RU2665672C2 - Cigarette - Google Patents

Abstract

FIELD: smoking accessories.SUBSTANCE: invention relates to a thin cigarette which has a tobacco rod comprising a tobacco filler and a cigarette paper wrapped around the periphery of the tobacco filler; a filter having a filter element and a paper filter wrapper completely wrapped around the periphery of the filter element and containing 35 mg or more of a flavour-releasing material; a tipping paper that is bonded onto the tobacco rod and the filter so as to connect the tobacco rod and the filter, the filter element comprising an acetate tow, and in the filter section there are perforations for to allow air to flow when drawing, said perforations passing through the tipping paper and the paper wrapper of the filter, wherein the diameter of the cigarette, the denier of the separate fibre of the acetate tow and the total denier of the acetate tow, and the size and number of perforations are selected from the condition of providing a flow resistance of the cigarette, which is 150 mm of a water column or less, while providing a resin content in the main smoke stream of 8 mg or more, for which the diameter of the cigarette is taken to be equal to 3.0 to 6.0 mm, the denier of a single fibre of the acetate tow being taken to be from 10 g/9,000 m to 13 g/9,000 m, total denier of the acetate tow is taken to be from 11,000 g/9,000 m to 13,000 g/9,000 m, and the size and number of perforations are such that the ratio (Vf) of the volume (Qf) of the air flowing inwardly through the perforation to the total volume (Q) of the sucked air ranges from 10 to 60 %.EFFECT: ensuring the supply of aerosol to the user.3 cl, 2 dwg

Description

Technical field

The invention relates to a thin cigarette.

State of the art

Thin cigarettes are on the market, such as the Superslim cigarette, whose diameter is 5.4 mm. An even thinner Microslim cigarette is also known. Due to the small thickness, a specific problem is associated with these thin cigarettes. Namely, since the cigarette is thin, it usually has increased puff resistance. Puff resistance of a cigarette correlates with the ease of smoking for smokers, and it is difficult to smoke a cigarette with excessively high puff resistance. Generally speaking, a cigarette puff resistance of 80 to 150 mm water column is required.

General methods for developing a cigarette with the desired low drag resistance of a cigarette include:

(1) reduction in filter tightening resistance;

(2) reduction in tobacco rod puff resistance; and

(3) increasing the volume of incoming air (Qf) from the perforations in the rim paper, and decreasing the volume of incoming air (Qt) from the top of the cigarette. Filter tightening resistance can be reduced by changing the manufacturing conditions of the filter manufacturing machine to reduce the degree of acetate filling in the filter rod. However, when the filter stick is uniformly filled with acetate fiber, there is a limit to reducing the degree of filling with acetate fiber. In particular, in a thin cigarette with a diameter of 6.0 mm or less, it is difficult to suppress an increase in drag resistance, since the cigarette is thin, this is only possible by reducing the degree of filling with acetate fiber. Similarly, there is a limit to reducing puff resistance by decreasing the degree of filling with tobacco aggregate in the tobacco rod. For these reasons, in order to reduce the drag resistance of the cigarette, increase the amount of incoming air (Qf) from the perforations in the rim paper and decrease the amount of incoming air (Qt) from the top of the cigarette. However, in this case, the volume of air supplied for burning chopped tobacco is reduced, which leads to a decrease in the content of resins created during combustion.

Thus, in a thin cigarette, which usually has an increased puff resistance, it is difficult to achieve simultaneously the desired low puff resistance of the cigarette and a high tar content. Indeed, in commercially available 5.4 mm diameter cigarettes, the volume of incoming air (Qf) from the perforations in the casing paper is increased to achieve the desired low drag resistance of the cigarette. Such cigarettes typically have a low tar content of from about 1 to 8 mg compared to regular sized cigarettes with a tar content of from about 1 to 20 mg. For example, Patent Document 1 proposes a thin cigarette (diameter: 5 to 7 mm) with a resin content of 1 mg or less, containing a two-segment filter. Indeed, the inventors of the present invention analyzed some commercially available thin cigarettes, but could not find a cigarette with a cigarette drag resistance of 150 mm water column or less and a tar content of 8 mg or more in the mainstream smoke.

In addition, it is known that when an aroma-releasing material is added to the filter, the aroma-releasing material dispersed in the filter material acts as a factor in the rapid increase in the drag resistance of the filter depending on the amount added. Therefore, such a filter containing an aroma-releasing material has an increased drag resistance of the filter compared to a filter consisting of only filter material. Thus, when the aroma-releasing material is added to the thin cigarette filter, the drag resistance of the filter increases dramatically.

