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Method for preparing gravure paper

A gravure printing and pulp technology, applied in the field of gravure printing paper preparation, can solve the problems of poor printing effect, low water content, ink shedding, etc., and achieve the effects of avoiding ink absorption too fast, improving liquid resistance, and enhancing binding force

Inactive Publication Date: 2011-11-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the traditional gravure printing paper is printed, the ink layer will fall off to varying degrees, that is, the ink pigment will fall off due to slight friction. The main reason is that the gap between the paper fibers is large and the water content of the paper Therefore, the ink absorbs too quickly on the surface of the paper, and the color carrier of the ink penetrates into the paper too much, so that the film for fixing the pigment cannot be formed, so the ink falls off; in addition, the traditional gravure printing paper is due to The smoothness is not high. When printing small dots, the small dots sometimes fall to the depressions on the paper surface, so they cannot be printed, and the definition of the color picture is reduced, the tone level is reduced, and the printing effect is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Step 1: Collect leather (pigskin, sheepskin and other animal leather) shavings, clean up the sundries in the leather shavings, rinse the impurities on the surface of the leather shavings with tap water, and then add it to hydrogen with a mass concentration of 5%. In the sodium oxide solution, then soak the leather scraps at 55°C for 1.5 hours, the mass ratio of the sodium hydroxide solution to the leather scraps is 30:1;

[0014] Step 2: Transfer the mixed solution of leather shavings and sodium hydroxide obtained in step 1 to a disc refiner for grinding and beating so that the leather shavings are completely evacuated to obtain a protein fiber dispersion slurry. The speed is 3000 rpm, and the time is 2 minutes;

[0015] Step 3: Take bleached wheat straw pulp, add 2% protein fiber dispersion slurry to it, and mix uniformly to make paper pulp, wherein said 2% refers to protein fiber dispersion slurry accounts for protein fiber dispersion slurry and bleached wheat straw p...

Embodiment 2

[0018] Step 1: Collect leather (pigskin, sheepskin and other animal leather) shavings, clean up the sundries in the leather shavings, rinse the impurities on the surface of the leather shavings with tap water, and then add it to hydrogen with a mass concentration of 5%. In the sodium oxide solution, then soak the leather scraps at 55°C for 1.5 hours, the mass ratio of the sodium hydroxide solution to the leather scraps is 30:1;

[0019] Step 2: Transfer the mixed solution of leather shavings and sodium hydroxide obtained in step 1 to a disc refiner for grinding and beating so that the leather shavings are completely evacuated to obtain a protein fiber dispersion slurry. The speed is 3000 rpm, and the time is 2 minutes;

[0020] Step 3: Take the bleached wheat straw pulp, add 3% protein fiber dispersion slurry therein, and mix uniformly to make paper pulp. The 3% means that the protein fiber dispersion slurry accounts for the protein fiber dispersion slurry and bleached wheat s...

Embodiment 3

[0023] Step 1: Collect leather (pigskin, sheepskin and other animal leather) shavings, clean up the sundries in the leather shavings, rinse the impurities on the surface of the leather shavings with tap water, and then add it to hydrogen with a mass concentration of 5%. In the sodium oxide solution, then soak the leather scraps at 55°C for 1.5 hours, the mass ratio of the sodium hydroxide solution to the leather scraps is 30:1;

[0024] Step 2: Transfer the mixed solution of leather shavings and sodium hydroxide obtained in step 1 to a disc refiner for grinding and beating so that the leather shavings are completely evacuated to obtain a protein fiber dispersion slurry. The speed is 3000 rpm, and the time is 2 minutes;

[0025] Step 3: Take the bleached wheat straw pulp, add 4% protein fiber dispersion slurry to it, mix uniformly to make paper pulp, wherein said 4% means that the protein fiber dispersion slurry accounts for the protein fiber dispersion slurry and bleached whea...

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PUM

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Abstract

The invention provides a method for preparing gravure paper, which comprises the following steps of: collecting and cleaning leather scraps, and soaking the leather scraps in sodium hydroxide solution for 1.5 hours; dispersing a mixture formed by the leather scraps and sodium hydroxide to fully disperse the leather scraps in the sodium hydroxide solution so as to obtain protein fiber dispersoid slurry; adding the protein fiber dispersoid slurry into bleached wheat straw pulp and uniformly mixing to obtain paper pulp; adding aluminum sulfate solution into the paper pulp, uniformly mixing, and standing for 5 to 6 minutes; and finally making the gravure paper. The gravure paper prepared by the method does not have holes generated by cellulose combination, so that the bonding force between fibers is improved; therefore, the printing ink is not easy to fall off after printing, and the smoothness of the paper is improved.

Description

【Technical field】 [0001] The invention relates to a method for preparing printing paper, in particular to a method for preparing gravure printing paper. 【Background technique】 [0002] Gravure printing paper is white and firm, with good smoothness and water resistance. Therefore, it is mainly used for printing high-quality and high-quality printed matters such as high-end pictorials, high-end calendars, and art pictures. [0003] After the traditional gravure printing paper is printed, the ink layer will fall off to varying degrees, that is, the ink pigment will fall off due to slight friction. The main reason is that the gap between the paper fibers is large and the water content of the paper Therefore, the ink absorbs too quickly on the surface of the paper, and the color carrier of the ink penetrates into the paper too much, so that the film for fixing the pigment cannot be formed, so the ink falls off; in addition, the traditional gravure printing paper is due to The sm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/70D21H17/66
Inventor 陈永常刘筱霞张曼
Owner SHAANXI UNIV OF SCI & TECH