EP1567025B1 - Element filtrant - Google Patents
Element filtrant Download PDFInfo
- Publication number
- EP1567025B1 EP1567025B1 EP03775194A EP03775194A EP1567025B1 EP 1567025 B1 EP1567025 B1 EP 1567025B1 EP 03775194 A EP03775194 A EP 03775194A EP 03775194 A EP03775194 A EP 03775194A EP 1567025 B1 EP1567025 B1 EP 1567025B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- starch
- filter element
- filtering material
- forming
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims abstract description 53
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229920002472 Starch Polymers 0.000 claims abstract description 49
- 239000008107 starch Substances 0.000 claims abstract description 49
- 235000019698 starch Nutrition 0.000 claims abstract description 49
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000004628 starch-based polymer Substances 0.000 claims abstract description 9
- 229920003179 starch-based polymer Polymers 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 3
- 241000208125 Nicotiana Species 0.000 claims description 22
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 20
- 239000006260 foam Substances 0.000 claims description 20
- 239000000779 smoke Substances 0.000 claims description 15
- 239000000654 additive Substances 0.000 claims description 4
- 239000002657 fibrous material Substances 0.000 claims description 4
- 229920005594 polymer fiber Polymers 0.000 claims description 4
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 235000009120 camo Nutrition 0.000 claims description 3
- 235000005607 chanvre indien Nutrition 0.000 claims description 3
- 239000011487 hemp Substances 0.000 claims description 3
- 229920002959 polymer blend Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229920003043 Cellulose fiber Polymers 0.000 claims description 2
- 235000012438 extruded product Nutrition 0.000 claims 4
- 239000000155 melt Substances 0.000 claims 4
- 238000010438 heat treatment Methods 0.000 claims 2
- 238000004898 kneading Methods 0.000 claims 2
- SJZRECIVHVDYJC-UHFFFAOYSA-N 4-hydroxybutyric acid Chemical compound OCCCC(O)=O SJZRECIVHVDYJC-UHFFFAOYSA-N 0.000 claims 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims 1
- 239000004372 Polyvinyl alcohol Substances 0.000 claims 1
- 239000004088 foaming agent Substances 0.000 claims 1
- 229920000747 poly(lactic acid) Polymers 0.000 claims 1
- 229920000728 polyester Polymers 0.000 claims 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 claims 1
- 239000004626 polylactic acid Substances 0.000 claims 1
- 229920002451 polyvinyl alcohol Polymers 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 abstract description 23
- 239000002245 particle Substances 0.000 abstract description 14
- 230000036541 health Effects 0.000 abstract description 6
- 230000000391 smoking effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000001464 adherent effect Effects 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 8
- 229940081735 acetylcellulose Drugs 0.000 description 6
- 229920002301 cellulose acetate Polymers 0.000 description 6
- 239000003053 toxin Substances 0.000 description 5
- 231100000765 toxin Toxicity 0.000 description 5
- 108700012359 toxins Proteins 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 210000004072 lung Anatomy 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- KMZHZAAOEWVPSE-UHFFFAOYSA-N 2,3-dihydroxypropyl acetate Chemical compound CC(=O)OCC(O)CO KMZHZAAOEWVPSE-UHFFFAOYSA-N 0.000 description 2
- 229920001222 biopolymer Polymers 0.000 description 2
- 235000019506 cigar Nutrition 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- ZAMLGGRVTAXBHI-UHFFFAOYSA-N 3-(4-bromophenyl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid Chemical compound CC(C)(C)OC(=O)NC(CC(O)=O)C1=CC=C(Br)C=C1 ZAMLGGRVTAXBHI-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920008262 Thermoplastic starch Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001592 potato starch Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000009747 swallowing Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- A24D3/066—Use of materials for tobacco smoke filters characterised by structural features in the form of foam or having cellular structure
-
- 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
-
- 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
- A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
- A24D3/163—Carbon
Definitions
- the invention relates to a filter element with a biodegradable filter material mainly from renewable raw materials for use in particular as a cylindrical tobacco smoke filter of cigarettes, cigars or pipes and a method for its production.
- Cigarettes have a cylindrical shape in which the smokable tobacco material in shredded form is surrounded by a sheath of paper. Predominantly, these cigarettes have at one end a filter which is connected to the cigarette by a banderole. Filter elements and cigarette filters are extensively described in the literature as filter tow.
