Waterproof tipping paper

Abstract

The invention belongs to the technical field of tipping paper for cigarettes, and particularly relates to waterproof tipping paper which is prepared by the following steps: step 1, uniformly coating a waterproof agent on one side of tipping paper by using coating equipment, leaving the tipping paper by using the coating equipment every time when the waterproof agent passes through air holes in the tipping paper, and taking out the tipping paper after the waterproof agent passes through the air holes in the tipping paper; the coating device is in contact with the tipping paper again after crossing the air holes, and drying is performed after coating; after the cigarette is lighted and smokers smoke the cigarette, as the fiber strips separate the surface layer and the inner layer of the tipping paper to form a gap and provide an air passage for air circulation during smoking, on one hand, the water resistance of the tipping paper is kept, and the air circulation capacity is improved, so that the sufficient combustion effect of tobacco is improved, and harmful substances generated by incomplete combustion are reduced; on the other hand, the suction resistance can be reduced through an air channel formed in the middle layer, and the smooth degree of suction of the waterproof tipping paper is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cigarette tipping paper, in particular to waterproof tipping paper. Background Art

[0002] Waterproof tipping paper is a special type of paper with waterproof properties. It's typically treated with special processes (such as coating, impregnation, and lamination) to form a waterproof film on its surface or alter its internal structure, thus providing resistance to moisture penetration. This waterproof tipping paper makes the product easier to use and store in humid environments, enhancing user experience and preventing filter deformation due to moisture, which can affect the smoking experience. It also maintains the stability of the cigarette structure.

[0003] However, waterproof tipping paper enhances the water-blocking effect, and the use of high-density coatings or films will lead to a decrease in air permeability, affecting the natural circulation of smoke and changing the smoking taste, such as increased resistance to inhalation and stuffy smoke. In addition, cigarette combustion requires the participation of oxygen. A decrease in air permeability will reduce the air supply at the combustion end, resulting in incomplete combustion of tobacco, insufficient oxidation reaction, the production of carbon dioxide, water vapor, etc., and incomplete combustion. In an oxygen-deficient environment, toxic substances such as CO, aldehydes, and polycyclic aromatic hydrocarbons are generated, which aggravates the production of harmful substances. At the same time, more force is required when smoking, resulting in faster combustion speed, increased tobacco consumption per unit time, and high-concentration smoke. High-concentration smoke may be more pungent and bitter, and the irritation is increased, causing subjective discomfort to smokers. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention provides a waterproof tipping paper.

[0005] The technical solution adopted by the present invention to solve the technical problem is: the present invention provides a waterproof tipping paper, and the preparation steps of the waterproof tipping paper include: Step 1: The waterproofing agent is evenly applied to one side of the tipping paper by a coating device. Each time the coating device passes through the air holes in the tipping paper, the coating device leaves the tipping paper and contacts the tipping paper again after passing through the air holes. The coating device is dried after coating. Step 2: Prepare a coating liquid from natural wax and apply it to the vent area of ​​the tipping paper through a device to form a covering layer. After coating, it is dried to form the surface layer of the waterproof tipping paper. Step 3: Take a number of fiber strips and adhere them to the inner surface of the tipping paper surface layer to form the middle layer of the waterproof tipping paper; Step 4: Take a silk screen made of plant fiber material with a mesh size smaller than the volume of tobacco; stick the silk screen on the surface of the fiber strip away from the tipping paper to form the inner layer of the waterproof tipping paper, thus forming a waterproof tipping paper.

[0006] Preferably, in step 2, the air holes are distributed in a ring shape on the surface layer of the tipping paper, and the annularly distributed air holes are arranged in a straight line; the two sides of the tipping paper are used for bonding to form two edges of the roll, a row of air holes is located at one of the edges, and the air holes are not blocked when the two edges are bonded.

[0007] Preferably, in step three, the fiber strip of plant fiber material is in the shape of a circular frame, and the air hole is located in the middle of the fiber strip, and one end of the fiber strip is connected to the filter tip by viscose.

