Pulping process pulp for the first step in the papermaking, - the general method of converting wood into pulp are mechanical pulp method, chemical pulp method and semi-chemical pulp method and so on three.
2. Modulation process paper modulation for the papermaking of the other - focus, paper after the completion of the strength, tone, printing. Brush the advantages and disadvantages of the paper, the length of the preservation period directly related to it.
Generally common modulation process can be roughly divided into the following three steps: a. Bulk pulp b. Pulping c. Add glue and filling
3. copying process paper copying department's main work for the thin paper material, so that it is uniformly interwoven and dehydrated.
Then by drying, calendering, rolling paper, cutting, selection, packaging, so a - the general common process is as follows:
a. Paper material screening will be modulated paper material and then diluted to a lower concentration, and through the screening equipment, and again to screen out debris and
Through the screening equipment, the paper is screened again to remove the debris and undissociated fiber bundles to maintain the quality and protect the equipment.
b. Mesh section. The paper flows out of the headbox on a circulating copper or plastic wire mesh. and evenly distributed and interwoven.
c. Pressing section leads the wet paper removed from the screen to two rolls with a woolen cloth.
and woolen cloth, the wet paper will be further dehydrated, and make the paper quality more compact, in order to improve the paper surface, increase strengthen.
d. Drying section due to the wet paper after the press, its moisture content is still as high as 52-70%, at this time can no longer mechanical force to remove the water, so the wet paper is allowed to pass through many cylinders with hot steam inside the surface to dry the paper. Drying.
e. Calendering Because the moisture content of the wet paper after pressing is still as high as 52-70%, it is no longer possible to use mechanical force to remove the moisture.
The mechanical force can no longer be used to remove the water, so the wet paper is allowed to pass through the surface of many cylinders with hot steam inside to dry the paper. Drying.
f. The moisture content of the wet paper after pressing is still as high as 52 - 70%, and it is no longer possible to use mechanical force to remove the moisture.
The mechanical force can no longer be used to remove the water, so the wet paper is allowed to pass through a number of circular surfaces with hot steam inside to dry the paper. Dry.
g. Cutting, selection and packaging: take the front has been rolled into a tube of paper rolls, cut into a sheet of paper with a paper cutting machine.
The paper, and then by manual or mechanical selection, to remove the damaged or stained paper, and finally every 500 sheets will be packaged into a A packet (usually called a order).