What are the methods for drying and curing three proof thermal paper?

The drying and curing process of the three proof thermal paper is a key step in the production process to ensure that the coating is firmly attached to the paper and achieves the best printing effect. Here are some commonly used drying and curing methods:

Drying methods

1. Hot air drying:

Using hot air to dry the coated paper, the moisture on the surface of the paper is carried away by the flow of hot air, achieving rapid drying.

This method is suitable for large-scale production and has high efficiency.

2. Infrared drying:

Using infrared radiation to heat paper and evaporate the moisture in the coating, achieving the purpose of drying.

Infrared drying has the advantages of uniform heating, fast speed, and energy saving.

3. UV curing:

Although mainly used for curing certain special coatings, ultraviolet radiation can also be used to promote the drying and curing of coatings in the production of certain three proof thermal paper.

UV curing has the advantages of fast curing speed, high efficiency, and environmental friendliness.

Curing methods

1. Natural solidification:

Place the coated paper in a natural environment and gradually cure the coating through natural evaporation and chemical reactions.

This method is suitable for situations where high curing speed is not required.

2. Heating curing:

Heating the paper through a heating device accelerates the chemical reaction in the coating, allowing the coating to cure quickly.

Heating and curing can improve production efficiency and ensure coating quality.

3. Chemical curing agent:

Add chemical curing agents to the coating to cure it through chemical reactions.

This method requires strict control over the type and amount of curing agent to ensure the performance and safety of the coating.

In the actual production process, drying and curing treatments are often combined to achieve the best drying and curing effect. At the same time, it is necessary to choose appropriate drying and curing methods based on factors such as paper material, coating type, and production scale.

In addition, in order to ensure the quality of the three proof thermal paper, it is necessary to conduct strict quality inspections on the dried and cured paper, including the flatness of the paper, the uniformity of the coating, the printing effect, and durability. Only paper that has undergone comprehensive testing and meets the standards can be used for subsequent production and applications.