How does the thermal coating of BOPP color thermal synthetic paper work?

The thermosensitive coating of BOPP colored thermosensitive synthetic paper works through a specific chemical reaction to achieve its working mechanism. The following is a detailed explanation of the working mechanism of thermal sensitive coatings:

1、 Composition of thermal sensitive coating

The thermal sensitive coating of BOPP colored thermal sensitive synthetic paper mainly contains colorless dyes (also known as latent dyes) and color developing agents. These chemicals exist in the form of microcapsules or uniformly dispersed in the coating.

2、 Working principle

Heat reaction: When the thermal print head applies heat to the paper, the colorless dye and color developer in the thermal coating begin to undergo a chemical reaction. This reaction is triggered by heat, so temperature control of the thermal print head is crucial for the printing effect.

Color development: During a chemical reaction, colorless dyes combine with colorants to produce color changes. This color change is instantaneous, so thermal printing technology can achieve fast and instant printing effects.

Image or text formation: As the thermal print head moves on the paper and heats the paper locally according to the image or text information that needs to be printed, the thermal coating changes color in the heated area, thereby forming clear images or text.

3、 Influencing factors

Temperature: High temperature is one of the important factors causing the fading of thermal sensitive synthetic paper. When the ambient temperature is too high, the chemicals in the thermosensitive coating may accelerate the reaction, making the color unstable and even fading. Therefore, attention should be paid to avoiding high temperature environments during use.

Humidity: Humidity may also affect the color stability of thermosensitive synthetic paper. In high temperature and high humidity environments, paper is prone to moisture, which may accelerate the color change process.

Light exposure: Prolonged exposure to sunlight or strong light may cause images on paper to gradually fade. This is mainly due to the significant impact of ultraviolet radiation on the color stability of thermosensitive synthetic paper.

4、 Application advantages

The thermal coating technology of BOPP color thermal synthetic paper has multiple application advantages:

Quick Printing: Achieving fast and instant printing results without the need for ink or ribbon.

Color images or text: capable of printing vibrant and long-lasting color images or text, enhancing the visual experience.

Environmentally friendly and sustainable: Its production process is pollution-free, and the materials can be recycled and reused, meeting the requirements of modern green packaging and environmental protection concepts.

In summary, the thermosensitive coating of BOPP colored thermosensitive synthetic paper achieves color development through a chemical reaction between colorless dye and color developer triggered by heat. This technology has advantages such as fast printing, color printing, and environmental sustainability, and has been widely used in multiple fields.