A tubular cooling pipe fitting for heating non-combustible cigarettes and its preparation method

Abstract

The present invention discloses a cooling tube for heating non-burning cigarettes, which comprises a tube wall and a tube cavity. The tube wall of the cooling tube comprises an inner composite layer (21) and an outer first paper layer (22). The composite layer (21) comprises a non-woven fabric layer (211) and a second paper layer (212), and the second paper layer (212) is bonded to the first paper layer (22). The present invention firstly compounds the non-woven fabric layer (211) and the second paper layer (212) by a dry compounding method, and then bonds the second paper layer (212) and the first paper layer (22). The paper materials are easier to bond, so that different materials of the tube wall are firmly bonded, and the innermost non-woven fabric layer is not easy to fall off, which solves the problem that multiple materials are difficult to bond. Furthermore, in the preparation process of the tube, spiral composite rolling can be used or the overlapping process can be used for rolling, and the rolling method is more flexible.

Description

Technical Field

[0001] The invention relates to the field of heat-not-burn cigarettes, and in particular to a cigarette stick used for heat-not-burn cigarettes. Background Art

[0002] Heat-not-burn cigarettes use an external heat source to heat tobacco sheets. The tobacco is only heated without burning to release smoke and nicotine. The tobacco temperature is much lower than traditional cigarettes, which can reduce the harmful components produced by high-temperature combustion and decomposition of tobacco. The harmful chemical components and toxicity of the smoke are greatly reduced. At the same time, sidestream smoke is greatly reduced, reducing the harm of secondhand smoke to non-smoking people.

[0003] The temperature of tobacco heated by heat-not-burn cigarettes is generally controlled below 400℃, and the atomization temperature is reached at 250℃ to 350℃. The temperature of the high-temperature atomized smoke entering the oral cavity through the filter segment is higher than that of traditional cigarette smoke. Developing a cigarette structure with suitable smoke temperature and sufficient smoke release is the key to electric heating heat-not-burn cigarettes.

[0004] At present, in the prior art, heat-not-burn cigarettes all use a multi-segment filter rod to process the smoke generated by the core segment, and the filter rod includes a cooling segment and a filter segment. In order to reduce the resistance of the cooling segment to the smoke and avoid deformation of the cooling segment due to heat, which causes the cooling segment to collapse, thereby affecting the supporting performance of the cooling segment to the cigarette, some cigarettes use paper tubes as the cooling segments. In order to improve the cooling effect of the paper tube, a layer of polylactic acid film can be added to the inner wall of the paper tube. In the prior art, the bonding of the inner wall polylactic acid film and the outer wall material is performed when the paper tube is formed. That is, in the process of rolling to form a paper tube, the polylactic acid film and the paper material are bonded. The problems of this method are: 1. The bonding between the paper material and the polylactic acid film is not strong. During use, the polylactic acid film will fall off the pipe due to heat deformation, thereby retaining part of the smoke, resulting in low smoke throughput and small smoke volume; 2. During the rolling process, the paper material and the polylactic acid film are not easy to bond at the interface, so the rolling process can only be carried out in a spiral forming method that is easy to buckle, and the overlapping method that is not easy to buckle cannot be used. However, the spiral composite forming efficiency is low and the scrap rate is high. 3. In addition to the cooling and supporting functions, the existing paper tubes are difficult to achieve functions such as carrying fragrance or the effect is not good.

[0005] In order to solve the above problems, the present invention is proposed. Summary of the invention

[0006] The present invention provides a tubular cooling pipe for heating non-burning cigarettes, which includes a pipe wall and a pipe cavity. The pipe wall of the tubular cooling pipe includes an inner composite layer 21 and an outer first paper layer 22. The composite layer 21 includes a non-woven fabric layer 211 and a second paper layer 212. The second paper layer 212 is bonded to the first paper layer 22. The inner layer of the pipe wall is the side close to the pipe cavity. The pipe in the present application document is the tubular cooling pipe or cooling pipe.

[0007] Preferably, a metal foil layer 213 or a polymer material film 214 is further provided between the non-woven fabric layer 211 and the second paper layer 212. Overlapping one or more of the non-woven fabric layer, the second paper layer, the metal foil layer 213 or the polymer material film 214 to form a composite layer 21 can significantly improve the supporting performance of the pipe wall.

[0008] Preferably, the non-woven fabric layer 211 is a non-woven fabric made of a polymer material, and the polymer material is polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate or polylactic acid.

