JP2016105718A - Tobacco smoke filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tobacco smoke filter including an outer wrapper engaged around a single longitudinally-extending core of a tobacco smoke filtering material.SOLUTION: A tobacco smoke filter 1 or filter element comprises an outer wrapper 3 engaged around a single longitudinally-extending core of tobacco smoke filtering material 5, where a first end 3a of the outer wrapper 3 is substantially flush with a first end 5a of the core 5 around which the outer wrapper 3 is engaged, and a second end 3b of the outer wrapper 3 extends beyond a second end 5b of the core 5 around which the outer wrapper 3 is engaged, to define a cavity 6 at the second end of the filter. The filter 1 or filter element further comprises an additive 11 distanced from the second end 3b of the outer wrapper 3 and/or the second end 5b of the core.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a filter and filter element for a smoking device such as tobacco.

  Recess filters are well known in the tobacco industry and provide a unique end view that is unique to tobacco. These are generally produced by wrapping a relatively stiff plug wrap around a continuous stream of filter sections at a distance. A recess filter can be obtained by cutting the filter flow in an area where there is no filter section (element). A hard plug wrap provides sufficient hardness to be able to be produced into a finished tobacco and used without the exposed paper edge of the filter being crushed.

  A recess filter can include one, two or more filter sections. If it is desired to include activated carbon or other particulate additives in the filter, it is common to have at least two sections, i.e., a smoker with a bare white edge (in a recess or cavity). The section closest to the mouth end, including cellulose acetate, and the section closest to the tobacco column, typically including carbon (or other) grains interspersed within the fibrous matrix. It will be necessary. The need to use at least two sections to include the particulate additive in the recess increases complexity and manufacturing cost of the carbon recess filter. This is because it limits the weight of carbon that can be included in a section having carbon, such as a two-section filter. Further, if the above limit is exceeded, an increase in the pressure drop of the filter leads to unsatisfactory smoking characteristics, so it is closely related to, for example, a conventional two-section ultra-fine type (for example, circumference 16 mm) activated carbon-containing recess filter. Yes. There is a need for a recess filter that overcomes these problems.

International Publication No. 2006/059134 Pamphlet British Patent 2,261,152

In accordance with the present invention, a tobacco smoke filter (or filter element) comprising an outer wrapping engaged around a single longitudinal core of tobacco smoke filtering material, the first end of said outer wrapping paper. Is substantially flush with a first end of the core with which the outer web is engaged, and a second end of the outer web is a second of the core with which the outer web is engaged. Extending beyond the end, forming a cavity (eg, cylindrical) at the second end of the filter,
The filter (or filter element) further includes an additive (eg, a particulate additive) spaced from the second end of the outer web and / or the second end of the core. The radially inner surface of the outer web extending beyond the second end of the core with which the outer web is engaged is at the second end of the recess filter (e.g., with the second end of the core extending in the longitudinal direction). ) A cavity or recess may be formed, for example a cylindrical cavity / recess at the second end of the filter.

  The particulate additive is not visible from the second end of the wrapping paper and / or core because it is away from the second end of the wrapping paper and / or core.

  In one embodiment, the single longitudinally extending core of the tobacco smoke filter material is a cigarette in which an additive (eg, particulate additive) is completely encapsulated (embedded) in one or (at least one) pocket. Includes a rod-like core of smoke filter material. The rod-shaped core of tobacco smoke filtration material may optionally have additional wrapping paper (eg, porous or non-porous) engaged around the rod-shaped core. Providing a pocket in which the additive in the core of the tobacco smoke filter material is fully enclosed is because the tobacco smoke filter material is between the additive pocket and the core end. The result is that the additive is released from the second end.

