In industries such as coatings, inks, and plastics, the uniformity and stability of pigment particle dispersion directly determine the product's tinting strength, hiding power, and durability. Traditional dispersion technologies are often limited by the problem of particle agglomeration, while ultrasonic dispersion equipment, with its unique technical principle, has become a key piece of equipment for overcoming this predicament.
The core advantage of ultrasonic dispersion equipment stems from its working mechanism based on the "cavitation effect." The equipment converts electrical energy into high-frequency mechanical vibration through a generator. After being transmitted to the dispersion medium via a transducer, it alternately creates high-pressure and negative-pressure zones. In the negative-pressure phase, a large number of tiny bubbles are generated in the medium; in the positive-pressure phase, the bubbles rapidly collapse, instantly releasing ultra-high pressure and high-speed microjets. This energy is sufficient to break the van der Waals forces and hydrogen bonds between pigment particles, dissociating micron-sized aggregates into nano-sized primary particles. Simultaneously, the mechanical and ionic effects generated by the high-frequency vibration optimize the surface charge state of the particles, laying the foundation for subsequent stable dispersion.
Ultrasonic equipment exhibits significant advantages in dispersion efficiency and effectiveness. Compared to traditional grinding equipment, its dispersion time can be reduced to 1/5, and it can achieve fine dispersion with a particle size D50 of less than 1μm, making it particularly suitable for easily agglomerated pigments such as carbon black and titanium dioxide. More importantly, the equipment's focused energy design allows pigment particles to be evenly distributed in the medium, avoiding localized concentration differences and effectively improving product color consistency.
Stabilization treatment is another core value of ultrasonic dispersion equipment. While breaking up particle agglomerates, the equipment accelerates the adsorption process of dispersants on the pigment surface, forming a dense and stable adsorption layer, fundamentally inhibiting particle re-agglomeration. In water-based coating production, pigment systems treated with this equipment can achieve no hard sedimentation for 6 months; in UV inks, it can increase light transmittance to over 90%, significantly enhancing product storage and usage stability.
With the increasing demand for refinement and stabilization in the pigment industry, ultrasonic dispersion equipment is driving the industry towards high efficiency and green practices. It not only solves the dispersion bottlenecks that traditional processes struggle to overcome, but also provides reliable support for upgrading pigment product performance through technological innovation, becoming an indispensable key piece of equipment in modern industrial production.
