JPH04262773A - smoking articles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION This invention relates to smoking articles in which the smoking material is comprised of tobacco leaves or other suitable materials.

0002

[Background of the invention] Smoke (aerosol) generated from smoking articles
has a complex composition, containing a wide variety of compounds in its vapor and particulate (whether liquid or solid) phases. The compounds contained in the particulate phase can be classified into non-volatile and semi-volatile components. Here, semi-volatile components are defined as all compounds that can be evaporated from a chemically inert substrate heated to a temperature of 200°C. Many of the compounds that contribute to the taste and aroma of smoke produced by smoking articles are included in the semi-volatile components. It has been experimentally confirmed that approximately 50% of the particulate matter contained in the smoke of smoking articles is semi-volatile components.

0003

OBJECTS OF THE INVENTION One of the objects of the present invention is to increase the concentration of semi-volatile compounds in smoke generated from smoking materials and reduce the concentration of non-volatile compounds, thereby improving the taste even if the amount of particulates produced is small. and maintain the fragrance.

0004

DESCRIPTION OF THE INVENTION A smoking article according to the present invention comprises a rod of smoking material and a filter section connected to the rod, and the filter section filters out particulate matter in smoke generated from the rod of smoking material. Means for collecting in a collection area and means for heating said collection area so that non-volatile substances are retained in the filter and semi-volatile substances are released.

Preferably, said rod of smokable material includes a longitudinally extending passageway through which hot gases are directed from the tip of the smoking article to said collection area when the article is ignited. It will be destroyed. In addition, in a preferred specific example,
The collection area is formed by a radially extending impermeable member onto which particulate matter in the smoke is deposited. Said radially extending impermeable member may be constituted by a disc, the central part of which serves as said collection area, and the peripheral part provided with holes. The location of this disk is preferably within the chamber, into which the smoke from the smokable material flows and the hot gases which are directed from said passageway to the collection area. Optionally, means can also be provided for accelerating hot gas from the passageway to the collection area.

[0006] In another embodiment, the collection region can be comprised of a high retention filter element. In this case, a filter element with a high retention force is provided at a distance from the end of the smokable material rod to form a chamber near the collection area, thereby separating the smoke from the smokable material and the longitudinal passages. Hot gas directed to the collection region can flow into the chamber. It is also possible to provide a second filter element at the mouth end of the smoking article. The passageway within the rod of smokable material may be formed by a low-permeability tubular body with few pores.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be implemented in various ways, and typical examples thereof will be described below using two embodiments with reference to the drawings. As shown in FIGS. 1-4, the smoking article of the invention comprises a rod 1 of smoking material (e.g. tobacco leaves) wrapped in a wrapping paper 2. As shown in FIGS. The rod has a longitudinally extending passage 3, which passage is constituted by a tube 4 of a less porous material. This tube 4 can be made of paper or reconstituted tobacco sheet. The diameter of the tube 4 is usually 0.5 to 5
It is in the range of mm. A filter 5 is provided at the mouth end of the portion wrapped in the wrapping paper 2, and a radially extending impermeable member is provided in the form of an impingement disk 6 made of a thermally stable material. It is attached to the filter 5. Examples of materials that can be used for the disk 6 include metals such as aluminum, ceramics, nylon, plastics such as polyethylene and polypropylene, and cellulose acetate. When the disk 6 is made of nylon 66 or ceramics, it is preferable that the disk has a small heat capacity and a low thermal conductivity. The disk 6 has a central impact surface 7 around which a number of holes 8, typically 1 mm in diameter, are provided.

A chamber 10 is provided between the inner end 9 of the rod of smokable material 1 and the surface of the disc 6, in which a second disc 11 is disposed.
is installed. The material of the second disc 11 can be selected from the materials exemplified for the disc 6, and the materials of both discs may be the same or different. The second disc 11 is provided with one or more holes 12 (three in the drawing), the diameter of which is typically 0.1 to 1 mm, preferably 0.4 mm.
~1 mm. These holes function as acceleration nozzles, as described below.

When the end 13 of the smoking article is ignited and smoked, the smoke enters the chamber 10 and passes through the nozzle 12, increasing its velocity so that the impact surface of the disc 6 The impact of smoke on 7 is encouraged. For this reason, the particulate matter will be deposited in the area 7, so that this area will function as a collection area.

