sekundaarikuivaus

Sekundaarikuivaus refers to a process in the production of paper and cardboard products where the moisture content of the paper is reduced further after the initial drying stage. This is typically done to achieve a higher dryness level, often between 3% to 7% moisture, depending on the specific product requirements.

The main objective of sekundaarikuivaus is to prevent the growth of mold and bacteria, which can be challenging to control in high-humidity environments. By reducing the moisture content, the product becomes more resistant to damage and degradation caused by water and humidity.

Sekundaarikuivaus involves a secondary drying process, usually achieved through a combination of mechanical drying, such as infrared drying, or chemical drying using agents like silica gel or calcium chloride. The exact method used may vary depending on the type of paper or cardboard being produced and the desired end product properties.

There are several advantages to sekundaarikuivaus, including improved product shelf life, reduced risk of mold and bacterial growth, and enhanced storage and handling characteristics. However, the process may also impact the product's physical properties, such as increased stiffness or potential for brittleness.

As a result, sekundaarikuivaus is commonly used in industries where high-quality, durable products are required, such as packaging materials, printing papers, and paper cards. The process contributes to the widespread use of paper and cardboard products in various sectors, including consumer goods, food packaging, and document storage.