TWI652996B - Smoking article - Google Patents

Abstract

A smoking article comprising a smokable rod and a dual filter element comprising a rod side filter section comprising a filter material and a sorbent component, and a mouth side filter section. The mouth side filter segment has a mouth side first end and a second end, a first side region starting from the first end, and a second side region terminating at the second end, and comprising a filter material. A plurality of grooves are provided only at the first side edge region, which will extend from the first end and travel generally longitudinally. A plurality of vent holes are provided at the second side edge region. The grooves are not vented by vents provided at the first side region.

Description

Smoking items

The present invention relates to a smoking article comprising a smokable rod and a dual filter member that provides an improved appearance and an improved filtration effect from the end of the filter member.

US 4 256 122 A discloses a cigarette comprising a single filter element having a longitudinal groove in its side region which is extended by the mouth side filter end and is visible at this end. The mouthpiece will connect the filter member to the tobacco rod and cover the grooves, and vent holes or the like are provided in the regions of the grooves, so that the grooves are ventilated.

A similar design is known from the US 4 708 150A patent. In this case, the added venting holes of the filter element are provided upstream of the grooves.

DE 34 03 281 A discloses a cigarette comprising a double filter. The mouth side filter section comprises a cellulose acetate filter element surrounded by a non-porous wrap having longitudinally extending grooves. The rod side filter section comprises cellulose acetate and activated carbon as an adsorbent. The two filter segments are interconnected by a common connecting wrap. A non-porous mouthpiece paper will form the outermost layer and attach the dual filter to the tobacco rod. Formed by the grooves The grooves are vented through a plurality of vents.

In all of these cases, the grooves formed at the side regions of the mouth-side filter region act as channels through which the ambient air is conducted, so that the air that dilutes the tobacco smoke is directly Enter the mouth of the smoker. This may lead to a less pleasant impression.

Moreover, a single filter element is known to comprise a plurality of grooves arranged in the side regions of the filter element. The grooves may extend longitudinally from the mouth side end of the filter member but do not extend to the other end of the filter member. The grooves are embossed in an inner roll. An additional outer column roll can be standard or porous. These filter elements are marketed by Essentra Filter Products under the trade name "Combined Performance Superior ^TM Filter". Another product marketed by the company Essentra under the trade name "Combined Performance Superior ^TM Dual Filter" is a dual filter element comprising the aforementioned single filter element plus a rod side filter section containing cellulose acetate And activated carbon as an adsorbent. In both cases, vents were not provided.

The EP 2 265 137 B patent discloses a composite material formed from cellulose acetate and precipitated cerium oxide, which can be used, for example, for filtration of liquids or gases, or for use in cigarette filters.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a smoking article which combines a special appearance at the mouth side end with a high degree of filtration and gas phase reduction without exhibiting the aforementioned unpleasant air dilution effect.

This purpose is a smoking that has the characteristics of claim 1 The item is reached. Advantages of the invention are known from the dependent claims.

A smoking article in accordance with the present invention comprises a smokable rod (e.g., a tobacco rod is wrapped in cigarette paper) and a dual filter. The filter element comprises a rod side filter section comprising a filter material and an adsorbent, and a mouth side filter section. The mouth side filter section extends from a mouth side first end to a second end, wherein a first side edge region begins at the first end and extends to approximately the middle circumferential line, and a second side edge region It will extend from the line to the second end of the mouth side filter segment. The mouth side filter section comprises a filter material such as cellulose acetate. A plurality of grooves (channels) are provided in the first side region, that is, only in the first side region. The grooves will extend from the first end of the mouth-side filter segment and will travel generally longitudinally, i.e., generally parallel to the longitudinal axis of the smoking article. A plurality of vent holes are provided in the second side region, and the grooves are not vented via any vent holes provided in the first side region. Preferably, the dual filter element does not include a vent hole other than the second side region of the mouth side filter element segment.

Since the grooves start at the first end of the mouth-side filter segment, i.e., the mouth-side end of the smoking article, they are visible at this end and provide a special appearance to the smoking article. These grooves are not part of an air venting system because they are not vented through the vents. Therefore, the degree of aeration of the smoking article according to the present invention is not affected by the compression of the mouth-side filter segment (e.g., by the smoker's lips) during use, which may block the formation of the grooves. aisle.

The absence of a vent in the rod side filter section has another advantageous effect. In this case, the ventilating air is drawn through the adsorbent The filter section will introduce an increased flow of air which may reduce the efficiency of the adsorbent in the downstream region of the venting zone, which will not occur.

