What is the role of the coating link in the production process of long-acting heat-sensitive label p

In the production process of long-acting heat-sensitive label paper, the coating link plays a crucial role. The following is the main role of the coating process:

First, give three prevention characteristics

Waterproof, oil-resistant, scratch-resistant: During the coating process, one or more layers of special coatings are applied to the surface of the paper or film, which can give the heat-sensitive label paper waterproof, oil-resistant and scratch-resistant properties. This is one of the core advantages of long-acting thermal label paper, so that the label paper can keep the information clear and readable in a variety of harsh environments.

Second, protect the thermal sensitive coating

Increased wear resistance: The coating layer can also effectively protect the thermal sensitive coating and improve its wear resistance. During the use of the label paper, it is often subject to friction and wear, and the coating layer can reduce the direct impact of these external factors on the thermal coating, thereby extending the service life of the label paper.

Slow down chemical reactions: Some components in the coating layer can also absorb some of the light that causes the chemical reaction of the thermal coating, slowing the deterioration of the printing paper and helping to maintain the long-term performance of the label paper.

Third, improve the print quality

Uniform coating: The uniformity of the coating process has a direct impact on print quality. If the coating is not uniform, it will lead to dark colors in some places and light colors in some places when printing, and the print quality is significantly reduced. Therefore, the coating process needs to strictly control the formula, concentration, coating speed and other parameters of the coating liquid to ensure the uniformity of the coating.

Suitable for different printers: The heat-sensitive components in the coating liquid (such as colorless dyes and color development agents) can be designed to different activation temperatures according to needs to meet the needs of different performance printers. This allows for a wider range of applications for long-acting thermal label paper.

Fourth, enhance the durability of the label paper

Chemical stability: The chemicals in the coating layer are specially formulated to enhance the chemical stability of the label paper, so that it can keep the information clear and readable under the erosion of various chemicals.

Physical strength: The coating layer can also increase the physical strength of the label paper, such as tensile strength, tear strength, etc., so that it is not easy to damage during transportation, storage and use.

In summary, the coating link plays a crucial role in the production process of long-acting heat-resistant label paper. It not only gives the label paper triple-proof characteristics, protects the heat-sensitive coating, improves the print quality, but also enhances the durability of the label paper. Therefore, it is necessary to strictly control the parameters and process conditions of each link in the coating process to ensure the quality and performance of the final product.