KR20130007612A - Tobacco smoke filter - Google Patents

Abstract

A tobacco smoke filter or filter element comprising an outer wrapper of a tobacco smoke filter material surrounding a longitudinally extending single core, the first end of the outer wrapper being defined by a first end of the core that the outer wrapper surrounds; Substantially coplanar, the second end of the outer wrapper extends beyond the second end of the core that the outer wrapper surrounds to define a cavity at the second end of the filter; The filter or filter element further comprises an additive spaced apart from the outer wrapper and / or the second end of the core.

Description

Tobacco smoke filter {TOBACCO SMOKE FILTER}

The present invention relates to filters and filter elements for smoking articles such as cigarettes.

Recess filters are well known in the tobacco industry and provide a unique end appearance to the pistol. Recess filters are typically made by wrapping filter segments in a continuous stream at a predetermined interval on a relatively stiff plug wrap paper. By cutting the filter stream at the site where no filter segments (elements) are present, a recess filter can be obtained, in which a stiff plug wrap paper can be produced and used with the final crimp without shredding the exposed paper end of the filter. Provide sufficient training to ensure that

The recess filter may contain one, two or more filter segments. In order to incorporate activated carbon or other particulate additives into the filter, two or more segments had to be used, which typically included cellulose acetate to provide smokers with a white end of white (inside the recess or cavity). The segment closest to the tobacco column, which comprises the segment closest to the mouth end and typically carbon (or other) granules interspersed in the fibrous matrix. The use of two or more segments to incorporate particulate additives into the recess filter entails an increase in the complexity and cost of the process of making the carbon recess filter. In addition, there is a limit to the weight of carbon that can be incorporated into the carbon-containing segment of such a two-segment filter and beyond that limit increases the filter pressure drop, resulting in unsatisfactory smoking characteristics, for example, Segment superslim (e.g. 16 mm in circumference) also affects the activated carbon containing recess filter.

It is an object of the present invention to provide a tobacco smoke filter and filter element that do not increase the complexity or manufacturing cost of the manufacturing process and do not degrade smoking properties.

According to the invention there is provided a tobacco smoke filter (or filter element) comprising an outer wrapper surrounding a single longitudinally extending core of tobacco smoke filter material, the first end of the outer wrapper being surrounded by the outer wrapper. It is substantially coplanar with the first end of the core, and the second end of the outer wrapper extends past the second end of the core that the outer wrapper surrounds and at the second end of the filter (eg tubular Of the cavity; The filter (or filter element) is provided with a tobacco smoke filter further comprising an additive (eg, particulate additive) spaced from the outer wrapper and / or the second end of the core. The radially inner surface of the outer wrapper extending past the second end of the enclosing core is at the second end of the recess filter, for example by the second end of the longitudinally extending core. Or a recess, for example a tubular cavity / recess, may be defined.

The particulate additive is spaced apart from the second end of the wrapper and / or core so that it is not visible from the second end of the wrapper and / or core.

In one embodiment, the longitudinally extending single core of the tobacco smoke filter material is one (or one) of an additive (eg, particulate additive) that is completely sealed (eg embedded) therein. And a rod-shaped core of tobacco smoke filter material having a pocket of the above). The rod-shaped core of tobacco smoke filter material may optionally have an additional wrapper (eg porous or non-porous) surrounding the rod-shaped core. Providing a fully sealed pocket of additive in the core of tobacco smoke filter material has the effect that the additive is spaced from the second end of the core (since there is a tobacco smoke filter material between the pocket of the additive and the end of the core). ).

