AEROSOL GENERATING SUBSTRATE ELEMENT WITH THICK PAPER
Patent Information
- Authority / Receiving Office
- MX · MX
- Patent Type
- Patents
- Current Assignee / Owner
- PHILIP MORRIS PRODUCTS SA
- Filing Date
- 2022-05-27
- Publication Date
- 2026-05-19
Abstract
Description
AEROSOL GENERATING SUBSTRATE ELEMENT WITH THICK PAPER Field of invention This description refers to a thick paper used in an aerosol-generating substrate element. The thick paper surrounds an aerosol-generating substrate to form the aerosol-generating substrate element. Background of the invention Aerosol-generating articles are known in the art in which an aerosol-generating substrate, such as a tobacco-containing substrate, is heated rather than burned. Typically, in such heated aerosol-generating articles, an aerosol is generated by heat transfer from a heat source to a physically separate aerosol-generating material or substrate, which may be located in contact with, within, around, or downstream of the heat source. During use of the aerosol-generating article, volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source and are carried in the air drawn through the article. As the released compounds cool, they condense to form an aerosol. The paper used to wrap the aerosol-generating substrate and form the aerosol-generating element can absorb aerosol former, water, and other liquid compounds found in the mainstream smoke or aerosol passing through the aerosol-generating article, or from the moisture or hydration surrounding the paper. The absorbed liquid can stain or weaken the paper and adversely affect the appearance and structural integrity of the aerosol-generating article. Heated aerosol-generating articles are particularly susceptible to wetting and cracking due to the high levels of aerosol former in the aerosol-generating substrate of these heated aerosol-generating articles.Heated aerosol generating articles are particularly susceptible to swelling as the aerosol components are absorbed by the casing, leading to difficult removal of the heating device. A resistive heating blade can be inserted into the aerosol generating substrate to heat it and release volatile compounds. The resistive heating blade can provide a heat source located within the aerosol generating substrate, positioned along a central axis. The substrate around the periphery or interface with the paper wrapper may not be sufficiently heated by the centrally located resistive heating blade, resulting in unused aerosol generating substrate within the aerosol generating element. It would be desirable to provide a visually and mechanically stable aerosol-generating substrate element, particularly for non-combustible heating aerosol-generating substrates containing a high level of liquids or aerosol formers. It would also be desirable for this thick paper layer not to affect the taste of the aerosol generated by the aerosol-generating substrate element. It would be desirable to provide an aerosol-generating substrate element that reduces the amount of unused aerosol-generating substrate within the aerosol-generating element. ncfrQnn / zznz / E / YiAi It would be desirable to provide an aerosol-generating substrate element wrapped by a single turn of a thick paper layer. It would also be desirable that this wrapping does not burn easily if it is near a heating element and does not negatively affect the heating of the substrate generating the non-combustion heating aerosol. A purpose of the invention may be to solve at least partially one or more of the desirable technical benefits mentioned above. Description of the invention In accordance with this description, an aerosol-generating substrate element is provided, comprising an aerosol-generating substrate and at least one paper layer surrounding the aerosol-generating substrate. The paper layer has a thickness in the range of approximately 78 micrometers to approximately 160 micrometers. Preferably, the aerosol-generating substrate element includes an aerosol-generating substrate having a glycerin content of between 10% and approximately 30%, and at least one paper layer surrounding the aerosol-generating substrate. The paper layer has a thickness ranging from approximately 78 micrometers to approximately 160 micrometers, wherein at least approximately 80% of the circumference of the aerosol-generating substrate is enclosed by fewer than two paper layers. Preferably, the paper layer has a thickness in the range of approximately 78 micrometers to approximately 140 micrometers, or approximately 100 micrometers to approximately 140 micrometers, or approximately 125 micrometers to approximately 140 micrometers. Preferably, the paper layer has a thickness in the range of approximately 90 micrometers to approximately 140 micrometers, or approximately 110 micrometers to approximately 140 micrometers, or approximately 130 micrometers to approximately 140 micrometers. The paper layer may not extend beyond the ends of the aerosol-generating substrate. Preferably, at least approximately 80%, or at least approximately 90%, or at least approximately 95% of the circumference of the aerosol-generating substrate may be enclosed by fewer than two layers of paper. Preferably, these fewer than two layers of paper do not extend beyond a certain length of the aerosol-generating substrate. Preferably, at least approximately 80%, or at least approximately 90%, or at least approximately 95% of the circumference of the aerosol generating substrate is circumscribed by less than two layers of paper that circumscribe the aerosol generating substrate along essentially a length of the aerosol generating substrate. Preferably, the aerosol-generating substrate defines an essentially cylindrical shape. The aerosol-generating substrate can define an essentially cylindrical shape having a diameter in the range of approximately 6.8 mm to approximately 7.1 mm. The aerosol-generating substrate can define an essentially cylindrical shape having a diameter in the range of approximately 6.8 mm to approximately 7.0 mm. The paper layer can have a paper thickness to tobacco substrate diameter ratio in the range of approximately 1:120 to approximately 1:40, or approximately 1:100 to approximately 1:50, or approximately 1:70 to approximately 1:50, or approximately 1:60 to approximately 1:50. ncfrQnn / zznz / E / YiAi