An aerosol-forming substrate

Abstract

The invention provides an aerosol-forming substrate. An aerosol-forming substrate (1020) for use in an aerosol-generating system (2000) is provided. The aerosol-forming substrate (1020) comprises: one or more aerosol-forming agents; hydroxypropyl methyl cellulose; and one or more cellulose-based fortifiers. The aerosol-forming substrate (1020) has an aerosol former content of greater than 30% by weight. The one or more cellulose-based fortifiers include a cellulose powder. The aerosol-forming substrate (1020) has a cellulose powder content of between about 0.5 wt% and about 50 wt%.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202511485599.7 (22) Application Date 2021.10.07 (30) Priority Data 20200643.3 2020.10.07 EP (62) Divisional Application Data 202180067167.8 2021.10.07 (71) Applicant Philip Morris Manufacturing Company Address Switzerland (72) Inventors C. Gombs JY. Vollmer (74) Patent Agency China Council for the Promotion of International Trade Patent & Trademark Office Co., Ltd. 11038 Patent Attorney Liu Qiang (51) Int.Cl. A24B 15 / 167 (2020.01) (54) Invention Title Aerosol Forming Matrix (57) Abstract This invention provides an aerosol forming matrix. An aerosol forming matrix (1020) is provided for use in an aerosol generation system (2000). The aerosol forming matrix (1020) comprises: one or more aerosol forming agents; hydroxypropyl methylcellulose; and one or more cellulose-based fortifying agents. The aerosol forming matrix (1020) has an aerosol forming agent content of greater than 30% by weight. The one or more cellulose-based fortifying agents comprise cellulose powder. The aerosol forming matrix (1020) has a cellulose powder content between about 0.5% by weight and about 50% by weight. Claims 1 page, Description 19 pages, Drawings 1 page, CN 121286757 A 2026.01.09 CN 1 21 28 67 57 A 1. An aerosol forming matrix for an aerosol generation system, the aerosol forming matrix comprising: one or more aerosol forming agents, wherein the aerosol forming matrix has an aerosol forming agent content of greater than 30% by weight; hydroxypropyl methylcellulose; one or more cellulose-based reinforcing agents, and carboxymethyl cellulose. 2. The aerosol forming matrix according to claim 1, wherein the aerosol forming matrix has a hydroxypropyl methylcellulose content of about 0.5% by weight to about 50% by weight. 3. The aerosol forming matrix according to any preceding claim, wherein the aerosol forming matrix has a cellulose-based reinforcing agent content of greater than about 0.5% by weight. 4. The aerosol forming matrix according to claim 3, wherein the aerosol forming matrix has a cellulose-based reinforcing agent content of about 0.5% by weight to about 50% by weight. 5. The aerosol forming matrix of claim 4, wherein the aerosol forming matrix has a cellulose-based reinforcing agent content of about 0.5% by weight to about 40% by weight. 6. The aerosol forming matrix of any preceding claim, wherein the one or more cellulose-based reinforcing agents comprise cellulose fibers.7. The aerosol forming matrix of claim 6, wherein the aerosol forming matrix has a cellulose fiber content of about 0.5% by weight to about 50% by weight. 8. The aerosol forming matrix of any preceding claim, wherein the one or more cellulose-based reinforcing agents comprise microcrystalline cellulose. 9. The aerosol forming matrix of claim 8, wherein the aerosol forming matrix has a microcrystalline cellulose content of about 0.5% by weight to about 50% by weight. 10. The aerosol forming matrix of any preceding claim, wherein the one or more cellulose-based reinforcing agents comprise cellulose powder. 11. The aerosol forming matrix of claim 10, wherein the aerosol forming matrix has a cellulose powder content of about 0.5% by weight to about 50% by weight. 12. The aerosol forming matrix of claim 1, wherein the aerosol forming matrix has a carboxymethyl cellulose content greater than about 0.5% by weight. 13. The aerosol forming matrix of claim 1, wherein the aerosol forming matrix has a carboxymethyl cellulose content of about 0.5% by weight to about 20% by weight. 14. The aerosol forming matrix according to any one of claims 1, 12, or 13, wherein the carboxymethyl cellulose comprises sodium carboxymethyl cellulose. 15. An aerosol generating article comprising the aerosol forming matrix according to any of the preceding claims. Claims 1 / 1 page 2 CN 121286757 A Aerosol Forming Matrix

[0001] This invention is a divisional application of Chinese Patent Application No. “202180067167.8”, filed on October 7, 2021, entitled “Aerosol Forming Matrix”.

[0002] The present invention relates to an aerosol forming matrix comprising hydroxypropyl methylcellulose and one or more cellulose-based fortifiers.

[0003] Aerosol generating systems for delivering aerosols to users typically include an atomizer configured to generate an inhalable aerosol from the aerosol forming matrix. Some known aerosol generating systems include thermal atomizers, such as electric heaters or induction heating devices. Thermal atomizers are configured to heat and vaporize an aerosol-forming matrix to generate an aerosol. A typical aerosol-forming matrix used in an aerosol generation system is a nicotine formulation, which may be a liquid nicotine formulation containing aerosol-forming agents such as glycerol and / or propylene glycol.

[0004] It is desirable to provide aerosol-generating articles having an aerosol-forming matrix exhibiting increased tensile strength.

[0005] It is also desirable to provide aerosol-generating articles having an aerosol-forming matrix that exhibits a reduced tendency to melt and form a crust on a portion of the aerosol-generating article or a portion of the aerosol-generating system.

[0006] An aerosol forming matrix is ​​provided for use in an aerosol generation system. The aerosol forming matrix may comprise one or more aerosol forming agents. The aerosol forming matrix may comprise hydroxypropyl methylcellulose. The aerosol forming matrix may comprise one or more cellulose-based reinforcing agents.

[0007] An aerosol forming matrix is ​​also provided for use in an aerosol generation system, the aerosol forming matrix comprising: one or more aerosol forming agents; hydroxypropyl methylcellulose; and one or more cellulose-based reinforcing agents.

[0008] An aerosol generating article is also provided for use in an aerosol generation system. The aerosol generating article may comprise an aerosol forming matrix. The aerosol forming matrix may comprise one or more aerosol forming agents. The aerosol forming matrix may comprise hydroxypropyl methylcellulose. The aerosol forming matrix may comprise one or more cellulose-based reinforcing agents.

[0009] An aerosol generating article is also provided, the aerosol generating article comprising: an aerosol forming matrix, the aerosol forming matrix comprising: one or more aerosol forming agents; hydroxypropyl methylcellulose; and one or more cellulose-based fortifiers.

[0010] An aerosol generating system is also provided, comprising: an aerosol generating apparatus; and an aerosol generating article. The aerosol generating article may include an aerosol forming matrix. The aerosol forming matrix may comprise one or more aerosol forming agents. The aerosol forming matrix may comprise hydroxypropyl methylcellulose. The aerosol forming matrix may comprise one or more cellulose-based fortifiers.

[0011] An aerosol generating system is also provided, the aerosol generating system comprising: an aerosol generating apparatus; and an aerosol generating article, the aerosol generating article comprising an aerosol forming matrix, the aerosol forming matrix comprising: one or more aerosol forming agents; hydroxypropyl methylcellulose; and one or more cellulose-based fortifiers.

[0012] As used herein, the term "aerosol generating article" refers to an article used to generate aerosols. Aerosol generating articles typically comprise an aerosol forming matrix suitable for and intended to be heated or burned to release volatile compounds that can form aerosols. Conventional smoking is ignited when a user applies a flame to one end of a cigarette and inhales air through the other end. The localized heat provided by the flame and oxygen in the air inhaled through the cigarette ignites the end of the cigarette, and the resulting combustion generates inhalable smoke. In contrast, in a "heated aerosol generating article," the aerosol is generated by heating the aerosol forming matrix rather than by burning the aerosol forming matrix. Known heated aerosol generating articles, such as those described in CN 121286757 A, include, for example, electrically heated aerosol generating articles.

[0013] As used herein, the term "aerosol forming matrix" refers to a matrix capable of generating volatile compounds upon heating, which can form aerosols. Aerosols generated from an aerosol forming matrix can be visible or invisible to the human eye and can contain vapors (e.g., fine particulate matter in a gaseous state, which are typically liquid or solid at room temperature) as well as droplets of gas and condensed vapors.

[0014] Aerosol forming matrices containing a combination of hydroxypropyl methylcellulose and cellulose-based reinforcing agents can have numerous advantages.

[0015] The inclusion of hydroxypropyl methylcellulose in an aerosol forming matrix can help improve the manufacturing process of the aerosol forming matrix. For example, hydroxypropyl methylcellulose can reduce the overall viscosity of the slurry mixed during the preparation of the aerosol forming matrix. Lower viscosity slurries may flow more easily than conventional slurries, and are easier to mix, transfer, and handle during the manufacturing process.

