smoking article with liquid supply material and filter comprising an extended release aroma supply m

专利摘要:
SMOKING ITEM WITH LIQUID SUPPLY MATERIAL. The present invention relates to a smoking article (10) incorporates a liquid supply prolonged release material (20), the liquid supply material comprising a closed matrix structure that defines a plurality of domains. The liquid composition is contained within the domains and can be released from the closed matrix structure upon compression of the material. The liquid supply material (20) provides a prolonged release of the liquid composition over a force range of at least 5 Newtons. Preferably, the liquid supply material is provided inside the filter (14) of the smoking article (10).
公开号:BR112014010756B1
申请号:R112014010756-4
申请日:2012-11-02
公开日:2020-12-01
发明作者:Clement Besso
申请人:Philip Morris Products S.A；
IPC主号:

专利说明:

[001] The present invention relates to a liquid supply material that provides a prolonged release upon compression of the material and to a smoking article that incorporates a liquid supply material.
[002] It is well known to incorporate flavoring additives into smoking articles for the purpose of providing additional aromas to the consumer during smoking. Flavorings can be used to increase tobacco flavors produced when heating or burning the tobacco material within the smoking article, or to provide non-tobacco flavors such as mint or menthol.
[003] Flavoring additives used in smoking articles, such as menthol, are commonly in the form of a liquid flavoring that is incorporated into the filter or tobacco rod of the smoking article and will therefore have a tendency to migrate or evaporate from the smoking article during storage. The amount of flavoring available to flavor the main stream of smoke during smoking is therefore reduced.
[004] It was previously proposed to reduce the loss of volatile flavorings from smoking articles during storage through flavoring encapsulation, for example, in the form of a capsule or a microcapsule. The encapsulated flavoring can be released before or during the smoking of the smoking article by breaking the encapsulated structure, for example, by crushing or melting the structure. When these capsules are crushed to release the flavoring, the capsules open by breaking down at a specific strength and release the flavoring photo at that strength. That is, the aroma is released from the capsules at a specific strength, but the aroma is not released before or after the specific strength. Capsules and micro capsules for this reason cannot provide a prolonged release during a force range.
[005] It is also known to incorporate other types of non-flavoring liquid additives into smoking articles in order to adapt the smoke in some way during smoking. For example, certain liquid additives can be provided within a filter of a smoking article to change the filtering properties of the filter during smoking.
[006] It would be desirable to provide a new material and mechanism for the supply of a liquid additive in an aerosol generating device. Specifically, it would be desirable to provide such a material and mechanism for supplying an aroma in a smoking article that provides greater flexibility and control over the release of the aroma during smoking. It would be specifically desirable to provide such a material that can provide a more selective release of aroma during smoking. It would also be desirable to provide a liquid supply material for a smoking article that exhibits improved stability and retention of liquid additives during storage.
[007] According to the invention an aerosol generating device is provided which incorporates a sustained release liquid supply material, the liquid supply material which comprises a closed matrix structure which defines a plurality of domains. The liquid composition is contained within the domains and can be released from the closed structure matrix upon compression of the material. The liquid supply material provides a prolonged release of the liquid composition, by compressing the material over a force range of at least 5 Newtons.
[008] According to the invention there is also provided a smoking article which incorporates an extended release aroma supply material, the aroma supply material comprising a closed matrix structure that defines a plurality of domains. A flavoring composition is contained within the domains and can be released from the closed matrix structure upon compression of the material. The aroma supply material provides a prolonged release of the aroma composition when compressing the material over a force range of at least 5 Newtons.
[009] According to the invention there is also provided a supply material comprising a closed matrix structure that defines a plurality of domains. An aroma composition is contained within the domains and can be released from the closed matrix structure upon compression of the material. The aroma supply material provides a prolonged release of the aroma composition upon compression of the material over a force range of at least 5 Newtons.
[0010] In the description that follows, any references to the characteristics or properties of the sustained release liquid supply material or aroma release material according to the invention also apply to the liquid supply material or aroma supply material. flavor of filters or smoking articles according to the invention, unless otherwise indicated.
[0011] In the form used here, in this patent application, the term "aerosol generating device" is used to describe any consumer device that generates an aerosol from a substrate during use and supplies the aerosol to a consumer. In certain preferred embodiments, the aerosol generating device is a type of smoking article. In other embodiments, the aerosol generating device is a type of inhalation device.
[0012] Smoking articles according to the present invention that incorporate the liquid supply material of prolonged release can take the form of filter cigarettes or other smoking articles, in which the tobacco material is burned to form smoke. The present invention further encompasses articles for smoking, in which the tobacco material is heated to form an aerosol, instead of being burned, and articles for smoking in which an aerosol containing nicotine, is generated from a material tobacco, tobacco extract or other source of nicotine, without combustion or heating. The smoking articles according to the invention can be assembled smoking articles, whole or components of smoking devices, which are combined with one or more other components, for the purpose of providing an assembled device for the production of an aerosol , such as, for example, the consumable part of a heated smoking device.
[0013] In the form used here, in this patent application, the term "smoke" is used to describe the smoke produced by combustible smoking articles such as filter cigarettes and aerosols produced by non-combustible smoking articles, such as articles for smoking smoking heated or unheated of the types described above.
[0014] In the description that follows, the invention will be described with reference to a smoking article that incorporates a liquid supply material that provides a liquid supply material that provides for prolonged release of a liquid composition. However, the teaching can also be applied to an alternative aerosol generating device for the prolonged release of a liquid composition.
[0015] In the form used here, in this patent application, the term "liquid" refers to compositions that are in a liquid state at room temperature (22 ° C)
[0016] The term "liquid composition" refers to any liquid agent that can be incorporated into a component of an aerosol generating device for the purpose of providing an effect on the aerosol or smoke generated during smoking. The liquid composition can be, for example, a substance that is capable of reducing one or more constituents of the aerosol. Alternatively, the liquid composition can be a substance that is capable of reacting with one or more other substances in the aerosol generating device for the production of an aerosol. In preferred modes of the invention, the liquid composition is a liquid aroma composition and the liquid supply material is adapted to provide a weapon in a smoking article or a part of a smoking article.
[0017] In the description that follows, the invention will be described with reference to an aroma supply material that provides an extended release of an aroma composition. However, the teaching can also be applied to a material for the prolonged release of an alternative liquid composition.
[0018] The term "extended release" is used to indicate that the aroma supply material is capable of releasing the aroma composition during a range of applied compressive strength, over a range of material deformation or both. For example, the release of the aroma composition as a function of the applied compression force is measured, it will be observed that the material is able to release the aroma composition in a force of x Newtons and will continue to release the aroma composition as the force is increased from x Newtons to (x + y) Newtons (for example, where y is 5 Newtons).
[0019] Due to the fact that there are bands, the bands of force and deformation described here, in this patent application, have an amplitude and they extend between the ends of the band. For example, using the generic example above in which y is 5 Newtons, the force range could have an amplitude of 5 Newtons and could extend from x Newtons to (x + 5) Newtons.
[0020] Since increasing the compressive strength over the force range will release more aroma composition from the aroma release material, the term "extended release" can also be described as "progressive release". This is in contrast to the aroma release mechanisms of the prior art with respect to smoking products, in which the aroma is released with a specific strength, but the flavor is not released before or after the specific strength.
[0021] Those skilled in the art will understand that the term "extended release" covers those modalities in which the amount of aroma composition released in a given force depends on the duration of the applied force. For example, in some embodiments, two quick applications of a given strength can release the same amount of aroma composition with a single prolonged application of the given strength. In these modalities, it is possible to use the properties of prolonged release of the material to provide multiple "doses" of the aroma composition through repeated application of the same form or similar strength to the material without aroma supply. In addition, multiple applications of progressively higher forces can also be used, which in some cases can increase the amount of aroma in the multiple "doses" that are released. Examples of these different types of extended release are provided below.
[0022] As described below, when the aroma supply material is in a location within the smoking article, a compressive force is exerted on the material by applying a compressive force to the part of the smoking article that incorporates the material. However, unless stated otherwise, in the description that follows, the properties and parameters of the material are defined with respect to the material itself, except with respect to the smoking article. For example, references to the applied compression force and deformation relate to the compression or direct deformation of the material when it is outside a smoking article. In most cases, the material can be tested by cutting or otherwise removing the material from the smoking article and testing the material directly.