The aerosol-generating substrate may include homogenized tobacco material. The homogenized tobacco material may include tobacco material, from approximately 1 percent to approximately 5 percent of a binder, and from approximately 5 percent to approximately 30 percent of an aerosol former, on a dry weight basis. The aerosol-generating substrate may include a crinkled sheet of homogenized tobacco material that is preferably curled. The aerosol generating substrate may include a metallic induction heating element. The aerosol generating substrate may include a plurality of metallic induction heating elements. The aerosol generating substrate can be configured to heat the aerosol generating substrate directly without transmitting heat to the aerosol generating substrate through at least one layer of paper. Advantageously, aerosol-generating substrate elements that include a single turn of thick paper layer can provide a visually and mechanically stable aerosol-generating substrate element, particularly for non-combustible heated aerosol-generating substrates containing a high level of liquids or aerosol formers. As a result, swelling, visible staining, and physical weakening of the wrapping portion of the aerosol-generating article can be reduced, even when a high level of wetting agent is included in the aerosol-generating substrate. ncfronn / zznz / E / YiAi Advantageously, aerosol-generating substrate elements that include a single turn of thick paper layer can be formed on the conventional substrate element forming equipment. This can improve the processability of the aerosol-generating substrate elements and reduce manufacturing costs. Advantageously, aerosol-generating substrate elements that include a single turn of thick paper layer can increase the amount of aerosol-generating substrate that is heated and consumed evenly, thereby reducing unused or wasted aerosol-generating substrate material. Advantageously, aerosol generating substrate elements that include a single wrap of thick paper layer can utilize internal heating of the aerosol generating substrate through induction or resistive heating elements embedded or inserted into the aerosol generating substrate, and the thick paper wrapping the aerosol generating substrate may not adversely affect the heating of the non-combustion heated aerosol generating substrate. A conventional cigarette is lit when a user applies a flame to one end and draws air through the other. The localized heat from the flame and the oxygen in the air drawn through the cigarette ignites the end, and the resulting combustion produces inhalable smoke. In contrast, heated aerosol-generating articles generate an aerosol by heating a flavor-forming substrate, such as tobacco. Known heated aerosol-generating articles include, for example, electrically heated aerosol-generating articles and aerosol-generating articles in which an aerosol is generated by transferring heat from a fuel element or heat source to a physically separated aerosol-forming substrate.For example, aerosol generating articles according to the description find particular application in aerosol generating systems ncfrQnn / zznz / E / YiAi comprising an electrically heated aerosol generating device having an internal heating blade adapted for insertion into the rod of the aerosol generating substrate. Aerosol generating articles of this type are described in the prior art, for example, in EP 0822670. As used in the present description, the term “aerosol generating device” refers to a device comprising a heating element that interacts with the aerosol generating substrate of the aerosol generating article to generate an aerosol. As used in the present description, the expression “aerosol generating system” refers to a combination of an aerosol generating device and an aerosol generating article. As used in the present description, the term aerosol generating article refers to an article that includes an aerosol generating substrate that is heated to produce and deliver an inhalable aerosol to a consumer. The term “aerosol generating substrate element” is used in this description to denote an aerosol generating substrate wrapped with a paper layer to form a portion of an aerosol generating article. The term “aerosol-generating substrate” refers to a substance capable of generating or releasing an aerosol. The aerosol-generating substrate may be a solid, paste, gel, suspension, liquid, or comprise any combination of solid, paste, gel, suspension, and liquid compounds. Preferably, the aerosol-generating substrate is a solid or gel composition. The aerosol-generating substrate may preferably include nicotine. ncfrQnn / zznz / E / YiAi The term “nozzle” is used in this description to refer to the portion of the aerosol-generating article designed to come into contact with the consumer’s mouth. The nozzle may be the portion of the aerosol-generating article that includes a filter, or in some cases, the nozzle may be defined by the extent of the nozzle wrap. The terms “upstream” and “downstream” refer to the relative positions of elements of the described aerosol-generating article in relation to the aerosol direction when drawn from an aerosol-generating substrate and through the nozzle. The aerosol-generating substrate elements of the present invention include an aerosol-generating substrate wrapped with a single turn of a thick paper layer. The aerosol-generating substrate element includes an aerosol-generating substrate and at least one paper layer surrounding the aerosol-generating substrate. Preferably, the single turn of the thick paper layer does not extend beyond the ends of the aerosol-generating substrate. The paper layer has a thickness in the range of approximately 78 micrometers to approximately 160 micrometers. Preferably, the paper layer has a thickness in the range of approximately 78 micrometers to approximately 140 micrometers, or approximately 100 micrometers to approximately 140 micrometers, or approximately 125 micrometers to approximately 140 micrometers. The paper layer may not extend beyond the edges of the aerosol-generating substrate. Preferably, the paper layer has a thickness in the range of approximately 90 micrometers to approximately 140 micrometers, or from approximately 110 micrometers to approximately 140 micrometers, or from approximately 130 