WO2000028843A1

WO2000028843A1 - System for supplying an inhalable aerosol

Info

Publication number: WO2000028843A1
Application number: PCT/EP1999/008428
Authority: WO
Inventors: Thomas Pienemann
Original assignee: H.F. & Ph.F. Reemtsma Gmbh
Priority date: 1998-11-12
Filing date: 1999-11-08
Publication date: 2000-05-25
Also published as: EP1128741A1; DE19854005A1; DE19854005C2; AU6476899A

Abstract

A system for supplying an inhalable aerosol contains a substrate portion (1') and an inhaling device. The substrate portion (1') has at least one heat resistor and contains an aerosol-forming material inside a casing which has an air inlet and an aerosol outlet. The casing of the substrate portion (1') is preferably electroconductive at least in sections and forms the at least one heat resistor. The inhaling device has a housing (50), a receiving device for holding the substrate portion (1') and contacts (55, 57) which are or can be connected to a voltage source (51) for supplying electrical power to the at least one heat resistor of the substrate portion (1').

Description

Inhalable aerosol delivery system

The invention relates to a system for providing an inhalable aerosol and the components of such a system. This system is particularly suitable as a smoking article for providing smoke aerosol for smokers.

When conventional cigarettes are smoked, most of the tobacco is not burned during the trains, but during breaks. This leads to the formation of so-called sidestream smoke, which is often perceived as nuisance by non-smokers.

To overcome this problem, numerous new smoking articles that do not burn tobacco during train breaks have been proposed. A common principle of such developments is that it is not the heat of combustion of the tobacco but other energy sources that are used to release the smoke aerosol. This not only largely avoids the production of sidestream smoke, but also changes in the temperature during the trains can also favor the release of aroma substances and reduce the formation of irritating or undesirable by-products. In the proposed smoking articles for aerosol formation, substitute materials such as special film tobacco or carrier materials loaded with aroma substances are frequently used instead of tobacco. For example, a cigarette-shaped smoking article is known in which the thermal energy of a smoldering carbon element is transferred to an aluminum capsule which is arranged inside the cigarette and contains an aerosol-forming material.

In a modification of this smoking article, a special film tobacco loaded with high amounts of glycerin is used as the aerosol-forming material.

Both of the above-mentioned smoking articles have in common that the combustion gases of the heating element are inhaled with the smoke aerosol, which leads to an increased absorption of carbon dioxide by the smoker. The spatial separation of energy source and aerosol generator leads to a taste deficit on the first puffs due to the difficult heat transfer. Furthermore, the entire smoking article, which in contrast to conventional cigarettes maintains its length, must be disposed of after smoking. This leads to an increased incidence of complex residues and associated disposal problems.

Another previously known smoking article works according to a different principle. A cigarette-shaped object with a filter and tobacco part is inserted into an electronically controlled smoking device at the tobacco end. In the smoking device, the tobacco-containing part is heated with the help of electrical heating elements at locations radially consecutive with the trains. This principle requires a complex construction of the smoking device, which must be equipped with several heating elements and a complicated electronic control. The handling of such a device is complex due to its size and design and differs significantly from that of a conventional cigarette.

It is an object of the present invention to provide a system for providing an inhalable aerosol which has a simple basic structure and in particular as a smoking article can serve, which offers a similar taste impression as conventional cigarettes, but when used, no sidestream smoke is generated between the trains.

This object is achieved by a system with the features of claim 1, which has an inhalation device with the features of claim 33 and a substrate portion with the features of claim 35 and can have a mouthpiece with the features of claim 39. Advantageous embodiments of the invention result from the dependent claims.

The system according to the invention for providing an inhalable aerosol is particularly suitable as a smoking article, the functioning of which is based on the heating of an aerosol-forming material during the trains. A preferably cylindrical portion of substrate, which has at least one heating resistor and contains the aerosol-forming material within a casing, is smoked in a special, preferably cigarette-shaped or cigar-shaped inhalation device. The wrapping of the substrate portion, which for this purpose is electrically conductive at least in sections, preferably serves as the heating resistor. The portion of substrate is heated in the inhalation device during the trains by supplying electrical energy into the conductive casing, so that aerosol is formed, which can be absorbed by the smoker by drawing air through the air inlet opening of the casing via the aerosol outlet opening of the casing. The use of the smoking article prevents the formation of sidestream smoke during train breaks.

