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EP4076045B1 - Procédé de fabrication d'un matériau de filtre et/ou matériau de remplissage pour embouts destinés à être utilisés avec des produits à fumer ou des produits hnb, embouts et filtres de cigarette comprenant un tel matériau de filtre et/ou matériau de remplissage - Google Patents

Procédé de fabrication d'un matériau de filtre et/ou matériau de remplissage pour embouts destinés à être utilisés avec des produits à fumer ou des produits hnb, embouts et filtres de cigarette comprenant un tel matériau de filtre et/ou matériau de remplissage Download PDF

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Publication number
EP4076045B1
EP4076045B1 EP20808384.0A EP20808384A EP4076045B1 EP 4076045 B1 EP4076045 B1 EP 4076045B1 EP 20808384 A EP20808384 A EP 20808384A EP 4076045 B1 EP4076045 B1 EP 4076045B1
Authority
EP
European Patent Office
Prior art keywords
filter
cellulose acetate
acetate filaments
filaments
hollow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20808384.0A
Other languages
German (de)
English (en)
Other versions
EP4076045A1 (fr
Inventor
Dieter Mann
Martin Moser
Uwe SCHÄFFNER
Eckart SCHÜTZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cerdia International GmbH
Original Assignee
Cerdia International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cerdia International GmbH filed Critical Cerdia International GmbH
Publication of EP4076045A1 publication Critical patent/EP4076045A1/fr
Application granted granted Critical
Publication of EP4076045B1 publication Critical patent/EP4076045B1/fr
Active legal-status Critical Current
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
    • A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0208—Cutting filter materials
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/0216—Applying additives to filter materials the additive being in the form of capsules, beads or the like
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/022—Applying additives to filter materials with liquid additives, e.g. application of plasticisers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/061—Use of materials for tobacco smoke filters containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
    • D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/17—Filters specially adapted for simulated smoking devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/18—Mouthpieces for cigars or cigarettes; Manufacture thereof

Definitions

  • the present invention relates to a method for producing a filter and/or filling material for mouthpieces for use with smoking products or HNB products, and further to a mouthpiece for use with smoking products or HNB products, the mouthpiece having a filter and/or filling material, which is produced by such a process; and finally a cigarette filter or cigarette filter element, which has a filter and/or filling material which is produced using such a method.
  • Smoking products within the meaning of the present invention relate to classic tobacco products, in particular cigarettes, but also pipes and marijuana products as well as so-called heat-not-burn (HNB) products, vaping products and so-called hybrid products.
  • HNB heat-not-burn
  • mouthpieces for using smoking products have different functions.
  • mouthpieces can serve as a filter device, for example to remove harmful components from a stream of tobacco smoke, such as condensed substances such as tar, as well as particulate matter entrained by the stream of smoke Matter to pull out.
  • This filter function is particularly used in classic tobacco applications.
  • Mouthpiece can be designed as an integral part of a cigarette or a cigarillo and thus form a "tip" on the cigarette or on the cigarillo.
  • mouthpiece is replaceable devices, such as replaceable filter elements, which can be removed after use.
  • Such mouthpieces are accommodated in corresponding holders, for example in a cigarette holder or in a pipe mouthpiece.
  • a mouthpiece designed as an integral part of a cigarette is the cigarette filter.
  • the cigarette filter is intended to prevent the presence of harmful substances such as condensate and gases in the smoke of the cigarette.
  • the filter makes the smoke somewhat milder or more pleasant for a large proportion of smokers.
  • the filter is covered in filter wrapping paper and is coupled to the tobacco rod with the so-called tipping paper, whereby most industrially manufactured cigarettes are provided with a filter. Self-rollers can buy these from tobacco shops.
  • filter materials are already used, in particular to reduce the content of the ingredients in tobacco smoke before it reaches the smoker's respiratory system. In addition to removing the harmful components in large quantities, a satisfactory filter must also be effective without undesirably impeding the passage of air or smoke through the filter so that excessive draft is required. When used in tobacco smoke filters, the filter material must not change the taste of the tobacco smoke by adding its own taste.
  • Another important factor in the production of a satisfactory tobacco smoke filter is that its production is not too complex so that the final price of the smoking article in which the filter is used does not rise too high.
  • the present teaching relates less to filter materials for the classic tobacco applications described above, but rather in particular to filter and/or filling materials for mouthpieces for the use of smoking products, with these filter and/or filling materials in particular having other functions than just a filter function.
  • the filter function of the mouthpieces is by no means a priority.
  • HNB products heat-not-burn products
  • a portion of processed tobacco is heated by a heat source during use but is not burned.
