WO2024227878A1

WO2024227878A1 - Aerosol generating article for an aerosol generating device and associated manufacturing method

Info

Publication number: WO2024227878A1
Application number: PCT/EP2024/062124
Authority: WO
Inventors: Alec WRIGHT; Sandra SPIELES; Pranav KULKARNI
Original assignee: JT International SA
Current assignee: JT International SA
Priority date: 2023-05-03
Filing date: 2024-05-02
Publication date: 2024-11-07
Anticipated expiration: 2025-11-03

Abstract

Aerosol generating article for an aerosol generating device and associated manufacturing method The present invention concerns an aerosol generating article (12) for delivering aerosol when heated in an aerosol generating device; the aerosol generating article (12) extending between an inlet end (18) and an outlet end (19) and having a flat cuboid shape; wherein the aerosol generating article (12) comprises: • - a cooling part (26); • - a substrate part (25) positioned sequentially with the cooling part (26) and comprising an aerosol generating substrate; • - a wrapper (31) arranged for wrapping the substrate part (25) and the cooling part (26); wherein the cooling part (26) is entirely hollow and forms the outlet end (19) of the aerosol generating article (12); wherein the wrapper (31) comprises paper having a basis weight comprised between 75 g/m² and 120 g/m² and a thickness comprised between 95 μm and 160 μm.

Description

Aerosol generating article for an aerosol generating device and associated manufacturing method

FIELD OF THE INVENTION

The present invention concerns an aerosol generating article designed to operate with an aerosol generating device. The present invention also concerns a manufacturing method of such an aerosol generating article.

Particularly, the aerosol generating article comprises an aerosol generating substrate able to form aerosol when being heated by the aerosol generating device. Thus, such type of aerosol generating devices, also known as heat-not-burn devices, is adapted to heat, rather than burn to generate aerosol for inhalation.

BACKGROUND OF THE INVENTION

The popularity and use of reduced-risk or modified-risk devices (also known as vaporisers) has grown rapidly in the past few years as an aid to assist habitual smokers wishing to quit smoking traditional tobacco products such as cigarettes, cigars, cigarillos, and rolling tobacco. Various devices and systems are available that heat or warm vaporizable substances as opposed to burning tobacco in conventional tobacco products.

A commonly available reduced-risk or modified-risk device is the heated substrate aerosol generation device or heat-not-burn device. Devices of this type generate aerosol or vapour by heating an aerosol generating substrate that is usually comprised in a separate consumable article. Typically, such aerosol generating substrate comprises moist leaf tobacco or other suitable vaporizable material to a temperature typically in the range 150°C to 350°C. Heating an aerosol generating substrate, but not combusting or burning it, releases aerosol that comprises the components sought by the user but not by-products of combustion and burning. Furthermore, the aerosol produced by heating the tobacco or other vaporizable materials does not typically comprise the burnt or bitter taste resulting from combustion and burning that can be unpleasant for the user and the smoke that can be irritating and polluting for the surroundings.

Aerosol generating articles, usable with such type of aerosol generating devices can take various forms. Some of them can present an elongated stick or any other suitable shape, like for example a flat shape. Generally, such an aerosol generating article is received at least partially in a heating chamber of the device which comprises one or several heaters to heat the article.

An aerosol generating article comprises generally a wrapper wrapping together the aerosol generating substrate and a downstream part, also called cooling part, for cooling the aerosol. The downstream part can comprise a filter and/or a cooling element to cool the aerosol before it is delivered to the user. Such a filter or cooling element also acts as a support structure ensuring thus the shape of the downstream part during the using of the article. For example, if this shape deforms at least slightly creating an air gap between the article and the mouthpiece then air could be drawn along this path instead of through the article. This results in a low quantity of vapour and hot puff that is undesirable for the user.

The filter or cooling element constitutes thus an additional component of the article and its inserting inside the downstream part requires an additional step during the manufacturing. Consequently, due to this additional component, the aerosol generating article can present a complex structure and its manufacturing can be complicated and costly.

SUMMARY OF THE INVENTION

One of the aims of the invention is to propose an aerosol generating article that can be easily and inexpensively manufactured, while minimizing aerosol leakage.

