CN111358048B - Cigarette filter stick - Google Patents
Cigarette filter stick Download PDFInfo
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- CN111358048B CN111358048B CN201811592960.6A CN201811592960A CN111358048B CN 111358048 B CN111358048 B CN 111358048B CN 201811592960 A CN201811592960 A CN 201811592960A CN 111358048 B CN111358048 B CN 111358048B
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- porous material
- dimensional porous
- cigarette filter
- smoke
- cigarette
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
- A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
Abstract
The application relates to the technical field of tobacco, in particular to a cigarette filter stick. The application provides a cigarette filter stick, cigarette filter stick includes: the three-dimensional porous material column is made of a three-dimensional porous material, wherein the pore diameter of the three-dimensional porous material is 0.1-1 mm, the porosity of the three-dimensional porous material is 10-98%, and the through porosity of the three-dimensional porous material is 20-98%; the first end cigarette filter rod is connected with one end of the three-dimensional porous material column. The three-dimensional porous material is utilized, so that the interception efficiency of the cigarette filter stick to cigarette smoke can be obviously reduced, the smoke concentration of the cigarette is improved, the cigarette smoke temperature is well reduced, and the phenomenon of deformation in the cooling process is avoided.
Description
Technical Field
The application relates to the technical field of tobacco, in particular to a cigarette filter stick.
Background
The cigarette is heated to provide nicotine and tobacco characteristic aroma to consumers by heating the non-burning tobacco. Because the tobacco material does not participate in combustion, the heating temperature is lower than 500 ℃, and the release amount of harmful substances generated by high-temperature cracking in the mainstream smoke is greatly reduced; meanwhile, the tobacco material is in a relatively closed space in the heating process, and basically has no side-stream smoke, so that the harm of second-hand smoke is greatly reduced. At present, related products in the market mainly adopt an electric heating mode, such as fimo international Iqos smoking set, tobacco Glo in English and American and the like. However, because the use temperature of the product is low, the smoke concentration is weaker in general conditions; meanwhile, as the heat source is close to the mouth end, the smoke temperature is high, the phenomena of mouth scalding, tongue scalding and the like can be generated, and poor consumption experience is brought to consumers. In order to solve one or two problems, for example, a special filter stick structure is adopted in a Heatstick cigarette in Feimei, the middle section is a cooling section formed by embossing and shrinking a polylactic acid film, the cooling section can effectively reduce the smoke temperature, but the material is not high-temperature resistant, and the phenomena of collapse or melting and the like can occur when smoke passes through; the Yingmei tobacco is perforated on a filter stick in a Neostatic cigarette, and the smoke temperature is reduced through air dilution, but the smoke concentration can also be reduced. How to better ensure the smoke concentration and reduce the smoke temperature is an important problem to be solved urgently when the cigarette is not heated and combusted. The existing cigarette composite filter tip can bring large resistance to smoking during the composite filter stick process, has a very good filtering effect, is not beneficial to fully releasing the smoke of a non-combustible cigarette during heating, can greatly reduce the smoke concentration of the non-combustible cigarette during heating, and greatly reduces the consumption experience.
Disclosure of Invention
The application aims to provide a cigarette filter stick, which can effectively reduce the interception efficiency of the filter stick to cigarette smoke; the concentration of cigarette smoke is improved; the temperature of the smoke of the cigarette is reduced.
In view of this, the present application provides a cigarette filter stick comprising:
the three-dimensional porous material column is made of a three-dimensional porous material, wherein the pore diameter of the three-dimensional porous material is 0.1-1 mm, the porosity of the three-dimensional porous material is 10-98%, and the through porosity of the three-dimensional porous material is 20-98%;
the first end cigarette filter stick is connected with one end of the three-dimensional porous material column.
Preferably, the three-dimensional porous material is a thermally conductive metal foam, a thermally conductive porous ceramic, a thermally conductive porous graphite, or a thermally conductive graphene.
Preferably, the heat conductive foam metal is copper foam, aluminum foam or nickel foam.
Compared with common sintered porous metal, the heat-conducting foam metal has higher porosity and larger pore size. The porosity of the heat-conducting foam metal can reach more than 90%, the pore diameter can reach millimeter level, and the foam metal has certain strength and rigidity. The smoke-retaining agent is applied to a heating non-combustible filter stick, has low smoke-retaining efficiency, can reduce the filtering effect on nicotine and flavor components in smoke to the maximum extent, and ensures the smoke concentration; meanwhile, the migration path of the smoke in the heat-conducting foam metal is greatly increased, and the smoke and the heat-conducting foam metal can perform sufficient heat exchange, so that the smoke temperature can be well reduced, and a better choice is provided for heating the non-burning cigarette filter stick.