[0016] The inclusion of cellulose-based reinforcing agents in an aerosol forming matrix can increase the tensile strength of the aerosol forming matrix. For example, during transport or during the manufacturing process, aerosol forming matrices with high tensile strength are less likely to deteriorate or break.

[0017] Despite the above advantages, the inventors have found that aerosol forming matrices containing hydroxypropyl methylcellulose may have insufficient tensile strength. However, by using cellulose-based reinforcing agents to increase the tensile strength of the aerosol forming matrix, the reduction in tensile strength caused by the inclusion of hydroxypropyl methylcellulose can be overcome, while still providing the aforementioned processing advantages associated with hydroxypropyl methylcellulose.

[0018] The aerosol forming matrix may have a hydroxypropyl methylcellulose content greater than about 0.5% by weight. Advantageously, the inventors have found that hydroxypropyl methylcellulose can be an effective binder for the aerosol forming matrix.

[0019] The aerosol forming matrix may have a hydroxypropyl methylcellulose content greater than about 1% by weight. The aerosol forming matrix may have a hydroxypropyl methylcellulose content greater than about 5% by weight. The aerosol forming matrix may have a hydroxypropyl methylcellulose content greater than about 10% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content greater than about 15% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content greater than about 20% by weight.

[0020] The aerosol-forming matrix may have a hydroxypropyl methylcellulose content less than about 50% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content less than about 45% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content less than about 40% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content less than about 35% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content less than about 30% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content less than about 25% by weight.The aerosol-forming matrix may have a hydroxypropyl methylcellulose content of less than about 20% by weight.

[0021] The aerosol-forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% by weight to about 50% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% by weight to about 45% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% by weight to about 40% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% by weight to about 35% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% by weight to about 30% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% by weight to about 25% by weight. The aerosol-forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% by weight to about 20% by weight.

[0022] The aerosol forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% to about 40% by weight. The aerosol forming matrix may have a hydroxypropyl methylcellulose content of about 1% to about 40% by weight. Aerosol specification 2 / 19 page 4 CN 121286757 A The forming matrix may have a hydroxypropyl methylcellulose content of about 5% to about 40% by weight. The aerosol forming matrix may have a hydroxypropyl methylcellulose content of about 10% to about 40% by weight. The aerosol forming matrix may have a hydroxypropyl methylcellulose content of about 15% to about 40% by weight. The aerosol forming matrix may have a hydroxypropyl methylcellulose content of about 20% to about 40% by weight. The aerosol forming matrix may have a hydroxypropyl methylcellulose content of about 25% to about 40% by weight.

[0023] The aerosol forming matrix may have a hydroxypropyl methylcellulose content of about 0.5% to about 45% by weight. The aerosol-forming matrix may contain between about 1% by weight and about 45% by weight of hydroxypropyl methylcellulose. The aerosol-forming matrix may contain between about 1% by weight and about 40% by weight of hydroxypropyl methylcellulose. The aerosol-forming matrix may contain between about 5% by weight and about 40% by weight of hydroxypropyl methylcellulose. The aerosol-forming matrix may contain between about 5% by weight and about 35% by weight of hydroxypropyl methylcellulose. The aerosol-forming matrix may contain between about 10% by weight and about 35% by weight of hydroxypropyl methylcellulose. The aerosol-forming matrix may contain between about 10% by weight and about 30% by weight of hydroxypropyl methylcellulose. The aerosol-forming matrix may contain between about 15% by weight and about 30% by weight of hydroxypropyl methylcellulose. The aerosol-forming matrix may contain between about 15% by weight and about 25% by weight of hydroxypropyl methylcellulose.The aerosol forming matrix may have a hydroxypropyl methylcellulose content between about 20% by weight and about 25% by weight.

[0024] The hydroxypropyl methylcellulose may be a low-viscosity hydroxypropyl methylcellulose. For example, hydroxypropyl methylcellulose may have a viscosity of 0.05 Pa / s. In some instances, hydroxypropyl methylcellulose may have a viscosity of 0.015 Pa / s. In some instances, hydroxypropyl methylcellulose may have a viscosity between 0.015 Pa / s and 0.05 Pa / s.

[0025] Advantageously, the inventors have found that using low-viscosity hydroxypropyl methylcellulose can provide benefits during the manufacturing process. The use of low-viscosity hydroxypropyl methylcellulose can result in the formation of a low-viscosity slurry, which is easier to mix and transfer during manufacturing and processing.

[0026] The aerosol forming matrix may have a cellulose-based fortifier content greater than about 0.5% by weight. The aerosol forming matrix may have a cellulose-based fortifier content greater than about 1% by weight. The aerosol forming matrix may have a content of more than about 5% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a content of more than about 10% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a content of more than about 15% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a content of more than about 20% by weight of a cellulose-based fortifier.

[0027] The aerosol forming matrix may have a content of less than about 50% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a content of less than about 45% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a content of less than about 40% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a content of less than about 35% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a content of less than about 30% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a content of less than about 25% by weight of a cellulose-based fortifier. The aerosol forming matrix may have a cellulose-based fortifier content of less than about 20% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of less than about 15% by weight.

[0028] The aerosol forming matrix may have a cellulose-based fortifier content of between about 0.5% by weight and about 50% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of between about 0.5% by weight and about 45% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of between about 0.5% by weight and about 40% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of between about 0.5% by weight and about 35% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of between about 0.5% by weight and about 30% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of between about 0.5% by weight and about 25% by weight.The aerosol forming matrix may have a cellulose-based fortifier content of about 0.5 wt% to about 20 wt%. The aerosol forming matrix may have a cellulose-based fortifier content of about 0.5 wt% to about 15 wt%. The aerosol forming matrix may have a cellulose-based fortifier content of about 0.5 wt% to about 10 wt%. The aerosol forming matrix may have a cellulose-based fortifier content of about 0.5 wt% to about 5 wt%.

[0029] The aerosol forming matrix may have a cellulose-based fortifier content of about 1 wt% to about 40 wt%. The aerosol forming matrix may have a cellulose-based fortifier content of about 5 wt% to about 40 wt%. The aerosol forming matrix may have a cellulose-based fortifier content of about 10 wt% to about 40 wt%. The aerosol forming matrix may have a cellulose-based fortifier content of about 15 wt% to about 40 wt%. The aerosol forming matrix may have a cellulose-based fortifier content of about 20% to about 40% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of about 25% to about 40% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of about 30% to about 40% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of about 35% to about 40% by weight.

[0030] The aerosol forming matrix may have a cellulose-based fortifier content of about 1% to about 35% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of about 5% to about 35% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of about 5% to about 30% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of about 10% to about 30% by weight. The aerosol forming matrix may have a cellulose-based fortifier content of about 10% to about 25% by weight. The aerosol forming matrix may have a cellulose-based reinforcing agent content of about 15% to about 25% by weight. The aerosol forming matrix may have a cellulose-based reinforcing agent content of about 15% to about 20% by weight.

[0031] The one or more cellulose-based reinforcing agents may include cellulose fibers. Advantageously, the inventors have found that cellulose fibers can be particularly effective cellulose-based reinforcing agents in increasing the tensile strength of the aerosol forming matrix.

[0032] The aerosol forming matrix may have a cellulose fiber content greater than about 0.5% by weight. The aerosol forming matrix may have a cellulose fiber content greater than about 1% by weight. The aerosol forming matrix may have a cellulose fiber content greater than about 5% by weight.The aerosol-forming matrix may have a cellulose fiber content greater than about 10% by weight. The aerosol-forming matrix may have a cellulose fiber content greater than about 15% by weight. The aerosol-forming matrix may have a cellulose fiber content greater than about 20% by weight.

[0033] The aerosol-forming matrix may have a cellulose fiber content less than about 50% by weight. The aerosol-forming matrix may have a cellulose fiber content less than about 45% by weight. The aerosol-forming matrix may have a cellulose fiber content less than about 40% by weight. The aerosol-forming matrix may have a cellulose fiber content less than about 35% by weight. The aerosol-forming matrix may have a cellulose fiber content less than about 30% by weight. The aerosol-forming matrix may have a cellulose fiber content less than about 25% by weight. The aerosol-forming matrix may have a cellulose fiber content less than about 20% by weight. The aerosol-forming matrix may have a cellulose fiber content less than about 15% by weight.

[0034] The aerosol-forming matrix may have a cellulose fiber content between about 0.5% by weight and about 50% by weight. The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 45 wt%. The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 40 wt%. The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 35 wt%. The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 30 wt%. The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 25 wt%. The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 20 wt%. (Specification 4 / 19, page 6, CN 121286757 A) The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 15 wt%. The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 10 wt%. The aerosol-forming matrix may have a cellulose fiber content of about 0.5 wt% to about 5 wt%.

