CN113925197A - Aerosol-generating article having a particulate aerosol-generating substrate rod with high porosity - Google Patents
Aerosol-generating article having a particulate aerosol-generating substrate rod with high porosity Download PDFInfo
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- CN113925197A CN113925197A CN202111447341.XA CN202111447341A CN113925197A CN 113925197 A CN113925197 A CN 113925197A CN 202111447341 A CN202111447341 A CN 202111447341A CN 113925197 A CN113925197 A CN 113925197A
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- aerosol
- tobacco particles
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Images
Classifications
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/02—Cigars; Cigarettes with special covers
- A24D1/027—Cigars; Cigarettes with special covers with ventilating means, e.g. perforations
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/20—Cigarettes specially adapted for simulated smoking devices
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0229—Filter rod forming processes
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
Abstract
The invention discloses an aerosol generating article with a particle type aerosol generating substrate rod with high porosity, which comprises a smoking core material section (1), a ventilation hollow section (2) and a filter section (3); the smoking core material section (1) comprises an aerosol generation substrate rod and anti-seepage/heat-conducting cigarette paper wrapping the aerosol generation substrate rod, wherein the aerosol generation substrate rod is formed by bonding scattered tobacco particles through a bonding agent, and the bonding agent is arranged on the partial surface of only part of the tobacco particles in the aerosol generation substrate rod; the internal porosity of the smoking core material section (1) is 40-80%; the air-permeable hollow section (2) and the filter section (3) are wrapped by forming paper (5) to form a filter rod, and the smoking core material section (1) and the filter rod are connected by tipping paper (4). According to the invention, the binder is not arranged on the surfaces of all tobacco particles before the scattered tobacco particles are bonded, and the binder does not cover the whole surfaces of the tobacco particles, so that the problem that the pores are blocked after the binder is cooled in a gap formed between the tobacco particles after the tobacco particles are bonded is solved, and the axial ventilation quantity and porosity of the aerosol generation substrate rod are ensured.
Description
Technical Field
The invention relates to the technical field of cigarette heating and non-combustion, in particular to an aerosol generating product of a particle type aerosol generating substrate rod with high porosity.
Background
With the emphasis of consumers on health problems and the improvement of the demand on the personalized experience of cigarette products, the tobacco industry continuously responds to the demand upgrade of consumers and develops various smoking products with tar and harm reduction. The heating cigarette is different from the traditional cigarette product in the cigarette heating mode, so that the cigarette can meet the sensory requirements of consumers on the cigarette product and provide healthier smoking experience.
The smoking material of the particle type heating cigarette is bulk smoking particles, in the prior art, the bulk smoking particles cannot be fixed, the bulk smoking particles must be filled into the outer tube in a filling mode, particles need to be fixed on two sides of a smoking particle section in a mode of sealing paper and a sealing piece, the production efficiency is low, and the defective rate is high.
On the basis, the invention firstly bonds the bulk smoking particles together by the adhesive to form the aerosol generating substrate rod in a cylindrical form, then independently uses the aerosol generating substrate rod as a solid aerosol generating substrate rod after the aerosol generating substrate rod is wrapped by the anti-seepage/heat-conducting cigarette paper, and then combines the aerosol generating substrate rod with other elements by the processes of filling, rolling or compounding to prepare the aerosol generating product. Because the smoking section is an integral cylindrical aerosol generation substrate rod, the problem that the smoking particles fall and scatter does not occur, and sealing films or plugging pieces positioned at two sides of the smoking section do not need to be arranged. In addition, it is not limited to filling forms and combining it with other elements to make aerosol-generating articles.
