A filter unit with a corrugated structure and a heated cigarette containing the same

Abstract

The present invention discloses a filter unit with a corrugated structure, the filter unit having a tube wall (31) and an axial tube cavity (32); the tube wall (31) comprises a grooved corrugated layer (311) and an inner wrapping layer (312), the inner wrapping layer (312) being close to the axial tube cavity (32); the axial tube cavity (32) contains a filter component (321). The present invention introduces a grooved corrugated structure into a filter unit of a heated cigarette for the first time, and when smoking, the lips of the consumer will not contact the surface of the paper material wrapping the filter material, thereby avoiding the problem of burning the lips on the filter tip surface. In addition, the filter unit of the present invention can also introduce a small amount of air into the consumer's mouth through the grooves of the grooved corrugated layer (311) by punching holes in the tipping layer (4) that exposes the grooved corrugated layer (311) or wraps the grooved corrugated layer (311), thereby reducing the temperature of the smoke entering the consumer's mouth.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of heated cigarette production, and specifically to a filter unit with a corrugated structure and a heated cigarette containing the same. Background Art

[0002] As consumers pay more attention to health issues and demand for personalized experience of cigarette products, the tobacco industry continues to respond to the upgrading of consumer demand and develop various cigarettes with reduced tar and reduced harm. Among them, heat-not-burn cigarettes are different from traditional cigarette products in that their heating method is different, which enables them to meet consumers' sensory needs for cigarette products while providing a healthier smoking experience.

[0003] Existing heated cigarettes mainly include a smoking unit, a hollow support section, a cooling section and a filter unit. Currently, the cooling section is mostly a gathered polylactic acid film, which is easy to stick to each other after absorbing heat, reducing the amount of smoke, and the cooling effect is not ideal, resulting in a high temperature entering the consumer's mouth. In addition, when the smoke after the cooling section passes through the filter unit, part of the temperature of the smoke is transferred to the surface of the filter tip with the heat transfer effect of the filter material, which directly causes the filter tip to be too hot. Some consumers believe that the surface temperature of the heated cigarette filter rod is high and burns the skin of their mouths.

[0004] In order to further effectively reduce the flue gas temperature, on the one hand, the amount of cooling material in the cooling section is increased, but this method will only lead to a slight improvement in the cooling effect, while the cost of the cooling section is greatly increased; on the other hand, air is introduced to increase ventilation. Usually, online laser drilling is used to drill holes in the hollow support section of the cigarette, penetrate the tube wall of the hollow support section and the forming paper and tipping paper that wrap the hollow support section, to form ventilation holes and introduce air, but the amount of air introduced by this method is limited, and the cooling effect is not significantly improved. More importantly, the online laser drilling process has high requirements on the material and thickness of the hollow support section tube wall. First, the material of the hollow support section tube wall cannot collapse during the online laser drilling process, and the hollow support section tube wall cannot be particularly thick, so as to avoid failure to penetrate during online laser drilling; the online laser drilling process has high requirements on laser power. If the laser drilling equipment fails to penetrate the hollow support section tube wall, problems such as unqualified production of heated cigarettes and overheating of the flue gas temperature will occur.

[0005] Therefore, it is desirable to prepare a heated cigarette with a filter unit surface that is not hot to the mouth and a suitable smoke temperature entering the consumer's mouth.

[0006] The present invention has been proposed in order to solve the above-mentioned problems. Summary of the invention

[0007] A first aspect of the present invention provides a filter unit with a corrugated structure, the filter unit having a tube wall 31 and an axial tube cavity 32;

[0008] The tube wall 31 includes a grooved corrugated layer 311 and an inner wrapping layer 312 , and the inner wrapping layer 312 is close to the axial tube cavity 32 ;

[0009] The axial tube cavity 32 contains a filter component 321 .

[0010] Preferably, the inner wrapping layer 312 is a paper layer, an acetate fiber layer or a polymer material non-woven fabric layer.

