WO2023202059A1

WO2023202059A1 - Induction-heating-based vapor-producing sheet, and tobacco product

Info

Publication number: WO2023202059A1
Application number: PCT/CN2022/132479
Authority: WO
Inventors: 唐良颖; 刘华臣; 谭健; 黄婷; 吴聪; 彭峥
Original assignee: 湖北中烟工业有限责任公司
Priority date: 2022-04-20
Filing date: 2022-11-17
Publication date: 2023-10-26
Also published as: CN114617286A

Abstract

An induction-heating-based vapor-producing sheet, comprising a first tobacco sheet (1), a magnetic-induction material layer (3) and a second tobacco sheet (4), which are sequentially arranged, wherein one side face of the magnetic-induction material layer (3) is fixedly connected to the first tobacco sheet (1); and the other side face of the magnetic-induction material layer (3) is fixedly connected to the second tobacco sheet (4).

Description

An induction-heated smoking piece and tobacco product

This application claims priority to the Chinese patent application submitted to the China Patent Office on April 20, 2022, with the application number 202210415225.8 and the invention title "An induction-heated smoking sheet and tobacco product", the entire content of which is incorporated by reference. in this application.

Technical field

The present invention relates to the field of tobacco technology, and in particular to an induction-heated smoking piece and tobacco products.

Background technique

There are many carcinogens in the smoke produced when tobacco is burned, which will cause great harm to human health. Electric heating smoking devices have emerged in the market. Electrically heated smoking devices are a smoking method that uses electronic devices to heat tobacco substances. Electrically heated smoking sets include resistance heating and electromagnetic heating smoking sets. Electrically heated smoking articles with resistance heating are in direct contact with cigarettes or shredded tobacco through heating elements in the form of electrically heated tubes, needles or plates, and bake the cigarette or shredded tobacco through direct contact at a temperature lower than the ignition point of the cigarette. The aroma-causing components of tobacco are evaporated to meet the smoker's smoking requirements. However, resistance heating has low heating efficiency. At present, the research direction of heating methods for heat-not-burn cigarettes is mainly electromagnetic induction heating.

Electromagnetic induction heating uses the principle of high-frequency current heating to convert alternating current into high-frequency current, thereby generating a high-frequency magnetic field. When the magnetic field lines in the magnetic field act on the heating element, the magnetic field lines are cut, generating a large number of small eddy currents, causing the heating element itself to heat up rapidly , thereby achieving the purpose of heating cigarettes. Common induction heating cigarettes include built-in receptors in the smoking material or magnetic particles added to the smoking material. When the receptor is built into the smoking substance, the receptor is usually placed in the center of the smoking substance. This causes the receptor to only be in close contact with the adjacent smoking substance and has little heating effect on the smoking substance on the periphery of the cigarette. It is not good, resulting in uneven heating and inability to effectively utilize all the smoking substances. Adding magnetic particles to the smoking material cannot ensure that the particles are evenly distributed in the smoking material, and the contact area of the particles is small. In order to achieve a better heating effect, a larger number of particles needs to be added, which increases the complexity of the process and Processing costs.

Contents of the invention

In view of this, the present invention provides an induction-heated smoking sheet. Each tobacco sheet can be in contact with the induction material, and the heat conduction is faster and more uniform, which reduces the energy consumption of each cigarette. The energy loss is smaller and the heating efficiency is improved. higher.

The invention also provides a tobacco product.

In order to achieve the above objects, the present invention provides the following technical solutions:

An induction-heated smoking sheet includes a first tobacco sheet, a magnetic induction material layer and a second tobacco sheet arranged in sequence. One side of the magnetic induction material layer is fixedly connected to the first tobacco sheet, and the other side is connected to the first tobacco sheet. The second tobacco sheet is fixedly connected.

Optionally, the magnetic induction material layer is a magnetic slurry layer printed, sprayed or coated on one of the first tobacco sheet or the second tobacco sheet, and the other is bonded to the first tobacco sheet through an adhesive layer. on the magnetically sensitive material layer.

