Low-adsorption type cooling filter stick and application thereof

Abstract

The invention discloses a low-adsorption type cooling filter stick and application thereof. The filter stick is formed by wrapping a filter stick core with high-air-permeability forming paper. The filter stick core is formed by splicing a paper tube section and an acetate fiber section; a plurality of small holes are evenly distributed in the surface of the paper tube section along the circumference. The interior of the filter stick is hollow, no suction resistance exists, almost no smoke is adsorbed, and the larger suction smoke amount can be provided. The cooling filter stick is simple in structure, environment-friendly, low in cost and easy to realize industrial continuous production. When the filter stick is applied to heating the cigarette filter stick, the temperature of taste smoke can be effectively reduced, and the smoke concentration can be kept as much as possible.

Description

Technical Field

[0001] The invention relates to a low-adsorption cooling filter rod, in particular to an adsorption cooling filter rod comprising a pre-punched paper tube and a breathable forming paper, and the application of the low-adsorption cooling filter rod in a heating cigarette filter rod, belonging to the technical field of cigarette production. Background Art

[0002] Heated cigarettes are a new type of tobacco product. Generally, heating elements are used to heat tobacco products to produce smoke. Tobacco and other flavor components are usually released at around 300°C. The high-temperature aerosol enters the mouth directly after passing through the filter. When the current heated cigarettes are smoked in the heater, generally only part of the filter section is exposed, and most of the research is inside the heater. If the temperature cannot be effectively reduced, it is easy to cause the smoke temperature to be too high, resulting in a poor smoking experience. At the same time, the smoke provided by heated cigarettes when smoking is mainly atomized components such as water and glycerin. Compared with traditional cigarettes, there are already problems such as small smoke volume and low smoke concentration. The high adsorption performance of conventional filter rods will further reduce consumers' satisfaction.

[0003] In the prior art, a multi-segment cigarette design is generally used to cool down the hot smoke generated by the cigarette core segment. For example, Philip Morris International uses PLA film fiber tubes for cooling. However, due to its poor thermodynamic properties, it is easy to produce thermal contraction or collapse when heated. At the same time, condensation adsorption is inevitably produced when aerosol passes through, which limits its application to a certain extent. Another way is to use ventilation to cool down. For example, British American Tobacco uses paper hollow mouthpieces and domestic tobacco companies use acetate fiber hollow tube filters. They are perforated and ventilated to reduce the smoke temperature. However, this method has the problem that the perforation cannot be penetrated, resulting in too high a smoke temperature. In addition, the outside air directly enters the hollow tube through the ventilation holes, and the airflow speed is fast, the contact area between air and smoke is limited, and the mixing is uneven, which reduces the suction quality. The acetate fiber hollow tube filter rod will produce a large adsorption of the aerosol, resulting in insufficient smoke volume, and the near-smoke end will also produce thermal collapse and deformation due to excessive temperature, affecting the user experience. Summary of the invention

[0004] In view of the problems in the prior art that when heated cigarettes are smoked, the smoke temperature is too high, causing a burning sensation in the consumer's mouth, and when cooling films or acetate fiber hollow tubes are perforated for ventilation and dilution, the smoke concentration is low, resulting in a poor smoking experience, the first purpose of the present invention is to provide a cigarette filter rod that can effectively reduce the mouth-feeling smoke temperature and maintain the smoke concentration. The material has the characteristics of simple form, easy production, degradable and low cost, and good cooling effect.

[0005] The second object of the present invention is to provide an application of a low-adsorption cooling filter rod, which is applied to a heated cigarette filter rod to provide a better suction smoothness and a larger amount of smoke.

[0006] In order to achieve the above technical objectives, the present invention provides a low-adsorption cooling filter rod, which is composed of a filter rod core wrapped with high-permeability molding paper; the filter rod core is spliced ​​by a paper tube segment and a acetate fiber segment; the surface of the paper tube segment has a number of small holes evenly distributed along the circumference.