- Filter elements and cigarette filters are extensively described in the literature as filter tow.
- a fiber material made of the materials cellulose-acetate or polypropylene is usually used.
- activated carbon is also known. According to known methods, cellulose acetate fiber material is produced essentially by the jet spinning method.
- the filter tows are first prepared as filter rods by stretching the crimped ribbon, increasing in volume, and scaling to the desired dimension in a formulator and wrapped in paper.
- the cellulose-2,5-acetate raw materials are usually compounded with glycerol acetate as a plasticizer, which is not easily contained in tobacco smoke.
- EP 0 658 320 B1 The state of the art is further referred to EP 0 658 320 B1, EP 0 636 324 B1 and DE 33 11903 A1.
- the object of the invention is to provide a filter tow or filter material for the production of filters for smokers, in which health risks resulting from the release of filter constituents and the external contamination of cigarettes with filter constituents are avoided or at least reduced.
- the invention is based on the basic concept of producing a filter element made of a starch material and / or a polymer mixture based on starch and optionally activated carbon, pores and / or filter channels being provided in the filter element.
- the filter element may contain a filter material made of starch foam, starch polymer fibers or biopolymer films and optionally stored activated carbon layers.
- Such filter materials optionally adherent or Filter particles released during smoking can be dissolved in an environment with appropriate moisture content. They are not considered for the health-damaging effects discussed at the outset.
- the activated carbon may be in the form of powder or granules and be present in various ways in the filter material of starch and / or a starch-based polymer mixture.
- the starch may, for example, be foamed and form a carrier material for the activated carbon.
- the activated carbon can be sprayed on a foamed filter material made of starch material or incorporated as an intermediate layer.
- the starch material may be formed flat (eg as a foamed plate) or foamed into an endless round filter rod and cut into correspondingly shaped sections.
- natural fibers such as cellulose fibers, hemp or cotton fibers may be incorporated in an amount of about 5% by volume.
- an activated carbon layer is applied to cut starch foam sections, sprayed, for example as a powder, or placed in another way between starch foam sections or arranged thereon.
- the layers of starch foam and activated carbon thus joined and bonded together are wrapped in a film or other suitable cover.
- the round filter rod then has a stack, i. alternately arranged transversely to the gas flow disks or layers of starch foam and activated carbon.
- filter channels can be introduced to z. B. to be able to influence the passage of the aromatragenden molecules of tobacco.
- These filter channels can be formed for example by needles, water jets or laser at any time during the manufacture of the filter elements.
- the arrangement and thickness of the layers of the Filter element is irrelevant. So z. B. starch foam sections stored and later, the intended use, if appropriate, combined with intermediate layers of activated carbon to filter elements and wrapped with foil.
- the filter channels may extend or be oriented approximately in the direction of the gas flow, but deviations are possible.
- the filter channels may also extend partially transverse to the direction of the tobacco gas stream.
- filter elements designed as round filter rods can be wrapped with a corresponding air-permeable and / or perforated paper band or the filter channels are introduced into the finished filter rod wrapped in a band.
- the filter channels may have a size or width of preferably 50 to 100 .mu.m, and extending into this up to a certain depth, for example, starting from one or both ends of the filter element or round filter rod.
- the filter channels may also be oriented longitudinally and extend through the entire round filter rod. Due to the shape, size, number and arrangement of the filter channels, the filter effect can be influenced.
- the activated carbon may be formed as granules.
- the cohesion of the individual layers of the filter element may be substantially determined by the wrapping material, e.g. a shrink wrap, be guaranteed.
- a filter element By incorporating activated carbon into a filter material or between layers of a starch-based filter material and / or a starch-based polymer mixture, a filter element is created in which the advantages of both materials are combined.
- about 5% by volume of natural fibers may be similar to a wick in the filter element, or incorporated therein, and develop a wicking effect, thereby fostering additional filtering out of harmful components from the tobacco smoke.
- Starch foam itself does not emit inhalable, volatile products and can adsorb the optionally released charcoal particles described above.
- starch foam particles or starch fiber particles are harmless to health, since they are biodegradable.
- the starch particles or fibers absorb or bind the moisture.
