Cooling filter stick and application thereof

Abstract

The invention discloses a cooling filter stick and application thereof. The cooling filter stick is formed by wrapping a filter stick core with high-breathability forming paper. The filter stick core is formed by splicing a spiral breathable paper tube section and an acetate fiber section; and a spiral breathable belt is arranged on the wall of the spiral breathable paper tube section. The temperature of smoke is reduced through air suction during suction of the spiral breathable paper tube section. 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 preparation of a heating type cigarette, the spiral breathable paper tube is hollow and free of smoking resistance, smoke adsorption is almost zero, larger smoking smoke amount can be provided, heat conduction of heat along the outer edge of the filter stick during heating and smoking is hindered due to poor heat conduction of the spiral breathable belt, and the heat insulation effect is achieved.

Description

Technical Field

[0001] The invention relates to a cooling filter rod, in particular to a cooling filter rod with the effect of a spiral air-permeable paper tube segment, and application of the 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 passes through the filter tip and directly enters the mouth. In order to achieve a sufficient aerosol experience, the filter material is required to minimize the adsorption of aerosols, so the length of the filter material is limited. At the same time, due to the influence of the high-temperature airflow velocity, the temperature of the aerosol entering the mouth is high, which can easily cause consumers to have a strong burning sensation on the lips and tongue when they smoke.

[0003] In the prior art, a multi-section cigarette design is generally used to cool down the hot smoke generated by the cigarette core section. 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 empty tube filters. They are perforated and ventilated to reduce the smoke temperature. However, this method has the problem that the holes cannot be punched through, resulting in too high a smoke temperature. The paper empty tube mouthpiece is very likely to cause a burn in the mouth due to too fast heat conduction. The acetate fiber empty tube filter will produce a large adsorption of the aerosol, resulting in insufficient smoke volume. 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 temperature of the smoke generated is relatively high, causing a burning sensation in the consumer's mouth, and when a cooling film or acetate fiber hollow tube is 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 cooling filter rod that has less adsorption of smoke aerosols and does not cause a burning sensation in the consumer's mouth.

[0005] The second object of the present invention is to provide an application of a cooling filter rod, which can be used to heat cigarette filter rods to provide a better smoking temperature experience and a larger amount of smoke.

[0006] In order to achieve the above technical objectives, the present invention provides a cooling filter rod, which is composed of a filter rod core wrapped with highly breathable molding paper; the filter rod core is spliced ​​by a spiral breathable paper tube segment and a acetate fiber segment; a spiral breathable belt is provided on the wall of the spiral breathable paper tube segment.

[0007] The key to the present invention is that the spiral breathable paper tube segment is used in conjunction with the high-permeability forming paper to produce a cooling effect on the smoke. First, during heating and suction, cold air can enter the filter rod through the spiral ventilation channel provided by the filter rod wall to reduce the smoke temperature and reduce the burning sensation in the mouth caused by the excessively high smoke temperature; secondly, the spiral paper tube segment can act as a heat insulation zone, relieving and blocking the heat conduction along the filter rod wall at high temperature, which can greatly alleviate the burning sensation of the lips caused by the excessively high filter rod wall temperature. More importantly, the spiral breathable paper tube segment of the present invention is composed of high-quantity base paper and low-quantity base paper, wherein the high-quantity base paper can provide sufficient support and paper tube hardness for the paper tube, while the low-quantity base paper can provide high ventilation; and the use of a spiral method can, on the one hand, guarantee the support of the paper tube to the greatest extent, and on the other hand, can make the hot smoke inside the paper tube segment evenly and controllably cool down. In addition, the interior of the spiral breathable paper tube is transparent and does not produce any resistance to suction. The smoke contact area is small, so the smoke adsorption is extremely low. At the same time, the mouth-near section uses low-adsorption high-denier acetate fiber bundles to ensure the amount of smoke in the entrance. This can provide a better sense of smooth suction and a larger amount of smoke, giving consumers a better user experience.