For this purpose, the invention relates to an aerosol generating article for delivering aerosol when heated in an aerosol generating device; the aerosol generating article extending along an article axis (X) between an inlet end and an outlet end and having a flat cuboid shape extending along the article axis (X); wherein the aerosol generating article comprises:

- a cooling part;

- a substrate part positioned sequentially with the cooling part along an article axis (X) and comprising an aerosol generating substrate;

- a wrapper arranged for wrapping the substrate part and the cooling part; wherein the cooling part is entirely hollow and forms the outlet end of the aerosol generating article; wherein the wrapper comprises paper having a basis weight greater than 75 g/m2 and/or a thickness greater than 95 pm.

Provided with these features, the aerosol generating article can be free of any support in the cooling part. Particularly, the inventors have discovered that the wrapper presenting the above-mentioned characteristics is sufficiently rigid to form a hollow cooling section of the cooling part that can support external pressure while for example inserting the cooling part in a mouthpiece or using the cooling part without mouthpiece. Thus, the shape of the cooling part can be kept substantially the same during the operations of the aerosol generating article (insertion into the device, vaping session, extraction from the device, etc.). For example, when the aerosol generating article is used with an external mouthpiece, the article can precisely fit with the mouthpiece (e.g., with no gap formed between an internal surface of the mouthpiece and the external surface of the cooling part). Thus, aerosol leakage can be avoided or at least minimized.

Additionally, since the cooling part is entirely hollow, cooling of the aerosol is essentially obtained by convection. Therefore, the entirely hollow cooling part presents efficient cooling properties. Furthermore, the condensation can be maintained low as the surface of contact of the cooling part with the aerosol is minimized.

By “entirely hollow cooling part”, it is understood that an airflow can freely pass through the cooling part without being disturbed. Particularly, it means that no longitudinal and no transversal wall is provided inside the cooling part.

The aerosol generating article without additional element in the cooling part presents a simplified structure which can be easily and inexpensively manufactured.

Additionally, the cooling part forming the outlet end of the aerosol generating article, can be inserted into the mouthpiece to be used during a vaping session without creating a gap between the internal surface of the mouthpiece and the external surface of the cooling part. Alternatively, the cooling part can be in contact with the user’s mouth during a vaping session. Thus, the cooling part can be used as a mouthpiece.

In some embodiments, the paper a has basis weight comprised between 70 and 120 g/m2, preferably between 70 and 1 10 g/m2, more preferably between 70 and 105 g/m2 and even more preferably between 70 and 103 g/m2. In some embodiments, the basis weight of the paper is comprised between 72 and 120 g/m2, preferably between 78 and 120 g/m2 or between 75 and 110 g/m2, more preferably between 77 and 105 g/m2 and even more preferably between 78 and 100 g/m2. In some embodiments, the basis weight of the paper is comprised between 85 and 120 g/m2, preferably between 85 and 110 g/m2, more preferably between 85 and 105 g/m2 and even more preferably between 85 and 103 g/m2. In some embodiments, the basis weight of the paper is comprised between 90 and 120 g/m2, preferably between 90 and 110 g/m2, more preferably between 90 and 105 g/m2 and even more preferably between 90 and 103 g/m2 or between 95 and 103 g/m2. The basis weight of the paper is advantageously substantially equal to 100 g/m2.

In some embodiments, the paper has a thickness of at least 90 microns, preferably at least 100 microns, advantageously between 95 and 160 microns, more preferably between 100 and 150 microns, even more preferably between 100 and 140 microns, even more preferably between 100 and 130 microns, even more preferably between 100 and 125 microns. The thickness of the paper can be advantageously substantially equal to 125 microns.

Provided with such a thickness and/or basis weight, the wrapper presents good aerosol barrier and heat transfer properties while ensuring a suitable mechanical resistance to wrap the cooling part together with the aerosol generating substrate even if the cooling part is entirely hollow.

In some embodiments, the wrapper is formed of a single paper sheet of paper.