micrometers to approximately 140 micrometers. The paper layer may not extend beyond the ends of the aerosol-generating substrate. Conventionally wrapped tobacco substrates may have a paper thickness in the range of approximately 20 micrometers to approximately 25 micrometers. Preferably, at least approximately 80%, or at least approximately 90%, or at least approximately 95% of the circumference of the aerosol-generating substrate may be enclosed by fewer than two layers of paper. Preferably, these fewer than two layers of paper do not extend beyond a certain length of the aerosol-generating substrate. Preferably, the fewer than two layers of paper do not extend beyond the ends of the aerosol-generating substrate. Preferably, at least approximately 80%, or at least approximately 90%, or at least approximately 95% of the circumference of the aerosol-generating substrate is enclosed by fewer than two layers of paper that surround the aerosol-generating substrate along essentially one length of the aerosol-generating substrate. The paper layer covers the entire circumference of the aerosol-generating substrate with very little overlap. Any overlapping area would create more than one paper layer, such as two layers. The overlap can be approximately 20% or less of the circumference of the aerosol-generating substrate. The overlap can be approximately 10% or less of the circumference of the aerosol-generating substrate. The overlap can be approximately 5% or less of the circumference of the aerosol-generating substrate. Reducing paper overlap can help avoid or minimize voids or air pockets defined as ncfrQnn / zznz / E / YiAi between paper layers in an overlap region. The paper layer may not extend beyond the ends of the aerosol-generating substrate. Preferably, the paper layer circumscribes an entire length of the aerosol-generating substrate between the ends of the aerosol-generating substrate. Preferably, the paper layer circumscribes an entire length of the aerosol-generating substrate between the ends of the aerosol-generating substrate and does not extend beyond one or both ends of the aerosol-generating substrate. The paper layer can enclose the aerosol-generating substrate to define the aerosol-generating substrate element with an essentially cylindrical shape. The aerosol-generating substrate can define an essentially cylindrical shape having a diameter in the range of approximately 6.8 mm to approximately 7.1 mm. The aerosol-generating substrate element can define an essentially cylindrical shape having a diameter in the range of approximately 7.1 mm to approximately 7.3 mm. The paper layer may enclose the aerosol-generating substrate to define the aerosol-generating substrate element with an essentially cylindrical shape. The aerosol-generating substrate may define an essentially cylindrical shape having a diameter in the range of approximately 6.8 mm to approximately 7.0 mm. The aerosol-generating substrate element may define an essentially cylindrical shape having a diameter in the range of approximately 7.15 mm to approximately 7.25 mm. The at least one layer of paper may have a paper thickness to tobacco substrate diameter ratio in the range of approximately 1:120 to approximately 1:40, or approximately 1:100 to approximately 1:50, or approximately 1:70 to approximately 1:50, or approximately 1:60 to approximately 1:50. Conventionally wrapped tobacco substrates may have a paper thickness to tobacco substrate diameter ratio of approximately 1:300. The at least one layer of paper may have a paper thickness to tobacco substrate element diameter ratio in the range of approximately 1:100 to approximately 1:40, or approximately 1:75 to approximately 1:50, or approximately 1:65 to approximately 1:50, or approximately 1:60 to approximately 1:50. Conventionally wrapped tobacco substrates may have a paper thickness to tobacco substrate element diameter ratio of approximately 1:300. The aerosol-generating substrate element preferably includes an aerosol-generating substrate having a diameter in the range of approximately 6.8 mm to approximately 7.1 mm and a single layer of paper having a thickness in the range of approximately 78 micrometers to 140 micrometers that encloses the aerosol-generating substrate, and at least 80%, or at least 90%, of the circumference of the aerosol-generating substrate is enclosed by fewer than two layers of paper. Preferably, this single layer of thick paper does not extend beyond the ends of the aerosol-generating substrate. Preferably, this single layer of paper encloses an entire length of the aerosol-generating substrate. The aerosol-generating substrate element preferably includes an aerosol-generating substrate having a diameter in the range of approximately 6.8 mm to approximately 7.1 mm and a single paper layer having a thickness in the range of approximately 100 micrometers to 140 micrometers that circumscribes the aerosol-generating substrate, and less than 20%, or less than 10%, of the circumference of the aerosol-generating substrate is circumscribed by overlapping paper layers. Preferably, this single paper layer does not extend beyond the ends of the aerosol-generating substrate. Preferably, this single paper layer circumscribes an entire length of the aerosol-generating substrate. The aerosol-generating substrate element preferably includes an aerosol-generating substrate element having a diameter in the range of approximately 7.15 mm to approximately 7.25 mm and a single layer of paper having a thickness in the range of approximately 100 micrometers to 140 micrometers that encloses the aerosol-generating substrate, and less than 20%, or less than 10%, of the circumference of the aerosol-generating substrate is enclosed by overlapping paper layers. Preferably, this single layer of thick paper does not extend beyond the ends of the aerosol-generating substrate. Preferably, this single layer of paper encloses an entire length of the aerosol-generating substrate. The aerosol-generating substrate element preferably includes an aerosol-generating substrate having a diameter and a single paper layer having a thickness that circumscribes the aerosol-generating substrate and at least 80%, or at least 90%, of the circumference of the aerosol-generating substrate is circumscribed by fewer than two paper layers. Preferably, this single