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WO1993007771A1 - Cigarette filter - Google Patents

Cigarette filter Download PDF

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Publication number
WO1993007771A1
WO1993007771A1 PCT/AT1992/000126 AT9200126W WO9307771A1 WO 1993007771 A1 WO1993007771 A1 WO 1993007771A1 AT 9200126 W AT9200126 W AT 9200126W WO 9307771 A1 WO9307771 A1 WO 9307771A1
Authority
WO
WIPO (PCT)
Prior art keywords
cellulose
acetate
diameter
cable
fibers
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.)
Ceased
Application number
PCT/AT1992/000126
Other languages
German (de)
French (fr)
Inventor
Hubert Klus
Günther HAYN
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.)
Austria Tabakwerke AG
Original Assignee
Austria Tabakwerke AG
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
Priority to UA94005431A priority Critical patent/UA27822C2/en
Priority to KR1019940701133A priority patent/KR100264527B1/en
Priority to AT92921347T priority patent/ATE135892T1/en
Priority to GEAP19922490A priority patent/GEP19991509B/en
Priority to JP5507272A priority patent/JPH07500385A/en
Priority to RU9294021652A priority patent/RU2083146C1/en
Application filed by Austria Tabakwerke AG filed Critical Austria Tabakwerke AG
Priority to EP92921347A priority patent/EP0609284B1/en
Priority to DE59205875T priority patent/DE59205875D1/en
Priority to CA002121136A priority patent/CA2121136C/en
Publication of WO1993007771A1 publication Critical patent/WO1993007771A1/en
Anticipated expiration legal-status Critical
Priority to GR960400815T priority patent/GR3019451T3/en
Ceased legal-status Critical Current

Links

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
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
    • 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
    • A24D3/067—Use of materials for tobacco smoke filters characterised by functional properties
    • A24D3/068—Biodegradable or disintegrable
    • 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
    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • 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

Definitions

  • Modern cigarette filters are almost exclusively made from cellulose (2.5) acetate. Compared to the paper and cotton filters used previously, this material offers the advantage that the cable used for filter production can be manufactured in a variety of specifications, in particular with regard to the fiber cross section, and is easy to process into filters, which in turn are used for snowing cigarette makers generating machines can be used.
  • the filters made from cellulose acetate also look good when smoked.
  • the "hardener" triazetin (glycerol triacetate) or triethylene glycol diacetate added to the cable (not already the fibers) when producing the filter rods give the filter a high selectivity towards some health-threatening ingredients of tobacco smoke, such as phenols and N-nitrosamines.
  • Di- and trisaccharides, alkali and alkaline earth salts of organic and some mineral acids e.g. magnesium chloride, magnesium sulfate, sodium chloride, sodium sulfate, etc.
  • organic and some mineral acids e.g. magnesium chloride, magnesium sulfate, sodium chloride, sodium sulfate, etc.
  • starch chemical or biologically partially degraded starch, starch derivatives, starch-containing products such as cereal flour, dextrins are suspended in the spinning solution, these additives are broken down by soil microorganisms in sewage treatment plants, etc.
  • soil microorganisms in sewage treatment plants, etc.
  • the structure of the individual fibers of the smoked cigarette filters is destroyed and the further microbiological degradation of the remaining cellulose (2,5) acetate is facilitated and accelerated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Artificial Filaments (AREA)
  • Filtering Materials (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

Described are methods of manufacturing a cellulose-acetate bundle, the filaments making up the bundle being produced by extruding a solution containing, in addition to cellulose-(2,5)-acetate and solvent, non-toxic compounds which are only slightly soluble in the solution and whose molecular diameter is at least 30 % less than the diameter of the filaments. Water-soluble or bacteriologically degradable organic compounds, in particular starch, starch derivatives or dextrins, are used as the additives.

