Coated white board paper

A white board paper and coating technology, which is applied in coating, paper, papermaking, etc., can solve the problems that white spots cannot be eliminated, the coating amount changes, and the production cost becomes higher, so as to improve the appearance of white spots, less possibility, and improve the appearance sexual effect

Active Publication Date: 2016-09-21
HOKUETSU KK
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is necessary to use a large amount of expensive titanium dioxide, and there is a problem that the production cost becomes high.
In addition, since the weight per square meter of the white board paper is large, the difference in the weight per square meter of the part is also likely to be large. volume change
Therefore, even if a pigment coating layer containing titanium dioxide with high hiding properties is provided, the white spots on the appearance of the coated white board paper may not be eliminated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Disperse 90 parts of hardwood pulp (L-BKP) and 10 parts of softwood pulp (N-BKP) in water, adjust to 350 cc of CSF to obtain flow pulp, and mix light carbonate with a content of 4% relative to the pulp amount into the flow slurry Calcium (trade name: TP121-6S / Okutama Industry Co., Ltd. BET specific surface area 7.0m 2 / g) obtain the raw material of surface layer. Then disperse the unbeaten deinked bleached waste paper pulp in water to obtain the raw materials of the lining layer and the bottom layer. The deinked waste magazine pulp was then dispersed in water to obtain the raw material for the core layer. Using fourdrinier paper machine under the condition of pH7.7, using various raw materials to make 4 layers of surface layer / lining layer / core layer / bottom layer, the weight per square meter is 310g / m 2 white paper. The weight per square meter of the surface layer of the obtained white board paper is 25g / m 2 , the whiteness is 78%; the weight per square meter of th...

Embodiment 2

[0055] Light calcium carbonate (trade name: TP121-6S / Okutama Industry Co., Ltd. BET specific surface area 7.0m 2 / g) was added to 9% relative to the amount of pulp, and papermaking was carried out in the same manner as in Example 1 to obtain coated white board paper.

Embodiment 3

[0057] Change the calcium carbonate mixed in the surface layer of white board paper to light calcium carbonate (the specific surface area of ​​the trial product ABET is 9.5m 2 / g), in addition, by the same method papermaking of embodiment 1, obtain coated white board paper.

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Abstract

The invention provides white board paper with the white paper appearance free of remarkable hickie. As calcium carbonate with the mass larger than or equal to 3% and smaller than 10% of the surface-layer paper pulp mass is added into a surface layer, the white board paper of the multilayer papermaking structure in which dark gray caused by waste paper closer to the inner side than a lining layer is evenly hidden can be obtained.

Description

[0001] This application is a divisional application of the application with the filing date of July 20, 2012, the application number of 201210260036.4, and the invention name of "Coated White Board Paper". technical field [0002] The invention relates to a coated white board paper, especially a coated white board paper with waste paper pulp as the core layer, and more specifically, relates to a coated white board paper with the appearance of white paper without obvious white spots on the outside. Background technique [0003] White board paper can be printed and used as packaging paper. Therefore, printing adaptability is required on white board paper. In addition, while the white board paper is white, the absence of white spots is also an important issue. The white board paper mentioned here has a weight of 150g / m2 per square meter 2 The above thick paper generally has a multilayer structure of 3 to 9 layers. For example, multi-layer white board paper produced by paperm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/30D21H19/38B32B29/06
CPCB32B29/06D21H19/385D21H27/30
Inventor 田村笃安藤邦宏酒井克弥佐藤勤田中正树石垣信宏野田和宏
Owner HOKUETSU KK
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