layer of thick paper does not extend beyond the ends of the aerosol-generating substrate. Preferably, this single layer of paper encloses the entire length of the aerosol-generating substrate. Preferably, the ratio of paper thickness to tobacco substrate diameter is in the range of approximately 1:120 to approximately 1:40, or approximately 1:100 to approximately 1:50. Preferably, the at least one layer of paper may have a paper thickness to tobacco substrate element diameter ratio in the range of approximately 1:100 to approximately 1:40, or approximately 1:75 to approximately 1:50, or approximately 1:65 to approximately 1:50, or approximately ncfronn / zznz / E / YiAi 1:60 to approximately 1:50. An aerosol-generating article may comprise an aerosol-generating substrate element and a nozzle. The nozzle may comprise a filter. A tip wrap may attach the filter to the aerosol-generating substrate element. One or more intermediate sections may separate the aerosol-generating substrate and a nozzle. The tip wrap may overlap the aerosol-generating substrate element by 25% or less. An aerosol-generating substrate may be a solid composition. This composition may include plant-based material. The aerosol-generating substrate may include tobacco, and preferably the tobacco contains volatile tobacco-flavored compounds that are released from the aerosol-generating substrate upon heating. The aerosol-generating substrate may comprise homogenized tobacco material, an aerosol former, and a binder. Nicotine may be present in the aerosol-generating substrate in a range of approximately 0.5 to approximately 10% by weight, or approximately 0.5 to approximately 5% by weight. Preferably, the aerosol-generating substrate may include approximately 1 to approximately 3% by weight, or approximately 1.5 to approximately 2.5% by weight, or approximately 2% by weight. The aerosol-generating substrate may comprise any suitable type or types of tobacco or tobacco substitute material, in any suitable form. The aerosol-generating substrate may include artificial atmosphere cured tobacco, Burley tobacco, Maryland tobacco, Oriental tobacco, specialty tobacco, homogenized or reconstituted tobacco, or any combination thereof. The aerosol-generating substrate may be provided in the form of tobacco chips, tobacco foil, processed tobacco materials such as volume-expanded or inflated tobacco, processed tobacco stems such as rolled cut stems or inflated cut stems, homogenized tobacco, reconstituted tobacco, molded leaf tobacco, or mixtures thereof, and the like. The term “tobacco chips” is used herein to indicate a tobacco material formed predominantly from the foil portion of the tobacco leaf.The term “tobacco cut” is used in this description to refer to either a single species of Nicotiana or two or more species of Nicotiana that form a tobacco cut mixture. As used in this description, the term “homogenized tobacco” denotes a material formed by agglomerating particulate tobacco. Homogenized tobacco may include reconstituted tobacco or molded-leaf tobacco, or a mixture of both. The term “reconstituted tobacco” refers to a paper-like material that can be manufactured from tobacco by-products, such as very short tobacco fibers, tobacco dust, tobacco stalks, or a mixture thereof. Reconstituted tobacco can be manufactured by extracting soluble chemicals from tobacco by-products, processing the remaining tobacco fibers into a sheet, and then reapplying the extracted materials in concentrated form to the sheet.The term “molded leaf tobacco” is used herein to refer to a product resulting from a process well known in the art, which involves pouring a suspension comprising ground tobacco particles and a binder (e.g., guar gum) onto a support surface, such as a conveyor belt, drying the suspension, and removing the dried sheet from the support surface. Illustrative methods for producing these types of aerosol-generating substrates are described in U.S. Patents 5,724,998; 5,584,306; 4,341,228; 5,584,306; and 6,216,706. The homogenized tobacco may be formed into a sheet that is curled, twisted, folded, or otherwise compressed before being wound into a bar.For example, sheets of homogenized tobacco material for use in the invention can be curled using a curling unit of the type described in CHA-691156, comprising a pair of rotating curling rollers. However, it will be appreciated that sheets of homogenized tobacco material for use in the invention can be textured using other suitable machinery and processes that deform or perforate the sheets of homogenized tobacco material. The aerosol-generating substrate used in aerosol-generating articles generally includes a higher level of aerosol formers than burned smoking articles, such as cigarettes. Humectants may also be referred to as an “aerosol former.” An aerosol former is used to describe any suitable known compound or mixture of compounds that, during use, facilitates aerosol formation and is essentially resistant to thermal degradation at the operating temperature of the aerosol-generating substrate.Suitable aerosol formers are known in the art and include, but are not limited to: polyhydric alcohols, such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerin; esters of polyhydric alcohols, such as glycerin monoacetate, dicetate, or triacetate; and aliphatic esters of monocarboxylic, dicarboxylic, or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyhydric alcohols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol, and, most preferably, glycerin. The aerosol-generating substrate may comprise a single aerosol former. Alternatively, the aerosol generating substrate may comprise a combination of two or more aerosol formers. The aerosol-generating substrate may have a high level of aerosol former. As used herein, a high level of aerosol former means an aerosol former content that is greater than approximately 10%, or preferably greater than approximately 15%, or more preferably greater than approximately 20%, by weight. ncfrQnn / zznz / E / YiAi The aerosol-generating substrate may also have an aerosol former content of between approximately 10% and approximately 30%, approximately 15% and approximately 30%, or approximately 20% and approximately 30% by weight. The aerosol-generating substrate preferably has a glycerin content of between approximately 10% and