In addition, it is known that when a multi-segment filter is used in a cigarette, the multi-segment filter has an increased drag resistance of the filter compared to a conventional filter, since the multi-segment filter contains several segments. That is, a multi-segment filter contains more paper surrounding the filter material than a conventional filter, and therefore, the filter material must have a smaller diameter. Thus, when a multi-segment filter is used in a thin cigarette, the drag resistance of the filter increases dramatically.

As mentioned above, a filter containing an aroma-releasing material and a multi-segment filter typically have an increased drag resistance of the filter. Therefore, in a thin cigarette containing such a filter, it is also difficult to achieve the desired low drag resistance of the cigarette and a high tar content.

Background Documents

Patent Documentation

Patent Document 1: National Publication of Japan PCT No. 2001-520874.

Patent Document 2: International Publication No. WO 2011/042175.

Patent document 3: Publication of patent application GB No. 2091078.

Patent Document 4: International Publication No. WO 93/08707.

Patent Document 5: Patent Publication U.S. No. 5058608.

Patent Document 6: National Publication of Japan PCT No. 2006-503572.

Patent Document 7: Patent Publication U.S. No. 4273141.

SUMMARY OF THE INVENTION

Technical problem

In light of the situation described above, it is an object of the present invention to provide a thin cigarette comprising a filter containing a flavor-releasing material, the thin cigarette having a low puff resistance and a high resin content. In particular, it is an object of the present invention to provide a thin cigarette comprising a multi-segment filter containing an aroma-releasing material, the thin cigarette having a low puff resistance and a high resin content.

Solution

The inventors have found that even when a flavor-releasing material is added to a thin cigarette filter, both the desired low drag resistance of the cigarette and a high resin content can be achieved by using acetate fiber with a fiber thickness of more than 8.0 g / 9000 m as a filter material and a total thread thickness of less than 15000 g / 9000 m, which leads to the implementation of the present invention.

In particular, the present invention provides a cigarette comprising:

a tobacco rod comprising tobacco filler and cigarette paper wrapped around the periphery of the tobacco filler; a filter comprising a filter element and a paper filter wrapper completely wrapped around the periphery of the filter element; and a wrapping paper adhered to the tobacco rod and the filter for attaching the tobacco rod and the filter to each other, perforations to provide air flow during tightening, formed so that the wrapping paper and the filter paper wrapped in the filter portion are punctured,

moreover, the cigarette has a diameter of from 3.0 to 6.0 mm,

the filter element contains an acetate fiber with a fiber thickness of more than 8.0 g / 9000 m and a total filament thickness of less than 15000 g / 9000 m, and

the filter contains 35 mg or more of aroma-releasing material.

In particular, the present invention provides the above-mentioned cigarette, wherein the filter is a multi-segment filter containing several filter segments, and at least one of the filter segments contains acetate fiber with a fiber thickness of more than 8.0 g / 9000 m and a total thread thickness less than 15000 g / 9000 m.

The technical result of the invention

The present invention provides a thin cigarette comprising a filter containing a flavor-releasing material, the thin cigarette having the desired low drag resistance and high resin content. In particular, the present invention provides a thin cigarette comprising a multi-segment filter containing an aroma-releasing material, the thin cigarette having the desired low drag resistance and high resin content.

Brief Description of the Drawings

FIG. 1 is an exploded perspective view of an exemplary cigarette of the invention.

FIG. 2 is an explanatory view illustrating the flow of air into a cigarette according to the invention.

Description of Embodiments

The present invention will be explained below with reference to the drawings. The following explanation is provided for a detailed description of the present invention and is not meant to limit the present invention.

In FIG. 1 shows one example of a thin cigarette. In FIG. 1, the end of the tobacco rod 10 is cut off so that the inside of the tobacco rod 10 can be seen.

The cigarette of the invention has a diameter of from 3.0 to 6.0 mm and is thin. The cigarette of the invention has a diameter of, for example, 4.5 or 5.4 mm. The cigarette of the invention has a structure similar to that of a conventional filter cigarette, except that its diameter is small. That is, a cigarette according to the invention comprises a tobacco rod 10 and a filter 20, and a tobacco rod 10 and a filter 20 are connected to each other by a wrapping paper 30. The total length of a cigarette according to the invention can be, for example, from 80 to 100 mm.

