HRP20000417A2 - Biodegradable filter for cigarettes - Google Patents
Biodegradable filter for cigarettes Download PDFInfo
- Publication number
- HRP20000417A2 HRP20000417A2 HR20000417A HRP20000417A HRP20000417A2 HR P20000417 A2 HRP20000417 A2 HR P20000417A2 HR 20000417 A HR20000417 A HR 20000417A HR P20000417 A HRP20000417 A HR P20000417A HR P20000417 A2 HRP20000417 A2 HR P20000417A2
- Authority
- HR
- Croatia
- Prior art keywords
- filter according
- binder
- filter
- cellulose non
- woven mass
- Prior art date
Links
- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 16
- 229920002678 cellulose Polymers 0.000 claims abstract description 13
- 239000001913 cellulose Substances 0.000 claims abstract description 10
- 235000019505 tobacco product Nutrition 0.000 claims abstract 2
- 239000011230 binding agent Substances 0.000 claims description 12
- 229920000126 latex Polymers 0.000 claims description 4
- 239000004816 latex Substances 0.000 claims description 4
- 229920001353 Dextrin Polymers 0.000 claims description 2
- 239000004375 Dextrin Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 235000019425 dextrin Nutrition 0.000 claims description 2
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 2
- 239000011118 polyvinyl acetate Substances 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 1
- 239000005977 Ethylene Substances 0.000 claims 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims 1
- 229920001577 copolymer Polymers 0.000 claims 1
- 229920003169 water-soluble polymer Polymers 0.000 claims 1
- 239000004745 nonwoven fabric Substances 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 8
- 229920002301 cellulose acetate Polymers 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 description 4
- 235000010980 cellulose Nutrition 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 241000221931 Hypomyces rosellus Species 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000001087 glyceryl triacetate Substances 0.000 description 2
- 235000013773 glyceryl triacetate Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229960002622 triacetin Drugs 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 230000003655 tactile properties Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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
- A24D3/08—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Nonwoven Fabrics (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Biological Depolymerization Polymers (AREA)
- Paper (AREA)
- Filtering Materials (AREA)
Abstract
Description
Ovaj izum odnosi se na biorazgradivi filtar dan preambulom prvog patentnog zahtjeva. This invention relates to the biodegradable filter given in the preamble of the first patent claim.
S ekološkog gledišta, papirni filtri predstavljaju optimalno rješenje za cigarete. Nažalost, mali uspjeh čistih papirnih filtra proizlazi iz nekoliko svojstava materijala tipičnih za papir. From an ecological point of view, paper filters are the optimal solution for cigarettes. Unfortunately, the limited success of pure paper filters stems from several material properties typical of paper.
Glavni problem papirnih filtra je razlika u okusu dima u usporedbi sa konvencionalnim filtrima za cigarete od celuloznog acetata. Daljnji problemi proizlaze iz različitog zadržavanja, kvarenja u čvrstoći za isto zadržavanje, granulasto-porozna strukura odrezane površine presjeka filtra u usporedi sa filtrom od celuloznog acetata. The main problem with paper filters is the difference in smoke flavor compared to conventional cellulose acetate cigarette filters. Further problems arise from different retention, deterioration in strength for the same retention, granular-porous structure of the cut cross-sectional area of the filter compared to a cellulose acetate filter.
Ti problemi dovode da pušači odbacuju cigarete sa papirnim filtrom na bazi okusa, pojave i dodira. These problems lead smokers to reject cigarettes with a paper filter based on taste, appearance and touch.
Glavna posljedica toga svega vidi se u različitoj formi korištenih materijala. Papir se pojavljuje u obliku vunaste mase ili listova, a celulozni acetat u formi vlakana. Svi pokušaji da se drugačijim procesnim postupcima, primjerice, formiranjem ili pletenjem vunaste mase za veći ili manji stupanj kako bi se postigla optička i taktilna svojstva kao kod celuloznog acetata su popala. Na isti način, do danas nije iznađen postupak kako bi se izmijenila kemijska svojstva zadržavanja papira tako da korespondira sa acetatom. The main consequence of all this can be seen in the different form of the materials used. Paper appears in the form of woolly mass or sheets, and cellulose acetate in the form of fibers. All attempts to achieve the same optical and tactile properties as cellulose acetate by different process procedures, for example, by forming or knitting the wool mass to a greater or lesser degree, have failed. Likewise, to date no process has been invented to alter the chemical retention properties of the paper to match that of acetate.