The longitudinally extending single core of the tobacco smoke filter material is proximate to the first end (e.g., the cigarette end in the filter case), which is completely sealed (eg embedded) therein. It may have a single pocket of additive (eg, particulate additive) at a location remote from two ends (eg, a ball or mouth end). The longitudinally extending single core of the tobacco smoke filter material comprises the core and the first end of the core (eg, the cigarette end in the filter case), which is completely sealed (eg embedded) therein. May have a single pocket of additive (eg, particulate additive) located at equal intervals between the second ends of the filter (eg, the end of the core closest to the ball or mouth end in the filter filtration). The longitudinally extending single core of the tobacco smoke filter material is one or more (eg two, three or four) separate additives (eg particulate additives) completely enclosed therein. It can have a pocket of. Pockets of fully sealed (eg embedded) additives can taper in one or both end directions-for example generally in the form of an ellipsoid. If there are more than one pocket of additives, these pockets may be evenly spaced in the longitudinal direction. Other arrangements of pockets are possible-for example, longer and relatively shorter gaps are alternately arranged in the longitudinal direction-this can be achieved by appropriate adjustment of the manufacturing process. Of tobacco smoke filter material comprising a rod-shaped core of tobacco smoke filter material in which a pocket of one (or more) additive (eg particulate additive) is completely sealed (eg embedded) therein, Single cores extending in the longitudinal direction can be produced, for example, by the method and apparatus disclosed in patent document WO 2006/059134.

According to the present invention there is provided a tobacco smoke filter comprising a cigarette smoke filter material comprising an outer wrapper surrounding a single core extending in a longitudinal direction; The longitudinally extending single core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material having pockets of one (or more) of additives (eg, particulate additives) therein; The first end of the outer wrapper is substantially coplanar with the first end of the core that it surrounds, and the second end of the outer wrapper extends past the second end of the core that surrounds the second end of the filter. A cigarette smoke filter is provided, defining a cavity (recess) at the end. The rod-shaped core of tobacco smoke filter material may optionally have an additional wrapper surrounding the rod-shaped core. The radially inner surface of the outer wrapper extending beyond the second end of the enclosing core may be, at the second end of the filter (eg, by a second end of the core extending in the longitudinal direction), eg a cavity or recess. For example, a tubular cavity / recess can be defined.

In another embodiment, a longitudinally extending single core of tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material and an additive (eg, particulate additive) support wrapper surrounding the rod-shaped core. Wherein the additive support wrapper has an additive (eg, particulate additive) attached to at least one portion of its radially inner surface with no additive present around the perimeter at the second end of the core. The absence of an additive at the second end of the additive support wrapper has the effect that the additive is spaced from the second end of the core (because there is no additive on the wrapper at the second end of the core). Preferably, the additive support wrapper does not include additives around its perimeter at both the first and second ends of the core. A core extending in the longitudinal direction of a tobacco smoke filter material, including a rod-shaped core of a tobacco smoke filter material and an additive (for example, particulate additive) support wrapper surrounding the rod-shaped core, is disclosed in Patent Document GB 2261152. It may be a filter element as disclosed in. The additive support wrapper may be porous or nonporous.

Therefore, according to the present invention there is provided a cigarette smoke filter comprising a cigarette smoke filter material comprising an outer wrapper surrounding a single core extending in a longitudinal direction; The first end of the outer wrapper is substantially coplanar with the first end of the core that it surrounds, and the second end of the outer wrapper extends past the second end of the core that surrounds the second end of the filter. Defining a (eg tubular) cavity at the end; The longitudinally extending single core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material and an additive (eg, particulate additive) support wrapper wrapped around the rod-shaped core, wherein the additive support wrapper Is provided with a tobacco smoke filter having an additive attached to at least one portion of its radially inner surface with no additives around the perimeter at the second end of the core. The radially inner surface of the outer wrapper extending beyond the second end of the surrounding core is at the second end of the filter (eg, by the second end of the longitudinally extending core) or cavity It is possible to define a set, for example a tubular cavity / recess.

In another embodiment, the outer wrapper is an additive (eg, particulate additive) attached to one or more portions of its radially inner surface with no additives around the perimeter at the second end of the wrapper. It can have The outer wrapper may not include an additive (in the direction of the first end) in a region extending from the second end of the wrapper, wherein the region passes a second end of the wrapper past a second end of the surrounding core. It extends up to a distance as long as it extends, and preferably further away from it to define the cavity. Thus, the inner surface of the wrapper extending beyond the second end of the core, which is enclosed to define the cavity at the second end of the filter, does not contain additives around it, and therefore no additive is visible on the inner surface of the wall of the cavity.

