Analysis of the suitability of the printing performance of coated white paperboard

In recent years, light industrial goods packaging is no longer a traditional transport packaging, but a beneficial marketing and consumer packaging concept. The coated paperboard used for high-grade packaging not only can meet the printing requirements of various advanced printing machines, but also has bright colors, clear images and vivid images after printing. Moreover, competitive pressure and profit orientation require the price of coated white paperboard to be suitable. Accurate positioning, cost-effective. Therefore, the production of coated white cardboard, how to achieve both to meet the printing performance, but also to control the production costs, to create benefits, put forward a higher comprehensive requirements. In the past year, after a constant exchange of exploration, production practices, optimization of formulas, and intensified management, a certain factory has accumulated some experience in production practices. The application of cardboard coating technology has been improved and unified, and the process control at the production site has been continuously improved. And management level. The current product quality is stable, the customer is basically satisfied, and the economic benefit of the enterprise is gradually increasing.

The white paperboard base paper of a factory is sprayed and formed by a plurality of rotary screen pressure formers. The slurry is formed by a square cone tube and a plurality of small tubes. The former has a homogenate chamber and can adjust the lip plate and the circle. The cage clearance adjusts the spray speed, and the sizing form is more uniform in the circular screen machine. In order to improve the water filtration capacity, reduce the delamination of the paper, and increase the speed, the net cage is equipped with a suction system. The 7 forming cages were originally equipped with only one exhaust fan. The speed was slightly faster, and slippage occurred. After analysis, it was found that the suction vacuum degree of the cage was not enough, and after adding one more exhaust fan, the track marks that originally produced slipstream, the clear spots, and the phenomenon of sloshing occurred in the past were eliminated, and the sheet formation was eliminated. It also greatly improved, and at the same time reduced the moisture of the sheet roll-out roll, reduced the phenomenon of embossing of the couch roll and the press roll, and improved the drying ability of the paper machine. However, due to the increase of the degree of vacuum, the concentration of white water is high, the loss of fibers and fillers is large, and the fine fibers can easily clog the mesh, which in turn leads to difficulty in water filtration and the copper mesh is easily dirty. To this end, cage washing is enhanced, and mobile high-pressure shower spray nets are improved and used to eliminate this problem, thereby greatly improving the quality of the base paper.

The board is made up of four different types of pastes. Except that the batter is a pulp board, the rest are waste pulp and the components are complex and easy to separate. The coated white board has a very high level of bonding due to its special printing properties. Claim. The use of such measures as the proper combination of fibers, strict control over the degree of beating of each pulp, and the enhancement of pulp washing, are still occurring from time to time. After testing, low-gelatinized spray starch was added between the surface layer and the liner, between the liner and the core layer, and at the same time, retention aids and filter aids were added to the slurry system to improve the water filtration capacity. After the above measures were taken, there was basically no separation phenomenon in the base paper in recent years, and at the same time, the stiffness of the coated white paperboard was increased by about 8%.

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