Cigarette filter

FIELD: cigarette industry.

SUBSTANCE: cigarette filter has filtering sections including filtering materials, individually wrapped with wrapping paper; forming paper for wrapping filtering sections together; and tip paper for covering of forming paper so as to join filtering sections with cigarette section for producing of cigarette. Cigarette filter has adsorbents such as activated carbon and silicon dioxide/aluminum oxide in at least one of filtering materials or in space between filtering materials.

EFFECT: improved taste and aroma of cigarette and provision for selective removal of predetermined components contained in main flow smoke.

7 cl, 5 dwg, 1 tbl

 

The present invention relates to an improved cigarette filter is able to effectively adsorb certain components contained in the main stream smoke.

In the description of Japanese patent (Kokai) No. 63-160659 disclosed, for example, deodorant (absorbing) agent, containing a porous material based on inorganic minerals, including iron sulfate/L-ascorbic acid. This document also described, for example, cigarette filter containing a deodorizing agent.

However, the adsorbent disclosed in this document is intended for adsorption mainly ammonia, and in this document generally not described, that smoke components the main thread deleted in the case where the adsorbent is in a cigarette filter. Usually when you use a filter containing an adsorbent capable of selectivity to adsorb various components contained in the smoke of the main flow, as is well known in this field, the taste and aroma of the cigarette undesirable worse.

The present invention is to create a cigarette filter, which allows to significantly reduce the negative impact on the taste and aroma of the cigarette while also allowing for selective removal of specific components contained in the main stream smoke.

Cigarette filter according to the invention soderjatelnoe section, including filter materials, individually wrapped wrapping paper; forming a paper for joint wraps of the filter sections, and double paper covering forming the paper to connect the filter section of the cigarette section with getting the cigarette to the filter, characterized in that it contains, as adsorbents, activated carbon and silica/alumina of at least one of the filter materials or between the filter media.

In the cigarette filter according to the invention the specified wrapping paper or forming a paper may contain activated carbon and silica/alumina as the adsorbent.

Cigarette filter according to the invention has a specific structure, including, for example, (1) structure formed by two filter materials and a mixture of activated carbon and silica/alumina loaded in the space between these two filter materials, (2) structure formed by two filter materials and a mixture of activated carbon and silica/alumina, distributed in one of these filter materials, (3) structure formed by three filter media and activated carbon, and silicon dioxide/aluminum oxide, separate the spine, loaded in two spaces between these three filter materials, and (4) structure formed by three filter media, activated carbon, distributed in the same filter material, and a silicon dioxide/aluminum oxide, dispersed in the other filter material. Another cigarette filter according to the invention includes the case of cigarette mouthpiece containing placed in it, filter materials, and is characterized in that it contains, as adsorbents, activated carbon and silica/alumina of at least one of the filter materials or between the filter media.

However, the structure of a cigarette filter according to the invention is not limited to the above examples, and various modifications are possible.

Brief description of drawings

Fig. 1 is a schematic example of the structure of a cigarette filter according to the invention.

Fig. 2 is another example of the structure of a cigarette filter according to the invention.

Fig. 3 is another example of the structure of a cigarette filter according to the invention.

Fig. 4 is a schematic view of an additional example of the structure of a cigarette filter according to the invention.

Fig. 5 is a view in cross section of the cigarette mouthpiece, which used cigarette filter according to the invention.

A preferred variant of the invention

Infusion is her invention is directed, in particular, the removal of pyrazines and phenols as specific components contained in the main stream smoke of cigarettes.

The authors of the present invention found that when the activated carbon, and silicon dioxide/aluminum oxide are contained as adsorbents in cigarette filter, these adsorbents provide such a synergistic effect that is particularly well-deletes the specified components contained in the main stream smoke, solving the tasks of the invention.

Filter materials used in the present invention include, for example, acetate, paper and non-woven material. As activated carbon adsorbents for you to use activated carbon from coconut shell. As a silicon dioxide/aluminum oxide adsorbents can be used, for example, Kyoward 700SN company Kyowa Chemical Industry Co., Ltd. This product contains 63.0 wt.% SiO2and 10.3 wt.% Al2O3and loses drying of 14.5 wt.%.

In the present invention, the amount of activated carbon and silicon dioxide/aluminum oxide set as follows: if adsorbents are distributed in the filter material, the total number of adsorbents must be from 1 to 150 mg, preferably from 20 to 60 mg per 10 mm of the filter material, and if adsorbents are in the space between filtrowa and materials, the total number of adsorbents should be from 5 to 300 mg, preferably from 30 to 120 mg per 5 mm space.

The following describes the embodiments of the invention.

The control cigarette filter that does not contain any adsorbent prepared as follows. Two filter media (filters circular cross-section) is produced by forming acetate, having a thickness of filament of 2.2 denier and harness 40000 denier, obtaining a segment length of 10 mm, and filter materials wrap wrapping paper to get the two filter sections. Two filter media have to provide between them a 5 mm space, and the two filter sections are wrapped together forming a paper without loading any of the adsorbent in the specified space. The ventilation resistance of the filter, as installed, is 80 mm H2On (1050 ml/min).