The tobacco rod 10 is formed of tobacco filler 11 and cigarette paper 12 wrapped around the periphery of the tobacco filler 11, as in a conventional cigarette. The tobacco rod 10 has a diameter of from 3.0 to 6.0 mm and may have a length of, for example, from 50 to 75 mm. Cigarette paper 12 may have a thickness of 10 to 100 μm, and air permeable paper is typically used as cigarette paper 12.

The filter 20 is located at the end of the tobacco rod 10 and consists of a filter element 21 and a paper wrapper 22 of the filter wrapped around the periphery of the filter element 21. The filter 20 has a diameter almost equal to the diameter of the tobacco rod 10, and may have a length of, for example, from 25 to 30 mm The filter element 21 shown in FIG. 1, has a single filter design, a so-called simple filter design. The paper wrapper 22 of the filter, which is completely wrapped around the periphery of the filter element 21, has a thickness of 10 to 100 μm and optionally can be permeable to air. The paper wrapper 22 of the filter contains perforations 23 in the same places as the perforations 31 of the wrapping paper 30 so that the perforations 23 coincide with the perforations 31.

The filter element 21 consists of an acetate fiber with a fiber thickness of more than 8.0 g / 9000 m and a total filament thickness of less than 15000 g / 9000 m. The acetate fiber of the filter element 21 mainly has a fiber thickness of more than 8.0 g / 9000 m and not more than 15 g / 9000 m and preferably has a fiber thickness of 10 to 13 g / 9000 m. The filter element 21 generally has a total thread thickness of at least 10,000 g / 9000 m and less than 15,000 g / 9000 m, and preferably a total thread thickness of 11,000 up to 13000 g / 9000 m. The cross section of each acetate strand that forms the acetate fiber can be of any shape, for example, a fork braznoy shape or a circular shape, and circular shape is preferable to reduce the tightening of the filter resistance.

The filter 20 contains an aroma-releasing material 24. The aroma-releasing material 24 contains an aroma component and a component for suppressing the volatility of the aroma component. For example, the aroma-releasing material 24 may be in the form of a capsule containing a flavoring component. Such a capsule-shaped aroma-releasing material has a diameter of several tens of microns, and a large number of aroma-releasing materials are distributed in the filter element 21 (see FIG. 1) (see, for example, patent publication WO 2009/157240). Alternatively, the aroma-releasing capsule-shaped material has a diameter of several millimeters, and one of several aroma-releasing materials may be incorporated into the filter element 21 (see, for example, patent publication WO 2011/024068) or may be contained in a cavity formed between two filter segments spaced apart from each other (see, for example, patent publication WO 2006/117697). Alternatively, the aroma-releasing material 24 may be in the form of a filament (vein) impregnated with a flavoring component and incorporated so that it passes through the center of the filter (see, for example, Japanese Patent Publication No. 63-38187).

The aroma component contained in the aroma-releasing material 24 may be any aroma component used in a cigarette, such as menthol. Aroma-releasing material 24 may be added in an amount of 35 mg or more per cigarette, for example, from 35 to 235 mg per cigarette.

The cigarette of the invention may further comprise an adsorbent, such as activated carbon, in the filter element 21.

The wrapping paper 30 is adhered with adhesive so that it covers the entire paper wrapper 22 of the filter and part of the cigarette paper 12. The portion of the wrapping paper 30 that covers the paper wrapping 22 of the filter is called "filter portion wrapping paper". For example, the wrapping paper 30 may have a length (width) of 30 to 37 mm in the direction of the axis of the tobacco rod and a thickness of 10 to 100 μm. As with a regular filter cigarette, the wrapping paper is provided with perforations 31 to let the air flow inside the cigarette (filter element 21) from the outside when puffed. Perforations for the penetration of air (ventilation holes) are designed to allow air to flow through them into the cigarette when puffed and, as a result, the volume of air flow from the top of the cigarette is reduced to reduce the drag resistance of the cigarette. Perforations for air penetration (ventilation openings) are provided in a line along the circular direction of the cigarette of FIG. 1, but may be provided in several lines along the circular direction of the cigarette, or a large number of perforations may be provided in an erratic manner. Perforations 31 are formed so as to puncture the filter paper of the filter portion and the filter paper wrapper 22.

