What is the working principle of the three heat-proof label paper?

The working principle of the heat-proof label paper is mainly based on the heat-sensitive reaction principle, and combined with a special protective layer technology to achieve waterproof, oil-proof, anti-wear effect. The following is a detailed analysis of its working principle:

Principle of thermal reaction

1.Thermal coating: The three thermal label paper adds one or more layers of special functional coating on the basis of ordinary thermal paper. Among them, the heat sensitive coating is a key part, which usually contains colorless dyes (such as acetic acid or other acidic substances) and color developing agents.

2.Color reaction: When the thermal label paper is printed by a thermal printer, the heat of the print head acts on the thermal coating, causing a chemical reaction between the colorless dye and the color developer, thus forming a clear text or image on the label paper. This process does not require ink or carbon tape, so it has the advantages of fast printing speed, low noise, and easy operation.

Three protection layer technology

1.Waterproof layer: In order to achieve waterproof effect, the three heat-proof label paper is coated with a waterproof layer on top of the heat-sensitive coating. This waterproof layer can effectively block the penetration of water and protect the heat-sensitive coating from water erosion, thus extending the service life of the label paper. It should be noted that the waterproof here is not a full sense of waterproof soaking, but can resist the invasion of water droplets or water mist within a certain period of time.

2.Oil-proof layer: The oil-proof layer uses special chemicals (such as polyvinyl chloride, etc.), which have excellent oil resistance and can effectively prevent the pollution and erosion of grease on the heat-sensitive coating. In supermarkets, restaurants and other frequent contact with oil in the environment, the oil layer is particularly important.

3.Anti-wear layer: The anti-wear layer is usually located in the outermost layer of the label paper. It is made of a material with strong wear resistance, which can resist friction and scratching in daily use, and protect the text or image on the label paper from being easily worn away. This is crucial for labels that need to be stored and used for a long time.

In summary, the working principle of the three heat-resistant label paper is to realize the printing of text or images through the heat-sensitive reaction principle, and to extend the service life of the label paper and maintain the clear and durable printing effect by combining the waterproof, oil-proof and anti-wear protective layer technology. This kind of label paper is widely used in logistics, medical, retail and other fields, providing a convenient and efficient identification solution for various application scenarios.