Optionally, the magnetic induction material layer is a ferromagnetic material sheet, and the ferromagnetic material sheet is bonded between the first tobacco sheet and the second tobacco sheet through an adhesive layer.

Optionally, the ferromagnetic material sheet is made of one of iron alloy or ferrite.

Optionally, the adhesive layer is a chitin adhesive, sodium carboxymethylcellulose adhesive or sodium hydroxymethyl starch adhesive.

Optionally, the magnetic slurry of the magnetic slurry layer is composed of raw materials with the following mass ratio: magnetic powder 50%-80%, binder 2%-12%, solvent 10%-30%, dispersant 0.2-1.5 %, anti-settling agent 0.2-1.5%, defoaming agent 0.1-1%; the particle size of the magnetic powder is 1-15 μm.

Optionally, the adhesive is one of water-based acrylic resin, water-based polyurethane resin or water-based silicone carbon resin; the solvent is one of water or ethanol.

It can be seen from the above technical solution that the induction heating smoking sheet provided by the present invention includes a first tobacco sheet, a magnetic induction material layer and a second tobacco sheet. A magnetic induction material layer is provided between the first tobacco sheet and the second tobacco sheet. , forming a composite structure of two tobacco sheets sandwiching a flexible magnetic induction material layer, so that the magnetic induction material is in close contact with the tobacco sheets. Since each tobacco sheet can be in contact with the induction material, the heat conduction is faster and more uniform, reducing the cost of each cigarette. The energy consumption is smaller, the energy loss is smaller, and the heating efficiency is higher. The susceptor in the present invention is arranged between the tobacco sheets. There is no need to install the susceptor in the smoking set, and there is no need to clean the smoking set. This avoids the problems of damage and replacement of the susceptor of the smoking set in the prior art.

The invention also provides a tobacco product, which includes a filter segment and a tobacco segment. The tobacco segment includes a plurality of the above-mentioned induction-heated smoking pieces. The outer side of the tobacco segment is wrapped with a fixing layer, and the fixing layer is close to An air flow channel is provided on one side of the tobacco section.

Optionally, the tobacco section includes several rectangular induction-heated smoking pieces, each of the induction-heated smoking pieces is arranged in parallel, and the induction-heated smoking pieces are arranged parallel to the axis of the tobacco section. ;

A first gap is left between different induction heated smoke generating pieces.

Optionally, the tobacco section includes several circular induction-heated smoking pieces, each of the induction-heated smoking pieces is arranged in parallel, and the induction-heated smoking pieces are perpendicular to the axis of the tobacco section. set up;

A second gap is left between different induction heated smoke generating pieces.

The tobacco product of the present invention includes a plurality of the above-mentioned induction-heated smoking pieces, and therefore has its advantages, which will not be described again here.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an induction-heated smoke-generating piece provided by an embodiment of the present invention;

Figure 2 is a schematic structural diagram of an induction-heated smoke-generating piece provided by another embodiment of the present invention;

Figure 3 is a schematic structural diagram of an induction-heated smoke-generating piece provided by yet another embodiment of the present invention;

Figure 4 is a schematic structural diagram of a tobacco product provided by an embodiment of the present invention;

Figure 5 is a schematic diagram of the structure in direction A of Figure 4;

Figure 6 is a schematic structural diagram of a tobacco product provided by another embodiment of the present invention;

Figure 7 is a schematic structural diagram in direction B of Figure 6;

Figure 8 is a schematic structural diagram of the fixed layer provided by an embodiment of the present invention from an angle;

Figure 9 is a schematic structural diagram of the fixed layer provided by an embodiment of the present invention from another angle;

Figure 10 is a schematic structural diagram of the application of a fixed layer provided by an embodiment of the present invention.

in:

1. First tobacco sheet, 2. Adhesive layer, 3. Magnetic induction material layer, 4. Second tobacco sheet, 5. Fixed layer, 501. Bottom layer, 502. Fastening block, 503. Air flow channel, 6. Filter section , 601. Cigarette holder, 602. Cooling section, 603. Smoke diversion section, 7. Tobacco section, 701. Second gap, 702. First gap.

