When the varnish of the pre-printed carton paper is exposed to the bottom of the paper, the film surface is damaged, which is the main reason for the unqualified quality of the paper.
Among them, the semi-finished product drying method and the stacking amount are uncomfortable, which is the main reason for the mutual adhesion of the upper and lower printed sheets, which causes the bottoming, especially when the paper is a full version of the green and blue printing layout, it is easier to make the upper and lower papers Membrane surfaces that adhere to each other and break through the bottom to destroy the glaze.
Therefore, for the glossy green and blue printing surface paper, it is best to use the air-laid paper rack with the air blowing device to erect the paper. If there is no special air-drying rack to dry, the glazed facial paper is placed in a plane overlap for drying. The height of each stack of air-laying should be controlled at about 25cm. After the coating layer is dry, the semi-finished products are stacked and stacked. However, the height of the dried semi-finished face paper stack should not exceed 150 cm.
In addition, it is necessary to adjust the appropriate ratio of glazing paint and thinner. The concentration of glazing coating should not be too high. According to the characteristics of the surface of glazing paper, a relatively suitable blending ratio should be mastered. When replacing glazing paints of different manufacturers and different types, it is necessary to first adjust the sample to carry out test glazing, carefully observe and analyze the condition of the test glazing process, and then formulate a suitable proportion of blending to avoid blindness. The glazing paint is blended to make the facial paper adhere to each other and damage the film surface, so that the quality of the glazing quality of the facial tissue can be well ensured.
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