RU1836040C - Smoking filter - Google Patents

Abstract

A concentric smoking filter (12) in which one of the filter media (20 or 21) is a fibrous tow, such as fibrous cellulose acetate tow, and one of the filter media (21 or 20) is a web material, such as paper, is provided. The filter improves the taste, particularly, of "ultra-light" cigarettes. <IMAGE>

Description

j The invention relates to smoking filters and, in particular, to concentric smoking filters. More specifically, the present invention relates to end tertiary smoking filters having a fibrous and made of /; here means concentrically located.

The purpose of the invention is to provide a high-performance filter that provides low transmission with acceptable taste, RTD and other aesthetics.

According to the present invention, there is provided a smoking filter comprising a first filter plug having; O a central rod of a first filter material and a peripheral slot and a filter material surrounding a central rod. One of the first and second filter materials is cellulose acetate, and the other of the first and second filter materials is an assembled pleated web-shaped material. When a filter is attached to a smoking article and when the smoking article is smoked at a certain level of the total amount of particulate matter, the taste of the smoking article is a taste associated with a total amount of particulate matter greater than quantity at a certain level.

Brief Description of Drawings

The foregoing and other objects and advantages of the invention will become apparent upon consideration of the following detailed description; in connection with the accompanying drawings, in which like reference signs refer to like details throughout and in which:

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In FIG. 1 is a perspective view of the inlet end of a cigarette having a first embodiment of a filter according to the present invention; in FIG. 2 is a radial cross-sectional view of the filter shown in FIG. 1; in FIG. 3 is a perspective view of the inlet end of a cigarette having a second embodiment of a filter according to the present invention; in FIG. 4 is a radial cross-sectional view of the filter of FIG. 3; not fig. 5 is a perspective view of the inlet end of a cigarette having a third embodiment of a filter according to the present invention; in FIG. 6 is a perspective view of the inlet end of a cigarette having a fourth embodiment of the filter of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In accordance with the present invention, it was unexpectedly found that when a concentric filter is made of paper or other web-like material in the core and cellulose acetate fiber at the periphery, Or vice versa, not only is a high filtering efficiency without introducing a smack from the paper, but a lower TPM transmission cigarette can be obtained which tastes of a higher TPM transmission cigarette.

As shown in FIG. 1 and 2, the cigarette 10 includes a tobacco rod 11 and a first preferred embodiment of the filter 12 of the present invention. The tobacco rod 11 is wrapped in a conventional wrapper 13, whereas; the filter 12 is wrapped with conventional mouthpieces 14. The filter 12 includes a peripheral layer of cellulose acetate fiber 20 and a central paper rod 21. The cellulose acetate peripheral layer 20 is a conventional cellulose acetate fiber, preferably wrapped in a porous cover wrap 22, although the technology is self-supporting such a filter rod as a steam connection or a spray coating of the outer surface of the peripheral layer 20, can be used to make a filter that does not need to be wrapped, e If required. Paper core. 21 is a paper web that is corrugated and assembled into a cylindrical shape and wrapped in a cover paper wrapper 23.

Closing wrapper 23 improves the design of the rod 21, as well as the aesthetics of its appearance, and also helps

provide essentially flawless concentricity. Flavors or other additives, such as soluble tobacco components, may be added to

cover wrap 23 to enhance the subjective perception of filtered smoke. A similar result can be obtained by making the cover wrap 23 from a tobacco-containing material, such as a processed tobacco sheet. The cover wrap 23 is preferably porous to allow smoke and air to pass freely in a radial direction between

the peripheral layer 23 and the rod 21. At the same time, the presence of a cover wrap 23 helps to prevent the passage of smoke along the interface between the peripheral layer 20 and the rod

21.

The most preferred embodiment of filter 12 has a perimeter of about 24.45 mm and an average weight of about 258 mg. The cross-sectional area of the rod 21 is preferably 60% of the total cross-sectional area of the filter 12. The filter 12 preferably has an RTD between about 130 mm water column and about 160 mm water column with an RTD value of the central rod 21 between about 350 mm Hg and. approximately 450 mm water column. More preferably, filter 12 has an RTD of about 146 mm aqueous.

column with RTD central rod about 400 mm water column.

In a particularly preferred embodiment, the cellulose acetate fiber of the peripheral layer 20 is

preferably 8.0 / 30000 cellulose fiber having denier per hair 8, total denier of 30,000 and with a Y-shaped cross section. The blade web 21 is a

preferably half-pleated paper made from 100% cellulose; obtained from pulp based on soft wood, with 10% corrugation crosswise to increase tensile strength. Such paper can be obtained from Tela Papierfabrik AG. of Palcthal, Switzerland.

