ES2204833T3 - SMOKER ITEM. - Google Patents

Abstract

Cigarette with filter comprising a strand of wrapped tobacco and a filter (20) with a ventilation means, said filter being composed of at least two filter parts (22, 23), - the ventilation means being arranged in the area of the filter part on the mouth side (22) and - the filter part being on the mouth side (22) a filter part of at least one piece and the filter part being on the side of the tobacco thread (23) a coaxial filter part with a core (24) and a jacket (26); characterized in that the tobacco strand (11) is a strand in one piece and that the pressure drop of the core (24) is less than the pressure drop of the jacket (26).

Description

Article for smoker.

The invention relates to a cigarette with Vented filter according to the preamble of claim 1.

In the state of the art they are used filter constructions for use in smoke filters tobacco, consisting of a plurality of filter parts with different material properties, to solve several problems that have been raised. In addition, filter ventilation is used to ensure smoother smoke and a reduced supply of pollutants

EP 474 940 B2 and EP 608 047 B1 describe smoke filters, in which a core segment central is formed by a filter material different from that of the filter shirt These smoke filters are also called core filters or coaxial filters. In one embodiment of EP 474 940 B2 (Fig. 5), the filter consists of two longitudinal filter zones, that is, a filter part of vented core on the strand side and a monofilter part by the mouth side, the monofilter part having the mouth side the function of an aesthetic effect. The aforementioned smoke filters they suffer from the disadvantage that in any case the envelope of the Inner core of the core filter area consists of a material that is permeable to smoke, whereby smoke can flow vertically at the interface between the core and the filter jacket core

EP 0 558 166 B1 describes a cigarette with ventilated filter, which also has an area of monofilter at the mouth end and a core filter zone by the strand side However, said filter cigarette presents a hollow chamber located between the two filter elements, which It has been filled with an adsorbent (for example activated carbon). This consequently the adsorbent changes the taste of smoke and the composition of smoke components drastically, not accepted by many smokers.

EP 0 880 904 A1 and DE 39 01 226 C1 they achieve the objective of making a cigarette with values of condensed particularly low by means of an arrangement coaxial not only of the tobacco strand, but also of the filter, what which is achieved primarily through the coaxial structure of the tobacco thread However, said construction suffers from drawback that specific production devices, necessary to manufacture the coaxial thread, they are very expensive.

EP 539 191 B1 has raised the aim to provide a ventilated filter cigarette with a particularly light weight. Here the drawback is that the densities of the materials used (both of the tobacco strand as of the filter) should be minimized, in order to prepare precisely said cigarette of particularly light weight, what which extremely limits the variation options with respect to cigarette design. In said cigarette, the ventilation zone It is located in the filter part by the strand side.

The objective of the invention is to create a ventilated filter cigarette that does not suffer from drawbacks cited above and whose filter elements get a reduction in the phase of smoke particles (such as for example nicotine) and at the same time a reduction over-proportion of the smoke components of the gas phase, it being desirable that the filtered smoke retain a composition acceptable to the consumer regarding taste.

In addition, it is desirable that the filter, while maintaining the advantages cited above, allow a wide range of variety for your sensory, haptic and optical design.

Another objective is to decouple the resistance to tensile filter retention of the filter, that is, achieve an increase in retention capacity for smoke components, without having to accept an increase substantial tensile strength, as is the case necessarily from conventional filter constructions.

Another object of the invention is to provide a product with the advantages mentioned above for those markets in which they are rejected, both for sensory reasons and for haptic reasons, camera filters and in particular products filled with activated carbon.

To achieve this goal serves a cigarette of the type mentioned at the beginning, which also presents the characteristics provided in claim 1.

Next, the invention will be described. referring to exemplary embodiments:

Figure 1 is a schematic representation of a cigarette with filter according to the invention.

Figure 2 is a schematic representation of another embodiment of a filter cigarette according to the invention.