[0011] Preferably, the grooved corrugated layer 311 is formed by rolling a sheet material, the sheet material is selected from acetate sheet, paper, polyethylene sheet, polypropylene sheet, polyvinyl chloride sheet, polyethylene terephthalate sheet or polylactic acid sheet, and the thickness of the sheet material is 0.02mm-0.2mm.

[0012] Preferably, the shape of the corrugations of the grooved corrugated layer 311 is arc-shaped, V-shaped, U-shaped or trapezoidal, and the thickness of the grooved corrugated layer 311 is 0.3 mm-3 mm.

[0013] Preferably, the filter component 321 is made of acetate fiber tow, polylactic acid tow, porous material, etc.

[0014] The second aspect of the present invention provides a heated cigarette comprising the filter unit, which also includes: a smoking unit 1 and a supporting cooling unit 2 located between the smoking unit 1 and the filter unit; the length of the filter unit is 25%-75% of the total length of the smoking unit 1 and the filter unit.

[0015] Preferably, the filter unit and the supporting cooling unit 2 are connected by wrapping with a tipping layer 4, and the tipping layer 4 extends at least part of the length along the axial direction of the filter unit.

[0016] Preferably, the tipping layer 4 is a tipping paper which extends along the entire length of the axial direction of the filter unit, and the tipping paper wrapping the filter unit has ventilation holes 41 .

[0017] Preferably, the tipping layer 4 is formed paper, which extends part of its length along the axial direction of the filter unit, the filter unit close to the supporting cooling unit 2 is wrapped by the formed paper, and the remaining part of the grooved corrugated layer 31 on the filter unit is directly exposed.

[0018] The heated cigarette in the present invention refers to a heat-not-burn cigarette.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The tube wall 31 of the filter unit of the present invention includes a grooved corrugated layer 311. When inhaling, the lips of the consumer will not come into contact with the surface of the paper material wrapping the filter material, thereby avoiding the problem of the filter tip burning the lips due to the partial temperature of the smoke being transferred to the filter tip surface along with the heat transfer effect of the filter material.

[0021] 2. The tube wall 31 of the filter unit of the present invention includes a grooved corrugated layer 311. When the filter unit is used to roll heated cigarettes, the outer side of the grooved corrugated layer 311 is at least partially wrapped by the tipping layer 4. When the tipping layer 4 is formed paper, the filter unit is partially wrapped by the forming paper near the support cooling unit 2, and the remaining grooved corrugated layer 31 on the filter unit is directly exposed. When smoking, the smoker's lips directly contact the exposed grooved corrugated layer 31. Since the smoker's lips are relatively soft, when they contact the grooved corrugated layer 31, the lips will deform appropriately, so that they have a certain degree of fit with the grooved corrugated layer, but it is not completely sealed. The gap can just introduce a small amount of air into the smoker's mouth, thereby reducing the temperature of the filter unit surface and the smoke temperature in the smoker's mouth, avoiding the problem of the filter unit burning the lips and the smoke temperature inhaled into the mouth being too hot. Since the amount of air introduced is relatively small, there will be no obvious mixing of a large amount of air in the smoke, and the problem of serious reduction in smoking quality. In addition, since the smoker's lips are in direct contact with the grooved corrugations of the grooved corrugated layer 31, the contact area is small, which further avoids the problem of the filter unit burning the lips.

[0022] 3. When the tipping layer 4 is made of tipping paper, the outside of the grooved corrugated layer 31 is completely wrapped with tipping paper, and the tipping paper wrapping the filter unit has ventilation holes 41. When inhaling, the outside air enters the grooves of the grooved corrugated layer 31 through the ventilation holes 41, and is further inhaled into the smoker's mouth, thereby reducing the smoke temperature in the smoker's mouth. In addition, the lips of the smoker in the cigarette of the present invention are in contact with the tipping paper wrapping the grooved corrugated layer 31, and the grooves of the grooved corrugated layer 31 also have air introduced from the outside environment. Compared with direct contact with the surface of the paper material wrapping the filter material, the filter unit prepared by the present invention will not have the problem of burning the lips.

