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Anti-myopia paper and its preparation method and application

A technology of short-sighted paper and white paper, which is applied in the field of pulp and papermaking engineering, can solve the problems of reduced strength, smoothness, and sizing of recycled paper, and achieve reduced visual fatigue, less human eye irritation, and less surface absorption Effect

Active Publication Date: 2021-07-27
广州市咏润纸业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, when waste paper is used to prepare office cultural paper, the deinked pulp of waste paper such as recycled office paper, offset books, and bookbinding paper is generally used as the main raw material, and a certain proportion of wood pulp, straw pulp, Raw plant pulp such as hemp pulp or bamboo pulp and / or adding a large number of additives to solve the problem of reduced strength, smoothness, and sizing of recycled paper

Method used

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  • Anti-myopia paper and its preparation method and application
  • Anti-myopia paper and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation of embodiment 1 waste book paper deinking pulp

[0039] (1) Add hot water, NaOH with 1.4-1.6% of the weight of waste book paper, and NaOH with 3%-3.5% of the weight of waste paper paper in the pulper. 2 SiO 3 , waste book paper weight 0.2% ~ 0.25% H 2 o 2 Pulping with waste book paper, the slurry concentration is controlled at 4.5-5.5%, the temperature is controlled at 50-60°C, and the pulping time is 50 minutes to obtain waste book pulp;

[0040] (2) Screening, purifying, flotation and beating the waste book pulp in sequence to obtain deinked waste book paper pulp.

[0041] For the deinked pulp of waste book paper prepared in Example 1, the beating concentration is controlled at 2.8-3.2%, and the beating degree (knocking degree) is controlled at 38-42°SR.

Embodiment 2

[0042] The preparation of embodiment 2 anti-myopia paper

[0043] (1) After the white paper edge is beaten, the white paper edge pulp with a beating concentration controlled at 2.8 to 3.2% and a beating degree controlled at 38 to 42 ° SR is obtained, and the waste book paper deinked pulp obtained in Example 1 is obtained by The mass ratio is 4:1 mixed to obtain mixed pulp;

[0044] (2) Dilute the mixed pulp with water to a pulp concentration of 2.5%, add direct frozen yellow G to the pulp in an amount of 0.9-1.1kg / t paper and add alkali in an amount of 1.7-2.1kg / t paper Brilliant Yellow O, toning the slurry to obtain a light yellow slurry, which is made by paper machine to obtain anti-myopia paper.

[0045] The anti-myopia paper prepared in this embodiment is light yellow, with a hue of 40-60 degrees, a saturation of 20-60%, and a brightness of 65-85%. The main performance indicators of the anti-myopia paper of this embodiment include: quantitatively 55 ± 2g / m 2 , the longitu...

Embodiment 3

[0046] The preparation of embodiment 3 anti-myopia paper

[0047] (1) After the white paper edge is beaten, the white paper edge pulp with a beating concentration controlled at 2.8 to 3.2% and a beating degree controlled at 38 to 42 ° SR is obtained, and the waste book paper deinked pulp obtained in Example 1 is obtained by The mass ratio is 3:1 mixed to obtain mixed pulp;

[0048] (2) Dilute the mixed pulp with water to a pulp concentration of 2.4%, add direct frozen yellow G to the pulp in an amount of 0.9-1.1kg / t paper and add alkali in an amount of 1.7-2.1kg / t paper Brilliant Yellow O, toning the slurry to obtain a light yellow slurry, which is made by paper machine to obtain anti-myopia paper.

[0049] The anti-myopia paper prepared in this embodiment is light yellow, with a hue of 40-60 degrees, a saturation of 20-60%, and a brightness of 65-85%. The main performance indicators of the anti-myopia paper of this embodiment include: quantitatively 60 ± 2g / m 2 , the longi...

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Abstract

The invention discloses an anti-myopia paper, which is prepared by using slurry and pigments as preparation raw materials, wherein the slurry is composed of 75-85% of deinked pulp of waste book paper and 15-25% of white paper edge pulp by weight percentage ; The pigment is one or more of direct frozen yellow G, basic bright yellow O and basic green. The anti-myopia paper of the present invention is pale yellow or light green, has a soft color, is less irritating to human eyes, can reduce visual fatigue, has a certain protective effect on the eyes, and has the effect of preventing myopia; at the same time, the anti-myopia paper of the present invention uses waste The two types of waste paper, book paper and white paper edges, are prepared as the main raw materials, making full use of secondary fibers, and does not require additional additives other than pigments, which can significantly reduce production costs and reduce environmental impact. In addition, the anti-myopia writing paper of the present invention has high tensile index, tear index, smoothness and sizing degree, small surface absorption, good mechanical properties, surface properties and water resistance, and smooth writing.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking engineering, and in particular relates to an anti-myopia paper and a preparation method thereof. Background technique [0002] The ordinary paper that people use every day is mostly white, and white is a full-frequency spectrum with a high reflection coefficient, which has a relatively obvious contrast with black fonts, and is more irritating to human eyes. People who use and watch white paper for a long time will easily cause eye fatigue. After a long time, they will easily form functional accommodation myopia (pseudo-myopia), which will cause damage to the eyes. On the market at present, especially on the student book and the teaching material market, there is a need for a kind of book that has a certain protective effect on the eyes of students and can prevent myopia, book paper. [0003] The anti-myopia paper can reflect a specific spectrum color light, which matches with othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/02D21H15/10D21H11/14D21H17/07D21H17/11
CPCD21C5/025D21C5/027D21H11/14D21H15/10D21H17/07D21H17/11Y02W30/64
Inventor 何凤飞
Owner 广州市咏润纸业科技有限公司
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