The basic principle of the invention is therefore based on the closest possible spatial arrangement of the heat source and aerosol former. This is achieved in that the substrate portion itself has the heating resistor (or also several heating resistors), which is preferably designed as a conductive covering of the substrate portion and is heated by applying a voltage across the contacts in the inhalation device. Compared to the previously mentioned previously known smoking articles, the system according to the invention has the advantage that, despite the simple construction, no combustion gases are inhaled and the residues remaining after use can be made environmentally compatible.

The invention is explained in more detail below on the basis of exemplary embodiments. The drawings show in

La is a perspective view of a portion of substrate according to the invention,

Fig. Lb shows a longitudinal section through the substrate portion

Figure la,

1c shows a cross section through the substrate portion according to FIG. 1a,

2a shows a longitudinal section through another embodiment of a substrate portion according to the invention, which has an integrated mouthpiece,

2b is a perspective view of an embodiment of a substrate portion in which a number of axially spaced zones of electrical conductivity are provided,

2c shows a perspective view of an embodiment of a substrate portion in which a number of zones of electrical conductivity spaced apart in the circumferential direction are provided,

3 shows a schematic longitudinal section through an inhalation device according to the invention, into which the substrate portion according to FIG. 2a is inserted and which has a separate rates housing for control components and power supply,

4a shows a schematic longitudinal section through another embodiment of an inhalation device according to FIG

Invention which is constructed for the use of a separate mouthpiece and which has a separate housing for control components and power supply, with inserted substrate portion and inserted mouthpiece,

4b is an illustration of the use of the system according to FIG. 4a by a smoker and

5 shows a schematic longitudinal section through a further embodiment of an inhalation device according to the invention, which is designed for the use of a separate mouthpiece and in which the power supply is located in the housing, with the substrate portion and the mouthpiece inserted.

A preferred embodiment of a substrate portion 1 is shown in Figures la to lc. In the exemplary embodiment, the substrate portion 1 has a cylindrical shape, as can be seen from FIGS. 1 a to 1 c. It contains an aerosol-forming material 2 which is surrounded by an electrically conductive sheath 3 arranged radially (i.e. on the cylinder jacket).

The aerosol-forming material 2 can consist, for example, of cut leaf tobacco, cut tobacco ribs, reconstituted tobacco or a carrier material treated with aroma substances. Leaf and rib cuts can also be used in expanded form, as is obtained, for example, by using the method described in the patents DE 29 03 300, DE 31 19 330 and DE 34 14 625. Both organic materials such as, for example, can be used as carrier materials for flavorings Paper as well as inorganic such as silica gel are used. Any mixtures of the components mentioned can also be used.

In the preferred embodiment, material 2 contains about 3% to 30% volatile polyol, e.g. Glycerin or propylene glycol to increase aerosol formation. Another way of increasing aerosol formation is to use the aerosol-forming materials with a moisture which is significantly above the equilibrium moisture. For example, Tobacco, whose equilibrium moisture is around 10% to 12%, can be used with a moisture content of 20%. In this case, suitable packaging must be used to ensure that there is no loss of moisture until use.

The electrically conductive sheathing 3 can consist of paper or film tobacco provided with conductive additives (such as metals or graphite / carbon) or a plastic film likewise made conductive by additives. A multi-layer wrapping can also be used, the inner layer consisting of paper or film tobacco and the outer layer made of one of the conductive materials mentioned.

It is also possible to first form the covering from a non-conductive material and then to apply a conductive film before or after the covering of the aerosol-forming material, e.g. by steaming or spraying.

Substrate portions 1 can be produced in a simple manner on a conventional cigarette rod making machine: First, an endless strand of tobacco or substitute material is formed in a format part; this is surrounded by the conductive wrapping material supplied in the direction of manufacture by a bobbin and glued to a seam. Then cut to the desired dimensions. Another possibility of production is the extrusion of a suitable aerodynamic sol-forming material through a round nozzle with subsequent wrapping and cutting of the extrudate.

The diameter of a substrate portion 1 is preferably in the range from 5 mm to 12 mm and the length in the range from 10 mm to 100 mm. Diameters from 5 mm to 10 mm and lengths from 15 mm to 60 mm are particularly preferred.

In a preferred embodiment, the substrate portion 1, as shown in FIG. 2a, is connected to a mouthpiece 10 by a common covering 11. The manufacture of such a composite is familiar to the person skilled in the art from the manufacture of filter cigarettes. The substrate portion 1 can additionally have an increased electrical conductivity in zones 12 compared to the rest of the casing, which e.g. can be achieved by wrapping metal foil in zones 12 to improve electrical contact with the contacts in an inhaler (see below).

