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Coated white paperboard

A whiteboard paper and coating technology, applied in coating, paper, papermaking, etc., can solve the problems of inability to eliminate white spots, higher production costs, and changes in coating amount, so as to improve the appearance of white spots, improve aesthetics, and possibly small effect

Active Publication Date: 2014-02-12
HOKUETSU KK
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  • Abstract
  • Description
  • 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

[0052] Disperse 90 parts of hardwood pulp (L-BKP) and 10 parts of softwood pulp (N-BKP) in water and adjust to CSF350cc to obtain a slurry. The content of light carbonic acid is 4% relative to the pulp volume. Calcium (trade name: TP121-6S / made by Okutama Industry Co., Ltd. BET specific surface area 7.0m 2 / g) Obtain the raw material of the 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. Then disperse the deinked waste magazine pulp in water to obtain the raw material for the core layer. Using a Fourdrinier paper machine under the condition of pH 7.7, it is made of 4 layers of surface layer / lining layer / core layer / bottom layer with various raw materials, and the weight per square meter is 310g / m 2 White paper. The weight per square meter of the surface layer of the obtained white paper is 25g / m 2 , The whiteness is 78%; the weight per square meter of the lining is 40g / m ...

Embodiment 2

[0054] Light calcium carbonate (trade name: TP121-6S / made by Okutama Industry Co., Ltd., BET specific surface area 7.0m) mixed with the raw material of the white paper surface layer 2 / g) was added to 9% relative to the amount of pulp, except that the paper was made in the same manner as in Example 1 to obtain coated white paper.

Embodiment 3

[0056] The calcium carbonate mixed in the raw material of the white paper surface layer is changed to light calcium carbonate (the prototype ABET specific surface area is 9.5m 2 / g). Otherwise, paper was made in the same manner as in Example 1 to obtain coated white paper.

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Abstract

The invention provides a coated white paperboard without obvious hickie. Through use of 3-10wt% of calcium carbonate in a surface layer prepared from surface layer paper pulp, the coated white paperboard which has a multilayer papermaking structure and uniformly hides a dark gray color caused by waste paper closer to the inner side than a lining layer is obtained.

Description

Technical field [0001] The invention relates to a coated white board paper, in particular to a coated white board paper using waste paper pulp as a core layer, and more specifically, to a coated white board paper with the appearance of white paper without obvious white spots. Background technique [0002] Whiteboard paper can be printed and used as packaging paper. Therefore, printing adaptability is required on white paper. In addition, while the whiteboard paper is white, the absence of white spots has also become an important issue. The whiteboard paper mentioned here has a weight of 150g / m per square meter 2 The above thick paper is generally composed of a multilayer structure of 3 to 9 layers. For example, multi-layer whiteboard paper called surface layer, liner layer, core layer, and bottom layer produced by papermaking. 1 example of the composition of this white paper figure 1 Shown. figure 1 It is a cross-sectional view of white paper. figure 1 101 refers to the white ...

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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