Description

Zigarettenfilter Cigarette filter

Moderne Zigarettenfilter werden fast ausschließlich aus Zellulose-(2,5)-azetat erzeugt. Gegenüber den früher verwendeten Papier- und Wattefiltern bietet dieses Material den Vorteil, daß das zur Filterherstellung dienende Kabel in einer Vielfalt von Spezifikationen, insbesondere hinsichtlich des Faserquerschnitts, herge¬ stellt werden kann und leicht zu Filtern zu verarbeiten ist, die ihrerseits bei schneilaufenden Zigarettener¬ zeugungsmaschinen verwendet werden können. Die aus Zelluloseazetat hergestellten Filter sehen auch in berauchtem Zustand gut aus. Die dem Kabel (nicht schon den Fasern) bei der Erzeugung der Filterstäbchen zuge- gebenen "Härter" Triazetin (Glyzerintriazetat) bzw. Triäthylenglykoldiazetat verleihen dem Filter hohe Selektivität gegenüber einigen gesundheitlich bedenk¬ lichen Inhaltsstoffen des Tabakrauchs, wie Phenolen und N-Nitrosaminen.Modern cigarette filters are almost exclusively made from cellulose (2.5) acetate. Compared to the paper and cotton filters used previously, this material offers the advantage that the cable used for filter production can be manufactured in a variety of specifications, in particular with regard to the fiber cross section, and is easy to process into filters, which in turn are used for snowing cigarette makers generating machines can be used. The filters made from cellulose acetate also look good when smoked. The "hardener" triazetin (glycerol triacetate) or triethylene glycol diacetate added to the cable (not already the fibers) when producing the filter rods give the filter a high selectivity towards some health-threatening ingredients of tobacco smoke, such as phenols and N-nitrosamines.

Der Nachteil dieses Materials gegenüber chemisch nicht modifizierter Zellulose ist durch seine langsame Abbau- barkeit durch Mikroorganismen gegeben. Nach neueren Forschungsarbeiten wird reines Zellulose-(2,5)-azetat in der Form von Filterstäbchen bei einer Kompostierung unter optimalen Bedingungen in rund 6 bis 9 Monaten durch Mikroorganismen abgebaut, im wässrigen Medium von Kläranlagen ist mit 12 bis 15 Monaten zu rechnen. Erschwert wird dieser Abbau durch die Kompaktheit der Filter, durch die Beigabe der oben erwähnten "Härter" sowie durch ihr adsorbiertes Tabak-Rauchkondensat.The disadvantage of this material compared to chemically unmodified cellulose is its slow degradability by microorganisms. According to recent research, pure cellulose (2.5) acetate in the form of filter sticks is degraded by microorganisms in around 6 to 9 months during composting under optimal conditions; in the aqueous medium of sewage treatment plants, 12 to 15 months can be expected. This degradation is made more difficult by the compactness of the filters, by the addition of the "hardeners" mentioned above and by their adsorbed tobacco smoke condensate.

Man kann davon ausgehen, daß, bedingt durch diese rela¬ tiv langen Abbauzeiten bei der Kompostierung und in Kläranlagen, das Problem "Umweltbelastung durch Ziga¬ rettenfilter" derzeit nicht gelöst ist. Unter möglichst vollständiger Beibehaltung der Vorteile derzeit üblicher Zelluloseazetatfilter sollen diese derart modifiziert werden, daß der mikrobielle Abbau gegenüber dem in der jünsten einschlägigen Literatur angegebenen Zeitbedarf deutlich beschleunigt wird.It can be assumed that, due to these relatively long breakdown times in composting and in sewage treatment plants, the problem of "environmental pollution caused by cigarette filters" has not yet been solved. While maintaining the advantages of currently available cellulose acetate filters as completely as possible, they should be modified in such a way that the microbial degradation is significantly accelerated compared to the time required in the most recent relevant literature.

Die gestellte Aufgabe wird gelöst, wenn Zigaretten¬ filter unter Verwendung von Kabeln hergestellt werden, welche nach den Verfahren gemäß Patentanspruch 1 oder 2 hergestellt worden sind.The object is achieved when cigarette filters are manufactured using cables which have been produced by the method according to claim 1 or 2.

Als erfindungsgemäß einsetzbare wasserlösliche Materia¬ lien kommen Di- und Trisaccharide, Alkali- und Erdalka- lisalze organischer und einiger Mineralsäuren (z.B. Magnesiumchlorid, Magnesiumsulfat, Natriumchlorid, Natriumsulfat, etc.) in Frage.Di- and trisaccharides, alkali and alkaline earth salts of organic and some mineral acids (e.g. magnesium chloride, magnesium sulfate, sodium chloride, sodium sulfate, etc.) are suitable as water-soluble materials which can be used according to the invention.

