MX169588B - Procedimiento para fabricar un articulo poroso y producto resultante - Google Patents
Procedimiento para fabricar un articulo poroso y producto resultanteInfo
- Publication number
- MX169588B MX169588B MX002601A MX260186A MX169588B MX 169588 B MX169588 B MX 169588B MX 002601 A MX002601 A MX 002601A MX 260186 A MX260186 A MX 260186A MX 169588 B MX169588 B MX 169588B
- Authority
- MX
- Mexico
- Prior art keywords
- aqueous liquid
- cellulose ester
- tube
- coagulation bath
- ester material
- Prior art date
Links
Classifications
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
-
- 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
- A24D3/06—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
-
- 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
- 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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Artificial Filaments (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Treating Waste Gases (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
La presente invención se refiere a procedimiento para fabricar un artículo poroso de un material de éster de celulosa, que se caracteriza porque consiste de las etapas de: a) proporcionar un baño de coagulación que contiene un líquido acuoso que tiene inmerso en el mismo un surtidor del tipo de tubo dentro de un anillo; b) establecer una comunicación fluida entre el líquido acuoso contenido en el baño de coagulación y el tubo del surtidor previendo una abertura en dicho tubo por debajo de la superficie del líquido acuoso; c) extruir una solución de hilatura que consiste de por lo menos un material de éster de celulosa y un solvente directamente en el líquido acuoso contenido en el baño de coagulación a través de un anillo que rodea al tubo del surtidor para formar una fibra extruída que consiste esencialmente de dicho material de éster de celulosa, permitiendo al mismo tiempo, mientras tanto, que una porción del líquido acuoso contenido en dicho baño de coagulación sea aspirada autógenamente a través de la abertura y hacia el interior del tubo para formar de esta manera un canal central en la fibra extruída; y en seguida d) secar la fibra extruída para producir una fibra hueca formada de dicho material de éster de celulosa.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/739,946 US4744932A (en) | 1985-05-31 | 1985-05-31 | Process for forming a skinless hollow fiber of a cellulose ester |
Publications (1)
Publication Number | Publication Date |
---|---|
MX169588B true MX169588B (es) | 1993-07-14 |
Family
ID=24974443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX002601A MX169588B (es) | 1985-05-31 | 1986-05-26 | Procedimiento para fabricar un articulo poroso y producto resultante |
Country Status (25)
Country | Link |
---|---|
US (1) | US4744932A (es) |
EP (1) | EP0204512A3 (es) |
JP (2) | JPS61282415A (es) |
KR (1) | KR930009830B1 (es) |
CN (1) | CN1010861B (es) |
AU (1) | AU5786686A (es) |
BR (1) | BR8602509A (es) |
CA (1) | CA1278907C (es) |
DD (1) | DD258627A5 (es) |
DK (1) | DK254586A (es) |
ES (2) | ES8706037A1 (es) |
FI (1) | FI862311A (es) |
GR (1) | GR861404B (es) |
HU (1) | HUT44294A (es) |
IL (1) | IL78911A0 (es) |
MA (1) | MA20699A1 (es) |
MT (1) | MTP986B (es) |
MW (1) | MW4286A1 (es) |
MX (1) | MX169588B (es) |
NO (1) | NO862166L (es) |
PT (1) | PT82679B (es) |
