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Production method of anti-myopia paper

A production method and technology of myopic paper, applied in papermaking, paper coatings, textiles and papermaking, etc., can solve problems such as environmental pollution, and achieve the effects of high output, low waste water pollution, and high fiber strength

Active Publication Date: 2012-11-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the shortage of plant fiber raw materials that papermaking relies on, as a non-wood raw material of wheat straw, wheat straw, a sustainable crop straw raw material, has begun to be valued by the paper industry at home and abroad. The current method of making anti-myopia paper is bleaching. Dye or dyeing agent is added to the pulp, and then processed into finished products. Chemical dyeing agents are used, which cause great pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: a kind of production method of anti-myopia paper,

[0017] 1) Firstly, the wheat straw is crushed and cut into 25mm-long grass slices; after the sand, stones and iron filings in the raw grass slices are removed by a grass washing machine, the grass slices are dehydrated by screw extrusion and transported to the pre-impregnation device;

[0018] 2) Next, in the presoaker, add the aqueous solution of 3 times relative to dry grass sheet, described aqueous solution contains the sodium hydroxide that mass fraction is 3%, the hydrogen peroxide of 3%, the catalyst of 0.1% and the fiber of 0.01% Protective agent, mixed and heated to 60°C and then soaked for 4 hours, so that the grass slices are softened, soaked and become soft and easy to dissociate;

[0019] The fiber protective agent is anthraquinone, and the catalyst is composed of 0.01%-0.1% sodium hydroxide and hydrogen peroxide protective agent and 0.1%-0.3% grass tablet softener; The protective agent for ...

Embodiment 2

[0026] Embodiment 2: a kind of production method of anti-myopia paper,

[0027] 1) First, the wheat straw is crushed and cut into 30mm-long grass pieces; after the sand, stones and iron filings in the raw grass pieces are removed by a grass washer, the grass pieces are dehydrated by screw extrusion and transported to the prepreg device;

[0028] 2) Next, in the presoaker, add the aqueous solution of 8 times relative to dry grass sheet, described aqueous solution contains the sodium hydroxide that mass fraction is 10%, the hydrogen peroxide of 10%, the catalyst of 3.0% and the fiber of 0.1% Protective agent, mixed and heated to 60°C and then soaked for 2 hours, so that the grass slices are softened, soaked and become soft and easy to dissociate;

[0029] The fiber protective agent is anthraquinone, and the catalyst is composed of 0.01%-0.1% sodium hydroxide and hydrogen peroxide protective agent and 0.1%-0.3% grass tablet softener; The protective agent for sodium and hydrogen...

Embodiment 3

[0036] Embodiment 3: a kind of production method of anti-myopia paper,

[0037] 1) Firstly, the wheat straw is crushed and cut into 28mmmm grass slices; after the sand, stones and iron filings in the raw grass slices are removed by a grass washing machine, the grass slices are dehydrated by screw extrusion and transported to the pre-impregnation device;

[0038] 2) Next, add water to the grass slices in the presoaker, add 5 times the aqueous solution relative to the dry grass slices, the aqueous solution mass fraction is 8% sodium hydroxide, 7% hydrogen peroxide, 1.5% catalyst and 0.04 % fiber protective agent, mixed and heated to 90°C and then soaked for 1 hour, so that the grass slices are softened, soaked and become soft and easy to dissociate;

[0039] The fiber protective agent is anthraquinone, and the catalyst is composed of 0.01%-0.1% sodium hydroxide and hydrogen peroxide protective agent and 0.1%-0.3% grass tablet softener; The protective agent for sodium and hydro...

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Abstract

The invention provides a production method of an anti-myopia paper. The method comprises the steps of: impregnating a wheat straw raw material by chemical medical liquid; pretreating under a normal-pressure and low-temperature condition; separating and thinning fiber by a mechanical twisting, grinding and fiber-separating method; and copying into a paper on a paper maker. The directly-obtained color of the paper is yellow, the yellow fiber paper with different depth degrees can be produced according to the difference of the chemical products and the treatment conditions, the paper is used forthe book for the school children or the reading magazine, and the paper has the function of myopia resistance without dazzling. The paper produced by the method is higher in yield and better in mechanical strength, wherein the yield of the paper is more than 60%, the rupturing length of the paper is more than 6.0km, the rupturing-resistant index is more than 4.2kPa.m<2> / g, the rupturing index is more than 3.20mN.m<2> / g, and the folding strength of the paper is more than 100 times.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a production method of anti-myopia paper. Background technique [0002] With the shortage of plant fiber raw materials that papermaking relies on, as a non-wood raw material of wheat straw, wheat straw, a sustainable crop straw raw material, has begun to be valued by the paper industry at home and abroad. The current method of making anti-myopia paper is bleaching. Dye or dyeing agent is added to the pulp, and then processed into finished products. Chemical dyeing agents are used, which cause great pollution to the environment. Contents of the invention [0003] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a production method of anti-myopia paper, the produced paper is natural yellow, and has the characteristics of higher output rate and better mechanical strength. [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/00D21H11/02D21H11/12D21C3/02D21H21/16
Inventor 吴养育刘叶任涛罗清王晓龙
Owner SHAANXI UNIV OF SCI & TECH
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