Aerosol Generating Substrate and Aerosol Generating Article

This application is a continuation of International Patent Application No. PCT/CN2023/099998, filed on Jun. 13, 2023, which claims priority to Chinese Patent Application No. 202310084346.3, filed on Jan. 20, 2023. The entire disclosure of both applications is hereby incorporated by reference herein.

The present application relates to the technical field of a smoke generating article, and particularly relates to an aerosol generating substrate and an aerosol generating article.

A smoke generating article includes a smoke generating article for generating aerosol in a burning manner and a smoke generating article for generating aerosol in a heat-not-burn manner. A typical heat-not-burn article includes an aerosol generating substrate capable of being heated to volatilize to generate aerosol, such as a tobacco raw material, a fragrant raw material or/and an aerosol former, the aerosol generating substrate is heated by an external heat source to a degree of just being roasted, but the aerosol generating substrate may not burn. Through the loading of a great dose of the aerosol former, the aerosol former is released through high-temperature heating to form smoke in use.

In the related art, when the smoke generating article is heated, the resistance to draw (RTD) during heating is great, and the puff-by-puff differences of the aerosol volume is great.

In an embodiment, the present invention provides an aerosol generating substrate, comprising: a plurality of airway holes internally formed, wherein each airway hole of the plurality of airway holes penetrates through at least one end of the aerosol generating substrate in a length direction, and wherein the plurality of airway holes are formed in the aerosol generating substrate in a uniformly distributed manner.

In an embodiment, the present invention provides an aerosol generating substrate and an aerosol generating article capable of reducing the resistance to draw during heating and improving the puff-by-puff drawing uniformity.

In an embodiment, the present invention provides an aerosol generating substrate, the aerosol generating substrate is internally formed with a plurality of airway holes, each of the airway holes penetrates through at least one end of the aerosol generating substrate in a length direction, and the airway holes are formed in the aerosol generating substrate in a uniformly distributed manner.

In an embodiment, each of the airway holes penetrates through two opposite ends of the aerosol generating substrate in the length direction; and in a plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the aerosol generating substrate is a circular shape.

In an embodiment, in a plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the aerosol generating substrate is an elliptical shape, a racetrack shape or a polygonal shape.

In an embodiment, in a plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the airway holes is a circular shape, an elliptical shape, a racetrack shape, a fan shape or a polygonal shape.

In an embodiment, all of the airway holes are distributed on a plurality of track lines, each of the airway holes on a single track line is in linear arrangement in a first direction, the plurality of track lines are distributed in a second direction, and the first direction is not parallel to the second direction.

In an embodiment, each of the airway holes on the single track line is equidistant and is in repeated arrangement.

In an embodiment, each of the airway holes on the single track line is distributed in a circumference direction around the center of the aerosol generating substrate, and the plurality of track lines are arranged in a concentric circle manner in the radial direction of the aerosol generating substrate.

In an embodiment, each of the airway holes on the single track line is in linear arrangement in the first direction, the plurality of track lines are parallel distributed in the second direction, and the first direction is perpendicular to the second direction.

In an embodiment, the airway holes are in array distribution, the quantity of the airway holes in the first direction is the same as the quantity of the airway holes in the second direction, each of the airway holes on the single track line is equidistant, and the distance between every two track lines is identical.

In an embodiment, the quantity of the airway holes on the single track line is 2 to 20, and the quantity of the plurality of track lines is 2 to 20.

In an embodiment, airway slots are formed in the outer side wall of the aerosol generating substrate, and the airway slots penetrate through at least one end of the aerosol generating substrate in the length direction.

In an embodiment, in the plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the airway slots is the same as the local shape of the airway holes.

In an embodiment, in the plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the airway slots is an arc shape, a rectangular shape or a trapezoidal shape.

In an embodiment, the cross section area of the airway holes is 0.0019 mmto 30 mm; or the hydraulic diameter of the airway holes is 0.05 mm to 6 mm.

In an embodiment, the wall thickness of a partition wall between the adjacent airway holes is 10 μm to 800 μm.

In an embodiment, the center line of at least one of the airway holes in the plurality of the airway holes in the extending direction is coincident with the central axis of the aerosol generating substrate in the length direction.

Embodiments of the present application further provide an aerosol generating article, including:

In an implementation, the functional segment further includes a cooling segment, and the cooling segment is positioned between the filtering segment and the aerosol generating substrate.

