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Paint special for paperboard coating and paperboard

A coating and cardboard technology, used in paper coating, papermaking, coating, etc., can solve the problems of poor coating surface coverage, high coating dosage, and paper bursting.

Active Publication Date: 2020-07-07
DONGGUAN JINTIAN PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water absorption of the coated base paper is too large (greater than 120g / m 2 ) will cause problems such as delamination between layers, paper bursting, etc.
When the paperboard without sizing treatment, especially the gray paperboard, is used for coating base paper, coating with the coating in the prior art, the coating will penetrate into the fiber of the paperboard in a large amount, and after the coating that penetrates into the paperboard dries, pre- The water absorption COBB value of the coating will not be significantly improved. After the traditional three-layer coating, the coating still cannot cover the cardboard well, and the coating consumption is high
Because of this shortcoming, when the cardboard without sizing treatment is directly used in the coating process, it is easy to cause poor quality problems such as poor covering of the coated surface and powder falling off the coating, and the amount of coating is large, and the drying energy consumption is large. This greatly limits the production feasibility and output efficiency of unsized board coating

Method used

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  • Paint special for paperboard coating and paperboard
  • Paint special for paperboard coating and paperboard
  • Paint special for paperboard coating and paperboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The mass components of the coating prepared in Example 1 are shown in Table 1.

[0049] Table 1

[0050]

[0051]

[0052] In the present embodiment, GCC65 is 65wt% of particles with particle size less than or equal to 2 μm particle size in heavy calcium carbonate, GCC75 is 75% by weight of particles with particle size of 2 μm particle size or less in heavy calcium carbonate, and GCC95 is small particles in heavy calcium carbonate. The content of particles with a particle size of 2 μm or less is 95% by weight; the whiteness of kaolin 1 is 84%, and the content of particles with a particle size of 2 μm or less is 82% by weight; the whiteness of kaolin 2 is 90%, and the content of particles with a particle size of 2 μm or less is 86% by weight. The whiteness of kaolin 3 is 86%, and the particle size content of less than or equal to 2 μm is 84wt%; 52%, the emulsified particle size is 40-60nm; the esterified starch is acetate coated starch; the liquid caustic soda is ...

Embodiment 2

[0059] The mass components of the coating prepared in Example 2 are shown in Table 2.

[0060] Table 2

[0061]

[0062]

[0063]In the present embodiment, GCC55 is 55wt% of particles with particle size less than or equal to 2 μm particle size in heavy calcium carbonate, GCC65 is 65% by weight of particles with particle size of 2 μm particle size or less in heavy calcium carbonate, and GCC98 is small particles in heavy calcium carbonate. The content of particles with a particle size of 2 μm or less is 98% by weight; the whiteness of kaolin 1 is 86%, and the content of particles with a particle size of 2 μm or less is 86% by weight; the whiteness of kaolin 2 is 92%, and the content of particles with a particle size of 2 μm or less is 88% by weight. The whiteness of kaolin 3 is 88%, and the particle size content of less than or equal to 2 μm is 88wt%; the solid content of styrene-butadiene latex 1 is 50-55wt%, the emulsified particle size is 80-120nm, and the solid content...

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to a paint special for paperboard coating and a paperboard. The paint special for paperboard coating comprises a pre-coating paint, a core coating paint and a surface coating paint. Main raw materials of the paint comprise ground calcium carbonate, kaolin, styrene-butadiene latex, coating starch, liquid caustic soda, a water repellent agent, a water retaining agent and other additives. The raw material ratio is designed according to different coating functions of each part; according to the paint prepared by theinvention, kaolin with different whiteness is used for replacing part of calcium carbonate, certain covering performance is given to the coating, the use amount of the coating starch is higher than that of a traditional formula, so that the strength of the coating is enhanced, the use amount of the water-retaining agent is higher than that of the traditional formula, the water-retaining propertyof the paint can be improved, water-soluble chemical raw materials in the paint are prevented from excessively permeating into paper, and the bonding strength between the core coating and the pre-coating paint is ensured; through reasonable matching of each part of raw materials, the smoothness and the whiteness of the coated paperboard are high, and the overall coating effect is good.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a special coating for cardboard coating and a cardboard. Background technique [0002] If the production process of the cardboard has not been treated with sizing, the water resistance of the cardboard is relatively poor. Gray cardboard is a typical cardboard without sizing treatment. The water absorption COBB (Cobb Absorption Tester, paper and cardboard absorbency tester) value of gray cardboard is generally 200-300g / ㎡ of water per minute, while the sized The water absorption COBB value of kraft cardboard wrapping paper or other wrapping paper is generally 20-60g / ㎡ per minute. The water absorption of the coated base paper is too large (greater than 120g / m 2 ) will cause problems such as delamination between layers, and paper bursting. When the paperboard without sizing treatment, especially the gray paperboard, is used for coating base paper, coating with the coa...

Claims

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Application Information

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IPC IPC(8): D21H19/38
CPCD21H19/385
Inventor 袁毅陈永沛杨琪林王伟杰
Owner DONGGUAN JINTIAN PAPER CO LTD
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