Applicants contain, for example, 'monocarbon' filters—ie, single cores extending in the longitudinal direction and additives (eg, carbon) having one or more ends that do not include additives and Filters, which can be produced, for example, in a one-pass process ('active patch' filters such as those disclosed in patent document GB 2261152 and those disclosed in patent document WO 2006/059134). It has been found that the same 'smooth core' filter-can be effectively and advantageously incorporated into a recess filter according to one aspect of the invention. The filter (recess filter) claimed by the present invention can provide improved sensory properties, which allows better control of the contact of the smoke stream by the carbon in the filter (e.g., a 'smooth core' filter). By controlling the position of carbon on the rim of the plug wrap in the central 'pod' or pocket in the center, or on the 'active patch' filter, followed by a stream of smoke entering the smoker's mouth and impinging on the palate. This is because the smoke stream is circulated and mixed in the recess before the process. As a "base rod" in the recess filter, the use of a single core extending in the longitudinal direction of the filter material with no additive end means that the recess filter contains an additive, for example a carbon recess filter. The complexity and cost of manufacturing can be significantly reduced. This is because it is only necessary to cut and align a single filter component rather than two or more segments as in the case of a conventional carbon recess filter.

The use of a rod-shaped core of tobacco smoke filter material and an additive (eg, particulate additive) support wrapper surrounding the rod-shaped core in a superslim recess filter is typically a super-super, while maintaining a satisfactory pressure drop and a feeling of smoking. It will be possible to use higher carbon weights than in the case of slim carbon recessed filters.

The filter material can be, for example, any material commonly used for the manufacture of tobacco smoke filters (generally filamentous, fibrous, web or extrudates). The filter material can be natural or synthetic filamental tow, or cellulose acetate filamental tow, of cotton or plastic such as polyethylene or polypropylene. It can be, for example, natural or synthetic staple fibers, cotton wool, web materials such as paper (generally corrugated) and synthetic nonwovens, and extrudates (eg, starches, synthetic foams).

The additive may be a particulate additive. The particulate additive may be any particulate additive suitable for use in tobacco smoke filters, such as activated carbon, zeolites, ion exchange resins (e.g. weakly basic anion exchange resins), sepiolites, silica gels, Alumina, molecular sieve, carbonaceous polymer resin and diatomaceous earth. The particulate additive may be a mixture of two or more materials. The additive may comprise a flavour, such as methanol, for example the additive may be a sepiolite granule to which methanol is applied. If the longitudinally extending core of the tobacco smoke filter comprises pocket (s) in which the additive is completely sealed (eg embedded) therein, the additive is a particulate additive such as activated carbon (see above) It may be, for example, substantially separated from the filter material and sealed in the filter material as individual pockets or pods of particulate additive that are completely sealed in the filter material. In yet another embodiment, the fully sealed (eg embedded) additive pocket (s) may be brittle capsule (s) or one or a plurality of brittle microcapsules. The capsule (s) or microcapsule (s) may contain various media such as, for example, flavors and / or other substances to assist in the filtration of liquids, solids, or smoke. The use of capsules or microcapsules is well known in the art.

The tobacco smoke filter may have a length of 15-40 mm, for example 17-35 mm, for example 20-30 mm. The recess section of the filter tip (ie, the length of the second end of the outer wrapper extending beyond the second end of the enclosing core to define the cavity at the second end of the filter (eg mouth)) is 3 to 3 It may have a length of 10mm, most preferably has a length of 4 ~ 6mm. The single core extending in the longitudinal direction of the tobacco smoke filter may have a length of 10-30 mm, for example 14-27 mm, for example 17-25 mm. The tobacco smoke filter may have a circumference of 14 to 28 mm, for example 16 to 26 mm, for example 16 to 17 mm or 24 to 25 mm. The final filter filtration can be ventilated or non-ventilated and can have any circumferential range traditionally used in smoking products (eg, about 14 mm to about 28 mm).