[0023] Within the range of the compression or deformation force, the amount of the aroma composition that is released from the material is dependent on the applied compression or deformation force. There may be a substantially continuous relationship between the compression or deformation force and the amount of aroma composition released. In that case, the amount of the aroma composition released will increase substantially and continuously as the applied compression force or material deformation increases. Alternatively, the aroma composition can be released in separate quantities at certain forces within the defined range of compression or deformation force, for example, with some matrix materials described below. In that case, the amount of aroma composition released will increase in a step-by-step manner as the form of compression or deformation increases.
[0024] The extended release aroma release profile provided by the aroma release material in smoking articles of the present invention is in contrast to the aroma release profile of a capsule. The capsules are typically manufactured in such a way that the outer shell of the capsule will break at a defined specific compressive force. At that specific strength, the outer shell will be crushed and substantially all of the flavoring contained in the core of the capsule will be released at the same time. However, at forces applied below that specific force, substantially no aroma will be released.
[0025] With respect to the present invention, the aroma composition is considered to be "released" from within the aroma supply material when the aroma composition is exposed to the environment outside the aroma supply material. The aroma composition is considered to be "released" if it has been emitted from the aroma supply material into the surrounding space or material within the smoking article. In addition, the aroma composition is considered to be "released" if it is within the aroma supply material and one or more passageways for flavorings within the surrounding environment are provided. For example, an aroma composition within an open cell structure such as a sponge is considered to be "released".
[0026] The smoking articles of the present invention incorporate a new type of aroma supply material that provides a prolonged release of an aroma composition when compressing the material with a compressive force over a range of forces. The aroma composition is substantially retained within the aroma supply material structure and is released when the material is compressed, for example, by crushing or pressing. The aroma supply material is therefore advantageously capable of providing aroma when required and acts as a type of aroma "pump" within the smoking article.
[0027] As described above, the aroma supply material provides an extended release profile, such that the amount of aroma composition released upon compression can be controlled by adjusting the compression force applied by the consumer, for example , over a range of at least 5 Newtons. This provides greater flexibility in the amount of aroma composition that can be released and for that reason greater control over the intensity of aroma that is provided during smoking.
[0028] The extended release profile of the aroma supply material furthermore means that the aroma composition is released more than once from the material. Applying a compressive force over a range of at least 5 Newtons can release only a part of the available aroma composition from the material, so that the rest of the aroma composition remains within the material for subsequent release. This characteristic of the aroma supply material provides the consumer with a high level of control over the timing of the aroma supply during smoking as well as the intensity of the aroma. The consumer can choose to release the aroma composition only once during smoking, for example, just before the final puff. Alternatively, the consumer can choose to release two or more puffs of the aroma composition on different occasions during smoking.
[0029] The stable retention of the aroma composition within the structure of the aroma supply material until compression ensures that c = advantageous that the loss of the aroma composition from the aroma supply material during the storage of a smoking article that incorporates the material can be minimized. This is specifically advantageous when the aroma composition contains a volatile material that can otherwise vaporize during storage.
[0030] As a result of the improved retention of the aroma composition within the aroma supply material, it is not necessary to add extra flavoring to compensate for the loss of flavoring during storage. In some cases, this allows a lesser amount of flavoring to be used, while at the same time providing a similar supply of flavoring.
[0031] In addition, improved retention of the aroma composition within the aroma supply material ensures that the aroma composition does not come into contact with other components of the smoking article prior to smoking. The aroma supply material of the present invention is therefore specifically desirable for use in smoking articles that incorporate an absorbent in a filter, such as activated carbon, active aluminum, zeolites, sepiolites, molecular sieves and silica gel.
[0032] The present invention further provides an article for smoking which incorporates an aroma supply material comprising an aroma composition that can be released upon compression of the material in a deformation range of at least 25 percent deformation. That is, the strain range has an amplitude of at least 25 percent strain. The deformation of the material will typically increase with increasing compressive strength. The percentage of material deformation corresponds to the reduction of the material dimension when applying a compressive force in the direction in which the compressive force is applied. The aroma supply material is able to release the aroma composition over a deformation range.
[0033] As described above with respect to the prolonged release of the aroma composition over a range of forces, the amount of aroma composition released can increase substantially and continues with the increase in deformation of the material over the defined range. Alternatively, the amount of the aroma composition released may increase in a stepwise manner over the defined deformation range.
[0034] The aroma supply material the smoking articles of the present invention will have a characteristic aroma release profile. The "aroma release profile" of the aroma release material refers to the way in which the release of the aroma composition from the aroma release material varies as a function of the applied compression force, or the deformation of the material.
[0035] Preferably, the aroma release material provides a prolonged release of the aroma composition when compressing the material over a force range of at least about 8 Newtons, preferably at least about 10 Newtons, most preferably at least about 20 Newtons.
[0036] Preferably, the aroma supply material provides a prolonged release of the aroma composition when compressing the material over a force range from about 10 Newtons to about 15 Newtons. That is, the force range preferably extends from 10 Newtons to about 15 Newtons.
[0037] Preferably, the aroma supply material provides an extended release of the aroma composition over a wider range of strength from 5 Newtons to about 50 Newtons. This can also be described as a range that extends from about 5 Newtons to about 50 Newtons. Most preferably, the aroma supply material provides a prolonged release of the aroma composition over a force range from about 5 Newtons to about 25 Newtons, more preferably from about 5 Newtons to about 20 Newtons.
[0038] Preferably, the amount of the aroma composition released by compression of the aroma supply material with a force of about 5 Newtons corresponds to at least about 2 weight percent and preferably at least at least about 4 weight percent of the aroma supply material, before any compression. Preferably, the additional amount of aroma composition that is released upon further compression of the aroma release material with a force of about 10 Newtons (up to a total of 15 Newtons) corresponds to at least 10 percent, in weight, from the aroma supply material to the material before any compression.
[0039] Preferably, the amount of the aroma composition released, when compressing the aroma supply material with a force of about 10 Newtons, corresponds to at least about 15 weight percent and more preferably at least about 20 weight percent of the aroma supply material, before any compression. Preferably, the additional amount of aroma composition that is released when further compressing the aroma supply material with a force of about 15 Newtons (up to a total of 25 Newtons) corresponds to at least 10 percent, weight of the aroma supply material before any compression.
[0040] Preferably, the aroma supply material provides a prolonged release of the aroma composition when compressing the material over a deformation range of at least about 25 percent, more preferably at least about 30 percent cent. Preferably, the aroma supply material provides a prolonged release of the aroma composition when the material is compressed over a range of strain from about 10 percent strain to about 40 percent strain, more preferably over a range of strain from about 10 percent strain to about 50 percent strain.
[0041] Preferably, the amount of the aroma composition released upon deformation of the aroma supply material to about 10 percent corresponds to at least about 2 percent by weight, and most preferably at least at least about 4 weight percent of the aroma supply material before any compression. Preferably, the additional amount of aroma composition that is released after further deformation of the aroma supply material to about 40 percent corresponds to at least 10 percent by weight of the aroma supply material, before any compression.
[0042] Preferably, the amount of the aroma composition released upon deformation of the aroma supply material to about 25 percent corresponds to at least about 5 percent by weight, and most preferably at least about 8 percent by weight of the aroma supply material before any compression. Preferably, the additional amount of the aroma composition that is released after further deformation of the aroma supply material to about 40 percent corresponds to at least 10 percent by weight of the aroma supply material, before any compression.
[0043] It is assumed that most, if not all, of the weight loss exhibited upon compression or deformation of the aroma supply material is as a result of the release of the aroma composition from the material. The amount of aroma composition released from the material can therefore be determined by measuring the difference in weight of the aroma supply material before and after compression and calculating the percentage reduction in the total weight of the aroma supply material . As defined above, weight loss is calculated with reference to the starting weight of the aroma supply material before any compression. A suitable method for evaluating the release of the aroma composition from the aroma supply material when applying a compressive or deformation force is shown in the examples described below.