[0008] Preferably, in step three, the fiber strip is divided into a head portion close to the cigarette ignition end, a middle portion away from the cigarette ignition end and the filter end, and a tail portion close to the filter end. A combustion aid is added to the head portion of the fiber strip, a dispersed material that helps scatter ashes is added to the middle portion of the fiber strip, and an elastic film is connected between the tail portion of the fiber strip and the filter end.

[0009] Preferably, the combustion aid is glucose, and the method of adding the combustion aid to the head of the fiber strip is: the fiber strip is soaked in a glucose solution and then dried.

[0010] Preferably, the dispersed substance is microbeads, and the method of adding the dispersed substance to the middle part of the fiber strip is: when the middle part of the fiber strip is produced, the microbeads are stored in the fiber strip by a physical method.

[0011] Preferably, the film is annular, and one end of the film is bonded to the tail end of the fiber strip, and the other end is located between the filter tip and the tipping paper and bonded to each other.

[0012] Preferably, ventilation holes are evenly formed on the film.

[0013] Preferably, molten particles are dried and solidified in the vent holes.

[0014] Preferably, the wire mesh is made of attapulgite and plant fiber and is prepared by wire mesh forming equipment.

[0015] The beneficial effects of the present invention are as follows: 1. With the waterproof tipping paper of the present invention, after lighting a cigarette, the smoker draws on the cigarette. The fiber strips separate the surface and inner layers of the tipping paper, forming a gap that provides an airway for air circulation during inhalation. This improves air circulation while maintaining the waterproofness of the tipping paper, thereby enhancing the complete combustion of tobacco and reducing the harmful substances produced by incomplete combustion. Furthermore, the airway formed in the middle layer reduces the resistance to inhalation and improves the smoothness of inhalation through the waterproof tipping paper.

[0016] 2. The waterproof tipping paper of the present invention has a natural wax waterproofing agent with a melting point far below the burning temperature of cigarette butts. This allows the covering layer near the cigarette butt to be baked by the burning temperature of the cigarette butt, gradually melting and flowing away from the ventilation holes. The ventilation holes in the area surrounding the burned cigarette butt are not sealed by the covering layer. The air passages in the middle layer of the tipping paper, combined with the unobstructed ventilation holes, allow air to enter the cigarette from more directions when smokers inhale, promoting more complete tobacco combustion while mixing air with smoke, neutralizing the pungent feeling of the smoke and improving the smoking experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a diagram of the steps for preparing waterproof tipping paper; Figure 2 It is a three-dimensional image of waterproof tipping paper; Figure 3 It is a cross-sectional view of a waterproof tipping paper; Figure 4 It is a partial cross-sectional view of the waterproof tipping paper as viewed from the side; Figure 5 It is a partial cross-sectional view of the waterproof tipping paper film; In the figure: tipping paper 1, air holes 2, covering layer 3, fiber strips 4, silk screen 5, film 6, air holes 7. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings shown in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1:

[0021] In order to effectively solve the above problems, as shown in the accompanying drawings of the specification Figure 1-Figure 5 As shown, the waterproof tipping paper, the preparation steps of the waterproof tipping paper include: Step 1: The waterproofing agent is evenly applied to one side of the tipping paper 1 by a coating device, and the coating device leaves the tipping paper 1 each time it passes through the air holes 2 in the tipping paper 1, and contacts the tipping paper 1 again after the coating device passes through the air holes 2, and is dried after coating; Step 2: Prepare a coating liquid from natural wax and apply it to the air vents 2 in the tipping paper 1 through a device to form a covering layer 3. After coating, the coating is dried to form the surface layer of the waterproof tipping paper. Step 3: Take a number of fiber strips 4 and adhere them to the inner surface of the tipping paper surface layer to form the middle layer of the waterproof tipping paper; Step 4: Take a screen 5 made of plant fiber material with a mesh size smaller than the volume of tobacco; stick the screen 5 on the surface of the fiber strip 4 away from the tipping paper 1 to form the inner layer of the waterproof tipping paper, forming a waterproof tipping paper.