[0007] In the technical solution of the present invention, the base paper of the rolled paper tube has been pre-punched, and the aperture is much larger than that of conventional online laser punching. There is no problem that the laser punching cannot penetrate during production, and the breathable forming paper part wrapped on the outside can slow down the speed of cold air entering the hollow tube, so that the cold air and smoke are mixed more evenly, which can improve the suction quality; plus the quantitative base paper constituting the paper tube has a smooth surface, the inside is transparent and there is no resistance to suction, and the adsorption of smoke is extremely low, which can provide users with a better sense of smooth suction and a larger amount of smoke; furthermore, the larger area of ​​ventilation holes on the wall of the paper tube will partially hinder the conduction of the high-temperature smoke filter rod wall to the lip end, which can reduce the burning pain of the user's lips when sucking. Therefore, the present invention can maximize the ventilation of the filter tip to reduce the smoke temperature by using the pre-punched paper tube and breathable forming paper, and at the same time, the high adsorption of the hollow acetate fiber segment is used to ensure the amount of smoke when smoking.

[0008] As a preferred solution, the outer diameter of the paper tube segment is the same as that of the acetate segment.

[0009] As a preferred solution, the paper tube segment is made of 50-120g / m 2 The base paper with appropriate quantitative basis weight can provide sufficient support and paper tube hardness for the spiral breathable paper tube, so as to meet the needs of filter rod production.

[0010] As a preferred solution, the small holes on the surface of the paper tube segment are evenly distributed within the range of 5 to 15 mm from the acetate segment. Since the lengths of the acetate segment and the entire filter rod are limited, the tobacco needs to be inserted into the smoking device for inhalation when heating the tobacco, and a part of the filter rod is generally inserted into the smoking device. To ensure the cooling effect, the ventilation holes must be exposed. Therefore, the small holes cannot be too far away from the acetate segment. If they are too close, the lips may touch and block the ventilation holes during inhalation, and the cooling effect is also weak.

[0011] As a preferred solution, the number of small holes on the surface of the paper tube segment is 2 to 4. The number of holes on the paper tube segment has a direct impact on the ventilation and cooling of the filter rod. When the number of holes is too low, the cooling effect of the filter rod is poor, which will cause a burning sensation on the lips of consumers; too many holes will lead to excessive ventilation and too small suction resistance, with a sense of emptying and reduced smoke volume; in addition, too many holes will reduce the strength of the paper tube and fail to form a supporting force.

[0012] As a preferred solution, the small holes are circular holes with an aperture range of 1.5 to 4.0 mm, or elliptical holes, diamond holes, rectangular holes or other irregular holes of equal area. The diameter of the small holes is a key factor in controlling the smoke volume and temperature of the filter. The diameter of the pre-punched holes in the present invention is much larger than that of conventional online laser punching. The appropriate aperture can ensure that the ventilation is controlled at an appropriate level, so that both the cooling and the smoke volume are maintained at a good level. If the aperture is too small, insufficient ventilation will result in too high a smoke temperature and a small amount of smoke. If the aperture is too large, on the one hand, the strength of the paper tube will be greatly weakened, affecting its use. On the other hand, it will lead to excessive ventilation, a sense of evacuation and a reduction in smoke volume. A circular hole is further preferred.

[0013] As a preferred solution, the acetate segment is composed of a tow with a single denier greater than 20.0tex. The acetate segment tow of the present invention is composed of diacetyl filaments, has a large specific surface area, and has a good adsorption and interception effect on harmful components in cigarette smoke. The main components of heated smoke are glycerin and water, which are easy to condense. In order to ensure the amount of smoke from smoking, the filter rod adsorption must be low. The higher the single denier of the acetate segment tow, the lower the adsorption. When using a lower single denier tow, the smoke volume will be lower.

[0014] As a preferred solution, the tow is composed of acetate fiber, which is a regenerated cellulose fiber with good moisture absorption and adsorption properties. The cross-sectional shape of the acetate fiber is Y-shaped, and the fiber has a large specific surface area, which has a good adsorption and interception effect on harmful components in cigarette smoke.

