Polymer coating process using dry glidant in a rotor processor
AssigneeVector Corporation
InventorsSHAWN M. ENGELS, BRIAN K. JENSEN
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Abstract
A method is provided for applying polymers to coat particulate cores in a rotor processor. The processor is actuated to create a circulating bed of cores in the rotor chamber. Dry powdered glidant is introduced into the rotating bed of cores, which are simultaneously sprayed with a polymer solution. The glidant enhances processability by eliminating or minimizing agglomeration of the cores. Air from above and below the rotating bed evaporates the solution to leave a polymer layer on the cores. Layers of polymer build up on the cores until a desired thickness is achieved.
Claims20
A method of applying a polymer coating to particulate cores in a rotor processor, comprising:
- loading the cores into the processor;
- rotating a rotor in the processor;
- supplying air to flow upwardly through a slit between a perimeter edge of the rotor and a cylindrical wall of the rotor
- whereby the rotating rotor and upwardly flowing air create a circulating bed of cores;
- spraying a polymer solution/dispersion into the rotor chamber and onto the circulating cores to provide a polymer layer on the cores;
- and
- introducing dry glidant into the rotor chamber to reduce agglomeration.
An improved method of applying a polymer layer to particles in a rotor processor, comprising:
- creating a rotating bed of particles in a rotor chamber of the processor;
- spraying a polymer solution onto the particles in the rotor chamber;
- and
- introducing dry glidant powder into the rotating bed to inhibit agglomeration.
Dependencies are inferred from the claim text.