A non-combustion cigarette manufactured based on flocking technology

Abstract

The present invention belongs to the technical field of heat-not-burn cigarettes, and particularly relates to a non-combustion type cigarette manufactured based on flocking technology. The cigarette comprises: a cigarette paper layer, which is a hollow cylindrical structure, an adhesive layer is provided on the inner wall of the cigarette paper layer, and tobacco filler particles, tobacco filler filaments or tobacco filler fibers are fixedly bonded to the adhesive layer. When the cigarette contains tobacco filler particles: the tobacco filler particles will not fall from the cigarette due to the adhesive fastening the particles to the inner wall of the cigarette paper, thereby eliminating the complicated process of using a blocking device at the open end of the cigarette. When the cigarette contains tobacco filler filaments or fibers: the tobacco filler filaments or fibers are arranged radially along the circumference of the cigarette to form countless channels in the radial direction of the cigarette in the same direction as the heat propagation direction. These channels are short and straight, which greatly reduces the thermal resistance of heat propagation in the radial direction of the cigarette, and improves the defects of existing cigarettes such as large thermal resistance, slow heat transfer rate and uneven heating.

Description

Technical Field

[0001] The invention belongs to the technical field of heat-not-burn cigarettes, and in particular relates to a non-burning cigarette manufactured based on flocking technology. Background Art

[0002] In recent years, the sales volume of commercially available heat-not-burn new tobacco products represented by iQOS has continued to rise, and consumer recognition and acceptance have greatly increased. Its heat-not-burn tobacco sticks (cigarettes) are closer to the shape of traditional cigarettes. The tobacco filler in the tobacco stick is a filamentous filler, which is arranged along the axial direction of the cigarette. The central heating sheet of the tobacco stick is inserted along the axial direction of the tobacco stick to heat the above tobacco stick (cigarette) to produce inhalable smoke. Another type of heat-not-burn new tobacco product represented by ploom tech adopts a cigarette cartridge (capsule) form between the traditional cigarette shape and liquid tobacco oil, which contains granular tobacco and produces inhalable smoke through circumferential heating.

[0003] Regardless of whether they are filled with filamentous tobacco or granular tobacco, the above two types of representative products are much less harmful than traditional cigarettes because they avoid burning, especially greatly reducing the release of tar and other harmful substances. Since they do not produce second-hand smoke, they also improve the impact on the environment and reduce the harm to the health of others. In addition, since the product itself contains tobacco, it can meet consumers' physiological needs for nicotine.

[0004] However, there are still some defects in terms of product performance and consumer experience, such as:

[0005] 1. The preheating time of tobacco stick type heat-not-burn products is long. Since the shredded tobacco filler tightly packed along the axial direction of the cigarette stick blocks the heat from the central heating plate to the peripheral tobacco filler along the radial direction of the cigarette stick, the central area of ​​the tobacco stick is fully heated, while the peripheral area far from the central heating plate is not fully heated, the heat utilization efficiency is low, and the tobacco stick is unevenly heated as a whole. In addition, since the shredded tobacco filler is tightly packed along the axial direction and the heating plate is inserted into the tobacco stick along the axial direction, there is a large resistance when inserting and removing the tobacco stick, and the heating plate is easy to break.

[0006] 2. Granular tobacco heat-not-burn products have low compatibility and can only use self-contained cigarette cartridges. The amount of smoke is small and the tobacco taste is light. Because its appearance is more like a traditional electronic cigarette, and it is quite different from a cigarette, some consumers have a low acceptance of this product. Although patents have reported tobacco granular heat-not-burn cigarettes that look similar to traditional cigarettes (CN201811489706.3, CN201811487278.0, CN201811488351.6), the main method is to add granular tobacco fillers to paper tubes to make cigarettes. The particles are loose in this type of non-rolled cigarettes. In order to prevent the particles from falling from the cigarette, a sealing device needs to be added to the end of the cigarette away from the mouthpiece (open end) to seal the particles, which not only increases the complexity of cigarette manufacturing but also poses new challenges to the high temperature resistance, sealing, and air permeability of the sealing device. The paper tube is made of multiple layers of paper bonded together, has a high hardness, and poor air permeability and heat transfer efficiency. In addition, because the cigarettes are manufactured by filling particles into empty paper tubes and cannot be manufactured through a rolling process, automated cigarette manufacturing equipment cannot be used to manufacture cigarettes in an assembly line operation.

[0007] The present invention has been proposed in order to solve the above-mentioned problems. Summary of the invention

[0008] The first aspect of the present invention provides a non-combustion cigarette manufactured based on flocking technology, the cigarette comprising: a cigarette paper layer, which is a hollow cylindrical structure, an adhesive layer is provided on the inner wall of the cigarette paper layer, and tobacco filler particles, tobacco filler filaments or tobacco filler fibers are fixedly bonded to the adhesive layer.