At present, the method for preparing the cylindrical aerosol generating substrate rod by bonding the scattered fuming particles through the binder is to directly put the scattered tobacco particles into a stirrer, add a large amount of binder into the stirrer, stir and mix the tobacco particles evenly, extrude the tobacco particles and cool the tobacco particles. The problems with aerosol generating substrate rods produced by this method are: 1. because a large amount of binder is added in the stirring process, after cooling, the cooled binder also exists in gaps between adjacent tobacco particles in the aerosol generation substrate rod, so that the porosity of the aerosol generation substrate rod is low, and the air permeability in the axial direction is small; 2. if a small amount of binder is directly added in the stirring and mixing process to avoid the first problem, the binder is not uniformly dispersed, tobacco particles without sizing on the surface are adjacent, the adhesion cannot be realized, and the problem of scattering of fuming particles is caused; 3. a further more critical problem is that the addition of a large amount of binder also results in the application of a large amount of binder to the surface of each tobacco particle, which in essence is only intended to bind the scattered tobacco particles, but it is undesirable that the areas where the tobacco particles do not bind are also sized, which affects the aerosol release, thereby severely affecting the aerosol release upon heating of the tobacco particles.
Therefore, how to ensure that the surfaces of the tobacco particles that are adhered to each other have a binder, while the surfaces that are not adhered have no binder, is critical to ensuring the porosity and amount of smoke in the aerosol generating substrate rod.
The present invention has been made to solve the above problems.
Disclosure of Invention
The invention provides an aerosol generating article having a particulate aerosol generating substrate rod with high porosity, characterized in that it comprises a smoking core segment 1, a gas permeable hollow segment 2 and a filter segment 3;
the smoking core material segment 1 comprises an aerosol generation substrate rod and anti-seepage/heat conduction cigarette paper wrapping the aerosol generation substrate rod, wherein the aerosol generation substrate rod is formed by bonding scattered tobacco particles through a bonding agent, and the bonding agent is arranged on the partial surface of only part of the tobacco particles in the aerosol generation substrate rod; the internal porosity of the smoking core segment 1 is 40-80%;
the air-permeable hollow section 2 and the filter section 3 are wrapped by forming paper 5 to form a filter rod, and the smoking core material section 1 and the filter rod are connected by tipping paper 4.
More preferably, the porosity of the smoking core segment is 80%.
Preferably, the tobacco particle sized area comprises 20-40% of the tobacco particle surface area.
Preferably, the mass ratio of unsized tobacco particles to sized tobacco particles is from 1:2 to 5: 1.
Preferably, the axial draw resistance of the smoking core segment is from 5 to 40 Pa/mm. More preferably, the axial draw resistance of the smoking core segment is 10 Pa/mm.
Preferably, the gram weight of the anti-seepage/heat-conducting paper is 30-70g/m2(ii) a The particle size of the tobacco particles is 8-60 meshes. More preferably, the barrier/thermal paper has a grammage of 60g/m2. The particle size of the tobacco particles is 20-30 meshes.
Preferably, the binder is selected from chitosan, hydroxyethylated complex modified ethyl cellulose, guar gum, carboxymethyl cellulose, starches, modified starches, plant celluloses, microcrystalline cellulose, hydroxyethyl methyl cellulose.
Preferably, the air-permeable hollow section 2 is made of paper, silica gel, acetate fiber, polylactic acid and non-woven fabric.
Preferably, the air-permeable hollow section 2 is in a groove corrugated shape or a gear shape, and is provided with small hole airflow passages 21 which are distributed circumferentially and penetrate through the air-permeable hollow section 2, and is also provided with a large hole airflow passage 22 which penetrates through the air-permeable hollow section 2 at the axial center; the air-permeable hollow section structure with corrugated grooves can refer to the application number 2021111148695 in the application filed by the applicant, and is named as: a patent for a flavoured aerosol-generating article for a core segment, whilst incorporating into this application reference to a fluted corrugated air-permeable hollow segment. The gear-shaped air-permeable hollow section structure can refer to the structure applied by the applicant, with the application number of 2021111166585, and the name of 2021111166585: a patent for a pierced wick section flavored aerosol-generating article, while incorporating into this application the expression relating to gear-like, air-permeable hollow sections to which this application relates.
Preferably, the pipe wall of the air-permeable hollow section 2 is provided with vent holes 23, and the area of the vent holes is 1/2-7/8 of the cross-sectional area of the filter tip.
Preferably, the forming paper 5 and the tipping paper 4 are naturally air permeable.