While the substrate portion in the embodiment of the substrate portion according to FIG. 2a is set up as a single, contiguous heating resistor, further embodiments of the substrate portion provide a segmented or section-wise division of the electrical conductivity of the casing. This can e.g. as in Figure 2b or as shown in Fig. 2c.

The wrapping of the substrate portion according to FIG. 2b has a number of annular zones 13 with a relatively high electrical conductivity, two adjacent zones 13 being separated by an insulating zone. Each of the zones 13 forms a separate heating resistor which can be supplied with current individually in an inhalation device which is matched to the substrate portion via corresponding contacts in the inhalation device. The position of such contacts is indicated in Fig. 2b by arrows and the polarities "+" and "-". In a variant of this embodiment, the individual run Zones 13 do not extend over the entire circumference of the substrate portion, but each have an isolating interruption. In another variant, the zones 13 are electrically conductively combined in a zone which extends along the substrate portion and runs, for example, along the contact points "-" (or the contact points "+") according to FIG. 2b, so that in the inhalation device for this pole in the manner of a ground connection, only one contact must be present.

In the embodiment of a substrate portion shown in FIG. 2c, the envelope of the substrate portion has a number of electrically conductive zones 15 which are offset and insulated from one another in the circumferential direction. The zones 15 serving as separate heating resistors extend over the length of the substrate portion. In an end region of the substrate portion, they are electrically conductively folded together by a ring-like contact zone 14, the electrical resistance of the contact zone 14 preferably being less than that of a zone 15. At this end, only one "-" in an inhalation device adapted to the substrate portion -Contact required, while at the other end a number of contacts is provided, which are marked with arrows in FIG. 2c and labeled with "+". The "+" contacts enable the zones 15 to be controlled separately. In order to ensure the required alignment of the substrate portion in the inhalation device in a defined angular position, in the exemplary embodiment a positioning device in the form of a notch 16 is provided, into which the substrate portion is inserted into the inhalation device a corresponding guide projection engages on the inhalation device.

An embodiment of an inhalation device (hereinafter referred to as a smoking device) is described below with reference to FIG. 3. This smoking device is set up for use with a substrate portion according to FIG. 2a. As FIG. 3 shows, there are two contacts (electrodes) 21 and 22 in a housing 20, via which the contact for the conductive sheathing of a portion of the substrate received by the smoking device is produced. The cavity in the interior of the housing 20 and the contacts 21 and 22 form a receiving device for holding the substrate portion. Air can be drawn through the substrate portion through an opening 24. Via an electrical connection 25, the contact 21 is connected directly to a supply unit 30 arranged in a separate housing. The connection to contact 22 runs via a switch 23, with which the circuit can be closed. The supply unit 30 contains a battery or an accumulator 31 and optionally a controller 32. In the case of an accumulator, it can be charged via plug contacts 33.

The smoking device is used as follows: The smoking device is connected to the supply unit 30 via a cable (connection 25) (see also FIG. 4b). The substrate portion 1 provided with the mouthpiece 10 is pushed into a conically shaped opening on one of the end faces of the housing 20 until it reaches a stop at the contact 21, see FIG. 3. The smoking device is now guided to the mouth and the switch 23 is actuated. By closing the circuit, the portion of substrate is heated by the current flowing through contacts 21 and 22 through the sheath acting as a heating resistor, and the resulting aerosol can be removed through mouthpiece 10. Switching off takes place by releasing the switch 23 or by the control 32. In this way, several trains can be removed. After use, the substrate portion 1 is removed from the smoking device with the mouthpiece 10 and disposed of. From time to time it is necessary to change the battery or charge the accumulator 31 in the supply unit 30.

FIG. 4a shows another embodiment of the system, which differs from the previous one in that the mouthpiece 10 'and substrate portion 1' are not connected to one another. The Mouthpiece 10 'is inserted into a base 42, which is screwed to the housing 40 after the substrate protection 1' has been inserted into a smoking device which has a housing 40. The base 42 also serves as a contact. The function and use of this smoking device and the other components of the system otherwise correspond to the previous exemplary embodiment. 4a shows the second contact with 41, the switch with 43, the opening for the air supply with 44, the connecting cable with 45, the supply unit with 30 ', the battery or the accumulator with 31', the control with 32 ' and the plug contacts designated 33 '.