[0009] Here, fiber refers to a substance composed of continuous or discontinuous filaments.

[0010] The cigarette rod comprises a tobacco segment, which includes the cigarette paper layer wrapped at the outermost periphery.

[0011] Preferably, the tobacco filler particles are arranged circumferentially along the inner wall of the cigarette paper layer to form a tobacco filler particle layer, the number of the tobacco filler particle layer is at least one layer, and the number of the adhesive layer is at least one layer.

[0012] Preferably, the tobacco filler filaments or tobacco filler fibers are radially arranged along the circumference of the inner wall of the cigarette paper layer, and numerous radial channels are formed inside the cigarette paper layer.

[0013] Preferably, the interior of the cigarette paper layer is filled with the tobacco filler particles to be hollow or solid.

[0014] According to the requirements of the design size of the cigarette, particle filling rate, heating method and smoking sensory perception, the number of flocking layers and particle layout of the tobacco filler particles in the cigarette can be randomly adjusted. The particles can be arranged in a single-layer hollow arrangement, a multi-layer hollow arrangement or a multi-layer solid arrangement along the circumference of the inner wall of the cigarette. In order to form a multi-layer arrangement of particles, sizing and flocking can be repeated on a single-layer particle layer. Here, the number of flocking layers is the number of tobacco filler particle layers. Flocking here refers to flocking methods such as mechanical flocking and electrostatic flocking.

[0015] For single-layer or multi-layer hollow particle layouts, the size of the central cavity of the cigarette can be adjusted according to the width or diameter of the central heating plate or heating needle used, so that the heating plate or heating needle can be easily inserted into the central cavity of the cigarette without causing travel resistance or knocking off particles.

[0016] For multi-layer solid particle layout, peripheral heating can be used.

[0017] Preferably, when the number of the tobacco filler particle layers is greater than one layer, the tobacco filler particle layers and the adhesive layers are alternately arranged in the radial direction of the cigarette.

[0018] Preferably, the interior of the cigarette paper layer is filled with the tobacco filler shreds or tobacco filler fibers to be hollow or solid.

[0019] Preferably, one end of the tobacco filler filaments or tobacco filler fibers is fixedly bonded to the adhesive layer, and the other end extends out of the adhesive layer.

[0020] Preferably, the adhesive layer is formed by coating with an adhesive, and the adhesive is selected from emulsion (water-based) pressure-sensitive adhesives, including acrylates, natural and synthetic rubbers, and ethylene-vinyl acetate (EVA) copolymers.

[0021] Preferably, the solid solution content of the adhesive is 40wt%-65wt%.

[0022] The adhesive is low-toxic, free of organic solvents, odorless, and colorless, can be quickly bonded and cured at an appropriate temperature and can bond firmly, can well wet and penetrate porous cigarette paper, has good air permeability, and has moisture resistance, high temperature resistance, and pollution prevention properties.

[0023] Preferably, the tobacco filler shreds or tobacco filler fibers include reconstituted tobacco leaf shreds, tobacco leaf shreds, tobacco stem shreds, non-tobacco plant fibers, or non-tobacco plant shreds; and the tobacco filler particles include tobacco particles or non-tobacco plant particles.

[0024] The tobacco filler shreds, tobacco filler fibers or tobacco filler particles can be any shredded, fibrous or granular material made from any existing cigarette filler.

[0025] Cigarette fillers can be made of tobacco or non-tobacco materials.

[0026] The cigarette preparation method of the present invention comprises a flocking process and a cigarette rolling process; wherein the flocking process comprises a cloth rolling step, a glue coating step, a flocking step, a drying step, and a washing step in sequence.

[0027] The flocking step adopts electrostatic flocking, mechanical flocking, or a combination of the two to embed tobacco filler filaments, tobacco filler fibers or tobacco filler particles into the adhesive layer coated on the inner wall of the cigarette paper layer.

[0028] Flocking is a method of fixing flocking materials such as cotton, rayon, acrylic, nylon, polyester, etc. in fibrous, filamentous and granular forms on a substrate coated with an adhesive. The surfaces of various substrates such as cloth, leather, paper, plastic, glass, metal, rubber, sponge, ceramic, resin, etc. can be flocked. Flocking can be applied mechanically, electrostatically or in combination with the two. The flocking material moves toward the substrate coated with the adhesive and embeds into it under the action of static electricity or gravity. Flocking has a wide range of applications in the textile industry, handicraft industry, packaging industry, automotive industry and other fields.

[0029] The present invention has the following beneficial effects:

[0030] The present invention proposes for the first time a non-combustion cigarette manufactured based on flocking technology.

