DE2221778A1 - Cigarette and method of making it - Google Patents

Description

I / p 7402

Imperial Tobacco Group Limited, Imperial House, 1 Grosvenor Place, London SW1X 7HB, England

Cigarette and method of making it

The invention relates to cigarettes and a method for the production of cigarettes with a flavoring or fragrance. It also relates to a with a taste and. Scented filter cigarettes.

The invention relates to such additives which normally give a taste or a flavor during the inhalation Communicate the aroma to the puff and also reduce a heating or a hardness of the puff in order to achieve a softer and milder puff to get. Such additional flavorings or fragrances are volatile or unstable and are also insoluble in water.

A well-known flavoring agent for cigarettes is menthol. if however, free menthol is added to the tobacco in order to

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to produce a convenient menthol cigarette, there is a great loss of menthol due to the volatility of the menthol, during the manufacturing process of the cigarette, and furthermore, there is no uniform release of the cigarette during smoking Menthold vapor possible.

A known method of reducing such a loss of the The volatile flavoring agent consists in encapsulating the water-insoluble menthol before adding it to the tobacco. The menthol is held in by heat-breakable microcapsules, which break when the tobacco is breathed and the menthol vapor release in the breath. The menthol brings with it a so-called cool smoke and stimulates the throat down the smoke, it also imparts a characteristic taste and aroma to the smoke, which instantly recognizable and pleasant for some, but not all, smokers is.

The invention is based on the object of creating a cigarette provided with menthol or another flavoring agent, which can be smoked with pleasure by those who do not love the characteristic taste and aroma of menthol However, the invention does not apply to menthol as a flavoring agent limited. The insert or smoke composition for the cigarette can be made from tobacco, tobacco substitute or a mixture of tobacco and tobacco substitutes exist.

Experiments have shown that the concentration of flavoring agent in a cigarette insert can be viewed as falling into four ranges. The lowest or first range of concentration is too weak to diminish a throat stimulus caused by the smoke and to significantly influence the taste or aroma of the breath. In the next or second area the concentration is sufficient to detect the stimulus ^v:

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■ significantly degrade, but is unable to improve the taste • or to influence the aroma of the smoke enough to affect the flavoring agent to make it recognizable to the common smoker. This second concession area lies between a low one and high limit, which shall be referred to herein as "the effective threshold" and "the detection threshold". By doing third area, the concentration is sufficient to capture the stimulus, continue to reduce, but it also affects the taste and the aroiaa so that the common smoker will recognize the flavoring agent. In your highest or fourth area puts the Concentrating the stimulus down even further, and the flavoring agent is easily identifiable as it is with conventional ones menthol-containing cigarettes, for example, is known.

According to the invention is a method of dispensing a cigarette with one held in breakable or burstable microcapsules Taste smifcfcel provided "in which the concentration of the encapsulated flavor relative to the cigarette insert lies between limits corresponding to the "effective threshold" and the "detection threshold".

With a further development of the invention contains a cigarette. a flavoring agent held in burstable or breakable microcapsules in which the concentration of the encapsulated flavoring agent relative to the cigarette insert is between limits which correspond to the "effective threshold" and the "detection threshold".

The invention is illustrated by way of example in the accompanying drawings. -

In a process diagram, FIG. 1 shows a process for Manufacture of microencapsulated menthol.

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FIG. 2 shows in a table the effects of different concentrations of a menthol on the smoker.

Figure 3 is a longitudinal section through a filter tip cigarette and shows taste microcapsules distributed in a tobacco insert rod.

example 1

With reference to Figure 1, the materials used consisted of:

material

supplier

Menthol gelatin

In crystalline form from BDH (Chemicals) Ltd. from Poole, Dorset.

in powder form from BDH (Chemicals)

Ltd.

Acacia gum

in powder form from Kopkins and Williams Ltd. from Romford, Essex.

Vegetable oil

Cooking oil sold under the registered trademark (Mazola "by Brown & Polsen, Esher, Surrey.

