High-whiteness pure paper and manufacturing technology thereof

A high-white, crafted technology, applied in the field of papermaking, can solve the problems of low paper surface smoothness, dull color, poor printing performance, etc.

Active Publication Date: 2012-06-13
MCC PAPER YINHE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the passage of time, printers put forward some opinions on the quality indicators of light paper: low smoothness of paper s

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In June 2011, China Metallurgical Paper Galaxy Co., Ltd. adopted the invention in the company's 9 # Machine production 70g / m 2 High-white pure paper, the pulp mass ratio is APMP: NBCTMP: NBKP: LBKP = 50: 15: 20: 15, the degree of tapping APMP pulp is 42°SR, NBCTMP is 47°SR, NBKP is 38°SR, and LBKP is 42° °SR, wet weights are 1.0~1.2g, 5.3~5.5g, 5.3~5.5g, 2.0~2.5g; ISO whiteness is 75~76%, 79~80%, 87~88%, 79~80 %. The specific operation is as follows:

[0018] (1) The slurry is pumped to the slurry mixing tank, and at the same time, the carboxymethyl starch (CMS) solution with a concentration of 0.5% is added to the slurry mixing tank, and the stirring propeller of the slurry mixing tank is started, and the added slurry is Material and carboxymethyl starch solution are stirred and mixed; the add-on of described carboxymethyl starch solution is 2.0kg / t slurry;

[0019] (2) The slurry mixed with the CMS solution in step (1) is pumped to the No. 1 pulp tank, and the slu...

Embodiment 2

[0025] In August 2011, China Metallurgical Paper Galaxy Co., Ltd. adopted the invention in the company's 15 # Machine production 78g / m 2 High-white pure paper, the pulp mass ratio is APMP: NBCTMP: NBKP: LBKP = 55: 15: 20: 10, the degree of beating APMP pulp is 41°SR, NBCTMP is 47°SR, NBKP is 38°SR, and LBKP is 40 °SR, wet weight is 1.0~1.2g, 5.3~5.5g, 5.3~5.5g, 2.0~2.5g, ISO whiteness is 75~76%, 79~80%, 87~88%, 79~80 %. The specific operation is as follows:

[0026] (1) The slurry is pumped to the slurry mixing tank, pumped to the slurry mixing tank, and simultaneously adding a carboxymethyl starch solution with a concentration of 0.45% in the slurry mixing tank, and starting the stirring propeller of the slurry mixing tank, The added slurry and carboxymethyl starch solution are stirred and mixed; the add-on of said carboxymethyl starch solution is 2.5kg / t slurry;

[0027] (2) The slurry mixed with carboxymethyl starch solution in step (1) is pumped to No. 1 pulp tank, and...

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Abstract

The invention discloses high-whiteness pure paper and a manufacturing technology thereof. In the technology, poplar APMP pulp, needle-leave wood bleached chemical thermomechanical pulp, bleached sulfate needle-leave wood pulp and bleached sulfate broad-leave wood pulp are used for preparing pulp; CMS is added into a pulp preparation pond, wherein due to the water retaining property of the CMS, the dehydration of the high-yield pulp in a net part is slowed down, and the paper uniformity and smoothness are improved; a chelating agent DTPA is added into a white water tank so as to suppress resinaggregation and prevent drop of the pulp whiteness; and before adding the traditional retention aids CPAM and APAM, PAC is added so as to reduce the negative charges of a pulp suspension mainly containing the high-yield pulp, improve the one-pass retention of the manufacturing and increase the paper uniformity and smoothness. The quality indexes of the manufactured high-whiteness pure water are as follows: quantification is 70-80 g/m<2>, the ISO whiteness is 82-86%, the smoothness (front side/back side) is greater than 25 S, the strength of the printing surface is greater than 1.5 m/s, and the bulk is 1.5-1.6 cm<3>/g.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a high-white pure paper and its papermaking process. Background technique [0002] At present, due to the characteristics of high fluorescent whiteness, low bulk and chemical pulp ratio of double-sided offset printing paper, it has been difficult to adapt to the current concept of green environmental protection and low carbon that is vigorously advocated. In recent years, light paper has replaced some high-grade double-sided offset printing paper and has been recognized in the market. However, with the passage of time, printers put forward some opinions on the quality indicators of light paper: low paper surface smoothness, poor printing performance; dull color, visually unsightly; low printing surface strength, difficult to adapt to multi-color rotary printing. Contents of the invention [0003] In order to overcome the above shortcomings, the purpose of the present inven...

Claims

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Application Information

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IPC IPC(8): D21H11/10D21H17/66
Inventor 李树俭曾金枝张小丽田红霞
Owner MCC PAPER YINHE
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