Coating: Protection of sensitive Particles
Starting Materials Coating
Liquids, aqueous solutions, suspensions, aqueous emulsions, hot melts, melt emulsions, melt suspensions delivered as such, or prepared in our conditioning lines are sprayed onto particles and granulates held under fluidization. We already used a lot of different coating materials successfully.
Process Technology Coating
Coating enfolds the plating or encapsulation of sensitive particles. Through coating, the surface morphology of precursors can be influenced systematically. Macroscopic particles (from 150 µm to 5 mm) can be coated with water-soluble or hydrophobic systems based on
- aqueous solutions or emulsions
- hot melts
Sensitive materials can thus be protected from external influences (e.g. humidity, oxidation) or internal incompatibilities with other components within a formulation.
Coating materials may react when “triggered” e.g. by enzymes, pH or temperature changes releasing the actives into the system (“Controlled-Release Mechanisms”). A “Slow-Release” of actives is also possible through gradual solubilization of water-soluble layers, or diffusion through insoluble, semi-permeable coating systems. Both systems can be calibrated and steered via precise selection of coating materials.
Results and Benefits Coating
- Homogeneous distribution of coating material on individual particles
- Protection of particles against external influences
- Protection against internal incompatibilities
- Specific “Controlled-Release Mechanisms”
- Controlled semi-permeable diffusion (“Slow-Release”)
- Improved storage stability
- Good tabletting properties
- Influence on product properties (e.g. hygroscopicity, odor, flowability, surface morphology, visual appearance, solubility)