470 



4,836,224 



19 20 



linic acid additive. The fourth lot is no^ treated with the and average smoke pH when compared lo a control 



levuUnic acid additive and is employed for comparison (i.e.. Sample No. C-5 which does not have the levulinic 



purposes. acid additive). 



The levulinic acid additive is applied to cut filler as a Organolepic evaluation of the samples indicates thai 



spray using a hand sprayer as a mixture of water and S the cigarettes of the invention are smooth smoking 



additive. The quantity of water of the water/additive while the control sample is very harsh. The mildness of 



mixture is adjusted to attain a Tuial cut filler moisture Sample Nos. 12 and 13 is considered comparable. The 



content of about 15 percent cigarettes of the invention yield good tobacco taste, 



Each of the four lots are separately placed in sealed strength and smoking satisfaction. The control sample is 

 plastic bags and stored at 70* F. for 2 days. Then, the 10 very strong, and the overpowering sensation provided 

 four lots are each mixed with about 880 g on a dry thereby is not satisfying, 

 weight basis, of a cut (ilier mixture of about 35 parts pyampi p < 

 volume expanded Burley tobacco having a nicotine fcAAMKLb 5 

 content of about 4 percent, and about 65 parts volume Cigarettes incorporating varying amounts of the lev- 

 expanded flue-cured tobacco having a nicotine content IS ulinic acid are provided using the following procedure, 

 of about 4 percent The volume expanded cut filler Cigarettes having lengths of about 84 mm and cir- 

 mixture is added to each lot using a mixture drum in cumferences of about 24.85 mm have tobacco rod 

 order to provide a well mixed blend having a moisture lengths of .57 mm and filter element lengths of 27 mm. 

 content of between about 12 percent and about 13 per- The tobacco rod includes a charge of tobacco cut niler 

 cent. 20 weighing about 0.82 g contained in a circumscribing 



The resulting blend provided from the first lot of cigarette paper wrap which is sold commercially as 856 



filler material has about 1 percent of the levulinic acid Cigarette Paper by Ecusta Corp. The iilter element is 



applied thereto (based on the filler dry weight) and is manufactured using conventional cigarette filter mak- 



designated as Sample No. 11. The resulting blend pro- ing technology from cellulose acetate tow (2.7 denier 



vided from the second lot of filler material has about 3 23 per filament, 48,000 total denier) and circumscribing sir 



percent of the levulinic acid applied thereto (based on permeable paper plug wrap having a CORESTA poros- 



the filler dry weight) and is designated as Sample No. ity of about 26,0(X) cm/min. The tobacco rod and filter 



12. The resulting blend provided from the third lot of element are aligned in an abutting, end-to-end relatio- 



filler material has about 5 percent of the levulinic acid ship and secured together using essentially air imperme- 



applied thereto (based on the filler dry weight) and is }0 able lipping paper. The lipping paper is adhesively se- 



designated as Sample No. 13. The resulting blend pro- cured to the filter element and the adjacent portion of 



vided from the fourth lot of filler material is not treated the tobacco rod. The tipping material circumscribes the 



with the levulinic acid additive, is employed for com- length of the filter element and about 4 mm of the length 



parison purposes, and is designated as Sample No. C-5. of the tobacco rod. Cigarettes so described are manu- 



The various cigarettes are smoked under FTC condi- 35 factured using a Pilot Cigarette Maker from Hauni- 



tions. Data concerning (i) the nicotine content of each Werke Korber &. Co. KG. The cigarettes so manufac- 



blend, (ii) FTC "tar," FTC nicotine and FTC carbon lured are designated Sample Nos. 14, 15, 16 and C-6, 



monoxide, (iii) the "tar"/nicotine ratio, (iv) puff count corresponding to the sample of filler material from 



and (v) pH of the mainstream aerosol for each sample, which each cigarette is manufactured, 



are presented in Table IV. 40 The filler materials employed in providing the to- 



*Nol u cumptc of ttte Inveollo*. 



'"'Sec Table I. foMnMa 1-4. mpeeltvcly. 



*Smoke pH H detennlncd mini the lechnlqacf d uc ri Ud In the ScBSabaa()i CI «l rerrrcnc*. lapn. The pmcnled mmimum wni nwiiifmim pH value for each eigareKe are 



the calcvlaied avenge of pct-pelT ninimaa ajid oieaiflMm valeca obulned (or T pvITi pet cigafene. 



*Avengc Boioka pH Ii the "twenty pan** nsoke pH tor the nnlaalrcan amoke of 30 clgamiea at detennined uamg techniqwea deacnbed by Hairia el at. lupra 



The data in Table FV indicate that the various ciga- bacco rods for Sample Nos. 14, 15, 16 and C-6 are the 



rettes of this inention having high nicotine content cut ,, filler materials described for Sample Nos. 11, 12, 13 and 



filler O'C-i more than 2.5 percent total blend nicotine) C-5, respectively. 



exhibit FTC "tar," nicotine and carbon monoxide deliv- The various cigarettes are smoked under FTC condi- 

 eries comparable to the control cigarette. The various lions. Data concerning CO the nicotine content of each 

 cigarettes, also exhibit comparable FTC "tar" to nico- blend, (ii) FTC "tar" and FTC nicotine, (iii) the "tar"- 

 tine ratios and puff counts. However, cigarettes of the „ /nicotine ratio, (iv) puff count, and (v) pH of the main- 

 invention (i.e.. Sample Nos. 11-13 which contain levu- stream aerosol for each sample, are presented in Table 

 linic cid additive) exhibit reduced mainstream by puff V. 



TABLE V 



FTC**T»r"l FTCNicotinel *Tir"/' Toul^ Pufl* Average' 



Sample (mg/cignrctte) (mg/cigafette) Nicoiinc NIcolinc (%) Count Smoke pH 