[0044] In certain embodiments, the aroma supply material of the smoking articles of the present invention may passively release a low level of the aroma composition over time in the absence of the application of a compressive force. For example, during the production of the aroma supply material, a small amount of the aroma composition may not be effectively retained within the aroma supply material and may therefore remain on the surfaces of the material. This small amount of residual aroma composition is therefore immediately available for contact with smoke. In this way, a low base level of aroma can be provided during the act and smoking even without the compression of the aroma supply material for the release of the aroma composition. When compressing the aroma supply material, the same aroma is maintained but with an increased intensity.
[0045] Alternatively, or in addition, the smoking articles of the present invention can be provided with an additional flavor source that passively releases a low level of flavoring into the smoke, regardless of the flavor supply material. The additional aroma source can release the same aroma as that of the aroma supply material, or a different flavor. Suitable additional sources of aroma include, for example, an aroma filament or aroma cellulosic beads impregnated with a liquid flavor.
[0046] Those modalities in which the flavoring is available for the smoke before the compression of the aroma supply material provide a "taste for taste" profile. In these smoking articles there is a transition in the intensity or character of the aroma, or both, when compressing the aroma supply material.
[0047] In alternative embodiments, the smoking articles according to the invention can provide a "non-aroma to aroma" profile. This means that there is substantially no additional aroma supply within the main stream of smoke until the aroma supply material is compressed to release the aroma composition. For this reason, no additional flavorings are incorporated into the filter of the smoking article.
[0048] The aroma supply material of the smoking articles of the present invention retains the aroma composition within the material structure until a compressive force is applied to the material. To achieve this retention of the aroma composition, the aroma supply material comprises a closed matrix or a mesh structure, which secures the aroma composition within the closed structure. That is, the aroma composition is trapped in domains within the matrix structure. When the material is compressed, the aroma composition is forced out of the matrix structure, for example, by breaking the surrounding structure.
[0049] In preferred embodiments of the present invention, the aroma supply material comprises a polymer matrix comprising one or more matrix forming polymers. In specific preference embodiments, the polymer matrix forms the plurality of domains that include the aroma composition.
[0050] In such embodiments, the aroma supply material includes a three-dimensional structural matrix of a polymer material that forms a network that defines a plurality of domains. The term "domain" is used throughout the present specification to refer to closed pores or pouches that contain the aroma composition or separate regions or, in certain manufacturing processes of matrix materials, droplets of the flavor composition that are dispersed within the precursor materials of the polymer matrix, as further described below. The aroma composition is dispersed through the polymer matrix through a plurality of separate domains that are surrounded and surrounded by the polymer matrix.
[0051] The polymer matrix of the isolates from the aroma supply material isolates the aroma composition in such a way that the flavoring is substantially retained within the polymer matrix structure until the material in the aroma supply is compressed. . The compression of the aroma supply material results in deformation of the polymer matrix. As the level of applied force or deformation or both the force and deformation increase, the matrix is gradually broken and the domains begin to break, and such that the flavor composition retained within the domains is released.
[0052] The gradual degradation of the polymer matrix with the increase of the compression force provides the aroma supply profile of the prolonged aroma release material. For example, within a force range of at least 5 Newtons, the domains within the aroma supply material continue to be disrupted as the compression form increases, such that the aroma composition is released through the track. At a determinable level of applied force, most domains will be disrupted and an increase in compressive strength above that level will no longer result in the additional release of the aroma composition.
[0053] According to the definition established above, the flavor composition is considered to be "released" when the structure of the domain containing the aroma composition is broken in such a way that the somonium is opened to the surrounding environment. As described above, some of the "released" aroma composition can immediately escape from the aroma supply material as a result of the applied compression force. In addition, some of the "released" aroma composition may initially remain within the domain space but gradually migrates out of the domain through any openings in the domain structure.
[0054] Typically, when the aroma supply material is in place inside the smoking article, compression of the material by the consumer will only initially result in the rupture of a part of the domains. The rest of the domains for that reason remain closed with the aroma composition trapped inside until an additional compressive force is applied. The domain structure is therefore specifically well adapted to provide an aroma supply material for multiple releases of aroma during smoking.
[0055] In specific preference embodiments, the polymer matrix of the aroma supply material comprises a plasticizer in addition to the one or more matrix forming polymers.
[0056] The term "plasticizer" refers to a substance or material incorporated in the matrix-forming material to increase its flexibility or operating condition. Many plasticizers tend to decrease inter-molecular forces between the polymer chains, which results in increased flexibility and compressive capacity, or they can exert a plasticization effect because they cause discontinuities in the polymer matrix. . Examples of plasticizer classes are saccharides (mono-, di- or oligosaccharides) alcohols, polyols, acid salts, lipids and derivatives (such as fatty acids, mono glycerides, esters, phospholipids) and surfactants. Specific examples of suitable plasticizers include but are not limited to glucose, fructose, honey, sorbitol, polyethylene glycol, glycerol, propylene glycol, lactitol, sodium lactate, hydrolyzed hydrated starches, trehalose or combinations thereof. Other plasticizers suitable for use in the present invention can be identified by the person skilled in the art based on the examples provided.
[0057] In the aroma supply material of the smoking articles of the present invention. The plasticizer can be incorporated into the polymer matrix in order to soften the matrix in such a way that the material can be more compressible. This allows the aroma supply material to more effectively provide the extended aroma release profile as described above. Specifically, the plasticizer can increase the force range over which a prolonged release of the aroma composition can be provided or decrease the amount of force necessary to initiate the release of the aroma composition.
[0058] Preferably, the plasticizer is incorporated into the polymer matrix in an amount that corresponds to at least 5 percent by weight of the matrix-forming polymers, more preferably at least 10 percent of the matrix-forming polymers matrix. The ratio of the plasticizer to that of the matrix forming polymers in the polymer matrix is preferably at least 1:20, and more preferably at least 1:10. In addition, or in the alternative, the ratio is preferably less than about 1: 2.
[0059] The polymer matrix can comprise at least about 0.1 weight percent of the plasticizer based on the combined total weight of the matrix forming polymers and the plasticizer. Alternatively or in addition, the polymer matrix may comprise less than about 25 weight percent, preferably less than about 20 weight percent and more preferably less than 18 weight percent of the plasticizer based on combined total weight of matrix-forming polymers and plasticizer. Preferably the polymer matrix comprises between about 0.1 percent and about 25 percent by weight, more preferably between about 0.1 percent and about 20 percent by weight and most preferably between about 0.1 percent and about 18 percent by weight of the plasticizer, based on the total weight of the matrix-forming polymers and plasticizer.
[0060] The polymer matrix can comprise at least about 75 weight percent, more preferably at least about 89 weight percent and most preferably about 82 weight percent of the matrix forming polymers based in the combined total weight of the matrix-forming polymers and plasticizer. Alternatively, in addition, the polymer matrix can comprise less than about 99.9 weight percent of the matrix forming polymers, based on the combined total weight of the matrix forming polymers and the plasticizer. Preferably, the polymer matrix can comprise between about 75 percent and about 99m9 weight percent, more preferably between about 80 percent and about 99m9 weight percent and most preferably between about 82 percent one hundred and about 99.9 percent by weight of matrix-forming polymers, based on the combined total weight of matrix-forming polymers and plasticizer.
[0061] The polymer matrix is preferably a cross-linked polymer matrix. The crosslinking of the one or more polymers that form the matrix provides structural strength and stability that increases the resistance of the polymer matrix to heat and the shear forces to which the material can be subjected during manufacture or processing of the article to smoking incorporating the material. The matrix structure also provides effective retention of the aroma composition with the aroma supply material. Preferably, the cross-linked polymer matrix is resistant to water or moisture. The polymer matrix can be formed from a single type of crosslinkable polymer or a combination of crosslinkable polymers.
[0062] Preferably, the polymer matrix comprises one or more polysaccharides. Polysaccharides are specifically suitable for use in the present invention, since they can be made insoluble in water and heat-stable through cross-linking, and are tasteless. Preferably, the polymer matrix comprises a combination of two or polysaccharides, wherein the two or more polysaccharides are capable of cross-linking with each other. In some embodiments, the polymer matrix comprises alginate and pectin, where the alginate and pectin are cross-linked with each other. In some embodiments, the polymer matrix comprises at least 20 weight percent pectin. In addition, the polymer matrix can have at least about 60 weight percent alginate. Preferably, the polymer matrix has between about 20 weight percent and about 40 weight percent pectin and between about 60 weight percent and about 80 weight percent alginate. Preferably, the ratio of alginate to pectin is about 2: 1 or between about 1.8: 1 and about 2.2: 1.