[0023] 4. In a preferred embodiment of the present invention, the corrugated shape and size of the grooved corrugated layer 311 can be adjusted to ensure that an appropriate amount of air is introduced into the consumer's mouth.

[0024] 5. In the present invention, the grooved corrugated layer 311 is formed by rolling a sheet material, wherein the sheet material is selected from acetate sheet, paper, polyethylene sheet, polypropylene sheet, polyvinyl chloride sheet, polyethylene terephthalate sheet or polylactic acid sheet, which is non-toxic and harmless and is safe to contact with the lips of consumers.

[0025] 6. The present invention introduces the grooved corrugated structure into the filter unit of the heated cigarette for the first time. Compared with the acetate fiber tow filter unit commonly used in the prior art, the filter unit prepared by the present invention can also achieve the same filtering effect, and can also introduce a small amount of air into the consumer's mouth, reducing the smoke temperature on the filter unit surface and entering the consumer's mouth. The contribution of the present invention is that it overcomes the technical prejudice of using solid fiber tow as the filter unit in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a cross-sectional view of the end surface of the filter unit close to the lips of the consumer in Example 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of heating a cigarette in Example 1 of the present invention;

[0028] Figure 3 This is a cross-sectional view of the end surface of the filter unit of Example 2 of the present invention close to the lips of the consumer;

[0029] Figure 4 This is a schematic diagram of the structure of heating a cigarette according to Embodiment 2 of the present invention;

[0030] The names of the figure numbers in the figure description are: 1-smoking unit, 2-support cooling unit, 3-filtering unit, 4-tipping layer, 31-tube wall, 32-axial tube cavity, 41-ventilation hole, 311-grooved corrugated layer, 312-inner wrapping layer, 321-filtering component. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with embodiments and drawings. The embodiments are only intended to illustrate the present invention, but not to limit the present invention.

[0032] Example 1

[0033] This embodiment is the preparation of a heated cigarette sample 1, which includes a smoking unit 1, a supporting cooling unit 2 and a filtering unit 3; the length of the filtering unit 3 is 50% of the total length of the smoking unit 1 and the filtering unit.

[0034] The filter unit 3 and the support cooling unit 2 are connected by wrapping with a tipping layer 4. The tipping layer 4 is a shaping paper that extends part of its length along the axial direction of the filter unit. The filter unit is wrapped with the shaping paper near the support cooling unit 2, and the remaining part of the grooved corrugated layer 31 on the filter unit is directly exposed. Figure 2 shown.

[0035] The filter unit 3 has a tube wall 31 and an axial tube cavity 32 ; the tube wall 31 includes a grooved corrugated layer 311 and an inner wrapping layer 312 , and the inner wrapping layer 312 is close to the axial tube cavity 32 ; the axial tube cavity 32 accommodates a filter component 321 .

[0036] The inner wrapping layer 312 is a paper layer. The grooved corrugated layer 311 is formed by rolling a sheet material, the sheet material is selected from an acetate fiber sheet, and the thickness of the sheet material is 0.1 mm. The shape of the corrugation of the grooved corrugated layer 311 is a V-shaped 1 mm. The filter component 321 is an acetate fiber tow.

[0037] Example 2

[0038] This embodiment is the preparation of a heated cigarette sample 2 , which includes a smoking unit 1 , a supporting cooling unit 2 and a filtering unit 3 .

[0039] The filter unit 3 and the supporting cooling unit 2 are connected by wrapping with a tipping layer 4. The tipping layer 4 is a tipping paper that extends along the entire length of the filter unit in the axial direction. The tipping paper that wraps the filter unit has ventilation holes 41. Figure 4 shown.

[0040] The other structures of the filter unit 3 are the same as those of the cigarette sample 1 in Example 1.