Preferably, the pore diameter of the three-dimensional porous material is 0.1mm-0.3mm, the porosity of the three-dimensional porous material is 70% -98%, and the through porosity of the three-dimensional porous material is 70% -98%.
Preferably, the first end cigarette filter stick is made of acetate fiber materials.
Preferably, the three-dimensional porous material column is also loaded with essence or/and spice for improving the smoke richness of cigarettes, especially the smoke richness of cigarettes which are not combusted by heating.
Preferably, the three-dimensional porous material column is cylindrical; the first end cigarette filter rod is cylindrical; the cross section of the three-dimensional porous material column is circular, and the diameter of the circle is 4-8 mm; the length of the three-dimensional porous material column is 5-30 mm. In order to compound with the cigarette to form the cigarette, the cigarette filter stick of the invention is matched with the shape and the size of the cigarette, the cigarette filter stick of the invention is connected with the tobacco material section, the outer wall is formed and compounded by the forming paper, and then the cigarette is rolled to be the cigarette which is not combusted by heating.
Preferably, the tobacco smoke filter also comprises a second end tobacco filter stick, and the second end tobacco filter stick is connected with the other end of the three-dimensional porous material column.
According to the technical scheme, the cigarette filter stick made of the three-dimensional porous material is provided. The cigarette filter stick provided by the invention adopts a section of three-dimensional porous material column made of three-dimensional porous material with high porosity, high porosity and good heat conductivity. On one hand, the three-dimensional porous material column can ensure that the smoke is randomly diffused and transferred in the transverse direction and the longitudinal direction, thereby greatly prolonging the flow of the smoke from a heat source to a mouth end; meanwhile, the smoke is in full contact with the three-dimensional porous material, and due to the fact that the adopted three-dimensional porous material has excellent heat conducting performance, a large amount of heat in the smoke can be quickly transferred to the three-dimensional porous material, and the smoke temperature can be effectively reduced under the combined action of the two factors. Meanwhile, the three-dimensional porous material with large pores and high through-hole rate has low interception efficiency on the flue gas, and can effectively improve the concentration of the flue gas; the selected three-dimensional porous material simultaneously meets the requirement of no deformation under high-temperature heating, and the consistency and effectiveness of the filter tip structure in the suction process are ensured.
The cigarette filter stick has the following advantages:
1) the three-dimensional porous material is utilized, so that the interception efficiency of the cigarette filter stick to the smoke of the non-burning cigarette can be obviously reduced, and the smoke concentration of the non-burning cigarette can be improved;
2) the cigarette smoke temperature which is not burnt during heating can be well reduced by utilizing the good heat-conducting property of the three-dimensional porous material;
3) the application utilizes the good mechanical property of the three-dimensional porous material to ensure that the deformation does not occur in the cooling process, and solves the problem that the high polymer material of the existing cigarette filter stick is softened by heating;
4) the three-dimensional porous material can also be loaded with specific essence or/and spice to improve the smoke richness of cigarettes.
Drawings
Figure 1 is a structural drawing of a first cigarette filter in an embodiment of the present application;
figure 2 is a structural diagram of a second cigarette filter in an embodiment of the present application;
wherein, the three-dimensional porous material column 1, the first hollow acetate fiber filter rod section 2 and the second hollow acetate fiber filter rod section 3.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, a fixed connection, a detachable connection, or an integral connection unless otherwise explicitly stated or limited; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
It should be understood that, referring to fig. 1, fig. 1 is a structural diagram of a first cigarette filter stick in the embodiment of the present application, as shown in fig. 1, fig. 1 includes a three-dimensional porous material column 1, and the three-dimensional porous material column 1 is made of a three-dimensional porous material, wherein the pore size of the three-dimensional porous material is 0.1mm-1mm, the porosity of the three-dimensional porous material is 10% -98%, and the through porosity of the three-dimensional porous material is 20% -98%; the first end cigarette filter rod 2 is connected with one end of the three-dimensional porous material column 1 through the first end cigarette filter rod 2.