- the parameters of the starch materials used can be adjusted during their preparation so that the moisture content of respiratory air in the lungs is sufficient to bind or release any starch particles or starch fibers, to which possibly activated carbon particles and toxins adhere, and to solve during exhalation To transport starch particles and fibers together with the breathing air back out of the lungs. Thus, accumulation in the lung upon inhalation of tobacco smoke can be prevented.
- starch materials with thermoplastic properties are used for the production of a filter element, which allow processing after adjustment of the operating conditions, for example in the melt-blown process or spin-flow process.
- Methods which are applicable to the present invention are explained in detail, for example, in EP 861 036.
- high-precision fibers can be discharged as endless filaments by means of extrusion equipment and special nozzles, swirled through air and either drawn (to increase the strength) and then crimped (spin-flow method) or not drawn to form a to achieve a soft, fluffy structure with a large surface area (melt-blown process).
- the extruded fibers are first spun and made into a Bundled fiber bundles and formed after drawing by compression rollers to form an endless filter.
- a final shaping takes place in a configuration system, wherein the endless filter is optionally fed again to an upsetting, crimping machine and processed in a filter rod machine to form individual filter sections.
- starch foam 20 from a starting mixture 2 of starch, preferably native potato starch, and plasticizing and film-forming additives by thermal and mechanical energy input compressed, optionally modified, plasticized and expanded by temperature and pressure drop and in compressed a compression step, wherein it is processed in a calender 22 to an endless filter 7.
- a foamed round profile with a diameter of 10 mm is produced and calibrated in the formatting process to a diameter of 7.8 mm.
- the specific density of the foam filter strand is z. B. about 12 kg / m 3 .
- the extruded starch foam 20 is substantially open-pored so that the frothed destructured starch filter material having a crystalline content of less than 5% is capable of adsorbing the liquids and liquid contaminants contained in the tobacco smoke such as condensate and tar products Starch foam itself emits no inhalable, volatile products in the tobacco smoke.
- the endless filter is cut into filter sections and into a filter element or cigarette filter with a stacked structure of starch-based filter sections optionally in alternation with activated carbon layers (as in US Pat Figure 3 shown) processed.
- an extrudate is formed with air-permeable configuration, a large area is possible for the air permeability. So can the extrudate in the be formed substantially porous, so that a high air permeability is expected. Likewise, the extrudate can partially closed-pored and the air permeability be correspondingly low.
- additional filter channels of appropriate number and size can be introduced
- the filter channels can be introduced by needling, water jets or laser beam in a filter material made of a starch material.
- a filter material made of a starch material In a layered filter element (round filter rod), the thickness of each filter layer of starch material and possibly activated carbon and the laser depth, which corresponds to the channel length, are matched.
- a filter material made of a foamed starch material can be open-pored, additionally introduced filter channels can enhance the advantageous properties, such as the adhesion properties, of this filter material.
- a filter material of starch polymer fibers has improved adhesion properties of the pollutant particles to be filtered in the tobacco smoke.
- a filter material of a fibrous starch material can be cut into staple fibers, wherein the ends of the short fibers protrude, for example, in additionally introduced into the filter material filter channels and so the filter properties can be further improved.
- 3 shows a longitudinal section of a cigarette 10 with a filter element 1, as it is produced according to a method shown in Figure 1, wherein a portion containing tobacco 11 and a section containing the filter element 1 are wrapped and connected with cigarette paper 12 and the filter element and the transition region to the tobacco 11 containing portion are wrapped with another band 13 for reinforcement.
- the filter element 1 is constructed in the form of a stack (cf., FIG. 2), wherein layers of starch foam 20 and layers of activated carbon 21 are arranged alternately.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Networks Using Active Elements (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Glass Compositions (AREA)
Claims (12)
- Elément filtrant pour fabriquer des filtres anti-fumée de tabac avec un matériau filtrant, qui contient sensiblement de l'amidon et/ou un mélange polymère à base d'amidon et présente des pores et/ou des canaux filtrants ouverts dans la direction du flux gazeux, caractérisé en ce que le matériau filtrant est agencé en couches successives alternées d'amidon et/ou d'un mélange polymère à base d'amidon et de charbon actif (21) et en ce que les couches sont agencées empilées transversalement à la direction du flux gazeux.
- Elément filtrant selon la revendication 1, ayant des canaux filtrants de préférence continus sensiblement dans la direction du flux gazeux, le diamètre des canaux filtrants se situant de préférence dans la plage de 50 à 100 µm.
