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Precision flowability and storage stability. Our hydrophilic fumed silica acts as a physical nano-barrier between resin particles, preventing clumping and ensuring flawless electrostatic application.
Reduce friction. Our product is recognized as the best fumed silica for powder coating free flow, acting as nano-ball bearings that allow dry powder to move like a liquid during processing.
Protect against humidity. Storage in warm conditions often leads to sintering. Our silica serves as a highly efficient anti-caking agent for powder coatings, maintaining a dry, flowable state long-term.
Steady spray delivery. Using SEMITECH as a fluidization aid silica ensures a consistent "boiling" effect in the fluid bed, leading to pulse-free powder delivery to the electrostatic spray gun.
Maximum coverage efficiency. Our hydrophilic fumed silica 200 BET offers the perfect balance—providing enough surface area to coat resin particles without causing excessive dusting or handling issues.
Solutions for flowability, storage, and electrostatic spray challenges.
Without a fluidization aid silica, powder particles tend to clump due to mechanical friction and static. Our fumed silica coats the resin, improving chargeability and ensuring the powder flows smoothly through the hoses to the gun without surging.
Typically, addition levels range from 0.2% to 0.5% by weight. It is best added during the dry-blending stage (post-extrusion) to ensure the silica aggregates are distributed on the surface of the ground powder particles.
Yes. As a high-performance anti-caking agent for powder coatings, SEMISIL creates a physical spacer between resin particles. This prevents them from fusing together (sintering) when exposed to high ambient temperatures during shipping or storage.
When used at recommended levels, hydrophilic fumed silica 200 BET has zero negative impact on film leveling or gloss. In fact, by improving the uniformity of the powder application, it often helps achieve a smoother, more consistent finish.
For most standard epoxy, polyester, and hybrid powders, hydrophilic fumed silica is the industry standard for free-flow. However, for powders used in extremely high-humidity environments, our hydrophobic grades can provide additional moisture protection.
For universal free-flow and anti-caking performance, we recommend SEMISIL 200 (Hydrophilic).