Said filter cigarette is constituted by a strand part 10 and a filter 20. The strand part 10 is formed by a strand of tobacco 11 in one piece and a wrap 12 surrounding the tobacco strand 11. Filter 20 is made up of at least two filter parts 22 and 23 and is attached to the part of strand 10 by means of a wrapping paper 13, which is longer than the filter 20 in at least 3 mm. Normally, the tobacco thread 11 has a length between 55 and 75 mm, while the filter length 20 is between 21 and 27 mm.

In the area of the filter part on the side nozzle, filter 20 is vented. The degree of ventilation can be selected in the range of 10 to 90%.

In the area of the filter part on the side nozzle 22, the wrapping paper 13 is provided with holes of ventilation 14 which serve as ventilation means and are arranged in the form of 1 to 3 rows, preferably 2 rows, of holes around the filter 20 while in the area of the filter part on the thread side 23 the wrapping paper 13 is completely waterproof. When smoking the cigarette, the air of ventilation 14 is sucked into filter 20, which causes a over-proportional reduction of the gas phase components of tobacco smoke compared to the reduction of the phase of particles In one embodiment, the ventilation means it can also protrude slightly, up to about 2 mm, of the filter part by the mouth side and enter the part of strand side filter. In this case, the ventilation air, after being diverted, it is also aspirated to the filter part by the mouth side 22.

It is known by experts in the field how the ventilation holes must be produced, for example by way mechanical or electrostatic or by means of laser perforations. Other equally known ventilation means include tubes, cannulas or notches.

The filter part on the mouth side 22 is It consists of at least one filter segment. Filter part on the mouth side 22 it can also be composed of two or more plugs filter, as shown in Figure 2. This offers more possibility of variation in filter materials, such as by example the possibility of using, in addition to the filter element vented 22b by the mouth side, another filter element 22a, which can present, in the cross section of the same, a print or a coloration

The filter part on the thread side 23, which forms a coaxial filter, has a core 24 and a jacket 26 that surrounds the core coaxially. Core 24 drop It can be between 10 and 50 mmWS. The shirt 26 is designed such that its pressure drop exceeds that of core 24 at least by one factor of 2. Shirt 26 can also be substantially impervious to smoke The surface 25 of the core 24 has been made substantially impermeable to smoke or has been wrapped with a material impervious to smoke

The construction of the filter part on the side Strand 23 causes the smoke to flow mainly through the core 24. The narrowing of the cross section increases considerably the speed of the smoke stream within said core segment, which inherently entails a increased tensile strength, maintaining a relatively low retention. An analogous effect is obtained if the narrowing of the cross section of the material by which smoke flows is caused by the fact that the plug core of Coaxial filter has become almost waterproof, so all the Smoke will flow in this case exclusively through the shirt.

Only when the speed of the smoke stream many times over the filter part by the strand side 23, much greater will be the air supply of ventilation to the filter part by the mouth side 22 by means of the ventilation means 14. This achieves a decrease over-proportion of the components of the gas phase in comparison with the particle phase, guaranteeing it Tensile strength time acceptable to the smoker.

Contrary to the state of the art, the design variation possibilities within the target set are very many, since the cigarette with filter according to the invention produces an overproportional decrease in components of the gas phase without great effect on the ease of aspiration, whereby the typical effect is not observed that smokers call "air flavor".

Filter materials that are suitable for filter 20 include sheet-shaped, shaped filter materials fiber or granulate form, such as cellulose, esters of cellulose, preferably cellulose acetate, filter material of the type "meltblown", prepared for example according to the document WO 97/33026, filter material of the "airlaid" type, prepared for example according to US 4,375,447, filter materials a those that can be added additives, tobacco, for example tobacco reconstituted according to DE 199 25 968, other materials of Easy degradation filter or thermoplastic filter fibers.