In other words, the wrapper according to this embodiment presents a single paper sheet. A single paper wrapper exhibits higher heat transfer properties than to a multilayer wrapper and good propensity to ignition. Moreover, the assembling method of the article using only a single sheet of wrapper is simpler, notably due to better physical properties than a multi-layer wrapper. Particularly, paper can more easily be wrapped around the aerosol generating substrate than a multi-layer wrapper. Additionally, unlike a multi-layer wrapper, a single sheet wrapper does not curl on one side as it can exchange moisture from both sides.

Additionally, paper is recyclable and the wrapper according to the invention can be disposed away as normal paper waste. In some embodiments, the wrapper is formed from a folded paper sheet. The folding can be performed along folding lines extending along the article axis. The folding lines define a pair of opposite narrow walls, also called lateral walls, and a pair of opposite wide walls, also called wider walls.

In some embodiments, the paper has a density at least 0,75 g/cm3.

Provided with these features, the wrapper can ensure a proper barrier to aerosol and similar or improved heat transfer properties as a conventional wrapper heated for example around 280°C. Particularly, the inventors have discovered that the density of the paper forming the wrapper of at least 0,75 g/cm3 ensures similar aerosol barrier properties and better heat transfer properties than a multi-layer wrapper provided notably with a metallic layer.

In some embodiments, the paper has a density comprised between 0,75 and 1 ,1 g/cm3, preferably between 0,75 and 1 ,0 g/cm3, more preferably between 0,75 and 0,9 g/cm3 and even more preferably between 0,75 and 0,85 g/cm3. In some embodiments, the density of the paper is comprised between 0,76 and 1 ,1 g/cm3, preferably between 0,76 and 1 ,0 g/cm3, more preferably between 0,76 and 0,9 g/cm3 and even more preferably between 0,76 and 0,85 g/cm3. In some embodiments, the density of the paper is comprised between 0,77 and 1 ,1 g/cm3, preferably between 0,77 and 1 ,0 g/cm3, more preferably between 0,77 and 0,95 g/cm3 and even more preferably between 0,77 and 0,9 g/cm3.

According to some embodiments, the paper sheet is substantially free of filler selected amongst: clay, titanium dioxide, talc or gypsum. Alternatively, the paper sheet is substantially free of filler presenting power products of mineral origin. These power products can be selected amongst: clay, titanium dioxide, talc or gypsum.

By “substantially free” of an element, it is understood that the percentage of the dry weight of this element in the corresponding substance (wrapper for example) is below a predetermined threshold. This predetermined threshold can be less than 2%, more preferably less than 1 % and even more preferably less than 0,5%.

The absence of fillers reduces the number of air voids and volumes filled with these fillers in the paper structure, which may act as insulators. So, heat can be transferred directly from the cellulose to the aerosol generating substrate that significantly improves the efficiency of vapour generation.

According to some embodiments, the wrapper is free of metal layer.

Preferably, the wrapper is also free of metal in powder or film as a layer or filler in the paper. Thus, the wrapper manufacturing can be particularly inexpensive and easy. Additionally, a wrapper comprising only a sheet of paper can be easily wrapped around the aerosol generating substrate and the cooling part to for the aerosol generating article. Finally, a wrapper free of metal can be recycled as normal paper waste.

In some embodiments, the wrapper is non-porous. In particular, the porosity of the paper is lower than 100 CU. preferably between 0 and 80 CU. In one example, the paper has a porosity of 40 CU.

The paper sheet forming the wrapper can be manufactured using calendaring to increase the density of the paper.

According to some embodiments, the aerosol generating substrate comprises an aerosol forming agent in an amount of at least 12 wt.%, preferably at least 15 wt.%, most preferably between 20 and 70 wt.% in dry weight of the substrate.

Suitable aerosol forming agents include: a polyol such as sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol; a non-polyol such as monohydric alcohols, acids such as lactic acid, glycerol derivatives, esters such as triacetin, triethylene glycol diacetate, triethyl citrate, glycerin or vegetable glycerin. In some embodiments, the aerosol forming agent may be glycerol, propylene glycol, or a mixture of glycerol and propylene glycol.

According to some embodiments, the aerosol generating substrate further comprises tobacco particles and/or inhalable agent, which contains at least one stimulant and/or flavor, a gelling agent for gelling the aerosol generating substrate.

