How is the waterproof treatment of three proof thermal paper achieved?

The waterproof treatment of three proof thermal paper is mainly achieved through the following methods:

1、 Surface coating treatment

During the production process of the three proof thermal paper, a special protective layer will be applied on top of the thermal coloring layer. This protective layer has undergone special treatment to make it waterproof. When water droplets fall on the surface of the paper, the protective layer can form a barrier to prevent moisture from penetrating into the inside of the paper, thereby protecting the printed information from being blurred by water. This waterproof coating usually has good wear resistance and scratch resistance, ensuring that the waterproof effect remains significant even after long-term use and frequent touch.

2、 Paper material selection

In addition to surface coating treatment, the waterproof performance of three proof thermal paper is closely related to the choice of paper material. Some high-end three proof thermal paper is made of special fiber materials, which themselves have good waterproof performance. At the same time, the density and structure of the paper are carefully designed to ensure that moisture is difficult to penetrate.

3、 The use of waterproof additives

During the production process, waterproof additives can also be added to the paper pulp. These additives can tightly bond with paper fibers to form a dense waterproof layer. When moisture comes into contact with the surface of the paper, this waterproof layer can quickly repel the moisture, thereby protecting the inside of the paper from moisture erosion.

4、 Waterproof testing and quality control

In order to ensure that the waterproof performance of the three proof thermal paper meets the requirements, manufacturers usually conduct strict waterproof tests on the paper. These tests include simulating scenarios such as rainwater infiltration and water droplet penetration to evaluate the waterproof effect of paper. At the same time, manufacturers will strictly control the quality of paper to ensure that each batch of paper has stable waterproof performance.

In summary, the waterproof treatment of three proof thermal paper is mainly achieved through surface coating treatment, paper material selection, use of waterproof additives, and waterproof testing and quality control. These measures together ensure that the three proof thermal paper has excellent waterproof performance and can meet the needs of various harsh environments.