The addition of additives can be used for Sensory, haptic or optical improvement of the cigarette according to the invention and / or present an additional effect on selective retention. So, for example, a filter element of the filter part 22 can be provided with activated carbon particles, in order to increase adsorption of the gas phase. To increase additionally the favorable reception of the cigarette between consumers by means of optical agents, for example the plug of filter on the mouth side may be provided with a color. The addition of acids or bases allows to influence the pH values of the particle spectra and with it the effect with respect to flavor.

The additives can be added by spreading medium or projection on the filter materials, by example fibers, or alternatively by direct injection into the strand of material.

Among the additives that are suitable for the material of filter, the following are included: Aromatic substances, acids or bases in suspended or dissolved form, or retention additives selective, adsorbents, such as activated carbon or SiO2. Others additives with selective retention action include organic acids and bases, for example hydroxycarboxylic acids, and their salts, metals and metal oxides, nitrogen components, systems of ion exchangers (eg zeolites), alcohols, polyphenols and porphyrin derivatives.

Other additives, such as plasticizers, by example triacetin, triethylene glycol diacetate or citrate diethyl, additives that accelerate photodegradation, for example oxide titanium, additives that favor biodegradability, vitamins and / or colored pigments are suitable for the individual design of the Desired filter construction.

For the embodiments of the Specification of cellulose acetate, the intervals are suitable following: For kernel 24 an individual title in the interval from 3.8 to 8.0 den, preferably 8.0 den, and a global title in the range from 15,000 to 50,000 den, preferably 17,000 den. For shirt 26 an individual title in the range of 1.5 to 3.0 den, preferably 2.1, and a global title in the range of 40,000 to 75,000 den, preferably 55,000 den.

The range of individual titles for the filter part on the mouth side 22 in the case of cellulose acetate as a filter material, which can be composed of two or more segments same or different 22a and 22b, is 1.5 to 5 den and the title Global is 15,000 to 60,000.

Example 1

Cigarette A contained a strand of tobacco 11 63 mm long and a multi-part filter 20 of 21 mm long.

The core 24 of the filter part on the side of Strand 23 had a diameter of 5.5 mm with a length of 8.0 mm. I know composing of cellulose acetate with an individual title of 6.0 den and a global title of 17,000 den. Tensile strength or Core 24 drop was 27 mmWS.

The jacket 26 surrounding the core 24 coaxially It had an internal diameter of 5.5 mm and an external diameter of 7.8 mm with an equal length of 8.0 mm. The material used was cellulose acetate with an individual title of 2.1 den and a title overall of 55,000 den.

Therefore, the added length of the filter Coaxial was 8.0 mm with a diameter of 7.8 mm.

The filter part on the mouth side 22 was designed in one piece and made up of acetate cellulose. It had a diameter of 7.8 mm with a length of 13 mm. In the area of the filter part on the mouth side, it is planned a ventilation zone in the form of a series of perforations by To be. The filter ventilation of cigarette A was 35%.

Example 2

To evaluate cigarette A of Example 1, it is determined the smoke analysis data and compared with the of a V1 cigarette that was provided with an acetate filter of 21 mm long conventional cellulose and an individual title of 3.0 den as well as an 18% filter vent and smoked according to ISO. The results of smoking cigarette data have been compiled in Table 1.

TABLE 1

one

Example 3

Cigarette B contained a strand of tobacco from 59 mm long and a multi-part filter 20 of 25 mm long.

The core 24 of the filter part on the side of Strand 23 had a diameter of 5.5 mm with a length of 10.0 mm. It was composed of cellulose acetate with an individual title of 6.0 den and a global title of 17,000 den. Tensile strength or the pressure drop of core 24 was 25 mmWS.

The jacket 26 surrounding the core 24 coaxially It had an internal diameter of 5.5 mm and an external diameter of 7.8 mm with a length of 10.0 mm. The material used was cellulose acetate with an individual title of 2.1 den and a title overall of 55,000 den.

Therefore, the summed length of coaxial filter 23 it was 10.0 mm with a diameter of 7.8 mm.