[0009] Among them, the short fibers or filaments of the polymer material are oriented or randomly arranged to form a fiber mesh structure, and then reinforced by mechanical, thermal bonding or chemical methods to form a polymer non-woven fabric layer, while the polymer material is formed by blow molding, cast film or biaxial stretching method is called polymer film 214. The polymer non-woven fabric layer is an opaque material with a grid-like surface, which is soft, tough, and has holes on the surface. The polymer film 214 is a transparent material with a smooth surface. Compared with non-woven fabrics, it has a harder texture, poorer toughness, and no holes on the surface.

[0010] Preferably, the non-woven fabric layer 211 has one or both of a flavoring gel layer and a smoke-generating agent layer on a side close to the lumen.

[0011] The flavoring gel layer is selected from a polyethylene glycol layer or a flavor layer; the smoke generating agent layer is selected from a propylene glycol layer or a glycerin layer.

[0012] Preferably, the wall thickness of the pipe is 0.4-1 mm.

[0013] Preferably, the mass of the composite layer 21 is 160 g per square meter, the mass of the first paper layer 22 is 110 g per square meter, and the mass of the second paper layer 212 is 60 g per square meter.

[0014] A second aspect of the present invention provides a method for preparing the cooling pipe fitting, which comprises the following steps:

[0015] (1) Compounding the non-woven fabric layer 211 and the second paper layer 212 to obtain a composite layer 21, wherein one side of the composite layer 21 is the non-woven fabric layer 211, and the other side is the second paper layer 212;

[0016] (2) Lay one side of the second paper layer 212 of the composite layer 21 on the first paper layer 22, and form the tube by spiral rolling or lap rolling.

[0017] The rolling process may be performed along the edge of the sheet formed by the complete overlap of the inner wall and the outer wall, or may be performed along the angular spiral of the sheet formed by the partial overlap of the inner wall and the outer wall.

[0018] Preferably, the compounding method in step (1) is dry compounding.

[0019] The third aspect of the present invention provides a heat-not-burn cigarette, which comprises, from upstream to downstream, a cigarette core section 1, a cooling section 2 and a filter section 3; the cooling section 2 is the tubular cooling pipe member described in the first aspect of the present invention;

[0020] The cooling section 2 and the filter section 3 are wrapped by forming paper 4 to form a binary composite mouthpiece, the cigarette core section 1 is wrapped by cigarette paper 5 to form a tobacco section, and the binary composite mouthpiece and the tobacco section are tipped by tipping paper 6 to form a cigarette.

[0021] Wherein, the material of the cooling section 2 is paper or a composite material containing non-woven fabrics.

[0022] The filter segment 3 is a solid filter formed by acetate fiber bundle, polylactic acid bundle or bundle of acetic acid and polylactic acid mixed in proportion.

[0023] The cigarette core segment 1 is a rod-shaped cigarette core formed by gathering tobacco leaves or reconstituted tobacco leaves containing aromatic substances.

[0024] The cooling section 2 overlaps the inner wall material polymer non-woven fabric layer with one or more layers of the outer wall material polymer non-woven fabric layer, paper layer, metal foil layer 213 or polymer film 214 to form an empty tube, which can significantly improve the supporting performance of the tube wall.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the pipe wall of the present invention, the non-woven fabric layer 211 first forms a composite layer 21 with the second paper layer 212, so that one side of the composite layer 21 is the non-woven fabric layer 211 and the other side is the second paper layer 212. When the composite layer 21 is bonded to the first paper layer 22 to form the pipe, one side of the second paper layer 212 of the composite layer 21 is attached to the first paper layer 22. Since the non-woven fabric layer 211 and the second paper layer 212 are compounded by a dry compounding method, the two are firmly bonded and not easy to fall off. The composite layer 21 is attached to the first paper layer 22 by bonding the second paper layer 212 to the first paper layer 22, and the paper materials are easier to bond, so that the different materials of the pipe wall are firmly bonded, and the innermost non-woven fabric layer is not easy to fall off, which solves the problem of multiple materials being difficult to bond. Furthermore, the spiral composite rolling method or the overlapping process can be used for rolling in the preparation process of the pipe, and the rolling method is more flexible.