Embodiments of the present application provide an aerosol generating substrate and an aerosol generating article. The aerosol generating substrate is internally formed with a plurality of airway holes, each of the airway holes penetrates through at least one end of the aerosol generating substrate in a length direction, and the airway holes are formed in the aerosol generating substrate in a uniformly distributed manner. When the aerosol generating substrate is heated, the aerosol generating substrate is heated to release aerosol, the aerosol flows out through micropores or gaps of the partition walls among the airway holes, is gathered into the airway holes, and is conveyed to an inhaling end under the effect of the inhaling negative pressure, that is, through the formation of the plurality of airway holes, the surface area (the side walls of the airway holes equal to a part of surface of the aerosol generating substrate) of the aerosol generating substrate is increased, so that the heat of the aerosol generating substrate may enter the inside of the aerosol generating substrate from the outer surface of the aerosol generating substrate. Compared to a structure adopting direct conduction in the aerosol generating substrate in the related art, the present application may improve the heating efficiency. Additionally, the airway holes are formed in the aerosol generating substrate in a uniformly distributed manner, so the mass of the aerosol generating substrate in the unit volume may be relatively uniform, thus the aerosol release uniformity of the aerosol generating substrate in the heating process may be improved, the aerosol conveying uniformity and heated uniformity are facilitated, and then the feeling of a user may be improved. That is, through the aerosol generating substrate in the embodiments of the present application, the use experience feeling of a user may be improved.

It should be noted that in a case of no conflict, embodiments in the present application and the technical features in the embodiments may be combined with each other. Detailed descriptions in specific implementations should be understood as explanations and descriptions on the objectives of the present application, and should not be construed as improper limitations to the present application.

An embodiment of the present application provides an aerosol generating article. Referring toto, the aerosol generating articleincludes a functional segment, an outer wrapping layerand an aerosol generating substrate. The functional segmentis arranged at one end of the aerosol generating substratein a length direction, and the functional segmentat least includes a filtering segment configured to filter aerosol. The filtering segment may also be called as a filter tip.

The outer wrapping layerwraps around the outer peripheral sides of the functional segmentand the aerosol generating substrate.

The aerosol generating articleis configured to be matched with an aerosol generating device with a heating component to use. Specifically, the heating component heats the aerosol generating substrateto generate aerosol, and a user inhales the aerosol filtered by the filtering segment of the functional segment.

It should be noted that the aerosol generating articlegenerates the aerosol through the aerosol generating substrate, and the functional segmentdoes not generate the aerosol.

It should be noted that the aerosol generating article in the embodiment of the present application may be applicable to a combustion manner, and may also be applicable to a heat-not-burn manner. In the embodiment of the present application, the description is provided by taking that the aerosol generating articleis applicable to a heat-not-burn manner as an example.

The heating component has many heating manners. Exemplarily, the heating manners include a center heating manner, a peripheral heating manner, a bottom air heating manner, etc. The center heating manner refers to a manner of inserting the heating component to the inside of the aerosol generating articleto bake and heat the aerosol generating articlefrom inside to outside. The peripheral heating manner refers to a manner of setting the heating component on the periphery of the aerosol generating articleto bake and heat the aerosol generating articlefrom the outside to the inside. The bottom heating manner refers to a manner of firstly heating the air by the heating component and then baking and heating the aerosol generating articleby hot air from bottom to top. These heating manners may be applied by specifically resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating technologies, etc., and are not specifically limited herein.

The functional segmentmay only be provided with a filtering segmentas shown in, and may further be provided with a filtering segmentand a cooling segmentas shown in. For the functional segmentprovided with the cooling segment, the cooling segmentis arranged between the filtering segmentand an aerosol generating substrate structureto cool the aerosol before the aerosol is filtered by the filtering segment.

The cooling segment is configured to cool the aerosol before the aerosol is filtered by the filtering segment, so as to lower the temperature of the aerosol and avoid a “mouth burn” phenomenon when a user inhales the aerosol.

In some embodiments, the functional segmentmay further be provided with a supporting segment, and the supporting segment has a certain structural strength, and achieves an axial limitation effect on the aerosol generating substrate. Specifically, when the aerosol generating articleis inserted into a heating chamber in the aerosol generating device, or when the heating component is inserted into the aerosol generating substrate, the supporting segment provides a counter-acting force for the aerosol generating substrateto prevent the axial play of the aerosol generating substrate.

Another embodiment of the present application further provides an aerosol generating substrate, and the aerosol generating substrateis configured for the aerosol generating articlein the embodiment of the present application. Referring toto, the aerosol generating substrateis internally formed with a plurality of airway holes, and each of the airway holespenetrates through at least one end of the aerosol generating substratein the length direction. That is, the airway holesextend along the longitudinal direction of the aerosol generating substrate, and the airway holesare formed in the aerosol generating substratein a uniformly distributed manner.