[0063] The crosslinking of the polymer matrix is preferably achieved by reacting the polymers with multivalent cations that form the salt bridges for the crosslinking of the polymers. The various multivalents are preferably provided in the form of a solution of a multivalent metal salt, such as a solution of metal chloride. Multivalent cations preferably include calcium, iron, aluminum, manganese, copper, zinc and tantalum. A specific salt of preference is calcium chloride.
[0064] The composition and aroma of the aroma supply material incorporated within the smoking articles of the present invention preferably includes a flavoring mixed with one or more fats. It is preferably specified that one or more fats are liquid at room temperature ( 22 ° C) or that have a melting point below 22 ° C. For the purposes of the present invention, the "melting point" of a fat is measured using differential scanning calorimetry (DSC).
[0065] The one or more liquid fats act as vehicles for the flavoring and can be referred to as an "excipient". The flavoring is combined with the excipient to form the aroma composition. In certain embodiments, the flavoring is dispersed or dissolved in the excipient.
[0066] The use of an excipient for the flavoring that is liquid at room temperature is specifically advantageous, since the flavoring composition can be released more easily from the flavor supply material upon compression. In addition, with a liquid excipient, flavorings will be more typically available to the surrounding environment after the composition and aroma are released from the material. This is due to volatile aroma compounds that can be released more easily from liquid vehicles than from solid vehicles.
[0067] Furthermore, the use of a liquid excipient advantageously improves the dispersion of the aroma composition within the filter material, after the aroma composition has been released from the aroma supply material. For example, when the filter is formed of a fibrous filter material, the aroma composition will spread more easily through the fibers such that a larger surface area of the filter material is covered by the aroma composition. This in turn improves the level of contact between the smoke and the aroma composition as the smoke is pulled through the filter in such a way that the transfer of the flavoring into the smoke is increased. Preferably, the one or more liquid fats in the aroma composition have a neutral odor and taste. For this reason, fats have a minimal impact on the aroma provided by the flavoring mixed with the fats.
[0068] Preferably, the liquid fat in the flavor composition includes at least about 30 weight percent, preferably at least 50 weight percent, more preferably at least about 75 weight percent, and most preferably about 100 weight percent triglycerides having one or more carbohydrate acids with a chain length between 6 and 12. Alternatively, the liquid fat includes at least about 30 weight percent, preferably at least 50 percent by weight, more preferably at least about 75 percent by weight and most preferably about 100 percent by weight of triglycerides having all three carboxylic acids with chain lengths between 6 and 12.
[0069] Preferably, the liquid fat in the flavor composition includes at least about 30 weight percent, preferably at least about 50 weight percent, more preferably at least about 75 weight percent and most preferably about 100 weight percent triglycerides having one or more carboxylic acids with a chain length between 8 and 10. Alternatively, the liquid fat includes at least about 30 weight percent, preferably at least, about 50 weight percent, more preferably at least about 75 weight percent and most preferably about 100 weight percent triglycerides having all three carboxylic acids with chain lengths between 8 and 10 .
[0070] A triglyceride is an ester derived from glycerol and three fatty acids or carboxylic acids. The "chain length" of a carboxylic acid in a triglyceride refers to the number of carbon atoms in the main structure of the carboxylic acid. For example, a chain length 12 of a carboxylic acid is formed by glycerol and a fatty acid that has 12 carbon atoms in the main structure of the aliphatic tail of the fatty acid. Triglycerides that have one or more carboxylic acid chain lengths between 6 and 12 are typically referred to as medium chain triglycerides (MCTs).
[0071] Medium chain triglycerides are specifically suitable for use in the aroma supply material of the smoking articles of the present invention, since they are in a stable liquid state at room temperature (22 ° C). In addition, MCTs provide a neutral odor and taste, which will have a negligible effect on the aroma provided by the flavor composition during smoking. In addition, at a chain length of between 6 and 12, it is advantageously found to be a transfer of a minimum of fat components into the smoke.
[0072] In specific preferred embodiments of the invention, the aroma composition comprises a flavoring mixed with TCM oil, for example, capric / caprylic triglyceride from fractionated coconut oil. An example of a suitable MTC oil is MILYOL® 810 commercially available.
[0073] The one or more triglycerides can be provided as with individual components, or can be provided in a material that includes one or more medium chain triglycerides in combination with other components.
[0074] The carboxylic acid chains of the medium chain triglycerides of the aroma composition can be saturated in such a way that all bonds between the carbon atoms in the chain are single bonds, or at least partially are saturated in such a way that the chain include at least one double or triple bond between two carbon atoms in the chain. Preferably there are more saturated chains in the triglyceride compounds than unsaturated chains. In some cases, the ratio of saturated to unsaturated chains is at least about 1.6, more preferably at least about 1.8, and most preferably at least 2.0. The greater relative amount of saturated chains can make the product more stable over time, in some cases increasing the potential for the product to remain in storage.
[0075] Flavor compositions may include a combination of two or more triglycerides that have different chain lengths. For example, the aroma composition may comprise an oil or a fat that includes a mixture of medium chain triglycerides, optionally in combination with other short chain ones (for example, triglycerides in which all chain lengths are less than than 6) or long chain triglycerides (for example, triglycerides in which all chain lengths are longer than 12). The oil or fat that includes triglycerides can be vegetable, animal or artificially produced.
[0076] The flavor of the flavor composition includes one or more flavor compounds to provide the desired flavor when heating the flavor supply material. Flavorings suitable for use in the aroma supply material of the present invention will be well known to the person skilled in the art. Preferably, the flavoring is soluble in the excipient at room temperature, such that the flavor composition is a liquid. The flavoring may include one or more natural flavorings, or one or more synthetic flavorings or a combination of natural and synthetic flavorings.
[0077] A variety of flavors can be used in the aroma supply material of the smoking articles of the present invention. In some embodiments, the flavoring is a high potency flavoring, and is typically used at levels that may result in less than 200 parts per million in smoke. Examples of such flavorings are key tobacco flavor compounds such as beta-damascenone, 2-ethyl-3,5-dimethylpyrazine, phenyl acetaldehyde, guaiacol and furanyl.
[0078] In modalities in which the flavoring consists of one or more high potency flavorings and it is desired that the flavoring is released at a low level in the smoke as described above, any of the high potency flavorings mentioned above can be added aroma composition at a level of at least about 1 part per million. Alternatively or in addition, high potency flavorings are added to the flavor compositions at a level of less than about 375 parts per million, preferably less than about 325 parts per million, more preferably less than about 325 parts per million. Preferably, high potency flavorings are added to the flavor compositions at a level between about one part per million to about 375 parts per million, more preferably between about 1 part per million to about 325 parts per million. million and most preferably between about 1 part per million to about 275 parts per million.
[0079] In those embodiments in which the flavoring consists of one or more high potency flavorings, the remainder of the flavor composition preferably consists of the excipient comprising one or more liquid fats.
[0080] Other flavorings can only be felt by humans at higher levels of concentration. These flavorings, which are referred to here in this patent application, as low potency flavorings are typically used at levels that result in orders of magnitude quantities of higher amounts of flavorings being released into the smoke. Suitable low-power flavorings include, but are not limited to, natural or synthetic menthol, peppermint, mint, coffee, tea, spices (such as cinnamon, cloves and ginger), cocoa, vanilla, fruit flavors, chocolate, eucalyptus, geranium, eugenol, agave, juniper, anethole and linalool.
[0081] If desired, one or more of the high potency flavorings mentioned above can be used in combination with one or more low potency compounds, for example, in the amounts described above.
[0082] Preferably, the flavoring includes an essential oil or a mixture of one or more essential oils. An "essential oil" is an oil that has a characteristic odor and taste of the plant from which it is obtained. Essential oils suitable for inclusion in the aroma granules of the present invention include, but are not limited to peppermint oil or peppermint oil.
[0083] In preferred embodiments of the invention, the flavoring comprises menthol, eugenol or a combination of menthol and eugenol. These types of scents are commonly used to provide a refreshing aroma to the smoke of a smoking article. In a preferred embodiment of the invention, the aroma composition comprises menthol dispersed in MCT oil.