[0027] 2. In a preferred embodiment of the present invention, a flavoring gel layer or a smoke-generating agent layer can be added to the inner wall of the cooling section 2 of the cigarette of the present invention. The inner layer of the tube wall is a non-woven fabric layer 211. The surface of the non-woven fabric layer 211 has fine holes, so the non-woven fabric layer has a large aroma or smoke-generating amount and better releases aroma substances or smoke-generating substances. At the same time, the process of adding a flavoring gel layer or a smoke-generating agent layer to the cigarette of the present invention can be completed during the preparation of the cooling section 2, thereby avoiding the need to separately add a flavoring gel layer or a smoke-generating agent layer after the preparation of the cooling section 2 of the cigarette, thereby simplifying the process.

[0028] 3. In a preferred embodiment of the present invention, a metal foil layer 213 or a polymer material film 214 is further provided between the non-woven fabric layer 211 and the second paper layer 212. When a flavoring gel layer or a smoke-generating agent layer is added to the inner surface of the non-woven fabric layer 211, since a metal foil layer 213 or a polymer material film 214 is further provided between the non-woven fabric layer 211 and the second paper layer 212, the flavoring gel layer or the smoke-generating agent layer is not easy to penetrate into the second paper layer 212, thereby avoiding the loss of the flavoring gel or the smoke-generating agent, thereby maximizing its effect and also avoiding the production and processing problems caused by the penetration of the flavoring gel layer or the smoke-generating agent layer.

[0029] 4. In a preferred embodiment of the present invention, the tube wall of the cooling section 2 of the cigarette of the present invention is an overlapping layer or layers of a non-woven fabric layer 211, a second paper layer 212, a metal foil layer 213 and a polymer material film 214, which can significantly improve the supporting performance of the tube wall of the cooling section 2 for the cigarette.

[0030] 5. The inner layer of the tube wall of the cooling section 2 of the cigarette of the present invention is a non-woven fabric layer 211. The non-woven fabric layer of the polymer material is made of polylactic acid material, polyethylene material, polypropylene material, polyvinyl chloride material or polyethylene terephthalate material, which can significantly reduce its thermoplasticity, making it less likely to deform when heated, thereby avoiding the cooling section 2 from collapsing after being heated.

[0031] 6. The production process of the cooling section 2 of the present invention is simpler than that of using a gathered polylactic acid film as the cooling section, and the cost can be greatly reduced. At the same time, the cooling effect of the cooling section 2 of the present invention and the cooling effect of using a gathered corrugated polylactic acid sheet as the cooling section of the same length on the flue gas is almost the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of a pipe fitting according to a first embodiment of the present invention;

[0033] Figure 2 A partial structural diagram of a pipe wall of a pipe fitting according to a first embodiment of the present invention;

[0034] Figure 3 A schematic structural diagram of a pipe fitting according to a second embodiment of the present invention;

[0035] Figure 4 A partial structural diagram of a pipe wall of a pipe fitting according to a second embodiment of the present invention;

[0036] Figure 5 A structural diagram of a cigarette according to a third embodiment of the present invention;

[0037] In the accompanying drawings, the reference numerals are as follows: 1 - cigarette core segment, 2 - cooling segment, 3 - filter segment, 4 - shaping paper, 5 - cigarette paper, 6 - tipping paper, 21 - composite layer, 22 - first paper layer, 211 - non-woven fabric layer, 212 - second paper layer, 214 - polymer material film. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or substitutions made based on the teachings of the present invention belong to the protection scope of the present invention.

[0039] Example 1

[0040] This embodiment prepares a pipe for heating non-burning cigarettes, and the specific method is as follows:

[0041] (1) A layer of nonwoven fabric is dry-laminated with a second paper material having a basis weight of 60 g / m2 by a WRJi9 series solvent-free laminating machine to obtain a composite layer having a basis weight of 160 g / m2.

[0042] (2) The laminated composite layer roll is cut into small rolls with a width of 12 mm.

[0043] (2) The composite layer and two rolls of the first paper material with a basis weight of 110 g / m2 are formed into a tube by a spiral tube making machine, and the fragrance gel is coated on the non-woven fabric surface of the composite layer by a roller transfer method during the forming process.

[0044] The thickness of the formed pipe wall is 0.6 mm. The short fibers of the polylactic acid material are oriented to form a fiber mesh structure, and then the polylactic acid non-woven fabric layer is reinforced by a thermal bonding method.

[0045] like Figure 1 As shown, reference numeral 21 is a composite layer, reference numeral 22 is a first paper layer, reference numeral 211 is a nonwoven fabric layer, and reference numeral 212 is a second paper layer.