As shown in FIG. 2, in a conventional cigarette, the total volume (Q) of air drawn in through the mouthpiece of the cigarette consists of the volume (Qt) of air flowing inwardly from the top of the cigarette, the volume (Qp) of air flowing inwardly by passing through the cigarette paper 12, and the volume (Qf) of the air flowing inwardly from the perforations 31 of the wrapping paper 30. The ratio (Vt) of the volume (Qt) of the air flowing through the top of the cigarette is represented as 100 × Qt / Q (%); the ratio (Vp) of the volume (Qp) of the air flowing in due to passage through cigarette paper is represented as 100 × Qp / Q (%); and the ratio (Vf) of the volume (Qf) of the air flowing in through the perforations in the rim paper is represented as 100 × Qf / Q (%). The ratios of the volumes (Vt, Vp and Vf) of air can be obtained by measuring the volumes of air under standard smoking conditions in accordance with the method of the ISO standard using a device for evaluating the quality of cigarettes (ISO 9512).

The target amount of resins in a cigarette of the invention is 8 mg or more. When the aforementioned acetate fiber of the invention is used in the filter, the ratio (Vf) of the volume of air flowing in through the perforations in the rim paper to the total volume (Q) of air can be suitably set in order to achieve the desired amount of resins and can be established, for example equal to from 10 to 60%, preferably from 20 to 50%. In a cigarette according to the invention, the ratio (Vt) of the volume of air flowing into the upper part of the cigarette to the total volume (Q) of air is usually from 28 to 90%, and the ratio (Vp) of the volume of air flowing in due to passage through cigarette paper to the total volume (Q) of air is usually from 0 to 12%.

The Vf value mentioned above can be obtained by adjusting the size and number of perforations in the rim paper by changing the power and pulse length of the laser punch mounted in the cigarette machine.

In the present invention, the filter paper wrapper 22 is provided with perforations 23 at the same locations as the perforations 31 in the rim paper 30 so that the perforations 23 coincide with the perforations 31 as described above. Therefore, perforations can be provided by providing holes using a laser punch to pierce not only the banding paper, but also the filter paper wrapper. Therefore, the air permeability of the filter paper wrapper does not matter.

In order to obtain the Vp value mentioned above, it is preferable that paper with an air permeability of 5 to 100 CU, preferably 60 CU or less, be used as starting material for the cigarette paper 12. Cigarette paper 12 may contain a combustion regulator, such as citrate, in an amount of 1.0% by weight or less based on the weight of the cigarette paper.

Thus, in a cigarette according to the invention, low filter puff resistance, preferably filter puff resistance of 50 to 90 mm water column, can be achieved by using acetate fiber as a filter material with a fiber thickness of more than 8.0 g / 9000 m and a total thread thickness less than 15,000 g / 9000 m, even when aroma-releasing material is added to the filter. Therefore, even when the ratio (Vf) of the volume of air flowing in through the perforations in the rim paper to the total volume (Q) of air does not increase, a low drag resistance of the cigarette can be achieved, and a high tar content can also be obtained. In addition, in the cigarette of the invention, there is no deterioration in the strength of the filter portion of the cigarette compared to existing thin cigarettes containing an acetate filter, although an acetate fiber with the above-mentioned specific fiber thickness and total thread thickness is used. As a result of this, in the cigarette of the invention there is no problem of the sensation of holding the cigarette in the mouth and ease of handling when pressed while smoking. As indicated above, in a cigarette of the invention, low puff resistance of the cigarette (i.e., not more than 150 mm Hg) and a high resin content (i.e., 8 mg or more) can be achieved without compromising the strength of the thin cigarette, even when an aroma-releasing material is added to the filter. In the present invention, “low puff resistance” means a puff resistance of not more than 150 mm water column, typically from 100 to 150 mm water column. In the present invention, “high resin content” means a resin content of 8 mg or more, usually from 8 to 13 mg.

In the present invention, “filter drag resistance” refers to a value measured in accordance with an ISO method (ISO 6565) using, for example, a drag resistance meter A11 “Draw Resistance Meter A11” (manufactured by Burghart Company). “Cigarette puff resistance” refers to a value measured in accordance with an ISO standard (ISO 6565) using, for example, an “NCQA” device (manufactured by JT Toshi Inc.). “Resin content” refers to a value measured in accordance with the smoking conditions of the ISO standard (ISO 3380 and ISO 3402).

In a cigarette of the invention, the filter may be a multi-segment filter containing several filter segments, for example a double or triple filter. In this case, at least one of the filter segments (consisting of filter material and a paper wrapper around the filter material) contains a filter material formed of acetate fiber with a fiber thickness of more than 8.0 g / 9000 m and a total filament thickness of less than 15000 g / 9000 m. Preferably, all filter segments contain filter media formed from acetate fiber with a fiber thickness of more than 8.0 g / 9000 m and a total filament thickness of less than 15000 g / 9000 m.