[0022] Production process: Conventional coating equipment is used to apply a conventional waterproofing agent, such as a non-toxic nano-waterproof coating, to one side of the tipping paper 1. Before coating, the tipping paper 1 is subjected to conventional laser drilling. Laser drilling of the tipping paper used to wrap tobacco is a conventional technical means to maintain air permeability. That is, the tipping paper 1 used is conventional tipping paper. During the coating process, no waterproof material is applied around the air holes 2 on the tipping paper 1, resulting in a portion of the waterproof coating on the tipping paper next to the air holes 2, followed by another portion of the waterproof coating. Then, a conventional natural wax waterproofing agent is applied to the air vents 2 on the tipping paper through a coating device to cover the air vents 2. After drying, hydrophobic paper is formed to maintain the waterproof performance of the tipping paper. Subsequently, multiple glue-coating areas are designed on the inner surface of the hydrophobic paper and glue is applied, and the fiber strips 4 are adhered and fixed to the inner surface of the hydrophobic paper. When the hydrophobic paper cigarette is in a cylindrical shape, the fiber strips 4 are evenly distributed in an annular shape on the inner surface of the hydrophobic paper. Then, harmless glue, such as maltose gum, is evenly applied to the surface of the fiber strips 4 away from the hydrophobic paper, and a silk screen 5 is adhered to the surface of the fiber strips 4 away from the hydrophobic paper. The silk screen 5 is used to wrap tobacco. The combination of the tipping paper 1, the fiber strips 4 and the silk screen 5 forms a waterproof tipping paper with a multi-layer structure with a hollow middle layer. Specifically: When not smoking, the surface of the tipping paper is coated with a waterproofing agent, which can completely block water droplets or water vapor from entering the inside of the tipping paper and contacting the tobacco, ensuring a highly effective waterproof effect. This waterproof effect means reducing the risk of water droplets dripping onto the tipping paper and causing moisture. After the cigarette is lit, the smoker draws on the cigarette, and the fiber strips 4 separate the surface layer and the inner layer of the tipping paper to form a gap, which provides an airway for air circulation during inhalation. On the one hand, while maintaining the waterproofness of the tipping paper, the air circulation capacity is improved, thereby improving the effect of full combustion of tobacco, thereby reducing the harmful substances produced by incomplete combustion; on the other hand, the airway formed in the middle layer can reduce the resistance to inhalation and improve the smoothness of inhalation of the waterproof tipping paper; and the melting point of the natural wax waterproof agent is much lower than the burning temperature of the cigarette butt, so that the covering layer 3 near the cigarette butt is baked by the burning temperature of the cigarette butt, gradually melts and flows away from the air vents 2, and the air vents 2 in the area around the burning cigarette butt will not be sealed by the covering layer 3. The airways in the middle layer of the tipping paper, combined with the unobstructed air vents 2, allow smokers to have air enter the cigarette from more directions when inhaling, promoting more complete combustion of tobacco, while mixing air and smoke, neutralizing the spiciness of the smoke, and improving the inhalation experience. Moreover, the tipping paper 1, fiber strips 4, and plant fiber mesh 5 used in this application are all easily degradable materials, which improves environmental protection. In addition, after being discarded, the tipping paper 1 can provide sufficient carbon source for microorganisms, promote the growth of microorganisms, and thus shorten the degradation time. In addition, the heat released by cigarettes burning in the absence of oxygen is mostly retained in the form of thermal energy rather than being dissipated with the airflow, which may cause the temperature of the inhaled smoke to rise by 5-10°C. If inhaled by smokers, it may harm the body for a long time. Therefore, by fully burning the tobacco, the temperature of the smoke can also be lowered.

[0023] Example 2:

[0024] Based on the first embodiment, in step 2, the air holes 2 are distributed in an annular manner on the surface layer of the tipping paper, and the annular air holes 2 are arranged in a straight line; the two sides of the tipping paper are used for bonding to form two edges of the roll, and a row of air holes 2 is located at one of the edges, and the air holes 2 are not blocked when the two edges are bonded; In step three, the fiber strip 4 made of plant fiber material is in the shape of a circular frame, and the air vent 2 is located in the middle of the fiber strip 4. One end of the fiber strip 4 is connected to the filter tip by glue.

