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Press release
15.02.2013  |  16373x
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Glatt HS-Wurster-Process for Bottom-Spay-Coating

3D-Animation to the process

The Wurster process is one of the key methods of applying active ingredients or functional layers to particles. The high reliability and efficiency of this method have made it a mainstay of process technology.
Glatt has created an illustrative 3D animation of our patented Wurster process for interested experts and laymen alike.

Particles are coated in order to change their surface properties and by this means the behavior of the particles: stability in storage, hygroscopicity, free flowing property, surface structure, solubility, appearance, taste, odor

Glatt offers different processes for the coating of different particles. This equipment choise allows the customer to choose specific levels of coating quality. The coating liquid can be a solution, suspension or melt. In all processes the coating liquid is sprayed onto the particles. Low viscosity and small droplets are required to ensure even spreading of the coating liquid on the surface of the particles.

The Wurster process allows a 100% coating with small amounts of coating material. The particles in the fluid bed are passing the bottom spray nozzle in an ordered flow pattern. While quickly moving upwards within the Wurster compartment they can be wetted without the danger of agglomeration. While moving downwards outside the Wurster compartment they dry and another layer of coating can be supplied. The exactly controlled residence time in the coating zone ensures a very uniform coating.

Company information

Glatt Ingenieurtechnik GmbH
Glatt Ingenieurtechnik GmbH
Glatt is specialized in intelligent particle design for the generation and functionalization of powders and granulates with defined, adjustable properties. The focus is on particles and powders for pigments, catalytic, ceramic or battery materials as well as for granules and pellets as additives for e.g. industrial salts, detergents and cleaning agents, fertilizers, pesticides, food, feed, dietary supplements and pharmaceuticals. Encapsulation of flavors, enzymes, vitamins, microorganisms, probiotics or fatty acids (PUFA) is just as possible as encapsulation of essential oils and other active, sensitive substances to be protected. With Glatt APPtec®, a unique technology for spray calcination, it is possible to generate, coat and then calcine particles in a pulsing hot gas stream in a single process step. As a pioneer in fluid bed and spouted bed technologies, Glatt masters these important processes for the formulation and optimization of particle properties through defined spray agglomeration, spray granulation, spray coating or (micro)encapsulation as well as through combinations of these processes. Also in the high temperature range. Glatt supports the product idea from the early phase of product formulation through process development to scale-up to production scale. Under the leadership of the Glatt Process & Plant Engineering teams, customized production plants for nutrition, fine chemicals, pharmaceuticals, and biotech applications are successfully planned and commissioned. Worldwide. Whether based on powder synthesis, fluid bed or spouted bed technology, Glatt also offers certified contract manufacturing for customers without their own production capacities.
Last update: 27.02.2024

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