  A single longitudinally extending core of tobacco smoke filtration material is near the first end (eg, tobacco end of a filter cigarette) and away from the second end (eg, mouth or mouth end) In a single pocket (eg, a particulate additive). A single longitudinally extending wick of tobacco smoke filtration material has a first end of a wick (eg, tobacco end of a filter cigarette) and a second end of the wick (eg, the core closest to the mouth or mouth end of the filter cigarette). May be completely encapsulated (eg, embedded) in a single pocket of additive (eg, particulate additive) disposed at the same distance as the edge. A single longitudinally extending core of tobacco smoke filtration material may be completely enclosed in one or more (eg, 2, 3, 4) separate pockets of the additive (eg, particulate additive). The pocket in which the additive is completely encapsulated (or embedded) may be tapered toward one or both ends, for example, a normal oval shape. If there is more than one additive, they may be arranged at regular intervals in the longitudinal direction. Other pocket arrangements are also possible that can be achieved by appropriate adjustment of the manufacturing process, for example alternating with longer intervals and relatively shorter longitudinal intervals. A single longitudinally extending core of tobacco smoke filtration material comprising a rod-shaped core of tobacco smoke filtration material fully encapsulated (or embedded) within (or at least one) pocket of an additive (eg, particulate additive) Can be produced, for example, by the method or apparatus disclosed in WO 2006/059134.

Thus, in accordance with the present invention, a tobacco smoke filter is provided that comprises an outer wrapping paper that is engaged around a single longitudinal core of tobacco smoke filtration material.
A single longitudinally extending core of tobacco smoke filtration material is a rod-shaped core of tobacco smoke filtration material completely enclosed (embedded) within one or (at least one) pocket of additive (eg, particulate additive) It comprises.
The first end of the outer web is substantially flush with the first end of the core around which the outer web engages, and the second end of the outer web is the second end of the filter. The outer web extends beyond the second end of the core that engages the periphery so as to form a cavity. The rod-shaped core of tobacco smoke filtering material has an additional wrapping paper engaged around the rod-shaped core. A radially inner surface of the outer web that extends beyond the second end around the core with which the outer web engages is disposed on the second end of the filter (e.g., the length of the core extending in the longitudinal direction). Along with the second end, a cavity or recess is formed, for example a cylindrical cavity / recess.

  In another embodiment, a single longitudinally extending wick of the tobacco smoke filter material engages the rod wick of tobacco smoke filter material and the periphery of the rod wick, and an additive (eg, particulate additive) The wrapping paper having the additive has an additive attached to one or more portions of the radially inner surface, and the circumference of the wrapping paper at the second end of the core There is no such additive over time. The fact that there is no additive at the second end of the wrapping paper having an additive (for example, a fine particle additive) means that the second end of the wick (because there is no additive around the wrapping paper circle at the second end of the wick). There is an effect that the additive is separated from the end. Preferably, the wrapping paper having the additive has no additive over the circumference of both the first and second ends of the core. A core extending in the longitudinal direction of the tobacco smoke filtering material comprises a wrapping paper having the rod-shaped core of tobacco smoke filtering material and an additive (for example, a fine particle additive) engaged around the rod-shaped core, and the tobacco smoke filtration A single longitudinally extending core of material may be the filter element disclosed in GB 2261152. A package having the additive (eg, particulate additive) may be porous or non-porous.

Thus, according to the present invention, a tobacco smoke filter provides a tobacco smoke filter comprising an outer wrapping engaged around a single longitudinally extending core of tobacco smoke filtering material, wherein the outer wrapping of the outer wrapping paper is provided. The first end is substantially flush with the first end of the core around which the outer web is engaged, and the second end of the outer web is the second end of the filter (e.g., The outer wrapping extends beyond the second end of the core that engages the periphery so as to form a (cylindrical) cavity.
The single longitudinally extending core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material and a wrapping paper having additives (eg, particulate additives) engaged around the rod-shaped core. The wrapping paper having the additive has the additive attached to one or more portions on the radially inner surface, and there is no additive over the circumference at the second end of the core. A radially inner surface of the outer web that extends beyond the second end of the core with which the outer web is engaged is a cavity or recess, such as a recess (eg, with the second end of the longitudinally extending core). Form a cylindrical cavity / recess at the second end of the filter.

