Environment-friendly eye protection paper and preparation method thereof

An eye-protecting paper, an environmentally friendly technology, applied in special paper, paper, papermaking, etc., can solve the problems of low wet paper strength and severe paper web shrinkage

Pending Publication Date: 2021-02-23
SHANGHAI M&G STATIONERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because bagasse pulp has more miscellaneous cells, shorter fibers and higher content of pentose, a series of problems will occur when simply using bagasse pulp to make paper, such as low wet paper strength, severe paper web shrinkage during paper drying, etc.

Method used

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  • Environment-friendly eye protection paper and preparation method thereof
  • Environment-friendly eye protection paper and preparation method thereof
  • Environment-friendly eye protection paper and preparation method thereof

Examples

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preparation example Construction

[0032] The invention relates to an environment-friendly eye protection paper and a preparation method thereof, which reflects light softly and does not cause damage to human eyes. The key to the eye protection paper is that it can achieve the purpose of eye protection and environmental protection through coordination and cooperation of various factors such as color vision perception, reading efficiency, eye environment, environmental benefits, physical and chemical properties, and economic benefits. The main technical characteristics of the technical solution of the present invention:

[0033] (1) The CIELab parameter range of the eye protection paper is L: 90-95, a: 3-10, b: 18-25, the opacity is 88-95%, and the whiteness is 60-70% ISO. The "CIELab" is a uniform color space commonly used at present, and is also the most commonly used color representation method for paper. The three variables "L, a, b" defined by CIELab color space are respectively expressed as follows: L is ...

Embodiment 1

[0050] (1) Preparation of hematoxylin pulp: cutting and pulverizing the hematoxylin so that its length does not exceed 30 mm. Remove the silt, fly ash, and other sundries mixed in the raw materials. Add 6% of the mass of hematoxylin aluminum sulfate, add an aqueous solution twice the mass of hematoxylin, the aqueous solution contains 1% sodium hydroxide by mass percentage, mix and heat to 30°C for 2 hours, transport to a refiner for The dissociation is uniform, the mass fraction of the refining concentration is 20%, and the degree of beating after refining is 25°SR.

[0051] (2) Mix bagasse pulp, bamboo pulp, waste paper pulp, and hematoxylin pulp according to the ratio of mass parts 40:25:34.5:0.5, and transport them to a refiner for beating treatment. The mass fraction of refining concentration is 25%. , the degree of percussion after refining is 25°SR. Add fillers and additives to adjust the pulp, adjust the pH to 6-8, and then make paper.

[0052] The types and parts by...

Embodiment 2

[0056] (1) Preparation of hematoxylin pulp: cutting and pulverizing the hematoxylin so that its length does not exceed 30 mm. Remove the silt, fly ash, and other sundries mixed in the raw materials. Add aluminum sulfate 10% of the mass of hematoxylin, add an aqueous solution 3 times the mass of hematoxylin, the aqueous solution contains 5% sodium hydroxide by mass percentage, mix and heat to 60°C and soak for 1.5 hours, and transport to a refiner for The dissociation is uniform, the mass fraction of the refining concentration is 25%, and the beating degree after refining is 30°SR.

[0057] (2) Mix bagasse pulp, bamboo pulp, waste paper pulp, and hematoxylin pulp according to the ratio of mass parts 33:28:38:1, and transport them to a refiner for beating treatment. The mass fraction of refining concentration is 28%. , the degree of knocking after refining is 30°SR. Add fillers and additives to adjust the pulp, adjust the pH to 6-8, and then make paper.

[0058] The types and...

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Abstract

The invention discloses an environment-friendly eye protection paper. A preparation method of the paper comprises the following steps that 30-40 parts by weight of bagasse pulp, 20-30 parts by weightof bamboo pulp, 30-40 parts by weight of waste paper pulp and 0.1-1.5 parts by weight of Caesalpinia sappan pulp are made into mixed pulp. The mixed pulp does not need to be bleached, does not need tobe added with chemical dyes and is in a light grapefruit color. Aluminum sulfate, rosin size, talcum powder, titanium dioxide and the like are added into the mixed pulp, water is added to dilute themixed pulp for adjusting the concentration and color, and then dehydrating, forming, cutting and the like are conducted to obtain the eye protection paper. The preparation raw materials of the eye protection paper are environmentally friendly, and waste recycling is fully achieved; through the mode of adding a vegetable dye into the unbleached pulp, the bleaching process is avoided, the addition of chemical reagents is reduced, and the method is beneficial to the environment; and the paper surface presents a light grapefruit color, so that eye fatigue is effectively relieved while attractiveness and elegance are achieved.

Description

technical field [0001] The invention relates to an environment-friendly eye-protecting paper, especially light grapefruit-colored eye-protecting paper, and a preparation method thereof. Background technique [0002] Most of the office paper or writing books used by students in China are printed with a white background. According to international general standards, the whiteness of paper should be lower than 84°. However, in order to pursue the whiteness and beauty of paper, the whiteness of pulp used in China is usually higher than this value. Scientific testing shows that the higher the whiteness of paper, the stronger its reflection of light and the greater the harm to eyesight. Moreover, paper is often chemically bleached in order to pursue whiteness and beauty, and the chemical substances left by bleaching will endanger human health. White paper has a reflective effect on full-frequency light. Among them, the reflected short-wavelength blue light and purple light have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21H11/14D21H17/67D21H17/68D21H17/62D21H17/66D21H17/02D21H21/28D21H27/00
CPCD21H11/12D21H11/14D21H17/675D21H17/68D21H17/62D21H17/66D21H17/02D21H21/28D21H27/00
Inventor 郭亨长韦荣陈晓聪陈奇池小波张扬勇王跃斌
Owner SHANGHAI M&G STATIONERY INC
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