Top coating for coating layer of double-sided coating white board as well as preparation method and application thereof

Abstract

The invention discloses a top coating for a coating layer of a double-sided coating white board as well as a preparation method and application thereof. As the top coating, the double-sided coating white board after being applied and coated by a coating machine not only is suitable for high-grade printing but also is suitable for vacuum forming. The top coating comprises the following components in parts by mass: 20 to 50 parts of kaolin, 50 to 80 parts of calcium carbonate, 10 to 18 parts of latex and 25 to 35 parts of water. The top coating also contains the components of a dispersant, a lubricant, a water repellent agent, a bactericide, a pH regulator and a functional assistant of 0.6 to 3.0 parts by mass of PC4200 soybean protein. By adding the functional assistant, the closure property of the coating layer can be opened, the covering property of the coating is enhanced, the use quantity of wood pulp is reduced, the smoothness of finished paper is lowered, and the infiltration of vacuum forming oil is benefited. The coating is applied and coated on a paperboard by the coating machine, can enable the paperboard to have favorable printing ink acceptance, improves the covering property of a paper face greatly and has lower smoothness and roughness and favorable printing adaptability.

Description

technical field [0001] The invention belongs to the technical field of white board paper coating, and in particular relates to a double-sided coated white board paper coating layer top coating and its preparation method and application. Background technique [0002] In today's market, the transparency of blister packaging brings great convenience to buyers, and the exquisite printing of blister packaging is also very attractive to buyers, so it is widely favored by the packaging design industry. The so-called blister packaging is to heat-seal the blister (commonly known as the plastic film) on the surface of the printed cardboard with blister oil, so the requirement for the cardboard is that it is suitable for both printing and blister. At present, the ordinary double-sided coated whiteboard paper on the market is not suitable for blistering, and cannot meet the requirements of being suitable for both printing and blistering. There are usually the following problems: 1. The ...

AI Technical Summary

Problems solved by technology

At present, the ordinary double-sided coated whiteboard paper on the market is not suitable for blistering, and cannot meet the requirements of being suitable for both printing and blistering. There are usually the following problems: 1. The surface coating is too densely sealed; 2. The smoothness of the cardboard is too high, It is not conducive to the penetration of blister oil; 3. The cardboard has low stiffness and cannot bear the weight of the packaging

In addition, in order to pursue the beauty of the paper surface of ordinary double-sided coated white board paper, a large amount of wood pulp is used, resulting in a lot of waste of wood

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