The use of the smoking article is shown in Figure 4b. The smoking device with mouthpiece and substrate portion can be handled like a conventional cigarette; the supply unit is preferably in a breast pocket, belt holder, etc. carried. Both parts are connected to one another by a highly flexible cable (connecting cable 45) of sufficient length.

A one-piece embodiment of the smoking device with a cigar-like shape is shown in FIG. A housing 50 has a screw-off cap 53 at the front end, through which a battery or an accumulator 51 can be replaced. A pivotable flap 52, which is also shown in the swung-open state, is used to insert a substrate portion 1 ". When the flap 52 is opened, a receiving part 55 is simultaneously moved backwards against the force of a coil spring 56 in order to insert the substrate To facilitate substrate portion 1 ". The force of the coil spring 56, which acts when the flap 52 is closed, fixes the substrate portion 1 ″ between a contact 57 and the receiving part 55, which simultaneously serves as a counter-contact. By closing a switch 60, current flows between the contacts 55, 57 via the conductive sheath Portion of substrate 1 "so that it is heated. The smoke aerosol can be removed by pulling on a mouthpiece 10 ″ inserted into the receiving part 55. be taken, which is designed as a separate component and in this embodiment is not firmly connected to the substrate portion 1 ". Air flows in through a channel 54 and enters the substrate portion 1" at the front end of the substrate portion 1 ".

In a smoking device, which is set up for the use of a substrate portion according to FIG. 2b or according to FIG. 2c, there are contacts which are assigned in pairs to zones 13 and 15 serving as heating resistors. If, as described above, a common pole is put together in an electrically conductive manner, only one contact need be present for this. A new part of the substrate portion can be heated by sequential power supply to each zone 13 or 15, whereby a more uniform aerosol yield is achieved via the trains. This results in a largely constant range of flavors per train. The control can take place, for example, via a train detector, which reacts to the pressure change when air is announced by the user and effects the power supply of one of the zones 13 and 15 via a switching device. On the next train, the switching device responds again, but an electronic circuit ensures that the heating current is applied to another, not yet used zone 13 or 15 this time via the assigned contacts, etc.

For the construction of the mouthpiece 10, 10 'or 10 ", basically all principles known to the person skilled in the cigarette industry can be used. In the simplest case, the mouthpiece consists of a hollow paper or cardboard roll. However, the design as a filter mouthpiece is preferred. In this case, a filter material such as cellulose acetate, polypropylene or paper can be provided with a single- or multi-layer cover, or a construction corresponding to the known multiple filters can be used, in which several segments with different properties are arranged one behind the other in the axial direction and are connected by an outer cover. In this In this case, one or more segments can be provided with axial bores. In all of the constructions mentioned, there is also the possibility of using a zone-perforated covering or a subsequent perforation of the covering, for example with the aid of a laser beam. As a result, the smoke can be diluted in the trains by the inflow of outside air.

Further variants of the system or its components result directly from the claims.

Another example of a substrate portion with mouthpiece and its use in the system is given below.

example

An American blend tobacco blend containing

30% Burley tobacco

40% expanded Virginia tobacco 20% unexpanded Virginia tobacco and

10% oriental tobacco

was conditioned and sprayed with 12% by weight of an aqueous casing with a glycerol content of 80% by weight. The tobacco was then cut with a 0.8 mm cutting width and dried to a moisture content of 12%. 180 kg of this cut tobacco was mixed with 20 kg of expanded rib cut.

From this mixture, an endless strand with a diameter of 6 mm and a plug density of 200 mg / ml was produced on a cigarette rod machine. An air-impermeable paper made conductive by adding graphite was used as the wrapping material. The endless strand was cut into individual portions of 40 mm in length, and these were connected in a known manner to an acetate filter plug using a tip paper. The substrate portion obtained in this way was smoked in a smoking device according to FIG. 3 without any visible amounts of sidestream smoke being produced. The taste was assessed by subjects as uniform and equivalent to that of conventional cigarettes.

Claims

claims

System for providing an inhalable aerosol, with

- A substrate portion (1; 1 '; 1 "), which has at least one heating resistor (3; 13; 15) and contains aerosol-forming material (2) within an envelope (3), the envelope (3) having an air inlet opening and an aerosol outlet opening has, and

- An inhalation device comprising a housing (20; 40; 50), a receiving device for holding the substrate portion (1; 1 '; 1 ") and with a voltage source (31; 31'; 51) contacts which can be connected or connected (21, 22; 41, 42; 55, 57) for supplying electrical power to the at least one heating resistor (3; 13; 15) of the substrate portion (1; 1 '; 1 ").