  • Volatile tobacco components such as flavorings, nicotine, glycerin and water, evaporate and are carried away by the air that is drawn through the HNB product by the user. As the released substances cool, an aerosol is formed which is inhaled by the user.
  • HNB products usually include a device consisting of a power supply that supplies a heating element and a separate consumable item consisting of a portion of processed tobacco, a support element, such as a tubular cellulose acetate segment, a so-called cooling element downstream in the direction of flow, for example in the form of a crimped polylactide film, which is gathered into a cylinder with many axial channels, and a mouth-side filter.
  • a device consisting of a power supply that supplies a heating element and a separate consumable item consisting of a portion of processed tobacco, a support element, such as a tubular cellulose acetate segment, a so-called cooling element downstream in the direction of flow, for example in the form of a crimped polylactide film, which is gathered into a cylinder with many axial channels, and a mouth-side filter.
  • the consumables are placed into the device before use in such a way that the heating element heats the portion of tobacco when the HNB product is used.
  • IQOS/HEETS product For example, in a so-called IQOS/HEETS product from Philip Morris, the tobacco portion is skewered onto a heating blade in the device.
  • An IQOS/HEETS product is an IQOS device marketed by Philip Morris with the associated HEETS consumable item.
  • the HEETS consumable is a heat-not-burn product in which tobacco is simply heated instead of burning it.
  • a competing product from BAT heats the tobacco from the outside, with the so-called cooling element replaced by a tube.
  • a portion of processed tobacco is heated by a heat source during use but is not burned.
  • Volatile tobacco components such as flavorings, nicotine, glycerin and water, evaporate and are carried away by the air that is drawn through the HNB product by the user. As the released substances cool, an aerosol is formed which is inhaled by the user.
  • an aerosol former is first evaporated (propylene glycol, glycerin), and an aerosol is formed by cooling. This aerosol is passed through a portion of processing tobacco and inhaled by the consumer. Even in such applications, the mouthpiece has the particular function of protecting the user-side end against heating that is unpleasant for the user.
  • the elements downstream of the heated tobacco portion in the direction of flow such as the cooling element and the mouth-side filter, only have a small filtering effect with regard to condensed components such as tar because these smoke components can be produced in significantly smaller amounts.
  • the filter rod hardness is an important target criterion for cigarette filters. It is usually stated as the so-called Filtrona hardness.
  • the Filtrona hardness is determined by holding a cylindrical rod of 12 mm diameter with its flat The front side is pressed vertically onto a horizontally positioned filter rod with a load of 300 g. The ratio of the compressed diameter to the initial diameter previously determined by the first touch results in the percentage of Filtrona hardness.
  • Filtrona hardness is only measured on a filter, but not on the underlying filter (raw) material.
  • the triacetin sprayed onto all cigarette filters influences the Filtrona hardness.
  • the minimum limit of Filtrona hardness is around 88% and is based on market requirements.
  • the Filtrona hardness of the cigarette filter can preferably be set to approximately 88% to 95%, in particular approximately 90% to 93%.
  • the Filtrona hardness is essentially determined by the fiber weight per unit volume.
  • the filament titer only has a minor influence on the Filtrona hardness.
  • a tipping paper is a paper with which either several filter elements are coupled together or filter elements are coupled to the tobacco rod.
  • increasing Filtrona hardness by using a stronger filter wrapping paper or a stronger tipping paper has economic disadvantages as higher costs are expected with this approach.
  • the so-called “hot collapse” is related to Filtrona hardness, in which the filter hardness decreases during smoking. This can occur in particular if the filter of a classic cigarette heats up in the presence of moisture during one of the last puffs. This undesirable effect can also occur with HNB products.
  • the mouthpiece material In addition to a Filtrona hardness that is as constant and high as possible when using a smoking product, the mouthpiece material should also show a predetermined or determinable filtration performance.
  • the filtration performance is selected (among other influencing factors such as tobacco blend, ventilation, etc.) in order to adjust the "delivery” of the cigarette (content of smoke ingredients in mainstream smoke).
  • “delivery” is limited by law. Below the legal limit, “delivery” can be adjusted to consumer preferences.
  • HNB products there is much less condensed matter with negative health relevance in the aerosol than with conventional products.
  • desired substances such as flavor-forming substances and nicotine
  • the aim here is to choose the lowest possible filtration performance, which, however, must not fall to zero.
  • the filter in addition to setting the "delivery" is used to adjust the pulling resistance of the cigarette.