In a preferred embodiment of the invention, the mouth side filter section includes an inner wrap that defines the grooves in the first side region and flat in the second side region of. The inner wraps may be grooved in the first side edge region, and ridges and valleys may be formed by grooves, wherein the concave valleys are in the filter material of the mouth side filter segment. The recesses are defined in the recesses. Further, the mouth side filter section may comprise another wrapper (hereinafter referred to as a post wrap) which overlies the inner wrap and is wrapped in a generally cylindrical shape. In this way, the grooves and the column pack form a channel. In the second side region, the column pack will abut the inner wrap substantially over the entire second side region. The column wrap can be glued to the inner wrap, wherein preferably the channels are substantially free of glue.

The inner wrap may be porous. In this case, the air-diluted main plume that enters the mouth-side filter section via the vents is drawn through the filter material of the mouth-side filter section, but may also pass through the porous inner wrap. The objects enter the channels and are filtered by the material (eg paper) of the inner wrap before they flow downstream, so they are substantially unobstructed and do not dilute, passing through the grooves or channels The smoker is in the mouth.

The rod side filter section and the mouth side filter section can be interconnected by a connecting wrap. In principle, the aforementioned package can be used as the connection wrap, but preferably another wrap is used, which is wound when the two filter segments are placed end to end. The column pack of the mouth side filter section and the side of the rod side filter section are wound. In this case, the rod side filter section The filter material and the adsorbent may also be wrapped in a separate column package which will form the side of the rod side filter section and be covered by the attachment wrap.

Finally, as an outermost wrap, a mouthpiece can be used to attach the dual filter to the smokable rod. Usually, the mouthpiece is made of paper, but other materials can also be conceived.

In a preferred embodiment of the invention, the connecting wrap and/or the mouthpiece is non-porous, ie the material used for the connecting wrap and/or the mouthpiece is essentially non-porous or only one very Low porosity. In this case, ambient air can only actually enter the dual filter element via the vents when in use. If the joint wrap and/or the mouthpiece is non-porous, the choice of porosity (e.g., high or very low) of any of the column packs will not have a particular effect.

The filter member aeration rate can be, for example, at least 20% or at least 40%. Preferably, the vents are laser perforated. After a dual filter element has been attached to an individual smokable rod on a combination machine and after applying a mouthpiece, the laser punctured vent can be used to manufacture the smoking item on a cigarette manufacturer's production line. Prepared during the period. In general, the laser beam will extend through the mouthpiece and the attachment wrap, as well as the column wrap and the inner wrap of the mouth side filter section.

In a preferred embodiment of the invention, the adsorbent in the rod side filter section is a composite material comprising cerium oxide, for example, made into a porous matrix comprising a cellulose acetate/ceria substrate. Particles. Such materials and methods for their manufacture are known from the patent EP 2 265 137 B. Cerium oxide has good adsorption properties, and cellulose acetate of these particles will change The adhesion of the particles in the filter material (e.g., cellulose acetate) of the rod side filter section is good.

1‧‧‧Smoking items

2‧‧‧Smoking rod

4‧‧‧Dual filter

6‧‧‧ rod side filter section

8‧‧‧ mouth side filter section

10‧‧‧Filter materials

12‧‧‧ first end

13‧‧‧ second end

14‧‧‧Intermediate circumference

16‧‧‧First side area

17‧‧‧Second side area

20‧‧‧ Groove

22‧‧‧Inclusions

24‧‧‧ Valley

26‧‧‧ ridge

28‧‧‧Wraps

30‧‧ ‧ cigarette holder

32‧‧‧Ventinel

Hereinafter, the present invention will be further illustrated by an embodiment. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a three-dimensional illustration of one embodiment of a smoking article in accordance with the present invention, wherein the dual filter member is shown with its wrap partially unwrapped.

Figure 1 shows an embodiment of a smoking article (labeled 1) in a three-dimensional partial schematic view.

The smoking article 1 comprises a smokable rod 2 wrapped in cigarette paper and a double filter element 4 attached thereto. Other smoking materials other than tobacco can be imagined. The dual filter element 4 comprises a rod side filter section 6 and a mouth side filter section 8.

The rod side filter section 6 comprises a filter material and an adsorbent and is wrapped in a further column pack, which is not shown in detail in FIG. In this embodiment, cellulose acetate is used as the filter material. The adsorbent is cerium oxide contained in porous particles, which also contains cellulose acetate. Such particles are known, for example, from the EP 2 265 137 B1 patent.

The mouth side filter section 8 comprises a filter material 10 (e.g., cellulose acetate) and extends from a first end 12 of the mouth side end of the dual filter element 4 to a second end 13. Figure 1 shows an intermediate circumferential line 14, which is a dashed line, which is drawn to divide the side region of the mouth-side filter segment 8 into a first side region 16 (from the first end 12 to the middle) Circumference line 14) and A second side region 17 (extending from the intermediate circumferential line 14 to the second end 13).