- Elément filtrant selon la revendication 1 ou 2, dans lequel l'amidon et/ou le mélange polymère forme(nt) un matériau de support pour charbon actif (21).
- Elément filtrant selon l'une quelconque des revendications 1 à 3, dans lequel le matériau filtrant formé d'amidon et/ou d'un mélange polymère à base d'amidon est une mousse (20) ou un matériau fibreux.
- Elément filtrant selon la revendication 4, dans lequel la mousse (20) ou le matériau fibreux constitue un matériau de support pour une poudre de charbon actif (21).
- Elément filtrant selon l'une quelconque des revendications 1 à 5, contenant des fibres naturelles comme des fibres de cellulose, du chanvre ou des fibres de coton, de préférence en quantité d'environ 5% en volume.
- Procédé de fabrication d'un élément filtrant selon l'une quelconque des revendications 1 à 6, avec les étapes suivantes :a) l'acheminement continu d'un mélange dosé d'amidon et/ou d'un mélange polymère à base d'amidon ainsi que d'autres additifs dans une extrudeuse,b) le chauffage et le malaxage du mélange en régime de température et de pression défini pour réaliser un bain en fusion,c) l'extrusion du bain en fusion à travers une tuyère,d) la réalisation d'un extrudat avec configuration perméable à l'air ;e) la compression de l'extrudat et la réalisation d'un matériau filtrant sous la forme d'un filtre sans fin (7),f) la séparation du matériau filtrant extrudé en sections etg) la réalisation d'un élément filtrant (1) à partir d'au moins un segment de matériau filtrant.
- Procédé de fabrication d'un élément filtrant selon l'une quelconque des revendications 1 à 6 avec les étapes suivantes :a) l'acheminement en continu d'un mélange dosé d'amidon et/ou d'un mélange polymère à base d'amidon ainsi que d'autres additifs dans une extrudeuse,b) le chauffage et malaxage du mélange à un régime défini de température et de pression pour réaliser un bain en fusion,c) l'extrusion du bain en fusion à travers une tuyère,d) la réalisation d'un extrudat avec une configuration perméable à l'air,e) la compression de l'extrudat et la réalisation d'un matériau filtrant sous la forme de filtre sans fin (7),f) la séparation du matériau filtrant extrudé en sections etg) la réalisation d'un élément filtrant (1) à partir de deux ou plusieurs segments de matériau filtrant et avec, respectivement, une couche de charbon actif (21) entre des couches de matériau filtrant successives.
- Procédé selon la revendication 7 ou 8, dans lequel on ménage, avant la réalisation de l'élément filtrant (1), des canaux filtrants dans les segments de matériau filtrant.
- Procédé selon la revendication 9, dans lequel les canaux filtrants sont réalisés par des jets d'eau, des aiguilles ou par rayon laser.
- Procédé selon l'une quelconque des revendication 7 à 10, dans lequel le matériau filtrant est constitué de mousse d'amidon, de feuilles biopolymères ou de fibres polymères d'amidon.
- Procédé selon l'une quelconque des revendication 7 à 11, dans lequel les autres additifs sont l'alcool polyvinylique, un polyesteramide et/ou un pôlyesteruréthanne, l'acide polylactique (PLB), l'acide polyhydroxybutyrique (PHB), un adjuvant d'écoulement ainsi qu'éventuellement un agent gonflant.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10252823A DE10252823A1 (de) | 2002-11-13 | 2002-11-13 | Filterelement |
DE10252823 | 2002-11-13 | ||
PCT/EP2003/011493 WO2004043174A2 (fr) | 2002-11-13 | 2003-10-16 | Element filtrant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1567025A2 EP1567025A2 (fr) | 2005-08-31 |