  • the draw resistance contribution of the mouth-side filter (mouthpiece) tends to be as low as possible, since the other components of the HBN device, in particular the heated tobacco portion and the device, already have a high draw resistance contribution.
  • a low tensile resistance of the filter (mouthpiece) leads to degrees of freedom for the other components of the HBN device, which is desirable.
  • draft resistance and filtration performance can be reduced by reducing the filter length.
  • the filter length becomes smaller than the filter diameter, the processability becomes problematic.
  • a shorter filter leads to a shorter cooling distance, which is problematic for the heat balance.
  • the tensile resistance and the filtration performance can be reduced by reducing the fiber weight in the filter material per volume fraction and/or the total denier.
  • this has the disadvantage that the Filtrona hardness decreases and under certain circumstances the minimum hardness can no longer be achieved.
  • the pulling resistance and the filtration performance can be reduced by increasing the filament titer.
  • the filtration performance and tensile resistance are reduced as the filament titer increases, which is desirable for HNB products compared to conventional products. Since, as stated above, the Filtrona hardness hardly depends on the filament titer, the hardness is not negatively affected.
  • the consumer prefers a mouthpiece with a flat, white cross-sectional area on the mouth side.
  • the target parameter “Optics” it should be noted that the consumer prefers a mouthpiece with a flat, white cross-sectional area on the mouth side.
  • products that are shaped into a tube on the mouth side are also products that are shaped into a tube on the mouth side.
  • the smoke temperature is not a problem with today's conventional products.
  • the smoking temperature is noticeably high and, for some consumers, uncomfortably high.
  • commercially available HNB products require cooling to cool the evaporated components so that an aerosol is formed from the gaseous components.
  • the distance from the heating element to the end of the mouth of the HNB article is certainly the most important parameter for cooling the aerosol.
  • a so-called cooling element downstream of the tobacco portion and the support element can be designed in the form of a crimped polylactide film or in the form of a cardboard tube, whereby - in addition to cooling - this element downstream of the tobacco portion and the support element also has the function of a placeholder that provides mechanical stability.
  • mouthpiece materials must meet the target parameter of cost-effectiveness. There is a particular need for suitable mouthpiece materials that can be produced with the lowest possible use of materials and with the lowest possible process costs.
  • HNB products as well as conventional smoking products, generally have the disadvantage that the inhaled aerosol is absorbed by the user at a high temperature. This is sometimes unpleasant for the user.
  • the mouthpiece materials In the case of HNB products in particular, the mouthpiece materials have the task of cooling the aerosol with the lowest possible filtration performance.
  • filter materials or materials for the mouthpiece must have a - in comparison to filter materials for King size cigarettes - offer reduced filtration performance and increased cooling and improved haptic properties (firm but not too hard grip).
  • a low filtration performance is aimed for. If the amount of filter material is simply reduced for this purpose, the filter hardness will eventually become insufficient.
  • Filters for slim or ultra-slim cigarettes also have significantly higher draw resistance than king-size filters with the same fiber density, which is generally not desirable.
  • the present invention is based on the object of specifying a material which is suitable for a wide range of applications in tobacco products.
  • the present invention is based on the object of specifying a filter material with low tensile resistance and low filtration performance, with the filter material being able to achieve a sufficiently high Filtrona hardness that is as constant as possible when used in smoking products, and yet the filter material can be produced particularly economically.
  • the filter material should be suitable for producing a filter with a uniform, white and flat mouth-side end face.
  • the filter material it is also desirable for the filter material to have a selective filtration effect on phenols.
  • the filter material should be particularly suitable for reliably cooling a heated particle-laden gas, so that the temperature of the gas, aerosol or vapor absorbed by the user from a smoking article can be reduced.
  • the material should be suitable so that when the material is used as a filter material for, in particular, slim or ultra-slim cigarettes, an adjustable and, in particular, reduced draw resistance compared to king-size filters can be achieved.
  • the present teaching relates in particular to a material for forming a mouthpiece for smoking products, the material having a filling material which is based on cellulose acetate filaments, which are at least partially designed as hollow-shaped cellulose acetate filaments.
  • the filling material which is partly designed as hollow-shaped cellulose acetate filaments, has a lower density and a higher filling value than classic cellulose acetate filaments, which are not hollow-shaped and which are usually used in cigarette filters.
  • hollow-shaped fiber used here is to be understood in particular as meaning a preferably cylindrical fiber which has one or more continuous cavities in cross section.
  • the hollow-shaped fibers are preferably at least partially crimped.
  • the invention is not limited to crimped hollow fibers, but also relates to non-crimped fibers and their use.