approximately 30%, approximately 15% and approximately 30%, or approximately 20% and approximately 30% by weight. The aerosol-generating substrate may comprise at least approximately 1%, or at least approximately 2%, or at least approximately 5%, or at least approximately 7%, or at least approximately 10%, or at least approximately 12%, or at least approximately 15%, or at least approximately 18% aerosol former, by weight. The aerosol-generating substrate may comprise an aerosol former in the range of approximately 1% to approximately 20%, or approximately 5% to approximately 20%, or approximately 10% to approximately 20%, by weight. The aerosol-generating substrate may comprise at least approximately 1%, or at least approximately 2%, or at least approximately 5%, or at least approximately 7%, or at least approximately 10%, or at least approximately 12%, or at least approximately 15%, or at least approximately 18% glycerin, by weight. The aerosol-generating substrate may comprise glycerin in a range of approximately 1% to approximately 20%, or approximately 5% to approximately 20%, or approximately 10% to approximately 20%, by weight. Preferably, the aerosol-generating article should generally be cylindrical. This allows for a smooth flow of the aerosol. The aerosol-generating article may have an external diameter, for example, between 7.1 mm and 7.3 mm, or between approximately 7.15 mm and approximately 7.25 mm. The aerosol-generating article may have a length, for example, between 10 mm and 60 mm, between 15 mm and 50 mm, or between 20 mm and 45 mm. The aerosol-generating substrate may include a flavoring. Botanical materials provide a flavoring that can impart a taste to the aerosol generated by the aerosol-generating item. A flavoring is any natural or artificial compound that affects the organoleptic quality of the aerosol. Non-limiting examples of flavoring sources include mints such as spearmint and peppermint, coffee, tea, cinnamon, clove, cocoa, vanilla, eucalyptus, geranium, agave, and juniper; and combinations thereof. The aerosol-generating substrate may include an essential oil. Essential oils can provide a flavoring that imparts a taste to the aerosol generated by the aerosol-generating device. Suitable essential oils include, but are not limited to, eugenol, peppermint oil, and spearmint oil. A preferred essential oil is eugenol. The essential oil may be present in the aerosol-generating substrate in an amount of at least approximately 0.1% by weight, or at least approximately 0.5% by weight, or at least approximately 1% by weight. The essential oil may be present in the aerosol-generating substrate in a range of approximately 0.1% by weight to approximately 10% by weight, or from approximately 0.1% by weight to approximately 5% by weight, or from approximately 0.5% by weight to approximately 2%. The aerosol-generating substrate may include homogenized tobacco material. The homogenized tobacco material may include tobacco material, from approximately 1 percent to approximately 5 percent of a binder, and from approximately 5 percent to approximately 30 percent of an aerosol former, on a dry weight basis. The homogenized tobacco sheets for use in the aerosol-generating article of the present invention may be manufactured by methods known in the art, for example, the methods described in International Patent Application WO-A-201 2 / 1 64009 A2. In a preferred embodiment, the homogenized tobacco sheets for use in the aerosol-generating article are formed from a suspension comprising particulate tobacco, guar gum, cellulose fibers, and glycerin by a casting process. The aerosol-generating substrate may include a crinkled sheet of homogenized tobacco material that is preferably crimped. As used herein, the term “crimped” denotes a sheet having a plurality of essentially parallel ridges or corrugations. Preferably, when the aerosol-generating article has been assembled, the essentially parallel ridges or corrugations extend along or are parallel to the longitudinal axis of the aerosol-generating article. An aerosol generating system may comprise: a heat source; an aerosol generating substrate; at least one air inlet downstream of the aerosol generating substrate; and an airflow path extending between the at least one air inlet and the mouth end of the article. The heat source may be integrated with an aerosol generating device, and a consumable aerosol generating article may be releasably received within the aerosol generating device. The heat source can be a combustible heat source, a chemical heat source, an electrical heat source, a heat sink, or any combination thereof. The heat source can be an electrical heat source, preferably in the form of a blade that can be inserted into the aerosol-generating substrate. Alternatively, the heat source can be configured to surround the aerosol-generating substrate, and as such, it can be in the form of a hollow cylinder or any other suitable shape. Preferably, the heat source is configured to heat the aerosol generating substrate directly without transmitting heat to the aerosol generating substrate through at least one layer of paper. The aerosol-generating substrate may include one or more induction heating elements or susceptors. Induction heating elements or susceptors are heated in the presence of an alternating or fluctuating electromagnetic field. When heating is by induction, a fluctuating electromagnetic field is transmitted through the aerosol-generating article to the induction heating element or susceptor, causing the susceptor or induced heating element to convert the fluctuating field into thermal energy, thereby heating the aerosol-generating substrate. The induction heating element or susceptor can be formed from any material that can be inductively heated to a temperature sufficient to generate an aerosol from the aerosol-generating substrate. The induction heating element or susceptor can comprise a metal or carbon. A preferred induction heating element or susceptor can comprise a ferromagnetic material, for example, ferritic iron, or a ferromagnetic steel or stainless steel. The induction heating element or susceptor can comprise aluminum. The induction heating element or susceptor can be formed from 400 series stainless steels, for example, grade 410, grade 420, or grade 430 stainless steel. Different