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

[0009] As a preferred solution, the basis weight of the high basis weight base paper is 50 to 120 g / m 2 , air permeability is 0-10CU; the basis weight of the low basis weight base paper is 24-45g / m 2 , the air permeability is 3000~26000CU. The high-weight base paper adopts the appropriate weight to provide sufficient support and paper tube hardness for the spiral breathable paper tube, so that it can meet the needs of filter rod production; the low-weight base paper provides appropriate support for the paper tube on the one hand, and mainly provides high ventilation on the other hand. It is further preferred that the weight of the high-weight base paper is 60~90g / m 2 , air permeability is 0~5CU; the basis weight of low basis weight paper is 24~35g / m 2 , the air permeability is 12000~26000CU. Too high paper weight will seriously affect the forming of paper tube, greatly reduce the yield rate and make quality control difficult. Too low paper weight will lead to insufficient support and hardness of paper tube, and filter rod will be easily deformed. For low-weight base paper, high enough air permeability can provide sufficient ventilation for filter rod, but base paper with high air permeability is expensive and rare.

[0010] As a preferred solution, the inner surface coating of the high-weight base paper includes a cooling coating or a slow-release coating containing flavoring materials. The cooling coating includes but is not limited to low-melting point hot melt adhesive, polylactic acid, PEG, fatty acid, etc., which can further improve the cooling effect of the filter rod. The slow-release coating containing flavoring materials can make the filter rod have a fragrance-enhancing effect.

[0011] As a preferred solution, the width of the spiral air-permeable belt is 1 to 10 mm. Different widths of the air-permeable belt can bring different ventilation and cooling effects. To ensure that the spiral air-permeable paper tube has sufficient support and hardness, the width of the air-permeable belt should not be too wide. If the width of the air-permeable belt is too small, the cooling effect of the smoke is not good.

[0012] As a preferred solution, the area of ​​the spiral air-permeable belt accounts for 8-80% of the area of ​​the spiral air-permeable paper tube section. The proportion of the spiral air-permeable belt area can be adjusted by single or multiple factors such as the width of the air-permeable belt, the spacing of the air-permeable belt and the spiral angle of the air-permeable belt. If the proportion of the spiral air-permeable belt area is too small, the filter rod may not be sufficiently ventilated, and its blocking effect on the heat conduction of the flue gas is also small, which will cause the flue gas temperature to be high and the mouth to be scalded; if the area of ​​the spiral air-permeable belt is too large, the ventilation is too large, which affects the smoking taste, and the paper tube is not rigid enough to meet the needs of industrial production. It is further preferred to be 10-65%.

[0013] As a preferred solution, the acetate segment is composed of a tow with a single denier ≥ 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, 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 length ratio of the spiral breathable paper tube section and the acetate fiber section is 30-23:7. On the one hand, the large-scale use of the spiral breathable paper tube can provide more breathable belts and lower absorption resistance, so that its cooling and low adsorption performance can be exerted to a greater extent. On the other hand, the minimum length of the acetate fiber section can ensure the production needs of the filter rod under current industrial conditions while reducing the adsorption of the filter rod to the flue gas as much as possible.

[0015] As a preferred solution, the air permeability of the high-permeability plugging paper is 6000-26000 CU. The air permeability is further preferably 12000-26000 CU. The high-permeability plugging paper can provide a better ventilation and cooling effect for the filter rod. Too low air permeability is difficult to achieve a cooling effect, while too high air permeability increases the cost of the filter rod.

[0016] The present invention also provides an application of a cooling filter rod, which is applied to a heated cigarette filter rod, has the advantages of large smoke volume, low suction temperature, etc., and can bring better smoking experience to consumers.

[0017] As a preferred solution, the cooling filter rod and the cigarette rod are compositely assembled into a heating type cigarette.

[0018] As a preferred solution, when the cooling filter rod is used for heating cigarette filter rods, the tipping paper is fully self-transparent tipping paper or pre-punched tipping paper.

[0019] As a preferred solution, when the 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.

[0020] Compared with the prior art, the technical solution of the present invention has the following beneficial technical effects:

[0021] 1) The cooling filter rod of the present invention uses a spiral breathable belt can alleviate and block the heat conduction of high-temperature smoke along the filter rod wall, which can greatly alleviate the burning sensation on the lips caused by the excessively high temperature of the filter rod wall, and provide a better smoking experience.

[0022] 2) The cooling filter rod of the present invention is mainly a spiral breathable paper tube, which is transparent inside and does not produce suction resistance. The smoke contact surface is small, so the smoke adsorption is extremely low, which can provide a better suction smoothness and a larger amount of smoke.

[0023] 3) The cooling filter rod of the present invention is simple in form, easy to produce, degradable, low in cost, and has a good cooling effect.

