What is the working principle of PET thermal sensitive silver paper?

The working principle of PET thermal sensitive silver paper is mainly based on thermal printing technology. The following is its detailed working principle:

1、 Fundamentals of thermal printing technology

Thermal printing technology is a printing method that generates images or text by heating specific areas to trigger chemical reactions. This technology has been widely used in PET thermosensitive silver paper.

2、 Composition of PET thermal sensitive silver paper

PET thermosensitive silver paper is mainly composed of a PET substrate and a thermosensitive coating layer covering its surface. This thermal sensitive coating contains special chemicals, namely latent dyes and acidic substances. Hidden dye itself is colorless, and at room temperature, PET thermosensitive silver paper looks no different from ordinary paper.

3、 Working principle

Heating process:

When PET thermal silver paper is placed in the thermal printer, it will be transported forward by the drum and come into contact with the print head.

The surface of the print head has many tiny semiconductor components that can heat specific areas of the paper according to the text or graphics to be printed.

Chemical reaction:

At the moment when the thermal paper comes into contact with the print head, the high temperature generated by the print head melts the latent dye and acidic substances in the thermal coating into a liquid.

After these freely moving molecules meet, they immediately undergo a chemical reaction, causing the originally colorless dye to display color.

Image or text generation:

Through the above chemical reaction, text or graphics corresponding to the heating area of the print head will appear on the surface of PET thermosensitive silver paper.

4、 Advantages

Fast speed: Thermal printing technology has the ability to print at high speeds, making it very suitable for situations where rapid label generation is required.

Low noise: Compared with traditional printing methods, thermal printing has lower noise and provides a quieter working environment.

Clear printing: PET thermal sensitive silver paper can present clear and delicate printing effects, meeting the needs of high-quality printing.

In summary, the working principle of PET thermal sensitive silver paper is based on thermal printing technology, which triggers chemical reactions by heating specific areas to generate images or text on the surface of the paper. This technology has the advantages of fast speed, low noise, and clear printing, and has a wide range of applications in multiple fields.