System according to Claim 1, characterized by a mouthpiece (10; 10 '; 10 ") which can be connected separately (10'; 10") to the inhalation device or is connected to the substrate portion (1) and in the operating state to the aerosol outlet opening of the substrate portion (1; 1 '; 1 ") is connected.

System according to claim 1 or 2, characterized in that the covering (3) of the substrate portion (1; 1 '; 1 ") is at least partially electrically conductive and is set up as at least one heating resistor (3; 13; 15).

System according to claim 3, characterized in that the covering (3) of the substrate portion is set up as a single coherent heating resistor.

System according to claim 3, characterized in that the substrate portion has a longitudinal axis and the envelope of the substrate portion has a number of heating resistors (13) which are axially offset and insulated from one another, which are preferably combined in an electrically conductive manner in a zone extending along the substrate portion.

6. System according to claim 3, characterized in that the substrate portion has a longitudinal axis and the envelope of the substrate portion has a number in the circumferential direction offset and mutually insulated heating resistors (15) which preferably extend over the length of the substrate portion and which preferably in one End region (14) of the substrate portion are folded together in an electrically conductive manner, the substrate portion preferably having a positioning device (16) adapted to the inhalation device for insertion into the inhalation device in a defined angular position.

7. System according to any one of claims 3 to 6, characterized in that the covering (3) of the substrate portion (1; 1 '; 1 ") metal foil, metal-coated or metal-containing paper, carbon-containing paper, graphite-containing paper, an electrically conductive film, with has conductive additives provided plastic film and / or foil tobacco provided with conductive additives.

8. System according to one of claims 3 to 7, characterized in that the covering (3) of the substrate portion (1; 1 '; 1 ") has several layers of wrapping materials, the outer layer having electrically conductive material and the inner layer preferably consists of paper or foil tobacco.

9. System according to one of claims 3 to 8, characterized in that the covering (3) of the substrate portion (1; 1 '; 1 ") in the area between the contact points to the two a heating resistor (3; 13; 15) assigned Contacts (21, 22; 41, 42; 55, 57) of the inhalation device has an electrical resistance of 0.1 ohms to 1000 ohms.

10. System according to one of claims 3 to 9, characterized in that with the contacts (21, 22; 41, 42; 55, 57) of the inhalation device can be brought into contact zones (12) of the envelope (3) of the substrate portion (1 ) have an increased electrical conductivity compared to the rest of the material of the casing (3), preferably by means of a metal coating.

11. System according to one of claims 1 to 10, characterized in that the substrate portion (1; 1 '; 1 ") has a cylindrical shape with a length of 10 mm to 100 mm, preferably from 15 mm to 60 mm, and a diameter from 4 mm to 12 mm, preferably from 5 mm to 10 mm.

12. System according to one of claims 3 to 10 and according to claim 11, characterized in that the at least partially electrically conductive sheath (3) of the substrate portion (1; 1 '; 1 ") is arranged as a cylinder jacket and the end faces of the cylinder as an air inlet opening and are set up as an aerosol outlet opening.

13. System according to one of claims 1 to 12, characterized in that the aerosol-forming material (2) of the substrate portion (1; 1 '; 1 ") has cut tobacco, cut tobacco ribs, cut tobacco and / or an extruded tobacco material.

14. System according to one of claims 1 to 13, characterized in that the aerosol-forming material (2) of the substrate portion (1; 1 '; 1 ") has a carrier material acted on with aroma substances.

15. System according to one of claims 1 to 14, characterized in that the aerosol-forming material (2) of the substrate portion (1; 1 '; 1 ") an evaporable polyol, preferably glycerol or propylene glycol, in a proportion of 5 wt .-% contains up to 50% by weight, preferably from 10% by weight to 30% by weight.

16. System according to one of claims 1 to 15, characterized in that the inhalation device has at least one switch (23; 43; 60) for the at least one heating resistor (3; 13; 15).

17. System according to any one of claims 1 to 16, characterized in that the inhalation device has a tension detector which, together with a switching device, is set up for this by a heating resistor (3; 13; 15) of the substrate portion (1; 1 '; 1 ") to switch the leading circuit as a function of the flow velocity directed towards the air inlet opening of the substrate portion (1; 1 '; 1").

18. System according to one of claims 1 to 17, characterized in that the inhalation device a circuit, preferably an electronic circuit (32; 32 '), for controlling the at least one heating resistor (3; 13; 15) of the substrate portion (1st ; 1 '; 1 ") has output.