  In a further embodiment, the outer wrapping paper may have an additive (eg, a particulate additive), the additive being free from a circular additive at the second end of the wrapping paper. At the same time, it is attached to one or more portions of the radially inner surface. The outer wrapping paper may be free of additives in a region extending from the second end of the wrapping paper (toward the first end). The region is preferably at least greater than the distance by the second end of the wrapping paper that extends beyond the second end of the core that engages the wrapping paper so as to form the cavity. Thus, the inner surface of the wrapping paper extending beyond the second end of the core that engages the wrapping paper is free of additives over its circumference so as to form the cavity at the second end of the filter. For this reason, there is no additive on the inner wall surface of the cavity.

  Applicants have found that, according to aspects of the present invention, a “monocarbon” filter may be effectively and advantageously included in the recess filter. For example, it can be manufactured in one step (for example, disclosed in British Patent 2,261,152, disclosed in “Active Patch” filter, or in WO 2006/059134). Also, including a “smooth core filter”, for example, a filter that includes a single longitudinally extending core of filter material and an additive (eg, carbon) that has no additive at least at one end. The claimed filter (recess filter) may provide improved sensory properties. This is because the smoke in the filter (eg, by controlling the position of the carbon around the plug wrap of the “patch” or “smooth core” in the center of the smooth score filter, or the plug wrapper of the “active patch” filter) The contact of the stream with carbon can be more controlled. This is because it allows the smoke stream to circulate and mix in the recess before entering the smoker's mouth and acting on the palate. The use of a single longitudinally extending core of filtration material having an additive-free end as a “base rod” in a recess filter makes the manufacturing cost and complexity of an additive, for example, a recess filter including a carbon recess filter, Can be significantly reduced. This is because it is only necessary to cut and adjust to a single filter component rather than two or more sections as in conventional carbon recess filters.

  The use of a wrapping paper that is engaged around the rod core of an extra-fine recess filter, with additives, and a rod core of tobacco smoke filtration material, allows the conventional ultra-thin while maintaining a satisfactory filter pressure drop and smoking experience. Allows the use of higher carbon weight than is used for type carbon recess filters.

  The filtering material may be some of these materials that are conventionally used in tobacco smoke filter manufacture (usually filamentous, fibrous, web-like, or extruded), for example. The filtering material may be a plastic, such as natural or synthetic filamentous tow, for example cotton or polyethylene or polypropylene or cellulose acetate filamentous tow. For example, it can be natural or synthetic staple fibers, fluff, web materials such as paper (usually creped) and synthetic nonwovens, and extruded materials (eg starch, synthetic foam).

  The additive may be a fine particle additive. The particulate additive can be any particulate additive suitable for tobacco smoke filter applications. For example, activated carbon, zeolite, ion exchange resin (for example, weak group anion exchange resin), sepiolite, silica gel, alumina, molecular sieve, carbon polymer resin, and diatomaceous earth. The particulate additive may be a mixture of two or more materials. The additive may include a fragrance. For example, menthol. For example, the additive may be sepiolite granules with menthol applied. If the longitudinal core of the tobacco smoke filter includes a pocket that is fully encapsulated (eg, embedded), the additive may be a particulate additive such as activated carbon (see above). For example, the filtration material is completely encapsulated, for example as a separate pocket or pod of particles of substantially separated particulate additive, encapsulated within the filtration material. In other embodiments, the pocket fully encapsulated (embedded) with the additive may be one or more fragile one or more fragile microcapsules. Capsules and microcapsules may contain, for example, fragrances and / or liquids, solids, or other materials, such as a variety of media to aid in smoke filtration. The use of capsules or microcapsules is well known in the industry.

  The tobacco smoke filter may be 15-40 mm long, for example, 17-35 mm, for example 20-30 mm. A second portion of the outer web that extends beyond the second end of the core with which the outer web is engaged so as to form a cavity in the recessed portion of the filter tip (ie, the second end (eg, mouth) of the filter). The length by the end) may be 3-10 mm long. And optimally it is 4-6 mm long. The single longitudinally extending core of the tobacco smoke filter may be 10-30 mm long, for example 14-27 mm, for example 17-25 mm. The tobacco smoke filter may have a circumference of 14-28 mm, for example, 16-26 mm, such as 16-17 mm, or 24-25 mm. The final tobacco can be breathable or non-breathable and any circumferential range traditionally used in smoking products (eg, 14-28 mm circumference).

