Coated impregnated porous filter plug
AssigneePhilip Morris USA Inc.
InventorsGeorgios Karles, Shuzhong Zhuang, Yi Zeng, Hongwei Liu, Daqing Wu
Life of this patent
Estimating the term…
Abstract
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.
Claims10
A process for producing a coated filter plug for a smoking article comprising, in this order:
- (a) incorporating an additive in 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 coating is capable of being fractured during smoking,
- the process further comprising at least partially coating the impregnated filter plug with a cross-linking agent, prior to coating with the cross-linkable polymer material.
Dependencies are inferred from the claim text.