  • the hollow-shaped fibers are at least partially designed as multi-lumen hollow fibers.
  • multi-lumen hollow fibers are significantly more resistant to kinks, which means that particularly high Filtrona hardness levels can be achieved without increased material compaction.
  • Filtrona hardness used herein means the filter hardness determined according to the Filtrona principle. With this principle, the filter hardness is determined by pressing a cylindrical rod with a diameter of 12 mm with its flat face vertically onto a horizontally positioned filter rod with a load of 300 g. The ratio of the compressed diameter to the initial diameter previously determined by the first touch results in the percentage of Filtrona hardness.
  • the hollow-shaped cellulose acetate filaments at least partially have a trilobal, i.e. three-armed star-shaped cross-sectional shape.
  • a cross-sectional shape is suitable if the cellulose acetate filaments should have the largest possible specific surface area, for example to enable high filtration capacity while at the same time economical use of raw materials.
  • other cross-sectional shapes are also conceivable for the hollow-shaped cellulose acetate filaments, such as a square cross-sectional shape.
  • the filter and/or filling material can be produced inexpensively and can be processed alone or with classic cellulose acetate filaments that are not hollow-shaped to form a filter rod with suitable tensile resistance and optimized filter properties.
  • the filter and/or filling material has a filling material which is based on cellulose acetate filaments, which are at least partially designed as hollow-shaped cellulose acetate filaments, a low tensile resistance and a low filtration performance can be achieved, since the filaments of the filter are at least partially designed as hollow-shaped cellulose acetate filaments - and/or filling material have a low external surface area based on the total fiber volume. It is preferred that the filaments of the filter and/or filling material, which are at least partially designed as hollow cellulose acetate filaments, have a cross section that is as round as possible.
  • the filter and/or filling material is suitable for producing a filter with a uniform, white and flat mouth-side end face, whereby a selective filtration effect on phenols can also be achieved.
  • filter rods can be produced, especially for cigarettes, which have demonstrably outstanding properties regarding specific retention phenomena with regard to the discussion regarding smoking and health.
  • a filter made of cellulose acetate filters nitrosamines and phenols, which are harmful to health, much more efficiently than condensate and nicotine.
  • the smoke taste of today's common tobacco blends, such as "American Blend”, “German Blend” and “Virginia” in combination with a filter rod made of cellulose acetate is judged by the smoker to be the most pleasant.
  • Another advantage of a filter rod made of cellulose acetate that should not be underestimated is the optical homogeneity of the cut surfaces of the filter.
  • the filter and/or filling material is at least partially formed from hollow-shaped cellulose acetate filaments, which serve as filling material, the tensile resistance and filtration performance of filter rods made from the material according to the invention can be varied over a wide range.
  • a filter material which at least partially consists of hollow-shaped cellulose acetate filaments has an improved thermal cooling effect. It was found that by using hollow-shaped cellulose acetate filaments as filling material, a very low filter effect, ie retention effect, for the suspended matter and gases to be removed can still be achieved. It is assumed that this effect is achieved by the hollow-shaped cellulose acetate filaments changing the surface or the flow of the gas or air to be cleaned in such a way that any suspended matter present in the gas or air is hardly retained. Another reason could be that a different, particularly advantageous surface structure of the filter material can be achieved by using hollow-shaped cellulose acetate filaments.
  • the filter and/or filling material also has the advantage that it enables particularly adjustable cooling of a heated particle-laden gas (in particular aerosol), so that the temperature of the gas, aerosol or vapor absorbed by the user of a smoking article or HNB product can be controlled in a targeted manner can be reduced.
  • a heated particle-laden gas in particular aerosol
  • the desired cooling effect can be adapted to the specific application.
  • the viscosity of the aerosol essentially air means that the path of least resistance is chosen (i.e. it flows between the filaments and not through each individual filament.
  • the effective filtration surface is in no way maximized, since the hollow-shaped cellulose acetate filaments in the filter and/or filling material are not flowed through.
  • the hollow-shaped cellulose acetate filaments can have kinks that close the lumen of the hollow-shaped cellulose acetate filaments, without this having an influence on the performance of the filter and/or filling material with regard to the set target parameters.
  • hollow-shaped cellulose acetate filaments designed as hollow fibers do not have to be hollow throughout, but can also be partially closed by kinks. They can also deviate from an ideal circular shape.
  • the hollow-shaped cellulose acetate filaments of the filter and/or filling material serve on the one hand as a carrier material and on the other hand as a cooling material. Because the hollow-shaped cellulose acetate filaments also serve as a carrier material, they are particularly compact Mouthpieces can be realized where the dimensions of the smoking article do not have to be increased.