Preferably, the aerosol generating article further comprises a functional segment located between the smoking core segment 1 and the air-permeable hollow segment 2, or between the air-permeable hollow segment 2 and the filter segment 3, the functional segment having the functions of cooling and gathering smoke;
when the functional section 6 is located between the air-permeable hollow section 2 and the filtering section 3, the functional section 6 can be a hollow tube, and the wall of the hollow tube is air-permeable, can have an air-permeable function, and can also be air-permeable in a manner of punching the wall of the hollow tube. The hollow tube structure with naturally ventilated tube wall and the preparation method thereof can refer to the application number 2021105997045 which is applied by the applicant and is named as: a heated cigarette filter rod with natural ventilation function and a heated cigarette comprising the same, and the expression of the hollow tube with natural ventilation of the tube wall related to the application is incorporated into the application.
Preferably, the filter segment 3 can be made of conventional solid acetate tow.
The reason for the high porosity of the aerosol-generating articles of the present invention having particulate aerosol-generating substrate rods of high porosity is due to the particular method of preparation, which is two specific methods.
Firstly, by adopting a spraying and gluing method, the binder is directly and uniformly sprayed to the tops of the tobacco particles from a spray header at the tops of the tobacco particles, so that the tobacco particles are only glued to the tops, the bottom surfaces and the side surfaces are not glued, the release of aerosol after the tobacco particles are heated is ensured on the basis of realizing adhesion, and the smoke volume, the axial ventilation volume of the aerosol generating substrate rod and the porosity are ensured.
The method comprises the following steps:
(1) taking tobacco particles, and flatly paving the tobacco particles on a gluing plate to ensure that at least part of the area on the gluing plate contains at least two layers of tobacco particles;
(2) uniformly spraying a binder to the tops of the tobacco particles through a spray header above the sizing plate, so that the tops of the tobacco particles on the surface layer are sized, and the tobacco particles on the bottom layer are not sized;
(3) and finally, uniformly stirring the sizing tobacco particles and the non-sizing tobacco particles, extruding, cooling, and wrapping with anti-seepage/heat-conducting paper to obtain a smoking core material section, wherein gaps among the tobacco particles in the smoking core material section form an airflow channel axially penetrating through the smoking core material section.
Preferably, the mass ratio of tobacco particles to binder is from 2:1 to 10:1, more preferably the mass ratio of tobacco particles to binder is 3: 1.
Preferably, at least 70-100% of the area of the sized sheet contains at least two layers of tobacco particles in step (1), and more preferably, at least 90% of the area of the sized sheet contains at least two layers of tobacco particles.
Preferably, the area of the top-sized tobacco particles in step (2) is 20-40% of the surface area of the tobacco particles, i.e. the sized tobacco particles are only top-sized and the side and bottom surfaces are unsized.
Preferably, the mass ratio of unsized tobacco particles to sized tobacco particles in step (3) is from 1:1 to 5:1, more preferably the mass ratio of unsized tobacco particles to sized tobacco particles is 3: 1.
Secondly, a batch stirring and gluing method is adopted, a part of tobacco particles are firstly placed in a stirrer to be stirred and glued, then the second part of tobacco particles which are not glued are added, so that the situation that glue is arranged on the surface of only a part of tobacco particles and glue is not arranged on the surface of the second part of tobacco particles can be guaranteed, the tobacco particles are stirred, mixed and extruded, the release of aerosol after the tobacco particles are heated is guaranteed on the basis of realizing adhesion, and the smoke volume, the ventilation volume of the aerosol generating substrate rod in the axial direction and the porosity are guaranteed.
The method comprises the following steps:
(1) placing the first part of tobacco particles into a stirrer to be stirred, spraying the binder while stirring, and stirring for 5-20 minutes;
(2) adding a second portion of the tobacco particles to the blender and continuing to blend for a period of 5-10 minutes;
(3) and finally, extruding the mixed first part of tobacco particles and second part of tobacco particles, cooling, and wrapping with anti-seepage/heat-conducting paper to obtain a smoking core material section, wherein gaps among the tobacco particles in the smoking core material section form an airflow channel axially penetrating through the smoking core material section.
The stirring time of the first part of tobacco particles and the stirring time after the second part of tobacco particles are added are not limited to the above time length, the stirring time is determined according to the adding amount of the particles and the adding amount of the binder, the purpose and the degree of the first-step stirring ensure that the first part of tobacco particles and the sprayed binder are uniformly stirred, at least part of the surface of the first part of tobacco particles contains the binder, and the purpose and the degree of the second-step stirring ensure that the first part of tobacco particles and the second part of tobacco particles are uniformly stirred.