Kao posljedica tog neriješenog problema, cigarete na način kako se konstruiraju danas sadrže filtere sa papirom i celuloznim segmentom. As a consequence of this unsolved problem, cigarettes as they are constructed today contain filters with paper and a cellulose segment.
Takova verzija je skupa zbog kompliciranih tehnika izrade, i nije još uvijek optimalna sa ekološkog stanovišta. Such a version is expensive due to complicated production techniques, and is still not optimal from an environmental point of view.
Postupak poznat iz EP 0 032 044 B1 za izradu vlaknastog tkanja od nevezano pakiranih vlakana u kojem se suha vlakna uvode u zračnu struju u sito koje zadržava tkanje. Nakon što prođu kroz glavu za oblikovanje i napuste je, vlakna nisu podvrgnuta nikakvoj sili toka, rezultat čega je uglavnom konstantna osnovna težina koja je sačuvana u presjeku samog vlaknastog tkanja. To znači da vlaknasta posteljica može biti izrađena sa jediničom težinom i većom od 70g/m2. Taj postupak je također poznat i pod imenom “air-laid” postupak. Zbog “vunaste mekoće” jasno je da se iz toga ne može izraditi sam cigaretni filtar. The process known from EP 0 032 044 B1 for the production of fibrous webs from loosely packed fibers in which dry fibers are introduced into the air current in a screen that retains the web. After passing through and leaving the forming head, the fibers are not subjected to any flow force, resulting in a generally constant basis weight that is preserved in the cross-section of the fiber weave itself. This means that fiber bedding can be made with a unit weight of more than 70g/m2. This procedure is also known as the "air-laid" procedure. Due to its "woolly softness", it is clear that the cigarette filter itself cannot be made from it.
Dokument EP-A-0 711 512 otkiva cigaretni filtar koji se sastoji uglavnom od celuloznog estera. Tu filterski materijal, kao i celulozni ester mogu sadržavati supstance koje su opisane kao sekundarne ili drugog ranga. Uz te druge supstance koje mogu također biti prisutne, sve pripadaju inter alia prirodnim celulozama. Document EP-A-0 711 512 discloses a cigarette filter consisting mainly of cellulose ester. Here, the filter material, as well as the cellulose ester, may contain substances that are described as secondary or of second rank. In addition to those other substances that may also be present, they all belong inter alia to natural celluloses.
Izum je usmjeren na razvoj monofiltra koji je nesumnjivo bolje biorazgradiv nego onaj od celuloznog acetata, i kao takav bitno je da zadržava utisak ukusa, pojave, tvrdoće i svojstva zadržavanja na način da potrošač ne može isti razlikovati od celuloznog acetata. The invention is aimed at the development of a monofilter that is undoubtedly better biodegradable than that of cellulose acetate, and as such it is important that it retains the impression of taste, appearance, hardness and retention properties in such a way that the consumer cannot distinguish it from cellulose acetate.
Sam izum je dan svojstvima navedenim u karakterističnom dijelu prvog patentnog zahtjeva. The invention itself is given the properties listed in the characteristic part of the first patent claim.
Iznenađujuće, pokazalo se da papir koji je izrađen upotrebom tzv. “air-laid” postupka i dalje procesiran kako bi se napravio filtar na pokazani način odgovara željenom objektu izuma. Surprisingly, it turned out that paper made using the so-called "air-laid" process and further processed to make a filter in the manner shown corresponds to the desired object of the invention.