The outer wrapping paper may be paper, for example, plug wrapping paper, for example, hard plug wrapping paper. The outer wrapping paper may be porous or non-porous. Outer paper wrapper, the basic weight may be a paper 40 to 120 g / m ^2. Outer paper wrapper, for instance, the recesses filter standard circumference (24~25mm), better basis weight a 80 to 120 / m ^2, for example, about 100 g / m ^2, which is a paper. The fine or ultra-fine recess filter (e.g., up to about 16-17 mm circumference), the outer wrapping may be a lower basis weight plug wrap, for example, about 50 g / m < ² >.

An outer wrapper with a basis weight of about 40-120 g / m ² can overcome possible drawbacks associated with “active patch” filters. It may feel the presence of carbon particles attached to the inner surface of the wrapping paper with additives when having a used filter or tobacco. The formed filter (eg, including an outer wrapper with a basis weight of about 40-120 g / m ² ) provides a larger particle size for the particulate additive to be used (eg, an “active patch” filter component). to enable. Because on the outside of the used cigarette (because the basis weight is heavier and the “hardness” of the wrapping paper increased), the presence of such particles is not felt or is less likely to be felt. This is because.

In a filter cigarette according to the present invention, the filter of the present invention (or a filter comprising the filter element of the present invention) is coupled to a tobacco rod packaged with one end of the filter on the tobacco side. The filter may be coupled, for example, to a tobacco rod packaged with a tip ring (engaging only around the adjacent end of the filter and the rod (packaged) to leave much of the exposed portion of the filter wrapper). . Or more preferably, the filter may be coupled to the packaged tobacco rod by full tip overlap (engaging around the entire length of the filter and adjacent ends of the tobacco rod).
The cigarette may include a tip overlap (eg, hard tip paper) that mates with the outer wrapping paper of the filter to give the finished recess filter tobacco the desired (eg, increased) hardness.

  Any filter or filter cigarette according to the invention can be produced in a known manner, for example pre-perforated holes or air-permeable packaging (plug wrapping) and / or laser drilling of wrapping paper (plug wrapping) and By using an overlap, it may be rendered non-breathable or breathable. The complete overlap of the breathable tips may be essentially air permeable or similar to the disposed breathable holes. The overlap of the filter plug wrapping paper and the leading end will normally be aligned through the plug wrapping paper where air permeability exists through the overlap. Breathable holes that pass through the filter plug wrap, or through the tip overlap, or both at the same time, may be formed by laser drilling during the manufacture of the filter or filter cigarette.

  The breathability of the filter or filter cigarette according to the invention is locally concentrated in the longitudinal direction of the product, and this localized concentration is preferably, and depending on the required breathability and filter performance, the first additive pocket (or , A patch, or a portion) to be one or two regions selected from upstream and downstream. Aligned breathability with upstream and / or first additive pockets is often preferred. When more than one additive is present, there may be breathability between portions (or pockets or patches) of the second additive.

  According to a further aspect of the present invention, there is provided a composite rod comprising a plurality of filters (or filter elements) (eg, 2, 4, 6 etc.) as described above and / or joined together in a mirror image relationship between ends. Is provided.

  The invention will now be described with reference to the accompanying drawings, which schematically illustrate a recess filter, according to the following examples and embodiments of the invention.

FIG. 1 is a diagram according to one embodiment of the present invention; FIG. 2 schematically illustrates a recess filter according to a second embodiment of the present invention; FIG. 3 schematically illustrates a recess filter according to a further embodiment of the invention; FIG. 4 schematically illustrates a recess filter according to yet another embodiment of the present invention; FIG. 5 is a diagram schematically illustrating a recess filter according to still another embodiment of the present invention.

