Aerosol generating substrate and aerosol generating article

Abstract

An aerosol generating substrate includes: at least one airway channel internally formed, the at least one airway channel penetrating through at least one end of the aerosol generating substrate along a length direction. In a cross section perpendicular to the length direction of the aerosol generating substrate, a cross-sectional shape of the at least one airway channel is substantially a regular polygon.

What is claimed is: 
     
         1 . An aerosol generating substrate, comprising:
 at least one airway channel internally formed, the at least one airway channel penetrating through at least one end of the aerosol generating substrate along a length direction,   wherein, in a cross section perpendicular to the length direction of the aerosol generating substrate, a cross-sectional shape of the at least one airway channel is substantially a regular polygon.   
     
     
         2 . The aerosol generating substrate of  claim 1 , wherein the at least one airway channel comprises a plurality of airway channels,
 wherein the plurality of airway channels penetrate through two opposite ends of the aerosol generating substrate along the length direction, and   wherein the plurality airway channels have a same shape and dimension.   
     
     
         3 . The aerosol generating substrate of  claim 1 , wherein an airway groove is formed along a circumferential surface of the aerosol generating substrate, and
 wherein the airway groove penetrates through two opposite ends of the aerosol generating substrate along the length direction.   
     
     
         4 . The aerosol generating substrate of  claim 3 , wherein, in the plane perpendicular to the length direction of the aerosol generating substrate, a cross-sectional shape of the airway groove is identical to a local shape of the regular polygon. 
     
     
         5 . The aerosol generating substrate of  claim 1 , wherein the at least one airway channel comprises a plurality of airway channels,
 wherein the plurality of airway channels are distributed on a plurality of trajectory lines,   wherein airway channels of the plurality of airway channels on a single trajectory line of the plurality of trajectory lines are linearly arranged along a first direction,   wherein the plurality of trajectory lines are arranged along a second direction, and   wherein the first direction is not parallel to the second direction.   
     
     
         6 . The aerosol generating substrate of  claim 5 , wherein airway channels on the single trajectory line are equidistantly arranged. 
     
     
         7 . The aerosol generating substrate of  claim 5 , wherein airway channels on the single trajectory line are arranged along a circumferential direction around a center of the aerosol generating substrate, and
 wherein the plurality of trajectory lines are arranged in concentric circles along a radial direction.   
     
     
         8 . The aerosol generating substrate of  claim 5 , wherein the airway channels on the single trajectory line are linearly arranged along a first direction,
 wherein the plurality of trajectory lines are arranged in parallel along a second direction, and   wherein the first direction is perpendicular to the second direction.   
     
     
         9 . The aerosol generating substrate of  claim 8 , wherein a distance between two adjacent airway channels of the plurality of airway channels on the single trajectory line is equal to a distance between two adjacent trajectory lines of the plurality of trajectory lines. 
     
     
         10 . The aerosol generating substrate of  claim 8 , wherein the plurality of airway channels are distributed in a matrix, or a distribution pattern of the airway channels is a matrix distribution with omitted apex points. 
     
     
         11 . The aerosol generating substrate of  claim 7 , wherein the regular polygon comprises a square or a regular hexagon. 
     
     
         12 . The aerosol generating substrate of  claim 8 , wherein the regular polygon is substantially a regular hexagon,
 wherein airway channels on two adjacent trajectory lines on the plurality of trajectory lines are staggered, and   wherein the airway channels are arranged in a honeycomb pattern.   
     
     
         13 . The aerosol generating substrate of  claim 1 , wherein the at least one airway channel comprises a plurality of airway channels, and
 wherein a number of the plurality of airway channels does not exceed 730.   
     
     
         14 . The aerosol generating substrate of  claim 1 , wherein the at least one airway channel comprises a plurality of airway channels, and
 wherein a hydraulic diameter of the plurality of airway channels ranges from 0.1 mm to 3 mm.   
     
     
         15 . The aerosol generating substrate of  claim 1 , wherein the aerosol generating substrate comprises a particle aggregate,
 wherein a plurality of micropores is formed between particles of the particle aggregate,   wherein the plurality of micropores communicates with one other and forms micro airways that communicate with the at least one airway channel, and   wherein a hydraulic diameter of the micropores ranges from 10 nm to 30 μm.   
     
     
         16 . The aerosol generating substrate of  claim 1 , wherein, in the plane perpendicular to the length direction of the aerosol generating substrate, a maximum dimension of a contour of the aerosol generating substrate ranges from 4 mm to 10 mm. 
     
     
         17 . The aerosol generating substrate of  claim 1 , wherein a number of sides of the regular polygon does not exceed 10. 
     
     
         18 . An aerosol generating article, comprising:
 the aerosol generating substrate of  claim 1 ;   a functional segment arranged at one end of the aerosol generating substrate along the length direction, the functional segment comprises a filter segment configured to filter aerosol; and   an outer wrapping layer wrapping a circumferential outer portion of the functional segment and the aerosol generating substrate.