DPE grinding fluid

1,2-Diphenoxyethane plays a crucial role in thermal paper. Its primary function is as a sensitizer or solvent, making it a key additive in thermal coating formulations.

1. Lowering Melting Temperature and Improving Color Development Sensitivity

• Working Principle: Colorless dyes and developers are solid particles at room temperature, separated from each other. The heat generated by the printhead needs to be high enough to melt them and initiate the reaction. 1,2-Diphenoxyethane is an organic compound with a low melting point (approximately 50-55°C).

• “Mediator” Role: When heated, 1,2-Diphenoxyethane melts before the dye and developer, creating a localized molten solvent environment. This environment greatly promotes the contact, melting, and dissolution of the dye and developer particles.

• Effect: This allows the entire color development reaction to occur at a lower temperature and more rapidly. This means the printhead can achieve clear printing results without excessively high temperatures or long contact times, thus protecting the printhead, saving energy, and increasing printing speed.

2. As a reaction medium, ensuring uniform color development

• As a solvent in its molten state, it ensures that dye and developer molecules can mix and collide fully and uniformly.

• This helps to form a uniformly colored print with clear edges, avoiding spots, blurring, or discontinuities in the printed text or images.

3. Physical isolation effect (at room temperature)

• During the manufacturing process of thermal paper, 1,2-diphenoxyethane is ground into extremely fine particles and uniformly mixed with the dye and developer.

• In the dried coating, these components coexist tightly in solid particle form. The presence of 1,2-diphenoxyethane physically helps to isolate the dye and developer particles, preventing them from undergoing accidental pre-reactions due to physical pressure or slight heating at room temperature, thereby improving the storage stability of the thermal paper.