What are the main components of small roll thermal label paper?

The main components of small roll thermal label paper include the following parts:

1、 Thermal sensitive coating

Thermal sensitive coating is a key component of thermal sensitive label paper, which is composed of various chemical substances that undergo chemical reactions when heated, thereby displaying the required graphic and textual information. The main components of thermal sensitive coatings usually include:

Thermal sensitive pigments (colorants): These are the components in thermal sensitive coatings that can undergo color changes. When heated, thermosensitive pigments undergo decomposition or recombination, resulting in color. Commonly used thermosensitive pigments include glucose, lactose, etc. There are also claims that thermosensitive dyes belong to a type of thermosensitive pigment.

Color developer: Color developers play a role in promoting color development in thermal reactions. It is dispersed in the filler together with the thermosensitive pigment. When the thermosensitive pigment decomposes under heat, the color developer reacts with it, causing the colorless dye to become colored.

Resin: Resin is a curing material that can cure, increase adhesion, and improve surface hardness of thermosensitive coatings. Common resins include aliphatic resins and epoxy resins.

Catalyst (sensitizer): Catalyst is an important raw material for catalytic reactions, which can increase the decomposition rate of thermosensitive pigments in thermosensitive coatings, thereby improving printing speed and quality. Common catalysts include organotin compounds, organobismuth compounds, etc. There are also claims that weakly acidic developers or long-chain aliphatic compounds (as fillers, melting point 45-65 ℃) are also a type of catalyst or sensitizer.

2、 Paper based and adhesive layer

In addition to the thermosensitive coating, small roll thermosensitive label paper also includes a paper base and an adhesive layer. Paper based materials serve as supporting materials, carrying thermal sensitive coatings to maintain flatness and stability. The adhesive layer is used for sticking and fixing, ensuring that the label can be firmly attached to the desired item.

3、 Other components

According to specific needs and purposes, other ingredients such as waterproofing agents and oil proofing agents may be added to small roll thermal label paper to improve its waterproof and oil proofing performance.

In summary, the main components of small roll thermal label paper include thermal sensitive coatings (thermal pigments, color developing agents, resins, catalysts, etc.), paper-based and adhesive layers, as well as other ingredients added according to specific needs. These components together make up the small roll thermal label paper, which has a fast and convenient printing method and good usability.