[0031] When the cigarette contains tobacco filler particles:

[0032] 1. Since the particles are firmly bonded to the adhesive on the inner wall of the cigarette paper, the tobacco filler particles will not fall out of the cigarette during the process of rolling, packaging, transportation and smoking, thus eliminating the complicated process of using a sealing device at the open end of the cigarette.

[0033] 2. Since the tobacco filling particles are flocked into the cigarette paper by the flocking process and then rolled, the latter stage of the flocking process can be seamlessly connected with the cigarette rolling process, and the flocking equipment can be directly connected to the cigarette making machine to complete the cigarette rolling, replacing the traditional non-automatic production method of using paper empty tubes to fill particles, and laying the foundation for automated production using cigarette manufacturing technology.

[0034] 3. According to the requirements of cigarette design size, particle filling rate, heating method and smoking sensory perception, the number of flocking layers and particle layout of tobacco filler particles in the cigarette can be randomly adjusted. According to the layout of particles in the cigarette, cigarettes filled with tobacco filler particles can adopt different heating methods such as central heating or peripheral heating. Regardless of whether central heating or peripheral heating is adopted, because the particles are tightly attached to the inner wall of cigarette paper or tightly bonded to each other through adhesives, and the adhesives used have good thermal stability, the filling particles are prevented from sinking to the open end of the cigarette due to adhesive failure and gravity and agglomerating and bonding together under high heating temperature during the smoking process. Therefore, this avoids changes in the filling state and layout of particles, and improves the defects of granular cigarettes such as uneven local heating, poor suction and changes in taste caused by changes in the original layout of particles during the smoking process.

[0035] 4. Since the adhesive used has good air permeability, during the heating process of the cigarette, the heat can be transmitted smoothly through the gaps between the adhesive and the particles.

[0036] When the cigarette contains tobacco filler shreds or tobacco filler fibers:

[0037] 1. The tobacco filler filaments or fibers of the present invention are arranged radially along the circumference of the cigarette to form numerous channels in the radial direction of the cigarette in the same direction as the heat propagation direction. These channels are short and straight, which greatly reduces the thermal resistance of heat propagation in the radial direction of the cigarette, and improves the defects of existing heat-not-burn cigarettes (tobacco fillers are mostly arranged axially or disorderly) such as large thermal resistance, slow heat transfer rate and uneven heating.

[0038] 2. The length and flocking density of the tobacco filler filaments or fibers of the present invention can be randomly adjusted to be suitable for cigarettes of different specifications, filling rates, heating methods and smoking requirements. Short fiber and long fiber tobacco fillers can be used as flocking raw materials to form three arrangements of short fiber hollow arrangement, long fiber hollow arrangement or long fiber solid arrangement. Regardless of whether central heating or peripheral heating is used, this type of cigarette can be adapted, and the heat propagation rate and heat utilization efficiency in the radial direction of the cigarette are greatly improved. By adjusting the length and flocking density of the fiber, the filling rate can be changed, and heating devices of different sizes can be adapted, which increases the diversity of choices for cigarette specifications and heating methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a radial cross-sectional view of a tobacco segment of a non-combustion cigarette stick with flocked tobacco filler particles in Example 1, wherein: Figure 1-1 This is a cross-sectional view of a hollow tobacco segment of a flocked single-layer tobacco filler particle in Example 1, Figure 1-2 This is a cross-sectional view of a hollow tobacco segment of flocked multi-layer tobacco filler particles in Example 1, Figure 1-3 is a cross-sectional view of a solid tobacco segment of flocked multi-layer tobacco filler particles in Example 1.

[0040] Figure 2 This is a radial cross-sectional view of a tobacco segment of a non-combustion cigarette stick with flocked tobacco filler fibers in Example 2, wherein: Figure 2-1 This is a cross-sectional view of a hollow tobacco segment of flocked tobacco filler short fibers 12 in Example 2, Figure 2-2 This is a cross-sectional view of a hollow tobacco segment of the flocked tobacco filler long fibers 13 of Example 2, Figure 2 -3 is a cross-sectional view of a solid tobacco segment of flocked tobacco filler long fibers 13 in Example 2.

[0041] List of reference numerals:

[0042] 2. Binder layer, 3. Cigarette paper layer, 11. Tobacco filler particles, 12. Tobacco filler short fibers, 13. Tobacco filler long fibers. DETAILED DESCRIPTION

[0043] The content of the present invention is further explained below through specific implementation examples.