Preferably, the mass ratio of the first portion of tobacco particles to the second portion of tobacco particles is from 1:5 to 2:1, more preferably, the mass ratio of the first portion of tobacco particles to the second portion of tobacco particles is 1: 3.
Preferably, the mass ratio of the first portion of tobacco particles to binder is from 2:1 to 10:1, more preferably the mass ratio of tobacco particles to binder is 1: 5.
The anti-seepage/heat-conducting paper has an anti-seepage/heat-conducting layer with an anti-seepage or heat-conducting function, and the anti-seepage/heat-conducting layer comprises a waterproof layer and/or an oil-proof layer and/or a heat-conducting layer;
the waterproof layer adopts alkyl ketene dimer AKD, cationic rosin size or non-iron aluminum sulfate mixed and paraffin material; the oil-proof layer is made of fluorocarbon organic matter, modified starch, AKD and paraffin mixture and AKD and modified starch mixture. The heat conduction layer is selected from but not limited to an aluminum foil layer, and is added to the inner wall of the cigarette paper tube in a sticking mode; the aluminum foil layer can play a role in water resistance and/or oil resistance, and meanwhile, the aluminum foil layer also has a heat conduction and heat preservation function, so that the smoking material on the inner wall of the cigarette is uniformly heated.
Preferably, the waterproof layer and/or the oil-proof layer is coated on the inner wall of the cigarette paper tube in a spraying mode.
In the process of storing aerosol generating products, moisture in the smoking materials permeates to the outer side of the cigarette paper tube to generate yellow spots, so that a waterproof layer needs to be added to the inner wall of the cigarette paper tube filled with the smoking materials. The waterproof layer adopts alkyl ketene dimer AKD, cationic rosin size or non-iron aluminum sulfate mixed and paraffin material, and can prevent moisture in the smoking material from permeating to the outer side of the cigarette paper tube.
Similarly, in the smoking material, a smoking agent, essence and spice and the like can be added, in the long-time placing process, the smoking agent in the smoking material can carry the essence and spice to permeate to the outer side of the paper tube to generate yellow spots to influence the appearance of the paper tube, and the oily smoking agent needs to be added to the inner wall of the cigarette paper tube filled with the smoking material. The oil-proof layer is made of fluorocarbon organic matter, modified starch, AKD and paraffin mixture, and the AKD and modified starch mixture can prevent smoke agents in the smoke generating material from carrying essence and spice to permeate to the outer wall of the paper tube, so that yellow spots are prevented from being generated.
Compared with the prior art, the invention has the following beneficial effects:
1. the aerosol generating article of the present invention comprises a particulate aerosol generating substrate rod having a high porosity, wherein the smoking core segment 1 has an internal porosity of 40-80%, such high porosity being dependent on the structure of the smoking core segment 1, the smoking core segment 1 comprising an aerosol generating substrate rod formed of discrete tobacco particles bound together by a binder, and an impermeable/thermally conductive wrapper circumscribing the aerosol generating substrate rod, and wherein only a portion of the surface of a portion of the tobacco particles in the aerosol generating substrate rod has the binder; that is, the binder is not present on all surfaces of the tobacco particles before bonding, nor is the binder covering all surfaces of the tobacco particles, which ensures that after bonding, the gaps formed between the tobacco particles do not have the problem of blocking the pores after cooling, thereby ensuring the ventilation and porosity of the aerosol generating substrate rod in the axial direction. The high porosity wick not only increases the amount of smoke generated, but also simplifies the structure of the aerosol generating article.
2. The high-porosity fuming core material section 1 has two preparation methods, namely a spraying type and a batch stirring type.