materials will dissipate different amounts of energy when placed within electromagnetic fields that have similar frequency and field strength values.Preferably, the induction heating element or susceptors are heated to a temperature above 250 degrees Celsius. However, preferably the induction heating element or susceptors are heated to less than 350 degrees Celsius to prevent burning the material in contact with the susceptor. The aerosol-generating substrate may comprise a metallic induction heating element. The metallic induction heating element may comprise multiple metallic induction heating elements. The metallic induction heating element may comprise a metallic induction heating ring element. This paper layer may exhibit a permeability range that includes being non-permeable. The permeability of cigarette paper is determined using the international standard test method ISO 2965:2009, and the result is presented as cubic centimeters per minute per square centimeter and is referred to as “CORESTA units.” The permeability of the wrapper described herein may range from approximately 1 to approximately 10 CORESTA units, from approximately 5 to approximately 20 CORESTA units, or from approximately 1 to approximately 5 CORESTA units. The paper layer can be made of any cellulosic material such as paper, wood, textiles, natural and artificial fibers. ncfrQnn / zznz / E / YiAi The paper layer may comprise a laminate of a paper layer and a metal layer. The paper layer may comprise a laminate of one layer of paper and one layer of aluminum. The laminate of one layer of paper and one layer of aluminum may have a uniform thickness in the range of approximately 78 micrometers to approximately 160 micrometers, or from approximately 78 micrometers to approximately 140 micrometers, or from approximately 100 micrometers to approximately 140 micrometers, or from approximately 125 micrometers to approximately 140 micrometers. The laminate of one layer of paper and one layer of metal may not extend beyond the edges of the aerosol-generating substrate. The pull-out resistance (RTD) of the aerosol generating article after insertion into the aerosol generating device is preferably between approximately 80 mm WG and approximately 140 mm WG, with greater preference between approximately 100 mm WG and approximately 120 mm WG. As used in this description, pull-out resistance is expressed in pressure units 'mm WG' or 'mm of water column' and is measured in accordance with ISO 6565:2002. The pull-out resistance (RTD) of the aerosol-generating substrate bar is preferably between approximately 50 mm WG and approximately 80 mm WG. Preferably, the RTD of the aerosol-generating substrate bar is between approximately 5 mm WG and approximately 8 mm WG per millimeter of bar length. All scientific and technical terms used in this description have meanings commonly used in the field unless otherwise specified. The definitions provided in this description are intended to facilitate understanding of certain terms frequently used herein. ncfronn / zznz / E / YiAi As used in this description and the accompanying claims, the singular forms “a”, “an”, and “the” encompass examples that have plural referents, unless the content clearly indicates otherwise. As used in this description and accompanying claims, the term “or” is generally used in a sense that includes “and / or” unless the content clearly indicates otherwise. As used in this description, “has,” “which has,” “includes,” “which includes,” “comprises,” “which comprises,” or similar expressions are used in their broadest sense and generally mean “which includes, but is not limited to.” The expressions “which essentially consists of,” “consists of,” and similar expressions are understood to be included within “which comprises” and similar expressions. The words “preferred” and “preferably” refer to examples of the invention that may achieve certain benefits under certain circumstances. However, other examples may also be preferred under the same or other circumstances. Furthermore, the enumeration of one or more preferred examples does not imply that other examples are not useful, and it is not intended to exclude other examples from the scope of the description, which includes the claims. Figure 1 is a schematic cross-section diagram of an aerosol generating article. Figure 2 is a schematic cross-section diagram of the aerosol-generating substrate element along line 2-2 in Figure 1. Figure 3 is a schematic cross-section diagram of the aerosol-generating substrate element along line 3-3 in Figure 2. ncfrQnn / zznz / E / YiAi Figure 4 is a schematic cross-section diagram of an aerosol generating system. Figure 5 is a schematic cross-section diagram of a heating blade inserted into the aerosol generating substrate element. The aerosol-generating articles depicted in Figures 1-5 illustrate one or more examples of aerosol-generating articles, components of aerosol-generating articles, or aerosol-generating systems described above. The schematic drawings are not necessarily to scale and are presented for illustrative purposes only and are not intended to be limiting. The figures represent one or more aspects described herein. However, it is understood that other aspects not depicted in the figures fall within the scope and spirit of this description. The aerosol-generating article 10, in Figure 1, illustrates an aerosol-generating substrate element 12 comprising an aerosol-generating substrate 20 wrapped with a single turn of a heavy paper layer 30. An intermediate section 24 separates a filter element 22 from the aerosol-generating substrate element 12. The aerosol-generating substrate element 12, the intermediate section 24, and a filter element 22 are aligned from a distal end 13 to a proximal end 11 in serial order and form a cylinder. A tip paper or tip wrap 40 circumscribes the aerosol-generating article 10 to join the aerosol-generating substrate element 12 to the intermediate section 24, and a filter element 22. The intermediate section 24 may comprise one or more hollow cellulose acetate tubes or polylactic acid filter segments. The filter element 22 may define a nozzle segment and be formed from cellulose acetate material. The aerosol-generating substrate element 12, the intermediate section 24, and a filter element 22 may each be individually