CN-122004518-A - Passive self-heating cigarette

CN122004518ACN 122004518 ACN122004518 ACN 122004518ACN-122004518-A

Abstract

The invention relates to a passive self-heating cigarette which sequentially comprises a cigarette core section, a cooling section and a filter tip section from a far end to a near end, wherein the cigarette core section, the cooling section and the filter tip section are formed by tipping paper, the material of the cigarette core section comprises a mixture of a self-heating material and a tobacco base material, the self-heating material comprises an oxidant, a reducing agent and a reaction transfer agent, the oxidant, the reducing agent and the reaction transfer agent are physically separated through a barrier material, the oxidant comprises nitrate and/or permanganate, and the reducing agent comprises iron powder and/or aluminum powder. The passive self-heating cigarette of the invention completely abandons batteries and circuits, can be triggered only by short ignition of a conventional fire source, and realizes the self-heating cigarette with controllable self-heating material chain reaction, uniform heat release and stable temperature field by means of an innovative gradient layered cigarette core structure.

Inventors

SHI HUAIBIN
HE HONGMEI
WU PENGLIN
LI CHAOJIAN
YOU XIAOJUAN
ZHOU TIANYU
XU LIANGTAO
ZHANG LI

Assignees

江苏中烟工业有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260402

Claims (10)

1. The passive self-heating cigarette is characterized by sequentially comprising a cigarette core section, a cooling section and a filter tip section from a far mouth end to a near mouth end; the cigarette core section, the cooling section and the filter tip section are formed by tipping paper; the material of the tobacco core section comprises a mixture of self-heating materials and tobacco base materials; the self-heating material comprises an oxidant, a reducing agent and a reaction transfer agent; the oxidizing agent, reducing agent and reaction transfer agent are physically separated by a barrier material; the oxidizing agent comprises nitrate and/or permanganate; The reducing agent comprises iron powder and/or aluminum powder.
2. The passive self-heating cigarette of claim 1, wherein the self-heating material is distributed in the tobacco substrate in a manner that includes any one of an axial activity gradient distribution, an axial concentration gradient distribution, or a radial stratification distribution; preferably, the mass ratio of the self-heating material to the tobacco base material is 1 (3-6).
3. The passive self-heating cigarette of claim 2, wherein the axially graded activity profile comprises a gradient of reducing agent activity in the self-heating material decreasing from a distal end to a proximal end.
4. The passive self-heating cigarette of claim 2, wherein the axial concentration gradient profile comprises a gradient of self-heating material addition decreasing from a distal end to a proximal end.
5. The passive self-heating cigarette of claim 2, wherein the core segments in the radial layered distribution are of a double concentric circle structure consisting of an inner core layer and an outer layer, wherein the reducing agent activity of the self-heating material in the inner core layer is greater than the reducing agent activity of the self-heating material in the outer layer; Preferably, the diameter D of the concentric inner core layer and the diameter D of the whole tobacco core section meet D/D not less than 2/3; Preferably, the reducing agent of the self-heating material in the inner core layer is a mixture of iron powder and aluminum powder or aluminum powder; Preferably, the reducing agent of the self-heating material in the outer layer is iron powder.
6. The passive self-heating cigarette of any of claims 1-5, wherein the mass ratio of the oxidant, the reductant, and the reaction mediator is (0.5-1.5): 2-4): 0.1-1; preferably, the reaction transfer agent comprises any one or a combination of at least two of a hygroscopic material, a water storage material, an electrolyte or an acidic substance; Preferably, the hygroscopic material comprises calcium chloride; preferably, the water storage material comprises activated carbon and/or diatomaceous earth; Preferably, the electrolyte comprises magnesium sulfate; preferably, the acidic substance comprises tartaric acid and/or citric acid.
7. The passive self-heating cigarette of any of claims 1-6, wherein a thermal insulation material is also wrapped between the core segment and tipping paper; preferably, the thermal insulation material comprises silica aerogel particles; Preferably, the mass ratio of the heat preservation material to the tobacco base material is 1 (20-40).
8. A passive self-heating cigarette according to any of claims 1-7, wherein the barrier material comprises a carbonisable polymer film and/or a low melting point alloy foil.
9. The passive self-heating cigarette of any one of claims 1-8, wherein the cooling section is a hollow structure; preferably, the cooling section is a hollow paper tube; preferably, the filter tip section is made of acetate fiber or polylactic acid.
10. The passive self-heating cigarette of any one of claims 1-9, wherein the tobacco substrate comprises tobacco raw materials, a smoking agent, an adhesive, and a tobacco flavor; preferably, the tobacco raw material comprises any one or a combination of at least two of tobacco sheets, tobacco particles or cut tobacco; Preferably, the tobacco flavor comprises any one or a combination of at least two of vanillin, 2-acetylpyrazine, 2,3, 5-trimethylpyrazine, isoamyl isovalerate, menthyl acetate, phenethyl alcohol, furanone or geraniol; Preferably, the adhesive comprises any one or a combination of at least two of sodium carboxymethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, chitosan, guar gum or cellulose acetate; Preferably, the smoking agent comprises any one or a combination of at least two of propylene glycol, glycerin or sorbitol.