The advantages of the spray-type method for producing a solid aerosol-generating substrate rod having a high porosity are:
(1) by adopting a spraying and gluing method, the binder is directly and uniformly sprayed to the tops of the tobacco particles from a spray header at the tops of the tobacco particles, so that the top gluing of the tobacco particles is only ensured, the bottom surface and the side surfaces are not glued, the area of the top gluing of the tobacco particles accounts for 20-40% of the surface area of the tobacco particles, and after uniform stirring, part of the surface area of at least one of two adjacent tobacco particles is glued, so that the adhesion can be realized. Similarly, the bottom surface and the side surface of the tobacco particles are not glued, so that aerosol can be well released after the tobacco particles are heated, and the smoke quantity is ensured.
(2) The tobacco particles of the present invention are laid directly on the size plate and are not laid as a thin layer on the size plate, but rather at least in some areas on the size plate contain at least two layers of tobacco particles. Therefore, the method further ensures that only part of the surfaces of the tobacco particles are subjected to surface sizing, essentially, in the bonding process, the two tobacco particles are contacted, the bonding of the two tobacco particles can be realized as long as glue is arranged on one surface of the two tobacco particles, the glue is not required to be arranged on the two particles, and thus, after the two particles are bonded, the pores can be prevented from being blocked after the binder in the gap formed between the two particles is cooled, and the axial ventilation quantity and the porosity of the aerosol generation substrate rod are ensured.
The advantage of the batch stirring process for the preparation of solid aerosol generating substrate rods having high porosity is that:
(1) the method of stirring and gluing in batches is adopted, a part of tobacco particles are placed in a stirrer to be stirred, the binder is sprayed while stirring, after the surface of the part of tobacco particles is glued, the second part of tobacco particles are added into the stirrer to be stirred, so that the condition that only the surface of one part of tobacco particles is glued and the surface of the second part of tobacco particles is not glued can be ensured. The first part of tobacco particles with the surface sizing and the second part of particles without the surface sizing are stirred, mixed and extruded, essentially, in the bonding process, the two tobacco particles are contacted, the bonding of the two tobacco particles can be realized as long as glue is arranged on one surface of the two tobacco particles, the glue is not required to be arranged on the two particles, so that the situation that the pores are blocked after the bonding of the two particles is carried out and the bonding agent in the gap formed between the two particles is cooled can be avoided, and the invention ensures the axial ventilation and the porosity of the aerosol generation substrate rod on the basis of realizing the bonding.
(2) Furthermore, the invention can ensure that only part of the surface of the first part of tobacco particles is glued by controlling the amount of the added adhesive, and can well ensure the release of aerosol after the tobacco particles are heated and ensure the smoke quantity because the surface of the tobacco particles is not glued.
Drawings
Figure 1 is a schematic representation of the structure of an aerosol generating article having a particulate aerosol generating substrate rod of high porosity in examples 1 and 2;
names of reference symbols in the description of the drawings: 1-smoke core material section, 2-air permeable hollow section, 3-filtering section, 4-tipping paper, 5-forming paper, 21-small hole airflow channel, 22-large hole airflow channel and 23-air vent.
FIG. 2 is a schematic view of the spray sizing process in example 1 for spray preparation of a smoking core segment with high porosity;
FIG. 3 is a schematic structural view of a high porosity smoking core segment of example 1.
Names of reference symbols in the description of the drawings: p1-sizing board, P2-spraying device, P3-sprayed hot melt adhesive, P4-tobacco particles, P5-fuming core material segment, P6-air flow channel, P41-sizing tobacco particles and P42-unsized tobacco particles.
FIG. 4 is a schematic illustration of the stirring sizing process in batch stirring preparation of a smoking core segment with high porosity according to example 2;
FIG. 5 is a schematic structural view of a high porosity smoking core segment of example 2.
Names of reference symbols in the description of the drawings: j1-mixing drum, J2-spray device, J3-sprayed binder, J4-tobacco particles, J5-fuming core segment, J6-airflow channel, J41-sized tobacco particles, J42-unsized tobacco particles.
Figure 6 is a schematic representation of the structure of an aerosol generating article having a particulate aerosol generating substrate rod of high porosity according to example 3.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wirelessly connected.
In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "provided" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.
