Philip Morris USA Inc.

Philip Morris Products S.a.

Hongwei Liu

Georgios D Karles

Shuzhong Zhuang

Daqing Wu

Yi Zeng

Jose Nepomuceno

José Nepomuceno

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.

Production of wax capsules containing liquid hydrophilic cores

A process for producing a coated filter plug for a smoking article including: (a) incorporating an additive to a porous filter plug, thereby obtaining an impregnated filter plug; (b) coating a surface of the impregnated filter plug with a cross-linkable polymer material; and (c) cross-linking the cross-linkable polymer material, to form a cross-linked, breakable coating substantially enclosing the impregnated filter plug. The process may further include at least partially coating the impregnated filter plug with a cross-linking agent prior to, or subsequent to, coating with the cross-linkable polymer material.

Coated impregnated porous filter plug

Multi-shelled capsules are made by co-extruding a first liquid flavorant composition and a first shell-forming polymeric material to form droplets which are hardened to form an inner shell containing a first liquid flavorant composition, and then coated with a second shell-forming polymeric material which is hardened to form an outer shell. The result is a capsule where the inner surface of the outer shell is separate and/or separable from the outer surface of the inner shell to define a space, wherein a second liquid flavorant composition may be located.

Fabrication of core/shell capsules of different geometries and treatment thereafter

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Appleton, WI, United States of America

Hongwei Liu