[0035] The aerosol-forming matrix may have a cellulose fiber content of about 1% to about 40% by weight. The aerosol-forming matrix may have a cellulose fiber content of about 5% to about 40% by weight. The aerosol-forming matrix may have a cellulose fiber content of about 10% to about 40% by weight. The aerosol-forming matrix may have a cellulose fiber content of about 15% to about 40% by weight. The aerosol-forming matrix may have a cellulose fiber content of about 20% to about 40% by weight. The aerosol-forming matrix may have a cellulose fiber content of about 25% to about 40% by weight. The aerosol-forming matrix may have a cellulose fiber content of about 30% to about 40% by weight.The aerosol forming matrix may have a cellulose fiber content of about 35% to about 40% by weight.

[0036] The aerosol forming matrix may have a cellulose fiber content of about 1% to about 35% by weight. The aerosol forming matrix may have a cellulose fiber content of about 5% to about 35% by weight. The aerosol forming matrix may have a cellulose fiber content of about 5% to about 30% by weight. The aerosol forming matrix may have a cellulose fiber content of about 10% to about 30% by weight. The aerosol forming matrix may have a cellulose fiber content of about 10% to about 25% by weight. The aerosol forming matrix may have a cellulose fiber content of about 15% to about 25% by weight. The aerosol forming matrix may have a cellulose fiber content of about 15% to about 20% by weight.

[0037] The one or more cellulose-based reinforcing agents may include microcrystalline cellulose. Advantageously, the inventors have found that microcrystalline cellulose can be a cellulose-based reinforcing agent that is particularly effective in increasing the tensile strength of the aerosol forming matrix.

[0038] The aerosol forming matrix may have a microcrystalline cellulose content greater than about 0.5% by weight. The aerosol forming matrix may have a microcrystalline cellulose content greater than about 1% by weight. The aerosol forming matrix may have a microcrystalline cellulose content greater than about 5% by weight. The aerosol forming matrix may have a microcrystalline cellulose content greater than about 10% by weight. The aerosol forming matrix may have a microcrystalline cellulose content greater than about 15% by weight. The aerosol forming matrix may have a microcrystalline cellulose content greater than about 20% by weight.

[0039] The aerosol forming matrix may have a microcrystalline cellulose content less than about 50% by weight. The aerosol forming matrix may have a microcrystalline cellulose content less than about 45% by weight. The aerosol forming matrix may have a microcrystalline cellulose content less than about 40% by weight. The aerosol forming matrix may have a microcrystalline cellulose content less than about 35% by weight. The aerosol forming matrix may have a microcrystalline cellulose content less than about 30% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of less than about 25% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of less than about 20% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of less than about 15% by weight.

[0040] The aerosol forming matrix may have a microcrystalline cellulose content between about 0.5% by weight and about 50% by weight. The aerosol forming matrix may have a microcrystalline cellulose content between about 0.5% by weight and about 45% by weight. The aerosol forming matrix may have a microcrystalline cellulose content between about 0.5% by weight and about 40% by weight. The aerosol forming matrix may have a microcrystalline cellulose content between about 0.5% by weight and about 35% by weight. The aerosol forming matrix may have a microcrystalline cellulose content between about 0.5% by weight and about 30% by weight.The aerosol forming matrix may have a microcrystalline cellulose content of about 0.5 wt% to about 25 wt%. The aerosol forming matrix may have a microcrystalline cellulose content of about 0.5 wt% to about 20 wt%. The aerosol forming matrix may have a microcrystalline cellulose content of about 0.5 wt% to about 15 wt%. The aerosol forming matrix may have a microcrystalline cellulose content of about 0.5 wt% to about 10 wt%. The aerosol forming matrix may have a microcrystalline cellulose content of about 0.5 wt% to about 5 wt%.

[0041] The aerosol forming matrix may have a microcrystalline cellulose content of about 1 wt% to about 40 wt%. The aerosol forming matrix may have a microcrystalline cellulose content of about 5 wt% to about 40 wt%. The aerosol forming matrix may have a microcrystalline cellulose content of about 10 wt% to about 40 wt%. The aerosol forming matrix may have a microcrystalline cellulose content of about 15 wt% to about 40 wt%. The aerosol forming matrix may have a microcrystalline cellulose content of about 20% to about 40% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of about 25% to about 40% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of about 30% to about 40% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of about 35% to about 40% by weight.

[0042] The aerosol forming matrix may have a microcrystalline cellulose content of about 1% to about 35% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of about 5% to about 35% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of about 5% to about 30% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of about 10% to about 30% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of about 10% to about 25% by weight. The aerosol forming matrix may have a microcrystalline cellulose content of about 15% to about 25% by weight. The aerosol forming matrix may have a microcrystalline cellulose content between about 15% by weight and about 20% by weight.

[0043] The one or more cellulose-based reinforcing agents may include cellulose powder. Advantageously, the inventors have found that cellulose powder can be a cellulose-based reinforcing agent that is particularly effective in increasing the tensile strength of the aerosol forming matrix.

[0044] The aerosol forming matrix may have a cellulose powder content greater than about 0.5% by weight. The aerosol forming matrix may have a cellulose powder content greater than about 1% by weight. The aerosol forming matrix may have a cellulose powder content greater than about 5% by weight. The aerosol forming matrix may have a cellulose powder content greater than about 10% by weight. The aerosol forming matrix may have a cellulose powder content greater than about 15% by weight.The aerosol-forming matrix may have a cellulose powder content greater than about 20% by weight.

[0045] The aerosol-forming matrix may have a cellulose powder content less than about 50% by weight. The aerosol-forming matrix may have a cellulose powder content less than about 45% by weight. The aerosol-forming matrix may have a cellulose powder content less than about 40% by weight. The aerosol-forming matrix may have a cellulose powder content less than about 35% by weight. The aerosol-forming matrix may have a cellulose powder content less than about 30% by weight. The aerosol-forming matrix may have a cellulose powder content less than about 25% by weight. The aerosol-forming matrix may have a cellulose powder content less than about 20% by weight. The aerosol-forming matrix may have a cellulose powder content less than about 15% by weight.

[0046] The aerosol-forming matrix may have a cellulose powder content between about 0.5% by weight and about 50% by weight. The aerosol-forming matrix may have a cellulose powder content between about 0.5% by weight and about 45% by weight. The aerosol forming matrix may have a cellulose powder content of about 0.5 wt% to about 40 wt%. The aerosol forming matrix may have a cellulose powder content of about 0.5 wt% to about 35 wt%. The aerosol forming matrix may have a cellulose powder content of about 0.5 wt% to about 30 wt%. The aerosol forming matrix may have a cellulose powder content of about 0.5 wt% to about 25 wt%. The aerosol forming matrix may have a cellulose powder content of about 0.5 wt% to about 20 wt%. The aerosol forming matrix may have a cellulose powder content of about 0.5 wt% to about 15 wt%. The aerosol forming matrix may have a cellulose powder content of about 0.5 wt% to about 10 wt%. The aerosol forming matrix may have a cellulose powder content of about 0.5 wt% to about 5 wt%.

[0047] The aerosol forming matrix may have a cellulose powder content of about 1 wt% to about 40 wt%. The aerosol forming matrix may have a cellulose powder content of about 5 wt% to about 40 wt%. The aerosol-forming matrix may have a cellulose powder content of about 10% to about 40% by weight. The aerosol-forming matrix may have a cellulose powder content of about 15% to about 40% by weight. The aerosol-forming matrix may have a cellulose powder content of about 20% to about 40% by weight. The aerosol-forming matrix may have a cellulose powder content of about 25% to about 40% by weight. The aerosol-forming matrix may have a cellulose powder content of about 30% to about 40% by weight. The aerosol-forming matrix may have a cellulose powder content of about 35% to about 40% by weight.

[0048] The aerosol forming matrix may have a cellulose powder content of about 1% to about 35% by weight. The aerosol forming matrix may have a cellulose powder content of about 5% to about 35% by weight. The aerosol forming matrix may have a cellulose powder content of about 5% to about 30% by weight. The aerosol forming matrix may have a cellulose powder content of about 10% to about 30% by weight. The aerosol forming matrix may have a cellulose powder content of about 10% to about 25% by weight. The aerosol forming matrix may have a cellulose powder content of about 15% to about 25% by weight. The aerosol forming matrix may have a cellulose powder content of about 15% to about 20% by weight.