[0046] Example 2

[0047] This embodiment prepares a pipe for heating non-burning cigarettes, and the specific method is as follows:

[0048] (1) A layer of non-woven fabric and a layer of PLA film are dry-laminated by a WRJi9 series solvent-free laminating machine. After lamination, the PLA film surface is dry-laminated with a second paper material with a weight of 60g / ㎡ to form a composite layer, wherein one side of the composite layer is the non-woven fabric, the other side is the second paper material, and the middle is the PLA film.

[0049] (2) Spray the fragrance-carrying gel onto the non-woven fabric surface of the composite layer.

[0050] (3) The composite layer coated with the fragrance-carrying gel and the first paper strip with a weight of 110 g / m2 are made into a pipe by a method of overlapping composite forming pipes.

[0051] The thickness of the formed fragrance-carrying nonwoven fabric pipe is 0.6 mm. The short fibers of the polylactic acid material are oriented to form a fiber mesh structure, and then the polylactic acid nonwoven fabric layer is reinforced by a hot bonding method.

[0052] like Figure 4 As shown, the inner wall of the formed non-woven fabric tube is non-woven fabric, reference numeral 21 is a composite layer, reference numeral 22 is a first paper layer, reference numeral 211 is a non-woven fabric layer, reference numeral 212 is a second paper layer, and 214 is a polymer material film PLA film.

[0053] Example 3

[0054] This embodiment is a heat-not-burn cigarette, which comprises: a cigarette core segment 1, a cooling segment 2 and a filter segment 3 in sequence;

[0055] The cooling section 2 is the pipe prepared in Example 2.

[0056] The cooling section 2 and the filter section 3 are wrapped by forming paper 4 to form a binary composite mouthpiece, the cigarette core section 1 is wrapped by cigarette paper 5 to form a tobacco section, and the binary composite mouthpiece and the tobacco section are tipped by tipping paper 6.

[0057] The length of the temperature-lowering section 2 is 24 mm.

[0058] The filter segment 3 is a solid filter made of acetate fiber bundle material, and the length of the filter segment 3 is 8 mm.

[0059] The core segment 1 is a rod-shaped core formed by gathering reconstituted tobacco leaves containing flavor substances. The core segment 1 is 13 mm long and 7.2 mm in diameter.

Claims

1. A cooling pipe for heating non-burning cigarettes, comprising a pipe wall and a pipe cavity, characterized in that: The wall of the cooling pipe comprises an inner composite layer (21) and an outer first paper layer (22), the composite layer (21) comprises a non-woven fabric layer (211) and a second paper layer (212), and the second paper layer (212) is bonded to the first paper layer (22); A metal foil layer (213) or a polymer material film (214) is further provided between the non-woven fabric layer (211) and the second paper layer (212); The mass of the composite layer (21) is 160 g per square meter, the mass of the first paper layer (22) is 110 g per square meter, and the mass of the second paper layer (212) is 60 g per square meter.

2. The cooling pipe fitting according to claim 1, characterized in that: The non-woven fabric layer (211) is a non-woven fabric made of a polymer material, and the polymer material is polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate or polylactic acid.

3. The cooling pipe fitting according to claim 1, characterized in that: The non-woven fabric layer (211) has one or both of a flavoring gel layer and a smoke-generating agent layer on a side close to the tube cavity.

4. The cooling pipe fitting according to claim 1, characterized in that: The wall thickness of the cooling pipe is 0.3mm-1mm.

5. A method for preparing the cooling pipe according to claim 1, characterized in that: It includes the following steps: (1) Compounding the non-woven fabric layer (211) and the second paper layer (212) to obtain a composite layer (21), wherein one side of the composite layer (21) is the non-woven fabric layer (211), and the other side is the second paper layer (212); (2) Laying one side of the second paper layer (212) of the composite layer (21) to the first paper layer (22), and forming the tube by spiral rolling or lap rolling.

6. The preparation method according to claim 5, characterized in that: The compounding method in step (1) is dry compounding.

7. A heat-not-burn cigarette, characterized in that: From upstream to downstream, it comprises: a cigarette core section (1), a cooling section (2) and a filter section (3); the cooling section (2) is the cooling pipe according to claim 1; The cooling section (2) and the filter section (3) are wrapped with forming paper (4) to form a dual composite mouthpiece, the tobacco core section (1) is wrapped with cigarette paper (5) to form a tobacco section, and the dual composite mouthpiece and the tobacco section are connected by tipping paper (6) to form a cigarette.

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