Description

Passive self-heating cigarette Technical Field The invention relates to the technical field of heating cigarettes, in particular to a passive self-heating cigarette. Background Traditional electronic heating cigarettes (HNB) generally depend on electronic elements such as batteries, circuit boards and heating sheets, and have the problems of high cost, complex structure, electrical safety risk, electronic waste pollution after discarding and the like. In order to simplify the structure, some chemical self-heating cigarettes are also presented in the prior patent, and heating materials (such as iron powder, quicklime and the like) which react when meeting air or water are generally adopted. CN107384331a discloses a self-heating material for non-combustion cigarettes, and a method and application thereof, wherein the self-heating material for non-combustion cigarettes consists of calcium oxide and sodium bisulfate solution. The self-heating material has smaller volume, generates no hydrogen while generating heat after excitation reaction, is safe and stable when releasing heat, does not burn or explode, can ensure that the temperature generated by the outer wall of the copper pipe is more than 150 ℃ and the time of the temperature more than 150 ℃ can be more than 5min, and has good application prospect in the aspect of non-burning cigarettes. CN104957767A discloses a self-heating material for non-combustion cigarettes, which comprises, by weight, 25-65% of iron powder, 3-20% of an adsorbent, 1-10% of inorganic salt, 3-20% of activated carbon, 1-10% of a water-absorbent resin and 2-25% of water. The invention also discloses application of the self-heating material in a non-combustion type cigarette and a non-combustion type cigarette with the self-heating material inside tobacco shreds. However, these solutions have the following drawbacks in general: (1) The starting is uncontrollable or depends on a special structure, and extra operations such as plugging, bag breaking and the like are often needed to start the reaction, so that the user experience is poor. (2) The heat release is uneven, the temperature curve is not ideal, the heating material is mixed with tobacco or simply filled, the axial or radial temperature gradient is large, the front end is overheated, the rear end is insufficient, and the smoke release is uneven or the local scorching is caused. (3) The reaction speed and the duration are difficult to coordinate, the rapid starting material is hard and short in heat release, the lasting heat release material is slow in starting, and the ideal heat curve of rapid starting-stable maintaining is difficult to realize in a single volume. Therefore, a passive self-heating cigarette technology which has a simple structure, is convenient to start and can provide a uniform, stable and controllable heating temperature field is urgently needed in the market. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a passive self-heating cigarette. The passive self-heating cigarette of the invention completely abandons batteries and circuits, can be triggered only by short ignition of a conventional fire source, and realizes accurate regulation and control of the chain reaction speed of the self-heating material by introducing a reaction transfer agent consisting of a moisture absorption/water storage material. Meanwhile, the self-heating cigarette with controllable self-heating material chain reaction, uniform heat release and stable temperature field is realized by means of the innovative gradient layered cigarette core structure. In order to achieve the aim of the invention, the invention adopts the following technical scheme: In a first aspect, the invention provides a passive self-heating cigarette, which sequentially comprises a cigarette core section, a cooling section and a filter tip section from a far end to a near end; the cigarette core section, the cooling section and the filter tip section are formed by tipping paper; the material of the tobacco core section comprises a mixture of self-heating materials and tobacco base materials; the self-heating material comprises an oxidant, a reducing agent and a reaction transfer agent; The oxidizing agent, the reducing agent and the reaction transfer agent are physically separated from each other by a barrier material; the oxidizing agent comprises nitrate and/or permanganate; The reducing agent comprises iron powder and/or aluminum powder. The starting component of the heating cigarette comprises an oxidant, a reducing agent and a reaction transfer agent which are stored in a mutually isolated mode. In the initial state, the components are physically separated by the barrier material. In use, the consumer burns the distal end of the wick section with an external source of fire (about 3-5 seconds) causing a rapid increase in the local temperature at that end, which causes melting or carbonization damage to the barrier material