[0015] As a preferred solution, the length ratio of the paper tube segment and the acetate fiber segment when spliced ​​is (30-23):7. On the one hand, the extensive use of spiral breathable paper tubes can provide more breathable zones and lower suction resistance, so that its cooling and low adsorption performance can be exerted to a greater extent. On the other hand, the use of the minimum length of the acetate fiber segment can ensure the production needs of the filter rod under current industrial conditions while reducing the adsorption of smoke by the filter rod as much as possible.

[0016] As a preferred solution, the air permeability of the highly air-permeable wrapping paper is 6000-26000 CU. The air permeability of the highly air-permeable wrapping paper is another key factor in controlling the smoke volume and temperature of the filter tip. By controlling the air permeability of the wrapping paper, on the one hand, the speed at which smoke and external cold air enter the hollow tube can be controlled, thereby controlling the speed at which smoke cools. At the same time, as cold air enters, it can be mixed more evenly with the smoke, thereby improving the suction quality. More preferably, it is 12000-26000 CU. Too low air permeability makes it difficult to achieve a cooling effect, while too high air permeability increases the cost of the filter rod.

[0017] As a preferred solution, the rolling method is one of roll bonding or spiral rolling bonding, and the bonding overlap width is 1 to 2 mm.

[0018] The second object of the present invention is to provide an application of a low-adsorption cooling filter stick, which is applied to the preparation of heated cigarettes, and has the advantages of large smoke volume and low suction temperature, and can bring better smoking experience to users.

[0019] As a preferred solution, the low-adsorption cooling filter rod is combined with a cigarette rod to form a heating cigarette.

[0020] As a preferred solution, the tipping paper of the cooling filter rod used for heating cigarette filter rods is fully self-permeable tipping paper or pre-punched tipping paper. The perforated tipping paper is pre-punched tipping paper, and the punching position coincides with the center position of the hole on the paper tube wall. Preferably, the total number of punching holes on the tipping paper is 1 to 20.

[0021] As a preferred solution, when the adsorption-type cooling filter rod is connected to make cigarettes, the empty paper tube is close to the smoking section, and the tow section is close to the lip end.

[0022] Compared with the prior art, the technical solution of the present invention has the following beneficial technical effects:

[0023] 1) The adsorption type cooling filter rod of the present invention has a hollow paper tube as its main body, and the interior is transparent and does not produce suction resistance. The smoke contact surface is small, and the smoke adsorption is extremely low. The hollow acetate fiber section with strong adsorption can provide a better suction smoothness and a larger amount of smoke.

[0024] 2) The low-adsorption cooling filter rod of the present invention is simple in form, easy to produce, degradable and low in cost.

[0025] 3) The present invention can achieve a better cooling effect through the pre-punched paper tube and the high-permeability forming paper, and enable it to have a fragrance adding function. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic cross-sectional view of the filter rod core of the present invention, Figure 1 In the figure, 1-paper tube section, 2-pre-punched holes on the paper tube, 3-acetate section. DETAILED DESCRIPTION

[0027] The following description describes an optional embodiment of the present invention to teach those skilled in the art how to implement and reproduce the present invention. In order to teach the technical solution of the present invention, some conventional aspects have been simplified or omitted.

[0028] Example 1

[0029] In this embodiment:

[0030] Pre-punched, 65g / m2 The base paper is rolled into a paper tube segment with a circumference of 19.5mm, the bonding overlap width is 1mm, and there are two circular holes evenly distributed along the circumference on the paper tube, with a hole diameter of 3mm; 20Y27000 diacetate fiber bundle is used to prepare a acetate fiber segment with a circumference of 19.5mm; the forming paper with an air permeability of 12000CU is used to compound the pre-punched paper tube and the acetate fiber segment with a length ratio of 26:7 to form a composite filter rod; the center of the hole of the pre-punched paper tube is 8mm away from the acetate fiber segment; the heated cigarette is made by using fully self-permeable tipping paper, and the paper tube is close to the tobacco end; the smoke temperature at the outlet near the lip end is detected, and the total amount of smoke captured by the filter during inhalation is used to characterize the smoke volume. The results are shown in Table 1.