[0049] The aerosol forming matrix may contain carboxymethyl cellulose. Advantageously, when used in aerosol generating articles, the use of carboxymethyl cellulose can help reduce crusting of the aerosol forming matrix. In some instances, the use of carboxymethyl cellulose will eliminate crusting. As explained below, crusting is the formation of a solid layer on a component of an aerosol-generating article. The inventors have found that crusting can occur because the components of the aerosol-forming matrix may melt and then re-solidify around the component of the aerosol-generating article. Crusting can be a particular problem when the aerosol-forming matrix is ​​used in an aerosol-generating article containing receptors. If crusting forms on a receptor, the crusted receptor will become less effective when the aerosol-forming matrix is ​​heated, which may result in reduced nicotine delivery to the user and / or reduced aerosol formation from the aerosol-forming matrix.

[0050] Carboxymethyl cellulose may include sodium carboxymethyl cellulose. Advantageously, the inventors have found that sodium carboxymethyl cellulose is a carboxymethyl cellulose that may be particularly effective in preventing the aforementioned crusting problem.

[0051] The aerosol-forming matrix may have a carboxymethyl cellulose content greater than about 0.5% by weight. The aerosol-forming matrix may have a carboxymethyl cellulose content greater than about 1% by weight. The aerosol-forming matrix may have a carboxymethyl cellulose content greater than about 5% by weight. The aerosol forming matrix may have a carboxymethyl cellulose content greater than about 10% by weight.

[0052] The aerosol forming matrix may have a carboxymethyl cellulose content less than about 20% by weight. The aerosol forming matrix may have a carboxymethyl cellulose content less than about 15% by weight. The aerosol forming matrix may have a carboxymethyl cellulose content less than about 10% by weight. The aerosol forming matrix may have a carboxymethyl cellulose content less than about 8% by weight. The aerosol forming matrix may have a carboxymethyl cellulose content less than about 5% by weight.

[0053] The aerosol forming matrix may have a carboxymethyl cellulose content between about 0.5% by weight and about 20% by weight. The aerosol forming matrix may have a carboxymethyl cellulose content between about 0.5% by weight and about 15% by weight.The aerosol forming matrix may have a carboxymethyl cellulose content of about 0.5 wt% to about 10 wt%. The aerosol forming matrix may have a carboxymethyl cellulose content of about 0.5 wt% to about 8 wt%. The aerosol forming matrix may have a carboxymethyl cellulose content of about 0.5 wt% to about 5 wt%.

[0054] The aerosol forming matrix may have a carboxymethyl cellulose content of about 1 wt% to about 20 wt%. The aerosol forming matrix may have a carboxymethyl cellulose content of about 5 wt% to about 20 wt%. The aerosol forming matrix may have a carboxymethyl cellulose content of about 8 wt% to about 20 wt%. The aerosol forming matrix may have a carboxymethyl cellulose content of about 10 wt% to about 20 wt%. The aerosol forming matrix may have a carboxymethyl cellulose content of about 15 wt% to about 20 wt%.

[0055] The aerosol forming matrix may have a carboxymethyl cellulose content of about 1 wt% to about 15 wt%. The aerosol forming matrix may have a carboxymethyl cellulose content between about 1% by weight and about 10% by weight. The aerosol forming matrix may have a carboxymethyl cellulose content between about 5% by weight and about 10% by weight. The aerosol forming matrix may have a carboxymethyl cellulose content between about 5% by weight and about 8% by weight.

[0056] The aerosol forming matrix may contain nicotine.

[0057] Nicotine may include one or more nicotine salts. The one or more nicotine salts may be selected from the following list: nicotine lactate, nicotine citrate, nicotine pyruvate, nicotine bitartrate, nicotine benzoate, nicotine pectinate, nicotine alginate, and nicotine salicylate.

[0058] Nicotine may include tobacco extracts.

[0059] The aerosol forming matrix may have a nicotine content greater than about 0.5% by weight. The aerosol-forming matrix may have a nicotine content greater than about 1% by weight. The aerosol-forming matrix may have a nicotine content greater than about 2% by weight. The aerosol-forming matrix may have a nicotine content greater than about 3% by weight. The aerosol-forming matrix may have a nicotine content greater than about 5% by weight. The aerosol-forming matrix may have a nicotine content greater than about 8% by weight.

[0060] The aerosol-forming matrix may have a nicotine content less than about 10% by weight. The aerosol-forming matrix may have a nicotine content less than about 8% by weight. The aerosol-forming matrix may have a nicotine content less than about 5% by weight. The aerosol-forming matrix may have a nicotine content less than about 3% by weight. The aerosol-forming matrix may have a nicotine content less than about 2% by weight. The aerosol-forming matrix may have a nicotine content less than about 1% by weight.

[0061] The aerosol forming matrix may have a nicotine content of about 0.5% to about 10% by weight. The aerosol forming matrix may have a nicotine content of about 0.5% to about 8% by weight. The aerosol forming matrix may have a nicotine content of about 0.5% to about 5% by weight. The aerosol forming matrix may have a nicotine content of about 0.5% to about 3% by weight. The aerosol forming matrix may have a nicotine content of about 0.5% to about 2% by weight. The aerosol forming matrix may have a nicotine content of about 0.5% to about 1% by weight.

[0062] The aerosol forming matrix may have a nicotine content of about 1% to about 5% by weight. The aerosol forming matrix may have a nicotine content of about 2% to about 5% by weight. The aerosol forming matrix may have a nicotine content of about 3% to about 5% by weight.

[0063] The aerosol forming matrix may have a nicotine content between about 0.5% by weight and about 4% by weight. The aerosol forming matrix may have a nicotine content between about 1% by weight and about 4% by weight. The aerosol forming matrix may have a nicotine content between about 1% by weight and about 3% by weight. The aerosol forming matrix may have a nicotine content between about 1% by weight and about 2% by weight.

[0064] The aerosol forming matrix may contain one or more carboxylic acids. Advantageously, containing one or more carboxylic acids in the aerosol forming matrix can produce nicotine salts.

[0065] The one or more carboxylic acids include one or more of lactic acid and levulinic acid. Advantageously, the inventors have found that lactic acid and levulinic acid are particularly good carboxylic acids for producing nicotine salts.

[0066] The aerosol forming matrix may have a carboxylic acid content greater than about 0.5% by weight. The aerosol forming matrix may have a carboxylic acid content greater than about 1% by weight. The aerosol forming matrix may have a carboxylic acid content greater than about 2% by weight. The aerosol-forming matrix may have a carboxylic acid content greater than about 3% by weight. The aerosol-forming matrix may have a carboxylic acid content greater than about 5% by weight. The aerosol-forming matrix may have a carboxylic acid content greater than about 8% by weight. The aerosol-forming matrix may have a carboxylic acid content greater than about 10% by weight. The aerosol-forming matrix may have a carboxylic acid content greater than about 15% by weight.

[0067] The aerosol-forming matrix may have a carboxylic acid content less than about 20% by weight. The aerosol-forming matrix may have a carboxylic acid content less than about 15% by weight. The aerosol-forming matrix may have a carboxylic acid content less than about 10% by weight. The aerosol-forming matrix may have a carboxylic acid content less than about 8% by weight. The aerosol-forming matrix may have a carboxylic acid content less than about 5% by weight. The aerosol-forming matrix may have a carboxylic acid content less than about 3% by weight.The aerosol forming matrix may have a carboxylic acid content of less than about 2% by weight. The aerosol forming matrix may have a carboxylic acid content of less than about 1% by weight.

[0068] The aerosol forming matrix may have a carboxylic acid content of between about 0.5% by weight and about 20% by weight. The aerosol forming matrix may have a carboxylic acid content of between about 0.5% by weight and about 15% by weight. The aerosol forming matrix may have a carboxylic acid content of between about 0.5% by weight and about 10% by weight. The aerosol forming matrix may have a carboxylic acid content of between about 0.5% by weight and about 8% by weight. The aerosol forming matrix may have a carboxylic acid content of between about 0.5% by weight and about 5% by weight. The aerosol forming matrix may have a carboxylic acid content of between about 0.5% by weight and about 3% by weight. The aerosol forming matrix may have a carboxylic acid content of between about 0.5% by weight and about 2% by weight. The aerosol forming matrix may have a carboxylic acid content of between about 0.5% by weight and about 1% by weight.

[0069] The aerosol forming matrix may have a carboxylic acid content of between about 1% by weight and about 10% by weight. The aerosol forming matrix may have a carboxylic acid content of about 2% to about 10% by weight. The aerosol forming matrix may have a carboxylic acid content of about 3% to about 10% by weight. The aerosol forming matrix may have a carboxylic acid content of about 5% to about 10% by weight. The aerosol forming matrix may have a carboxylic acid content of about 8% to about 10% by weight.