TR (1) | TR23065A (es) |
ZA (1) | ZA863755B (es) |
ZM (1) | ZM4386A1 (es) |
ZW (1) | ZW10286A1 (es) |
Families Citing this family (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0263531A (ja) * | 1988-05-30 | 1990-03-02 | Terumo Corp | 中空糸膜の製造方法 |
US4970034A (en) * | 1988-09-23 | 1990-11-13 | W. R. Grace & Co.-Conn. | Process for preparing isotropic microporous polysulfone membranes |
US4971078A (en) * | 1989-08-15 | 1990-11-20 | Hoechst Celanese Corporation | Filter for a smoking article containing a flavored hollow fiber |
US5096585A (en) * | 1991-01-28 | 1992-03-17 | W. R. Grace & Co.-Conn. | Process for preparing protein non-adsorptive microporous polysulfone membranes |
US5076916A (en) * | 1991-02-04 | 1991-12-31 | Hoechst Celanese Corp. | Device for separating fluid from a fiber following contact |
US5151227A (en) * | 1991-03-18 | 1992-09-29 | W. R. Grace & Co.-Conn. | Process for continuous spinning of hollow-fiber membranes using a solvent mixture as a precipitation medium |
KR960011587B1 (ko) * | 1991-05-21 | 1996-08-24 | 브라운 유니버시티 리서치 파운데이션 | 중공섬유 제조장치와 중공섬유 |
US5181940A (en) * | 1991-08-01 | 1993-01-26 | Union Carbide Industrial Gases Technology Corporation | Hollow fiber membranes |
FR2700772A1 (fr) * | 1993-01-27 | 1994-07-29 | Michelin Rech Tech | Composition, susceptible de donner des fibres ou des films, à base de formiate de cellulose. |
EP0636403A3 (en) * | 1993-07-28 | 1996-03-27 | Toyo Boseki | Cellulose acetate hemodialysis membrane. |
JP3420359B2 (ja) * | 1994-10-21 | 2003-06-23 | ダイセル化学工業株式会社 | たばこ煙用フィルター素材、繊維状セルロースエステル及びその製造方法 |
US5743251A (en) * | 1996-05-15 | 1998-04-28 | Philip Morris Incorporated | Aerosol and a method and apparatus for generating an aerosol |
US6234167B1 (en) | 1998-10-14 | 2001-05-22 | Chrysalis Technologies, Incorporated | Aerosol generator and methods of making and using an aerosol generator |
JP4185250B2 (ja) * | 1998-11-12 | 2008-11-26 | サンスター技研株式会社 | ビード成形方法及び装置 |
EP1127608A4 (en) * | 1999-05-31 | 2005-11-16 | Daicel Chem | HOLLOW FIBER MEMBRANE FROM CELLULOSE DERIVATIVES |
MY136453A (en) * | 2000-04-27 | 2008-10-31 | Philip Morris Usa Inc | "improved method and apparatus for generating an aerosol" |
US6883516B2 (en) | 2000-04-27 | 2005-04-26 | Chrysalis Technologies Incorporated | Method for generating an aerosol with a predetermined and/or substantially monodispersed particle size distribution |
US6501052B2 (en) | 2000-12-22 | 2002-12-31 | Chrysalis Technologies Incorporated | Aerosol generator having multiple heating zones and methods of use thereof |
US7077130B2 (en) * | 2000-12-22 | 2006-07-18 | Chrysalis Technologies Incorporated | Disposable inhaler system |
US6491233B2 (en) | 2000-12-22 | 2002-12-10 | Chrysalis Technologies Incorporated | Vapor driven aerosol generator and method of use thereof |
US6681998B2 (en) | 2000-12-22 | 2004-01-27 | Chrysalis Technologies Incorporated | Aerosol generator having inductive heater and method of use thereof |
US6701921B2 (en) | 2000-12-22 | 2004-03-09 | Chrysalis Technologies Incorporated | Aerosol generator having heater in multilayered composite and method of use thereof |
US6799572B2 (en) * | 2000-12-22 | 2004-10-05 | Chrysalis Technologies Incorporated | Disposable aerosol generator system and methods for administering the aerosol |