The outer wrapper may be paper such as plug wrap paper, for example stiff plug wrap paper. The outer wrapper may be porous or nonporous. The outer wrapper may be paper having a basis weight of about 40 to about 120 g / m 2. The outer wrapper may have a basis weight of about 80 to about 120 g / m 2, for example about 100 g / m 2, for example in the case of a recess filter having a standard circumference (about 24 to 25 mm). In the case of a slim or super slim recess filter (e.g., a filter reduced to about 16-17 mm in circumference), the outer wrapper may be a plug wrap paper having a lower basis weight, for example about 50 g / m 2. .

Outer wrappers having a basis weight of about 40 to about 120 g / m 2 are potential drawbacks associated with 'active patch' filters, ie they adhere to the inner surface of additive support wrappers (e.g. plug wrap paper) when handling finished filters or cigars. It can overcome the disadvantage of being able to feel the presence of the carbon granules. Such limited filters (e.g., filters comprising an outer wrapper having a basis weight of about 40 to about 120 g / m2) may enable the use of larger granular sized particulate additives (e.g. 'active patches In the filter component, it is because the presence of such particles is less or less likely to be felt outside of the finished scouring (due to the increased 'stiffness' of the wrapper with a heavier basis weight).

In the filter reel according to the present invention, the filter of the present invention (or the filter comprising the filter element of the present invention) is coupled to a wrapped tobacco rod with one end of the filter facing towards the tobacco. The filter can be, for example, ring tipping (a way of enclosing only the adjacent ends and rods of the (wraped) filter so that a large portion of the filter wrap remains exposed), or more preferably full tipping It can be coupled to the wrapped tobacco rod by a full tipping overwrap (in a manner that surrounds the full length of the filter and the adjacent end of the tobacco rod). The scouring can include a tipping overlap (eg of stiff tipping paper) with the outer wrapper of the filter to impart the desired (eg, increased) stiffness to the final recess filter scouring.

The filter or filter filtration according to the invention can either be non-ventilated, or by methods well known in the art, for example the use of pre-perforated or air-permeable wrappers (plug wraps), And / or by laser drilling of the wrapper (plug wrap) and tipping overlap. Vented full tipping overlap is likewise air-permeable, or may be vented, and in vented products where both filter plug wraps and tipping overlaps exist, ventilation through the overlap is usually matched with ventilation through the plug wrap. Will be. The vents through the filter plug wrap or the tipping overlap, or through the both simultaneously, can be made by laser drilling in the manufacture of the filter or filter reels.

In the case where the aeration in the filter or filter refining according to the invention is limited in the longitudinal direction of the product, this limited arrangement is preferably upstream, downstream, and first of the first additive, depending on the required aeration and filtration performance. It is limited to one or two sites selected to match the pocket (or patch or site) of the primary or first additive. Aeration is often preferred that is upstream of the first additive and / or with the pocket of the first additive. When two or more sites are present, there may be a vent between the sites (or pockets or patches) of the second additive.

In a further aspect according to the invention, multiple rods comprising a plurality of filters (or filter elements), as described above and / or herein integrated end-to-end in a mirror image relationship, are integrated. Is provided.

According to the present invention, there is provided a tobacco smoke filter and a filter element that do not increase smoking characteristics and increase the complexity or manufacturing cost of the manufacturing process.

1 is a schematic diagram of a recess filter according to an embodiment of the present invention.
2 is a schematic diagram of a recess filter according to a second embodiment of the present invention.
3 is a schematic diagram of a recess filter according to another embodiment of the present invention.
4 is a schematic diagram of a recess filter according to another embodiment of the present invention.
5 is a schematic diagram of a recess filter according to another embodiment of the present invention.