In Fig. 1 shows an exemplary cigarette filter. Cigarette filter 1 is manufactured as follows. Two filter material (simple filters) 2 is obtained by forming acetate from the thick filament of 2.2 denier and harness 40000 denier, obtaining a segment length of 10 mm, and the filter material wrapped individually wrapping paper to get the two filter sections. Two filter sections have so that IU is do them was space, and two filter sections wrap forming the paper to be loaded in this space a mixture of 30 mg of activated carbon, 41 and 30 mg of silicon dioxide/aluminum oxide (trade name: Kyoward 700SN) 42 as adsorbents. In this case, the space is adjusted so that the adsorbent had 100% bulk density.

For comparison, were also produced cigarette filters loaded within the space of 30 mg only activated charcoal or 30 mg only silicon dioxide/aluminum oxide as the adsorbent.

In addition, to make cigarette filters loading into the space 60 mg only activated charcoal or 60 mg only silicon dioxide/aluminum oxide, that is two times more absorbent than in cigarette filters mentioned above. Each of these cigarette filters attach the strip to the cigarette section, obtained by wrapping the shredded tobacco wrapping paper to get to research different cigarettes that differ from each other by the type of adsorbent, as shown in table 1. For the cigarette sections used commercial cigarette rod. Study of the main stream smoke was carried out on these cigarettes, as follows.

A cigarette was attached to a machine for the automatic Smoking with a pipe made of Tigana (Tygon). Cambridge Phi is Tr do not use. Machine for the automatic Smoking were allowed to smoke a cigarette under standard conditions area with a specified length of combustion to 40 mm in the main stream Smoke from the exhaust holes collected in a gas bag, made of Tedlar (Tedlar) and containing helium, placed it in advance, and then the internal volume of the gas bag made with helium up to 8 liters in total. Fifty ml of gas taken from the gas bag, were analyzed using gas chromatography.

Take into account pyrazine, phenols, hydrocarbons and ketones as specific components of the smoke of the basic stream and the data analysis of each of the specific components received on the basis of the peak area issued by a gas chromatograph. Table 1 presents the passage of the filter pyrazinamid and phenols. The passage That each of the specific components was determined by the formula:

TA=AA/Acnt

where Acnt is the peak area of a particular component in the gas chromatograph in the case where the adsorbent is not used (control), and AA is the peak area of a particular component in the gas chromatograph in the case of using the adsorbent "a". Each measured value is presented in table 1, obtained on the basis of the peak area of a specific component in a gas chromatograph.

In addition, the predicted value pass filter, which used 60 is g activated charcoal, mean square of the measured value pass filter, which used 30 mg of activated charcoal. Similarly, the predicted value pass filter, which used 60 mg of silicon dioxide/aluminum oxide, the mean square of the measured value pass filter, which used 30 mg of silicon dioxide/aluminum oxide.

On the other hand, the predicted value of the passage in the case of using two types of adsorbents are presented in table 1, indicates the calculated value of passing obtained on the basis of the passage of the adsorbent in the case of use of each of the adsorbents of the two types. Specifically, the predicted value was determined by the formula (Ta×Tb), where TA denotes the passage (measured value) of a specific component in the case of using the adsorbent "a"and Tb means passing (measured value) of a specific component in the case of using the adsorbent "b".

If the measured value pass in the case of using a combination of several adsorbents of different types is significantly less than the predicted value, then this may indicate that these components are absorbed particularly well, confirming the synergistic effect provided by the combination of adsorbents. Table 1 presents the results described the research.

Table 1
The adsorbentPenetration
PyrazinePhenols
Measured-Noah

value
Pre-story.

value
Measured-Noah

value
Pre-story.

value
No1,001,00
Activated carbon (30 mg)0,600,68
Silicon dioxide/aluminum oxide (30 mg)0,730,61
Activated charcoal (60 mg)0,380,360,480,46
Silicon dioxide/aluminum oxide (60 mg)0,540,530,380,37
The mixture of activated carbon (30 mg) and silicon dioxide/aluminum oxide (30 mg), (60 mg)0,220,440,300,41

When using only one activated carbon double or using only the silicon dioxide/aluminium oxide in double the amount found no significant differences between the measured and predicted values.

The difference between the measured and predicted values for small hydrocarbons and ketones (table not shown), and therefore, the synergistic effect provided by the combination of several adsorbents, not detected.

On the contrary, when used as adsorbents combination of activated carbon and silica/alumina, the measured values significantly below the predicted values, in the case of pyrazines and phenols, as shown in table 1, which clearly confirms the synergistic effect on exceptional adsorption of these specific components.

