JP2014511675A - Smoking goods - Google Patents

Abstract

  A smoking article comprising a filter section including a first filter media region for removing particulate matter from a smoke stream, wherein the smoking article rod is configured to improve heat transfer to the first filter media region. .

Description

  The present invention relates to smoking articles, and in particular to modifying the smoke of smoking articles.

  Smoking articles containing smoke modifiers are known in the art. Examples include absorbents or adsorbents located in the filter section or tobacco rod of a smoking article. The particulate filter absorbs smoke components contained in the particulate phase of the smoke stream. It is known to contain an adsorbent in some cases and adsorb smoke components that move to the vapor phase of the smoke stream.

  Such absorbents and adsorbents remove smoke components from the smoke stream as it passes through the smoking article, but the configuration of the smoking article has not yet reached the control of the smoke temperature distribution. Thus, the smoke component is not removed when it is desirable to remove it.

  In one embodiment of the present invention, a smoking article is provided that includes a filter section that includes a filter media region for removing particulate matter from a smoke stream, the smoking product improving heat transfer to the first filter media region. It is configured as follows.

  In one embodiment, a smoking material rod is provided that is wrapped in a wrapper and configured to form a embroidery when lit at one end thereof, the wrapper having a heat conducting strip affixed thereto. This improves the heat transfer from the burner to the first filter medium region.

  The smokable rod may have at least one groove extending across the rod to improve heat transfer from the burner to the first filter media region.

  The at least one groove may include a plurality of grooves arranged radially around the smokable rod.

  In one embodiment, the smoke stream is cooled downstream of the first filter media region, for example by a cooling chamber. A region of adsorbent material may be provided in the cooling chamber or downstream thereof.

  Perforations for cooling the smoke may be provided in the wrapper surrounding the filter section.

  For example, a diluent may be provided downstream of the first filter medium region.

  The smokable rod may comprise a pelleted tobacco mixture and may further comprise carbon.

  The second filter medium area may be provided downstream of the first filter medium area, and the filtration efficiency of the second filter medium area is lower than the filtration efficiency of the first filter medium area.

  The first filter media region may have a retention value greater than 30 percent or greater than 70 percent.

  In the smoking article, the first filter medium region removes only a substance having a boiling point of a predetermined height or higher, for example, a boiling point of about 250 ° C., 300 ° C., 350 ° C., 400 ° C., 450 ° C. or 500 ° C. You may comprise.

  In order that the present invention may be more fully understood, certain embodiments will now be described by way of example only, with reference to the accompanying drawings, in which:

1 is a vertical cross-sectional view of a smoking article according to one embodiment of the present invention. FIG. 6 is a vertical cross-sectional view of a smoking article according to another embodiment of the present invention. FIG. 6 is a vertical cross-sectional view of a smoking article according to another embodiment of the present invention. FIG. 6 is a vertical cross-sectional view of a smoking article according to another embodiment of the present invention. FIG. 6 is a vertical cross-sectional view of a smoking article according to another embodiment of the present invention. FIG. 6 is a vertical cross-sectional view of a smoking article according to another embodiment of the present invention. 1 is an end view of a smoking article according to one embodiment of the present invention. FIG. 1 is a plan view of a tobacco rod wrapper according to an embodiment of the present invention. FIG. FIG. 6 is an end view of a smoking article according to another embodiment of the present invention.

  FIG. 1 illustrates a cylindrical cigarette 10 according to one embodiment of the present invention. The cigarette 10 includes a tobacco rod 15 and a filter section 20. Although the tobacco rod 15 and the filter section 20 shown in FIG. 1 are attached to each other by the chipping paper 25, other means for attaching the tobacco rod to the filter section known in the art are adopted. May be. The filter section 20 is longer than the filter section 20 and is wrapped with a tipping paper 25 that connects the tobacco rod 15 to the filter section 20 in a manner well known in the art.

