Humidity control in the production process of corrugated cardboard is a crucial link, which directly affects the quality, physical properties of the cardboard and the use effect of the final product. The following will discuss in detail how to effectively control the humidity of Corrugated cardboard.
First of all, from the moment raw materials enter the factory, the moisture content of corrugated base paper should be strictly inspected to ensure that it meets relevant standards. The storage environment is also key. The storage temperature of corrugated base paper should be controlled at normal temperature and the relative humidity should not be greater than 40% to prevent the cardboard from absorbing too much moisture. At the same time, attention should also be paid to the selection of storage locations. The ground should be ensured to be dry, and measures such as wooden pads should be used to absorb moisture from the ground. A certain gap should also be maintained when stacking cardboard to facilitate ventilation and heat dissipation.
On the production line, the production temperature and humidity control of Corrugated cardboard are equally important. Temperature directly affects the moisture content of corrugated base paper and the gelatinization of adhesive. Therefore, when the corrugated cardboard production line is running, the temperature should be adjusted according to the production speed, usually between 160°C and 180°C, to ensure that the corrugated base paper and single-sided corrugated cardboard are The moisture content of cardboard is moderate. In addition, adjusting the preheating area according to the moisture content of corrugated base paper is also an effective control method. When the moisture content is too high, the preheating area is increased, and when the moisture content is too low, it is reduced.
During the humid season, the moisture resurgence of cardboard is particularly obvious. At this time, the water absorption control standards of the base paper should be improved, the sizing degree of the base paper should be strengthened, and appropriate ventilation and methods to reduce the moisture absorption of the cardboard should be adopted, such as using stretch film or heat shrink film. Base paper and cardboard are used for packaging to reduce the impact of weather on the softening of cardboard.
In addition, from the perspective of chemical waterproofing and moisture-proofing, the moisture-resistant performance of Corrugated cardboard can also be effectively enhanced by adding water-resistant ingredients to the pulp or performing waterproofing through a post-coating process.
In summary, humidity control in the production process of corrugated cardboard is a systematic project, which requires comprehensive measures from multiple aspects such as raw materials, storage environment, production temperature, ventilation conditions, and waterproofing to ensure the stability and quality of corrugated cardboard. excellent.