[0044] Example 1

[0045] like Figure 1 middle Figure 1-1 As shown, a non-combustion cigarette manufactured based on flocking technology, the cigarette includes a tobacco segment, which includes the cigarette paper layer 3 wrapped at the outermost periphery. The cigarette paper layer 3 is a hollow cylindrical structure, and the inner wall of the cigarette paper layer 3 is provided with an adhesive layer 2, and tobacco filler particles 11 are fixedly bonded to the adhesive layer 2. The tobacco filler particles 11 are arranged circumferentially along the inner wall of the cigarette paper layer 3 to form a tobacco filler particle layer, the number of the tobacco filler particle layer is one layer, and the number of the adhesive layer is one layer. The interior of the cigarette paper layer 3 is filled with the tobacco filler particles 11 to be hollow. The adhesive layer 2 is coated with an adhesive, and the adhesive is selected from the emulsion (water-based) type pressure-sensitive adhesive acrylate. The solid solution content of the adhesive is 40wt%-65wt%.

[0046] like Figure 1-2 As shown, this embodiment also provides a second arrangement of the tobacco filler particle layer in the cigarette:

[0047] The number of the tobacco filler particle layers is 3, and the tobacco filler particle layers and the adhesive layer 2 are arranged alternately in the radial direction of the cigarette. The interior of the cigarette paper layer 3 is filled with the tobacco filler particles 11 to be hollow.

[0048] like Figure 1 As shown in Figure 3, this embodiment also provides a third arrangement of the tobacco filler particle layer in the cigarette:

[0049] The tobacco filler particle layer and the adhesive layer 2 are arranged alternately in the radial direction of the cigarette. The interior of the cigarette paper layer 3 is filled solid with the tobacco filler particles 11. The adhesive layer 2 coated on the tobacco filler particle layer is not shown.

[0050] like Figure 1-2 and Figure 1 As shown in Figure 3, in order to form a multi-layer arrangement of particles, sizing and flocking can be repeated on a single particle layer. The binder layer 2 coated on the tobacco filler particle layer is not shown.

[0051] Example 2

[0052] like Figure 2-1 , a non-combustion cigarette manufactured based on flocking technology, the cigarette includes a tobacco segment, which includes the cigarette paper layer 3 wrapped at the outermost periphery. The cigarette paper layer 3 is a hollow cylindrical structure, and the inner wall of the cigarette paper layer 3 is provided with an adhesive layer 2, and the adhesive layer 2 is fixedly bonded with tobacco filler fibers. The tobacco filler fibers are tobacco filler short fibers 12. In this article, the length of the short fibers 12 is 2-3.5mm. The tobacco filler fibers are radially arranged along the circumference of the inner wall of the cigarette paper layer, and countless radial channels are formed inside the cigarette paper layer. The interior of the cigarette paper layer is filled with the tobacco filler fibers to be hollow. One end of the tobacco filler fiber is fixedly bonded to the adhesive layer, and the other end extends out of the adhesive layer. The adhesive layer 2 is coated with an adhesive, and the adhesive is selected from the emulsion (water-based) type pressure-sensitive adhesive natural rubber. The solid solution content of the adhesive is 40wt%-65wt%.

[0053] like Figure 2-2 As shown, this embodiment also provides a second arrangement of the tobacco filler fibers in the cigarette: Figure 2-1 The difference is that the tobacco filler fibers are tobacco filler long fibers 13. Herein, the length of the long fibers 13 is greater than 3.5 mm.

[0054] like Figure 2 -3, this embodiment also provides a third arrangement of the tobacco filler fibers in the cigarette: Figure 2-1 The difference is that the tobacco filler fibers are long tobacco filler fibers 13. The inside of the cigarette paper layer 3 is filled with the tobacco filler fibers to be solid.

[0055] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A non-combustion cigarette manufactured based on flocking technology, characterized in that: The cigarette comprises: a cigarette paper layer which is a hollow cylindrical structure; an adhesive layer is arranged on the inner wall of the cigarette paper layer; tobacco filler filaments or tobacco filler fibers are fixedly bonded to the adhesive layer; the tobacco filler filaments or tobacco filler fibers are radially arranged along the circumference of the inner wall of the cigarette paper layer, and numerous radial channels are formed inside the cigarette paper layer.

2. The cigarette according to claim 1, characterized in that: The interior of the cigarette paper layer is filled with the tobacco filler shreds or tobacco filler fibers to be hollow or solid.

3. The cigarette according to claim 1, characterized in that: One end of the tobacco filler thread or tobacco filler fiber is fixedly bonded to the adhesive layer, and the other end extends out of the adhesive layer.

4. The cigarette according to claim 1, characterized in that: The adhesive layer is formed by coating with an adhesive, and the adhesive is selected from emulsion-type pressure-sensitive adhesives, including acrylic esters, natural and synthetic rubbers, and ethylene-vinyl acetate copolymers.

5. The cigarette according to claim 4, characterized in that: The solid solution content of the adhesive is 40wt%-65wt%.

6. The cigarette according to claim 1, characterized in that: The tobacco filler shreds or tobacco filler fibers include reconstituted tobacco leaf shreds, tobacco leaf shreds, tobacco stem shreds, or non-tobacco plant fibers or non-tobacco plant shreds.

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