Production of wax capsules containing liquid hydrophilic cores
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United States of America Patent
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Aug 18, 2020
Grant Date -
Jan 1, 2009
app pub date -
May 29, 2008
filing date -
May 31, 2007
priority date (Note) -
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Abstract
Provided is a method for cooling wax after coextrusion to create wax capsules. The method includes immersing a concentric nozzle of a coextruder in a container of heated alcohol. The container of heated alcohol sits in a water-ice bath to create a temperature gradient. A core material having a wax coating is extruded through a concentric nozzle to form a capsule. The capsule enters the container of hot alcohol where the wax coating is solidified. In an embodiment, the method is a continuous method including a capsule and solvent transfer system.
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