  The tobacco rod 15 shown in FIG. 1 may be shorter than conventional tobacco rods well known in the art. The tobacco rod 15 may be formed from recycled tobacco or pelletized tobacco surrounded by a wrapper 26. The wrapper 26 may be formed from any paper known in the art suitable for wrapping tobacco rods. The wrapper 26 may have a natural air permeability of 0 to 25 coresta units (hereinafter referred to as CU), but preferably has an air permeability of 2 to 10 CU. Electrostatic perforation may be used to increase the air permeability.

  The length of the tobacco rod may be 10 to 50 millimeters (hereinafter referred to as mm), but a length of 30 to 40 mm is preferable. The circumference of the tobacco rod 15 may be 14 to 28 mm, but a circumference of 17 to 25 mm is preferred.

  A binder may be added to the tobacco during the manufacture of the tobacco rod 15 to facilitate handling of the tobacco and form it into a rod. Particulate carbon, such as activated carbon or other carbon-based additives known in the art, may be added to the tobacco, which makes the tobacco rod 15 easier to handle, promotes combustion and increases the heat of combustion, and is also specified It is also known to act as an adsorbent for other smoke components.

  The wrapper 26 surrounding the tobacco rod 15 is made from low air permeability paper, but packaging materials other than paper known in the art may be used. It is known that the air permeability or porosity of an object affects its burning rate. Accordingly, the low air permeability of the wrapper 26 ensures that the tobacco rod 15 burns more slowly than the tobacco rod wrapped in the high air permeability wrapper. If the tobacco rod 15 is shorter than conventional tobacco rods known in the art, the slower the burning rate, the more times the user will inhale or puff from the cigarette 10 during use.

  In addition to the chipping paper 25, the filter section 20 of the cigarette 10 may be wrapped with a plug wrapper 27. The air permeability of the plug wrapper 27 may be from 0 to 2000 cholesterol units.

  The filter section 20 includes a region of material 30 with high filtration efficiency (hereinafter referred to as FE). The region of high FE material 30 is located at the upstream end of the filter section 20 and is adjacent to the tobacco rod 15. The high FE material 30 may exhibit thermal resistance when exposed to high temperatures, and may be a Cambridge filter pad formed from fiberglass. The high FE material 30 may include materials such as zeolite that can selectively remove individual smoke components. The length of the high FE material region may be 1 to 15 mm. The filtration efficiency and / or retention value of the high FE material must be selected so that the particulates can be filtered at a high level. The retention value of some embodiments of the present invention is greater than 30%, preferably greater than 70% of the granulate, but the present invention is greater than 40%, greater than 50%, greater than 60%, greater than 80% and / or Alternatively, retention values exceeding 90% are also effective.

  Since the area of the high FE material 30 is likely to become hot during use, a heat insulating layer 31 is provided between the high FE material 30 and the chipping paper 25 to reduce the risk of user burns when touching the filter section 20. May be.

  A diluent retaining agent 35 or aerosol forming agent may be disposed in the region of the high FE material 30. Diluent retention material 35 may include glycerol, although other diluents known in the art may be used as well. Diluent retention agent 35 provides another means for modifying the smoke content by introducing other ingredients and diluting the smoke aerosol.

  Alternatively, the diluent holding material 35 may be disposed in the cooling chamber 40 downstream of the high FE material 30 region. Yet another dilution zone may be located further downstream of the filter section 20. The cooling chamber 40 shown in FIG. 1 provides a space for circulating and cooling the smoke as it moves downstream. The length of the cooling chamber 40 may be 10 to 30 mm.

  Further downstream of the cooling chamber 40 is a region of the low FE material 45. The low FE material 45 may be formed from cellulose acetate yarn, but other low FE filter media known in the art may be used. The low FE material 45 is formed in a plug that absorbs smoke components passing therethrough. The length of the region of the low FE material 45 may be 10 to 30 mm.

  An adsorptive material 50 that adsorbs smoke components may be disposed in the region of the low FE material 45. Suitable adsorbent materials include activated carbon particles, carbon shells or other materials known in the art to adsorb smoke components.