At the first side edge region 16, a plurality of grooves 20 are provided which extend from the first end 12 and are generally longitudinally aligned, i.e. parallel to the longitudinal axis of the smoking article. However, the grooves 20 in the filter material 10 do not span the intermediate circumferential line 14, so they are confined within the first side region 16. An inner wrap 22 is wrapped around the mouth side filter section 8. In the first side region 16, the inner wrap 22 is grooved, and the valleys 24 and the ridges 26 and the like are formed by grooves, wherein the valleys 24 correspond to the grooves 20, The ridges 26 are held at the level of the original surface of the filter material 10 as a layer of the substantially cylindrical second side region 17. In this embodiment, the inner wrap 22 is made of a porous paper.

The mouth side filter section 8 contains another wrap 28 (column pack). It overlies the inner wrap 22 and the wrap is generally cylindrical. In the present embodiment, the wrap 28 is made of a porous paper, and the region of the ridges 26 and the second side region 17 are glued to the inner wrap 22. The glue generally does not enter the valleys 24. In this manner, the valleys 24 and the like of the inner wrap 22 are combined with the overlapping portions of the wraps 28 in the grooves 20 to form a plurality of channels (grooves) extending from the mouth side filter member. The first side edge region 16 of the segment 8 is located.

In the present embodiment, the rod side filter section 6 contains its own column packing (not shown separately in Figure 1). The mouth side filter section 8 and the rod side filter section 6 are interconnected by a joint wrap (not shown in Fig. 1) which facilitates the combination of the dual filter element 4. The latter column package and the connection package The material can be made of porous paper or non-porous paper.

The double filter member 4 is attached to the smokable rod 2 by a mouthpiece 30 which is glued to the outer surface of the filter element side end region of the double filter member 4 and the smokable rod 2. In the present embodiment, the mouthpiece 30 is made of a non-porous material or a material having a low or very low porosity, such as a paper material.

A plurality of vents 32 are provided at the second side region 17 of the mouth side filter section 8, and only in this region, so that the channels or grooves defined by the grooves 20 are not vented. In Figure 1, the vents 32 are arranged on a circumferential line. Other patterns of vents can also be imagined. The vents 32 can be prepared by a line of laser puncturing techniques and extend through the entire stack of wraps, i.e., through the mouthpiece 30, through a wrapper not shown in FIG. Pass through the wrap 28, and through the inner wrap 22 and the like. In this way, the venting air will enter the filter material 10 directly.

When the smoking material 1 is used, the main smoke stream diluted by the venting air may not only flow through the filter material 10 into the user mouth, but also through the porous material wrapping material through the filter material 10. 22, and via the channels defined by the grooves 20.

Claims (13)

A smoking article comprising a smokable rod and a double filter element, the double filter element comprising: a rod side filter element section comprising a filter material and an adsorbent; and a mouth side filter element section having a mouth side One end and a second end, a first side region starting from the first end and a second side region terminating at the second end, and comprising a filter material, wherein the plurality of grooves are only provided At the first side edge region, and extending from the first end and extending substantially longitudinally; wherein a plurality of vent holes are provided at the second side edge region, and the grooves are not provided The vent holes at the first side region are vented; and wherein the double filter member does not include other vent holes except for the vent holes provided in the second side region of the mouth side filter member segment. The smoking article of claim 1 wherein the mouth side filter segment comprises an inner wrap that defines the grooves in the first side region and is flat in the second side region. The smoking article of claim 2, wherein the inner wrap is grooved in the first side region to form a ridge and a valley groove, wherein the concave valley is on the mouth side The grooves are defined in the recess of the filter material of the filter section. The smoking article of claim 2, wherein the mouth side filter segment comprises another wrap that overlies the inner wrap and is wrapped into a generally cylindrical shape. The smoking article of claim 2, wherein the inner wrap is porous. The smoking article of claim 1, wherein the rod side filter section and the mouth side filter section are interconnected by a connecting wrap. A smoking article according to claim 1, wherein a cigarette holder connects the double filter member to the smokable rod. A smoking article according to claim 6 or 7, wherein the connecting wrap and/or the mouthpiece is non-porous. The smoking article of claim 1, wherein the filter has an aeration rate of at least 20%. The smoking article of claim 1, wherein the filter member has a ventilation rate of at least 40%. The smoking article of claim 1, wherein the vent holes are laser perforated. The smoking article of claim 1, wherein the adsorbent in the rod side filter section is a composite material containing cerium oxide. The smoking article of claim 12, wherein the adsorbent comprises porous particles of a cellulose acetate/ceria substrate.