Method of making paper by machinery

Abstract

The invention relates to the technical field of papermaking, in particular to a method of making paper by machinery, comprising the steps of adding component A, which is composed of diethylene triaminepentaacetic acid, sodium dodecyl sulfate and modified chitosan, after the step of pulping of plant fiber materials and before the step of bleaching; adding component B, which is composed of vegetablemulti-gum, pyrethrin, additive plant extracts and modified dialdehyde starch, before the step of applying gum during preparation. The method has the advantages that influence of metal ions upon pulpbleaching can be relieved effectively, fibers gain good swelling, and paper is easier to dry; grain issue can be relieved, and paper strength is improved; the ability of paper sheets to resist permeation of hydrated liquids is improved, and the paper sheets are given good antibacterial and insect-preventing effects; the components added herein are nontoxic and harmless, and therefore, the paper isgood in safety and environmental friendliness and has high practical value and good application prospect.

Description

technical field [0001] The invention relates to the technical field of modern papermaking, in particular to a method for machine-made paper. Background technique [0002] Papermaking is an important invention of the working people in ancient China. There are two forms of mechanism and manual. The mechanism is carried out continuously on the paper machine. The pulp suitable for paper quality is diluted with water to a certain concentration, and is initially dehydrated in the wire part of the paper machine to form a wet paper sheet, which is then dehydrated by pressing, and then dried into paper. [0003] On the one hand, because handmade paper is beaten manually, the fibers in the pulp are well preserved and the fibers of handmade paper can be arranged in various directions evenly; machine-made paper is beaten by machines, and the pulp fibers are broken. The longitudinal and horizontal distribution of fibers is uneven. For example, during wet mechanical papermaking, the fib...

AI Technical Summary

Problems solved by technology

[0004] On the other hand, the catalytic decomposition of metal ions in the existing papermaking process to hydrogen peroxide and hypochlorous acid bleaching agents affects the bleaching effect, and such as Fe 3+ The ions react with the phenolic groups in the pulp to form a deep-colored compound, which will reduce the whiteness of the pulp and increase the degree of yellowing of the pulp. Scaling of system equipment and pipelines, these metal ions cannot be effectively removed in the existing adding machine, the adsorption effect is not strong, and it is easy to cause secondary pollution

[0005] In addition, the application of sealing and packaging paper in the market is very extensive, but the sealing and packaging paper with anti-moth and moisture-proof functions are currently blank in the market, which greatly limits the choice of materials for many packaging products. The lack of effect will easily cause irreparable losses