  • the filter and/or filling material has adjacent areas with hollow-shaped cellulose acetate filaments and non-hollow-shaped cellulose acetate filaments in the longitudinal direction of the mouthpiece.
  • a mixture of hollow and non-hollow cellulose acetate filaments would also be conceivable.
  • the hollow and non-hollow cellulose acetate filaments may be arranged in layers and then folded. In this way, the largest possible area of the hollow cellulose acetate filaments serving as cooling material is possible, whereby the particle-laden gas can be cooled better.
  • the filter and/or filling material can be introduced into the smoking article in such a way that, in particular, the hollow-shaped cellulose acetate filaments are arranged essentially along the flow direction of the particle-laden gas or the aerosol. In this way, it can be achieved that the filter and/or filling material only causes a reduced pressure loss when the user sucks on the mouthpiece, so that the user does not perceive the suction as strenuous or unpleasant.
  • the tensile resistance of the filter and/or filling material can be varied over a wide range and adapted to the respective application.
  • the filter and/or filling material consists only of hollow-shaped cellulose acetate filaments.
  • the filter and/or filling material then has optimal cooling performance with reduced filtration performance.
  • a further embodiment of the filter and/or filling material provides that the filter and/or filling material is arranged as a separate segment in front of the mouthpiece in the flow direction of the particle-laden gas or aerosol.
  • the separate segment can have a variety of shapes. A preferred cylindrical shape is described as an example, to which the invention should not be limited. Conventional smoking articles are usually essentially cylindrical.
  • the separate segment can also be arranged in front of a possible filter in the flow direction of the particle-laden gas.
  • the filter and/or filling material that serves as a cooling device and is designed as a separate segment can, for example, consist entirely of hollow-shaped cellulose acetate filaments.
  • the separate segment has a covering, for example made of paper or a type of housing, so that the hollow-shaped cellulose acetate filaments serving as cooling material can be encapsulated.
  • the casing or housing has an inlet opening and an outlet opening for the particle-laden gas or aerosol, through which it flows due to the user's suction through the mouthpiece.
  • the hollow-shaped cellulose acetate filaments serving as cooling material can, for example, also optionally be attachable in or on the smoking article in encapsulated form. In this way, a user has the option of only cooling the particle-laden gas if they consider it necessary.
  • the tensile resistance of a filter rod formed from the filter material can be varied over a significantly larger range by varying the proportion of hollow-shaped cellulose acetate filaments in the filter material.
  • the tensile resistance and the filtration performance can be adapted to the respective requirements over a wide range, and in fact significantly more flexibly than with conventional filter materials based on cellulose acetate filaments case is.
  • a cooling effect can be adjusted variably.
  • the present invention allows mouthpieces or filters to be formed from cellulose acetate, which is normally in the form of a strand of essentially longitudinally directed endless filaments, the endless filaments preferably being crimped so that short areas of the individual filaments are irregularly inserted are arranged in non-parallel, converging and diverging directions compared to the predominantly longitudinal direction of the strand.
  • the surface structure of the filter material can be varied by using, in particular, crimped cellulose acetate filaments.
  • the crimp index of the cellulose acetate filaments is preferably between 10% and 60%, and in particular between 20% and 50%.
  • the curl index I x is a measure of the intensity of the curl.
  • the test load is 25 N and the preload is 2.5 N.
  • the clamping length is 250 mm.
  • the crimp index is determined in a tensile test with a constant stretching rate of 300 mm/min on a G02 device from Borgwaldt GmbH, Hamburg. 10 individual measurements are recorded per measurement. The test is carried out under standard climate: 20 °C and 60% relative humidity.
  • the filter material is preferably in the form of a filter tow consisting of endless, stufferbox-crimped cellulose acetate filaments, and in particular cellulose 2,5-acetate filaments.
  • a solution of approximately 30% cellulose 2,5-acetate in acetone is pressed through special spinnerets, the acetone evaporates in a spinning shaft by blowing it with heated air, producing a large number of filaments (1,000 to 35,000). summarized in a band and then curled into a bush chamber. The product is then dried, poured into storage containers and finally pressed into bales weighing 300 to 600 kg.
  • spinnerets are used, which are designed to spin hollow-shaped cellulose acetate filaments and/or cellulose acetate staple fibers.
  • the filter tow is removed from the bale and placed on a filter rod machine, such as in the publication US 5,460,590 A described, processed into filter rods.