[0031] Example 2

[0032] Pre-punched, quantitative 80g / m 2 The base paper is rolled into a pre-punched paper tube with a circumference of 19.5mm, the bonding overlap width is 1mm, and there are 4 circular holes evenly distributed along the circumference on the paper tube; the hole diameter is 1.5mm; 20Y27000 diacetate fiber bundle is used to prepare a acetate fiber segment with a circumference of 19.5mm; the forming paper with an air permeability of 26000CU is used to compound the pre-punched paper tube and the acetate fiber segment into a composite filter rod at a length ratio of 26:7; the center of the hole of the pre-punched paper tube is 8mm away from the acetate fiber segment; ordinary tipping paper and online punching are used to connect heated cigarettes, the punching position coincides with the pre-punched position on the paper tube, the number of holes is a single row of 20 holes, and the paper tube is close to the tobacco end; the smoke temperature at the near-lip outlet is detected, and the total amount of smoke captured by the filter during inhalation is used to characterize the smoke volume. The results are shown in Table 1.

[0033] Example 3

[0034] Pre-punched, quantitative 100g / m 2 The base paper is rolled into a pre-punched paper tube with a circumference of 19.5mm, the bonding overlap width is 1mm, and there are 3 circular holes evenly distributed along the circumference on the paper tube; the hole diameter is 4mm; 20Y27000 diacetate fiber bundle is used to prepare a acetate fiber segment with a circumference of 19.5mm; the forming paper with an air permeability of 12000CU is used to compound the pre-punched paper tube and the acetate fiber segment with a length ratio of 26:7 to form a composite filter rod; the center of the hole of the pre-punched paper tube is 12mm away from the acetate fiber segment; ordinary tipping paper and online punching are used to connect heated cigarettes, the punching position coincides with the pre-punched position on the paper tube, the number of holes is a single row of 20 holes, and the paper tube is close to the tobacco end; the smoke temperature at the near-lip outlet is detected, and the total amount of smoke captured by the filter during inhalation is used to characterize the smoke volume. The results are shown in Table 1.

[0035] Example 4

[0036] Pre-punched, quantitative 120g / m 2The base paper is rolled into a pre-punched paper tube with a circumference of 19.5mm, the bonding overlap width is 1mm, and there are two circular holes evenly distributed along the circumference on the paper tube; the hole diameter is 4mm; the diacetate fiber bundle of 20Y27000 specification is used to prepare the acetate fiber segment with a circumference of 19.5mm; the forming paper with an air permeability of 26000CU is used to compound the pre-punched paper tube and the acetate fiber segment with a length ratio of 26:7 to form a composite filter rod; the center of the hole of the pre-punched paper tube is 12mm away from the acetate fiber segment; ordinary tipping paper and online punching are used to connect heated cigarettes, the punching position coincides with the pre-punched position on the paper tube, the number of holes is a single row of 20 holes, and the paper tube is close to the tobacco end; the smoke temperature at the outlet near the lip end is detected, and the total amount of smoke captured by the filter during inhalation is used to characterize the smoke volume. The results are shown in Table 1.

[0037] Comparative Example 1

[0038] The difference between this embodiment and embodiment 1 is that the diameter of the pre-punched circular hole on the paper tube is 1 mm, and the rest is exactly the same. The smoke temperature at the outlet near the lip is detected, and the total amount of smoke captured by the filter during suction is used to characterize the amount of smoke. The results are shown in Table 1.

[0039] Comparative Example 2

[0040] The difference between this embodiment and embodiment 2 is that the number of pre-punched holes on the paper tube is 1, and the rest is exactly the same. The smoke temperature at the outlet near the lip end is detected, and the total amount of smoke captured by the filter during suction is used to characterize the amount of smoke. The results are shown in Table 1.

[0041] Comparative Example 3

[0042] The difference between this embodiment and embodiment 1 is that the air permeability of the forming paper used for compounding the pre-punched paper tube segment and the acetate fiber segment is 60CU, and the rest is the same. The smoke temperature at the outlet near the lip end is detected, and the total amount of smoke captured by the filter during suction is used to characterize the amount of smoke, and the results are shown in Table 1.