[0084] In embodiments in which the aroma composition with one or more low potency flavorings, the aroma composition may comprise at least about 15 weight percent, preferably at least about 20 percent, in weight, and more preferably at least about 25 weight percent of low-power flavorings. Alternatively or in addition, the aroma composition may comprise less than about 50 weight percent, more preferably less than about 40 weight percent and more preferably less than about 35 weight percent , low-power flavorings. Preferably, the flavor composition comprises between about 15 percent and about 50 percent by weight, more preferably between about 20 percent and about 40 percent by weight, and most preferably between about 25 percent and about 35 percent, by weight, of low potency flavorings.
[0085] In such embodiments comprising one or more low potency flavorings, the aroma composition may comprise at least about 50 weight percent, more preferably at least about 60 weight percent, and more preferably at least about 65 weight percent of the excipient comprising one or more liquid fats. Alternatively or in addition, the flavor composition may comprise less than about 85 weight percent, more preferably less than about 80 weight percent and most preferably less than about 75 weight percent of the excipient. Preferably, the flavor composition comprises between about 50 percent and about 85 percent by weight, more preferably between about 60 percent and about 80 percent by weight, and most preferably between about 65 percent and about 75 percent by weight.
[0086] When the flavoring is a low potency flavoring such as menthol, the flavor supply material may comprise at least about 12 weight percent, preferably at least about 15 weight percent , and most preferably at least about 20 weight percent of any or more of the low potency flavorings described herein in this patent application. Alternatively or in addition, the aroma supply material may comprise less than about 40 weight percent, preferably less than about 35 weight percent and more preferably less than about 30 weight percent. weight, of any one or more of the low potency flavorings described herein, in this patent application. Preferably, the aroma supply material comprises between about 12 weight percent and about 40 weight percent of low potency flavoring, more preferably between about 15 weight percent and about 35 weight percent. percent by weight of low potency flavoring, or more preferably between about 20 percent by weight and about 30 percent by weight of low potency flavoring. In specific preference embodiments, the low potency flavoring comprises menthol.
[0087] When the flavoring is a low potency flavoring, the flavor supply material also comprises at least about 40 weight percent, and preferably less than 50 weight percent of any one or more of the liquid fats described here, in this patent application. Alternatively or in addition, the aroma supply material comprises less than about 70 weight percent, preferably less than about 65 weight percent and more preferably less than about 60 weight percent, of any one or more of the liquid fats described here, in this patent application. Preferably, the aroma supply material comprises between about 40 percent and about 70 percent by weight, more preferably between about 50 percent and about 65 percent by weight, and most preferably between about 50 percent and about 60 percent, by weight, of any one or more of the liquid fats described herein, in this patent application.
[0088] When the flavoring is a low potency flavoring, the flavor supply material may comprise at least about 8 weight percent, and preferably at least about 10 weight percent of the matrix materials. polymer described here, in this patent application. Alternatively or in addition, the aroma supply material may comprise less than about 20 weight percent, preferably less than about 18 weight percent and more preferably less than about 16 weight percent of the polymer matrix materials described here, in this patent application. Preferably, the aroma supply material comprises between about 8 percent and about 20 percent by weight, more preferably between about 10 percent and about 18 percent by weight, and most preferably between about 10 percent and about 16 percent, by weight, of any one or more of the polymer matrix materials described herein, in this patent application.
[0089] When the flavoring is a low potency flavoring, the flavor supply material preferably comprises at least about 0.1 percent plasticizer. Alternatively or in addition, the aroma supply material may comprise less than about 5 weight percent, preferably less than about 3 weight percent and more preferably less than about 2 weight percent of plasticizer. Preferably, the aroma supply material comprises between about 0.1 percent to about 5 percent by weight, more preferably between about 0.1 percent to about 3 percent by weight, and most preferably -rate from about 0.1 weight percent to about 2 weight percent of any one or more polymer matrix materials described herein, in this patent application.
[0090] When the flavoring is a high potency flavoring such as those described above, the flavor supply material may comprise more than 1 part per million flavoring. Alternatively or in addition, the flavor supply material may comprise less than 300 parts per million flavor, preferably less than about 260 parts per million and more preferably less than about 220 parts per million flavor. Preferably, the aroma supply material comprises between about 1 part per million and about 300 parts per million, more preferably between about 1 part per million and about 260 parts per million and most preferably between about 1 part per million and about 220 parts per million flavoring.
[0091] When the flavoring is a high potency flavoring, the remainder of the aroma supply material, including everything other than the high potency flavoring, may comprise at least about 50 weight percent, preferably at least about 60 weight percent and more preferably at least 75 weight percent of any one or more of the liquid fats described herein, in this patent application. Alternatively or in addition, the remainder of the aroma supply material comprises less than about 80 weight percent of any one or more of the liquid fats described herein in this patent application. More preferably, the remainder of the aroma supply material comprises between about 50 percent and about 80 percent by weight, more preferably between about 60 percent and about 80 percent and most preferably between about 75 percent and about 80 percent by weight of any one or more of the liquid fats described here in this patent application. In addition, when the flavoring is a high potency flavoring, the rest of the aroma supply material, including everything other than the high potency flavoring, can comprise at least 8 percent by weight, most preferably by minus 10 weight percent of any one or more of the polymer matrix materials described herein, in this patent application. Alternatively or in addition, the remainder of the aroma supply material may comprise less than about 20 weight percent, preferably less than about 18 weight percent, and more preferably less than about 16 weight percent. percent by weight of any one or more of the polymer matrix materials described herein, in this patent application. Preferably the rest of the aroma supply material comprises between about 8 percent and about 20 percent by weight, more preferably between about 10 percent by weight and about 18 percent by weight and bathing suits preferably between about 10 weight percent to 16 weight percent of any one or more of the polymer matrix materials described herein, in this patent application.
[0092] When the flavoring is a high potency flavoring, the flavor supply material comprises at least about 0.1 weight percent plasticizer. Alternatively or in addition, the aroma supply material may comprise less than about 5 weight percent, preferably less than about 3 weight percent and more preferably less than about 2 weight percent of the plasticizer. Preferably, the flavor supply material comprises between about 0.1 weight percent and about 5 weight percent, more preferably between about 0.1 weight percent and about 3 weight percent , and most preferably between about 0.1 weight percent and about 2 weight percent of any one or more of the polymer matrix materials described herein, in this patent application.
[0093] In some embodiments, the aroma supply material consists only of, or consists essentially of, the polymers of the polymer matrix, one or more plasticizer materials, one or more flavorings, and one or more fats, such as one or more triples medium chain glycerides. In alternative embodiments, the aroma supply material comprises one or more additional components.
[0094] The aroma supply material as described above can be advantageously incorporated into a wide variety of different types of smoking articles. For example, the aroma supply material can be incorporated into combustible smoking products, such as filter cigarettes, which feature a rod of cut tobacco or other smoking material, which is burned during the act of smoking. smoke.
[0095] Alternatively, the aroma supply material can be incorporated into heated smoking products of the type described above, in which the material is heated to form an aerosol, instead of being burned. For example, the aroma supply material can be incorporated into a heated smoking article comprising a source of combustible heat, such as that described in WO -A- 2009/022232, which comprises a source of combustible heat and a substrate of aerosol generation downstream of the fuel heat source. The aroma supply material can also be incorporated into heated smoking articles, comprising non-combustible heat sources, for example, chemical heat sources or electrical heat sources, such as electrical resistive heating elements.
[0096] Alternatively, the aroma supply material as described above can be incorporated in smoking products, in which an aerosol containing nicotine is formed from a tobacco material or other source of combustion and unheated nicotine, such as those described in WO -A-2008/121610 and WO - A-2010/107613.
[0097] The smoking articles according to the present invention can incorporate the aroma supply material in any one or more of the components of the smoking article. The component of the smoking article or part of the component incorporating the aroma supply material must be deformable, such that a compressive force can be applied to the aroma supply material by compressing the component. Preferably, the aroma supply material is incorporated into the filter or nozzle of the smoking article. The filter or nozzle can be compressed for the purpose of applying a compressive force to the aroma supply material to release the aroma composition to the surrounding filter. During the smoking of the smoking product, the flavoring from the part of the aroma composition that has been released from the aroma supply material is supplied to the smoke that passes through the filter.