FIG. 1 shows an “active patch” recess filter 1 comprising an outer wrapping 3 of plug wrapping with a basis weight of 100 g / m ² engaged around a single longitudinally extending core of tobacco filtering material 5. The first end 3a of the outer web is substantially coplanar with the first end 5a of the core 5 around which the outer web engages. The second end 3b of the outer web extends beyond the second end 5b of the core 5 around which the outer web engages so as to form a cavity 6, ie a recess in the second end (mouth) of the filter. Extend. A cylindrical cavity (recess) 6 is arranged in which the radially inner surface of the outer wrapping paper 3 extending beyond the second end 5b of the core is disposed at the second end of the filter together with the second end of the core 5b extending in the longitudinal direction. It will be understood that it forms. The single longitudinally extending core of the tobacco smoke filter material 5 is an “active patch” filter element, which is well known and is disclosed, for example, in GB 2,261,152. The core 5 comprises a rod-shaped core 7 of tobacco smoke filtration material in the form of cellulose acetate tow and a wrapping paper 9 having an additive (fine particle additive) engaged around the rod-shaped core. The wrapping paper 9 having the additive has the additive in the form of activated carbon particles adhering to the inner surface of the radial direction or the patch 11, and there is no additive over the circumference of the wrapping paper at the second end 9a of the core. The filter 1 is 27 mm long, and at the second end of the core, the cavity 6, ie the recess, is 6 mm long. The patch 11 is arranged in the center between both ends of the core 7, and the core 7 has both ends without additives. The active patch filter element may be formed, for example, by the method disclosed in British Patent 2,261,152. Methods of wrapping filter elements into recess filters are well known, and how to include a “active patch” filter within a recess filter by those skilled in the art to provide a recess filter according to the present invention. It will be easy to understand.

FIG. 2 shows a similar filter, the reference numerals being the same as in the embodiment of FIG. In the embodiment of FIG. 2, the carbon patch 11 extends to the first (cigarette) end 5a of the core. Therefore, the smoker can hold a larger weight of carbon in the filter while showing a clean end (that is, the core end 5b). FIG. 3 also shows a similar filter, and the reference numerals are the same as those of the embodiment of FIGS. FIG. 3 shows a variation of the “split patch” having two patches 11a and 11b separated by a gap 12 (carbon grains are not on the plug wrapping paper).
The hole 12 is arranged to coincide with the position of a vent (not shown) on the finished tobacco.

4 and 5 show embodiments of “smooth wick” recess filters. FIG. 4 shows a tobacco smoke filter 101 comprising an outer web 103 of plug wrap with a basis weight of 100 g / m ² engaged around a single longitudinal core of tobacco smoke filtration material 105. The single longitudinally extending core of the tobacco smoke filter material 105 is, for example, a pod filter disclosed in WO 2006/059134. The wick 105 is completely encapsulated (eg, embedded) in an additive pocket 199 in the form of activated carbon and includes a rod wick 107 of tobacco smoke filtration material in the form of cellulose acetate tow. The first end 103a of the outer web 103 is substantially flush with the first end 105a of the core around which the outer web engages, and the second end 103b of the outer web is the cavity 106, i.e. the filter. The outer web extends beyond the second end 105b of the core that engages the periphery so as to form a recess at the second end (mouth side). A radially inner surface of the outer wrapping paper 103 extending beyond the second end of the core 105b forms a cylindrical cavity (recess) 106 together with the second end of the longitudinally extending core 105b on the second end or mouth side of the filter. It will be understood that it forms. Alternatively, the filter 101 has a length of 27 mm, and the second end cavity 106, i.e. the recess, has a length of 6 mm. Pocket 199 is located near the first or tobacco end of wick 107. However, it will be appreciated that the wick 107 has ends without additive (since the additive is completely embedded within the wick).
The additive is not visible from the second or mouth end of the filter. The pod filter element 107 is manufactured by, for example, a method disclosed in International Publication No. 2006/059134. Methods for including a filter element within a recess filter are well known, and those skilled in the art will readily understand how to include a pod filter element in a recess filter to provide a recess filter according to the present invention. You will understand.