  • the filter tow is stretched in a stretching device, provided with an additive used to bond the filaments and then, after forming a three-dimensional fuse, it is introduced into the format part with the help of an inlet funnel, where it is compressed transversely axially, covered with paper and to the final length of the filter rods cut.
  • the additive applied to bond the filaments can be a high-boiling solvent for cellulose acetate, such as glycerol triacetate (triacetin), which briefly dissolves the surface of the filaments after its application. Wherever two filaments happen to touch each other, a solid bond occurs some time later because the excess additive migrates into the fiber surface, causing the previously liquid drop of solution to solidify.
  • a high-boiling solvent for cellulose acetate such as glycerol triacetate (triacetin)
  • triacetin glycerol triacetate
  • filter rods which are also referred to as "space filters", and which have a low packing density of usually 20 mg/ml to 90 mg / ml, preferably 30 to 70 mg/ml and more preferably 40 to 60 mg/ml. Due to their hardness, these filter rods can be processed at high speeds without any difficulty on modern cigarette machines.
  • the tensile resistance can be as low as required despite increasing the cooling capacity and reducing the filter capacity Range can be maintained without causing an increase in the filament titer.
  • the proportion of hollow-shaped (hollow) cellulose acetate filaments in the filter material is between 20 to 100% and preferably between 40 to 100% and even more preferably - depending on the application - between 70 to 100%.
  • the hollow content in the filter material is preferably 25 to 90% and preferably 50 to 80%.
  • This hollow portion makes a decisive contribution to the filtration performance on the one hand and to the reduction of tensile resistance on the other, which can only be achieved due to a corresponding proportion of hollow fibers in the filter material, but not with closed filaments.
  • the hollow portion corresponds to the ratio of the “hollow” area of the filter material to the “total” cross-sectional area of the fibers.
  • the filter material according to the invention is particularly characterized by the fact that the filament diameter of the cellulose acetate filaments is significantly larger than the filament diameter of other (synthetic) hollow fibers, the filament diameter of which is in the range between 10 and 30 ⁇ m.
  • the filament diameter of the hollow cellulose acetate filaments is in the range between 30 to 150 ⁇ m (outer diameter), and preferably between 50 to 120 ⁇ m (outer diameter), and according to the invention between 60 to 100 ⁇ m (outer diameter).
  • the hollow portion can be increased and thus the specific filtration performance of the filter and/or filling material according to the invention can be significantly reduced, while at the same time the cooling performance of the filter and/or filling material according to the invention is increased.
  • the invention further relates to a cigarette filter made of a filter material of the aforementioned type.
  • thermoplastic cellulose ester fiber material or, in the case of a non-thermoplastic cellulose ester, a water-soluble adhesive may be used.
  • a thermoplastic cellulose ester fiber material two cases can be distinguished.
  • the fiber material is made from a naturally thermoplastic cellulose ester, such as cellulose acetobutyrate.
  • the filter tow can be processed into filters according to the invention without further measures.
  • a non-thermoplastic starting polymer such as cellulose 2,5-acetate, it must be thermoplasticized by adding a suitable plasticizer.
  • a filter tow is pulled off a bale, spread out pneumatically and stretched using the usual process for spatial filters.
  • the acetate weight can be a maximum of 5 mg per mm of filter length and at least about 2 mg per mm of filter length and is in particular about 3 to 4 mg per mm of filter length. If the maximum value of 5 mg per mm of filter length is exceeded, then such a product is not sufficiently economical. Preferably, a minimum value of approximately 2 mg per mm of filter length is maintained. If this value is not reached, the desired hardness of the cigarette filter of at least 88% can no longer be maintained according to the state of the art.
  • the tensile resistance can be a maximum of 2 mm daPa per mm filter length and at least approximately 0.1 daPa per mm filter length and is in particular 0.2 daPa to 1 daPa per mm filter length.
  • a tensile resistance of 0.3 daPa to 0.7 daPa per mm of filter length is particularly preferred.