[0098] The filter can be a single segment filter, formed from a single segment that incorporates the aroma supply material. Alternatively, the filter may be a multi-component filter that comprises at least one filter segment that incorporates the aroma supply material and at least one additional filter segment. A variety of suitable filter segments would be well known to the person skilled in the art which includes, but is not limited to, fibrous filter tow, cavity filter segments, tubular filter segments, and flow restriction segments. One or more of the filter segments may comprise an additional flavor material, an absorbent material, or a combination of an aroma material and a sorbent material.
[0099] For example, one or more of the filter segments may comprise an additional flavor material for the purpose of providing an "aroma to aroma" profile, as described above. In such cases, the additional flavor material typically passively releases the flavoring into the filter and that flavor is supplied to the smoke prior to compression of the aroma supply material. When compressing the aroma supply material, there is a transition in the intensity of the aroma supply, the character of the aroma or both. The additional flavor material may comprise, for example, a flavor filament impregnated with a liquid flavoring, one or more aroma cellulose granules, a sorbent material such as activated carbon having a liquid flavoring loaded in or in the sorbent, or combinations of the themselves.
[00100] In alternative embodiments in which an additional aroma material is not provided, the smoking article will typically provide a "no aroma to aroma" profile as described above. In these smoking articles, the first aroma to be released into the smoke will be that released from the aroma supply material.
[00101] In certain preferred embodiments of the invention, the aroma supply material is incorporated within a segment of a fibrous filter material, such as cellulose acetate tow. In such embodiments, one or more parts of the aroma supply material are preferably dispersed through the fibrous filtration material, during the production of the filter segment such that in the assembled filter, the aroma supply material is imbibed inside the segment. Upon compression of the filter and the aroma supply material within the filter, the aroma composition is released into the surrounding fibrous filter material. Advantageously, when the aroma composition comprises a liquid excipient, such as one or more liquid fats, the aroma composition is readily dispersed among the fibrous filter material upon release from the aroma supply material as described above. The aroma composition thereby coats the fibers of the filtering material to optimize the transfer of flavorings into the smoke.
[00102] In alternative embodiments of the invention, the aroma supply material is incorporated into a cavity in the filter. For example, the aroma supply material can be incorporated into a cavity between two filter plugs, where the cavity is defined by a filter housing surrounding the filter.
[00103] Preferably, the aroma supply material inside the filter is visible to the consumer through one or more layers of packaging material that circumscribe the filter. Adequate arrangements for the provision of a filter with visibility of the filter material would be known to the person skilled in the art.
[00104] The aroma supply material can advantageously be provided within smoking articles according to the invention, in a variety of different ways, so that there is no flexibility regarding the way in which the material can be incorporated in the smoking article. In certain embodiments, the aroma supply material is provided in the form of beads. The beads can be formed in any suitable form, but are preferably substantially cylindrical or spherical.
[00105] The width of the beads may be greater than about 1 mm, preferably greater than about 2 mm, and more preferably greater than about 3 mm. Alternatively or in addition, the width of the beads may be less than about 8 mm, preferably less than about 6 mm, and more preferably less than about 4 mm. Preferably, the width of the beads is between about 1 mm and about 8 mm, more preferably between about 2 mm and about 6 mm, even more preferably between about 3 mm and about 4 mm.
[00106] The "width" of the beads corresponds to the maximum dimension of the cross section of the bead, where the cross section refers to the cross section taken through the bead, which is in place inside a smoking article in a direction substantially perpendicular to the longitudinal axis of the smoking article. With respect to a substantially spherical bead, the bead width substantially corresponds to the bead diameter.
[00107] A single bill may be provided within the smoking article, or a plurality of bills may be provided, for example, two or more, three or more or four or more bills. When a plurality of beads are provided, the beads may be spaced between them throughout the smoking article, or they may be placed in one or more specific regions of the smoking article, for example, inside the filter. One or more beads of the aroma supply material can be inserted into the smoking articles according to the invention, using known apparatus and methods for inserting objects into filters or tobacco rods.
[00108] Alternatively, the aroma supply material can be in the form of strips or flakes, which can be distributed through the materials that form one or more of the components of the smoking article, or in one or more desired locations throughout the article to smoke.
[00109] Alternatively again, the aroma supply material can be in the form of a filament or yarn, which can be introduced into a component of the smoking article, such as the filter or nozzle. A continuous filament can be provided along the total length of one or more of the components of the smoking article during manufacture, or individual parts of the filament can be deposited at one or more desired locations along the one or more components. The filament preferably has a width of more than about 1 mm, preferably more than about 2 mm, and more preferably more than about 3 mm. Alternatively or in addition, the width of the filament may be less than about 8 mm, preferably less than about 6 mm and more preferably less than about 4 mm. Preferably, the width of the filament is between 1 mm and about 6 mm, more preferably between about 2 mm and about 6 mm, even more preferably between about 3 mm and about 4 mm.
[00110] As described above with reference to the beads, the "width" corresponds to the maximum dimension of the cross-section of the filament, where the cross-section is taken through a filament that is in place within an article for smoking in a direction substantially perpendicular to the longitudinal axis of the smoking article.
[00111] The aroma supply material can be colored, if desired, by including a dye. Preferably, a dye is incorporated within the aroma supply material for the purpose of adjusting the color of the material, such that it appears to be the color of the material in the component of the smoking article, in which the aroma supply material is incorporated. For example, if the aroma supply material is incorporated into the tobacco rod of a smoking article, the aroma supply material can be brown or green in color. For this reason, the aroma supply material has low visibility on the tobacco rod.
[00112] The smoking articles according to the invention may each include more than about 1 mg, and preferably greater than about 3 mg, of any of the flavor supply materials described herein, in this patent application. . Alternatively, or in addition, each smoking product may include less than about 20 mg, preferably less than about 12 mg, and more preferably less than about 8 mg of any of the smoking supply materials. aroma described here, in this patent application. Preferably, each smoking article includes between about 1 mg and about 20 mg, more preferably between about 1 mg and about 12 mg, and most preferably between about 3 and about 8 mg of supply material of aroma.
[00113] Preferably the total length of the smoking articles according to the present invention is between about 70 mm and about 128 mm, more preferably about 84 mm.
[00114] Preferably, the sternum diameter of the smoking articles according to the present invention is between about 5 mm and about 8.5 mm, more preferably between about 5 mm and about 7.1 mm, for thin smoking articles or between 7.1 mm and about 8.5 mm for regular smoking articles.
[00115] Preferably the total filter length of the smoking articles according to the present invention is between about 18 mm and about 36 mm, more preferably about 27 mm.
[00116] The smoking articles according to the present invention can be packed in containers, for example, in soft packaging or packaging with hinged lid, with an inner lining coated with one or more flavorings.
[00117] According to the present invention there is also provided a method for producing the aroma supply material as described above. The method comprises the steps of forming an aroma composition by dispersing any of the flavorings described above in one or more fats that are liquid at room temperature (22 ° C); mixing the aroma composition with a polymer matrix solution comprising one or more matrix forming polymers and plasticizer for forming an emulsion, and adding the emulsion to a crosslinking solution, to crosslink the polymer solution of the matrix to forming a polymer matrix that includes a plurality of domains of the aroma composition.
[00118] Preferably, the flavoring is mixed with one or more fats at room temperature (22 ° C) to form the aroma composition. Preferably, the aroma composition is then mixed with the polymer matrix solution at room temperature (22 ° C) and preferably, the mixing is carried out under high shear, for example, in a shear mixer, at a rate shear strength of 100 s-1. The mixture is not heated during this step, although the temperature of the mixture may increase as a result of the applied shear. Preferably, the temperature does not rise above about 50 ° C.
[00119] Preferably, the matrix polymer solution comprises a solution of one or more polysaccharides in water, as described above. Preferably, the polymer matrix solution contains about 5 percent or less by weight of the polysaccharides. Preferably, the matrix polymer solution contains between 3 percent and 5 percent by weight of the polysaccharides. Preferably, the polymer matrix solution additionally comprises about 1 weight percent or less of a plasticizer, as described above. Preferably, the matrix polymer solution comprises between about 0.1 percent and about 0.8 percent of the weight of a plasticizer.