U tzv. “air-laid” postupku, priređena celulozna vlakna nisu suspendirana u vodi kao u standardnom postupku proizvodnje papira gdje iste prolaze do ploča koje formiraju porozna sita na kojima se celulozna vlakna kondicioniraju tresanjem i mlaćenjem čime se postiže njihovo međusobno mehaničko povezivanje, nego za razliku od opisanog prolaze maksimalno razdvojena u struju zraka koja prenosi iste na polupropusna kontinuirana sita i na kojem se talože na slučajan način. To vodi do dobivanja gotovo pamučaste voluminozne vunaste materije koja ne pokazuje nikakvu mehaničku čvrstoću ni međusobno povezivanje vlakana. Mehanička veza koja je neophodna kako bi se isto dalje procesiralo dobiva se dodavanjem veziva kao što su primjerice polivinil alkohol, polivinil acetat, polimerizirani škrob, dekstrin ili lateks u samu zračnu struju. Gustoća (g/cm3) a time i voluminoznost ili debljina postavlja se naknadnim valjanjem. Površinska gustoća (g/m2) se kontrolira preko brzine kontinuiranih sita ili brzinom uvođenja vlakna u zračnu struju. In the so-called in the "air-laid" process, the prepared cellulose fibers are not suspended in water as in the standard paper production process, where they pass to the plates that form porous screens on which the cellulose fibers are conditioned by shaking and beating, which achieves their mutual mechanical connection, but unlike as described, they are maximally separated in the air current that transfers them to semi-permeable continuous sieves and where they are deposited in a random manner. This leads to obtaining an almost cotton-like voluminous woolen material that does not show any mechanical strength or interconnection of fibers. The mechanical bond that is necessary to process it further is obtained by adding binders such as polyvinyl alcohol, polyvinyl acetate, polymerized starch, dextrin or latex to the air stream itself. The density (g/cm3) and thus the voluminousness or thickness is set by subsequent rolling. The surface density (g/m2) is controlled by the speed of the continuous screens or by the speed of introducing the fiber into the air stream.
Sam izum je objašnjen referencama u opisu i crtežima koji pokazuju: The invention itself is explained with references in the description and drawings showing:
Crtež 1: prikazuje izradu vlaknastog tkanja prema “air-laid” postupku sa linijama rezanja koje se pružaju u uzdužnom smjeru; Drawing 1: shows the production of fibrous weaving according to the "air-laid" process with cutting lines extending in the longitudinal direction;
Crtež 2: prikazuje način savijanja zračnih paučinastih vlaknastih traka; Drawing 2: shows the method of folding air web fiber strips;
Crtež 3: prikazuje spiralno namatanje vlaknastih paučinastih traka sa crteža 2. Drawing 3: shows the spiral winding of fibrous cobweb strips from drawing 2.
Crtež 1 prikazuje vlaknastu paučinu 10 dobivenu upotrebom “air-laid” postupka sa dužinskom težinom od približno 40-50 g/cm2 koja se siječe u n vlaknastih paučinastih traka počevši od linije A-A, sa n=5 u ovom primjeru. Treba naglasiti, da n može biti i drugi broj, 4 ili 6 primjerice, gdje ako je n=4 preferirani broj tada on ne može biti dobro prikazan na crtežu 3 gdje je prikazan spiralni namotaj istih 5 traka. Drawing 1 shows a fibrous web 10 obtained using the air-laid process with a length weight of approximately 40-50 g/cm 2 which is cut into n fibrous web strips starting from line A-A, with n=5 in this example. It should be emphasized that n can be another number, 4 or 6 for example, where if n=4 is the preferred number then it cannot be well shown in drawing 3 where the spiral winding of the same 5 strips is shown.