The cigarette 10 is preferably provided with ventilation in the range of about 65% to about 75%, and more preferably with ventilation of about 67% using the special ventilation holes 15 provided in the mouthpiece 14. If the surface of the filter 12 is airtight, matching holes must also be provided in the filter 12. | In FIG. 3 and 4, a cigarette 30 is shown having a second preferred embodiment of the filter 31, similar in design 5 to the variant of the filter 12, except that (the rod 40 is a fibrous material and the peripheral layer 41 is a web-like material. Similarly, in this embodiment, a cover wrap 42 is necessary to place the web-like material of the peripheral layer 41, while a cover wrap or other permeable wrap 43 around the fiber core 40 is not necessary since the fiber The rod can be fully fabricated using the technology of a self-supporting filter rod, as shown above.

The most preferred embodiment of filter 31 has a perimeter of about 24.45 mm and an average weight of about 240 mg. The cross-sectional area of the rod 40 preferably reaches 60% of the total cross-sectional area of the filter 31. The filter 31 preferably has an RTD value between between about 165 mm water column and. approximately 195 mm Hg with an RTD value of the central shaft 40, which is between approximately 285 mm Hg and approximately 385 mm Hg. Most preferably, filter 31 has an RTD of about 182 mm Hg with an RTD value of the central rod 40 of about 334 mm Hg.

In this embodiment, the cellulose acetate rod 40 is preferably a 1.6 / 35000 cellulose acetate fiber having 1.6 denier per hair, a total denier of 35,000 with a Y-shaped cross-section. The web of the peripheral layer 41 is preferably the same half-pleated paper made from 100% cellulose obtained from pulp based on soft wood, with 10% corrugation cross to cross to increase the tensile strength that was used to obtain the filter rod 21 12.

The cigarette 30 is preferably provided with ventilation in the range of about 65% to about 75%, and more preferably with ventilation of about 67% using the special ventilation holes 15 provided in the mouthpiece 14, as well as in the cigarette 10.

in FIG. 5 shows a cigarette 50 having a third preferred embodiment of a filter 51. of the invention. The filter 51 is a so-called double filter made of two adjacent to each other parts of the filter 52, 53. The part of the filter 52, which is adjacent to the tobacco rod 11, is a concentric filter, which is described above, in which one of the elements, a rod 54 or a peripheral layer 55 is made of a web-like material, and another element, a rod 54 or a peripheral layer 54, is made of a fibrous material. The filter portion 53, which is the 5th end portion, is a conventional fiber filter, such as an acetyl cellulose filter, and is installed primarily for cosmetic purposes. Despite this, part 53 has

0 filtering and RTD characteristics, and part 52 should be selected so that the entire filterb has the necessary characteristics .; In a preferred form of this embodiment, part 52 is made like a filter 12, does not have a length of only 18-20 mm, while part 53 is a cork with a length of 7-9 mm from cellulose acetate. 2.6 / 42000 dl. Denier fiber

0 hair 2.6, total value 42000 with a U-shaped cross-section. The RTD value of the entire filter is between about 125 mm water column and about 175 mm water column, preferably about 141 mm water column. The RTD value of part 53 is between about 15 mm water column and about 45 mm water column, preferably about 36 mm

0 water column. The RTD value of part 52 is between about 85 mm water column and about 175 mm water column, preferably about 93 mm water column. The RTD value of the paper rod 54 of part 52 is between about 250 mm water column and about 450 mm water column, preferably about 267 mm water column. Cigarette 50 with filter option 51

0 is provided by ventilation in the range of between about 65% and about 75%, preferably by ventilation of about 71% by means of special ventilation holes 15 in the mouthpiece 14.

5 Fig. 6 shows a cigarette 60 having a fourth embodiment of a filter 61 according to the invention. The filter 61 is a flush-mounted filter, supplemented by a part of the filter 62, hidden flush in the mouthpiece 14 at part 63. The part of the filter 62 that is adjacent to the tobacco rod 11 is a concentric filter, which is described above, in which one of the elements, the rod 64 or the peripheral layer 65 is made of a web-like material, and the other element, the rod 64 or the peripheral layer 65 is made of a fibrous material.

The filter parameters discussed here are for 85 mm cigarettes. It will be appreciated that the filters of the present invention can also be used for longer cigarettes. If longer cigarettes are made, the filter parameters must be selected in accordance with conditions known to those skilled in the art.