  The mouth end 55 of the filter section is located at the mouth end 60 of the smoking article 10. The length of the mouth end of the filter section may be 5 to 15 mm. The filter section mouth end 55 may be formed of a plug of a low FE filter material that does not contain an adsorbent material inside. The mouth end 55 of the filter section prevents the adsorbent material 50 from contacting the user's mouth. Although not shown in FIG. 1, flavoring agents may be included at the mouth end 55 of the filter section. This has the effect of offsetting the taste changed by the adsorbent material 50.

  The chipping paper 25 is provided with a gap 65 along its length to allow air to permeate into the filter section 20 and discharge some smoke components from the filter section 20.

  Another embodiment of the cigarette 10 is shown in FIG. The filter section 20 is substantially the same as the filter section 20 shown in FIG. A through hole 70 extends along the longitudinal axis of the tobacco rod 15. The through-hole 70 provides a path for moving smoke from the burner 75 to the area of the high-FE filter medium 30 downstream. The diameter of the through hole 70 is 1 to 3 mm. A plurality of through holes substantially parallel to each other may be provided. The through hole 70 facilitates heat transfer to the filter section 20.

  Forming the tobacco rod 15 from a mixture of tobacco and carbon extruded or compressed as described above with reference to FIG. 1 facilitates the formation of the through hole 70. This is because this mixed material helps to maintain the outer shape and shape of the through hole. A binder such as guar rubber or adhesive material can be added to cut the tobacco to help maintain the shape of the through hole.

  A cigarette 10 similar to that shown in FIG. 2 but with a modified filter section 20 is shown in FIG. A gap such as the gap 65 shown in FIG. 2 is not provided in the chipping paper 25. The air passes through the chipping paper 25 and the plug wrapper 27 which are natural porous. Similarly, some components of the smoke can permeate out of the filter section 20.

  A cigarette 10 having another configuration of filter section 20 similar to that shown in FIG. 1 is shown in FIG. In this embodiment, the adsorbent material 50 is included in the cooling chamber 40, which is granular that fills or substantially fills the cooling chamber cavity.

  When the user ignites the cigarette 10 shown in FIG. 1, a burner 75 is formed at the location where the tobacco rod 15 and the wrapper 26 burn around the tobacco rod 15. A smoke stream is formed and when the user sucks through the mouth end 55 of the filter section, a pressure difference is created and moves toward the filter section 20.

  The smoke stream is formed from various components, each present in the vapor phase and / or the particulate phase. The amount of each smoke component present in each phase depends on the temperature of the smoke. The proportion of the particulate smoke component present in the vapor phase increases with increasing temperature.

  As smoke moves downstream through the tobacco rod 15 toward the filter section 20, the smoke will move from the embers 75, thus lowering the temperature of the smoke. This degree of smoke temperature reduction can be reduced by various factors such as changing the downstream flow of smoke. This smoke flow is affected by using a short slim tobacco rod, or by reducing the tobacco flow resistance through a groove or through hole and using a low air permeability wrapper around the tobacco rod. Another important factor is the use of thermally conductive materials and reducing the thermal mass of the tobacco rod.

  When the smoke reaches the high FE material region 30, most of the constituents that have migrated within the particulate phase are removed from the smoke stream. The constituents in the granular phase have a higher boiling point than the constituents that move through the vapor phase. Accordingly, a relatively small amount of vapor phase is necessarily removed from the smoke stream by the high FE material 30. However, some of these components may also be eluted from the high FE filter medium 30 when smoke is subsequently drawn through the filter section 20.

  The smoke stream passes through a diluent carrier 35 that further dilutes the smoke by adding components to the smoke aerosol. As described above, the diluent holding agent 35 may be disposed in the high FE material region 30 or in the cooling chamber 40.

  Inside the cooling chamber 40, the smoke cools and the temperature drops. As the smoke cools, the various constituents previously contained in the vapor phase condense into a granular phase.

  The speed at which the smoke cools is affected by the placement of all perforations, such as the gap 65 in the tipping paper 26, and the natural ventilation of the tipping paper 25 and the plug wrapper 27 as the smoke is ventilated with ambient air. The length of the gap 65 may be 1 to 30 mm.

