What is the production process of long-acting heat-sensitive label paper?

The production process of long-acting thermal label paper is a complex and delicate process, which involves several key steps. The following is the general process of its production process:

1. Base paper selection

The bottom layer of thermal paper is the paper base, and high-quality paper with a certain thickness and strength is usually selected as the base material. This is to ensure that during the printing process, the paper can maintain stability and durability, so as to meet the needs of various application scenarios.

2. Heat sensitive coating

Thermal coating is a key part of thermal paper, which determines the thermal characteristics and color rendering effect of the paper. Thermal coatings are mainly composed of thermal pigments (such as colorless dyes, phenols or other acidic substances), polymers and other additives. These components can undergo chemical reactions when exposed to heat, thereby releasing color.

It is an important step in the process of making thermal paper to evenly coat the prepared thermal sensitive coating on the base paper. This step requires precise control of the thickness and uniformity of the coating to ensure consistent print results. Typically, manufacturers use rollers or other coating equipment to complete this process.

3. Dry and cure

After coating is complete, the paper needs to be dried and cured to allow the coating to firmly adhere to the paper and achieve the best printing results. There are a variety of drying methods, including air drying at low temperatures and rapid drying using ultraviolet lamps. These drying methods not only help to remove moisture from the coating, but also ensure the gloss and flatness of the coating.

4. Coating with three protective layers

In order to improve the durability and adhesion of the thermal sensitive paper, and increase the waterproof, oil and friction resistance, a layer of three protective layers will be covered on the thermal sensitive coating. This protective layer is usually composed of special chemicals that absorb some of the light that causes the chemical reaction of the thermal coating, slow down the deterioration of the printing paper, and protect the thermal components of the printer from damage.

5. Perform subsequent operations such as cutting and packaging

According to different market needs, the paper is slitted, packaged and other follow-up treatment. Thermal paper is generally sold in the form of rolls, common specifications such as 80mm×Φ60mm, 57mm×Φ50mm and so on.

6. Quality inspection

In the entire production process, it is necessary to carry out strict quality testing on raw materials, semi-finished products and finished products to ensure that the quality of thermal paper meets the standards and customer requirements. The test content includes the flatness of the paper, the uniformity of the coating, the printing effect and the durability.

Through the above steps, the long-acting three heat sensitive label paper can be produced. This kind of label paper not only has excellent waterproof, oil-proof, anti-friction performance, but also can show a clear and durable printing effect in the printing process, and is widely used in modern logistics and information management and other fields.