wrapped with a paper layer and then joined together with tip paper or tip wrap 40. In particular, the aerosol-generating substrate element 12 is wrapped with a paper layer 30, as described herein. The aerosol generating article 10 has a mouth end or proximal end 11 and an upstream distal end 13, located at the opposite end of the article from the mouth end 11. The aerosol generating article 10 shown in Figure 1 is particularly suitable for use with an electrically operated aerosol generating device comprising a heater for heating the aerosol generating substrate element 12. Figure 2 is a schematic cross-sectional diagram of the aerosol-generating substrate element 12 along line 2-2 in Figure 1. Figure 3 is a schematic cross-sectional diagram of the aerosol-generating substrate element 12 along line 3-3 in Figure 2. The paper layer 30 encloses the aerosol-generating substrate 20 to define the aerosol-generating substrate element 12 with an essentially cylindrical shape. The aerosol-generating substrate 20 defines an essentially cylindrical shape having a diameter 23 in the range of approximately 6.8 mm to approximately 7.1 mm. The aerosol-generating substrate element 12 defines an essentially cylindrical shape having a diameter 33 in the range of approximately 7.1 mm to approximately 7.3 mm. The paper layer 30 has a thickness T in the range of approximately 78 micrometers to approximately 160 micrometers. The paper layer 30 may preferably have a thickness in the range of approximately 78 micrometers to approximately 140 micrometers, or from approximately 90 micrometers to approximately 140 micrometers, or from approximately 100 micrometers to approximately 140 micrometers, or from approximately 110 micrometers to approximately 140 micrometers, or from approximately 125 micrometers to approximately 140 micrometers, or from approximately 130 micrometers to approximately 140 micrometers. The paper layer 30 has a paper thickness ratio T to the tobacco substrate diameter 23 in the range of approximately 1:120 to approximately 1:40, or approximately 1:100 to approximately 1:50. The paper layer 30 may have a paper thickness ratio to the tobacco substrate element diameter 33 in the range of approximately 1:100 to approximately 1:40, or approximately 1:75 to approximately 1:50, or approximately 1:65 to approximately 1:50, or approximately 1:60 to approximately 1:50. The paper layer 30 does not extend beyond either end 25, 26 of the aerosol-generating substrate 20. The paper layer 30 circumscribes the entire circumference of the aerosol-generating substrate 20 with very little overlap 100 of the paper layer 30 upon itself. The overlapping region 100 forms more than one paper layer. In Figure 2, the overlap 100 forms two paper layers. The overlap 100 may be approximately 20% or less of the circumference of the aerosol generating substrate 20. The overlap 100 may be approximately 10% or less of the circumference of the aerosol generating substrate 20. The overlap 100 may be approximately 5% or less of the circumference of the aerosol generating substrate 20. The paper layer 30 may not extend beyond the ends 25, 26 of the aerosol generating substrate 20. The paper layer 30 circumscribes an entire length of the aerosol generating substrate 20 between the ends 25, 26 of the aerosol generating substrate 20. Figure 2 illustrates that the paper layer 30 essentially forms a single turn or a single layer around the circumference of the aerosol-generating substrate 20. At least approximately 80%, or at least approximately 90%, or at least approximately 95% of the circumference of the aerosol-generating substrate 20 is circumscribed by fewer than two layers of paper 30. At least approximately 80%, or at least approximately 90%, or at least approximately 95% of the circumference of the aerosol-generating substrate 20 is circumscribed by fewer than two layers of paper 30 that do not extend beyond a length or the ends 25, 26 of the aerosol-generating substrate 20.At least approximately 80%, or at least approximately 90%, or at least approximately 95% of the circumference of the aerosol generating substrate 20 is circumscribed by less than two layers of paper 30 that circumscribe the aerosol generating substrate 20 along essentially a length of the aerosol generating substrate 20. Figure 4 is a schematic cross-sectional diagram of an aerosol generating system 201. Figure 5 is a schematic cross-sectional diagram of a heating blade 230 inserted into the aerosol generating substrate element 12. The aerosol generating article 10 can be used with the aerosol generating device 200 as illustrated in Figure 4 and Figure 5. The aerosol generating device 200 includes a housing 210 that defines the receptacle 220, which is configured to receive the aerosol generating article 10. The aerosol generating device 200 also includes a heating blade element 230 configured to pierce the aerosol generating substrate element 12 of the aerosol generating article 10. The heating blade element 230 may comprise an electrically resistive heating component. In addition, the device 200 includes a power supply 240 and electronic control circuits 250 that cooperate to control the heating of the heating blade element 230. The aerosol-generating article 10 comprises an aerosol-generating substrate element 12, an intermediate section 24, and a filter element 22 aligned from a distal end 13 to a proximal end 11 in serial order and forming a cylinder. The distal end 13 of the aerosol-generating article 10 is approximately 12 millimeters long. The aerosol-generating substrate 12 is cylindrical in shape and has an essentially circular cross-section. The aerosol-generating substrate 12 may comprise a crinkled sheet of homogenized tobacco material. The sheet of homogenized tobacco material may comprise approximately 10 percent by weight on a dry basis of glycerin. The intermediate section 24 may be a hollow cellulose acetate tube having a length of approximately 8 millimeters and a thickness of 1 millimeter.The nozzle segment or filter element 22 may comprise an 8 denier cellulose acetate tow plug per filament and has a length of approximately 7 millimeters. Figure 5 illustrates the heating blade element 230 arranged within the aerosol generating substrate 12. The heating blade element 230 can heat the aerosol generating substrate 