Pet spomenutih traka 1-5 koje su dobivene uzdužnim zasijecanjem vlaknaste paučine 10 na crtežu 2 su, a prema ovom izumu, prvo savinute u V oblik odgovarajućim uređajem na način kako je pokazano na crtežu 2. Slobodni krajevi savinutih traka u V obliku se polegnu jedan pored drugog i trake se zajedno pridrže odgovarajućim uređajem tako da se vrhovi 14 vlaknastih traka savinutih u V postave u područje oko centralne osi cigaretnog filtra koji se treba izraditi, i tada se smotaju u cilindrično kučište kako je to shematski prikazano na crtežu 3. U stvarnosti, poradi početne kompresije, individualne vlaknaste trake 1-5 leže tako čvrsto stisnute zajedno nakon što se izvede spiralno namatanje prema crtežu 3 tako da se stječe utisak da je dobiveno napravljeno od homogenog materijala, tako da zatvoreni filtar izglede na usnoj strani kao i kraj napravljen kod acetatnog filtra. Drugim riječima, zbog “vunaste mekoće” materijala, na istom nije moguće zapaziti da je napravljen od nekoliko slojeva vlaknastih paučinastih traka koje su smotane zajedno u spiralu prikazanu kao na crtežu 3. The five aforementioned strips 1-5 obtained by longitudinally cutting the fibrous web 10 in drawing 2 are, according to the present invention, first folded into a V shape by a suitable device in the manner shown in drawing 2. The free ends of the folded strips in a V shape are laid one by one next to each other and the strips are held together by a suitable device so that the tips of the 14 V-bent fiber strips are placed in the area around the central axis of the cigarette filter to be made, and then rolled into a cylindrical housing as shown schematically in Figure 3. In reality , due to the initial compression, the individual fiber strips 1-5 lie so firmly pressed together after the spiral winding according to drawing 3 is carried out that it gives the impression of being made of a homogeneous material, so that the closed filter looks on the lip side like the end made at the acetate filter. In other words, due to the "woolly softness" of the material, it is not possible to notice on the same that it is made of several layers of fibrous cobweb strips that are rolled together in a spiral shown as in drawing 3.
Omotane vlaknaste trake 1-5 će se prema crtežu 3 držati zajedno na uobičajen način sa filtarskim pokrivnim papirom 12 na način da papirni filtar u skladu sa ovim izumom podražava pojavu kao kod onoga od celuloznog acetata kad je takav filtar zgotovljen. The wrapped fiber strips 1-5 will be held together in the usual manner with the filter cover paper 12 according to drawing 3 so that the paper filter in accordance with the present invention mimics the appearance of that of cellulose acetate when such a filter is made.
Primjeri: Examples:
Cigaretni primjeri prikazani u slijedećoj tablici napravljeni su radi usporedbe: The cigarette examples shown in the following table are made for comparison:
[image] [image]
AB = American Blend (smjesa) AB = American Blend
ET = ekspandirani duhan ET = expanded tobacco
Slijedeće specifikacije korištene su za filtarski materijal: The following specifications were used for the filter material:
Acetat 3.0 y/35000 HC sa 7% triacetinskim otpuštanjem Acetate 3.0 y/35000 HC with 7% triacetin release
Acetat 2,1 y/36000 SSC sa /% triacetinskim otpuštanjem Acetate 2.1 y/36000 SSC with /% triacetin release
Air-laid B+D 48 g/m2, sa lateks vezivom i približno 0,8 mm debljine Air-laid B+D 48 g/m2, with latex binder and approximately 0.8 mm thick
E 70 g/m2, sa lateks vezivom i približno 1,1 mm debljine E 70 g/m2, with latex binder and approximately 1.1 mm thick
U ovoj specifikaciji HC stoji za eng. high crimp, a SSC za eng. superstrong crimp, odnosno HC za jako stegnuto, a SSC za vrlo jako stegnuto. In this specification, HC stands for Eng. high crimp, and SSC for Eng. superstrong crimp, i.e. HC for strongly crimped, and SSC for very strongly crimped.
Rezultati: The results:
Analitički i fizikalno određeni parametri dobiveni su prema važećim DIN/ISO normama i ne pokazuju razlike unutar okvira mjerne greške. Evaluacija okusa izvršena je uz pomoć 15 treniranih pušača i nije dala bitnije razlike u postupku usporedbe parova. Analytical and physically determined parameters were obtained according to valid DIN/ISO standards and do not show differences within the measurement error. The taste evaluation was carried out with the help of 15 trained smokers and did not show significant differences in the pairwise comparison procedure.