[0025] Specifically, because the air holes 2 are annularly distributed on the surface of the tipping paper, air can be inhaled through the air holes 2 in all directions of the cylindrical cigarette during smoking, providing sufficient air for the burning tobacco, ensuring that the tobacco has sufficient air to burn, thereby improving the combustion effect. In addition, the annularly distributed air holes 2 cooperate with the airway ventilation function formed by the middle layer at the cigarette butt, allowing air to enter the interior of the airway, thereby allowing air to enter the small space formed by the airway from the large external space, without requiring much suction force, thereby increasing the air flow rate, improving the air flow rate at the cigarette butt, and providing sufficient oxygen for tobacco combustion, thereby improving the full combustion effect of the waterproof tipping paper. The cigarette is then drawn in through the central opening 2 and the air is drawn in through the central opening 2. The air is drawn in through the central opening 2 and the air is drawn in through the central opening 2. Furthermore, the air inhaled from the air passage formed in the middle layer of the tipping paper provides air for the burning area of ​​the cigarette butt, and the air vents 2 provide air for the tobacco that is about to be ignited, and the two functions work together to improve the combustion effect of the tobacco throughout the combustion process. Moreover, the fresh air entering the tobacco through the air vents 2 mixes with the smoke and moves together, which can also reduce the temperature of the smoke when it is smoked. In addition, after the tipping paper is coated with a waterproofing agent, its flexibility is improved. When the cigarette is rolled for packaging, the contact part of the covering layer 3 with the other waterproof layers may bend, or the covering layer 3 may crack when excessively bent due to natural wax. The fiber strips 4 can provide bending support for the air vents 2 on the surface of the tipping paper, thereby preventing the covering layer 3 at the air vents 2 from being cracked with the tipping paper 1 when subjected to excessive bending during the bending process, thereby affecting the waterproof performance. Furthermore, in a humid environment or after contact with water droplets, the tipping paper is affected by moisture and its flexibility will be affected; by setting up fiber strips 4, the fiber strips 4 can provide longitudinal support for the tipping paper, avoiding the tobacco part in the cigarette from being squeezed and bending or breaking; the burning speed of the prepared fiber strips 4 remains the same as the burning speed of tobacco, avoiding the fiber strips 4 burning slower than the tobacco, which causes the residual length of the fiber strips 4 to be too long.

[0026] Example 3:

[0027] Based on the second embodiment, in step 3, the fiber strip 4 is divided into a head portion close to the lit end of the cigarette, a middle portion away from the lit end of the cigarette and the filter end, and a tail portion close to the filter end. A combustion aid is added to the head portion of the fiber strip 4, a dispersed material that helps ash scattering is added to the middle portion of the fiber strip 4, and an elastic film 6 is connected between the tail portion of the fiber strip 4 and the filter end. The combustion aid is glucose, and the method of adding the combustion aid to the head of the fiber strip 4 is as follows: the fiber strip 4 is soaked in a glucose solution and then dried; The dispersed substance is micro beads, and the method of adding the dispersed substance to the middle of the fiber strip 4 is: when the middle of the fiber strip 4 is prepared, the micro beads are stored in the fiber strip 4 by a physical method, for example, by inserting the micro beads into the fiber strip 4; The film 6 is annular, and one end of the film 6 is bonded to the tail end of the fiber strip 4, and the other end is located between the filter tip and the tipping paper and bonded to each other; The adhesive used for tipping paper can be hot melt adhesive, which is based on thermoplastic polymer. It solidifies and bonds at room temperature. When heated above the softening point, it melts and loses its stickiness, and re-solidifies after cooling. Non-toxic ingredients: Commonly used base materials include ethylene-vinyl acetate copolymer, polylactic acid, paraffin-beeswax mixture, etc.