US6616912B2 (en) | 2001-01-05 | 2003-09-09 | Spectrum Laboratories, Inc. | Bi-component microporous hollow fiber membrane structure for in vivo propagation of cells |
SG99371A1 (en) * | 2001-08-17 | 2003-10-27 | Environmental Technology Inst | Hollow fiber membrane for the treatment of waste lubricants and method for its production |
US6640050B2 (en) | 2001-09-21 | 2003-10-28 | Chrysalis Technologies Incorporated | Fluid vaporizing device having controlled temperature profile heater/capillary tube |
US6568390B2 (en) | 2001-09-21 | 2003-05-27 | Chrysalis Technologies Incorporated | Dual capillary fluid vaporizing device |
US6681769B2 (en) | 2001-12-06 | 2004-01-27 | Crysalis Technologies Incorporated | Aerosol generator having a multiple path heater arrangement and method of use thereof |
US6804458B2 (en) | 2001-12-06 | 2004-10-12 | Chrysalis Technologies Incorporated | Aerosol generator having heater arranged to vaporize fluid in fluid passage between bonded layers of laminate |
US6701922B2 (en) | 2001-12-20 | 2004-03-09 | Chrysalis Technologies Incorporated | Mouthpiece entrainment airflow control for aerosol generators |
WO2003064003A1 (en) * | 2002-01-29 | 2003-08-07 | Amersham Biosciences Membrane Separations Corp. | Convoluted surface hollow fiber membranes |
AU2003209418A1 (en) * | 2002-01-29 | 2003-09-02 | Amersham Biosciences Membrane Separations Corp. | Spiraled surface hollow fiber membranes |
US7074170B2 (en) | 2002-03-29 | 2006-07-11 | Philip Morris Usa Inc. | Method and apparatus for making cigarette filters with a centrally located flavored element |
US7759540B2 (en) * | 2002-07-23 | 2010-07-20 | Paragon Trade Brands, Llc | Absorbent articles containing absorbent cores having zoned absorbency and methods of making same |
US7367334B2 (en) | 2003-08-27 | 2008-05-06 | Philip Morris Usa Inc. | Fluid vaporizing device having controlled temperature profile heater/capillary tube |
US20080296808A1 (en) * | 2004-06-29 | 2008-12-04 | Yong Lak Joo | Apparatus and Method for Producing Electrospun Fibers |
US7553440B2 (en) * | 2005-05-12 | 2009-06-30 | Leonard William K | Method and apparatus for electric treatment of substrates |
GB0517551D0 (en) * | 2005-08-27 | 2005-10-05 | Acetate Products Ltd | Process for making filter tow |
US20070074733A1 (en) * | 2005-10-04 | 2007-04-05 | Philip Morris Usa Inc. | Cigarettes having hollow fibers |
US7878210B2 (en) * | 2007-06-04 | 2011-02-01 | Philip Morris Usa Inc. | Cellulose acetate fiber modification |
US8113215B2 (en) * | 2007-06-21 | 2012-02-14 | Philip Morris Usa Inc. | Smoking article filter having liquid additive containing tubes therein |
US20090136553A1 (en) * | 2007-09-25 | 2009-05-28 | Gerlach Jorg C | Triggerably dissolvable hollow fibers for controlled delivery |
EP2110031A1 (en) | 2008-04-18 | 2009-10-21 | Philip Morris Products S.A. | Filter making apparatus |
JP2011521656A (ja) * | 2008-06-02 | 2011-07-28 | フィリップ・モーリス・プロダクツ・ソシエテ・アノニム | 透明区画を有する喫煙物品 |
US8308623B2 (en) * | 2008-10-28 | 2012-11-13 | R.J. Reynolds Tobacco Company | Apparatus for enhancing a filter component of a smoking article, and associated method |
CN102423129A (zh) * | 2011-08-26 | 2012-04-25 | 湖北中烟工业有限责任公司 | 一种中空纤维香烟滤嘴的制备方法 |
CN103720042B (zh) * | 2013-12-20 | 2015-10-21 | 苏州鑫帛泰纺织科研有限公司 | 多孔中空纤维香烟滤嘴 |
JP5982412B2 (ja) * | 2014-02-12 | 2016-08-31 | 富士フイルム株式会社 | 繊維製造方法及び不織布製造方法並びに繊維製造設備及び不織布製造設備 |