  • a minimum value of 0.3 daPa per mm of filter length is maintained. If this value is not reached, then the desired hardness of the filter of at least 88% can no longer be maintained according to the current state of the art.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Artificial Filaments (AREA)

Claims (15)

  1. Procédé de fabrication d'un matériau de filtrage et/ou de remplissage pour embouts buccaux destinés à être utilisés avec des articles à fumer ou des produits HNB (tabac chauffé), qui est constitué de filaments d'acétate de cellulose et/ou de fibres filées d'acétate de cellulose,
    dans lequel
    une solution d'acétate de cellulose ayant un indice d'acétyle d'au moins 53 % dans l'acétone est pressée à travers une filière à plusieurs orifices, et ensuite, le cas échéant, les filaments d'acétate de cellulose sont coupés en fibres filées d'acétate de cellulose, et une pluralité des filaments d'acétate de cellulose et/ou des fibres filées d'acétate de cellulose ainsi obtenus sont rassemblés en un cordon filtrant, qui est éventuellement frisé,
    la filière à travers laquelle la solution d'acétate de cellulose est pressée est conçue de telle sorte que des filaments d'acétate de cellulose creux sont filés, la proportion de creux dans le matériau de filtrage et/ou de remplissage étant - par rapport à une coupe orthogonale aux fibres du matériau de filtrage et/ou de remplissage - de 25 % à 90 % et de préférence de 50 % à 80 %, et le diamètre de filament des filaments d'acétate de cellulose se situant dans une plage comprise entre 60 et 100 µm.
  2. Procédé selon la revendication 1,
    dans lequel l'indice de frisure des filaments d'acétate de cellulose est compris entre 10 % et 60 %, en particulier entre 20 % et 50 %.
  3. Procédé selon la revendication 1 ou 2,
    dans lequel les filaments d'acétate de cellulose contiennent un plastifiant réparti uniformément ; et/ou
    un agent de collage soluble dans l'eau est présent à la surface des filaments d'acétate de cellulose.
  4. Procédé selon l'une des revendications 1 à 3,
    dans lequel les filaments d'acétate de cellulose et/ou les fibres filées d'acétate de cellulose contiennent un plastifiant, et la teneur en plastifiant est comprise entre 1 et 40 % ; et/ou
    les filaments d'acétate de cellulose et/ou les fibres filées d'acétate de cellulose contiennent un plastifiant, et le plastifiant est la triacétine, le diacétate de triéthylène glycol et/ou l'ester diéthylique de l'acide citrique.
  5. Procédé selon l'une des revendications 1 à 4,
    dans lequel les filaments d'acétate de cellulose ont une finesse comprise entre 5 et 30 deniers, de préférence entre 10 et 25 deniers, et de manière encore plus préférée entre 15 et 20 deniers ; et/ou
    le titre total du matériau de filtrage et/ou de remplissage est compris entre 4 000 et 40 000 deniers et de préférence entre 6 000 et 30 000 deniers.
  6. Procédé selon l'une des revendications 1 à 5,
    dans lequel le taux massique de filaments d'acétate de cellulose creux est compris entre 20 et 100 %, de préférence entre 50 et 100 %, et de manière encore plus préférée entre 70 et 100 %.
  7. Procédé selon l'une des revendications 1 à 6,
    dans lequel les filaments d'acétate de cellulose creux sont disposés à des distances mutuelles dans une disposition non régulée, et
    les filaments d'acétate de cellulose sont réticulés, les filaments d'acétate de cellulose de liaison étant entrelacés et/ou accrochés les uns aux autres ; et/ou
    il est en outre prévu un liant, en particulier un liant organique ou inorganique, pour maintenir ensemble les filaments d'acétate de cellulose.
  8. Embout buccal destiné à être utilisé avec des articles à fumer ou des produits HNB (tabac chauffé), ledit embout buccal comprenant un matériau de filtrage et/ou de remplissage fabriqué par un procédé selon les revendications 1 à 7.
  9. Embout buccal selon la revendication 8,
    dans lequel la densité de fibres du matériau de filtrage et/ou de remplissage est comprise entre 10 et 70 kg par m3 et, de préférence, entre 20 et 70 kg par m3 et, de manière encore plus préférée, entre 40 et 60 kg par m3 ; et/ou
    le filtre de cigarette ou l'élément filtrant de cigarette présente une dureté Filtrona d'au moins 88 % et, de préférence, une dureté Filtrona de 88 % à 95 % et, de manière encore plus préférée, une dureté Filtrona de 90 % à 93 % ; et/ou
    le filtre de cigarette ou l'élément filtrant de cigarette présente une résistance au tirage d'au moins 0,1 daPa par mm de longueur de filtre et, de préférence, une résistance au tirage de 0,2 daPa à 1,0 daPa par mm de longueur de filtre et, de manière encore plus préférée, une résistance au tirage de 0,3 daPa à 0,7 daPa par mm de longueur de filtre.
  10. Embout buccal selon la revendication 8 ou 9,
    dans lequel, en outre, un élément de libération de goût, en particulier en forme de capsule ou de type capsule, est incorporé dans le matériau de filtrage et/ou de remplissage.
  11. Embout buccal selon l'une des revendications 8 à 10,
    dans lequel le matériau de filtrage et/ou de remplissage présente, en plus des filaments d'acétate de cellulose creux, des filaments d'acétate de cellulose massifs.