Cety! Alcohol

Technical cetyl alcohol from BDH (Chemicals) Ltd.

Glutaraldehyde

from! Koch-Light Laboratory Ltd. , Colnbrook, Buckinghamshire.

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The ones used to make microencapsulated menthol Process stages are shown in the figure diagram according to FIG. The sol and the prepared at stations 10, 11

at
Solution are brought together and / a station 12 emulsified. After adding the sol from station 13, the resulting mixture is mixed at station 14. It. It has been found that the pH value of 4.20 of the mixture at station 14 ^ is critical for subsequent successful encapsulation of the menthol additive. Water is added from station 15 and the mixture is then whisked while cooking on station. At this stage, the future wall material develops from the aqueous solution as a coacervate and forms an uninterrupted liquid coating around each menthol core. The aqueous solution from station 17 is added, and the mixture is whisked at station 18, the coating hardens and, as a result of heat, forms burstable or breakable microcapsules which hold the volatile menthol in place. These capsules fall in the general diametrical range of 0.005 to 0.04 mm (5-40 microns). The capsule slurry can be diluted with water to facilitate its spray application.

The encapsulated menthol can be applied to the cigarette liner in the form of a flight-hardened shredded tobacco in the following way Way to be applied.

Contains the device for introducing the encapsulated menthol a horizontal, rotatable drum, which with inner Centrifugal paddles is provided, a conveyor for feeding the tobacco shredded or clipped tobacco to an invitee the drum, spray heads which are part of a compressed air spray system at the other or outlet end of the drum, and a vertical exit pipe under the outlet end of the drum, The spray heads should spray the menthol capsules, and im

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In operation, the chips or tobacco clippings are placed in the drum inlet fed from where it is rotating along the Drum moves further, being thrown and torn apart by the drum blades. When the schnitzel from the Fall out of the drum outlet, they will be a drizzle of Menthol capsules from the nearby spray heads are subjected and fall down through the outlet pipe and become a cigarette machine therein supplied for making cigarettes.

The schnitzel feeder and the capsule sprayer are carefully regulated to provide the schnitzel with the required concentration of encapsulated menthol being an estimated Loss of menthol capsules during spraying and final Cigarette manufacturing is taken into account. Consequently the menthol concentration in the finished cigarette is below the limit corresponding to the detection threshold, but is above it the limit corresponding to the effective threshold (Figure 2). The concentration of encapsulated menthol in the finished cigarette is within the range of 75 "to 200 parts per million Parts of the cigarette liner and is preferably 100 parts per million (100 p.p.m.). As shown in Figure 3 diagrammatically the menthol capsules 29 are as uniform as possible through a rod of tobacco insert 30 in a filter tip cigarette 31 distributed. Of course, the cigarette does not need to have a filter mouthpiece either.

While the cigarette is being breathed, the capsules break through the heat of the advancing, burning glow and add the evaporated menthol to the Haucherstroti, whereby such a release is essentially smooth and steady takes place while smoking.

The cigarette can be used in any other suitable manner encapsulated flavorings or fragrances. Instead of for example the flavor capsules on the insert

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for a cigarette, -can on the wrapping- $ material, "for example cigarette paper or tobacco leaf Spraying or brushing can be applied. The wrapping material treated in this way is then folded around the insert rod, so that the capsules are attached to the insert through the cigarette envelope worn four den.

»
Example M 2

The solution of station 11 in figure. 1 is replaced by the following Solution replaced, with the ingredients in parts by weight are reproduced.

Menthol 60 parts,

Benzyl benzoate 24 parts,

Benzyl alcohol 8 parts,

Other additives G parts.

The menthol is intended to obtain a mild odor, the benzyl benzoate and benzyl alcohol provide a solution for the menthol, and the further additive is a flavor enhancer. The latter can be prepared from an aromatic aldehyde, i. Vanillin, or gamma lactone, is made up of octalactone. If the solution is changed, the combined solvent and further additives do not exceed 2/3 of the menthol, while the ratio of the two solvents at 3s 1 must stay.