In some embodiments, the aerosol generating substrate further comprises a binder amongst: cellulose derivative (e.g. CMC), hydroxy-alkylated carbohydrates, starch or combination thereof. In some embodiments, the gelling agent comprises non-protein containing polysaccharide, gellan gum, lecithin, agar or mixture thereof.

According to some embodiments, the cooling part comprise cellulosic material, an acetate or polymer material or combinations thereof.

According to some embodiments, the wrapper extends around the article axis, along the whole length of the cooling part and the substrate part. In other words, the wrapper extends along the longitudinal axis from the inlet end to the outlet end of the article and the same and unique wrapper can be used to wrap both the cooling part and the aerosol generating substrate. This wrapper can be made of a single sheet of paper Advantageously, no other wrapper or layer is used to wrap at least partially the cooling part and/or the aerosol generating substrate.

According to some embodiments, the wrapper delimits the cooling part and is in direct contact with the aerosol generating substrate. This means that no additional wrapper or layer is provided between the aerosol generating substrate and the wrapper made of a single paper sheet.

According to some embodiments, the cooling part is directly adjacent with the aerosol generating substrate. This means that there is no intermediate segments or components (e.g., filter segment) between the aerosol generating substrate and the cooling part.

In some embodiments, the article has a rod shape extending from along the article axis. Particularly, the rod can present a substantially constant cross-section having a circular, oval or rectangular shape. In case of a rectangular cross-sectional shape, the rod can present rounded or cornered edges.

In the preferred embodiment, the article has a flat cuboid shape extending along the article axis.

By “flat cuboid shape” of the aerosol generating article or at least one of its parts (cooling part or aerosol generating substrate), it is understood that it extends between two first parallel longitudinal planes and two second parallel longitudinal planes perpendicular to the first parallel longitudinal planes, the distance between the second parallel longitudinal planes being at least 3 times, advantageously 5 times and preferably 10 times, greater than the distance between the first parallel longitudinal planes.

For example, in some embodiments, the aerosol generating article can have a length between 10 and 40 mm, a width between 10 and 30 mm and depth between 0,5 and 3 mm and a surface area of the wider surface between 100 and 600 mm2.

The invention also concerns a manufacturing method of the aerosol generating article as defined above. The method comprises the following steps:

- forming a cooling part by wrapping the wrapper around a mandrel;

- removing the mandrel from the cooling part at the end of the manufacturing method.

The mandrel can thus be used to form the shape of the cooling part during the manufacturing. For example, the cross-sectional shape of the mandrel can correspond substantially to the cross-sectional shape of the cooling part.

The manufacturing can further comprise the step of locating an aerosol generating substrate inside the substrate part using the mandrel.

Provided with these features, the mandrel can be used for positioning the aerosol generating substrate first and then, for forming the cooling part. The step of locating may comprise the positioning of the generating substrate and the mandrel adjacent with each other before forming the cooling part. For example, the aerosol generating substrate can be first positioned on the sheet intending to form the wrapper. The mandrel can be positioned in alignment with the aerosol generating substrate on the sheet next to the aerosol generating substrate. The sheet can be then wrapped around the article axis forming thus the cooling part and the mandrel can be extracted. An aerosol generating article can thus be manufactured in a particularly fast and inexpensive way.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention and its advantages will be better understood upon reading the following description, which is given byway of non-limiting example and which is made with reference to the appended drawings, in which: - Figure 1 is a schematic view of an aerosol generating assembly comprising an aerosol generating device and an aerosol generating article according to the invention;

- Figure 2 is a perspective view of the aerosol generating article of Figure 1 ;

- Figure 3 is a partially exploded perspective view of the aerosol generating article of Figure 1 ; and

- Figure 4 is a schematic illustration of the manufacturing method according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

Before describing the invention, it is to be understood that it is not limited to the details of construction set forth in the following description. It will be apparent to those skilled in the art having the benefit of the present disclosure that the invention is capable of other embodiments and of being practiced or being carried out in various ways.