19. System according to claim 18 in connection with claim 4, characterized in that the circuit (32; 32 ') of the inhalation device is set up to the voltage or the current for the heating resistor (3) of the substrate portion (1; 1'; 1 ") to be controlled in such a way that the heating power is set to a higher value on the first train than in the subsequent trains, and to interrupt the power supply after a defined train time in order to avoid overheating.

20. System according to claim 18 in conjunction with claim 5 or 6, characterized in that the circuit (32; 32 ') of Inhalation device is set up to sequentially activate contacts assigned to the individual heating resistors (13; 15) in order to switch on the individual heating resistors (13; 15) sequentially.

21. System according to one of claims 18 to 20, characterized in that the circuit is housed inside the housing of the inhaler.

22. System according to any one of claims 18 to 20, characterized in that the circuit (32; 32 ') is housed in a separate housing (30; 30') which with the housing (20; 40) of the inhalation device via a cable (25; 45) is connected or connectable.

23. System according to one of claims 1 to 22, characterized in that a battery or an accumulator (31; 31 '; 51) is provided for the power supply to the contacts (21, 22; 41, 42; 55, 57) of the inhalation device which is accommodated or can be accommodated in the housing (50) of the inhalation device or in a separate housing (30; 30 ').

24. System according to one of claims 1 to 23, characterized in that the housing (50) of the inhalation device has a cigar-like shape.

25. System according to one of claims 1 to 23, characterized in that the housing (20; 40) of the inhalation device has a cigarette-like shape.

26. System according to one of claims 2 to 25 in conjunction with claim 2, characterized in that the mouthpiece (10; 10 '; 10 ") has a length of 10 mm to 50 mm and a diameter of 4 mm to 12 mm.

27. System according to one of claims 2 to 26 in conjunction with claim 2, characterized in that the mouthpiece (10; 10 '; 10 ") has a hollow paper or cardboard sleeve.

28. System according to one of claims 2 to 26 in conjunction with claim 2, characterized in that the mouthpiece (10; 10 '; 10 ") is designed as a filter mouthpiece, the filter material preferably having cellulose acetate, paper, myria and / or polypropylene has a single or multi-layer paper wrapping.

29. System according to claim 28, characterized in that the mouthpiece (10; 10 '; 10 ") has a filter plug made of several partial elements arranged one behind the other in the axial direction, of which preferably have one or more axial bores.

30. System according to one of claims 2 to 29 in conjunction with claim 2, characterized in that the mouthpiece (10; 10 '; 10 ") has one or more perforation zones.

31. System according to one of claims 2 to 30 in conjunction with claim 2, characterized in that the substrate portion (1) and the mouthpiece (10) have a similar diameter and are interconnected.

32. System according to claim 31, characterized in that the substrate portion (1) and the mouthpiece (10) are connected by a common wrapping (11) with a mouthpiece covering paper.

33. inhalation device, with a housing (20; 40; 50), with a receiving device for holding a substrate portion (1; 1 '; 1 ") containing an aerosol-forming material and with a voltage source (31; 31'; 51) in connection standing or connectable contacts (21, 22; 41, 42; 55, 57) for supplying electrical power to at least one heating resistor of the substrate portion (1; 1 '; 1 ").

34. Inhaler according to claim 33, characterized by features of the inhaler from one of claims 16 to 25.

35. Substrate portion which is set up for use with an inhalation device according to claim 33 or 34 and which has at least one heating resistor (3; 13; 15) and contains aerosol-forming material (2) within a covering (3), the covering (3) has an air inlet opening and an aerosol outlet opening.

36. Substrate portion according to claim 35, characterized by features of the substrate portion (1; 1 '; 1 ") from one of claims 3 to 15.

37. Substrate portion according to claim 35 or 36, characterized by a mouthpiece (10) which is connected to the substrate portion (1) and is connected to the aerosol outlet opening of the substrate portion (1).

38. Substrate portion according to claim 37, characterized in that the mouthpiece (10; 10 '; 10 ") features from one of claims 26 to 32.

39. Mouthpiece, which is set up for use with an inhalation device according to claim 33 or 34, can be connected separately (10 '; 10 ") to the inhalation device and, in the operating state, is connected to the aerosol outlet opening of the substrate portion (1'; 1").

40. Mouthpiece according to claim 39, characterized by features of the mouthpiece (10 '; 10 ") from one of claims 26 to 30.