DE1632263A1 - Filter tips for cigarettes and cigars - Google Patents

Description

Filter tips for cigarettes and cigars

The invention relates to filter tips for cigarettes and cigars and the filter material contained in these tips or distributed over the length of the cigarette or cigar. It also relates to filters for pipe pipes. _:

The use of adsorptive substances such as charcoal, diatomaceous earth and silica gel, alone or in conjunction with commonly used crimped papers, fibers, or other filter media for the filtration of tobacco smoke is well known.

It is also known to add seasonings or the like to the Bringing filter medium into the tobacco smoke passing through the filter before it is inhaled by the smoker.

In general, the seasoning is from the adsorbent material recorded before this is brought into the filter »However could not the previously known, above-mentioned solutions completely satisfied, either because of the irregular release of the seasonings or because of the adsorbent material holds some smoke components that contribute to its taste and flavor.

The invention is based on being expanded and exfoliated Vermicult as an adsorptive material is, on the one hand, an unexpected one brings about a slight reduction in those smoke components that give the smoke a pleasant taste and flavor, on the other hand, however, has the property of some constituents remove from the gas phase, which is a smoke with inferior biological Activity (measured according to the Parameclum test) deliver as unfiltered smoke. '

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Furthermore, condiments or the like from vermiculite during of the smoke passage released to a relatively constant extent, if they are from this before its use in the filter were adsorbed.

The invention thus consists in the use of vermiculite as adsorption material in filters and filter media for tobacco smoke. -

Below is the effect of using vermiculite described in more detail.

In some preferred embodiments of the invention, the vermiculite is used in conjunction with activated charcoal, wherein it has been found that the combination brings unexpectedly higher properties than when the two components for see used alone. Thus, since the vermiculite allows the passage of the particulate phase of the smoke, the Loss of flavor and flavor properties of the smoke entirely insignificant, especially when compared to smoke filtered through activated carbon alone.

Another property of vermiculite is its ability to Contribute additives that change the composition of the smoke be added. For example, he can use Alkali carbonates and hydroxides pretreated or mixed to reduce the release of acidic compounds, or with hydrogenated iron oxides, which reduce the release of gaseous sulfides in the smoke, or with polyethyleneimine, which improves the seasoning and removes acidic substances, furthermore with other seasoning substances, to give the smoke any particular one To. Give flavor; it can also be made with modified keratin material are mixed to produce thiol-reactive substances from the smoke to absorb.

The ability of vermiculite to form gas phase components of smoke to filter out is done by adding as described above Additives not affected. The vermiculite can be in a

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Cigar or cigarette are used as one of the filter media in. a filter plug, which consists of two or more in a row lying filter masses can exist.

Specifically, at least one of the exceptions -'Vermiculite present masses wholly or partially made of activated carbon exist.

The mass or one of the masses that does not contain vermiculite will preferably end at the one in the direction of flow located section of the filter plug between the vermiculite and the mouth of the smokeÄ, thereby preventing penetration of vermiculite granules in the mouth.

The filter mass containing the vermiculite can be in the form of a Have composite rods, in which a thermoplastic material, a cold-setting binder or certain inorganic Salts, e.g. silicates, especially sodium 11icate, used to bind the vermiculite granules together into a stick that goes into a conventional machine can be used for the production of filter plugs. The vermiculite can, however, also in a conventional manner Chamber in the form of loose granules recessed in a filter plug contained or distributed between the threads of an ordinary filter plug made of cellulose acetate; one can but also let it adhere to the surface of paper, the then formed into a filter plug by known methods will* ·

It was found that vermiculite components of the gas phase of the Removes smoke, but not components of the solid phase, while other known filter media, e.g. activated carbon, remove components from both phases Using activated carbon in a filter for removal components of the gas phase cause a significant loss of taste and flavoring the smoke. By mixing vermiculite and activated carbon can change the properties of the smoke after passage be balanced by the. filter, with the amount of

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Filtration of components of the gas phase and the solid particle phase can be regulated by the ratio of vermiculite and activated carbon. So instead of the one described above Examples of vermiculite mentioned alone are an intimate mixture of Vermiculite and activated ^. Carbon particles are used.

In experiments which led to the invention, it was found that a length of the carbon portion of 5 mm is a very satisfactory length for a filter. If charcoal only 2.5 mm long was used, twice the vapor phase yield was achieved, which means that the filtration efficiency of volatile aldehydes decreased from -60 to 16%.