As used herein, the term “aerosol generating device” or “device” may include a vaping device to deliver an aerosol to a user, including an aerosol for vaping, by means of a heater element explained in further detail below. The device may be portable. “Portable” may refer to the device being for use when held by a user. The device may be adapted to generate a variable amount of aerosol, e.g. by activating the heater element for a variable amount of time (as opposed to a metered dose of aerosol), which can be controlled by a trigger. The trigger may be user activated, such as a vaping button and/or inhalation sensor. The inhalation sensor may be sensitive to the strength of inhalation as well as the duration of inhalation to enable a variable amount of vapour to be provided (so as to mimic the effect of smoking a conventional combustible smoking article such as a cigarette, cigar or pipe, etc.). The device may include a temperature regulation control to drive the temperature of the heater and/or the heated aerosol generating substance (aerosol pre-cursor) to a specified target temperature and thereafter to maintain the temperature at the target temperature that enables efficient generation of aerosol.

As used herein, the term “aerosol” may include a suspension of vaporizable material as one or more of: solid particles; liquid droplets; gas. Said suspension may be in a gas including air. Aerosol herein may generally refer to/include a vapour. Aerosol may include one or more components of the vaporizable material.

Figure 1 shows an aerosol generating assembly 10 comprising an aerosol generating device 11 and an aerosol generating article 12. The aerosol generating article 12 is intended to operate with the aerosol generating device 1 1 to generate aerosol as it will be explained in further detail below.

Referring to Figure 1 , the aerosol generating device 1 1 comprises a device body 15 extending along a device axis Y between a closed end 16 and an open end 17. The open end 17 presents an opening from which the aerosol generating article 12 can be inserted inside the device 11. The device body 15 delimits an internal space of the device 11 receiving various elements designed to carry out different functionalities of the device 11. This internal space can for example receive a battery for powering the device 1 1 , a control module for controlling the operation of the device 1 1 , a heating chamber 60 for heating the aerosol generating article 12, etc. In the example of Figure 1 , only the heating chamber 60 is shown. Particularly, the heating chamber 60 is designed to receive at least partially the aerosol generating article 12. In the example of Figure 1 , the heating chamber 60 may be for example arranged adjacent to the opening formed by the open end 17 of the device body 15. The heating chamber 60 may for example extend according to the device axis Y and present a cup shape. The heating chamber 60 may comprise a heater designed to heat at least a part of the aerosol generating article 12. The heater comprises for example a pair of heating plates facing each other and designed to heat opposite walls of the aerosol generating article 12 as it will be explained in further detail below. Each heating plate may comprise metal or ceramics or be made from metal or ceramics. Metal is preferably stainless steel (e.g., SAE 316L). According to other embodiments, the heater comprises any other mean or material suitable for heating the aerosol generating article, as for example a heating blade or a magnetic coil interacting with a heat-inductive element in contact with the aerosol substrate.

In the example of Figure 2, the aerosol generating article 12 presents a flat cuboid shape. In other words, in this example, the aerosol generating article 12 is a flat-shaped cuboid extending along an article axis X between an inlet end 18 and an outlet end 19, and having external dimensions LxWxD. In a typical example, the length L of the article 12 according to the article axis X equals substantially to 33 mm while its width W and depth D are substantially equal respectively to 12 mm and 1 ,2 mm. According to different examples, the values L, W and D can be selected within a range of +/- 40%, for example. The depth D of the aerosol generating article 12 is formed by a pair of parallel walls 23A, 23B, called hereinafter lateral walls 23A, 23B, and the width W of the aerosol generating article 12 is formed by a pair of parallel walls 24A, 24B, called hereinafter wider walls 24A, 24B. Since in the example of Figure 2 the aerosol generating article 12 presents a flat shape, each wider wall 24A, 24B is for example at least 5 times, advantageously 10 times, wider than each lateral wall 23A, 23B. The flat shape of the aerosol generating article 12 is thus defined by the ratio between each wider wall 24A, 24B and each lateral wall 23A, 23B, which is greater than 5, advantageously greater than 10. In some embodiments, the edges between the lateral and wider walls 23A, 23B, 24A, 24B can be rounded. According to other examples, the aerosol generating article 12 can have any other suitable shape, for example a cylindrical shape (i.e. rod shape) having a circular or oval or rectangular cross-section.