[0070] The aerosol forming matrix may have a carboxylic acid content of about 1% to about 20% by weight. The aerosol forming matrix may have a carboxylic acid content of about 1% to about 15% by weight. The aerosol forming matrix may have a carboxylic acid content of about 1% to about 10% by weight. The aerosol forming matrix may have a carboxylic acid content of about 1% to about 8% by weight. The aerosol forming matrix may have a carboxylic acid content of about 2% to about 5% by weight. The aerosol forming matrix may have a carboxylic acid content of about 3% to about 5% by weight.

[0071] The aerosol forming matrix may contain one or more aerosol forming agents. Advantageously, including one or more aerosol forming agents in the aerosol forming matrix will improve aerosol formation.

[0072] The one or more aerosol forming agents may include glycerol. The one or more aerosol forming agents may include propylene glycol. The one or more aerosol forming agents may include a combination of glycerol and propylene glycol.

[0073] The aerosol forming matrix may have an aerosol forming agent content of more than about 0.5% by weight. The aerosol forming matrix may have an aerosol forming agent content of more than about 10% by weight. The aerosol forming matrix may have an aerosol forming agent content of more than about 20% by weight. The aerosol forming matrix may have an aerosol forming agent content of more than about 30% by weight. The aerosol forming matrix may have an aerosol forming agent content of more than about 40% by weight.The aerosol forming matrix may have an aerosol forming agent content greater than about 50% by weight. The aerosol forming matrix may have an aerosol forming agent content greater than about 60% by weight.

[0074] The aerosol forming matrix may have an aerosol forming agent content less than about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content less than about 70% by weight. The aerosol forming matrix may have an aerosol forming agent content less than about 60% by weight.

[0075] The aerosol forming matrix may have an aerosol forming agent content between about 0.5% by weight and about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content between about 0.5% by weight and about 70% by weight. The aerosol forming matrix may have an aerosol forming agent content between about 0.5% by weight and about 60% by weight. The aerosol forming matrix may have an aerosol forming agent content between about 0.5% by weight and about 50% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 0.5% to about 40% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 0.5% to about 30% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 0.5% to about 20% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 0.5% to about 10% by weight.

[0076] The aerosol forming matrix may have an aerosol forming agent content of about 1% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 10% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 20% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 30% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 40% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 50% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 60% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 70% to about 80% by weight.

[0077] The aerosol forming matrix may have an aerosol forming agent content of about 20% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 30% to about 80% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 30% to about 70% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 40% to about 70% by weight. The aerosol forming matrix may have an aerosol forming agent content of about 40% to about 60% by weight.The aerosol forming matrix may have an aerosol forming agent content of about 50% to about 60% by weight.

[0078] The ratio of the weight percentage of hydroxypropyl methylcellulose in the aerosol forming matrix to the weight percentage of the cellulose-based fortifier may be greater than or equal to about 1. The ratio of the weight percentage of hydroxypropyl methylcellulose in the aerosol forming matrix to the weight percentage of the cellulose-based fortifier may be greater than or equal to about 1.25. The ratio of the weight percentage of hydroxypropyl methylcellulose in the aerosol forming matrix to the weight percentage of the cellulose-based fortifier may be greater than or equal to about 1.5.

[0079] The ratio of the weight percentage of hydroxypropyl methylcellulose in the aerosol forming matrix to the weight percentage of the cellulose-based fortifier may be less than or equal to about 1. The ratio of the weight percentage of hydroxypropyl methylcellulose in the aerosol forming matrix to the weight percentage of the cellulose-based fortifier may be less than or equal to about 0.75. The weight percentage of hydroxypropyl methylcellulose in the aerosol-forming matrix to the weight percentage of the cellulose-based fortifier can be less than or equal to about 0.5.

[0080] The aerosol-generating article may include the aerosol-forming matrix.

[0081] The aerosol-generating article may include a hollow cellulose acetate tube.

[0082] The aerosol-generating article may include a spacer element.

[0083] The aerosol-generating article may include a mouthpiece filter.

[0084] The aerosol-forming matrix, the hollow cellulose acetate tube, the spacer element, and the mouthpiece filter may be arranged sequentially. The aerosol-forming matrix, the hollow cellulose acetate tube, the spacer element, and the mouthpiece filter may be arranged coaxially aligned.

[0085] The aerosol-generating article may include cigarette paper.

[0086] The aerosol-forming matrix, the hollow cellulose acetate tube, the spacer element, and the mouthpiece filter may be assembled from cigarette paper.

[0087] The aerosol-generating article may have an inlet end and a distal end 1013. In use, the user can insert the mouthpiece into his or her mouth.

[0088] The aerosol generating article may be suitable for use with an electrically operated aerosol generating apparatus, which includes a heater for heating the aerosol generating matrix.

[0089] The aerosol forming matrix may be provided in the form of rods.

[0090] The aerosol generating article may include receptors.

[0091] The receptors may be a plurality of receptor particles, which may be deposited on or embedded in the aerosol forming matrix. The receptor particles may be fixed and held in their initial positions by the aerosol forming matrix. The receptor particles may be uniformly distributed in the aerosol forming matrix. Due to the particulate nature of the receptors, heat can be generated based on the distribution of the particles in the aerosol forming matrix.Alternatively, the receptor may be in the form of one or more sheets, strips, fragments, or bars, which may be placed next to or embedded in the aerosol-forming matrix. The aerosol-forming matrix may include one or more receptor strips.

[0092] The aerosol generating device may include a housing defining a device cavity configured to receive at least a portion of the aerosol-generating article.

[0093] The aerosol generating device may include an atomizer configured to generate aerosols from the aerosol-forming matrix.

[0094] The atomizer may be a thermal atomizer.

[0095] As used herein, the term "thermal atomizer" describes an atomizer configured to heat the aerosol-forming matrix to generate aerosols.

[0096] The aerosol generating device may include any suitable type of thermal atomizer. For example, a thermal atomizer may include a heater. A thermal atomizer may include an electric heater. In one example, a thermal atomizer may include an electric heater that includes a heating element. The heating element may be a resistance heating element. In one example, the heating element may include heater blades or pins adapted to be inserted into the aerosol-forming matrix such that the aerosol-forming matrix is ​​heated from its interior. In another example, the heating element may partially or completely surround the aerosol-forming matrix and circumferentially heat the aerosol-forming matrix from its exterior.

[0097] In another example, the thermal atomizer may include an induction heating device. The induction heating device typically includes an induction source configured to couple with a sensor, which may be disposed outside or inside the aerosol-forming matrix. The induction source generates an alternating electromagnetic field that induces magnetization or eddy currents in the sensor. The sensor may be heated due to hysteresis losses or induced eddy currents, which are heated by ohmic or resistive heating.

[0098] An aerosol generating device may include a sensor. The sensor may be as described above with respect to aerosol generating articles.

[0099] An aerosol generating apparatus including an induction heating device can be configured to receive an aerosol generating article having an aerosol forming matrix and a sensor in thermal proximity to the aerosol forming matrix. Typically, the sensor is in direct contact with the aerosol forming matrix and heat is transferred from the sensor to the aerosol forming matrix primarily by conduction.

[0100] Examples of electrically operated aerosol generating systems with induction heating devices and aerosol generating articles with sensors are described in WO-A1-95 / 27411 and WO-A1-2015 / 177255.

[0101] The aerosol generating apparatus may include a battery and control electronics.

[0102] An aerosol generating system is also provided, comprising an aerosol forming matrix according to the invention and an atomizer configured to generate aerosols from the aerosol forming matrix.

[0103] The atomizer may be a thermal atomizer.

[0104] The aerosol generation system may include any suitable type of thermal atomizer. For example, a thermal atomizer may include a heater. A thermal atomizer may include an electric heater. In one example, a thermal atomizer may include an electric heater that includes a heating element. The heating element may be a resistance heating element. In one example, the heating element may include heater blades or pins adapted to be inserted into the aerosol forming matrix such that the aerosol forming matrix is ​​heated from its interior. In another example, the heating element may partially or completely surround the aerosol forming matrix and circumferentially heat the aerosol forming matrix from its exterior.

[0105] In another example, the thermal atomizer may include an induction heating device. An induction heating device typically includes an induction source configured to be coupled to a sensor, which may be disposed outside or inside the aerosol forming matrix. The induction source generates an alternating electromagnetic field that induces magnetization or eddy currents in the sensor. The sensor may be heated due to hysteresis loss or induced eddy current, which is heated by ohmic or resistive heating.

[0106] An aerosol generation system may include a sensor. The sensor may be as described above with respect to aerosol generation articles.

[0107] An aerosol generation system including an induction heating device may be configured to receive an aerosol generation article having an aerosol forming matrix and a sensor in thermal proximity to the aerosol forming matrix. Typically, the sensor is in direct contact with the aerosol forming matrix and heat is transferred from the sensor to the aerosol forming matrix primarily by conduction.