Biorazgradivost cigaretnog filtarskog materijala izrađenog prema izumu na vremenskoj skali u usporedbi prema običom cigaretnom celuloznom filtru je neusporediva. Industrijska evaluacija biorazgradivosti vrši se prema tzv. “Sturm testu” i opisana je u R. N. Sturm u J. Americ. Oil Chemists’ Soc. 50 (1973) Svibanj, str. 159-167 u članku “Biorazgradivost neionskih surfaktanata: probni test za predviđanje brzine i konačne razgradivosti.” The biodegradability of the cigarette filter material made according to the invention on a time scale compared to a regular cigarette cellulose filter is incomparable. The industrial evaluation of biodegradability is carried out according to the so-called "Sturm test" and is described in R. N. Sturm in J. Americ. Oil Chemists' Soc. 50 (1973) May, p. 159-167 in the article "Biodegradability of nonionic surfactants: a pilot test to predict rate and ultimate degradability."
Claims (14)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19753195A DE19753195A1 (en) | 1997-11-21 | 1997-11-21 | Biologically decomposable filter for cigarettes |
| PCT/EP1998/007121 WO1999026496A2 (en) | 1997-11-21 | 1998-11-10 | Biodegradable filter for cigarettes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| HRP20000417A2 true HRP20000417A2 (en) | 2001-12-31 |
| HRP20000417B1 HRP20000417B1 (en) | 2006-06-30 |
Family
ID=7850358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HR20000417A HRP20000417B1 (en) | 1997-11-21 | 2000-06-21 | Biodegradable filter for cigarettes |
Country Status (25)
| Country | Link |
|---|---|
| EP (1) | EP1032282B1 (en) |
| JP (1) | JP2001523478A (en) |
| KR (1) | KR20010015833A (en) |
| CN (1) | CN1287697C (en) |
| AT (1) | ATE243949T1 (en) |
| AU (1) | AU2152599A (en) |
| BG (1) | BG64687B1 (en) |
| CZ (1) | CZ297655B6 (en) |
| DE (2) | DE19753195A1 (en) |
| EA (1) | EA001848B1 (en) |
| EE (1) | EE200000269A (en) |
| ES (1) | ES2201570T3 (en) |
| HK (1) | HK1033247A1 (en) |
| HR (1) | HRP20000417B1 (en) |
| HU (1) | HU224871B1 (en) |
| NO (1) | NO20002553L (en) |
| OA (1) | OA11413A (en) |
| PL (1) | PL187199B1 (en) |
| PT (1) | PT1032282E (en) |
| SK (1) | SK284074B6 (en) |
| TR (1) | TR200001450T2 (en) |
| TW (1) | TW575405B (en) |
| UA (1) | UA70934C2 (en) |
| WO (1) | WO1999026496A2 (en) |
| YU (1) | YU49401B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HUP0203227A3 (en) | 1999-02-26 | 2003-02-28 | Reemtsma H F & Ph | Smokable product |
| DE10115120A1 (en) | 2001-03-27 | 2002-10-02 | Hauni Maschinenbau Ag | Method and appliance for producing filters comprise two cutters, two rollers, bobbin, two guides with openings for strips |
| DE102004042809A1 (en) * | 2004-09-03 | 2006-03-23 | Reemtsma Cigarettenfabriken Gmbh | Process for producing filters for tobacco products |
| US7479098B2 (en) | 2005-09-23 | 2009-01-20 | R. J. Reynolds Tobacco Company | Equipment for insertion of objects into smoking articles |
| DE102009016148A1 (en) * | 2009-04-03 | 2010-10-14 | Mcairlaid's Vliesstoffe Gmbh & Co. Kg | Filter material for cleaning air and gases |
| CN101919592B (en) * | 2009-06-12 | 2012-05-23 | 佳木斯合成实业有限责任公司 | Wooden fiber paper adhesive-applied filter rod for cigarettes and preparation method thereof |
| US20110180084A1 (en) * | 2010-01-27 | 2011-07-28 | R.J. Reynolds Tobacco Company | Apparatus and associated method for forming a filter component of a smoking article |