[00120] Preferably the aroma composition and the polymer matrix solution are mixed to form a solution comprising between about 10 percent and about 30 percent by weight of the aroma composition, more preferably between about 15 weight percent and about 25 weight percent of the aroma composition.
[00121] The emulsion is preferably brought into contact with a cross-linking solution at a temperature of about 5 ° C to about 15 ° C. preferably the crosslinking solution is a solution of approximately 5 percent multivalent cations in water. Preferably, the crosslinking solution is a calcium salt solution, for example, a calcium chloride solution. The emulsion is preferably left in contact with the cross-linking solution for between about 10 seconds and about 120 seconds, more preferably between about 40 seconds and about 89 seconds. The length of time can be selected depending on the desired degree of crosslinking and the desired hardness of the polymer matrix.
[00122] After cross-linking, the resulting aroma supply material is removed from the cross-linking solution, for example, using a sieve or similar device. The aroma supply material is then preferably rinsed to remove the crosslinking solution from the surface and dried. Drying can be carried out using any suitable device, including, for example, a stream of hot air. Drying can optionally be carried out under vacuum.
[00123] Before the crosslinking solution is added, the aroma composition emulsion and the polymer matrix solution can be formed in a variety of formats, depending on the desired shape of the aroma supply material. For example, the emulsion can be formed in cylindrical or spherical shapes in order to produce filaments, beads or droplets of the material. This can be done with the use of an appropriate extrusion or ball forming technique.
[00124] Alternatively, the emulsion can be formed into a sheet, cut into strips or flakes, or pulled into a filament or thread.
[00125] The invention will also be described, by way of example only, with reference to the accompanying drawings, in which:
[00126] Figure 1 shows a side view of a filter cigarette according to the present invention comprising an aroma supply material on the tobacco rod; and
[00127] Figure 2 shows an electron microscope scan image of the aroma supply material used in the filter cigarette of Figure 1.
[00128] Cigarette 10 shown in Figure 1 comprises an elongated, cylindrical, rolled tobacco rod 12 attached at one end to an axially aligned, cylindrical filter 14. Filter 14 includes a single segment of cellulose acetate tow. The rolled tobacco rod 12 and the filter 14 are connected in a conventional manner by pointed paper 16, which circumscribes the entire length of the filter 14 and an adjacent part of the wrapped tobacco rod 12. For mixing ambient air with the main stream of smoke produced during the combustion of the rolled tobacco rod 12, a plurality of annular perforations 18 is provided through the tip paper 16 at a location along the filter 14.
[00129] A single aroma bead 20 formed in an extended release aroma supply material as described above is provided centrally inside the filter 14. The aroma bead 20 in a diameter around 2.5 mm. The aroma supply material in bead 20 incorporates an aroma composition comprising a menthol flavoring, which is released upon compression of the material with a force of between about 5 Newtons and about 10 Newtons. After compression. the menthol flavoring is available for release into the main stream of smoke as the smoke passes through the filter during smoking.
[00130] The amount of aroma composition released from the aroma supply material depends on the compression force applied in such a way that the intensity of the aroma can be controlled by controlling the pressure applied to the filter. The aroma supply material can be compressed one or more times before or during smoking in order to provide an eruption of the menthol aroma into the smoke.
[00131] An example of a suitable formulation for the aroma supply material that forms the bead and a process for forming the aroma supply material are described below. Exemplol
[00132] The aroma supply material comprises a crosslinked pectin-alginate matrix with a plurality of domains of a menthol flavor composition dispersed throughout the matrix. For the production of the aroma supply material, the menthol aroma composition is first formed from a mixture of the following components:

[00133] The polymer matrix solution is then formed from a mixture of the following components:

[00134] A solution is formed with 20 percent w / w of the aroma composition and 8th percent w / w of the matrix solution and polymer. The solution is mixed in a shear mixer, such as a Polytron 3100B equipped with a 30 mm diameter PT-DA 3030/4 EC aggregate head, available from Kinematica. The solution is subjected to high shear at an RPM of 15000 to 20000 while maintaining the mixture at a temperature of 52 - 55 ° C. Mixing is continued for 3 to 4 minutes to produce an emulsion of the aroma composition in the polymer matrix solution in which the droplet size of the aroma composition is reduced to below 20 to 40 microns.
[00135] The resulting emulsion is formed in the form of spherical beads and poured into a crosslinking solution of the following composition, at a temperature of 4 ° C:

[00136] The beads are left in the crosslinking solution for approximately 60 seconds, with the purpose of crosslinking the albinate and pectin to form the polymer matrix. The beads are then removed from the crosslinking solution and washed in water before being dried in dry hot air at a temperature of 40 - 50 ° C for 300 minutes.
[00137] Figure 2 shows the electron microscope scan image of the aroma supply material produced in the example above. It can be seen from the picture that the internal structure of the aroma supply material is provided through the polymer hue with a plurality of small domains of the aroma composition dispersed throughout the matrix.
[00138] The profile of prolonged release of the beads of the aroma supply material can be analyzed in a flexure test. In the flexure test, a bead of the aroma supply material of a known weight is mounted on a base plate and compressed through a flat compression head that has an area larger than the bead area. The compression head exerts a downward pressing force on the bead. During the flexure test, the compression head is brought into contact with the bead and moved down through a defined distance or force referred to as the "flexure" distance or force.
[00139] The force required to move the compression head by the defined bending distance is measured. The percentage of bead deformation in the bending distance of the compression head corresponds to the bending divided by the initial bead diameter, multiplied by 100 percent. After compression, the bead is removed from the compression apparatus and the amount of the aroma composition that has been released from the aroma supply material, as a result of the applied compression force is measured.
[00140] The amount of the aroma composition released can be calculated as follows. After removing the compression apparatus, the bead is cleaned with tissue or other non-abrasive material from absorbent paper, in order to remove as much of the aroma composition from the broken domains as possible. The bead is then weighed to determine the approximate weight of the aroma composition that has been released from the material, as a result of the compression applied by comparing the measured weight with the original bead weight. With regard to the present purposes, it is assumed that the weight loss measured from the bead corresponds to the amount of the aroma composition that is released.
[00141] A sequence of similar tests is then performed with the compression head moved down through different defined flexural distances.
[00142] The measured strain and the percentage of weight lost from the beads at different compression forces were found to vary as shown in the table below. For each flexure distance, the indicated values correspond to the average of the average values based on identical tests performed on 5 accounts.

[00143] As can be seen from the results above, an increasing amount of the aroma composition is released from the aroma supply material in high compression mattes and at high levels of deformation. The results illustrate that the bead is capable of prolonged release of the aroma composition over a range of compressive forces of around 9 Newtons. In addition, the results illustrate that the bead covers a prolonged release of the aroma composition during a deformation range of around 30 percent.
[00144] In certain circumstances, it may be desirable to measure the amount of the aroma composition released from the same bead in two or more different compression forces, in order to determine the aroma release profile of a single bead. In this case, the flexural test described above is performed on a bead with a compression force applied first and after weighing the bead to determine the loss of aroma composition, the same bead is retested with a second compression force . In both tests, the procedure as described above is followed, the only difference being that a single account is used in both tests. Example 2.
[00145] The aroma supply material comprises a crosslinked alginate matrix with a plurality of domains of a menthol flavor composition dispersed throughout the matrix. The aroma supply material is prepared using processes similar to those described above in Example 1.
[00146] The aroma composition is formed by dispersing menthol and aroma in a lipophilic phase made of medium chain triglyceride (Miglyol 812N).
[00147] A hydrophilic polymer solution is then formed from alginate (Algogel 3001), corn starch (Merizet 100) and a plasticizer (polyethylene glycol (PEG) or glycerol), and mixed with the aroma composition, to the formation of an emulsion. The mixing is carried out in an Ultra-turrax device operating at 10,000 revolutions per minute and at a temperature of less than 30 degrees Celsius.
[00148] The emulsion is then added to a crosslinking solution comprising calcium chloride for the formation of the polymer matrix which has a series of domains. The emulsion is dripped into a bath of the crosslinking solution to form an aroma supply material in the form of beads. The emulsion is added dropwise through a nozzle using a peristaltic pump. The emulsion is dripped from a height of 30 centimeters through a nozzle of 4.4 mm at a flow rate of 500 grams per hour. The process is carried out at room temperature and the crosslinking solution bath is stirred using a magnetic mixer at a speed of 100 revolutions per minute. The emulsion and the cross-linking solution are allowed to react for a period of 10 minutes.