It will be understood by those skilled in the art that, unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
This embodiment is an aerosol generating article having a particulate aerosol generating substrate rod of high porosity comprising a smoking core segment 1, a gas permeable hollow segment 2 and a filter segment 3;
the smoking core material segment 1 comprises an aerosol generation substrate rod and anti-seepage/heat conduction cigarette paper wrapping the aerosol generation substrate rod, wherein the aerosol generation substrate rod is formed by bonding scattered tobacco particles through a bonding agent, and the bonding agent is arranged on the partial surface of only part of the tobacco particles in the aerosol generation substrate rod; the internal porosity of the smoking core segment 1 is 80%;
the air-permeable hollow section 2 and the filter section 3 are wrapped by forming paper 5 to form a filter rod, and the smoking core material section 1 and the filter rod are connected by tipping paper 4.
The air-permeable hollow section 2 is made of paper and is corrugated in a groove shape. The ventilation holes 23 are arranged on the tube wall of the ventilation hollow section 2, and the area of the ventilation holes is 1/4 of the cross section area of the filter tip.
The method of making the particulate aerosol generating substrate rod with high porosity of this example was: a method for spraying and gluing. As shown in fig. 2-3, the method specifically comprises the following steps:
(1) taking tobacco particles, and spreading the tobacco particles on a sizing board P1 to ensure that at least part of the area on the sizing board contains at least two layers of tobacco particles P4;
(2) uniformly spraying a binder P3 to the tops of the tobacco particles through a spray header (spray device) P2 above the sizing plate, so that the top layer tobacco particles are sized, and the bottom layer tobacco particles are not sized;
(3) and finally, uniformly stirring the sizing tobacco particles P41 and the non-sizing tobacco particles P42, extruding, cooling, and wrapping with anti-seepage/heat-conducting paper to obtain the smoking core material segment P5.
The mass ratio of the tobacco particles to the binder was 3: 1. In the step (1), at least 90% of the area of the sizing plate contains at least two layers of tobacco particles. The area of the top sizing of the tobacco particles in the step (2) accounts for 30 percent of the surface area of the tobacco particles. That is, the sized tobacco particles are only top-sized, and the sides and bottom are unsized. The mass ratio of the unsized tobacco particles to the sized tobacco particles in step (3) is 3: 1. The gram weight of the anti-seepage/heat-conducting paper is 60g/m2. The particle size of the tobacco particles is 20-30 meshes. The binder is selected from carboxymethyl cellulose.
The axial draw resistance in the resulting smoking core segment was measured to be 10 Pa/mm. The smoking core segment P5 comprises an airflow channel extending axially through the smoking core segment P5, and the porosity of the smoking core segment P5 is 80%.
Example 2
The aerosol generating article of this example was identical in structure to example 1, except that the method of making the high porosity particulate aerosol generating substrate rod was different.
The method of making the particulate aerosol generating substrate rod with high porosity of this example was: a batch stirring method. As shown in fig. 4-5, the method specifically comprises the following steps:
(1) placing the first part of tobacco particles into a stirrer to be stirred, spraying the binder while stirring, and stirring for 10 minutes;
(2) adding a second portion of the tobacco particles to the blender and continuing to blend for a period of 5 minutes;
(3) and finally, extruding the mixed first part of tobacco particles and second part of tobacco particles, cooling, and wrapping with anti-seepage/heat-conducting paper to obtain a smoking core material section, wherein gaps among the tobacco particles in the smoking core material section form an airflow channel J6 axially penetrating through the smoking core material section.
The mass ratio of the first portion of tobacco particles to the second portion of tobacco particles is 1: 3. The mass ratio of the tobacco particles to the binder is 1: 5. The gram weight of the anti-seepage/heat-conducting paper is 60g/m2. The particle size of the tobacco particles is 20-30 meshes. The binder is selected from chitosan.
The axial draw resistance in the resulting smoking core segment was measured to be 10 Pa/mm. The smoking core segment J5 comprises an airflow channel axially extending through the smoking core segment J5, and the porosity of the smoking core segment J5 is 80%.
Example 3
Referring to fig. 6, this embodiment is an aerosol-generating article having a particle-type aerosol-generating substrate rod with high porosity, the method for producing the aerosol-generating substrate rod is the same as that of embodiment 1, the only difference is the cigarette structure, the aerosol-generating article of this embodiment is that a functional segment 6 is added on the basis of embodiment 1, when the functional segment 6 is located between the air-permeable hollow segment 2 and the filter segment 3, the functional segment 6 may be a hollow tube, and the wall of the hollow tube is air-permeable.
