What is the thermal coating component of transparent thermal label paper?

The thermal coating components of transparent thermal label paper mainly include color formers, color developers and sensitizers, which work together to make the label paper display clear images or text when heated.

Detailed explanation of thermal coating components

1.Color forming agent:

Color formers are one of the key components in heat-sensitive coatings, which are responsible for the chemical reactions that occur when heated to produce color. The common color forming agents are bisphenol A and its derivatives, p-methylbenzaldehyde and so on. These compounds undergo structural changes when stimulated by heat, resulting in the appearance of a specific color, usually black or another designed color.

2.Color developing agent:

The color developer plays an auxiliary role in the thermal sensitive coating, and it is usually used in combination with the color creator to enhance the color display effect through chemical reaction. The type and proportion of color developing agent will affect the printing quality and color stability of thermal label paper.

3.Sensitizer:

The sensitizer is mainly used to improve the sensitivity of the thermal coating, so that the label paper can be quickly colored at a lower temperature. The common sensitizing agents include fluorobenzene containing benzene sulfonate and so on. The addition of the sensitizer can optimize the performance of the thermal sensitive coating and improve the printing efficiency and quality.

Other auxiliary components

In addition to the main ingredients mentioned above, the thermal coating of transparent thermal label paper may also contain the following auxiliary ingredients:

Fillers: such as calcium bicarbonate, etc., used to regulate the physical properties of the coating, such as viscosity, fluidity, etc.

Adhesive: such as polybutadiene formate, used to enhance the adhesion between the coating and the paper base, to prevent the coating from falling off.

Thickener: such as dibenzoyl terephthalate, used to regulate the consistency of the coating to make it easier to apply and dry.

Lubrication fluid: Used to improve coating performance and print head wear.

Matters needing attention

The specific composition of thermal coatings may vary depending on factors such as manufacturer, product specifications and use. Therefore, when choosing transparent thermal label paper, it is necessary to choose the right product according to the actual needs and use environment.

The thermal coating of transparent thermal label paper is more sensitive to environmental factors such as temperature and humidity, so it is necessary to pay attention to the storage conditions and use environment during use, so as not to affect the print quality and storage time.

In summary, the thermal coating composition of transparent thermal label paper is complex and diverse, including color forming agent, color developing agent, sensitizer and a variety of auxiliary components. These ingredients together make the label paper has excellent printing performance and a wide range of application prospects.