| US10064429B2 (en) | 2011-09-23 | 2018-09-04 | R.J. Reynolds Tobacco Company | Mixed fiber product for use in the manufacture of cigarette filter elements and related methods, systems, and apparatuses |
| EP2712510B1 (en) * | 2012-09-28 | 2016-03-02 | Reemtsma Cigarettenfabriken GmbH | Smoking article |
| DE102016105235B4 (en) * | 2016-03-21 | 2019-02-14 | Delfortgroup Ag | Improved filter paper for cigarette filters, its manufacture and filter cigarette |
| KR101976325B1 (en) * | 2018-07-06 | 2019-05-07 | 주식회사 케이티앤지 | Cigarette filter reducing smoke constituent, cigarette, and manufacturing method thereof |
| DE102022102066A1 (en) * | 2022-01-28 | 2023-08-03 | Delfortgroup Ag | SMOKING ARTICLE SEGMENT WITH CALENDED FIBRE WEB |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1562134A (en) * | 1976-10-06 | 1980-03-05 | Celanese Corp | Filter material |
| AU537637B2 (en) | 1979-12-21 | 1984-07-05 | Kimberly-Clark Corporation | Dry laid weds |
| US4375448A (en) * | 1979-12-21 | 1983-03-01 | Kimberly-Clark Corporation | Method of forming a web of air-laid dry fibers |
| JPS59174670A (en) * | 1983-03-24 | 1984-10-03 | Daihachi Kagaku Kogyosho:Kk | Binder for cellulose acetate fiber |
| US4813948A (en) * | 1987-09-01 | 1989-03-21 | Minnesota Mining And Manufacturing Company | Microwebs and nonwoven materials containing microwebs |
| JP3420359B2 (en) * | 1994-10-21 | 2003-06-23 | ダイセル化学工業株式会社 | Filter material for tobacco smoke, fibrous cellulose ester and method for producing the same |
| DE19609143C1 (en) * | 1996-03-08 | 1997-11-13 | Rhodia Ag Rhone Poulenc | Melt-blown fleece, process for its production and its uses |
-
1997
- 1997-11-21 DE DE19753195A patent/DE19753195A1/en not_active Ceased
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1998
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- 1998-11-10 AT AT98965660T patent/ATE243949T1/en active
- 1998-11-10 JP JP2000521713A patent/JP2001523478A/en active Pending
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- 1998-11-10 SK SK741-2000A patent/SK284074B6/en not_active IP Right Cessation
- 1998-11-10 EP EP98965660A patent/EP1032282B1/en not_active Expired - Lifetime
- 1998-11-10 CZ CZ20001828A patent/CZ297655B6/en not_active IP Right Cessation
- 1998-11-10 UA UA2000063572A patent/UA70934C2/en unknown
- 1998-11-10 WO PCT/EP1998/007121 patent/WO1999026496A2/en active IP Right Grant
- 1998-11-10 PL PL98341089A patent/PL187199B1/en unknown
- 1998-11-10 ES ES98965660T patent/ES2201570T3/en not_active Expired - Lifetime
- 1998-11-10 AU AU21525/99A patent/AU2152599A/en not_active Abandoned
- 1998-11-10 YU YU30800A patent/YU49401B/en unknown
- 1998-11-10 HU HU0004346A patent/HU224871B1/en not_active IP Right Cessation
- 1998-11-10 KR KR1020007005576A patent/KR20010015833A/en active IP Right Grant
- 1998-11-10 DE DE59808927T patent/DE59808927D1/en not_active Expired - Lifetime
- 1998-11-10 CN CNB988113759A patent/CN1287697C/en not_active Expired - Fee Related
- 1998-11-10 EE EEP200000269A patent/EE200000269A/en unknown
- 1998-11-10 EA EA200000550A patent/EA001848B1/en not_active IP Right Cessation
- 1998-11-20 TW TW87119276A patent/TW575405B/en not_active IP Right Cessation
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2000
- 2000-05-18 NO NO20002553A patent/NO20002553L/en not_active Application Discontinuation
- 2000-05-19 OA OA1200000149A patent/OA11413A/en unknown
- 2000-06-20 BG BG104548A patent/BG64687B1/en unknown
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2001
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