Example 1. A filter according to the most preferred embodiment discussed in connection with FIG. 1 and 2, except that the fiber in the peripheral layer was from cellulose acetate 8.0 / 25000 with denier per hair 8.0 and total denier 25000, was made and connected to an ultra-light tobacco rod with the following characteristics: Tobacco 487 mg

Total RTD. 107 mm of water

RTD filter. 146 mm of water

Ventilation67%

Mouthpiece Length 32.0 mm

The cigarette was smoked in a smoking machine under FTC conditions with the following results:

TPM1.8mg

Nicotine0.16mg

Moisture0.21 mg

Resin 1.5mg

 Number of puffs 6.2

A cigarette that generates 1.5 mg of tar was also smoked by an expert smoker who said that the cigarette tasted like a cigarette that generates 4-5 mg of tar. When ventilating, 67% of the filters have an efficiency of about 76%. If there was no ventilation, the efficiency could be about 61%.

The cigarette also showed a visible filtrate deposition at the end of the filter, much more like a fiber filter rather than a cloth filter, although most of the filtrate was deposited on the cloth rod. This is likely the result of the fact that smoke is driven into the rod 21 when venting air is introduced into the holes 15, and then attempts to propagate back into the peripheral fiber layer 20 through the permeable wrap 23. Example 2. Filter suitable

the preferred form of the embodiment of FIG. 5, was manufactured and connected to an ultra-light tobacco rod with the following characteristics: Tobacco429mg

Total RTD93 mm of water

Filter RTD141 mm of water 5th column

Ventilation71%

Mouthpiece Length 32 mm

The cigarette was smoked in a smoking machine under FTC conditions with the following 0 result:

TRM 1.6mg

Nicotine 0.13 mg

Moisture0.10mg

Resin 1.4mg

5 Number of puffs 5.3

As in the case described in Example 1, this cigarette b was smoked by an expert smoker who said that the cigarette tasted like a cigarette that generates 4-5 mg of tar.

The filter of the present invention can improve the taste of low transmission cigarettes. It is also possible that the filter of the present invention provides similar performance at higher gears. For example, the medium transfer of a cigarette may feel like a complete cigarette.

Thus, it can be seen that a high-performance filter is provided which is characterized by low transmission with acceptable taste and other aesthetic influences. One skilled in the art will understand that the present invention can be practiced in different ways from those described for the purpose of illustration and not limitation, and the present invention is limited to only 0 claims, which are presented below.

Claims (18)

SUMMARY OF THE INVENTION 1. A smoking filter comprising a filter rod consisting of two 5 elements, a central rod and a peripheral layer surrounding it, made of various filter materials, one of fibrous material and the other of textured sheet material, and means for tolerance ventilating air into the peripheral layer, characterized in that the sheet material element includes a corrugated fibrous structure, and the peripheral layer has lower pull resistance than the central element. I 2. The filter according to claim 1, with the inclusion of And, and that the fibrous material is cellulose acetate fibers, 3. The filter according to paragraphs. 1 and 2, differing in that. that the peripheral layer is located concentrically with respect to the central H (iiro rod. 4. The filter according to paragraphs. 1-3, on the other hand, with the fact that the central core is made of corrugated fabric, and the peripheral layer is made of fibrous material. 5. The filter according to claim 4, characterized m, that the fibrous material was cellulose acetate fiber with a ham fiber of 8.0 denier and a total denier of 25,000-30000 .. 6. The filter according to claims 1 to 3, characterized in that the central core is made of fibrous Material, and the peripheral layer is made of corrugated fabric. 7. The filter according to claim 6, characterized in that the fibrous material is a cellulose acetate fiber with a fiber volume of 1.6 denier and a total denier of 35,000. 8. The filter according to paragraphs. 1-7, distinguished by the fact that the corrugated sheet is made of paper. 0 5 0 5 0 5 9. The filter according to paragraphs. 1-5. characterized in that the central shaft is wrapped. 10. The filter according to claim 9, characterized in that the wrap is made porous. 11.Filter according to claims 9 and 10. characterized in that the wrapper contains flavoring components, 12.Filter pop. 11, characterized in that the wrapper comprises a mterial including reconstituted tobacco sheet. 13. The filter according to claim 11, with the inclusion of those that the wrapper includes paper with flavoring additives. 14. The filter according to claim 13, on the basis of that. that flavoring agents contain soluble tobacco components. 15.Filter according to claims 1-14, characterized in that the cross-sectional area of the central element is 60% of the cross-sectional area of the filter. 16. Filter according to 0.8, characterized in that the corrugated fibrous structure consists of crepe paper, 17.Filter according to claims 1-16, on the basis of the fact that, the pulling resistance of the central rod is 285-450 mm water column, and the filter as a whole - 130-195 mm water column. 18. Filter according to Claims 1 to 17, characterized in that the means for admitting ventilating air are made to ensure supply of ventilating air in relation to the total flow passing through the filter, 65-75%. 10 fifteen 21 FIG. g // 62 65 e.6 ° 5 63