A high-quality paper web papermaking process

Abstract

The invention provides a high-quality paper web papermaking technology. The technical problems that in the slurry dehydrating process, filler is lost and the remaining force is poor are solved. Compared with a traditional papermaking technology, before papermaking slurry is sprayed to a forming mesh, by adding a filtering process, a filter net is used for filtering the papermaking slurry, thick and long fibers are filtered out, the consistency of the thickness and length degree is ensured, then, the number of meshes in the forming mesh can be decreased, excessive filler losses are avoided, meanwhile, by adding the defoaming process, water and filler contained in the filter net are used for smearing the forming mesh before papermaking, bubbles on the forming mesh are removed, and a layer of filler is smeared on the forming net in advance so as to improve the quality of formed paper sheets.

Description

technical field [0001] The invention relates to the field of base paper forming in the papermaking process, in particular to a high-quality paper web papermaking process. Background technique [0002] Slurry used in papermaking is a complex, heterogeneous compound of fibers, fine fibers, fillers, and other additives, all of which have constantly changing properties, which can cause confusion during processing. The main part of the raw material is not turned into paper when it is first passed through the production line, but the raw material is dewatered on the forming wire, but the dewatering process causes fine fibers and fillers to be lost through the forming wire along with the moisture, At least less staying power. [0003] In addition, since the sources of fibers and fine fibers used in papermaking are generally certain fiber raw materials such as hardwood pulp, recycled fiber or agricultural fiber, and these fiber raw materials are more or less heterogeneous, the fibe...

AI Technical Summary

Problems solved by technology

[0002] Slurry used in papermaking is a complex, heterogeneous compound of fibers, fine fibers, fillers, and other additives, all of which have constantly changing properties, which can cause confusion during processing. The main part of the raw material is not turned into paper when it is first passed through the production line, but the raw material is dewatered on the forming wire, but the dewatering process causes fine fibers and fillers to be lost through the forming wire along with the moisture, Poor retention at least

[0003] In addition, since the sources of fibers and fine fibers used in papermaking are generally certain fiber raw materials such as hardwood pulp, recycled fiber or agricultural fiber, and these fiber raw materials are more or less heterogeneous, the fibers contained in them are The degree of thickness is different, directly used on the forming screen, it will easily lead to the reduction of paper quality after forming

[0004] In U.S. Patent Application No. 4,781,793, a method of improving paper properties, especially paper retention, is disclosed, in which the basic stock is separated into two separate fractions based on fiber length, and according to the specific purpose to process the fibers in each component, but it does not disclose the corresponding papermaking machinery or papermaking system and papermaking process

Images