The aerosol generating article 12 comprises a substrate part 25 and a cooling part 26 arranged successively along the article axis X, as it is shown in Figures 2 and 3. The substrate part 25 may for example be slightly longer than the cooling part 26. For example, the length L2 of the substrate part 25 according to the article axis X may be substantially equal to 18 mm and the length L1 of the cooling part 26 according to the article axis X may be substantially equal to 15 mm. The substrate part 25 defines the inlet end 18 of the article 12 and the cooling part 16 defines the outlet end 19 of the article 12. The substrate part 25 and the cooling part 26 may be fixed one to the other by a wrapper 31 extending around the article axis X. In this case, the wrapper 31 forms the lateral and wider walls 23A, 23B, 24A, 24B of the aerosol generating article 12.

The substrate part 25 of the aerosol generating article 12 is designed to be received (for example through the opening formed by the device body 15) in the heating chamber 60 of the aerosol generating device 11 so as the article and device axes X, Y coincides, as it is shown in Figure 1 . The part of each wider wall 24A, 24B corresponding to the substrate part 25 of the article 12 is designed to be heated by the heating chamber 60 of the device 11 . Particularly, according to some embodiments, each of these parts is designed to be in contact with the heating plate forming the heater, as explained above. In some embodiments, the corresponding part of only one of the wider walls 24A, 24B is designed to be heated by the heater. Still according to some other embodiments, at least a part of at least one of the walls 23A, 23B, 24A, 24B, is designed to be heated distantly (i.e. without contact) by the heater of the heating chamber 6, for example by convection. The substrate part 25 comprises an aerosol generating substrate 35 shown in Figure 3. The aerosol generating substrate 35 extends according to the whole length of the substrate part 25 and forms a solid structure which is able to release aerosol upon heating. This solid structure can for example form a substantially cuboid shape. In some examples, the solid structure forms on its surface aerosol channels conducting aerosol. In some examples, the solid structure can have a corrugated shape in each its cross-section as shown in Figure 3. In this example, the corrugated shape defines a plurality of protruding regions and a plurality of valley regions. Each valley region forms an aerosol channel between its surface and an internal surface 36 of the wrapper 31 . Each protruding region is in direct contact with the internal surface 36 of the wrapper 31. The aerosol generating substrate 35 comprises an aerosol forming agent and a binder. The aerosol generating substrate 35 further comprises tobacco particles and/or inhalable agent, which contains at least one stimulant and/or flavour, a gelling agent for gelling the aerosol generating substrate.

According to different embodiments, the cooling part 26 is designed to form itself a mouthpiece or be received inside an external mouthpiece mountable on the device body 15. The cooling part 26 is intended to act as a cooler to cool the vapour before it is inhaled by the user. The cooling part 26 is hollow, advantageously entirely hollow. In other words, the cooling part 26 has a void delimited only by the internal surface 36 of the wrapper 31 .

Preferably, the wrapper 31 is formed of a single paper sheet. This paper sheet forms thus the internal surface 36 of the wrapper 31 as explained above and its external surface designed to be heated by the heater. The wrapper 31 extends according the article axis X between the inlet end 18 and the outlet end 19. In other words, the wrapper 31 extends according to the whole length of the substrate part 25 and the cooling part 26. Thus, the wrapper 31 covers entirely the aerosol generating substrate 35 and the cooling part 26 while keeping the ends 18, 19 transversally uncovered. In particular, the wrapper is tightly wrapped to the tobacco part without adhesive. The wrapper can be glued with an adhesive to the cooling part.

According to a particular example, the wrapper 31 , advantageously the single paper sheet forming the wrapper, defines the following characteristics:

These characteristics ensure to the wrapper 31 the necessary mechanical resistance to form the hollow cooling part 26.

This wrapper 31 is preferably essentially non-porous. The porosity of the wrapper is preferably lower than 100 CU.

