Myopia-preventing paper and preparation method thereof

Abstract

The invention provides myopia-preventing paper and a preparation method thereof. The myopia-preventing paper is prepared from pulp and papermaking chemicals, wherein the pulp comprises the following raw materials by mass: 20-60 parts of softwood pulp, 1-40 parts of hardwood pulp and 10-70 parts of chemical-mechanical pulp, and per 100 parts by mass of the pulp are added with the following papermaking chemicals: 0.1-2.0 parts of wet-end cationic starch, 0.1-1.0 part of a retention aid, 0.01-5 parts of an internal sizing agent, 0.001-0.05 part of a dye and 10-50 parts of a filler. According to the invention, the color of paper conforms to the optimal optical range of myopia prevention while the paper has good strength, whiteness and smoothness, excessive additives do not need to be additionally added in the preparation method, broken paper pulp generated in the papermaking process and fibers in white water are fully utilized, emission of papermaking waste is reduced, and the cost of rawmaterials is reduced.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to an anti-myopia paper and a preparation method thereof. Background technique [0002] At present, the number of myopia patients in my country is as high as 600 million, which is almost half of the total population of China. The myopia rate of high school students and college students has exceeded 70%, and it is increasing year by year. The myopia rate of teenagers ranks first in the world, which has seriously threatened the national security of our country. At present, students in our country still generally use "white paper" with high whiteness. White paper can truly and objectively reflect all the colors of printed graphics and texts, and improve the contrast and clarity of text. If the paper is too white, it will increase the contrast of the color, and the second is that the reflected light is too strong, which will over-stimulate the optic nerve, cause visual ...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent document CN104611983B proposes a kind of straw or waste paper as raw material, after crushing, screening, fiber pulping and coloring, dehydration molding, the paper brightness is 50.8%, and the anti-myopia paper with a reflection wavelength of 510nm is produced. Paper produced from renewable resources has poor performance in terms of strength, smoothness, whiteness, and sizing, and is difficult to meet the requirements of high-grade writing paper, copy paper, printing paper, and other high-end office cultural papers; Chinese patent document CN105040514 aims to improve Paper strength indicators such as crack resistance, developed a myopia prevention paper added with basic bright yellow, benzidine yellow, titanium dioxide, realgar, polyacrylonitrile fiber, acrylamide copolymer, although to a certain extent made up for the strength, smoothness, Insufficient sizing, but too many additives increase the production cost and the difficulty of paper recycling and wastewater treatment in the later stage

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