12 of the aerosol generating article 10. Heating the aerosol generating substrate 12 causes the aerosol generating substrate 12 to generate an aerosol containing nicotine that can be transferred out of the aerosol generating article 10 at the proximal end 11. The heating blade element 230 can have a width 233 of approximately 5 mm. The aerosol generating substrate 20 defines an essentially cylindrical shape having a diameter 23 in the range of approximately 6.8 mm to approximately 7.1 mm. The aerosol generating substrate element 12 defines an essentially cylindrical shape having a diameter 33 in the range of approximately 7.1 mm to approximately 7.3 mm. The heating blade element 230 can be at a distance of approximately 1 mm from the paper layer 30. In some examples the heating mechanism may be by induction, where the heating element emits radiomagnetic radiation that is absorbed by one or more metallic induction heating elements when the aerosol generating article 10 is positioned in the receptacle 220 of the aerosol generating device 200. Once the aerosol-generating article 10 is releasably received into the aerosol-generating device 200 and over the heating blade element 230, the aerosol-generating device 200 is actuated to heat the aerosol-generating substrate 12 to a temperature of approximately 375 degrees Celsius. When a user draws at the mouth end 11 of the aerosol-generating article 10, the volatile compounds released from the aerosol-generating substrate 12 are drawn downstream through the aerosol-generating article 10 and condense to form an aerosol that is drawn through the nozzle 11 of the aerosol-generating article 10 into the user's mouth. The illustrative examples described above are not exhaustive. Other examples consistent with the illustrative examples described above will be evident to those skilled in the technique.
Claims
1. An aerosol-generating substrate element comprising: an aerosol-generating substrate comprising homogenized tobacco material and a glycerin content of between approximately 10% and approximately 30%; and a paper layer circumscribing the aerosol-generating substrate, the paper layer having a thickness in the range of approximately 78 micrometers to approximately 160 micrometers, wherein at least approximately 80% of the circumference of the aerosol-generating substrate is circumscribed by fewer than two paper layers, wherein the at least one paper layer has a paper thickness ratio to the tobacco substrate diameter in the range of approximately 1:120 to approximately 1:40, or approximately 1:100 to approximately 1:50, or approximately 1:70 to approximately 1:50, or approximately 1:60 to approximately 1:
50.
2. The aerosol-generating substrate element according to claim 1, wherein the paper layer has a paper thickness in the range of approximately 78 micrometers to approximately 140 micrometers, or approximately 90 micrometers to approximately 140 micrometers, or approximately 100 micrometers to approximately 140 micrometers, or approximately 110 micrometers to approximately 140 micrometers, or approximately 125 micrometers to approximately 140 micrometers, or approximately 130 micrometers to approximately 140 micrometers.
3. The aerosol generating substrate element according to any of the preceding claims, wherein the paper layer does not extend beyond the ends of the aerosol generating substrate.
4. The aerosol generating substrate element according to any of the preceding claims, wherein at least approximately 90%, or at least approximately 95%, of the circumference of the aerosol generating substrate is enclosed by less than two layers of paper.
5. The aerosol generating substrate element according to any preceding claim, wherein at least approximately 90%, or at least approximately 95%, of the circumference of the aerosol generating substrate is circumscribed by fewer than two layers of paper that do not extend beyond a length of the aerosol generating substrate.
6. The aerosol generating substrate element according to any preceding claim, wherein at least approximately 80%, or at least approximately 90%, or at least approximately 95% of the circumference of the aerosol generating substrate is circumscribed by fewer than two layers of paper that circumscribe the aerosol generating substrate along essentially a length of the aerosol generating substrate.
7. The aerosol generating substrate element according to any of the preceding claims, wherein the aerosol generating substrate defines an essentially cylindrical shape.
8. The aerosol generating substrate element according to any of the preceding claims, wherein the aerosol generating substrate defines an essentially cylindrical shape having a diameter in the range of approximately 6.8 mm to approximately 7.1 mm, or from approximately 6.8 mm to approximately 7.0 mm.
9. The aerosol-generating substrate element according to claim 8, wherein the homogenized tobacco material comprises tobacco material, from approximately 1 percent to approximately 5 percent of a binder, and from approximately 10 percent to approximately 30 percent of glycerin, on a dry weight basis.
10. The aerosol generating substrate element according to claim 8 or 9, wherein the aerosol generating substrate comprises a crinkled sheet of homogenized tobacco material that is preferably curled.
11. The aerosol-generating substrate element according to any preceding claim, wherein the aerosol-generating substrate comprises a metallic induction heating element. 5 12. The aerosol generating substrate element according to any of the preceding claims, wherein the aerosol generating substrate comprises a plurality of metallic induction heating elements.
13. The aerosol generating substrate element according to any preceding claim, wherein the aerosol generating substrate element is configured 10 to heat the aerosol generating substrate directly without transmitting heat to the aerosol generating substrate through at least one paper layer.
14. The aerosol generating substrate element according to any of the preceding claims, wherein the paper layer forms a laminate with an aluminum layer.
15. The aerosol generating substrate element according to any 15 preceding claim, wherein the aerosol generating substrate element is configured to receive a resistive heating blade inserted into the aerosol generating substrate.