  As will be appreciated by those skilled in the art, the choice of tipping paper 25 and plug wrapper 27 is important as it will well regulate the cooling of the smoke and the proportion of components in the vapor and particulate phases. .

  As smoke enters the region of low FE material 45, the constituents of the particulate phase are removed. The amount of particulate material removed from the smoke stream in the region of low FE material 45 is less than the amount removed in region 30 of high FE material because the filtration efficiency of region 45 is less than region 30.

  An adsorbent material 50 such as activated carbon or other adsorbent known in the art for smoke components may be placed in the region of the low FE material 45. The adsorptive material 50 mainly removes smoke components in the vapor phase.

  Eventually, the smoke stream is drawn through the mouth end 55 of the filter section. The mouth end 55 of the filter section includes a plug made of low FE material. The filter section mouth end 55 may be impregnated with flavors of the type known in the art, particularly when carbon or other such adsorbent is used upstream.

  FIG. 5 shows another filter configuration. The filter section 20 includes a region of an annular high FE material 80 located where the tobacco rod 15 abuts the filter section 20. A region of an intermediate FE material 85 is provided downstream of the annular filter section 80. The region of the high FE material 80 and the region of the intermediate FE material 85 may be wrapped with the heat conductive material 90, and further may be wrapped with the heat insulating material 95.

  A filter having substantially the same configuration as that described above with reference to FIG. 1 is provided downstream of the intermediate FE material 85. The FE of the region 85 is higher than the FE of the region 45 and is lower than the FE of the region 80.

  Prior to use, the center of the annular region 80 forms a longitudinal through-hole 86 extending along the length of the annular region 80, the width of which is about 0.1 to 2 mm. During use, certain smoke components accumulate in the central through-hole 86, resulting in at least partial blockage of the through-hole 86 with respect to the smoke component.

  Therefore, during the first and third aspirations, for example, when the filter area 80 is not yet hot and the tobacco rod 15 is the longest, the pressure drop in the filter area 80 is such that the filter area 80 becomes hot and the tobacco rod 15 It burns at least partly and is therefore less than the pressure drop during suction when it is shortened. Smoke passing through the filter area 80 after the first few suctions will therefore contain different proportions of the specific smoke component of the smoke passing through the area 80 after subsequent suction. This is because smoke that is sucked through the region 80 during the initial suction will move through the central through-hole 86 and is not substantially filtered by the region 80. However, the smoke from the subsequent suction is forced to pass through the filter medium located on the outer ring of the annular region 80. It will be apparent to those skilled in the art that other filter regions 80 having different shapes or compositions may be employed.

  In the cigarette 10 shown in FIG. 5, the region of the low FE filter medium 45 may be wrapped with a high porosity plug wrapper 96 between the region 45 and the plug wrapper 27, and the porosity of this wrapper is the porosity of the wrapper 96. May be similar. The mouth end 55 of the filter section may be wrapped with a plug wrapper 97 having a porosity that is less than the porosity of the plug wrapper 96 that wraps the region of the low FE filter media 45.

  Additional modifications may be added to the various components of the filter section 20 in combination or separately. For example, the plug wrapper 27 surrounding the cooling chamber 40 may be impregnated with an aerosol forming material such as glycerol, or an inner layer made of a material capable of holding the aerosol forming material may be added.

  FIG. 6 shows a cigarette 10 according to yet another embodiment. The cigarette 10 is similar to that shown in FIG. 1, but an annular washer 100 is located upstream of the region of the high FE material 30. The washer 100 concentrates or guides the smoke stream so that it strikes the region 30 of high FE material and maintains the speed of the smoke stream to help minimize heat loss. The region of the high FE material 30 and the washer 100 may be wrapped with a thermally conductive material 90, and this may be wrapped with a heat insulating material 95.

  The washer 100 may be formed from a conductive material, thereby improving heat transfer to the filter section 20. The cooling chamber 40 is shaped to provide a pressure gradient to facilitate the formation of aerosol. Alternatively, the cooling chamber 40 may be at least partially filled with an adsorbent material such as carbon.

