Microperforated filter tip cigarette

Details Microperforated filter tip cigarette Microperforated filter tip cigarette

A - Human Necessities

24

D

131/17

A24D 1/04 (2006.01) A24D 1/02 (2006.01) A24D 3/04 (2006.01)

Patent

CA 1074657

ABSTRACT An improved ventilated filter tip cigarette is provided utilizing a unique combination of porous filter plug wrap having a porosity of from about 300 to 4000 Filtrona air permeability units with a microperforated tipping envelope having perforations averaging less than about 0.01 mm2 each in open area. The relationship of plug wrap porosity combined with the size of microperforations in the tipping envelope provide cigarettes with maximum selective reductions in carbon monoxide yields and only minor reductions in nicotine yields as com- pared to constituent yields heretofore obtained in the smoke from ventilated cigarettes.

300964

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