EP1567025B1 true EP1567025B1 (fr) | 2006-04-12 |
Family
ID=32308529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03775194A Expired - Lifetime EP1567025B1 (fr) | 2002-11-13 | 2003-10-16 | Element filtrant |
Country Status (11)
Country | Link |
---|---|
US (1) | US7762267B2 (fr) |
EP (1) | EP1567025B1 (fr) |
JP (1) | JP4242347B2 (fr) |
AT (1) | ATE322842T1 (fr) |
AU (1) | AU2003283273A1 (fr) |
CA (1) | CA2502426A1 (fr) |
DE (2) | DE10252823A1 (fr) |
DK (1) | DK1567025T3 (fr) |
ES (1) | ES2257697T3 (fr) |
PT (1) | PT1567025E (fr) |
WO (1) | WO2004043174A2 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8851084B2 (en) | 2011-07-19 | 2014-10-07 | British American Tobacco (Investments) Limited | Cellulose acetate compositions |
US9241512B2 (en) | 2011-06-23 | 2016-01-26 | British American Tobacco (Investments) Limited | Filter material comprising polylactide fibres |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007025858A1 (de) * | 2007-06-01 | 2008-12-04 | Grünenthal GmbH | Verfahren zur Herstellung einer Arzneimitteldarreichungsform |
US9226524B2 (en) | 2010-03-26 | 2016-01-05 | Philip Morris Usa Inc. | Biopolymer foams as filters for smoking articles |
GB201007946D0 (en) * | 2010-05-12 | 2010-06-30 | British American Tobacco Co | Filter additive |
DE102011050769A1 (de) * | 2011-05-31 | 2012-12-06 | Sven Pracht | Filterelement und Filter für Rauchwaren sowie ein Verfahren zum Herstellen des Filterelementes |
CN102511929A (zh) * | 2011-11-10 | 2012-06-27 | 云南正邦生物技术有限公司 | 一种通风固形复合嘴棒及其制备方法 |
CN102613702A (zh) * | 2012-03-30 | 2012-08-01 | 邓加德 | 能减少香烟焦油吸入量的滤嘴香烟 |
PL223115B1 (pl) * | 2013-02-15 | 2016-10-31 | Int Tobacco Machinery Poland Spółka Z Ograniczoną Odpowiedzialnością | Sposób, mechanizm i urządzenie do chwilowego kompresowania materiału filtracyjnego |
CN203388263U (zh) * | 2013-06-26 | 2014-01-15 | 刘秋明 | 电子烟、电子烟雾化器及电子烟吸嘴 |
CN105011365A (zh) * | 2014-04-18 | 2015-11-04 | 罗哲浩 | 一种香烟过滤剂 |
CN106418679B (zh) * | 2016-10-26 | 2020-06-16 | 中国烟草总公司郑州烟草研究院 | 一种设有多孔材料的卷烟 |
IT201800003381A1 (it) * | 2018-03-08 | 2019-09-08 | Hsd Holding Smart Device S R L | Un assieme di ventilazione |
CN109864335B (zh) * | 2019-03-06 | 2024-07-05 | 福建绿色黄金生物科技有限公司 | 过滤棒及香烟 |
EP4360474A3 (fr) * | 2019-05-17 | 2024-08-14 | Japan Tobacco Inc. | Tige de tabac pour inhalateur d'arôme |
CN110670165B (zh) * | 2019-09-29 | 2022-04-15 | 孔令孝 | 一种聚乳酸卷烟丝束、制备方法及其应用 |
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DE1161447B (de) * | 1959-06-12 | 1964-01-16 | Aquafilter Corp | Filter fuer Tabakrauch |
US3438381A (en) * | 1967-02-01 | 1969-04-15 | Edith A Hale | Filter for tobacco products |
DE6940959U (de) | 1969-10-21 | 1970-02-05 | Stahl & Wuerthner Kg | Zusammenklappbares bett |
NL7712441A (nl) * | 1977-11-11 | 1979-05-15 | Laurens Sigaretten | Sigarettefilter en filtersigaret. |
JPS5554888A (en) * | 1978-10-13 | 1980-04-22 | Takeyoshi Yamaguchi | Tobacco filter |
NO154418C (no) | 1978-11-30 | 1986-09-17 | Siren M J O | Filtermateriale. |
US4411280A (en) * | 1981-09-11 | 1983-10-25 | Celanese Corporation | Ventilated thermoplastic polymer foam filter rods |
GB8308020D0 (en) * | 1982-03-31 | 1983-04-27 | Filtrona Ltd | Tobacco smoke filter |
US5523036A (en) | 1987-05-28 | 1996-06-04 | British-American Tobacco Company Limited | Methods of making tobacco smoke filter elements |