  12. Filtre de cigarette ou élément filtrant de cigarette comprenant un matériau de filtrage et/ou de remplissage fabriqué par un procédé selon les revendications 1 à 7.
  13. Filtre de cigarette ou élément filtrant de cigarette selon la revendication 12,
    dans lequel la densité de fibres du matériau de filtrage et/ou de remplissage est comprise entre 10 et 70 kg par m3 et, de préférence, entre 20 et 70 kg par m3 et, de manière encore plus préférée, entre 40 et 60 kg par m3 ; et/ou
    le filtre de cigarette ou l'élément filtrant de cigarette présente une dureté Filtrona d'au moins 88 % et, de préférence, une dureté Filtrona de 88 % à 95 % et, de manière encore plus préférée, une dureté Filtrona de 90 % à 93 % ; et/ou
    lequel le filtre de cigarette ou l'élément filtrant de cigarette présente une résistance au tirage d'au moins 0,1 daPa par mm de longueur de filtre et, de préférence, une résistance au tirage de 0,2 daPa à 1,0 daPa par mm de longueur de filtre et, de manière encore plus préférée, une résistance au tirage de 0,3 daPa à 0,7 daPa par mm de longueur de filtre.
  14. Filtre de cigarette ou élément filtrant de cigarette selon la revendication 12 ou 13,
    dans lequel, en outre, un élément de libération de goût, en particulier en forme de capsule ou de type capsule, est incorporé dans le matériau de filtrage et/ou de remplissage.
  15. Filtre de cigarette ou élément filtrant de cigarette selon l'une des revendications 12 à 14,
    dans lequel le filtre de cigarette ou l'élément filtrant de cigarette présente, en plus des filaments d'acétate de cellulose creux, des filaments d'acétate de cellulose massifs.
EP20808384.0A 2019-12-19 2020-11-18 Procédé de fabrication d'un matériau de filtre et/ou matériau de remplissage pour embouts destinés à être utilisés avec des produits à fumer ou des produits hnb, embouts et filtres de cigarette comprenant un tel matériau de filtre et/ou matériau de remplissage Active EP4076045B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019135114.6A DE102019135114A1 (de) 2019-12-19 2019-12-19 Filter- und/oder füllmaterial für mundstücke zur verwendung mit rauchwaren oder hnb-produkten, mundstücke und zigarettenfilter mit einem solchen filter- und/oder füllmaterial sowie verfahren zur herstellung eines solchen filter- und/oder füllmaterials
PCT/EP2020/082495 WO2021121839A1 (fr) 2019-12-19 2020-11-18 Matériau de filtre et/ou matériau de remplissage pour embouts destinés à être utilisés avec des produits à fumer ou des produits hnb, embouts et filtres de cigarette comprenant un tel matériau de filtre et/ou matériau de remplissage, et procédé de fabrication d'un tel matériau de filtre et/ou matériau de remplissage

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EP4076045A1 EP4076045A1 (fr) 2022-10-26
EP4076045B1 true EP4076045B1 (fr) 2023-11-15

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US (1) US20230017871A1 (fr)
EP (1) EP4076045B1 (fr)
JP (1) JP7407944B2 (fr)
KR (1) KR20220116495A (fr)
CN (1) CN114867370B (fr)
BR (1) BR112022011737A2 (fr)
DE (1) DE102019135114A1 (fr)
ES (1) ES2971668T3 (fr)
PL (1) PL4076045T3 (fr)
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DE102021125415A1 (de) 2021-09-30 2023-03-30 Cerdia International GmbH Filterelement für mundstücke zur verwendung mit rauchwaren oder hnb-produkten
DE102022102862A1 (de) * 2022-02-08 2023-08-10 Cerdia International GmbH Filterelement für mundstücke, mundstück zur verwendung mit rauchwaren oder hnb-produkten und zigarettenfilter

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PL4076045T3 (pl) 2024-05-06
CN114867370B (zh) 2025-01-10
KR20220116495A (ko) 2022-08-23
CN114867370A (zh) 2022-08-05
WO2021121839A1 (fr) 2021-06-24
DE102019135114A1 (de) 2021-06-24
JP2023511507A (ja) 2023-03-20
US20230017871A1 (en) 2023-01-19
UA128970C2 (uk) 2024-12-11
JP7407944B2 (ja) 2024-01-04
EP4076045A1 (fr) 2022-10-26
ES2971668T3 (es) 2024-06-06
BR112022011737A2 (pt) 2022-08-30

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