[0024] 4) The present invention can achieve different ventilation and cooling effects of the filter rod by controlling the width of the spiral air-permeable belt, and can also achieve better cooling effect by using high-weight base paper and low-weight base paper through the paper tube section, and make it have a fragrance function. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of the spiral breathable paper tube of the present invention.

[0026] Figure 2 This is a schematic diagram of the application of the filter rod of the present invention in a cigarette.

[0027] In the figure, 1-high-weight base paper, 2-low-weight base paper (breathable belt), 3-paper tube section, 4-acetate section, 5-breathable forming paper, 6-ventilated tipping paper. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] The quantitative ratio is 60g / m 2 and 25g / m 2The base paper of low-weight base paper has an air permeability of 3000CU and high-weight base paper has an air permeability of 0CU. The two base papers are coated with 2mm wide water-based tape on both sides, alternately bonded and rolled into a spiral paper tube, and the width of the spiral air permeable belt is controlled to be 1mm, and the area of ​​the spiral air permeable belt is controlled to be 10% of the area of ​​the spiral air permeable paper tube segment, and cut into a suitable length; 20Y27000 specification tow is used to prepare the acetate fiber segment; 6000CU high permeability forming paper is used to compound the spiral air permeable paper tube segment and the acetate fiber segment into a composite filter rod at a length ratio of 26:7, and the outer diameters of the two are the same; the fully self-permeable tipping paper is used to connect the heated cigarette, and the paper tube is close to the tobacco end. The outlet smoke temperature near the lip end and the filter rod wall temperature are detected respectively, 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] The quantitative ratio is 80g / m 2 and 28g / m 2 The base paper of low-weight base paper has an air permeability of 12000CU and high-weight base paper has an air permeability of 0CU. The two base papers are coated with 3mm wide water-based tape on both sides, alternately bonded and rolled into a spiral paper tube, the width of the spiral air permeable belt is controlled to be 3mm, the area of ​​the spiral air permeable belt is controlled to be 25% of the area of ​​the spiral air permeable paper tube section, and cut into a suitable length; 20Y27000 specification tow is used to prepare the acetate fiber section; 12000CU high permeability forming paper is used to compound the spiral air permeable paper tube section and the acetate fiber section into a composite filter rod at a length ratio of 26:7, and the outer diameters of the two are the same; the fully self-permeable tipping paper is used to connect the heated cigarette, and the paper tube is close to the tobacco end. The outlet smoke temperature near the lip end and the filter rod wall temperature are detected respectively, 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] The quantitative ratio is 90g / m 2 and 35g / m 2 The base paper of low-weight base paper has an air permeability of 26000CU and high-weight base paper has an air permeability of 0CU. The two base papers are coated with 1mm wide water-based tape on both sides, alternately bonded and rolled into a spiral paper tube, the width of the spiral air permeable belt is controlled to be 5mm, the area of ​​the spiral air permeable belt is controlled to be 55% of the area of ​​the spiral air permeable paper tube section, and cut into a suitable length; 20Y27000 specification tow is used to prepare the acetate fiber section; 26000CU high permeability forming paper is used to compound the spiral air permeable paper tube section and the acetate fiber section into a composite filter rod at a length ratio of 26:7, and the outer diameters of the two are the same; pre-punched paper (double row 10 holes) is used to connect the heated cigarette, and the paper tube is close to the tobacco end. The outlet smoke temperature near the lip end and the filter rod wall temperature are detected respectively, 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] The quantitative ratio is 80g / m 2 and 28g / m 2 The base paper of low-weight base paper has an air permeability of 14000CU and high-weight base paper has an air permeability of 1CU. The two base papers are coated with 3mm wide water-based tape on both sides, alternately bonded and rolled into a spiral paper tube, the width of the spiral air permeable belt is controlled to be 7mm, the area of ​​the spiral air permeable belt is controlled to be 65% of the area of ​​the spiral air permeable paper tube section, and cut into a suitable length; 20Y27000 specification tow is used to prepare the acetate fiber section; 12000CU high permeability forming paper is used to compound the spiral air permeable paper tube section and the acetate fiber section into a composite filter rod at a length ratio of 30:7, and the outer diameters of the two are the same; the fully self-permeable tipping paper is used to connect the heated cigarette, and the paper tube is close to the tobacco end. The outlet smoke temperature near the lip end and the filter rod wall temperature are detected respectively, 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 comparative example and Example 1 is that the hollow tube rod is prepared by using acetate fiber segments of equal length instead of spiral air-permeable paper tube segments, the same plugging paper as in Example 1 is used to compound them into composite filter rods of the same specifications, and the same tipping paper is used to make cigarettes. 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 amount of smoke. The results are shown in Table 1.