Example

1 shows an 'active patch' lid comprising an outer wrapper 3 of plug wrap paper having a basis weight of 100 g / m 2, enclosing a single core 5 of tobacco smoke filter material extending longitudinally. The set filter 1 is shown. The first end 3a of the outer wrapper is substantially coplanar with the first end 5a of the core 5 that it surrounds, and the second end 3b of the outer wrapper 5 surrounds the core 5 that it surrounds. And extends beyond the second end 5b of the cavity to define a cavity 6 that is a recess at the second (mouth) end of the filter. Defining a tubular cavity (recess) 6 located at the second end of the filter, along with the second end 5b of the core extending in the longitudinal direction, extends beyond the second end 5b of the core. It will be appreciated that it is a radially inner surface of the outer wrapper 3. The single core 5 extending in the longitudinal direction of the tobacco smoke filter material is an 'active patch' filter element that is well known in the art, for example as disclosed in patent document GB 2261152. The core 5 comprises a rod-shaped core 7 of tobacco smoke filter material in the form of cellulose acetate tow, and an additive (particulate additive) support wrapper 9 surrounding the rod-shaped core, the additive The support wrapper 9 has an additive in the form of activated carbon granules attached to a portion of its radially inner surface or to the patch 11, which additive support wrapper has an additive around the second end 9a of the core. Does not include The filter 1 has a length of 27 mm, of which the cavity 6 at the second end, ie the recess, has a length of 6 mm. The patch 11 is located centrally between the two ends of the core 7; The core has both ends that do not contain additives. The active patch filter element can be manufactured by the method disclosed, for example in patent document GB 2261152. Methods of embedding filter elements in recess filters are well known in the art and those skilled in the art will readily understand how to incorporate 'active patch' filter elements within a recess filter to provide a recess filter in accordance with the present invention. will be.

2 shows a similar filter, with reference numerals the same as for the embodiment of FIG. 1. In the embodiment of FIG. 2, the carbon patch 11 extends up to the first (tobacco side) end 5a of the core, allowing larger weights of carbon to be accommodated in the filter, but still a clean end for the smoker ( Ie end 5b of the core). 3 also shows a similar filter, with reference numerals the same as for the embodiment of FIGS. 1 and 2. 3 shows a 'split patch' variant with two patches 11a, 11b separated by a gap 12 (where no carbon granules are present on the plug wrap); The position of the gap 12 is set to coincide with the position of the vent hole (not shown) on the finished crimp.

4 and 5 show an example of a 'smooth core' recess filter. 4 shows a tobacco smoke filter 101 comprising an outer wrapper 103 of plugwrap paper of a reference weight of 100 g / m 2, surrounding a longitudinally extending single core 105 of tobacco smoke filter material. . The single core 105 extending in the longitudinal direction of the tobacco smoke filter material is, for example, a pod filter as disclosed in patent document WO 2006/059134. The core 105 comprises a rod-shaped core 107 of tobacco smoke filter material in the form of cellulose acetate tow, in which a pocket 199 of additives in the form of activated carbon particles is completely sealed. (E.g. built in). The first end 103a of the outer wrapper 103 is substantially coplanar with the first end 105a of the core it is surrounded by, and the second end 103b of the outer wrapper is formed of the core of the core it is surrounded by. It extends beyond the two ends 105b to define a cavity 106, ie a recess, at the second (mouth) end of the filter. A tubular cavity (recess) 106 at the second end of the filter, ie the mouth end, with the second end 105b of the core extending beyond the second end 105b of the core and extending in the longitudinal direction. It will be understood that the confinement is the radially inner surface of the outer wrapper 103. The filter 101 has a length of 27 mm, of which the cavity 106 at the second end, ie the length of the recess, is 6 mm. The pocket 199 is located in the direction of the first end of the core, i.e. the tobacco end, where the core 107 has both ends free of additives (because the additive is fully embedded inside the core). Will be understood; The additive is not visible at the second end of the filter, ie the mouth end. The pod filter element 107 can be manufactured by the method disclosed, for example in patent document WO 2006/059134. Methods of embedding a filter element in a recess filter are well known in the art and those skilled in the art will readily understand how to embed a pod filter element in a recess filter to provide a recess filter in accordance with the present invention.

FIG. 5 shows a filter similar to that of FIG. 4, wherein the reference numerals are the same as for the embodiment of FIG. 5. In FIG. 5, pocket 109 is centrally located between the second (mouth side) end and the first (tobacco side) end of core 107; It will also be understood here that the core 107 has both ends where no additive is present (because the additive is completely embedded inside the core), so the additive is not visible at the second end of the filter, ie the mouth end. . 4 and 5 show that the location and size / weight of the granule pocket 199 can vary to suit various pistol design requirements.