  The wrapper 26 shown in FIGS. 1-6 may have additional heat transfer means extending along its length. 7 and 8 show the heat conducting strip 110. The heat transfer strip can conduct heat from the burner 75 shown in FIGS. 1 to 6 to the area of the high FE material 30, 80, where the smoke temperature exits the tobacco rod 15 and enters the filter section 20. To raise. The thermally conductive strip 110 may be made of metal or comprise a suitable conductive material.

  Separately or in addition to the strip 110 shown in FIGS. 7 and 8, a backing paper located inside the wrapper 26 or a laminate with the wrapper 26 may be included, both of which are made of aluminized paper. It may be of a shape.

  Alternatively, the heat conducting strip 110 shown in FIGS. 7 and 8 may have a heat conducting groove 115 formed along the length of the tobacco rod 15. Smoke may be sent from the embers 75 along these grooves 115 to the filter section 20 that reduces heat loss. The strip may be formed from paper, recycled tobacco or any suitable material apparent to those skilled in the art. The strip may be provided on the wrapper 26 before or after the wrapper 26 is wound on the tobacco rod 15. FIG. 8 shows the wrapper 26 with the strip 110 applied before being wrapped around the tobacco rod 15. The strip 110 may extend along a portion of the length of the tobacco rod 15 or along the entire length of the tobacco rod 15. Alternatively, as shown in FIG. 9, the groove 115 may be formed by providing a corrugated inner wrapper material 120 between the wrapper 26 and the tobacco rod 15.

  7 and 9 show the end face of the cigarette 10 without the through hole 70, such a through hole 70 may be provided in accordance with various embodiments of the present invention.

  Modifications to alter the temperature distribution of the smoke passing through the length of the cigarette 10 and the order of the components of the cigarette 10 without departing from the scope of the invention as defined in the appended claims Can do.

  Of course, the above description refers to cigarettes, but other smoking articles known in the art are equally applicable within the scope of the present invention.

Experimental Data The temperature distribution of cigarette smoke similar to the cigarette 10 shown in FIG. 1 was analyzed. This cigarette differs from the cigarette 10 shown in FIG. 1 in that the filter section does not include diluents, adsorbents and ventilation gaps. The smoke components measured are granular nicotine, granular water, tar (NFDPM), benzo (a) pyrene (B (a) P) and catechol. The table also shows the ratio of B (a) P to NFDPM, the ratio of catechol to NFDPM, and the number of puffs or suctions from each cigarette. The cigarette according to the present invention was compared with two control cigarettes and the results are shown in the table below. The cigarette was aspirated at 55 cubic centimeters for 2 seconds, and the interval between aspirations was analyzed and investigated at 30 second intervals.

  An exemplary cigarette according to the present invention and Control 1 and Control 2 contained the same tobacco blend, tobacco rod and filter of the same length. The cigarette labeled Control 1 contained a conventional cellulose acetate filter with a ventilation gap so that the total particulate matter (TPM) was consistent with the cigarette of the present invention. The cigarette used as control 2 was similar to the cigarette of the present invention, but the high FE filter medium 30 region was replaced with a low efficiency cellulose acetate filter. In the cigarette of the present invention, a high FE material was produced from glass fiber.

  The results shown in the table above relate to B (a) P and the ratio of catechol to NFDPM, with the cigarette according to the present invention being smaller than any of the control cigarettes. B (a) P and catechol have a relatively high boiling point and are therefore removed in that particular phase by the high FE filter portion.

  Embodiments of the present invention can thus be configured to adjust the amount of smoke component based on its relative boiling point. For example, the region of the high FE filter of embodiments of the present invention may have a relatively high boiling point, for example, a boiling point above a certain temperature, such as a temperature in the range of 250 ° C, 300 ° C, 350 ° C, 400 ° C, 450 ° C or 500 ° C Only smoke components having boiling points above can be used to selectively remove. Such constituents appear in the granular phase when passing through the high FE filter regions 30, 80, 85.