Unter dem Einfluß von Feuchtigkeit wird das wasser- lösliche Material aus den Zigarettenfiltern heraus¬ gelöst und somit die Struktur der Einzelfasern zer¬ stört. Die sich dabei ergebende große Oberfläche der zurückbleibenden Faserbruchstücke ermöglicht einen schnelleren mikrobiellen Abbau es Zellulose-(2,5)- azetats.Under the influence of moisture, the water-soluble material is removed from the cigarette filters and the structure of the individual fibers is destroyed. The resulting large surface area of the remaining fiber fragments enables a faster microbial breakdown of cellulose (2.5) acetates.

Werden andererseits in der Spinnlösung Stärke, chemi¬ sche oder biologisch partiell abgebaute Stärke, Stärke¬ derivate, stärkehaltige Produkte wie Getreidemehl, Dextrine, suspendiert, so werden diese Zusatzstoffe durch Mikroorganismen des Bodens in Kläranlagen usw. abgebaut. Auch hier wird also die Struktur der Einzel¬ fasern der berauchten Zigarettenfilter zerstört und der weitere mikrobiologische Abbau des zurückbleibenden Zellulose-(2,5)-azetats erleichtert und beschleunigt. If, on the other hand, starch, chemical or biologically partially degraded starch, starch derivatives, starch-containing products such as cereal flour, dextrins are suspended in the spinning solution, these additives are broken down by soil microorganisms in sewage treatment plants, etc. Here too, the structure of the individual fibers of the smoked cigarette filters is destroyed and the further microbiological degradation of the remaining cellulose (2,5) acetate is facilitated and accelerated.

Claims

P a t e n t a n s p r ü c h e Patent claims 1. Verfahren zur Herstellung eines Zelluloseazetat-Kabels, wobei die das Kabel bildenden Fasern durch Auspressen einer Spinnlösung gewonnen werden, welche außer Zellulose- (2,5)-azetat und Lösungsmittel in der Spinnlösung schwer lösliche, nichttoxische Verbindungen mit einem Anteil von 0,1 - 5 Gew.%, bezogen auf das Zellulose-(2,5)-azetat, enthält, deren Durchmesser mindestens 30 % unter dem Durchmesser der Fasern liegt, dadurch gekennzeichnet, daß als Zusatzstoffe wasserlösliche Verbindungen verwendet werden.1. A process for producing a cellulose acetate cable, the fibers forming the cable being obtained by pressing out a spinning solution which, in addition to cellulose (2,5) acetate and solvent, contains sparingly soluble, non-toxic compounds in a proportion of 0, 1 - 5 wt.%, Based on the cellulose (2,5) acetate, the diameter of which is at least 30% below the diameter of the fibers, characterized in that water-soluble compounds are used as additives. 2. Verfahren zur Herstellung eines Zelluloseazetat-Kabels, wobei die das Kabel bildenden Einzelfäden durch Auspressen einer Spinnlösung gewonnen erden, welche außer Zellulose- (2,5)-azetat und Lösungsmittel in der Spinnlösung schwer lösliche, nichttoxische Verbindungen mit einem Anteil von über 0,1, bezogen auf das Zellulose-(2,5)-azetat, enthält, deren Durchmesser mindestens 30 % unter dem Durchmesser der Fasern liegt, dadurch gekennzeichnet, daß als Zusatz¬ stoffe bakteriell abbaubare organische Verbindungen, insbesondere Stärke oder Stärkederivate oder Dextrine ver¬ wendet werden.2. A process for producing a cellulose acetate cable, the individual threads forming the cable being obtained by pressing out a spinning solution which, in addition to cellulose (2,5) acetate and solvent, contains sparingly soluble, non-toxic compounds with a proportion of more than 0 , 1, based on the cellulose (2,5) acetate, the diameter of which is at least 30% below the diameter of the fibers, characterized in that bacterially degradable organic compounds, in particular starch or starch derivatives or dextrins, are added as additives ¬ be used. 3. Zigarettenfilter, dadurch gekennzeichnet, daß es unter Verwendung eines Kabels nach Anspruch .1 oder 2 hergestellt ist. 3. cigarette filter, characterized in that it is using a cable according to claim . 1 or 2 is made.
PCT/AT1992/000126 1991-10-22 1992-10-16 Cigarette filter Ceased WO1993007771A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP92921347A EP0609284B1 (en) 1991-10-22 1992-10-16 Cigarette filter
KR1019940701133A KR100264527B1 (en) 1991-10-22 1992-10-16 Manufacturing method of cellulose acetate filament genus for tobacco filter and tobacco filter
AT92921347T ATE135892T1 (en) 1991-10-22 1992-10-16 CIGARETTE FILTER
GEAP19922490A GEP19991509B (en) 1991-10-22 1992-10-16 Cigarette Filter
JP5507272A JPH07500385A (en) 1991-10-22 1992-10-16 cigarette filter
UA94005431A UA27822C2 (en) 1991-10-22 1992-10-16 Method for producing cellulose acetate bundle
CA002121136A CA2121136C (en) 1991-10-22 1992-10-16 Cigarette filter
RU9294021652A RU2083146C1 (en) 1991-10-22 1992-10-16 Method for manufacture of filament from cellulose acetate (version), cigarette filter (version)
DE59205875T DE59205875D1 (en) 1991-10-22 1992-10-16 CIGARETTE FILTER
GR960400815T GR3019451T3 (en) 1991-10-22 1996-03-28 Cigarette filter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0210191A AT396862B (en) 1991-10-22 1991-10-22 METHOD FOR PRODUCING A CELLULOSE ACETATE CABLE AND CIGARETTE FILTER THEREOF
ATA2101/91 1991-10-22

