Low ignition propensity cigarette paper and cigarette including the same

Abstract

A low ignition propensity cigarette paper includes a first coating layer disposed in a combustion section combusted by smoking, and a second coating layer disposed in a cigarette butt section where smoking is finished, wherein a basis weight of the first coating layer is smaller than a basis weight of the second coating layer.

1 . A low ignition propensity cigarette paper comprising:
 a first coating layer disposed in a combustion section combusted by smoking, and   a second coating layer disposed in a cigarette butt section where smoking is finished,   wherein a basis weight of the first coating layer is smaller than a basis weight of the second coating layer, and   wherein the combustion section corresponds to a distance a 1  which the first coating layer is far from a first end portion of the low ignition propensity cigarette paper by about 5 mm to about 45 mm, and the cigarette butt section corresponds to a distance a 4  which the second coating layer is far from a second end portion of the low ignition propensity cigarette paper by about 7 mm to about 31 mm.   
     
     
         2 . The low ignition propensity cigarette paper of  claim 1 , wherein:
 the basis weight of the first coating layer is about 0.5 g/m 2  to about 2.5 g/m 2 , and the basis weight of the second coating layer is about 2.6 g/m 2  to about 5.5 g/m 2 .   
     
     
         3 . The low ignition propensity cigarette paper of  claim 1 , wherein:
 a diffusion coefficient of the first coating layer is greater than a diffusion coefficient of the second coating layer.   
     
     
         4 . The low ignition propensity cigarette paper of  claim 3 , wherein:
 the diffusion coefficient of the first coating layer is about 1.001 cm/sec to about 2.500 cm/sec, and the diffusion coefficient of the second coating layer is about 0.070 cm/sec to about 1.000 cm/sec.   
     
     
         5 . (canceled) 
     
     
         6 . The low ignition propensity cigarette paper of  claim 1 , wherein:
 a distance a 3  between the first coating layer and the second coating layer is about 10 mm to about 52 mm.   
     
     
         7 . A cigarette comprising:
 a cigarette column portion, and   a low ignition propensity cigarette paper surrounding the cigarette column portion, wherein the low ignition propensity cigarette paper includes a first coating layer disposed in a combustion section combusted by smoking and a second coating layer disposed in a cigarette butt section where smoking is finished,   wherein a basis weight of the first coating layer is smaller than a basis weight of the second coating layer, and   wherein the combustion section corresponds to a distance a 1  which the first coating layer is far from a first end portion of the low ignition propensity cigarette paper by about 5 mm to about 45 mm, and the cigarette butt section corresponds to a distance a 4  which the second coating layer is far from a second end portion of the low ignition propensity cigarette paper by about 7 mm to about 31 mm.   
     
     
         8 . A cigarette of  claim 7 , wherein:
 the basis weight of the first coating layer is about 0.5 g/m 2  to about 2.5 g/m 2 , and the basis weight of the second coating layer is about 2.6 g/m 2  to about 5.5 g/m 2 .   
     
     
         9 . A cigarette of  claim 7 , wherein:
 a diffusion coefficient of the first coating layer is greater than a diffusion coefficient of the second coating layer.   
     
     
         10 . A cigarette of  claim 9 , wherein:
 the diffusion coefficient of the first coating layer is about 1.001 cm/sec to about 2.500 cm/sec, and the diffusion coefficient of the second coating layer is about 0.070 cm/sec to about 1.000 cm/sec.   
     
     
         11 . (canceled) 
     
     
         12 . A cigarette of  claim 7 , wherein:
 a distance a 3  between the first coating layer and the second coating layer is about 10 mm to about 52 mm.   
     
     
         13 . A cigarette of  claim 7 , further comprising:
 a cigarette filter portion.   
     
     
         14 . A cigarette of  claim 13 , wherein:
 the cigarette filter portion includes at least one filter member.   
     
     
         15 . A cigarette of  claim 14 , wherein:
 the cigarette filter portion includes at least one of an adsorbent or a flavoring agent.   
     
     
         16 .- 20 . (canceled)