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    • 1. 发明授权
    • Cigarette filters
    • 香烟过滤器
    • US08201564B2
    • 2012-06-19
    • US11607949
    • 2006-12-04
    • Mark A. McHughGeorgios KarlesDiane GeeJoseph L. BanyaszZhihao ShenMunmaya K. Mishra
    • Mark A. McHughGeorgios KarlesDiane GeeJoseph L. BanyaszZhihao ShenMunmaya K. Mishra
    • A24D3/06
    • A24D3/0212D06M13/00D06M23/105D06M2101/08
    • Fibrous material suitable for incorporation into filter elements of smoking articles such as cigarettes are impregnated with additives and agents such as flavorants, flavorant-enhancers and/or free radical scavengers. The fibrous material is contacted with the additive dispersed in a high pressure gas or supercritical fluid (SCF) held at elevated pressures. The high pressure gas or SCF swells the fibrous matrix and enables the additive to be incorporated within the matrix. When pressure is reduced, the gas or SCF vaporizes and leaves the additive embedded in the fiber interstices. As a result, the additive is slowly released over a finite period of time. When incorporated into a cigarette filter, the additive is released at a desired rate from the interior of the fibrous filter into the cigarette smoke.
    • 适于掺入烟草制品如香烟的过滤元件的纤维材料用添加剂和试剂(例如调味剂,调味剂增强剂和/或自由基清除剂)浸渍。 纤维材料与分散在保持在高压下的高压气体或超临界流体(SCF)中的添加剂接触。 高压气体或SCF使纤维基体膨胀,并使添加剂能够并入基体内。 当压力降低时,气体或SCF蒸发并留下嵌入在纤维间隙中的添加剂。 结果,添加剂在有限的时间内缓慢释放。 当并入香烟过滤嘴中时,添加剂以纤维过滤器内部以香烟烟雾的期望速率释放。