Publications (1)

Publication Number Publication Date
WO1993007771A1 true WO1993007771A1 (en) 1993-04-29

Family

ID=3527777

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1992/000126 Ceased WO1993007771A1 (en) 1991-10-22 1992-10-16 Cigarette filter

Country Status (15)

Country Link
EP (1) EP0609284B1 (en)
JP (1) JPH07500385A (en)
KR (1) KR100264527B1 (en)
CN (1) CN1053563C (en)
AT (2) AT396862B (en)
CA (1) CA2121136C (en)
DE (1) DE59205875D1 (en)
DK (1) DK0609284T3 (en)
ES (1) ES2085650T3 (en)
GE (1) GEP19991509B (en)
GR (1) GR3019451T3 (en)
RU (1) RU2083146C1 (en)
UA (1) UA27822C2 (en)
WO (1) WO1993007771A1 (en)
ZA (1) ZA928128B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0622407A1 (en) * 1993-04-28 1994-11-02 Hoechst Celanese Corporation Polymer blend composed of cellulose acetate and starch acetate used to form fibers, films and plastic materials and a process to prepare said blends
EP0632969A3 (en) * 1993-07-09 1995-03-29 Rhodia Ag Rhone Poulenc Filtertow and process for its manufacture as well as tobacco smoke filter and process for its manufacture.
EP0632968A3 (en) * 1993-07-09 1995-03-29 Rhodia Ag Rhone Poulenc Filtertow and process for its manufacture and tobacco smoke filter and process for its manufacture.
DE19536505A1 (en) * 1995-09-29 1997-04-10 Biotec Biolog Naturverpack Biodegradable filter material and process for its manufacture
US5913311A (en) * 1995-08-04 1999-06-22 Mitsubishi Rayon Co., Ltd. Cigarette filter and filter material therefor
US6739344B2 (en) 1999-03-11 2004-05-25 Japan Tobacco Inc. Biodegradable cellulose acetate structure and tobacco filter
US9010338B2 (en) 2008-10-14 2015-04-21 Solvay Acetow Gmbh Biodegradable plastic and use thereof
EP3862388B1 (en) 2019-12-09 2023-07-26 Daicel Corporation Cellulose acetate and cellulose acetate composition
US12157808B2 (en) 2020-10-21 2024-12-03 Daicel Corporation Cellulose acetate and cellulose acetate composition