The filter part on the mouth side 22 was designed in one piece and made up of acetate cellulose. It had a diameter of 7.8 mm with a length of 15 mm. In the area of the filter part on the mouth side 22, it has been provided a ventilation zone in the form of a series of holes of ventilation 14, performed by laser drilling. The Cigarette filter ventilation B was 51%.

Example 4

To evaluate cigarette B of Example 3, we determined the smoke analysis data and compared with the of a V2 cigarette that was provided with an acetate filter of conventional cellulose 25 mm long and an individual title of 3.0 den as well as a 38% filter vent and smoked according to ISO. The results of smoking cigarette data have been compiled in Table 2.

TABLE 2

two

From the examples, it can be seen clearly that the decrease of the components of the gas phase of cigarette smoke compared to those of the phase of particles by means of the new filter construction is overproportionally high.

Claims (15)

1. Cigarette with filter comprising a strand of wrapped tobacco and a filter (20) with a means of ventilation, said filter being composed of at least two filter parts (22, 23),

-

being the means of ventilation arranged in the area of the filter part by the mouth side (22) and

-

being part of filter on the mouth side (22) a filter part of at least one piece and the filter part being on the side of the strand of tobacco (23) a coaxial filter part with a core (24) and a shirt (26);

characterized because

-

the tobacco strand (11) is a thread in one piece and because

-

pressure drop of the core (24) is less than the pressure drop of the jacket (26).

2. Cigarette with ventilated filter according to claim 1, characterized in that the filter part by the mouth side (22) is constituted by a filter material in the form of a leaf, in the form of fiber or in the form of granules or a filter material degradable 3. A ventilated filter cigarette according to claim 2, characterized in that the filter material used is cellulose, cellulose esters, preferably cellulose acetate, a filter material of the "meltblown" type, a filter material of the "airlaid" type, a filter material to which additives, tobacco, other easily degradable filter materials or thermoplastic filter fibers can be added. 4. Cigarette with ventilated filter according to claim 2 or 3, characterized in that an additive has been added to the filter material. 5. Cigarette with ventilated filter according to claim 4, characterized in that the additives used are aromatic substances, acids or bases in suspended or dissolved form, or selective-acting adsorbents, such as activated carbon or SiO2. 6. Cigarette with ventilated filter according to any one of claims 1 to 5, characterized in that the core (24) of the coaxial filter part by the strand side (23) is composed of a thick-capped filter material, the value for the individual title in the range of 3.0 to 8.0 den and the value for the global title in the range of 15,000 to 50,000 den. 7. Cigarette with ventilated filter according to claim 6, characterized in that the individual title is 6.0 den and the overall title 17,000 den. 8. Cigarette with ventilated filter according to any of claims 1 to 5, characterized in that the jacket (26) of the coaxial filter part on the side of the tobacco strand (23) is composed of a filter material with an individual title between 1.5 to 3.0 den and with a global title between 40,000 to 75,000 den. 9. Cigarette with ventilated filter according to claim 8, characterized in that the individual title is 2.1 den and the overall title 55,000 den. 10. Cigarette with ventilated filter according to claim 1, characterized in that the ratio of the pressure drop of the core (24) to that of the jacket (26) is greater than 2. 11. Cigarette with ventilated filter according to claim 10, characterized in that the ratio of the pressure drop of the core (24) to that of the jacket (26) is 6. 12. Cigarette with ventilated filter according to claim 1, characterized in that the surface of the core (24) has been wrapped with an air impermeable material or made air impermeable. 13. Cigarette with ventilated filter according to claim 1, characterized in that the reduction of the components of the gas phase achieved by means of ventilation is between 10 and 90%. 14. Cigarette with ventilated filter according to claim 13, characterized in that the reduction of the components of the gas phase achieved by means of ventilation is between 10 and 50%.

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15. Cigarette with ventilated filter according to claim 1, characterized in that the ventilation means extend beyond the mouth part towards the filter part located on the side of the strand, the ventilation air being diverted towards the mouth part.