[0028] Specifically: Glucose is sprayed in the form of a solution or soaked in water and then dried and crystallized; in the early stages of combustion, glucose begins to decompose at 150-200°C, which is much lower than the temperature of lighters and cigarette butts. The heat released by the combustion of glucose provides additional fuel for the tobacco ignition stage, making the cigarette burn more stably when lit, increasing the initial combustion speed, reducing the phenomenon of "light but not ignition", preventing the tobacco from getting damp in the environment and causing difficulty in ignition, and improving the practicality of waterproof tipping paper; the smoke from the burning glucose contains trace amounts of sweet substances, such as caramel aroma, which mixes with the smoke at the beginning of ignition, improving the smoking experience and reducing the spicy feeling in the early stages of smoking; the amount of glucose added is less than 3% of the weight of the tobacco to avoid excessive addition, which leads to the generation of substances that affect smoking at high temperatures; When lighting a cigarette, the lighter flame needs to be brought close to the cigarette holder. At this time, the harmful gases produced by the burning lighter flame will be directly inhaled into the mouth and lungs as the smoker inhales. For example, a single lighting requires 3-5 seconds of inhalation, and tens of milliliters of combustion exhaust gas may be inhaled. The concentration of harmful substances depends on the completeness of combustion. If smokers habitually use their hands to shield the lighter from the wind, the lighter flame will not burn completely, and the concentration of harmful substances in the smoke will increase. For example, the combustion products of the lighter fuel may mix with the components in the cigarette smoke, such as nicotine, tar, and carbon monoxide, synergistically increasing toxicity. The CO produced by the incomplete combustion of the butane lighter flame will be superimposed on the CO in the cigarette itself, further reducing the blood's oxygen carrying capacity. Therefore, by improving the combustibility of the cigarette in the early stage of lighting, the use time of the lighter can also be reduced, reducing the inhalation of harmful substances. Furthermore, the natural wax in the tipping paper cover layer 3 is heated by the flame to form wax vapor, which further promotes the ignition of the cigarette in a humid environment. Moreover, the middle layer of the tipping paper promotes air circulation, which helps the burning of the cigarette when it is lit. In addition, because the surface layer of the tipping paper is separated from the tobacco, the surface layer of the tipping paper can be ignited, forming a short flame, reminding the smoker that the cigarette is lit, thereby reducing the use time of the lighter and reducing the inhalation of harmful substances produced by the lighter combustion. When the lighter is removed, the flame at the cigarette butt will go out and turn into smoldering. When a cigarette burns, oxygen needs to enter the combustion zone through the gaps between tobacco shreds and the filter. If ash, which mainly consists of inorganic salts and carbon particles, accumulates on the surface of the cigarette butt or in the gaps between tobacco shreds, it will block the air passages and reduce the oxygen supply. For example, in the early stages of combustion, the ash is light and loose, and the air permeability is less affected. As the ash accumulates, it forms a dense layer covering the combustion surface, hindering air flow, resulting in a decrease in the combustion rate and incomplete combustion. This may produce more harmful substances such as carbon monoxide and polycyclic aromatic hydrocarbons, and at the same time affect the taste of the smoke, such as sourness and astringency. By providing micro-beads, such as micro-beads made of non-toxic diatomaceous earth for medical use, the fiber strips 4 lose their mutual adhesion after burning and fall down under the action of the gravity of the micro-beads, taking the ashes of the burning tobacco with them. The fiber strips 4 can also increase the weight of the ashes after burning, speed up the rate of ashes falling, and avoid the clogging of cigarette butts by ashes, thereby improving the effect of the waterproof tipping paper on promoting tobacco burning. In addition, adding micro-beads to the fiber strips 4 can change the internal structure of the fiber strips 4, further reduce the mutual adhesion between the ashes of the fiber strips 4, and promote the falling of ashes. Moreover, the micropores of diatomaceous earth can absorb some tar and heavy metals through their own characteristics, thereby indirectly reducing harmful substances in the smoke. The film 6 is made of polyvinyl alcohol film 6, which has a melting point of about 180°C and is non-toxic and meets food contact standards. When exposed to the high temperature generated by the burning cigarette, it will carbonize and break up. When the cigarette is about to burn out, the carbonization and breakage of the film 6 automatically separate the discarded cigarette, tobacco, and filter, thereby increasing the contact area between the cigarette and the environment after smoking and improving the degradation efficiency. In addition, the tobacco and filter of conventional cigarettes are only wrapped by tipping paper. If the tipping paper gets damp, the rigidity of this part of the cigarette is weak and it will break if slightly squeezed, making the cigarette impossible to smoke. Therefore, by providing a film 6, the film 6 connects the fiber strip 4 and the filter, providing support for the part between the tobacco and the filter in the cigarette, thereby improving practicality. Moreover, one end of the film 6 is located between the filter and the tipping paper, and they are bonded to each other to form a protrusion, while the other connecting parts of the filter and the tipping paper are flat, so that the tipping paper forms a protrusion at the cigarette mouth. When holding the cigarette, the smoker clamps the hand on the tipping paper protrusion, forming a mutually pressed contact state. The protrusion improves the contact stability between the hand and the tipping paper, thereby avoiding the hand sliding on the cigarette when smoking, causing the hand to be burned near the cigarette butt or the cigarette to slip.