It should be noted that the “uniformly distributed” manner of the airway holesincludes the array or concentric circle distribution of the airway holes. That is, the self arrangement manner of the airway holesis uniform. It could be understood that the airway holesmay be non-uniform in the cross section of the aerosol generating substrate. That is, the airway holesare in uniform distribution, but the airway holesdo not uniformly divide the whole aerosol generating substrate. For example, the cross section of the aerosol generating substrateis in a circular shape, and the airway holesin array distribution are not uniformly distributed in the cross section of the circular shape. The walls of the substrate of the airway holesform the surface of the aerosol generating substrate, the surface area of the aerosol generating substrateis increased by the airway holes, the heat transfer is convenient, and the heating efficiency is improved. In addition, the aerosol flows out through the micropores, is gathered into the airway holes, and is conveyed to the inhaling end under the effect of the inhaling negative pressure, the resistance to draw of the user during heating may be reduced, and the experience feeling of the user is improved.

A specific structure of the aerosol generating substrateis not limited here. Exemplarily, in an embodiment, the aerosol generating substratemay be made of an atomizing substrate per se, and for example, may be made of an aerosol generating fragrant substrate. In some other embodiments, the aerosol generating substratemay further include a substrate and an atomizing substrate arranged on the substrate, and the substrate, for example, may be high-temperature-resistant carbon fiber. Therefore, through the arrangement of the substrate, the strength of the aerosol generating substratemay be improved, and the high temperature to a certain degree may be borne without generating peculiar smell.

The aerosol generating substrate, for example, is a recombinant tobacco substrate containing components such as an aerosol former and tobacco, is manufactured through an extrusion process, and is of an integral structure. Therefore, the aerosol generating substrateis still an integral substrate after it is heated to be inhaled or the heating is stopped, the disintegration falling problem will not occur, and the problems of filament falling and cleaning difficulty of a filament or granular aerosol generating substratein the related art are solved.

The aerosol generating substratemay be formed through processes of pressing, extrusion, etc.

It should be noted that the condition that the airway holesare uniformly distributed in the aerosol generating substrateat least includes: the hole diameter of each of the airway holesis substantially identical, and the wall thickness of the partition wall of the adjacent airway holesis substantially identical.

Through the formation of the airway holesinside the aerosol generating substrate, the surface area of the aerosol generating substrateis increased, and the effects of improving the heating efficiency and improving the feeling of the user are achieved.

A plurality of airway holesare formed inside the aerosol generating substrate in the embodiment of the present application, each of the airway holespenetrates through the two opposite ends of the aerosol generating substratein the length direction, and the airway holesare uniformly distributed in the aerosol generating substrate. When the aerosol generating substrateis heated, the aerosol generating substrateis heated to release aerosol, the aerosol flows out through micropores or gaps of the partition walls among the airway holes, is gathered into the airway holes, and is conveyed to the inhaling end under the effect of the inhaling negative pressure. That is, through the formation of the plurality of airway holes, the surface area (the side walls of the airway holesequal to a part of surface of the aerosol generating substrate) of the aerosol generating substrateis increased, so that the heat of the aerosol generating substratemay enter the inside of the aerosol generating substratefrom the outer surface of the aerosol generating substrate. Compared to a structure adopting direct conduction in the aerosol generating substratein the related art, the present application may improve the heating efficiency. In addition, the airway holesare uniformly distributed in the aerosol generating substrate, the mass of the aerosol generating substratein the unit volume is relatively uniform, therefore, the aerosol release uniformity of the aerosol generating substratein the heating process may be improved, the aerosol conveying uniformity and heated uniformity are facilitated, and then the feeling of the user may be improved. That is, the aerosol generating substratein the embodiment of the present application may improve the use experience felling of the user.

The outer wrapping layerwraps around the peripheral exterior of the functional segmentand the aerosol generating substrate.

The material of the outer wrapping layeris not limited, and for example, includes but is not limited to one or a combination of several materials of fiber paper, a metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, PE and PBAT, etc.

In some embodiments, referring to, the functional segmentonly includes a filtering segment. In some other embodiments, referring to, besides the filtering segment, the functional segment includes a supporting segment (not shown in the figures) and/or a cooling segment, and the supporting segment and/or the cooling segmentare/is arranged between the aerosol generating substrateand the filtering segment.

The cooling segmentis configured to cool the aerosol before the aerosol is filtered by the filtering segment, so as to lower the temperature of the aerosol and avoid a “mouth burn” phenomenon when the user inhales the aerosol.

The material of the cooling segmentincludes but is not limited to one or a combination of several materials of PE (polyethelme), PLA (Polylactic acid, also called as polylactide), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), cellulose acetate fiber, and propylene fiber.

The material of the filtering segment includes but is not limited to one or a combination of several materials of PE (polyethelme), PLA (Polylactic acid, also called as polylactide), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), cellulose acetate fiber, and propylene fiber.

The materials of the cooling segmentand the filtering segment may be the same or may be different.