Detailed ways

The invention discloses an induction heating smoking sheet. Each tobacco sheet can be in contact with the induction material, and the heat conduction is faster and more uniform. The energy consumption of each cigarette is reduced, the energy loss is smaller, and the heating efficiency is higher.

The invention also provides a tobacco product.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1 to 6. The induction-heated smoking sheet of the present invention includes a first tobacco sheet 1, a magnetic induction material layer 3 and a second tobacco sheet 4 arranged in sequence. One side of the magnetic induction material layer 3 is in contact with the first tobacco sheet. The sheet 1 is fixedly connected, and the other side is fixedly connected to the second tobacco sheet 4.

Among them, the magnetic induction material layer 3 is a flexible sheet or coating.

The induction-heated smoking sheet of the present invention includes a first tobacco sheet 1, a magnetic induction material layer 3 and a second tobacco sheet 4. A magnetic induction material layer 3 is provided between the first tobacco sheet 1 and the second tobacco sheet 4, forming two A composite structure in which a flexible magnetic induction material layer 3 is sandwiched between a tobacco sheet, so that the magnetic induction material is in close contact with the tobacco sheet. Since each tobacco sheet can be in contact with the induction material, the heat conduction is faster and more uniform, reducing the energy consumption of each cigarette. consumption, smaller energy loss and higher heating efficiency. The susceptor in the present invention is arranged between the tobacco sheets. There is no need to install the susceptor in the smoking set, and the smoking set does not need to be cleaned. This avoids the problems of damage and replacement of the susceptor of the smoking set in the prior art.

In one embodiment, the magnetic induction material layer 3 is a magnetic slurry layer printed, sprayed or coated on one side of the second tobacco sheet 4, and the first tobacco sheet 1 is bonded to the magnetic induction material layer 3 through the adhesive layer 2. One side of the second tobacco sheet 4 is as shown in Figure 1 . During production, after a whole second tobacco sheet 4 is formed, a flexible magnetic sensor made of one or more layers of nanometer-thick sensing material is formed on the upper surface of the second tobacco sheet 4 through a printing, spraying or coating process. Material layer 3, and then place a formed first tobacco sheet 1 on the upper surface of the magnetic induction material layer 3. The first tobacco sheet 1 is connected to the magnetic induction material layer 3 through the adhesive layer 2. It can be understood that the adhesive layer 2 is free of Toxic and harmless adhesive to avoid poisoning of smokers. Finally, it is fixed and formed through rolling, drying and other processes to form a composite structure of two tobacco sheets sandwiching a layer of magnetic induction material layer 3. Alternatively, the magnetic induction material layer 3 is a magnetic slurry layer printed, sprayed or coated on the first tobacco sheet 1, and the second tobacco sheet 4 is bonded to a side of the magnetic induction material layer 3 away from the second tobacco sheet 4 through the adhesive layer 2. side, as shown in Figure 2. The specific production method refers to the above production method. The difference between the two is that the magnetic induction material layer 3 is printed, sprayed or coated on the first tobacco sheet 1, which will not be described again here.

In another embodiment, the magnetically sensitive material layer 3 is a ferromagnetic material sheet, and the ferromagnetic material sheet is bonded between the first tobacco sheet 1 and the second tobacco sheet 4 through the adhesive layer 2 , that is, the magnetically sensitive material layer 3 One side is connected to the first tobacco sheet 1 through an adhesive layer 2, and the other side is connected to the second tobacco sheet 4 through another adhesive layer 2, as shown in Figure 3. In this embodiment, ferromagnetic materials are directly made into magnetic material sheets similar to tobacco sheets, that is, the magnetic induction material layer 3 is a magnetic material sheet, for example, the magnetic induction material layer 3 is an iron-nickel alloy foil. In this embodiment, two tobacco sheets and a magnetic induction material layer 3 are compositely formed through the adhesive layer 2. The structure is simple, and at the same time, the uniform contact between the magnetic induction material layer 3 and each tobacco sheet is ensured, ensuring the uniformity of induction heating. .