From the results above, it is clear that if a component such as pyrazine and phenols, must be effectively adsorbed using only the activated charcoal or silica/alumina, it is necessary to increase the amount of adsorbent. In this scenario, you expect a noticeable deterioration of the taste and flavor of cigarettes. On the other hand, in the case of use as adsorbents in combination of activated carbon and silica/alumina, it is expected that components such as pyrazine and phenols, can be effectively adsorbed, even if the number of adsorbents is small, and therefore, their influence on the taste and aroma of the cigarettes less.

In Fig. 2 presents another note what R the cigarette filter according to the invention. Cigarette filter 1 is prepared as follows: make three filter material (simple filters) 2; form three filter sections by wrapping wrapping paper 3 around each of the filter material 2, load, separately, activated carbon 41 and silicon dioxide/aluminum oxide (trade name: Kyoward 700NS) 42 as the adsorbent 4 in the space from the shredded tobacco and the space inside the mouth between the three filter sections; and wrap forming paper 5 around the three filter sections. In Fig. 2 presents an example in which the activated carbon 41 loaded in the space inside the mouth, and silicon dioxide/aluminum oxide loaded into the space from shredded tobacco. However, in another embodiment, silicon dioxide/aluminum oxide 42 may be loaded into the space inside the mouth, and activated carbon 41 can be loaded into the space from shredded tobacco.

In Fig. 3 presents another example of a cigarette filter according to the invention. Cigarette filter 1 are as follows: make the filter material (simple filter) 2, obtained by molding acetate, and other filtering material 21 is obtained by forming acetate, containing as adsorbents activated carbon 41 and silicon dioxide/aluminium oxide is dissolved, edelenyi therein; form two filter sections by wrapping wrapping paper 3 around each of the filter material 2 and 21; and wrap forming paper 5 around the two filter sections.

In Fig. 4 presents another example of a cigarette filter according to the invention. Cigarette filter 1 are as follows: make the filter material (simple filter) 2, obtained by molding acetate, filter media (activated carbon filter) 21 obtained by molding acetate containing activated carbon as adsorbent, distributed therein, and filtering material 22, obtained by molding acetate containing silicon dioxide/aluminum oxide as distributed therein adsorbent form three filter sections by wrapping wrapping paper 3 around each of the filter material 2, 21 and 22; and wrap forming paper 5 around the three filter sections. The location of the filter materials 21 and 22 has no special restrictions. Any of these filter materials can be placed on the side of shredded tobacco.

In addition, the cigarette filter according to the invention is activated carbon, and silicon dioxide/aluminum oxide can be added as an adsorbent to form paper.

Cigarette filter according to the invention can be used in the form of cigarette mongst the ka, it is shown in Fig. 5. The mouthpiece includes a cylindrical housing 51 having converted to the mouth part 52 formed on one end, two of the filter material 2 located inside the housing 51, and a mixture of activated carbon 41 and silicon dioxide/aluminum oxide 42 as adsorbents 4 loaded in the space between the two filter materials 2.

Cigarette filter shown in Fig. 5, is obtained using the mouthpiece of the structure shown in Fig. 1. In addition, the mouthpiece, you can use the structure shown in each of the drawings Fig. 2-4.

In the cigarette filter of any type described above synergistic effect is activated carbon and the silicon dioxide/aluminum oxide so that especially good adsorbs pyrazine and phenols.

Industrial applicability

In accordance with the present invention it is possible to get a cigarette filter, which allows you to selectively remove specific components contained in the main stream smoke, while reducing the impact on the taste and aroma of the cigarette.

1. Cigarette filter containing the filter section containing filter materials, individually wrapped wrapping paper, form paper to wrap together the filter sections and double paper covering forming the paper to denite filter section of the cigarette section with obtaining cigarettes with filter, characterized in that it contains as adsorbents activated carbon and silica/alumina of at least one of the filter materials or between the filter media.

2. Cigarette filter according to claim 1, characterized in that the wrapping paper or forming paper contain as adsorbents activated carbon and silica/alumina.

3. Cigarette filter according to claim 1 or 2, characterized in that it contains two filter material, and a mixture of activated carbon and silica/alumina loaded in the space between the two filter materials.

4. Cigarette filter according to claim 1 or 2, characterized in that it contains two filter material, and a mixture of activated carbon and silica/alumina dispersed in one of the filter materials.

5. Cigarette filter according to claim 1 or 2, characterized in that it contains three filter material, and activated carbon and silica/alumina loaded separately in the two spaces between the three specified filter materials.

6. Cigarette filter according to claim 1 or 2, characterized in that it contains three filter material, and activated carbon dispersed in one of the filtering material, and silicon dioxide/aluminum oxide is mixed into the other filter is eating the material.

7. Cigarette filter containing the body of the cigarette mouthpiece containing the filtering material located therein, characterized in that it contains as adsorbents activated carbon and silica/alumina of at least one of the filter materials or between the filter media.



 

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