What is the production process of three proof thermal paper?

The production process of three proof thermal paper mainly includes the following steps:

1、 Raw paper selection

Choosing high-quality paper as the substrate is the foundation for ensuring the quality of three proof thermal paper. The base paper needs to have a certain thickness and strength to ensure stability and durability during subsequent processing and use.

2、 Surface treatment

The surface of thermal paper needs to be treated, usually through oxidation, corona discharge or plasma methods, to improve the coating performance of the paper surface, so that subsequent coatings can adhere more evenly to the paper.

3、 Coating preparation and coating

Preparation of coating: According to the performance requirements of the three proof thermal paper, prepare a thermal coating with characteristics such as water resistance, oil resistance, and high temperature resistance. This step involves the proportioning and mixing of multiple chemical substances to ensure that the coating can have the required performance.

Coating: Apply the prepared coating evenly onto the base paper. The coating method can be roll coating or spray coating, and precise control of the thickness and uniformity of the coating is required to ensure consistency and durability of the printing effect.

4、 Drying and solidification

After coating, the paper needs to be dried and cured. The purpose of this step is to firmly attach the coating to the paper and achieve the best printing effect. Drying methods may include air flow drying under low temperature conditions, rapid drying using ultraviolet lamps, etc.

5、 Add protective layer (optional)

In order to improve the durability and adhesion of the three proof thermal paper, sometimes a protective layer is added on top of the thermal coating. The protective layer can absorb some of the light that causes chemical reactions in the thermal sensitive coating, slow down the deterioration of the printing paper, and protect the thermal sensitive components of the printer from damage.

6、 Quality inspection and packaging

Conduct quality inspection on the manufactured three proof thermal paper to ensure that each batch of paper meets the specified standards. The testing content includes the flatness of the paper, the uniformity of the coating, the printing effect, and durability. After passing the inspection, subsequent processing such as cutting and packaging will be carried out to meet different market demands.

7、 Special processes (such as top coating process)

In the production process of some three proof thermal paper, top coating technology is also used to further enhance its performance. The top coating process usually involves coating a layer of top coating with special properties on the surface of thermal paper, followed by drying and curing treatment. This step can further improve the waterproof, oil resistant, and high-temperature resistance of the three proof thermal paper.

In summary, the production process of three proof thermal paper involves multiple steps and precise chemical treatment. Each step requires strict control of process parameters and quality standards to ensure that the performance and quality of the final product meet market demand.