  FIG. 5 shows a filter similar to FIG. 4, with reference numerals similar to those of the embodiment of FIG. In FIG. 5, the pocket 199 is disposed in the center between the second (mouth side) end and the first (cigarette side) end of the core 107. Also, the wick 107 has both ends without additive (because the additive is completely embedded inside the wick), and for this reason, the additive is visible from the second end or mouth end of the filter. Absent. 4 and 5 show that the location and size / weight of the grain pocket 199 can be varied to suit different tobacco design requirements.

Claims (15)

A cigarette smoke filter or filter element comprising an outer wrapping engaged around a single longitudinally extending core of tobacco smoke filtering material, wherein the first end of the outer wrapping is around the outer wrapping The outer web is engaged with the outer web so that the second end of the outer web is substantially flush with the first end of the core to be engaged and the second end of the outer web forms a cavity at the second end of the filter. Extending beyond the second end of the wick,
The filter or filter element further includes an additive remote from the second end of the outer web and / or the second end of the core. The single longitudinal core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material;
The filter or filter element of claim 1, wherein the rod-shaped core has at least one additive pocket completely enclosed therein. A single longitudinally extending core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material and a wrapping paper engaged around the rod-shaped core and having an additive;
The wrapping paper having the additive has the additive attached to one or more portions of the radially inner surface of the wrapping paper, and the additive over the circumference of the wrapping paper at the second end of the core. The filter or filter element of claim 1, wherein the filter or filter element is absent.   The outer wrapping paper is the outer wrapping paper that is free of the additive around a circle at the second end of the wrapping paper, and has an additive attached to one or more portions of the radially inner surface. Filter or filter element. An outer wrapping paper engaged around a single longitudinally extending core of tobacco smoke filtration material;
A single longitudinally extending core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material with the additive fully enclosed in at least one pocket, the first end of the outer wrapping paper comprising: The outer web is circumferential so that the outer web is substantially flush with the first end of the core with which the outer web is engaged, and the second end forms a cavity at the second end of the filter. A cigarette smoke filter extending beyond the second end of the wick that engages. An outer wrapping paper engaged around a single longitudinally extending core of tobacco smoke filtration material;
The first end of the outer web is substantially flush with the first end of the core around which the outer web engages, and the second end of the outer web is the second end of the filter. The outer web extends beyond the second end of the core that engages the periphery so as to form a cavity;
A single longitudinally extending core of tobacco smoke filtration material comprises a rod-shaped core of tobacco smoke filtration material and a wrapper having an additive engaged around the rod-shaped core, the wrapper having the additive comprising: A tobacco smoke filter having an additive attached to one or more portions of the radially inner surface and having no additive over a circumference at the second end of the core.   The filtration material may be one or more natural or synthetic filament tows, such as cotton, polyethylene or polypropylene, plastics such as cellulose acetate filamentous tows, natural or synthetic staple fibers, fluff, (such as crepe paper) paper, etc. The filter or filter element according to any one of claims 1 to 6, which is a web material, a synthetic nonwoven material, and an extruded material (e.g., starch, synthetic foam).   The filter or filter element according to claim 1, wherein the additive is a fine particle additive.   The fine particle additive is activated carbon, zeolite, ion exchange resin (for example, weak group anion exchange resin), sepiolite, silica gel, alumina, molecular sieve, carbonaceous polymer resin, diatomaceous earth, or one or more of these additives The filter or filter element of any one of Claims 1-8 which is a mixture of these.   6. A filter or filter element according to claim 2 or 5, wherein the additive in a pocket in which the additive is fully enclosed is one or more fragile capsules or one or more microcapsules.   The filter or filter element according to claim 1, wherein the outer wrapping paper is paper such as plug wrapping paper, for example.   The filter or filter element according to claim 1, wherein the outer wrapping paper is a paper having a basis weight of about 40 to 12 g / m 2.   A tobacco smoke filter substantially as described with reference to the accompanying drawings.   14. A filter cigarette comprising a filter according to any one of claims 1 to 13, coupled to a tobacco rod packaged with a first end of the core of the cigarette.   14. A composite rod comprising a plurality (e.g. 2, 4, 6) of filters (or filter elements) according to any one of claims 1-13, wherein the ends are joined together in a mirror image relationship.

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