[0029] Example 4:

[0030] On the basis of the third embodiment, the film 6 is evenly provided with ventilation holes 7; The molten particles are dried and solidified in the vent holes 7; The wire mesh 5 is made of attapulgite and plant fiber and is prepared by a wire mesh 5 forming device; the addition or preparation technology in this application is a conventional production technology; and the burning rate of the waterproof tipping paper and the tobacco is kept the same; Specifically, by providing the ventilation holes 7, air can freely pass through the film 6, thereby increasing the air permeability of the film 6 and reducing the resistance to inhalation. In addition, since the molten particles are dried and solidified in the ventilation holes 7, the molten particles gradually liquefy and flow away as the smoke temperature increases. Opening the ventilation holes 7 improves the air permeability of the film 6, making the cigarette easier to draw in the middle of the puff. The type of molten particles, such as triethyl citrate, is an esterification product of citric acid and ethanol with a melting point of -40°C. However, because industrial-grade products are often crystalline, they are solid at room temperature and melt into a transparent liquid above 50°C, with good volatility and safety. After the smoke passes through the film 6 and the air vents 7, the triethyl citrate is melted and partially volatilized into the smoke, which can enhance the diffusivity of the smoke taste, such as enhancing mint flavor or tobacco flavor. At the same time, its ester structure can capture free radicals in the smoke and reduce oxidative damage. In addition, the liquid triethyl citrate flows down from the air vents 7 into the filter tip, filling the micropores in the filter tip, and utilizing the thermal sensitivity of the material to achieve a reversible change in the pore switch: Low temperature (when not inhaled): The material is in liquid or low-viscosity state, filling the filter pores without blocking the pores, maintaining stable filter permeability and ensuring smooth smoke flow when the cigarette is stored statically; High temperature (when the cigarette butt is close to the filter): The high temperature generated by smoking causes the material to expand or change phase, such as from liquid to semi-solid or gel. After the volume increases, part of the material blocks the micropores in the filter, reducing the air permeability of the filter and reducing the amount of smoke inhaled per unit time. This prevents the smoker from inhaling excessive amounts of high-temperature smoke instantly, which aggravates respiratory damage. In combination with the above-mentioned function of improving the air permeability during smoking, this effect is promoted, thereby improving the smoking effect. The composition of the wire mesh 5 includes, for example, plant fiber paper, made from softwood or hardwood pulp, pure cellulose, without adhesives or additives. Combustion behavior: After combustion, loose, porous ash is formed, which is light gray and easily falls off due to gravity or suction airflow. Attapulgite, a hydrous magnesium aluminum silicate mineral with a fibrous crystal bundle structure, a pore diameter of 2-5 nm, and a specific surface area of ​​100-200 m² / g. The principle of smoke adsorption: chemical adsorption plus physical retention. The hydroxyl groups on the surface of the attapulgite form hydrogen bonds with acidic substances in the smoke, simultaneously capturing particulate matter and reducing the content of harmful substances in the smoke. Ash skeleton support: The fibrous structure supports the ash to form a porous network, reducing adhesion and allowing the burned ash to fall easily. Furthermore, the wire mesh 5 can absorb moisture from the tobacco, preventing excessive moisture from causing incomplete combustion. When the wire mesh 5 burns, the mineral fibers and tobacco ash are interwoven to form a rigid skeleton, the bending strength of the ash is reduced, and the ash that absorbs harmful substances falls off, reducing the amount that enters the filter. Through the bamboo charcoal fibers in the attapulgite and plant fibers, the dual goals of harmful substance absorption and easy ash falling can be achieved simultaneously. The porous structure of the material is used to capture pollutants, and the rigid particles are used to destroy the sticky structure of the ash, thereby promoting the full combustion of waterproof cigarettes.