[00149] Two batches of aroma supply material were produced for this Example 2, the batches having the following compositions:

[00150] With respect to lot 1, the average numerical weight of each aromatic material bead is 17.3 milligrams and the average numerical diameter of each of the beads is 3.4 millimeters. The average water content of each bead is 3.3% by weight and the average menthol content of each bead is approximately 4 milligrams.
[00151] Regarding lot 2, the average numerical weight of each aromatic material bead is 16.3 milligrams and the average numerical diameter of each of the beads is 3.4 mm. The average water content of each bead is 4% by weight and the average menthol content of each bead is approximately 3.2 milligrams.
[00152] A number of test cigarettes were formed by taking a plurality of standard cigarettes (circumference 25 mm, length of tip protection 32 mm, length of filter plug 27 mm, length of tobacco rod 57 mm, total length 84 mm) and removing the filter plug and the plug wrap from each cigarette, thus leaving a protective tip paper tube from each cigarette attached to the tobacco rod. A new filter plug has been cut to a length of 27 millimeters and the plug wrap has been removed. A slight incision in the filter plug using a scalpel and a bead of the aroma supply material from each of lots 1 and lot 2 was inserted into the filter plug in such a way that the axial distance between the end to the mouth of the filter plug and the center of the bead was 13.5 mm. A new filter plug without the plug wrap was then inserted into the hollow paper tube at the end of each cigarette to form a plurality of cigarettes. With regard to test cigarettes that contained an account from lot 1, the average pull resistance of each test cigarette was 93 mmWG and the average ventilation of each test cigarette was 55%. With regard to cigarettes from the latter which contained a batch 2 bill, the average pull resistance of each test cigarette was 91 mmWG and the average ventilation of each test cigarette was 54%. Pull resistance was measured using the test procedure described in ISO 6565: 2002 and ventilation was measured using ISO 9512: 2002.
[00153] A panel of five smoking experts carried out a qualitative test of the test cigarettes that contained beads from lot 2. It was found that no mint notes and none of the cooling sensation were perceived without the compression of the beads. After several compressions a cooling note of mint was noticed by the panel members. Panelists noted that, as more pressure was applied to the beads, the cooling sensation and mint notes increased.
[00154] Test cigarettes that contained lot 1 beads were tested for the measurement of "menthol in smoke" (MIS) when subjected to a smoking test after varying degrees of compression.
[00155] First, the test cigarettes were grouped into sample sets each comprising 20 cigarettes. Each sample set was conditioned to 22 degrees Celsius and a relative humidity of 60%, and then each set of samples was subjected to a compression force applied simultaneously to the 20 cigarettes in each set of samples. Each set was subjected to one of the following compression forces: 700 Newtons per twenty cigarettes; 900 Newtons for 20 cigarettes; 1100 Newtons for 20 cigarettes; and 1300 Newtons for 20 cigarettes. The compression force was applied using an Instron instrument modified with a tool for the simultaneous compression of 20 cigarettes. Two minutes after applying the compression force, each sample set was smoked using a standard smoking test. Specifically, each smoking article was subjected to a standard smoking test under ISO conditions (puffs of 35ml each lasting 2 seconds, every 60 seconds), with the ventilation zone completely uncovered. The total amount of menthol contained in the cigarette smoke was measured and the test procedure repeated at each compression force for a second set of 20 cigarettes. An average value of the amount of menthol contained in the smoke of each cigarette was calculated as follows:


[00156] As can be seen from the table above with the matrix material used in these tests, the amount of menthol released does not vary linearly with respect to the applied compression force.
[00157] After the smoking tests were completed, the cigarette butts were opened and the beads removed and weighed. As shown below, the greater the compression force applied to each bead before the smoking test, the lower the residual weight of the bead after the smoking test due to the release of menthol into the cigarette. A summary of the average residual weight of the beads after being subjected to compression and smoking testing is as follows:

权利要求:
Claims (15)
[0001]
1. Smoking article (10) incorporating a sustained release liquid primer material (20), characterized by the fact that the liquid supply material (20) comprises: a closed matrix structure that defines a plurality of domains; and a liquid composition which is retained within the domains and can be released from the closed matrix structure by compressing the material, wherein the liquid supply material provides a prolonged release of the liquid composition, upon compression of the material over a force range of at least 5 Newtons.
[0002]
2. Smoking article according to claim 1, characterized by the fact that the liquid supply material provides a prolonged release of the liquid composition when compressing the material over a force range from 10 Newtons to 15 Newtons .
[0003]
Smoking article according to claim 1 or 2, characterized in that the amount of the liquid composition released from the liquid supply material when compressing the material with a force of 5 Newtons corresponds to at least 2 percent by weight of the liquid supply material before any compression and in which additional amount of the liquid composition that is released from additional compression of the material with a force of 10 Newtons corresponds to at least 10 percent by weight of the supply material liquid before any compression.
[0004]
4. Smoking article, according to any of the claims 1 to 3, characterized by the fact that the amount of liquid material composition with a force of 10 Newtons corresponds to at least 20 percent by weight of the liquid supply material prior to any compression and where the additional amount of liquid composition that is released upon additional compression of the material with a force of 15 Newtons corresponds to at least 10 weight percent of the liquid supply material before any compression.
[0005]
5. Smoking article, according to any of claims 1 to 4, characterized by the fact that the liquid-supply material provides a prolonged release of the liquid composition when the material is compressed over a deformation range of at least 25 percent.
[0006]
6. Smoking article, according to any of the vindications 1 to 5, characterized by the fact that the amount of the liquid composition released from the liquid supply material upon compression of the material to 10 percent deformation, corresponds at least 2 percent by weight of the liquid-supply material before any compression and where the additional amount of the liquid composition that is released upon further compression of the material up to 40 percent deformation corresponds to at least 10 percent in weight of the liquid supply material before any compression.
[0007]
7. Smoking article, according to any of claims 1 to 6, characterized by the fact that it incorporates an extended release aroma supply material that comprises an aroma composition.
[0008]
8. Smoking article, according to any one of the vindications 1 to 7, characterized by the fact that the liquid supply material is an aroma supply material, in which the closed matrix structure is a polymer matrix comprising one or more matrix forming polymers and a plasticizer, and wherein the liquid composition contained within the plurality of domains defined by the polymer matrix is an aroma composition, the aroma composition comprising a flavoring mixed with one or more fats that are liquid at room temperature (22 ° C).
[0009]
A smoking article according to claim 8 characterized by the fact that the aroma composition of the aroma supply material comprises a fat including at least 30 percent by weight of medium chain tri glycerides having at least least one carboxylic acid having a chain length of between 6 and 12.
[0010]
Smoking article according to claim 8 or 9, characterized in that the plasticizer in the polymer matrix of the aroma supply material comprises at least one of polyethylene glycol and glycerol.
[0011]
11. Smoking article according to any of claims 8 to 10 characterized by the fact that the amount of plasticizer in the polymer matrix corresponds to at least 5 weight percent of the matrix forming polymers.
[0012]
12. A smoking article according to any of claims 8 to 11 characterized by the fact that the matrix forming polymers in the polymer matrix of the material if the aroma supply includes at least one of alginate and pectin.
[0013]
13. Smoking article according to any of claims 1 to 12, characterized by the fact that the liquid composition comprises menthol.
[0014]
14. A smoking article according to any of claims 1 to 13, characterized in that it comprises a filter that includes the aroma supply material.
[0015]
15. Filter (12) for a smoking article, as defined in claim 1, comprising an extended release aroma supply material (20), the aroma supply material (20) characterized by the fact that it comprises: a closed matrix structure that defines a plurality of domains; and an aroma composition which is contained within the domains and which is released from the closed matrix structure upon compression of the material, wherein the aroma supply material provides a prolonged release of the composition and aroma upon compression of the matter over a force range of at least 5 Newtons.

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法律状态:
2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-08-13| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-07-07| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2020-12-01| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 02/11/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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EP11250885.8|2011-11-07|

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EP11250885|2011-11-07|

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PCT/EP2012/071768|WO2013068304A1|2011-11-07|2012-11-02|Smoking article with liquid delivery material|

---