To manufacture an aerosol generating article 12 according to the invention, the sheet intended to form the wrapper 31 may be first positioned on a support, as it is shown in part A of Figure 4. The sheet can comprise axially extending folding lines. Then, the aerosol generating substrate 35 can be positioned in the part of the wrapper 31 intended to form one of the wider walls 24A, 24B of the substrate part 25. The substrate 35 can for example be positioned using a mandrel 70 from the end of the wrapper 31 designed to form the outlet end 19, as it is shown in part B of Figure 4. The mandrel 70 can be movable according to the article axis X. Then, before extracting the mandrel 70, the wrapper 31 can be wrapped around the mandrel 70 to form the hollow cooling part 26, as it is shown in part C of Figure 4. Thus, the mandrel 70 acts as a support to form the hollow cooling part 26. Finally, the mandrel can be extracted from the outlet end 19 of an assembled aerosol generating article 12 as shown in part D of Figure 4.

Claims

1 . An aerosol generating article (12) for delivering aerosol when heated in an aerosol generating device (11 ); the aerosol generating article (12) extending along an article axis (X) between an inlet end (18) and an outlet end (19) and having a flat cuboid shape extending along the article axis (X); wherein the aerosol generating article (12) comprises:

- a cooling part (26);

- a substrate part (25) positioned sequentially with the cooling part (26) along an article axis (X) and comprising an aerosol generating substrate (35);

- a wrapper (31 ) arranged for wrapping the substrate part (25) and the cooling part (26); wherein the cooling part (26) is entirely hollow and forms the outlet end (19) of the aerosol generating article (12); wherein the wrapper (31 ) comprises paper having a basis weight comprised between 75 g/m2 and 120 g/m2 and a thickness comprised between 95 pm and 160 pm.

2. The aerosol generating article (12) according to claim 1 , wherein the basis weight of paper is comprised between 85 and 1 10 g/m2, and preferably between 95 and 103 g/m2.

3. The aerosol generating article (12) according to claim 2, wherein the basis weight of paper is substantially equal to 100 g/m2.

4. The aerosol generating article (12) according to any one of the preceding claims, wherein the thickness of paper is comprised between 100 pm and 150 pm, more advantageously between 100 pm and 140 pm, more advantageously between 100 pm and 130 pm and even more advantageously between 100 and 125 pm.

5. The aerosol generating article (12) according to claim 4, wherein the thickness of paper is substantially equal to 125 pm.

6. The aerosol generating article (12) according to any one of the preceding claims, wherein the density of paper is at least 0,75 g/cm3.

7. The aerosol generating article (12) according to any one of the preceding claims, wherein the wrapper (31 ) is formed of a single paper sheet of paper.

8. The aerosol generating article (12) according to any one of the preceding claims, wherein the wrapper (31 ) is free of metal layer.

9. The aerosol generating article (12) according to any one of the preceding claims, wherein the aerosol generating substrate (35) comprises an aerosol forming agent in an amount of at least 12 wt.%, preferably at least 15 wt.%, most preferably between 20 and 70 wt.% in dry weight of the substrate.

10. The aerosol generating article (12) according to any one of the preceding claims, wherein the wrapper (31 ) extends around the article axis (X), along the whole length of the cooling part (26) and the substrate part (25).

1 1 . The aerosol generating article (12) according to any one of the preceding claims, wherein the wrapper (31 ) delimits the cooling part (26) and is in direct contact with the aerosol generating substrate (35).

12. The aerosol generating article (12) according to any one of the preceding claims, wherein the cooling part (26) is directly adjacent with the aerosol generating substrate (35).

13. The aerosol generating article (12) according to any one of the preceding claims, wherein the wrapper (31 ) is formed from a folded paper sheet performed along folding lines extending along the article axis (X), advantageously the folding lines define a pair of opposite lateral walls (23A, 23B) and a pair of opposite wider walls (24A, 24B).

14. A manufacturing method of the aerosol generating article (12) according to any one of the preceding claims, comprising the following steps:

- forming a cooling part (26) by wrapping the wrapper around a mandrel;

- removing the mandrel from the cooling part (26) at the end of the manufacturing method.

15. The manufacturing method according to claim 14, further comprising the following step: - locating an aerosol generating substrate (35) inside the substrate part (25) using the mandrel.