[0031] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Waterproof tipping paper, characterized in that: The preparation steps of the waterproof tipping paper include: Step 1: The waterproofing agent is evenly applied to one side of the tipping paper (1) by a coating device, and each time the coating device passes through the air holes (2) in the tipping paper (1), the coating device leaves the tipping paper (1), and contacts the tipping paper (1) again after the coating device passes over the air holes (2), and is dried after coating; Step 2: preparing a coating liquid from natural wax and applying it to the air vents (2) in the tipping paper (1) through a device to form a covering layer (3), which is then dried after coating to form a surface layer of the waterproof tipping paper; Step 3: Take a number of fiber strips (4) and adhere them to the inner surface of the tipping paper surface layer to form a middle layer of the waterproof tipping paper; Step 4: Take a silk screen (5) made of plant fiber material, and the mesh size of the silk screen (5) is smaller than the volume of the tobacco; stick the silk screen (5) on the surface of the fiber strip (4) away from the tipping paper (1) to form the inner layer of the waterproof tipping paper, thereby forming a waterproof tipping paper.

2. The waterproof tipping paper according to claim 1, characterized in that: In step 2, the air holes (2) are distributed in an annular shape on the surface layer of the tipping paper, and the annularly distributed air holes (2) are arranged in a straight line; the two sides of the tipping paper are used for bonding to form two edges of the roll, a row of air holes (2) is located on one of the edges, and the air holes (2) are not blocked when the two edges are bonded.

3. The waterproof tipping paper according to claim 1, characterized in that: In step three, the fiber strip (4) made of plant fiber material is in the shape of a circular frame, and the air vent (2) is located in the middle of the fiber strip (4), and one end of the fiber strip (4) is connected to the filter tip by glue.

4. The waterproof tipping paper according to claim 3, characterized in that: In step three, the fiber strip (4) is divided into a head portion close to the cigarette ignition end, a middle portion away from the cigarette ignition end and the filter end, and a tail portion close to the filter end. A combustion aid is added to the head portion of the fiber strip (4), a dispersed material that helps ash scatter is added to the middle portion of the fiber strip (4), and an elastic film (6) is connected between the tail portion of the fiber strip (4) and the filter end.

5. The waterproof tipping paper according to claim 4, characterized in that: The combustion aid is glucose, and the method of adding the combustion aid to the head of the fiber strip (4) is as follows: the fiber strip (4) is soaked in a glucose solution and then dried.

6. The waterproof tipping paper according to claim 4, characterized in that: The dispersed substance is microbeads, and the method for adding the dispersed substance to the middle part of the fiber strip (4) is: when the middle part of the fiber strip (4) is prepared, the microbeads are stored in the fiber strip (4) by a physical method.

7. The waterproof tipping paper according to claim 4, characterized in that: The film (6) is annular, and one end of the film (6) is bonded to the tail end of the fiber strip (4), and the other end is located between the filter tip and the tipping paper and bonded to each other.

8. The waterproof tipping paper according to claim 7, characterized in that: The film (6) is evenly provided with ventilation holes (7).

9. The waterproof tipping paper according to claim 8, characterized in that: Melted particles are dried and solidified in the vent holes (7).

10. The waterproof tipping paper according to claim 1, characterized in that: The wire mesh (5) is made of attapulgite and plant fibers and is prepared by wire mesh (5) forming equipment.

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