The first cigarette filter rod designed in the embodiment of the application is a binary composite filter rod and respectively comprises a three-dimensional porous material column 1 and a first end cigarette filter rod 2, the three-dimensional porous material column 1 is a foamed Cu-based material section, the first end cigarette filter rod 2 is a hollow acetate fiber filter rod section, the lengths of the hollow acetate fiber filter rod section and the foamed Cu-based material section are respectively 20 mm and 10 mm, the hollow acetate fiber filter rod section and the foamed Cu-based material section are cylindrical, and the diameters of the hollow acetate fiber filter rod section and the foamed Cu-based material section are both 7.71 mm. When the first cigarette filter stick is used with a smoking set in a matched mode, smoke firstly enters the foamed Cu-based material section, the flow direction of the smoke is changed, the smoke generates a turbulence effect and randomly diffuses in four directions towards the Cu-based material, meanwhile, due to the fact that the gaps of the foamed copper are large, the through hole rate is high, the smoke cannot generate a condensation filtering effect similar to that of a small-hole material, the filtering efficiency is low, meanwhile, the smoke freely diffuses and fully exchanges heat with the foamed Cu-based material, the smoke temperature is effectively reduced by 15 ℃, and the smoke concentration is guaranteed while the smoke temperature is effectively reduced. Finally, the smoke enters the oral cavity of a consumer from the hollow acetate fiber filter rod section, and good sensory experience is provided for the consumer.
Preferably, the first cigarette filter stick of the embodiment of the present application is compounded with a heat non-combustible cigarette, and the outer wall of the first cigarette filter stick is formed and compounded by wrap paper, and then is rolled to form the heat non-combustible cigarette.
Preferably, the three-dimensional porous material in the embodiment of the present application may be a thermally conductive metal foam, a thermally conductive porous ceramic, a thermally conductive porous graphite, or a thermally conductive graphene.
Selecting a three-dimensional porous material with the aperture of 0.1mm-1mm, the porosity of 10% -98% and the through porosity of 20% -98%, wherein the three-dimensional porous material can ensure that the smoke can be randomly diffused and transferred in the transverse direction and the longitudinal direction on one hand, and the flow of the smoke from a heat source to a mouth end is greatly prolonged; meanwhile, the smoke is in full contact with the three-dimensional porous material, and due to the fact that the adopted three-dimensional porous material has excellent heat conducting performance, a large amount of heat in the smoke can be quickly transferred to the three-dimensional porous material, and the smoke temperature can be effectively reduced under the combined action of the two factors. Meanwhile, the three-dimensional porous material with larger pores and higher through-hole rate has low interception efficiency on the flue gas, and can effectively improve the concentration of the flue gas; the three-dimensional porous material selected for use simultaneously meets the requirement of no deformation under high-temperature heating, and ensures the consistency and effectiveness of the filter tip structure in the suction process.
Preferably, the thermally conductive metal foam of the embodiment of the present application is copper foam, aluminum foam, or nickel foam.
Compared with the existing common sintered porous metal, the thermal conductive foam metal has higher porosity and larger pore size. The porosity of the foam metal is often over 90 percent, the pore diameter can reach millimeter level, and the foam metal has certain strength and rigidity. The smoke-retaining agent is applied to a heating non-combustible filter stick, has low smoke-retaining efficiency, can reduce the filtering effect on nicotine and flavor components in smoke to the maximum extent, and ensures the smoke concentration; meanwhile, the migration path of the smoke in the heat-conducting foam metal is greatly increased, and the smoke and the heat-conducting foam metal with good heat conductivity can perform sufficient heat exchange, so that the smoke temperature can be well reduced, and a better choice is provided for heating the non-burning cigarette filter rod.
More preferably, the pore diameter of the three-dimensional porous material in the examples of the present application is 0.1mm to 0.3mm, the porosity of the three-dimensional porous material is 70% to 98%, and the through porosity of the three-dimensional porous material is 70% to 98%.
Preferably, the first end cigarette filter stick of the embodiment of the application is made of acetate fiber material.
Preferably, the three-dimensional porous material column of the embodiment of the present application is also loaded with a perfume or/and fragrance.
Preferably, in order to match the shape and diameter of the cigarette, the three-dimensional porous material column in the embodiment of the application is cylindrical; the first end cigarette filter rod is cylindrical; the cross section of the three-dimensional porous material column is circular, and the diameter of the circle is 4-8 mm; the length of the three-dimensional porous material column is 5-30 mm.