  By cooling the smoke in the cooling chamber 40, the low FE filter media 45 with the adsorbent material 50 according to certain embodiments of the present invention has a relatively low boiling smoke component, about 300 ° C, 250 ° C, 200 ° C. , Components having boiling points below 150 ° C. or 100 ° C. can be selectively removed.

In order to address various issues and improve the present technology, the entire disclosure has shown various embodiments by way of explanation. Among these embodiments, the claimed invention is implemented to provide an excellent method of imparting sensory irritation to a recipient product using a sensory substance obtained from the supplier product. . The advantages and features of the present disclosure are only representative examples of embodiments and are not intended to be exhaustive or limited thereto. They are presented merely to aid understanding and to teach the features defined in the claims. It will be appreciated that the advantages, embodiments, examples, functions, features, structures, and / or other aspects of the disclosure are limited to or limited by the disclosure as defined by the claims. Rather than being considered limited to equivalents, other embodiments may be utilized or modified without departing from the scope of the disclosed concept. Various embodiments may comprise, consist of, or basically consist of various combinations, elements, components, features, parts, steps, means, etc. of the present disclosure. . The disclosure also includes other inventions that are not currently claimed but that may be claimed in the future.

Claims (22)

A smoking article comprising a filter section including a first filter medium region for removing particulate matter from a smoke stream,
The smoking article is configured to improve heat transfer to the first filter medium region.   A smoking material rod wound around the wrapper and configured to form a embroidery when fired at one end, the wrapping material having a heat-conducting strip affixed thereto, from the embers to the first filter medium The smoking article according to claim 1, wherein heat transfer to the region is improved.   The smoking article according to claim 2, wherein the smoking material rod includes at least one groove extending over the entire rod to improve heat transfer from the burner to the first filter medium region.   The smoking article according to claim 3, wherein the at least one groove is a plurality of grooves radially arranged around the smoking material rod.   The smoking article according to any one of claims 1 to 4, further comprising means for cooling the smoke stream downstream of the first filter medium region.   6. A smoking article according to claim 5, wherein the means for cooling the smoke is a cooling chamber.   7. A smoking article according to claim 6, further comprising an adsorbent region in or downstream of the cooling chamber.   8. A smoking article according to any one of claims 5 to 7, wherein the means for cooling the smoke comprises a perforation of a wrapper surrounding the filter section.   8. A smoking article according to any one of claims 5 to 7, wherein the means for cooling the smoke comprises at least one gap in a wrapper surrounding the filter section.   The smoking article according to any one of claims 1 to 9, further comprising a diluent.   The smoking article according to claim 10, wherein the diluent is downstream adjacent to the first filter medium region.   The smoking article according to any one of claims 2 to 11, wherein the smoking material rod includes a pellet-like tobacco mixture.   The smoking article according to any one of claims 2 to 12, wherein the smoking material rod contains carbon.   14. A smoking article according to any one of the preceding claims, wherein the filter section is configured to change the composition of the smoke stream when the smoking article is smoked.   15. The smoking article according to claim 14, wherein the first filter medium region forms a ring around the through hole that becomes an obstacle when the smoking article is smoked.   16. A smoking article according to any one of the preceding claims, wherein the filter section is configured to guide smoke flow to the first filter media region.   The filter medium further comprising a second filter medium region downstream of the first filter medium region, wherein the second filter medium region has a filtration efficiency lower than that of the first filter medium region. Smoking article listed.   The smoking article according to any one of claims 1 to 17, wherein the first filter medium region is wound with a heat insulating material.   The smoking article according to any one of claims 1 to 18, wherein the first filter medium region has a retention value of more than 30 percent.   20. A smoking article according to any one of the preceding claims, wherein the first filter media region has a retention value greater than 70 percent.   21. The smoking article according to any one of claims 1 to 20, wherein the first filter medium region is configured to remove only a substance having a boiling point higher than a predetermined boiling point.   The smoking article according to claim 21, wherein the predetermined boiling point is any of about 250 ° C, 300 ° C, 350 ° C, 400 ° C or 500 ° C.

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