The hot gases flowing from the burning tip into the passage 3 are accelerated through the holes 12 and impinge on the impingement surface 7, so that the collection area, together with the particulate matter deposited thereon, is sufficiently heated and half-filled. Releases volatile compounds. The released semi-volatile compounds flow radially outward with the smoke and are delivered from the filter 5 through the holes 8 to the smoker. Some of the semi-volatile compounds are emitted through the collection area before impacting because the collection area is heated.

[0011] The collision surface 7 is usually 2 m from the hole (nozzle) 12.
m away. Although in the illustrated embodiment the tubular passageway 3 is coaxial with the smokable material rod 1, the tubular passageway can be offset to one side if desired.

A second embodiment is shown in FIG. 5, in which the same parts as in FIGS. 1-4 are numbered the same. In this embodiment, the means for collecting particulate matter in the smoke is
It is composed of a filter element 15 with a high retention force. This filter element 15 is located within the chamber 10 away from the inner end of the rod of smokable material. In other words, this member 15 is similar to the disc 6 and second disc 1 in the first embodiment.
It replaces 1. In the second embodiment, the smoke from the rod 1 impinges on the front face 16 of the filter 15 and the majority of all particulates are trapped in the first 10 mm or so of the filter 15. This situation is indicated by number 17. The trapped particulate matter is heated again by hot gas or smoke flowing through the passage 3, as in the first embodiment. Second
The filter 5 can be located apart from the filter element 15, as shown, or it can be adjacent to it. To reiterate, the action of the hot gas or smoke is to heat the precipitated particulates and release the semi-volatile components, which then pass through the filter-5.

The second filter 5 may contain activated carbon in order to reduce the concentration of vaporous components in the smoke. If desired, ventilation air can also be introduced into the filter 15 through the holes 18 in the paper wrapper 5 to concentrate the flow of aerosol and hot gas or smoke in the central part of the filter. Similarly, in the case of the embodiment shown in FIG.
Ventilation air is introduced through the holes 19 in the paper wrapper 5, and the aerosol flow is aerodynamically concentrated onto the disc 6 and filtered.
Efficiency can be improved. Furthermore, if necessary, ventilation air may be supplied, for example through holes 20, to cool the vaporized semi-volatile components with this ventilation air, thereby recondensing them before they reach the smoker. You can also do that.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view of a smoking article according to the invention.

FIG. 2 is a sectional view taken along the line II-II in FIG. 1;

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a longitudinal sectional side view showing another embodiment of the present invention.

[Explanation of numbers]

1 Smoking material rod 2. Rolling paper 3 Passage 5 Filter 6 Disk 10 Atrioventricular chamber 11 Second disk 12 Hole (nozzle) 15 Filter element

Claims (13)

[Claims] Claim 1: Comprised of a rod of smokable material and a filter part connected thereto, means for collecting particulate matter in smoke generated from the rod of smokable material in a collection area, and a means for collecting particulate matter in smoke generated from the rod of smokable material in a collection area, means for heating said collection area so that semi-volatile substances are released;
Smoking articles provided by the department. 2. The rod of smokable material includes a longitudinally extending passageway through which hot gases generated when the smoking article is ignited travel from the distal end of the smoking article to the collection area. Smoking articles listed. 3. The smoking article of claim 2, wherein said collection region includes an impermeable member extending radially of the smoking article so that particulate matter in the smoke is deposited therein. 4. The smoking article of claim 3, wherein said radially extending impermeable member is a disk whose central portion defines said collection area and has apertures at its periphery. 5. The smoking article of claim 4, wherein said disc is located within a chamber into which smoke from smokable material and hot gas directed from said passageway to a collection area flow. 6. The method according to claim 1, further comprising means for accelerating hot gas from said passageway to a collection area.
Smoking articles listed in section. 7. The smoking article of claim 6 including means for accelerating hot gas and smoke from said passageway to a collection area. 8. The acceleration supply means has a diameter of 0.
7. The smoking article according to claim 6, comprising an air-impermeable disk having one or more holes of 1 to 1.0 mm. 9. The smoking article of claim 2, wherein said collection area comprises a high retention filter element. 10. A chamber in which said filter element of high retention is located remote from the end of the rod of smokable material and into which the smoke from the smokable material and the hot gas directed from said passageway to the collection area flow. 10. The smoking article of claim 9, wherein said smoking article is formed proximate said collection area. 11. A smoking article according to claim 1, wherein the second filter element is provided at the mouth end of the smoking article. 12. A smoking article according to claim 1, wherein the passageway within the rod of smokable material is formed by a tubular body with few pores and low air permeability. 13. A smoking article as shown and described in the drawings.