Referring to fig. 2, fig. 2 is a structural diagram of a second cigarette filter stick in the embodiment of the present application, and as shown in fig. 2, fig. 2 includes a three-dimensional porous material column 1, where the three-dimensional porous material column 1 is made of a three-dimensional porous material, a pore diameter of the three-dimensional porous material is 0.1mm to 1mm, a porosity of the three-dimensional porous material is 10% to 98%, and a through porosity of the three-dimensional porous material is 20% to 98%; the first end cigarette filter rod 2 is connected with one end of the three-dimensional porous material column 1; the second end cigarette filter rod 3 and the second end cigarette filter rod 3 are connected with the other end of the three-dimensional porous material column 1.
The second cigarette filter rod designed in the embodiment of the application is a ternary composite filter rod and is respectively a three-dimensional porous material column 1, a first end cigarette filter rod 2 and a second end cigarette filter rod 3, wherein the first end cigarette filter rod 2 is a first hollow acetate fiber filter rod segment, the three-dimensional porous material column 1 is a foam Cu-based material segment, the second end cigarette filter rod 3 is a second hollow acetate fiber filter rod segment, the lengths of the three-dimensional porous material column 1, the first end cigarette filter rod 2 and the second end cigarette filter rod 3 are 10 mm, and the diameters of the three-dimensional porous material column 1, the first end cigarette filter rod 2 and the second end cigarette filter rod 3 are 7.71 mm. The outer wall of the second cigarette filter stick of the embodiment of the invention is formed and compounded by the wrap paper, and then the second cigarette filter stick is rolled into a cigarette which is not combusted by heating. When the filter is matched with a smoking set for use, smoke enters the foamed Cu-based material section after passing through the second hollow acetate fiber filter rod section, the flow direction of the smoke is changed, the smoke generates a turbulence effect and randomly diffuses in four directions towards the foamed Cu-based material, and meanwhile, due to the large gaps and high through-hole rate of the foamed copper, the smoke cannot generate a condensation filtering effect similar to that of a small-hole material, and the filtering efficiency is low; meanwhile, the smoke gas is subjected to full heat exchange with the foam Cu-based material during free diffusion, the smoke gas temperature is effectively reduced by 10 ℃, and the smoke gas temperature is effectively reduced while the smoke gas concentration is ensured. Finally, smoke enters the oral cavity of a consumer from the first end cigarette filter stick 2, and good sensory experience is provided for the consumer.
The embodiment of the invention also provides a method for detecting the smoke temperature, the nicotine interception efficiency and the deformation of cigarettes formed by compounding the filter sticks with the numbers 1-5 with the heated non-combustible cigarettes, and the results are shown in the table 1. Wherein the foam copper with the serial number of 1-3 is purchased from Kunshan Guangjia source new material company Limited; the ceramic foam of serial No. 4 was purchased from shanxi koryan environmental protection materials ltd.
The three-dimensional porous material of the cigarette filter stick of the number 1 is foam copper, the aperture of the three-dimensional porous material of the number 1 is 0.1mm, the porosity is 50%, and the through porosity is 50%.
The three-dimensional porous material of the cigarette filter stick of the serial number 2 is foam copper, the aperture of the three-dimensional porous material of the serial number 2 is 0.5mm, the porosity is 85 percent, and the through porosity is 90 percent.
The three-dimensional porous material of the cigarette filter stick of the number 3 is foam copper, the aperture of the three-dimensional porous material of the number 3 is 1mm, the porosity is 98%, and the through porosity is 98%.
The three-dimensional porous material of the cigarette filter stick of the serial number 4 is foamed ceramic, the aperture of the three-dimensional porous material of the serial number 4 is 0.5mm, the porosity is 70%, and the through porosity is 85%.
The cigarette filter rod with the serial number 5 is a hollow cigarette filter rod, the aperture of the hollow cigarette filter rod with the serial number 5 is 5.5mm, and the hollow cigarette filter rod is not provided with through holes and gaps, so that the nicotine interception efficiency cannot be detected.
