What is the working principle of the three proof thermal paper?

The working principle of the three proof thermal paper is mainly based on its special thermal coating and the heat generated by the print head. The following is a detailed explanation of the working principle of the three proof thermal paper:

1、 Structure of thermal paper

Thermal paper is a type of processed paper that typically consists of three layers: the bottom layer is the paper base, the second layer is the thermal coating, and the third layer is the protective layer. Thermal sensitive coating is a key component of thermal paper, which contains a special thermal sensitive chemical material that undergoes color changes when heated. The protective layer is used to improve the durability, waterproof, oil resistant, scratch resistant and other properties of thermal paper.

2、 Printing principle

Heat transfer: When the print head of a thermal printer comes into contact with thermal paper, the print head generates heat. This heat is transferred to the thermosensitive chemical material through the coating of the thermosensitive paper.

Chemical reaction: Thermally sensitive chemical materials undergo a chemical reaction when stimulated by heat, resulting in a color change. This color change is usually irreversible, meaning that once it occurs, it will be permanently retained on the paper.

Image formation: The print head heats the thermal paper point by point according to the predetermined image or text information. Each heating point triggers a color change in a small area of thermosensitive chemical material, forming a complete image or text.

3、 Implementation of three defensive performance

The reason why the three proof thermal paper has waterproof, oil resistant, scratch resistant and other properties is mainly because a special protective layer is added to the thermal coating. This protective layer can effectively block external factors such as moisture, grease, and scratches, thereby protecting the thermal sensitive coating from damage. At the same time, this protective layer can also improve the durability and clarity of thermal paper, making the printed images or text more durable and clear.

4、 Application and advantages

Three proof thermal paper is highly favored due to its unique properties and wide range of applications. It is usually used for printing tasks that require long-term storage or exposure to harsh environments, such as hospital electrocardiogram recording paper, fetal monitor recording paper, etc. In addition, three proof thermal paper is widely used in retail, logistics, catering and other fields for printing labels, receipts, etc.

Its advantage lies in the fact that it does not require ribbon printing, is easy to operate, cost-effective, and has clear and durable handwriting. However, it should be noted that the handwriting retention time of three proof thermal paper is relatively short and not suitable for situations where information needs to be stored for a long time.

In summary, the working principle of the three proof thermal paper is mainly based on its special thermal coating and the heat generated by the print head. Forming images or text through chemical reactions, and improving durability and waterproof, oil resistant, scratch resistant and other properties through protective layers.