Furthermore, the ferromagnetic material sheet is made of one of iron alloy or ferrite.

Wherein, the adhesive layer 2 is one of chitin adhesive, sodium carboxymethylcellulose adhesive or sodium hydroxymethyl starch adhesive. It can be understood that the adhesive layer 2 can also be a mixture of two or three types of the above-mentioned adhesives, and the specific mixing ratio is determined by those skilled in the art.

The magnetic slurry of the magnetic slurry layer is composed of raw materials with the following mass ratio: magnetic powder 50%-80%, adhesive 2%-12%, solvent 10%-30%, dispersant 0.2-1.5%, anti-sedimentation agent 0.2~1.5%, defoaming agent 0.1~1%. The particle size of magnetic powder is 1 to 15 μm. First, the dispersant, anti-settling agent and defoaming agent are dissolved in a solvent according to the mass ratio to obtain an organic carrier, and then the magnetic powder, binder and organic carrier are mixed into a uniform paste, which is the above-mentioned magnetic slurry. Among them, dispersant, anti-settling agent, and defoaming agent are all commonly used materials in the prior art, and will not be described again here.

Further, the adhesive is one of water-based acrylic resin, water-based polyurethane resin or water-based silicone carbon resin; the solvent is one of water or ethanol.

In the induction-heated smoking sheet of the present invention, since each tobacco sheet can be in contact with the magnetic induction material layer 3, the magnetic induction material layer 3 can be in close thermal contact with all tobacco sheets, resulting in more uniform heating and higher heat transfer efficiency. , the energy utilization rate is also higher, reducing the energy consumption of each cigarette and increasing the battery life of the smoking device.

The present invention also provides a tobacco product, which includes a filter section 6 and a tobacco section 7. The tobacco section 7 is filled with induction-heated smoking sheets. The tobacco section 7 includes a number of the above-mentioned induction-heated smoking pieces, as shown in Figures 4 to 7. In order to facilitate the fixation of the smoking pieces at the tobacco section 7, the outer side of the tobacco section 7 is wrapped with a fixing layer 5. The fixing layer 5 An airflow channel 503 is provided on the side close to the tobacco section 7 . The filter section 6 includes a mouthpiece 601, a cooling section 602 and a smoke guide section 603, as shown in Figures 4 and 6. The smoke guide section 603 is a hollow cellulose acetate tube, the cooling section 602 is filled with polylactic acid particles or films, the cigarette holder 601 is filled with acetate fiber tows, and the outer layers of the cigarette holder 601, the cooling section 602 and the smoke guide section 603 They are all covered with cigarette paper. The above structure, that is, the materials of each section, are all existing technologies and will not be described again here.

Specifically, as shown in Figures 8 to 10, the fixing layer 5 includes a bottom layer 501. A number of fastening blocks 502 are evenly distributed on the bottom layer 501. The surface of the fastening blocks 502 away from the bottom layer 501 is used to clamp the tobacco section 7. There is a gap between the fastening blocks 502, and the gap is the air flow channel 503. The length direction of the air flow channel 503 is set along the length direction of the tobacco section 7 to facilitate air flow. The fastening block 502 is fixedly connected to the bottom layer 501 . The bottom layer 501 and the fastening block 502 are both made of plant fiber.

In one embodiment, the tobacco section 7 includes several rectangular induction-heated smoking pieces, each of the induction-heated smoking pieces is arranged in parallel, and the induction-heated smoking pieces are arranged parallel to the axis of the tobacco section 7 , as shown in Figure 6 and Figure 7. A first gap 702 is left between different induction heated smoke generating pieces to facilitate air flow. The specific production process is: perform a slicing process on the composite above-mentioned induction-heated smoking pieces. In order to ensure the structural stability of the sliced smoking materials, usually, the size of the sliced smoking pieces is larger than the size of the smoke-generating pieces at the required position. The size of the cigarette pieces should be large, and the cigarette pieces are usually cut into slightly larger block-shaped rectangular structures to ensure that the composite smoking material as a whole will not be scattered during transportation and cigarette rolling. When rolling a cigarette, multiple smoking pieces are arranged parallel to the axis of the cigarette, leaving a first gap 702 between each smoking piece.

