarcane pulp, cotton pulp, recycled paper products, etc., plus starch, pigment, whitening agent and other chemical raw materials, which are mixed in a certain proportion, heated at high temperature, grinded and screened, constitute the necessary products for papermaking to make pulp.

Paper making process part display

The pulp needs to pass through the headbox, web part, pressing part, drying cadre, calender, paper coiler, rewinder or paper cutter to form the materials that can be used for printing. The pulp is evenly sprayed to the web through the headbox to form the wet paper sheet of the size we want to produce, and the paper is pressed and shaped by the pressing part,

After drying the wet paper, the paper leaves are calendered by the calender. In order to make the paper more compatible and suitable for more printing factories, one calender, two calenders and three calenders can be used according to the needs, or non calendering can be selected. Calendering can improve the smoothness, glossiness and tightness of the paper pages, make the full width and thickness of the paper pages consistent and reduce the permeability Air quality: the more passes are calendered, the better the smoothness, glossiness, compactness and the consistency of the full width thickness of the paper. However, the thickness of the calendered paper will decrease correspondingly. Finally, the paper is rolled into a paper roll by the paper coiler, which completes the main process of paper making.

At this time, the paper can not be used by the printing machine, in order to adapt to the different printing machines

It is necessary to have a rewinder and a paper cutting machine at the back of the paper machine in the paper workshop. The rewinder is to cut and rewind the paper according to the size required by the printing machine to make the web paper of the size used for printing. Then the paper cutting machine is to cut the paper according to the size required

Cut flat paper, the industry is what we call flat paper, whether web or flat paper, can be adjusted according to the required size.

Finished web

The whole process is from raw materials, pulp to printing usable paper. I present the whole process of papermaking to you in the form of words in the most easy to understand form. Maybe you think it's not very complicated, but when you see the paper machine, you think it's a great and huge project.