Honeycomb paperboard application prospect

As a kind of paper packaging material, honeycomb paperboard has been accepted by users at present, and honeycomb paperboard products save the resources, protect the ecological environment, and accord with the development trend of international packaging industry materials. Therefore, in the international convergence, the market prospect of honeycomb paperboard products is very high. broad.

However, honeycomb paperboard manufacturers often have quality problems due to poor control. At present, the common quality problems are generally: Honeycomb paperboard is made of starch glue, which tends to be longer and moldy. Adhesive quality is not good. The upper and lower sheets of paper will open a large area of ​​plastic. When the paperboard is bent, it will cause the upper layer to break the lower paper. Release separation; Honeycomb paperboard is easily broken when impacted; Honeycomb paperboard is soft, press down will cause significant sagging; Core sizing quality is not good, the core layer has many holes, easy to stretch and fracture, local vacuole of honeycomb paperboard Easy to deform; for various reasons, the paper is not even, wrinkles or warping.

How to solve the quality problem of honeycomb paperboard? According to industry analysts, the first step is to pick up the honeycomb base paper used for honeycomb paperboard (referring 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 120~180g/m2, the paper weight is between 200~500g/m2; the paper's directionality is determined: In the production of honeycomb paper, when the fiber orientation of the core paper is perpendicular to the paper surface of the honeycomb, its compressive strength is 10% higher; note that 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 general 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 honeycomb core has a ring pressure of 4.4 to 5.5 nm per gram, and the face paper has a ring pressure of about 6.5 nm per gram.

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 bonding 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 peel strength, shear strength, and compressive strength of the honeycomb paperboard, the choice of the adhesive is one of the important factors related to the quality of the honeycomb paperboard.

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