[0039] Comparative Example 2

[0040] The difference between this comparative example and Example 2 is that the air permeability of the low basis weight base paper is changed to 100 CU, and the rest is the same as Example 2. 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 smoke amount. The results are shown in Table 1.

[0041] Comparative Example 3

[0042] The quantitative is 60g / m 2 , 0CU air permeability base paper roll, 2mm wide water-based tape was coated on both sides of the base paper, alternately bonded and rolled into a spiral paper roll, no air permeable tape on the paper roll wall, cut into appropriate lengths; 20Y27000 specification tow was used to prepare acetate fiber segment; 6000CU high air permeability forming paper was used to compound the spiral air permeable paper roll segment and the acetate fiber segment into a composite filter rod at a length ratio of 26:7, and the two had the same outer diameter; fully self-permeable tipping paper was used to connect the heated cigarette, and the paper roll was close to the tobacco end. The near-lip outlet smoke temperature and filter rod wall temperature were detected respectively, and the total amount of smoke captured by the filter during inhalation was used to characterize the smoke volume, and the results are shown in Table 1.

[0043] Comparative Example 4

[0044] The quantitative value is 30g / m 2 , air permeability is 0CU and 25g / m 2 , 6000CU base paper, coated with 1mm wide water-based tape on both sides of the two base papers, alternately bonded and rolled into a spiral paper tube, and the width of the spiral breathable tape was controlled to 5mm. It was planned to be cut into appropriate lengths and then compounded with the acetate base rod. The paper tube can be rolled smoothly, but when cutting, the paper tube lacks support due to the low paper weight and the low hardness, resulting in severe deformation during cutting, and the next process cannot be carried out.

[0045] Comparative Example 5

[0046] The difference between this comparative example and Example 3 is that the width of the spiral breathable belt is intended to be set to 12 mm, and the rest is the same as Example 3. During the rolling process, it is found that due to the limited support force provided by the breathable belt paper, the excessive width setting makes the support force provided by the high-quantity base paper insufficient to meet the support force requirements of the entire paper roll, and deformation occurs during rolling and cannot meet the subsequent use requirements.

[0047] Table 1 Temperature detection results

[0048]

[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 volume is much higher than that of the comparative example, and there is no burning mouth phenomenon during smoking.

[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 cooling filter rod, characterized in that: It is composed of a filter rod core wrapped with highly breathable forming paper; The filter rod core is formed by splicing a spiral breathable paper tube segment and an acetate fiber segment; A spiral air-permeable belt is arranged on the wall of the spiral air-permeable paper tube section.

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

3. A cooling filter rod according to claim 1, characterized in that: The spiral air-permeable belt of the spiral air-permeable paper tube section is composed of low-weight base paper, and the remaining part is composed of high-weight base paper.

4. A cooling filter rod according to claim 3, characterized in that: The basis weight of the high basis weight base paper is 50 to 120 g / m 2 , air permeability is 0-10CU; the basis weight of the low basis weight base paper is 24-45g / m 2 , air permeability is 3000~26000CU.

5. A cooling filter rod according to claim 4, characterized in that: The inner surface coating of the high-weight base paper includes a temperature-reducing coating or a slow-release coating containing a fragrance.

6. A cooling filter rod according to claim 1 or 3, characterized in that: The width of the spiral air-permeable belt is 1-10 mm; the area of ​​the spiral air-permeable belt accounts for 8-80% of the area of ​​the spiral air-permeable paper tube section.

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

8. A cooling filter rod according to claim 1, 2, 3, 4, 5 or 7, characterized in that: The length ratio of the spiral breathable paper tube section to the acetate fiber section is 30-23:

7.

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

10. The use of a cooling filter rod according to any one of claims 1 to 9, characterized in that: Used in preparing heated cigarettes.

11. The use of a cooling filter rod according to claim 10, characterized in that: The cooling filter rod and the cigarette rod are compositely connected to form a heating type cigarette.

12. The use of a 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.

13. The use of a cooling filter rod according to claim 12, characterized in that: One end of the paper tube section of the cooling filter rod is combined with the cigarette rod.

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