Several Methods to Solve the Quality Problem of Honeycomb Paperboard

As a kind of paper packaging material, honeycomb paperboard has been accepted by users. Honeycomb paperboard products save the resources, protect the ecological environment, and conform to the development trend of international packaging industry materials. Therefore, the market prospect of honeycomb paperboard products is in line with international standards. Very broad.

However, honeycomb paperboard manufacturers often have quality problems due to poor control. The common quality problems are as follows: Honeycomb paperboard is made of starch glue, which tends to be moldy for a long time. The quality of glue penalties is not good. The upper and lower sheets of paper will open the glue over a large area; when the paperboard paper is bent, it will cause the upper layer to break down. Paper separation; Honeycomb paperboard is easy to break when subjected to impact; Honeycomb paperboard is soft, and when pressed by hand, there will be significant sagging; Core sizing quality is not good, the core layer has many holes, and it is easily stretched and cracked. Cavities are easily deformed; for various reasons, the paper is not even, wrinkles, or warping.

How to solve the quality problem of honeycomb paperboard? According to analysis and introduction in the industry, the first step is to pick up the honeycomb base paper used in the honeycomb paperboard (refer to the honeycomb paper and honeycomb core paper). According to the actual situation, select the paper quantitative: the core paper of honeycomb paperboard is the basis weight of corrugated paper, which is generally between 120 and 180 g/ ^m2 , and the amount of dough paper is between 200 and 500 g/ ^m2 ; the directionality of the paper is determined: In the production of honeycomb paper, when the fiber orientation of the core paper is perpendicular to the honeycomb paper, its compressive strength is higher by 10%; note the moisture content of the paper: moisture has a significant effect on the flexibility, elasticity and strength of the paper. The moisture content of the honeycomb paperboard base paper is between 8 and 12%; the ring pressure strength of the paper is selected: the higher the ring pressure strength, the higher the flat compressive strength of the honeycomb paperboard, and the higher its carrying capacity. In general, the core crush strength of the honeycomb core paper is in the range of 4.4 to 5.5 nm/g, and that of the tissue paper is about 6.5 nm/g.

Secondly, choose the adhesive used in the production of honeycomb paperboard. At present, most of honeycomb paperboard uses corn starch glue and white latex glue. Corn starch has a slightly higher solid content, but has many defects, such as low adhesive strength, brittleness, aging resistance, poor moisture resistance, and mildew. White latex is generally of stable quality, high rate of manufacture and elongation, fast drying, good strength, high solid content, long service life, and is suitable for large-area operations. Since the quality of the adhesive directly affects the peeling strength, shear strength, and compressive strength of the honeycomb paperboard, the choice of the adhesive is also one of the important factors related to the quality of the honeycomb paperboard.