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Preparation process of eyesight protection paper

A preparation process and vision protection technology, applied in the field of papermaking, can solve problems such as environmental pollution

Pending Publication Date: 2021-06-01
JIANGSU KEYI CULTURE IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention uses waste thin book paper deinking pulp, coniferous wood pulp, and wheat straw pulp to prepare anti-myopia paper, and the waste is recycled. However, alkaline bright yellow, lemon yellow, and sunfast yellow are still used in combination, and the dyes will cause certain pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] A preparation process for eyesight protection paper, using a mixture of waste paper and straw as a raw material, the specific steps are as follows:

[0038] a. Cut the straw into flakes with a length of 1cm to 2cm, and remove impurities by a grass washer before dehydration;

[0039]b. Put the dehydrated flaky straw into a container containing a solvent and mix evenly. The solvent contains a swelling agent, a cooking agent and water, wherein the swelling agent accounts for 5% to 15% of the mass fraction of the straw Combination of sodium hydroxide and silicon compound accounting for 0.2% to 0.5% of the mass fraction of the straw, the cooking agent is sodium sulfite accounting for 2% to 6% of the mass fraction of the straw and anthraquinone accounting for 0.02% to 0.05% of the mass fraction of the straw combined;

[0040] c. Heat the container in step b to cook the stalks, the cooking temperature is 100°C-180°C, the cooking time is 1h-2h, then keep the temperature at 150...

Embodiment 1

[0051] A preparation process for eyesight protection paper, using a mixture of waste paper and straw as a raw material, the specific steps are as follows:

[0052] a. Cut the straw into flakes with a length of 1cm to 2cm, and remove impurities by a grass washer before dehydration;

[0053] b. Put the dehydrated flaky straw into the container, add swelling agent and cooking agent in the container: the swelling agent is sodium hydroxide accounting for 5% of the straw mass fraction and 0.2% of the straw mass fraction The combination of silicon compounds, the cooking agent is a combination of sodium sulfite accounting for 2% of the mass fraction of the straw and anthraquinone accounting for 0.02% of the mass fraction of the straw, adding water and mixing evenly;

[0054] c, heat the container in step b and cook the straw, the cooking temperature is 120°C, the cooking time is 1h, then keep the temperature at 150°C, soak for 0.5h, soften the flaky straw and remove impurities in the ...

Embodiment 2

[0063] A preparation process for eyesight protection paper, using a mixture of waste paper and straw as a raw material, the specific steps are as follows:

[0064] a. Cut the straw into flakes with a length of 1cm to 2cm, and remove impurities by a grass washer before dehydration;

[0065] b. Put the dehydrated flaky straw into the container, add swelling agent and cooking agent in the container: the swelling agent is sodium hydroxide accounting for 15% of the straw mass fraction and 0.5% of the straw mass fraction The combination of silicon compounds, the cooking agent is a combination of sodium sulfite accounting for 6% of the mass fraction of the straw and anthraquinone accounting for 0.05% of the mass fraction of the straw, adding water and mixing evenly;

[0066] c. Heat the container in step b and cook the straw. The cooking temperature is 180° C. and the cooking time is 2 hours. Then keep the temperature at 180° C. and soak for 1.5 hours to soften the flaky straw and re...

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Abstract

The invention discloses a preparation process of eyesight protection paper, which adopts a mixture of waste paper and straws as a raw material and comprises the following specific steps: a, cutting the straws into sheets, removing impurities and dehydrating; b, putting the straws into a solvent and mixing; c, cooking and removing impurities to obtain straw unbleached pulp; d, crushing waste paper and adding hot water to prepare paper pulp; e, performing deinking treatment on the paper pulp in the step d to obtain waste paper pulp; f, uniformly mixing the straw unbleached pulp, the waste paper pulp and a porous filler to form mixed pulp; g, subjecting the mixed slurry to hot grinding dissociation, and taking one part of the ground slurry as a surface slurry; h, adding a light absorbing filler into the rest of the ground slurry, carrying out hot grinding dissociation again, and taking the ground slurry as a core layer slurry; i, manufacturing the eyesight protection paper through a papermaking machine, wherein the eyesight protection paper is formed by compounding an upper layer, a middle layer and a lower layer, the outer paper faces of the upper layer and the lower layer are made of surface slurry, and the middle light absorption layer is made of the core layer slurry. The preparation process is environment-friendly, resources are saved, and the prepared paper can protect eyesight.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a preparation process of vision protection paper. Background technique [0002] The paper used in most of the books at present is white, which is characterized by strong brightness. Human eyes perceive fonts through the chromaticity and brightness contrast between paper and characters. The whiter the paper, the stronger the reflected light, which causes the greatest visual fatigue while causing the largest brightness contrast. The stronger the light, the greater the degree of visual fatigue caused. Regardless of the length of the viewing distance, the ciliary muscle is in a state of excessive contraction, causing the viewpoint to move forward. This visual environment becomes an incentive for the visual distance to approach, which can easily lead to myopia in the long run . [0003] "Anti-myopia paper" can emit colored light of a specific frequency, creating a safe and comfo...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H11/12D21H11/14D21C3/02D21C3/22D21B1/32D21H17/68D21H17/67
CPCD21H27/00D21H11/12D21H11/14D21C3/02D21C3/222D21B1/325D21H17/68D21H17/675Y02W30/64
Inventor 张永权吴养育毛文凤
Owner JIANGSU KEYI CULTURE IND GRP CO LTD
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