High-beating-degree cotton pulp product used for banknote paper and production method thereof

Abstract

The invention provides a production method of a high-beating-degree cotton pulp product used for banknote paper, comprising the following steps: a) breaking and opening cotton linter; b) boiling and blanching, wherein, the alkali matching temperature is the normal temperature, the oven-dry amount of the matched alkali relative to the cotton linter is 0.5-4%; the oven-dry amount of hydrogen peroxide relative to the cotton linter is 0.5-5%; the matched alkali liquid ratio is 1:3-5; the relative oven-dry amount of oxygen bleaching stabilizer is 0.1-0.5%; and the relative oven-dry amount of penetrating agent is 0.5-0.9%; c) pulping and removing sands: 1) Holland pulping, wherein the current is 140A-160A, 2) fine fibering, wherein the pulping current is 150A-160A, 3) pulping again, and the pulping current is 300A-350A, 4) jordaning, and 5) removing the sands; and d) pulping. In the invention, low-temperature, low-alkali, boiling and leaching integrated pulping is adopted without chlorine, the boiling and leaching effects is improved by adding the oxygen leaching stabilizer and the penetrating agent assistant; and the produced cotton pulp has high beating degree, good strength, high folding endurance, and can be used for producing the banknote paper.

Description

technical field [0001] The invention relates to the field of cotton pulp production, in particular to a high beating degree cotton pulp product for banknote paper and a production method thereof. Background technique [0002] Paper for banknotes is a special paper with smooth and delicate texture, tough and fold-resistant, crisp and flat, and high whiteness. In recent years, in the international market, the output of combing machine noil used to manufacture euros, pounds and various anti-counterfeiting papers has gradually decreased, and the development of various blended fibers has reduced the number of pure combing machine noils. Now cotton linters are used instead of comber noil to produce cotton pulp. [0003] my country's cotton planting area and annual output are the first in the world, so the cotton linters are rich in resources, and the quality grade of cotton linters is mostly hand-picked, with less impurities and high quality grades. It is the only way in the fut...

AI Technical Summary

Problems solved by technology

[0005] However, in the international market, most cotton pulp products are cotton pulp for viscose fiber. The production process adopts high-temperature, high-pressure, and high-alkali cooking conditions, and the added value of the product is low. During the production process, the waste water has high COD content and high treatment costs. , the beating degree of the prepared cotton pulp is generally 14SR~20SR