Writing paper capable of preventing myopia

A technology for preventing myopia and writing paper, which is applied in the directions of paper, paper making, paper making machine, etc., can solve the problems of undisclosed paper preparation methods, etc., and achieve the effects of outstanding dyeing effect, soft color and good stability

Inactive Publication Date: 2015-02-11
川印文化集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention only proposes a paper with a yellow appearance, and does not disclos

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1

[0015] Take 500kg of hardwood pulp and 600kg of softwood pulp to prepare mixed pulp, use alkaline bleaching process to bleach, disperse the pulp in a horizontal disperser to prepare a pulp with a concentration of 31wt%, and send it to the refiner at a speed of 1400r / min Refining for 40 minutes, adding 10g of basic bright yellow, 50g of basic orange, 8g of benzidine yellow G , 12g of direct frozen yellow G , 12g of titanium dioxide to obtain the slurry. The paper is prepared by conventional methods. The moisture content in the paper forming process When it is less than 7.6wt%, it is sent to a calender, pressed and dried to obtain finished paper.

Example Embodiment

[0016] Example 2

[0017] Take 600kg of hardwood pulp and 300kg of softwood pulp to prepare mixed pulp, use alkaline bleaching process to bleach, disperse the pulp in a horizontal disperser to prepare pulp with a concentration of 28wt%, and send it to the refiner at a speed of 1650r / min Refining for 38 minutes, adding 18g of Basic Bright Yellow, 39g of Basic Orange, 12g of Benzidine Yellow G , 20g of Direct Freeze Yellow G , and 21g of Titanium Dioxide to obtain a slurry. The paper is prepared by conventional methods. During the paper forming process, when the paper When the water content in it is lower than 7.0wt%, it is sent to a calender, pressed and dried to obtain finished paper.

Example Embodiment

[0018] Example 3

[0019] Take 600kg hardwood pulp and 600kg softwood pulp to prepare mixed pulp, use alkaline bleaching process to bleach, disperse the pulp in a horizontal disperser to prepare a pulp with a concentration of 32wt%, and send it to the refiner at a speed of 1200r / min Refining for 65 minutes, adding 21 g of basic bright yellow, 70 g of basic orange, 15 g of benzidine yellow G , 20 g of direct freezing yellow G , and 24 g of titanium dioxide to obtain a slurry. The paper is prepared by conventional methods. During the paper forming process, When the moisture in the paper is less than 8.6wt%, it is sent to the calender, pressed and dried to obtain the finished paper.

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PUM

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Abstract

The invention discloses a light-yellow writing paper capable of preventing myopia. The preparation method of the writing paper comprises the following steps: mixing hardwood slurry and softwood slurry according to a weight ratio of 1:0.5-1.3, bleaching the mixed slurry, dispersing the slurry, grinding the slurry, proportioning the slurry to obtain paper slurry, and finally moulding the paper slurry to obtain paper through a conventional method. During the slurry proportioning process, the following additives are added in percentage by the total weight of paper slurry: 0.001 to 0.002% of alkaline light yellow, 0.001 to 0.006% of alkaline orange, 0 to 0.001% of benzidine yellow, 0.001 to 0.002% of chrysophenine G, and 0.01% of titanium dioxide. The prepared writing paper has the following advantages: (1) the color of the paper surface is light yellow, the luster and color are soft, and the myopia can be effectively prevented; (2) the writing on the paper is fluent, the phenomenon of ink dispersion and fading is avoided, and the color is stable even after a long time preservation; (3) the growth of harmful bacteria on the paper is inhibited, and thus the health of users is guaranteed.

Description

technical field [0001] The invention relates to a writing paper, in particular to a light yellow writing paper capable of preventing myopia. Background technique [0002] According to reports, the incidence of myopia in Chinese teenagers is 50% to 60%, which is seriously higher than the international average compared with the global myopia rate of 22%. Among them, 28% are primary school students, 60% are junior high school students, and 85% are high school students, showing a high degree of correlation with school age. This is mainly due to the fact that middle school students are under great study pressure, face books for a long time every day, and use their eyes intensively. [0003] Usually, the homework books used by students are printed on white paper, and the homework books have high brightness. Students need to pay attention to the words on the paper with high reflective intensity for a long time during the writing process. In this case, the students have a lot of v...

Claims

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Application Information

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IPC IPC(8): D21H11/00D21H17/67D21H21/28D21C9/10D21G1/00
Inventor 曹涧
Owner 川印文化集团股份有限公司
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