Claims (15)

A tobacco smoke filter or filter element comprising an outer wrapper surrounding a single longitudinally extending core of tobacco smoke filter material,
The first end of the outer wrapper is substantially coplanar with the first end of the core that the outer wrapper surrounds, and the second end of the outer wrapper crosses the second end of the core that the outer wrapper surrounds. Extend to define a cavity at the second end of the filter; The filter or filter element further comprises an additive spaced apart from the outer wrapper and / or the second end of the core,
Tobacco smoke filter or filter element. The method of claim 1,
The longitudinally extending single core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material having a pocket of one or more additives sealed therein. The method of claim 1,
The longitudinally extending single core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material and an additive bearing wrapper surrounding the rod-shaped core, wherein the additive support wrapper comprises: Tobacco smoke filter or filter element at the second end of the core without additives around and having an additive attached to one or more portions of its radially inner surface. The method of claim 1,
And the outer wrapper does not include an additive at its perimeter at the second end of the wrapper and has an additive attached to one or more portions of its radially inner surface. A tobacco smoke filter comprising an outer wrapper of a tobacco smoke filter material surrounding a single core extending in a longitudinal direction;
The longitudinally extending single core of the tobacco smoke filter material comprises a rod-shaped core of tobacco smoke filter material, which completely seals the pocket of one or more additives therein; The first end of the outer wrapper is substantially coplanar with the first end of the core that the outer wrapper surrounds, and the second end of the outer wrapper crosses the second end of the core that the outer wrapper surrounds. Extending to define a cavity at the second end of the filter,
Tobacco smoke filter. A tobacco smoke filter comprising an outer wrapper of a tobacco smoke filter material surrounding a single core extending in a longitudinal direction;
The first end of the outer wrapper is substantially coplanar with the first end of the core that the outer wrapper surrounds, and the second end of the outer wrapper crosses the second end of the core that the outer wrapper surrounds. Extend to define a cavity at the second end of the filter; The longitudinally extending single core of the tobacco smoke filter material includes a rod-shaped core of tobacco smoke filter material and an additive support wrapper surrounding the rod-shaped core, wherein the additive support wrapper includes a second end of the core. In which there is no additive around the periphery and has an additive attached to at least one portion of its radially inner surface,
Tobacco smoke filter. 7. The method according to any one of claims 1 to 6,
The filter material may be one or more natural or synthetic filamental tows, for example cotton or plastics such as polyethylene or polypropylene, cellulose acetate filamental tow, natural or synthetic staple fibers, cotton wool, paper ( Tobacco smoke filter or filter element, which is a web material such as, for example, pleated paper, a synthetic nonwoven material, and an extrudate (eg, starch, synthetic foam). 8. The method according to any one of claims 1 to 7,
Tobacco smoke filter or filter element, wherein the additive is a particulate additive. The method according to any one of claims 1 to 8,
The particulate additive may be activated carbon, zeolite, ion exchange resin (for example, weakly basic anion exchange resin), sepiolite, silica gel, alumina, molecular sieve, carbonaceous polymer resin, diatomaceous earth, or two kinds of such additives. Tobacco smoke filter or filter element which is a mixture of the above. 6. The method according to claim 2 or 5,
Wherein said additive in said fully sealed additive pocket (s) is a brittle capsule (s), or one or a plurality of brittle microcapsules. 11. The method according to any one of claims 1 to 10,
Tobacco smoke filter or filter element, wherein the outer wrapper is paper, for example plug wrap paper. 12. The method according to any one of claims 1 to 11,
Tobacco smoke filter or filter element, wherein the outer wrapper is paper having a basis weight of about 40 g / m 2 to about 120 g / m 2. Tobacco smoke filter substantially as described herein with reference to any one of the accompanying drawings. 14. Filter filter comprising a filter according to any one of claims 1 to 13, coupled to a wrapped tobacco rod with the first end of the core in the tobacco direction positioned towards the tobacco. A plurality of filters (eg, two, four, six, etc.) according to any one of claims 1 to 13, which are end-to-end integrated in a mirror image relationship. Multiple rods (or filter elements).

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