In another embodiment, the tobacco section 7 includes several circular induction-heated smoking pieces, each of the induction-heated smoking pieces is arranged in parallel, and the induction-heated smoking pieces are perpendicular to the edges of the tobacco section 7 The axis (that is, the axis of the cigarette) is set as shown in Figures 4 and 5. A second gap 701 is left between different induction heated smoke generating pieces. The specific production process is as follows: cut the composite induction-heated smoking pieces into a circular structure with a diameter equivalent to that of a cigarette, then stack and arrange multiple cut circular smoking pieces, and finally use cigarettes. The paper is rolled and spliced. Since the porosity of the composite molded smoking sheets is small, in order to ensure smooth airflow when smoking the cigarette, the stacked circular smoking sheets are first rolled through the fixing layer 5 and then wrapped in cigarette paper. The circular smoking material forms the tobacco section 7, and then the non-tobacco section of the tobacco product and the tobacco section 7 are rolled into one body through cigarette paper.

In the description of this solution, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "inner", "outer", etc. is based on the orientation or position shown in the drawings. The relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present solution.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this solution, "plurality" means two or more, unless otherwise explicitly and specifically limited.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

An induction-heated smoking sheet, characterized in that it includes a first tobacco sheet, a magnetic induction material layer and a second tobacco sheet arranged in sequence. One side of the magnetic induction material layer is fixedly connected to the first tobacco sheet, and the other side is fixedly connected to the first tobacco sheet. One side is fixedly connected to the second tobacco sheet.
The induction heating smoking sheet according to claim 1, characterized in that the magnetic induction material layer is a magnetic slurry printed, sprayed or coated on one of the first tobacco sheet or the second tobacco sheet. material layer, and the other is bonded to the magnetic induction material layer through an adhesive layer.
The induction heating smoking sheet according to claim 1, characterized in that the magnetic induction material layer is a ferromagnetic material sheet, and the ferromagnetic material sheet is bonded to the first tobacco sheet and the second tobacco sheet through an adhesive layer. between flakes of tobacco.
The induction heating smoking piece according to claim 3, wherein the ferromagnetic material sheet is made of one of iron alloy or ferrite.
The induction heating smoking sheet according to claim 2 or 3, characterized in that the adhesive layer is a chitin adhesive, sodium carboxymethyl cellulose adhesive or sodium hydroxymethyl starch adhesive.
The induction heating smoking sheet according to claim 2, characterized in that the magnetic slurry of the magnetic slurry layer is composed of raw materials with the following mass ratio: magnetic powder 50%-80%, binder 2%-12 %, solvent 10%-30%, dispersant 0.2-1.5%, anti-settling agent 0.2-1.5%, defoaming agent 0.1-1%; the particle size of the magnetic powder is 1-15 μm.
The induction heating smoking sheet according to claim 6, characterized in that the adhesive is one of water-based acrylic resin, water-based polyurethane resin or water-based silicon carbon resin; the solvent is water or ethanol. A sort of.
A tobacco product, including a filter segment and a tobacco segment, characterized in that the tobacco segment includes several induction-heated smoking sheets according to any one of claims 1-7, and the outer side of the tobacco segment is wrapped with A fixing layer, an air flow channel is provided on one side of the fixing layer close to the tobacco section.
The tobacco product according to claim 8, wherein the tobacco section includes a plurality of rectangular induction-heated smoking pieces, each of the induction-heated smoking pieces is arranged in parallel, and the induction-heated smoking pieces The sheets are arranged parallel to the axis of the tobacco segment;

A first gap is left between different induction heated smoke generating pieces.
The tobacco product according to claim 8, wherein the tobacco section includes a plurality of circular induction-heated smoking pieces, each of the induction-heated smoking pieces is arranged in parallel, and the induction-heated smoking pieces are arranged in parallel. The tobacco pieces are arranged perpendicular to the axis of the tobacco section;

A second gap is left between different induction heated smoke generating pieces.