Filter segment, aerosol-generating article, and system comprising same

Abstract

A filter segment may include an outer portion including a filter, and an inner portion disposed inside the outer portion and including an airflow barrier surrounded by the filter and configured to retard or block airflow.

1 . A filter segment for an aerosol generating article, the filter segment comprising:
 an outer portion comprising a filter; and   an inner portion disposed inside the outer portion and comprising an airflow barrier surrounded by the filter and configured to retard or block airflow.   
     
     
         2 . The filter segment of  claim 1 , wherein
 the airflow barrier is disposed in a central portion of the filter segment.   
     
     
         3 . The filter segment of  claim 1 , wherein
 the airflow barrier extends in a longitudinal direction of the filter segment.   
     
     
         4 . The filter segment of  claim 1 , wherein
 the airflow barrier comprises a solid material.   
     
     
         5 . The filter segment of  claim 4 , wherein
 the solid material comprises at least one of paper thread, silicone thread, paper filter, or acetate tow, or a combination thereof.   
     
     
         6 . The filter segment of  claim 1 , wherein
 a diameter of the airflow barrier is substantially equal to or less than half a diameter of the filter segment.   
     
     
         7 . An aerosol generating article comprising:
 a first segment comprising a medium; and   a second segment disposed downstream of the first segment,   wherein the second segment comprises a filter segment,   wherein the filter segment comprises:   an outer portion comprising a filter; and   an inner portion disposed inside the outer portion and comprising an airflow barrier surrounded by the filter and configured to retard or block airflow.   
     
     
         8 . An aerosol generating system comprising:
 an aerosol generating article comprising a first segment comprising a medium and a second segment disposed downstream of the first segment, wherein the second segment comprises a filter segment, wherein the filter segment comprises an outer portion comprising a filter and an inner portion disposed inside the outer portion and comprising an airflow barrier surrounded by the filter and configured to retard or block airflow; and   an aerosol generating device comprising a first housing, a second housing disposed within the first housing and configured to accommodate the aerosol generating article, and a heater disposed around the second housing and configured to heat the first segment.