The encapsulated menthol is inside the finished cigarette of the range from 7p - 200 parts per million parts that Cigarette insert, while the concentration of the further additive is 1 - 7? "Parts per million parts of the insert. The process for making the pulp of microcapsules is

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otherwise in every respect the same as in Example 1. During smoking, the menthol reduces the stimulus of the throat caused by the smoke , while the further additive changes the taste or smell of the smoke. However, due to the concentrations used, the smoker cannot recognize and identify the menthol or the other additive.

•
Example 3

The solution of station 11 in Figure 1 is given by the following

cae

Solution replaced, with / components shown in parts by weight are.

Menthol 60
Essential Oil «40

The essential oil is such an oil in which the menthol is soluble i.e. peppermint oil or clove oil. If the weight of the essential oil is less than 40, the balance is made by benzyl benzoate and / or benzyl alcohol, which as Diluting solution work. The essential oil is a flavor enhancer. In the finished cigarette, the encapsulated menthol is within the range of 75-200 parts per million Cigarette insert, while the essential oil with or without the Diluting solvent is within the range of 1-125 parts per million insert. The smoker cannot turn either recognize the menthol or the solvent.

Example 4

The solution from station 11 is provided by an essential oil such as for example cinnamon oil or clove oil, which are flavorings or fragrances. ■ A solvent can be added.

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Example 5

The solution from station 11 is through. Replaces dihydrocoumarin, which despite its low volatility is an unstable flavoring agent is. In this example, the concentration of the encapsulated flavoring agent in the finished cigarette is 25-150 Parts per Killion parts of cigarette insert, the smallest concentration according to the "effective threshold", which deals with the Geschaacksuiittel can change. The manufacturing process for the microcapsule slurry is otherwise identical to Example 1 in every respect.

The concentrations of the flavoring agents are in all five examples between the limits which correspond to its "effective threshold" and its "detection threshold", so that despite the effect of the flavoring agents during smoking these remain undetected by the smoker. .

Instead of being broken open by heat, the microcapsules can be burst or broken out by pressure and on the inside applied to the cigarette wrapper to prevent it from breaking by squeezing the cigarette between your fingers facilitate.

Examples of concentrations for volatile or unstable, water-insoluble flavoring agents are in the table below indicated, in each case the concentration between the "effective threshold" and the detection threshold "lies.

Flavor Concentration (parts per million )

a) menthol and '75-200 · vanillin 15-60

b) menthol and 75-200 clove oil ■ 15-60

c) clove oil 15-60

d) dihydrocoumarin 25-150 - _v

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Claims (7)

I / p 7402 -10- April 28, 72 B / We claims 1. Cigarette with a flavoring agent contained in breakable microcapsules, characterized in that the concentration of encapsulated flavoring agent with respect to the ci- Φ garette insert lies between limits that correspond to the effective and the identification threshold. 2. Cigarette according to claim 1, characterized in that the flavoring microcapsules are distributed in the insert. 3. Cigarette according to claim 1, characterized in that the Flavoring microcapsules are stored near the insert in an envelope surrounding the insert. 4. Cigarette according to claim 1, characterized in that the Flavoring microcapsules contain menthol. 5. Cigarette according to claim 1, characterized in that the Flavoring agent microcapsules contain menthol and a flavor enhancer. 6. Cigarette according to claim 1, characterized in that the Flavoring agent in the microcapsules and its concentration consists of one of the following examples. Flavor concentration ('files per million ) a) menthol 75-200 b) menthol and 75-200 vanillin 15-60 c) menthol and 75-200 clove oil 15-60 d) clove oil 15-60 e) dihydrocoumarin 25-150 209852/0593 Ι / ρ 7402 -11- April 28, 72 B / We 7. cigarette according to claim 1, characterized in that the At least the main insert consists of tobacco. 209852/0593