For example, in a cigarette according to the invention, the filter is a two-segment filter consisting of a first filter segment located on the side of the tobacco filler and a second filter segment located on the mouth side. The first filter segment is an acetate fiber filter containing an adsorbent (for example, activated carbon), and the second filter segment is an acetate fiber filter containing a large amount of aroma-releasing capsule-shaped materials. The filter materials of each of the first and second filter segments are formed of acetate fiber with a fiber thickness of more than 8.0 g / 9000 m and a total filament thickness of less than 15000 g / 9000 m.

Thus, in the case of using a multi-segment filter in a cigarette according to the invention, a cigarette can likewise have a low pulling resistance of a cigarette (i.e., 150 mm water column or less) and a high resin content (i.e., 8 mg or more) when an acetate fiber with a fiber thickness of more than 8.0 g / 9000 m and a total filament thickness of less than 15000 g / 9000 m is used as the filter material of at least one filter segment. When the filter segment contains an aroma-releasing material or adsorbent, it is preferred that at egmente filter as the filter material used acetate fiber with a fiber thickness of 8.0 g / 9000 m and a total thread thickness of less than 15,000 g / 9000 m.

In the case of using a multi-segment filter in a cigarette according to the invention, the filter may contain a different filter segment formed using a different filter material than “acetate fiber with a fiber thickness of more than 8.0 g / 9000 m and a total thread thickness of less than 15000 g / 9000 m” . For example, the filter may comprise a different filter segment formed using a paper filter, a Neo filter made from a non-woven sheet of natural pulp, or a different acetate filter than the acetate fiber mentioned above. Preferably, a filter segment with a low drag resistance is used as another filter segment. In the case of filter paper and a Neo filter, a filter segment with a low drag resistance can be obtained by adjusting the sheet width, base sheet weight, sheet density and the like.

Thus, in the present invention, even when a filter containing an aroma-releasing material is used in a thin cigarette that can cause an increase in the drag resistance of the cigarette, the advantages of the present invention (i.e., low drag resistance of the cigarette and high tar content) can be detected by the use of acetate fiber as a filter material with a fiber thickness of more than 8.0 g / 9000 m and a total filament thickness of less than 15000 g / 9000 m.

List of items

10: tobacco rod

11: tobacco filler

12: cigarette paper

20: filter

21: filter element

22: filter paper wrapper

23: perforation

24: aroma-releasing material

30: rim paper

31: perforation

Claims (8)

1. A thin cigarette having: a tobacco rod comprising tobacco filler and cigarette paper wrapped around the periphery of the tobacco filler; a filter having a filter element and a filter paper wrapper completely wrapped around the periphery of the filter element and containing 35 mg or more of an aroma-releasing material; and wrapping paper adhered to the tobacco rod and filter for connecting the tobacco rod and filter to each other, moreover, the filter element contains an acetate tourniquet, and perforations are formed on the filter section for inlet of the air flow during tightening, passing through the casing paper and the paper wrapper of the filter, the diameter of the cigarette, the denier of the individual fiber of the acetate tow and the total denier of the acetate tow, as well as the size and number of perforations, are selected from the condition of providing drag resistance to the cigarette, which is 150 mm water column or less, while ensuring the resin content in the mainstream smoke, which is 8 mg or more, for which the diameter of the cigarette is taken from 3.0 to 6.0 mm, denier of a single fiber of an acetate tow is taken from 10 g / 9000 m to 13 g / 9000 m, the total denier of an acetate tow is taken equal to m from 11000 g / 9000 m to 13000 g / 9000 m, and the size and number of perforations is taken such that the ratio (Vf) of the volume (Qf) of the air flowing in through the perforations to the total volume (Q) of intake air is from 10 to 60% 2. The cigarette according to claim 1, in which the filter is a multi-segment filter containing several filter segments, and at least one of the filter segments contains an acetate tow having a denier of a single fiber from 10 g / 9000 m to 13 g / 9000 m and total denier from 11000 g / 9000 m to 13000 g / 9000 m. 3. The cigarette according to claim 1, in which the filter is a two-segment filter containing a first filter segment located on the side of the tobacco filler, and a second filter segment located on the mouth side, and at least one of the filter segments contains an acetate tow having denier of a single fiber from 10 g / 9000 m to 13 g / 9000 m and total denier from 11000 g / 9000 m to 13000 g / 9000 m.

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