GB8712617D0 (en) * | 1987-05-28 | 1987-07-01 | British American Tobacco Co | Tobacco smoke filters |
US5019262A (en) * | 1989-10-06 | 1991-05-28 | International Applied Sciences, Inc. | Hydrophilic microporous membrane |
DE4136694C2 (de) | 1991-11-07 | 1996-10-10 | Inventa Ag | Stärkefaser oder Stärke-modifizierte Faser, Verfahren zu ihrer Herstellung sowie ihre Verwendung |
GB9305066D0 (en) | 1993-03-12 | 1993-04-28 | British American Tobacco Co | Improvements relating to filtration materials |
US5404890A (en) * | 1993-06-11 | 1995-04-11 | R. J. Reynolds Tobacco Company | Cigarette filter |
CA2127817C (fr) * | 1993-07-13 | 2007-07-03 | Hitoshi Tsugaya | Filtres a tabac et methode pour leur production |
US5435326A (en) * | 1993-07-27 | 1995-07-25 | R. J. Reynolds Tobacco Company | Controlled delivery smoking article and method |
US5497793A (en) * | 1993-09-22 | 1996-03-12 | Kubica; Stephen A. | Cigarette and soluble cigarette filter therefor |
GB9325536D0 (en) * | 1993-12-14 | 1994-02-16 | Rothmans International Ltd | Smoking article and filter therefor |
DE19536505A1 (de) * | 1995-09-29 | 1997-04-10 | Biotec Biolog Naturverpack | Biologisch abbaubares Filtermaterial und Verfahren zu seiner Herstellung |
US5709227A (en) | 1995-12-05 | 1998-01-20 | R. J. Reynolds Tobacco Company | Degradable smoking article |
US5896860A (en) * | 1997-12-03 | 1999-04-27 | Lockett; Wilson Ira | Smoking filter |
US6779529B2 (en) * | 2001-08-01 | 2004-08-24 | Brown & Williamson Tobacco Corporation | Cigarette filter |
US6814786B1 (en) * | 2003-04-02 | 2004-11-09 | Philip Morris Usa Inc. | Filters including segmented monolithic sorbent for gas-phase filtration |
-
2002
- 2002-11-13 DE DE10252823A patent/DE10252823A1/de not_active Withdrawn
-
2003
- 2003-10-16 AU AU2003283273A patent/AU2003283273A1/en not_active Abandoned
- 2003-10-16 WO PCT/EP2003/011493 patent/WO2004043174A2/fr active IP Right Grant
- 2003-10-16 PT PT03775194T patent/PT1567025E/pt unknown
- 2003-10-16 CA CA002502426A patent/CA2502426A1/fr not_active Abandoned
- 2003-10-16 AT AT03775194T patent/ATE322842T1/de active
- 2003-10-16 US US10/533,996 patent/US7762267B2/en not_active Expired - Fee Related
- 2003-10-16 DE DE50302987T patent/DE50302987D1/de not_active Expired - Lifetime
- 2003-10-16 DK DK03775194T patent/DK1567025T3/da active
- 2003-10-16 JP JP2004550699A patent/JP4242347B2/ja not_active Expired - Fee Related
- 2003-10-16 ES ES03775194T patent/ES2257697T3/es not_active Expired - Lifetime
- 2003-10-16 EP EP03775194A patent/EP1567025B1/fr not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9241512B2 (en) | 2011-06-23 | 2016-01-26 | British American Tobacco (Investments) Limited | Filter material comprising polylactide fibres |
US8851084B2 (en) | 2011-07-19 | 2014-10-07 | British American Tobacco (Investments) Limited | Cellulose acetate compositions |
Also Published As
Publication number | Publication date |
---|---|
ES2257697T3 (es) | 2006-08-01 |
CA2502426A1 (fr) | 2004-05-27 |
JP4242347B2 (ja) | 2009-03-25 |
US7762267B2 (en) | 2010-07-27 |
DK1567025T3 (da) | 2006-07-17 |
ATE322842T1 (de) | 2006-04-15 |
AU2003283273A1 (en) | 2004-06-03 |
WO2004043174A2 (fr) | 2004-05-27 |
PT1567025E (pt) | 2006-08-31 |
WO2004043174A3 (fr) | 2004-10-14 |
DE50302987D1 (de) | 2006-05-24 |
US20060124145A1 (en) | 2006-06-15 |
EP1567025A2 (fr) | 2005-08-31 |
JP2006506061A (ja) | 2006-02-23 |
DE10252823A1 (de) | 2004-06-09 |
AU2003283273A8 (en) | 2004-06-03 |
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