The carbon length of 2.5 mm was then extended to 5 mm with an inert material such as glass beads and it was found that the yield of aldehydes changed little and the filtration efficiency increased by only about 2 % .

If, on the other hand, vermiculite is used instead of glass beads, the results achieved differ fundamentally from the expected. Vermiculite is considered an inert substance; However, if he is one Charcoal of 5 mm length is added to a filter length of 5 mm increases the filtering effect for volatile Aldehydes to a value equal to or higher than that of a carbon bed 5 mm in length.

Vermiculite shows some absorption for aldehydes, although this is not very high. It is of the order of 20%. When combined with charcoal (potency about 60 %) the expected potency would be the average of the two, ie 40 % with a 50:50 mixture. However, the actual potency was found to be about 65%.

Volatile aldehydes were due to their removal Their considerable importance is dealt with in detail, however, shows the combination of coal and vermiculite as. filter still other unusual traits. 'The filter effect on the other hand

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Phenols only decrease by a small amount (approx. 10 ° / a) with the addition of vermiculite. There is evidence to suggest that a mixed udder removes more volatile acids than charcoal or vermiculite on their own. The mixed filter also delivers a smoke that contains far less nicotine. These points are also very desirable for a filter. It can be seen from this that the vermiculite does not serve as an inert extender, but takes an active part in the filter process through a mechanism that has not yet been clarified; If the 2.5 m vermiculite is not mixed with the 2.5 mm charcoal, but is placed as a separate filter mass in front of or behind the charcoal, a slight difference is observed between the filter properties of this multiple filter and a filter with a mixed bed. -

In addition, the vermiculite component of the mixture can be added may be used, flavoring substances or other additives for enhancing the smoke with any desired flavoring to wear.

According to other examples, modified keratin material mixed with the vermiculite to form thiol-reactive substances absorb from the smoke.

The principles according to the invention can also be used for pipe filters, those for cigars or for tips for smoking tobacco products are used.

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Claims (13)

Claims 1)! Tobacco smoke filter, characterized in that it is made of peeled Consists of or contains vermiculite. . _ 2) Filter according to claim 1, characterized in that it is additionally one or more of the substances alkali carbonate, Contains alkali hydroxide, iron oxide hydrate, polyethyleneimine or a condiment, this substance being appropriate to vermiculite is incorporated into a filter prior to its design. 3) Filter according to claims 1 and 2, characterized in that that the particles by a thermoplastic material, a cold-curing binder or an inorganic silicate are connected to each other. 4-) Filter according to claims 1-3 »characterized in that that it consists of a filter plug that contains a particle is made of exfoliated vermiculite containing chamber. consisting of a plug of fibers 5) Filter according to claims 1 - 4 -, / characterized in, that exfoliated vermiculite particles are dispersed therein. 6) Filter according to claims 1-4, consisting of one Plugs made of paper or similar material, characterized in that that particles of exfoliated vermiculite adhere to the surface of this material. 7) Filter according to claims 1-6, characterized in that that it consists of a body of exfoliated vermiculite particles and activated charcoal particles that work together are mixed. 8) Filter according to claims 1 - 7 »consisting of two bodies, which the smoke to be filtered passes through one after the other, Ό09844 / U3i characterized in that one of the "two bodies is formed from exfoliated vermiculite and the other from activated carbon, the vermiculite being expediently arranged _facing away from the smoker's mouth. Λί: ^ .i:.. 9) Filter according to claims T - 8, characterized in that that it consists of a body made of modified keratin meterial and particles of exfoliated vermiculite which are mixed together. 10) pipe filter consisting of a tubular container open ended at least partially with a smoke filter is filled according to the preceding claims. 11) cigarette or cigar, consisting of an outer shell, a charge of tobacco within the same and a tobacco smoke filter as claimed in any preceding claim which is derived from the Outer shell is enclosed at one of its ends. 12) cigarette containing a certain amount of smoking tobacco in a tubular envelope and a smoke filter according to one of claims 1-10 located in a second tubular envelope and at one end of the first envelope adheres. ; 13) Cigarette holder that has a cavity through which cigarette smoke is drawn when in use, and in which a filter according to claims 1 - Ϊ0 is located *. ,, ORiQHMALINSPECTED ooae44 / 143t - ·; - ;; ' -