What are the main raw materials for producing small roll thermal label paper?

The main raw materials for producing small roll thermal label paper include the following:

1、 Paper based

Paper based is the supporting structure of thermal label paper, mainly made of cellulose fibers, which can come from wood, waste paper, etc. Paper substrates need to have good strength, ink absorption, and dimensional stability to ensure that the paper does not deform or break during the printing process. Meanwhile, the thickness and texture of the paper substrate can also affect the printing effect and clarity. For high-quality and long-lasting small roll thermal label paper, the paper base is usually made of pure wood pulp containing more than 90%. This is because pure wood pulp raw paper has uniform density, no impurities, good smoothness, and high flatness. In addition, less filler is added during the production process, and there will be no chemical reaction with the dye on the thermal coating layer.

2、 Thermal sensitive coating

Thermal sensitive coating is the core part of thermal sensitive label paper, mainly composed of the following components:

Colorless dye: It is colorless at room temperature, but can react chemically with a color developer when heated to produce colored compounds. The stability and reaction speed of this dye are crucial for the printing effect of thermal paper.

Chromogenic agent: usually a chemical substance with thermal reactivity, which can react with colorless dyes when heated to produce color. This reaction is instantaneous, so thermal paper can display clear text or images in a very short time.

Polymer: It plays a role in adhering thermosensitive pigments to paper substrates, ensuring the stability and durability of coatings.

In addition, thermosensitive coatings may also contain various chemical substances such as sensitizers, stabilizers, adhesives, etc. These components can undergo chemical reactions together under heating conditions, releasing colors and achieving ideal printing effects.

3、 Other additives

In order to improve the printing effect and paper performance of thermal label paper, some other substances will also be added, such as:

Lubricant: to reduce the wear of the print head and extend the service life of the printer.

Antistatic agent: to prevent paper from sticking due to static electricity during the printing process, which can affect the printing effect.

Moisture proof agent: to improve the moisture resistance of paper and ensure that label paper can maintain good printing performance in humid environments.

In summary, the main raw materials for producing small roll thermal label paper include paper-based materials, thermal sensitive coatings (colorless dyes, color developing agents, polymers, etc.), and other additives (lubricants, anti-static agents, moisture-proof agents, etc.). These raw materials work together in the production process of thermal label paper to ensure excellent printing performance and durability.