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5922110A (en) * 1998-01-21 1999-07-13 Dcv, Inc. Water-soluble, biodegradable filter, and process of using same
KR101276988B1 (en) 2004-05-24 2013-06-24 브리티쉬 아메리칸 토바코 (인베스트먼츠) 리미티드 Molecularly imprinted polymers selective for nitrosamines and methods of using the same
CN1301076C (en) * 2004-05-26 2007-02-21 长沙卷烟厂 Polymer additive for cigarette filtering tips and its use
US7585441B2 (en) * 2004-06-25 2009-09-08 Celanese Acetate, Llc Process of making cellulose acetate tow
DE102004048651A1 (en) * 2004-10-06 2006-04-13 Rhodia Acetow Gmbh Tobacco smoke filters or filter elements containing additives
JP5192982B2 (en) * 2008-10-22 2013-05-08 ピジョン株式会社 Nonwovens and hygiene products
JP5192981B2 (en) * 2008-10-22 2013-05-08 ピジョン株式会社 Nonwovens and hygiene products
US8434498B2 (en) 2009-08-11 2013-05-07 R. J. Reynolds Tobacco Company Degradable filter element
EP3072405A1 (en) * 2015-03-27 2016-09-28 Cordenka GmbH & Co. KG Cigarette filter
RU2693531C1 (en) * 2019-03-06 2019-07-03 Сергей Николаевич Ким Method of producing filtering plug from acetate-cellulose fiber
WO2022109253A1 (en) * 2020-11-20 2022-05-27 Acetate International Llc Degradable cellulose acetate tow band comprising a filler

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205102A (en) * 1987-05-28 1988-11-30 British American Tobacco Co Improvements relating to the manufacture of tobacco smoke filters
EP0363288A1 (en) * 1988-09-28 1990-04-11 EASTMAN KODAK COMPANY (a New Jersey corporation) Tobacco smoke filters and process for production thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205102A (en) * 1987-05-28 1988-11-30 British American Tobacco Co Improvements relating to the manufacture of tobacco smoke filters
EP0363288A1 (en) * 1988-09-28 1990-04-11 EASTMAN KODAK COMPANY (a New Jersey corporation) Tobacco smoke filters and process for production thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, unexamined applications, C Field, Band 15, Nr. 500, 18. Dezember 1991 THE PATENT OFFICE JAPANESE GOVERNMENT, Seite 141 C 895, *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0622407A1 (en) * 1993-04-28 1994-11-02 Hoechst Celanese Corporation Polymer blend composed of cellulose acetate and starch acetate used to form fibers, films and plastic materials and a process to prepare said blends
EP0632969A3 (en) * 1993-07-09 1995-03-29 Rhodia Ag Rhone Poulenc Filtertow and process for its manufacture as well as tobacco smoke filter and process for its manufacture.
EP0632968A3 (en) * 1993-07-09 1995-03-29 Rhodia Ag Rhone Poulenc Filtertow and process for its manufacture and tobacco smoke filter and process for its manufacture.
US5913311A (en) * 1995-08-04 1999-06-22 Mitsubishi Rayon Co., Ltd. Cigarette filter and filter material therefor
DE19536505A1 (en) * 1995-09-29 1997-04-10 Biotec Biolog Naturverpack Biodegradable filter material and process for its manufacture
US6062228A (en) * 1995-09-29 2000-05-16 Biotec Biologische Natuverpackungen Gmbh & Co., Kg Biodegradable filter material and method for its manufacture
US6739344B2 (en) 1999-03-11 2004-05-25 Japan Tobacco Inc. Biodegradable cellulose acetate structure and tobacco filter
US9010338B2 (en) 2008-10-14 2015-04-21 Solvay Acetow Gmbh Biodegradable plastic and use thereof
EP3862388B1 (en) 2019-12-09 2023-07-26 Daicel Corporation Cellulose acetate and cellulose acetate composition
US12157808B2 (en) 2020-10-21 2024-12-03 Daicel Corporation Cellulose acetate and cellulose acetate composition

Also Published As

Publication number Publication date
ATA210191A (en) 1993-05-15
UA27822C2 (en) 2000-10-16
KR100264527B1 (en) 2000-09-01
GR3019451T3 (en) 1996-06-30
KR940702696A (en) 1994-09-17
ES2085650T3 (en) 1996-06-01
ATE135892T1 (en) 1996-04-15
RU2083146C1 (en) 1997-07-10
ZA928128B (en) 1993-05-04
AT396862B (en) 1993-12-27
GEP19991509B (en) 1999-03-05
DE59205875D1 (en) 1996-05-02
EP0609284B1 (en) 1996-03-27
DK0609284T3 (en) 1996-05-20
CA2121136C (en) 2001-03-06
CN1053563C (en) 2000-06-21
EP0609284A1 (en) 1994-08-10
CA2121136A1 (en) 1993-04-29
CN1072580A (en) 1993-06-02
JPH07500385A (en) 1995-01-12

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