[0108] Examples of electrically operated aerosol generation systems with induction heating devices and aerosol generation articles with sensors are described in WO-A1-95 / 27411 and WO-A1-2015 / 177255.

[0109] An aerosol generation system may include a battery and control electronics.

[0110] For the avoidance of doubt, the features described above with respect to the aerosol forming matrix may also apply, where appropriate, to aerosol generating articles, aerosol generating apparatuses, and aerosol generating systems. Similarly, the features described above with respect to aerosol generating articles may also apply, where appropriate, to aerosol generating apparatuses and aerosol generating systems, and vice versa.

[0111] It should be understood that any feature described herein with respect to one embodiment of the aerosol forming matrix, aerosol generating article, aerosol generating apparatus, or aerosol generating system may also be applied to other embodiments of the aerosol forming matrix, aerosol generating article, aerosol generating apparatus, or aerosol generating system according to this disclosure. Features described with respect to one embodiment may also be applied to another embodiment according to this disclosure. It should also be understood that an aerosol generator according to this disclosure may be provided in a cylinderless aerosol generating apparatus.Therefore, any features described herein with respect to the tube can be equally applied to the aerosol generating apparatus.

[0112] The invention is defined in the claims. However, a non-exhaustive list of non-limiting examples is provided below. Any one or more features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

[0113] EX1. An aerosol forming matrix for use in an aerosol generating system, the aerosol forming matrix comprising:

[0114] one or more aerosol forming agents;

[0115] hydroxypropyl methylcellulose; and

[0116] one or more cellulose-based reinforcing agents.

[0117] EX2. The aerosol forming matrix according to Example EX1, wherein the aerosol forming matrix has a hydroxypropyl methylcellulose content greater than about 0.5% by weight.

[0118] EX3. The aerosol forming matrix according to Example EX2, wherein the aerosol forming matrix has a hydroxypropyl methylcellulose content between about 0.5% by weight and about 50% by weight.

[0119] EX4. An aerosol forming matrix according to Example EX3, wherein the aerosol forming matrix has a hydroxypropyl methylcellulose content of about 10% by weight to about 40% by weight.

[0120] EX5. An aerosol forming matrix according to Example EX4, wherein the aerosol forming matrix has a hydroxypropyl methylcellulose content of about 15% by weight to about 30% by weight.

[0121] EX6. An aerosol forming matrix according to Example EX5, wherein the aerosol forming matrix has a hydroxypropyl methylcellulose content of about 20% by weight to about 25% by weight.

[0122] EX7. An aerosol forming matrix according to any one of Examples EX1 to EX6, wherein the aerosol forming matrix specification page 12 / 19 14 CN 121286757 A has a cellulose-based fortifier content greater than about 0.5% by weight.

[0123] EX8. An aerosol forming matrix according to Example EX7, wherein the aerosol forming matrix has a cellulose-based reinforcing agent content of about 0.5% by weight to about 50% by weight.

[0124] EX9. An aerosol forming matrix according to Example EX8, wherein the aerosol forming matrix has a cellulose-based reinforcing agent content of about 0.5% by weight to about 40% by weight.

[0125] EX10. An aerosol forming matrix according to Example EX9, wherein the aerosol forming matrix has a cellulose-based reinforcing agent content of about 5% by weight to about 30% by weight.

[0126] EX11. An aerosol forming matrix according to Example EX10, wherein the aerosol forming matrix has a cellulose-based reinforcing agent content of about 10% by weight to about 20% by weight.

[0127] EX12. An aerosol forming matrix according to Example EX11, wherein the aerosol forming matrix has a cellulose-based fortifying agent content of about 15% to about 20% by weight.

[0128] EX13. An aerosol forming matrix according to any one of Examples EX1 to EX12, wherein the one or more cellulose-based fortifying agents comprise cellulose fibers.

[0129] EX14. An aerosol forming matrix according to Example EX13, wherein the aerosol forming matrix has a cellulose fiber content of more than about 0.5% by weight.

[0130] EX15. An aerosol forming matrix according to Example EX14, wherein the aerosol forming matrix has a cellulose fiber content of about 0.5% to about 50% by weight.

[0131] EX16. An aerosol forming matrix according to Example EX15, wherein the aerosol forming matrix has a cellulose fiber content of about 0.5% to about 40% by weight.

[0132] EX17. An aerosol forming matrix according to Example EX16, wherein the aerosol forming matrix has a cellulose fiber content of about 5% by weight to about 30% by weight.

[0133] EX18. An aerosol forming matrix according to Example EX17, wherein the aerosol forming matrix has a cellulose fiber content of about 10% by weight to about 20% by weight.

[0134] EX19. An aerosol forming matrix according to Example EX18, wherein the aerosol forming matrix has a cellulose fiber content of about 15% by weight to about 20% by weight.

[0135] EX20. An aerosol forming matrix according to any one of Examples EX1 to EX19, wherein the one or more cellulose-based reinforcing agents include microcrystalline cellulose.

[0136] EX21. An aerosol forming matrix according to Example EX20, wherein the aerosol forming matrix has a microcrystalline cellulose content of more than about 0.5% by weight.

[0137] EX22. An aerosol forming matrix according to Example EX21, wherein the aerosol forming matrix has a microcrystalline cellulose content of about 0.5% by weight to about 50% by weight.

[0138] EX23. An aerosol forming matrix according to Example EX22, wherein the aerosol forming matrix has a microcrystalline cellulose content of about 0.5% by weight to about 40% by weight.

[0139] EX24. An aerosol forming matrix according to Example EX23, wherein the aerosol forming matrix has a microcrystalline cellulose content of about 5% by weight to about 30% by weight.

[0140] EX25. An aerosol forming matrix according to Example EX18, wherein the aerosol forming matrix has a microcrystalline cellulose content of about 10% by weight to about 20% by weight.

[0141] EX26. An aerosol forming matrix according to Example EX24, wherein the aerosol forming matrix has a microcrystalline cellulose content of about 15% to about 20% by weight. Specification 13 / 19 pages 15 CN 121286757 A

[0142] EX27. An aerosol forming matrix according to any one of Examples EX1 to EX26, wherein the one or more cellulose-based fortifiers comprises cellulose powder.

[0143] EX28. An aerosol forming matrix according to Example EX27, wherein the aerosol forming matrix has a cellulose powder content of more than about 0.5% by weight.

[0144] EX29. An aerosol forming matrix according to Example EX28, wherein the aerosol forming matrix has a cellulose powder content of about 0.5% to about 50% by weight.

[0145] EX30. An aerosol forming matrix according to Example EX29, wherein the aerosol forming matrix has a cellulose powder content of about 0.5% to about 40% by weight.

[0146] EX31. An aerosol forming matrix according to Example EX30, wherein the aerosol forming matrix has a cellulose powder content of about 5% by weight to about 30% by weight.

[0147] EX32. An aerosol forming matrix according to Example EX31, wherein the aerosol forming matrix has a cellulose powder content of about 10% by weight to about 20% by weight.

[0148] EX33. An aerosol forming matrix according to Example EX32, wherein the aerosol forming matrix has a cellulose powder content of about 15% by weight to about 20% by weight.

[0149] EX34. An aerosol forming matrix according to any one of Examples EX1 to EX33, wherein the aerosol forming matrix comprises carboxymethyl cellulose.

[0150] EX35. An aerosol forming matrix according to Example EX34, wherein the aerosol forming matrix has a carboxymethyl cellulose content of more than about 0.5% by weight.

[0151] EX36. An aerosol forming matrix according to Example EX35, wherein the aerosol forming matrix has a carboxymethyl cellulose content of about 0.5% by weight to about 20% by weight.

[0152] EX37. An aerosol forming matrix according to Example EX36, wherein the aerosol forming matrix has a carboxymethyl cellulose content of about 0.5% by weight to about 15% by weight.

[0153] EX38. An aerosol forming matrix according to Example EX37, wherein the aerosol forming matrix has a carboxymethyl cellulose content of about 5% by weight to about 10% by weight.

[0154] EX39. An aerosol forming matrix according to Example EX38, wherein the aerosol forming matrix has a carboxymethyl cellulose content of about 5% by weight to about 7% by weight.

[0155] EX40. An aerosol forming matrix according to any one of Examples EX28 to EX39, wherein the carboxymethyl cellulose comprises sodium carboxymethyl cellulose.

[0156] EX41. An aerosol forming matrix according to any one of Examples EX1 to EX40, wherein the aerosol forming matrix comprises nicotine.

[0157] EX42. An aerosol forming matrix according to Example EX41, wherein the aerosol forming matrix has a nicotine content greater than about 0.5% by weight.

