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A new production method of dyed bovine bottom coated white board paper

A production method and technology for whiteboard paper, applied in the field of papermaking, can solve the problems of paper breakage, high cost per ton of paper, low A-grade rate of finished paper, etc., and achieve the effect of stable operation

Active Publication Date: 2018-06-12
NINE DRAGONS PAPER IND TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the production of raw bottom-coated white board paper, because the bottom pulp is all domestic waste containerboard pulp, and the content of stickies in the pulp is relatively high, and the pre-drying causes many holes in the base paper web, so the operating rate of the paper machine is affected. It has a great impact, the number of paper breaks is more, the rate of paper grade A is low, and the cost per ton of paper is high
Therefore, on the production line of coated whiteboard paper with waste containerboard used as base pulp in China, such problems as paper defects and paper breaks caused by stickies have seriously hindered the development of this type of paper. Coated white board paper with a base color of kraft card is a vacuum void

Method used

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Effect test

Embodiment 1

[0040] A new production method of dyed bovine bottom coated white board paper includes: paper machine speed 810m / min, bottom stock flow rate 4552L / min, bottom stock concentration 3.15%, bottom hanging weight 24.0g / m 2 . The amount of black dye is 2.950kg / t, the amount of oxalan red is 0.82kg / t, and the amount of oxalic yellow is 4.60kg / t. The produced dyed bovine bottom-coated white board paper has an L value of 61.62, a value of 5.61, and b value of 16.71, which not only meets the hue requirements of the bottom surface L, a, and b values, but also has basically the same physical strength as the original bovine bottom-coated white board paper.

Embodiment 2

[0042] A new production method of dyed bovine bottom coated white board paper includes: paper machine speed 810m / min, bottom stock flow rate 4576L / min, bottom stock concentration 3.00%, bottom hanging weight 23.0g / m 2 . The amount of black dye is 2.850kg / t, the amount of oxa red is 0.84kg / t, and the amount of oxa yellow is 4.70kg / t. The produced dyed bovine bottom-coated white board paper has an L value of 61.67, a value of 5.40, and b value of 17.05, which not only meets the hue requirements of the bottom surface L, a, and b values, but also has basically the same physical strength as the original bovine bottom-coated white board paper.

Embodiment 3

[0044] A new production method of dyed bovine bottom coated white board paper includes: paper machine speed 780m / min, bottom stock flow rate 4571L / min, bottom stock concentration 3.26%, bottom hanging weight 26.0g / m 2 . The amount of black dye is 2.750kg / t, the amount of oxalan red is 0.88kg / t, and the amount of oxalic yellow is 4.10kg / t. The produced dyed bovine bottom-coated white board paper has an L value of 60.65, a value of 5.63, and b value of 17.04, which not only meets the hue requirements of the bottom surface L, a, and b values, but also has basically the same physical strength as the original bovine bottom-coated white board paper.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The present invention provides a novel dyeing kraft bottom coating white board paper production method, wherein online dyeing is performed on the 100% specific deinking base pulp mainly through three dyes such as a yellow dye, a black dye and a red dye. According to the present invention, the previous waste kraftpaper having the poor operating rate is adopted as the base pulp to replace the dyeing base pulp of the 100% specific deinking base pulp, such that the broken holes on the raw paper due to the pre-drying during the operating of the paper machine can be reduced, the paper breaking number can be reduced, the operating rate of the paper machine can be substantially improved, the A grade rate of the finished product can be improved, and the cost of per ton of the paper can be further reduced; and in the case of the same physical strength indicators, the back surface has characteristics of delicate appearance, dot reducing and good visual effects, and is favored by customers.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a novel production method of dyed bovine bottom-coated white board paper, and a color-matching method for adjusting L, a, and b values ​​with three direct dyes of yellow, black, and red. Background technique [0002] During the production of raw bottom-coated white board paper, because the bottom pulp is all domestic waste containerboard pulp, and the content of stickies in the pulp is relatively high, and the pre-drying causes many holes in the base paper web, so the operating rate of the paper machine is affected. It has a great impact, the number of paper breaks is more, the rate of paper grade A is low, and the cost per ton of paper is high. Therefore, on the production line of coated whiteboard paper with waste containerboard used as base pulp in China, such problems as paper defects and paper breaks caused by stickies have seriously hindered the development of this type...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H23/12D21H23/78D21H21/28
Inventor 张艳彬
Owner NINE DRAGONS PAPER IND TIANJIN
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