DE102019135114A1 (de) * | 2019-12-19 | 2021-06-24 | Cerdia International GmbH | 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 |
US20230008772A1 (en) * | 2021-07-08 | 2023-01-12 | University Of Kentucky Research Foundation | Spinneret, blowing system and method for producing hollow fibers |
Family Cites Families (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2416291A (en) * | 1942-11-14 | 1947-02-25 | American Viscose Corp | Method and apparatus for spinning synthetic shapes |
US2536092A (en) * | 1946-09-21 | 1951-01-02 | American Viscose Corp | Method and apparatus for wet spinning of artificial filaments |
US2825120A (en) * | 1954-05-11 | 1958-03-04 | Eastman Kodak Co | Synthetic filament |
BE538171A (es) * | 1954-06-17 | |||
US2828752A (en) * | 1954-08-16 | 1958-04-01 | Eastman Kodak Co | Fibrous tobacco smoke filters |
US2916777A (en) * | 1954-09-16 | 1959-12-15 | Eastman Kodak Co | Improved method of extruding a tobacco smoke filter |
FR1165860A (fr) * | 1955-01-07 | 1958-10-30 | Eastman Kodak Co | Procédé et filière pour la fabrication de filaments et fibres synthétiques, nouveaux produits textiles obtenus et leurs applications |
NL96619C (es) * | 1956-04-11 | |||
US3311115A (en) * | 1963-10-29 | 1967-03-28 | Buckeye Cellulose Corp | Low density aerosol filter |
US3724672A (en) * | 1970-07-27 | 1973-04-03 | R Leonard | Asymmetric hollow fiber membranes and method of fabrication |
US3939849A (en) * | 1970-11-18 | 1976-02-24 | Monsanto Chemicals Limited | Filter elements |
DE2164422A1 (de) * | 1970-12-24 | 1972-07-13 | Asahi Kasei Kogaku Kogyo K.K., Osaka (Japan) | Synthese-Faser und Verfahren zu ihrer Herstellung |
US4007745A (en) * | 1971-03-23 | 1977-02-15 | Celanese Corporation | Filter |
JPS5193786A (en) * | 1975-02-15 | 1976-08-17 | Makurokagatano chukuseni | |
US4127625A (en) * | 1975-03-27 | 1978-11-28 | Daicel Ltd. | Process for preparing hollow fiber having selective gas permeability |
US4035459A (en) * | 1975-05-01 | 1977-07-12 | Chemical Systems, Inc. | Process for spinning dry-fiber cellulose acetate hollow fiber membranes |
JPS5215627A (en) * | 1975-07-09 | 1977-02-05 | Mitsubishi Rayon Co Ltd | Porous polypropylene hollow fibers and a process for manufacturing the m |
JPS6033844B2 (ja) * | 1975-07-24 | 1985-08-05 | 大日本インキ化学工業株式会社 | 分散樹脂組成物の製法 |
GB1566581A (en) * | 1975-12-29 | 1980-05-08 | Nippon Zeon Co | Hollow fibres and methods of manufacturing such fibres |
US4076933A (en) * | 1976-02-27 | 1978-02-28 | International Telephone And Telegraph Corporation | Process for producing a regenerated shaped cellulosic fiber |
JPS5318920A (en) * | 1976-08-06 | 1978-02-21 | Hitachi Ltd | Pattern compression system |
US4283186A (en) * | 1976-10-06 | 1981-08-11 | Celanese Corporation | Method of forming cigarette filter material |
JPS5399400A (en) * | 1977-02-10 | 1978-08-30 | Mitsubishi Acetate Co Ltd | Fibrous cigarette filter |
JPS5812932B2 (ja) * | 1977-06-30 | 1983-03-10 | 日本ゼオン株式会社 | 中空繊維の製造方法 |
GB2009667B (en) * | 1977-12-09 | 1982-05-12 | Mitsubishi Acetate Co Ltd | Surface-modified cellulose acetate filaments and a process for producing the same |
US4282890A (en) * | 1978-03-13 | 1981-08-11 | Celanese Corporation | Open cell structure foamed cellulose acetate filters |
FR2437241A1 (fr) * | 1978-09-29 | 1980-04-25 | Ugine Kuhlmann | Agent de nettoyage dispersant des hydrocarbures en milieu marin |