[0158] EX43. An aerosol forming matrix according to Example EX42, wherein the aerosol forming matrix has a nicotine content between about 0.5% by weight and about 5% by weight.

[0159] EX44. An aerosol forming matrix according to any one of Examples EX1 to EX43, wherein the aerosol forming matrix comprises one or more carboxylic acids.

[0160] EX45. An aerosol forming matrix according to Example EX44, wherein the one or more carboxylic acids comprise one or more of lactic acid and levulinic acid.

[0161] EX46. An aerosol generating article comprising the aerosol forming matrix of any one of Examples EX1 to EX45, page 14 / 19, CN 121286757 A.

[0162] EX42. An aerosol generating system comprising:

[0163] an aerosol generating apparatus; and

[0164] an aerosol generating article comprising the aerosol generating article according to Example EX46.

[0165] Specific embodiments will be further described by way of example only with reference to the accompanying drawings, in which:

[0166] FIG1 illustrates an example of an aerosol generating article containing the aerosol forming matrix as described herein; and

[0167] FIG2 illustrates an example of an aerosol generating system comprising an aerosol generating apparatus and the aerosol generating article shown in FIG1.

[0168] Aerosol generation systems for delivering aerosols to users typically include an atomizer configured to generate an inhalable aerosol from an aerosol-forming matrix. Some known aerosol generation systems include thermal atomizers, such as electric heaters or induction heating devices. Thermal atomizers are configured to heat and vaporize the aerosol-forming matrix to generate an aerosol. A typical aerosol-forming matrix used in aerosol generation systems is a nicotine formulation, which may be a liquid nicotine formulation containing aerosol-forming agents such as glycerin and / or propylene glycol.

[0169] Some aerosol-forming matrices have low tensile strength. This means that such aerosol-forming matrices may crack or break before the user uses the aerosol-generating article, which is undesirable. Some aerosol-forming matrices have a tendency to melt, which may result in the formation of a crust on a portion of the aerosol-generating article.A crust formed on a portion of an aerosol-generating article may reduce the level of nicotine delivered to the user. A crust formed on a portion of an aerosol-generating article may reduce the volume of aerosol generated by the aerosol-generating system.

[0170] For example, as discussed above, in an aerosol-generating system including an induction heating device, the aerosol-generating article may include a sensor that can be heated by an induction source. Heat from the sensor is then transferred to the aerosol-forming matrix. Components of the aerosol-forming matrix can then be vaporized to generate an aerosol. However, if the sensor is encased in an aerosol-forming matrix crust, the crust may reduce heat transfer from the heated sensor to the aerosol-forming matrix. This reduction in heat transfer from the heated sensor to the aerosol-forming matrix may reduce the level of nicotine delivered to the user. This reduction in heat transfer from the heated sensor to the aerosol-forming matrix may reduce the volume of aerosol generated by the aerosol-generating system.

[0171] Therefore, it is desirable to provide an aerosol-forming matrix with increased tensile strength. It is also desirable to provide an aerosol-forming matrix with a reduced melting tendency, which may reduce the crusting effect of the aerosol-forming matrix on the components of the aerosol-generating article.

[0172] FIG1 illustrates an example of an aerosol-generating article 1000 containing an aerosol-forming matrix as described herein.

[0173] In the example of FIG1, the aerosol-generating article 1000 includes four elements: an aerosol-forming matrix 1020, a hollow cellulose acetate tube 1030, a spacer element 1040, and a mouthpiece filter 1050. The four elements 1020, 1030, 1040, and 1050 are arranged sequentially and coaxially aligned. The four elements 1020, 1030, 1040, and 1050 are assembled from cigarette paper 1060 to form the aerosol-generating article 1000.

[0174] In the example of FIG1, the aerosol-generating article 1000 has an inlet end 1012 and a distal end 1013. During use, the user can insert the mouth end 1012 into his or her mouth. The distal end 1013 is located at the end of the aerosol generating article 1000 opposite to the mouth end 1012. This example of the aerosol generating article 1000 illustrated in FIG1 is particularly suitable for use with electrically operated aerosol generating apparatus that includes a heater for heating the aerosol generating matrix. Specification 15 / 19 pages 17 CN 121286757 A

[0175] In one example, when assembled, the aerosol generating article 1000 has a length of about 45 mm and has an outer diameter of about 7.2 mm and an inner diameter of about 6.9 mm.

[0176] In the example of FIG1, the aerosol forming matrix 1020 is provided in the form of a rod made by pressing a sheet of aerosol forming matrix. Many examples of the aerosol forming matrix 1020 are shown in Table 1 below. Sheets are gathered, pressed, and wrapped in filter paper (not shown) to form a rod.

[0177] As shown in FIG. 1, the aerosol generating article 1000 is designed to be engaged with an aerosol generating device for consumption. This aerosol generating device includes means for heating an aerosol forming matrix 1020 to a sufficient temperature to form an aerosol. Typically, the aerosol generating device may include a heating element surrounding the aerosol generating article 1000 adjacent to the aerosol forming matrix 1020 or an element inserted into the aerosol forming matrix 1020.

[0178] Upon engagement with the aerosol generating device, a smoker inhales through the mouth end 1012 of the smoking article 1000, and the aerosol forming matrix 1020 is heated to a temperature of approximately 375 degrees Celsius. At this temperature, volatile compounds escape from the aerosol forming matrix 1020. These compounds condense to form an aerosol. The aerosol is inhaled through a filter 1050 and enters the user's mouth.

[0179] FIG2 illustrates a portion of an electrically operated aerosol generation system 2000. This aerosol generation system utilizes heating blades 2100 to heat the aerosol generation matrix 1020 of an aerosol generation article 1000. In the example of FIG2, the heating blades 2100 are mounted within the aerosol article receiving chamber of an electrically operated aerosol generation device 2010. The aerosol generation device 2010 defines a plurality of air holes 2050 for allowing airflow to the aerosol generation article 1000. Airflow is indicated by arrows in FIG2. The aerosol generation device 2010 includes a power supply and electronics, which are not shown in FIG2. The aerosol generation article 1000 of FIG2 is as described with respect to FIG1. ​​Examples

[0180] Example formulations (Examples A, B, C, D, and E) having the compositions shown in Table 1 of the aerosol forming matrix according to the invention were prepared. Instruction manual 16 / 19 pages 18 CN 121286757 A

[0181]

[0182] Table 1

[0183] The aerosol forming matrices of Examples A, B, C, D and E were prepared by the following:

[0184] (1) mixing the components with water using heat and agitation to form a slurry;

[0185] (2) casting the slurry onto a planar surface to form a film with a thickness of about 210 micrometers;

[0186] (3) leaving the film on the planar surface to solidify; and

[0187] (3) drying the film by heating it to about 140 degrees Celsius for about 8 minutes.

[0188] The aerosol forming matrices obtained after drying are solid. In other words, each aerosol forming matrix has a stable size and shape and does not flow. The term “stable” is used herein to indicate that the aerosol forming matrix substantially maintains its shape and quality when exposed to a variety of environmental conditions. Therefore, when exposed to standard temperature and pressure while the relative humidity varies from about 10% to about 60%, the aerosol-forming matrix essentially does not release or absorb water.

[0189] This is particularly advantageous because it will ensure that the aerosol forming matrix according to the invention does not release a liquid phase during storage or, for example, during transport from the manufacturing facility to the point of sale.

[0190] When used in an aerosol generating apparatus, as described above, the aerosol forming matrices of Examples A, B, C, D, and E are heated to a temperature of approximately 375 degrees Celsius. The nicotine and glycerol contained in the membrane evaporate. The nicotine and glycerol condense to form an inhalable aerosol. This aerosol can then be inhaled by the user. The aerosol forming matrix shrinks slightly and its volume decreases. However, the membrane remains solid and retains its membrane form. The aerosol forming matrix appears slightly hardened and exhibits a darker brown color.

[0191] The aerosol forming matrix of Example A comprises a combination of hydroxypropyl methylcellulose and a cellulose-based fortifier. In Example A, the cellulose-based fortifier is cellulose fiber. The aerosol forming matrix of Example A also comprises sodium carboxymethylcellulose, nicotine, glycerol, and a carboxylic acid. In Example A, the carboxylic acid is lactic acid.

[0192] The aerosol forming matrix of Example B comprises a combination of hydroxypropyl methylcellulose and a cellulose-based reinforcing agent. In Example B, the cellulose-based reinforcing agent is cellulose fiber. The aerosol forming matrix of Example B contains more cellulose fiber than the aerosol forming matrix of Example A. The aerosol forming matrix of Example B also comprises sodium carboxymethylcellulose (CN 121286757 A, page 17 / 19, specification) and glycerol.