TABLE 1
As can be seen from the data in Table 1, the cigarette filter stick provided by the invention has the advantages of low smoke temperature, high nicotine interception efficiency and no deformation. Wherein, the control sample adopts a hollow cigarette filter stick, the flow rate of smoke is high, the retention time in the filter stick section is short, the cooling effect is poor, and the temperature of the smoke is high and reaches 42.1 ℃; the three-dimensional porous material is adopted as the filter material, so that the smoke temperature can be reduced to different degrees, and when the aperture is 0.5mm, the porosity is 85 percent, and the through porosity is 90 percent, the smoke temperature can be reduced to 35.2 ℃ by taking the foam copper as an example. The pore size, porosity and through porosity of the copper foam also have different influences on the reduction range of the temperature of the flue gas. When the pore diameter of the foam copper is small, the porosity is low, and the through porosity is low, the flow of the smoke in the three-dimensional porous material is short, the smoke cannot be subjected to sufficient heat exchange with the material, and the temperature of the smoke is higher than that under the optimal condition; when the pore diameter of the foamy copper is large, the porosity is high, and the through hole ratio is large, the smoke flow direction is not easy to change, the turbulence effect is weak, particularly, the smoke cannot be cut into a plurality of strands of thin flows, the contact with materials is insufficient, and the smoke temperature is higher than that under the optimal condition.
The terms "first," "second," "third," "fourth," and the like in the description of the application and the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that, in this application, "at least one" means one or more, "a plurality" means two or more. "and/or" is used to describe the association relationship of the associated object, indicating that there may be three relationships, for example, "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.
Claims (7)
1. A cigarette filter stick is characterized by comprising:
a three-dimensional porous material column made of a three-dimensional porous material, wherein the pore size of the three-dimensional porous material is 0.5mm, the porosity of the three-dimensional porous material is 85%, and the through porosity of the three-dimensional porous material is 90%; the three-dimensional porous material is foam copper;
the first end cigarette filter rod is connected with one end of the three-dimensional porous material column.
2. The cigarette filter rod of claim 1, wherein the first end cigarette filter rod is made of an acetate fiber material.
3. The cigarette filter according to claim 1, wherein the three-dimensional porous material column is further loaded with flavors or/and fragrances.
4. The cigarette filter rod of claim 1 wherein the three-dimensional porous material column is cylindrical; the first end cigarette filter stick is cylindrical.
5. The cigarette filter stick according to claim 4, wherein the cross section of the three-dimensional porous material column is circular, and the diameter of the circle is 4-8 mm.
6. The cigarette filter rod according to claim 1, wherein the three-dimensional porous material column is 5-30mm long.
7. The cigarette filter according to any one of claims 1 to 6, further comprising a second end cigarette filter, the second end cigarette filter being connected to the other end of the three-dimensional porous material column.
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| CN201811592960.6A CN111358048B (en) | 2018-12-25 | 2018-12-25 | Cigarette filter stick |
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| CN104697373A (en) * | 2015-03-17 | 2015-06-10 | 东南大学 | Foam metal heat exchange structure |
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| CN102144812A (en) * | 2011-05-10 | 2011-08-10 | 袁继发 | Ceramic cigarette filter stick |
| CN104720105B (en) * | 2015-02-11 | 2018-01-30 | 浙江中烟工业有限责任公司 | Composite of aldehyde material and its preparation method and application in a kind of selectivity reducing cigarette fume |
| CN204599318U (en) * | 2015-04-17 | 2015-09-02 | 成都易态科技有限公司 | Cigarette filter |
| US11006664B2 (en) * | 2015-08-09 | 2021-05-18 | Jinan Shengquan Group Share Holding Co., Ltd. | Graphene adsorbing material, preparation method therefor and application thereof, and cigarette filter tip and cigarette |
| CN105597675A (en) * | 2015-12-31 | 2016-05-25 | 济南圣泉集团股份有限公司 | Graphene adsorbing material, preparation method and application thereof and cigarette filter tip |
| CN106036999A (en) * | 2016-08-08 | 2016-10-26 | 普瑞特机械制造股份有限公司 | Compound cigarette filter tip |
| CN107772530B (en) * | 2016-08-24 | 2022-06-21 | 贵州中烟工业有限责任公司 | Composite cigarette filter tip for improving cigarette taste and application |
| CN206923661U (en) * | 2017-06-28 | 2018-01-26 | 湖南中烟工业有限责任公司 | A kind of cigarette filter |
| CN108361475A (en) * | 2018-01-17 | 2018-08-03 | 云南靖创液态金属热控技术研发有限公司 | A kind of heat shield containing liquid metal |
| CN109007970B (en) * | 2018-09-13 | 2021-04-20 | 广东中烟工业有限责任公司 | Cigarette filter stick capable of improving smoke moistening feeling and cigarette prepared from cigarette filter stick |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104697373A (en) * | 2015-03-17 | 2015-06-10 | 东南大学 | Foam metal heat exchange structure |
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