JPS5584412A (en) * | 1978-12-20 | 1980-06-25 | Nippon Zeon Co Ltd | Production of hollow fiber |
US4361617A (en) * | 1979-07-26 | 1982-11-30 | Teijin Limited | Hollow water-absorbing polyester filaments and a process for producing the same |
JPS5782514A (en) * | 1980-11-04 | 1982-05-24 | Mitsubishi Rayon Co Ltd | Porous cellulose acetate fiber and its preparation |
JPS5955308A (ja) * | 1982-09-21 | 1984-03-30 | Toyobo Co Ltd | ガス分離膜 |
JPS60806A (ja) * | 1983-06-17 | 1985-01-05 | Teijin Ltd | 血漿アルブミン選択透過性中空糸膜の製造法 |
-
1985
- 1985-05-31 US US06/739,946 patent/US4744932A/en not_active Expired - Lifetime
-
1986
- 1986-05-15 CA CA000509211A patent/CA1278907C/en not_active Expired - Fee Related
- 1986-05-19 ZW ZW102/86A patent/ZW10286A1/xx unknown
- 1986-05-20 ZA ZA863755A patent/ZA863755B/xx unknown
- 1986-05-21 HU HU862158A patent/HUT44294A/hu unknown
- 1986-05-23 AU AU57866/86A patent/AU5786686A/en not_active Abandoned
- 1986-05-26 IL IL78911A patent/IL78911A0/xx unknown
- 1986-05-26 MX MX002601A patent/MX169588B/es unknown
- 1986-05-26 MW MW42/86A patent/MW4286A1/xx unknown
- 1986-05-28 ZM ZM43/86A patent/ZM4386A1/xx unknown
- 1986-05-29 DD DD86290728A patent/DD258627A5/de unknown
- 1986-05-29 MT MT986A patent/MTP986B/xx unknown
- 1986-05-29 GR GR861404A patent/GR861404B/el unknown
- 1986-05-29 EP EP86304073A patent/EP0204512A3/en not_active Ceased
- 1986-05-30 FI FI862311A patent/FI862311A/fi not_active Application Discontinuation
- 1986-05-30 DK DK254586A patent/DK254586A/da not_active Application Discontinuation
- 1986-05-30 KR KR1019860004267A patent/KR930009830B1/ko not_active IP Right Cessation
- 1986-05-30 PT PT82679A patent/PT82679B/pt unknown
- 1986-05-30 MA MA20925A patent/MA20699A1/fr unknown
- 1986-05-30 ES ES555519A patent/ES8706037A1/es not_active Expired
- 1986-05-30 BR BR8602509A patent/BR8602509A/pt unknown
- 1986-05-30 JP JP61123851A patent/JPS61282415A/ja active Pending
- 1986-05-30 TR TR288/86A patent/TR23065A/xx unknown
- 1986-05-30 NO NO862166A patent/NO862166L/no unknown
- 1986-05-31 CN CN86103913A patent/CN1010861B/zh not_active Expired
-
1987
- 1987-02-04 ES ES557367A patent/ES8707872A1/es not_active Expired
-
1994
- 1994-09-05 JP JP6245752A patent/JPH07170962A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
GR861404B (en) | 1986-09-26 |
EP0204512A3 (en) | 1989-01-25 |
MA20699A1 (fr) | 1986-12-31 |
PT82679A (en) | 1986-06-01 |
CN1010861B (zh) | 1990-12-19 |
JPS61282415A (ja) | 1986-12-12 |
DD258627A5 (de) | 1988-07-27 |
ES557367A0 (es) | 1987-09-01 |
CA1278907C (en) | 1991-01-15 |
MW4286A1 (en) | 1988-08-10 |
DK254586D0 (da) | 1986-05-30 |
CN86103913A (zh) | 1987-02-04 |
BR8602509A (pt) | 1987-01-27 |
JPH07170962A (ja) | 1995-07-11 |
KR860009162A (ko) | 1986-12-20 |
TR23065A (tr) | 1989-02-03 |
ES8707872A1 (es) | 1987-09-01 |
KR930009830B1 (ko) | 1993-10-11 |
ZA863755B (en) | 1987-01-28 |
HUT44294A (en) | 1988-02-29 |
ZW10286A1 (en) | 1986-11-12 |
MTP986B (en) | 1988-10-18 |
FI862311A (fi) | 1986-12-01 |
US4744932A (en) | 1988-05-17 |
PT82679B (en) | 1987-12-14 |
IL78911A0 (en) | 1986-09-30 |
ES555519A0 (es) | 1987-06-01 |
EP0204512A2 (en) | 1986-12-10 |
NO862166L (no) | 1986-12-01 |
FI862311A0 (fi) | 1986-05-30 |
AU5786686A (en) | 1986-12-04 |
ZM4386A1 (en) | 1986-12-29 |
ES8706037A1 (es) | 1987-06-01 |
DK254586A (da) | 1986-12-01 |
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