[0193] The aerosol forming matrix of Example C comprises a combination of hydroxypropyl methylcellulose and a cellulose-based reinforcing agent. In Example C, the cellulose-based reinforcing agent is cellulose fiber. The aerosol forming matrix of Example C contains less cellulose fiber than the aerosol forming matrix of Example A. The aerosol forming matrix of Example C comprises agar instead of sodium carboxymethylcellulose. The aerosol forming matrix of Example C also comprises glycerol.

[0194] The aerosol forming matrix of Example D comprises a combination of hydroxypropyl methylcellulose and two cellulose-based reinforcing agents. In Example D, the cellulose-based reinforcing agent is cellulose fiber and microcrystalline cellulose. The aerosol-forming matrix of Example D contains less cellulose fiber than the aerosol-forming matrix of Example A. The aerosol-forming matrix of Example D contains agar instead of sodium carboxymethyl cellulose. The aerosol-forming matrix of Example D also contains glycerol.

[0195] The aerosol-forming matrix of Example E contains a combination of hydroxypropyl methylcellulose and a cellulose-based reinforcing agent. In Example E, the cellulose-based reinforcing agent is cellulose powder. The aerosol-forming matrix of Example E also contains sodium carboxymethyl cellulose, nicotine, glycerol, and a carboxylic acid. In Example E, the carboxylic acid is lactic acid.

[0196] The effects of the components of Examples A, B, C, and D above, including the effect of the cellulose-based fortifier, will now be demonstrated by comparison with examples of comparative aerosol-forming matrices. The comparative aerosol-forming matrices comprise 25.53 wt% hydroxypropyl methylcellulose, 6.38 wt% agar, and 63.81 wt% glycerol.

[0197] Table 2 shows a comparison of the tensile strength between the five example formulations (Examples A, B, C, and D) of the aerosol-forming matrices and the comparative examples.

[0198] The tensile strength of the example and comparative formulations was measured using conventional methods that stretched a given-size test specimen of each formulation at a constant elongation until it broke. A tensile strength testing instrument was attached to the test specimen, which provides a measurement of the breaking force when the formulation breaks. The tensile strength of the test specimen was obtained by dividing the breaking force at break by the width of the specimen.

[0199]

[0200] Table 2

[0201] As shown in Table 2, compared with the comparative example, the aerosol forming matrix of Example A provides an increase of 256 N / m in tensile strength. This corresponds to an increase of 61% in tensile strength.

[0202] Compared with the comparative example, the aerosol forming matrix of Example B provides an increase of 1159 N / m in tensile strength. This corresponds to an increase of 275% in tensile strength.

[0203] Compared with the comparative example, the aerosol forming matrix of Example C provides an increase of 409 N / m in tensile strength. This corresponds to an increase of 97% in tensile strength.

[0204] Compared with the comparative example, the aerosol forming matrix of Example D provides an increase of 778 N / m in tensile strength. This corresponds to an increase of 185% in tensile strength.

[0205] Therefore, compared with the comparative example, the aerosol forming matrices of Examples A, B, C, and D all show a significant increase in tensile strength. The inventors have discovered that this increase in the tensile strength of the aerosol forming matrix can provide numerous advantages, particularly for subsequent processing steps in the manufacture of aerosol-generated articles containing the aerosol forming matrix.

[0206] For example, after the aerosol forming matrix is ​​formed, it is typically wound onto a spool. The increase in the tensile strength of the aerosol forming matrix can reduce breakage of the matrix due to tension when the aerosol forming matrix is ​​transferred to the spool.

[0207] Subsequent manufacturing steps typically involve unwinding the aerosol forming matrix from the spool and then pressing the aerosol forming matrix using a pressing roller. The increase in the tensile strength of the aerosol forming matrix can reduce breakage during the pressing process.

[0208] The reduction in breakage of the aerosol forming matrix during subsequent processing steps can reduce waste of the aerosol forming matrix in the manufacture of aerosol-generated articles containing the aerosol forming matrix.Additionally, if the aerosol-forming matrix breaks down during the processing steps, manufacturing time may be lost; therefore, an increase in the tensile strength of the aerosol-forming matrix can improve manufacturing time.

[0209] Although the aerosol-forming matrices of Examples C and D exhibit a large increase in tensile strength, Examples C and D may cause crusting on a portion of the aerosol-generating article containing the aerosol-forming matrix because they contain agar. The inventors believe that agar melts when heated (e.g., by an aerosol-generating apparatus). The molten agar can form agglomerates and form around a portion of the aerosol-generating article. After the aerosol-generating article is no longer heated, the molten agar subsequently cools and solidifies into a crust. This is particularly problematic for aerosol-generating articles containing receptors, as crusting on receptors has been found to reduce heat transfer from the receptors to the aerosol-forming matrix, which may reduce the nicotine level delivered to the user and reduce the volume of aerosol delivered to the user.

[0210] The aerosol-forming matrices of Examples A and B do not contain agar. Instead, the aerosol-forming matrices of Examples A and B contain sodium carboxymethyl cellulose. The inventors have discovered that aerosol-forming matrices containing carboxymethyl cellulose instead of agar exhibit reduced crusting. In fact, in some instances, the inventors have found that using carboxymethyl cellulose instead of agar can completely eliminate the crusting problem. Reducing and eliminating crusting, particularly on receptors, leads to an increase in nicotine levels delivered to the user and an increase in the volume of aerosols generated from the aerosol-forming matrix.Specification Page 19 / 19, 21 CN 121286757 A Figure 1 Figure 2 Drawings of the Specification Page 1 / 1, 22 CN 121286757 A Abstract The present invention provides an aerosol-forming substrate. There is provided an aerosol-forming substrate (1020) for use in an aerosol- generating system (2000). The aerosol-forming substrate (1020) comprises: one or more aerosol formers; hydroxypropylmethyl cellulose; and one or more cellulose based strengthening agents. The aerosol- forming substrate (1020) has an aerosol former content of greater than 30 percent by weight. The one or more cellulose based strengthening agents comprises cellulose powder. The aerosol-forming substrate (1020) has a cellulose powder content of between about 0.5 percent by weight and about 50 percent by weight.。

Claims

1. An aerosol-forming substrate for use in an aerosol-generating system, the aerosol- forming substrate comprising: one or more aerosol formers, wherein the aerosol-forming substrate has an aerosol former content of greater than 30 percent by weight; hydroxypropyl methylcellulose; one or more cellulose-based reinforcing agents, and carboxymethylcellulose.

2. The aerosol-forming substrate according to claim 1, wherein the aerosol-forming substrate has a hydroxypropyl methylcellulose content of between about 0.5 percent by weight to about 50 percent by weight.

3. The aerosol-forming substrate according to any preceding claim, wherein the aerosol- forming substrate has a cellulose-based reinforcing agent content of greater than about 0.5 percent by weight.

4. The aerosol-forming substrate according to claim 3, wherein the aerosol-forming substrate has a cellulose-based reinforcing agent content of between about 0.5 percent by weight to about 50 percent by weight.

5. The aerosol-forming substrate according to claim 4, wherein the aerosol-forming substrate has a cellulose-based reinforcing agent content of between about 0.5 percent by weight to about 40 percent by weight.

6. The aerosol-forming substrate according to any preceding claim, wherein the one or more cellulose-based reinforcing agents comprise cellulose fibres.

7. The aerosol-forming substrate according to claim 6, wherein the aerosol-forming substrate has a cellulose fibre content of between about 0.5 percent by weight to about 50 percent by weight.

8. The aerosol-forming substrate according to any preceding claim, wherein the one or more cellulose-based reinforcing agents comprise microcrystalline cellulose.

9. The aerosol-forming substrate according to claim 8, wherein the aerosol-forming substrate has a microcrystalline cellulose content of between about 0.5 percent by weight to about 50 percent by weight.

10. The aerosol-forming substrate according to any preceding claim, wherein the one or more cellulose-based reinforcing agents comprise cellulose powder.

11. The aerosol-forming substrate according to claim 10, wherein the aerosol-forming substrate has a cellulose powder content of between about 0.5 percent by weight to about 50 percent by weight.

12. The aerosol-forming substrate according to claim 1, wherein the aerosol-forming substrate has a carboxymethylcellulose content of greater than about 0.5 percent by weight.

13. The aerosol-forming substrate according to claim 1, wherein the aerosol-forming substrate has a carboxymethylcellulose content of between about 0.5 percent by weight to about 20 percent by weight.

14. The aerosol-forming substrate according to any of claims 1, 12 or 13, wherein the carboxymethylcellulose comprises sodium carboxymethylcellulose.

15. An aerosol-generating article comprising the aerosol-forming substrate according to any preceding claim.

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