[0041] Comparative Example

[0042] This comparative example is the preparation of a heated cigarette comparison sample. The difference between the heated cigarette comparison sample and the heated cigarette sample 1 is that the filter unit 3 of the heated cigarette comparison sample does not have a corrugated structure, but is an acetate fiber bundle wrapped with forming paper used in the prior art.

[0043] Three experts with sensory evaluation qualifications were invited to conduct sensory evaluation on heated cigarette sample 1 (Example 1), heated cigarette sample 2 (Example 2), and heated cigarette control sample (control sample) respectively, referring to the QYNZY.J07.022-2015 standard. The results are shown in Table 1 (the average value of the evaluation results of the three sensory evaluation experts). At the same time, the temperature of the smoke entering the mouth of the evaluation experts was recorded.

[0044] Table 1 Sensory quality record of heated cigarettes

[0045] Standard basis: QYNZY.J07.022-2015

[0046]

[0047] It can be concluded from Table 1 that after being evaluated by sensory personnel, cigarette sample 1 and cigarette sample 2 have better improvements in irritation, smoke volume and temperature.

[0048] During the smoking process, the smoke temperature entering the mouth of the expert smoker was recorded at the same time. The measurement showed that the smoke temperature of cigarette sample 1 and cigarette sample 2 entering the mouth of the expert smoker was about 36°C, which smokers felt was acceptable, while the smoke temperature of the cigarette comparison sample entering the mouth of the expert smoker was 38°C. Therefore, compared with the acetate fiber bundle rod commonly used in the prior art, the filter unit 3 of the cigarette sample 1 and cigarette sample 2 prepared by the present invention has a better cooling effect. In addition, during the smoking process, the expert smoker can also clearly feel that the surface temperature of the filter unit 3 of the cigarette sample 1 and cigarette sample 2 is lower than that of the cigarette comparison sample, and the lips feel more comfortable.

Claims

1. A heated cigarette comprising a filter unit having a corrugated structure, characterized in that: The filter unit with a corrugated structure has a tube wall (31) and an axial tube cavity (32); The tube wall (31) comprises a grooved corrugated layer (311) and an inner wrapping layer (312), wherein the inner wrapping layer (312) is close to the axial tube cavity (32); The axial tube cavity (32) contains a filter component (321); The heated cigarette further comprises: a smoking unit (1) and a supporting cooling unit (2); the supporting cooling unit (2) is located between the smoking unit (1) and the filtering unit; the length of the filtering unit is 25%-75% of the total length of the smoking unit (1) and the filtering unit; The filter unit and the supporting cooling unit (2) are wrapped and connected by a tipping layer (4), and the tipping layer (4) extends at least part of the length along the axial direction of the filter unit; The tipping layer (4) is a tipping paper, which extends along the entire length of the axial direction of the filter unit, and the tipping paper wrapping the filter unit has ventilation holes (41); Alternatively, the tipping layer (4) is a shaping paper which extends part of its length along the axial direction of the filter unit, the filter unit close to the supporting cooling unit (2) is wrapped by the shaping paper, and the remaining part of the grooved corrugated layer (31) on the filter unit is directly exposed.

2. The heated cigarette according to claim 1, characterized in that: The inner wrapping layer (312) is a paper layer, an acetate fiber layer or a polymer material non-woven fabric layer.

3. The heated cigarette according to claim 1, characterized in that: The grooved corrugated layer (311) is formed by rolling a sheet material, wherein the sheet material is selected from acetate sheet, paper, polyethylene sheet, polypropylene sheet, polyvinyl chloride sheet, polyethylene terephthalate sheet or polylactic acid sheet, and the thickness of the sheet material is 0.02mm-0.2mm.

4. The heated cigarette according to claim 1, characterized in that: The shape of the corrugations of the grooved corrugated layer (311) is arc-shaped, V-shaped, U-shaped or trapezoidal, and the thickness of the grooved corrugated layer (311) is 0.3 mm-3 mm.

5. The heated cigarette according to claim 1, characterized in that: The filter component (321) is made of acetate fiber bundle, polylactic acid bundle, or porous material.

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