[0043] Comparative Example 4

[0044] The difference between this embodiment and embodiment 1 is that the paper tube segment is not pre-punched, and the rest is the same. The smoke temperature at the outlet near the lip is detected, and the total amount of smoke captured by the filter during suction is used to characterize the amount of smoke. The results are shown in Table 1.

[0045] Comparative Example 5

[0046] The difference between this embodiment and embodiment 1 is that the diameter of the circular hole pre-punched on the paper tube is 5 mm, and the rest is the same. The smoke temperature at the outlet near the lip end is detected, and the total amount of smoke captured by the filter during suction is used to characterize the amount of smoke. The results are shown in Table 1.

[0047] Table 1 Comparison of filter rod suction effect

[0048] Maximum outlet temperature / ℃ Total amount of captured matter per tube / mg Suction effect Example 1 55 27.9 Slightly hot mouth Example 2 53 30.6 Not hot Example 3 50 32.2 Not hot Example 4 52 30.8 Not hot Comparative Example 1 58 23.5 Hot mouth Comparative Example 2 60 20.4 Hot mouth Comparative Example 3 65 19.9 Hot mouth Comparative Example 4 68 18.5 Very hot Comparative Example 5 53 26.0 Feeling of being free

[0049] Tests show that the cooling filter rod provided by the present invention has a certain effect of reducing the smoke inlet temperature, the smoke output is much higher than that of the paper tube without perforations, and there is no burning mouth phenomenon during suction.

[0050] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

Claims

1. A low adsorption cooling filter rod, characterized in that: It is composed of a filter rod core wrapped with high air permeability forming paper; The filter rod core is formed by splicing a paper tube segment and a acetate fiber segment; A plurality of small holes are evenly distributed along the circumference of the surface of the paper tube segment.

2. A low adsorption cooling filter rod according to claim 1, characterized in that: The outer diameter of the paper tube section is the same as that of the acetate fiber section.

3. A low adsorption cooling filter rod according to claim 2, characterized in that: The paper tube segment has a basis weight of 50 to 120 g / m 2 It is made of base paper rolls.

4. A low adsorption cooling filter rod according to claim 1, 2 or 3, characterized in that: The small holes on the surface of the paper tube segment are evenly distributed within a range of 5 to 15 mm from the acetate fiber segment.

5. A low adsorption cooling filter rod according to claim 4, characterized in that: The number of small holes on the surface of the paper tube segment is 2 to 4.

6. A low-adsorption cooling filter rod according to claim 1, 2, 3 or 5, characterized in that: The small holes are circular holes with a diameter in the range of 1.5 to 4.0 mm, or elliptical holes, diamond holes, rectangular holes or other irregular holes with equal areas.

7. The low-adsorption cooling filter rod according to claim 1, characterized in that: The acetate fiber segment is composed of a tow with a single denier greater than 20.0 tex.

8. The low-adsorption cooling filter rod according to claim 7, characterized in that: The filament bundle is composed of diacetate filaments.

9. A low-adsorption cooling filter rod according to claim 1, 2, 3, 5 or 7, characterized in that: The length ratio of the paper tube segment and the acetate segment is (30-23):

7.

10. The low-adsorption cooling filter rod according to claim 1, characterized in that: The high-permeability plugging paper has an air permeability of 6000-26000 CU.

11. The use of a low-adsorption cooling filter rod according to any one of claims 1 to 10, characterized in that: Used in preparing heated cigarettes.

12. The use of a low-adsorption cooling filter rod according to claim 11, characterized in that: The low-adsorption cooling filter rod is compositely connected with a cigarette rod to form a heating-type cigarette.

13. The use of a low-adsorption cooling filter rod according to claim 11, characterized in that: The tipping paper used for the tipping is fully self-transparent tipping paper or pre-punched tipping paper.

14. The use of a low-adsorption cooling filter rod according to claim 11, characterized in that: One end of the paper tube section of the low-adsorption cooling filter stick is composited with the cigarette stick.

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