Comparative example 1
The aerosol generating article was constructed as in example 1.
Directly putting the scattered tobacco particles into a stirrer, adding a large amount of binder into the stirrer, stirring and mixing uniformly, extruding, and cooling.
The surface of the fuming particle in the finally obtained fuming core material section is almost 100 percent of sizing, the measured porosity is less than 30 percent, and the axial suction resistance is as high as 100 Pa/mm.
Claims (10)
1. An aerosol generating article having a particulate aerosol generating substrate rod of high porosity, characterised in that it comprises a smoking core segment (1), a gas permeable hollow segment (2) and a filter segment (3);
the smoking core material segment (1) comprises an aerosol generation substrate rod and impermeable/heat-conducting cigarette paper wrapping the aerosol generation substrate rod, wherein the aerosol generation substrate rod is formed by bonding scattered tobacco particles through a bonding agent, and only part of the surface of part of the tobacco particles in the aerosol generation substrate rod is provided with the bonding agent; the internal porosity of the smoking core segment (1) is 40-80%;
the air-permeable hollow section (2) and the filter section (3) are wrapped by forming paper (5) to form a filter rod, and the smoking core material section (1) and the filter rod are connected by tipping paper (4).
2. An aerosol-generating article in the form of a particulate aerosol-generating substrate rod having high porosity according to claim 1 wherein the tobacco particle sized area comprises 20-40% of the tobacco particle surface area.
3. An aerosol-generating article in the form of a particulate aerosol-generating substrate rod having high porosity according to claim 1, wherein the mass ratio of unsized tobacco particles to sized tobacco particles is from 1:2 to 5: 1.
4. An aerosol generating article according to claim 1 having a particulate aerosol generating substrate rod of high porosity, wherein the axial draw resistance of the smoking core segment is from 5 to 40 Pa/mm.
5. An aerosol-generating article in the form of a particulate aerosol-generating substrate rod having high porosity according to claim 1 wherein the barrier/thermal paper has a grammage of 30-70g/m2(ii) a The particle size of the tobacco particles is 8-60 meshes.
6. An aerosol generating article in the form of a particulate aerosol generating substrate rod having high porosity according to claim 1 wherein the binder is selected from the group consisting of chitosan, hydroxyethylated complex modified ethyl cellulose, guar gum, carboxymethyl cellulose, starches, modified starches, plant cellulosics, microcrystalline cellulose, hydroxyethyl methyl cellulose.
7. A particulate aerosol-generating substrate rod aerosol-generating article with high porosity according to claim 1, wherein the air-permeable hollow section (2) is made of paper, silica gel, acetate, polylactic acid, non-woven fabric.
8. A particulate aerosol-generating substrate rod aerosol-generating article with high porosity according to claim 1, wherein the air-permeable hollow section (2) is fluted or gear-shaped with circumferentially distributed small pore air flow passages (21) through the air-permeable hollow section (2) and also with axially central large pore air flow passages (22) through the air-permeable hollow section (2); the pipe wall of the air-permeable hollow section (2) is provided with an air vent (23) with the area being 1/2-7/8 of the cross-sectional area of the filter tip.
9. A particulate aerosol-generating substrate rod aerosol-generating article having high porosity according to claim 1, characterised in that the forming paper (5) and the tipping paper (4) are naturally air-permeable.
10. A particulate aerosol generating substrate rod aerosol generating article having high porosity according to claim 1, further comprising a functional segment (6) between the smoking core segment (1) and the air-permeable hollow segment (2) or between the air-permeable hollow segment (2) and the filter segment (3), the functional segment having the function of cooling and converging smoke;
when function section (6) are located between ventilative hollow section (2) and filter segment (3), function section (6) can be the hollow tube, just the hollow tube pipe wall is ventilative, can be that self has ventilative function, also can ventilate through the mode that the pipe wall punched.
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| CN114287665B (en) * | 2022-01-27 | 2024-06-25 | 云南中烟工业有限责任公司 | High-porosity aerosol generating substrate rod and aerosol generating product comprising same |
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