POROUS CARBON MATERIALS AND SMOKING ARTICLES AND SMOKE FILTERS THEREFOR INCORPORATING SUCH MATERIALS

摘要

POROUS CARBON MATERI2LS AND SMOKING ARTICLES AND SMOKE FILTERS THEREFOR INCORPORATIN SUCH U12TERIALS A POROUS CARBON MATERIAL SUITABLE FOR INCORPORATION IN SMOKE FILTERS FOR CIGARETTES HAS A BET 5 SURFACE AREA OF AT LEAST 800 M 2IG AND A PORE STRUCTURE THAT INCLUDES MESOPORES AND MICROPORES. 'ME PORE VOLUME (AS MEASURED BY NITROGEN ADSORPTION) IS AT LEAST 0.9 CM/G AND FROM 15 TO 65OF THE PORE VOLUME IS IN MESOPORES. THE PORE STRUCTURE OF THE MATERIAL PROVIDES A BULK DENSITY GENERALLY LESS THAN 0.5 G/CC. THE MATERIAL MAY BE PRODUCED BY CARBONISING AND ACTIVATING ORGANIC RESINS AND MAY BE IN THE FORM OF BEADS FOR EASE OF .10 HANDLING. 1 3 ,O@