KR900002936A - 피브릴화 테이프 및 그 제조방법 - Google Patents
피브릴화 테이프 및 그 제조방법 Download PDFInfo
- Publication number
- KR900002936A KR900002936A KR1019890011094A KR890011094A KR900002936A KR 900002936 A KR900002936 A KR 900002936A KR 1019890011094 A KR1019890011094 A KR 1019890011094A KR 890011094 A KR890011094 A KR 890011094A KR 900002936 A KR900002936 A KR 900002936A
- Authority
- KR
- South Korea
- Prior art keywords
- pressure sensitive
- sensitive adhesive
- polymer film
- fibrillated
- backing
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/205—Adhesives in the form of films or foils characterised by their carriers characterised by the backing impregnating composition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
- C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2421/00—Presence of unspecified rubber
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/006—Presence of polyolefin in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2453/00—Presence of block copolymer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/91—Product with molecular orientation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2848—Three or more layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/2878—Adhesive compositions including addition polymer from unsaturated monomer
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 의한 압력감응성 접착테이프의 단면도,
제2도는 본 발명의 테이프 제조방법에 이용되는 장치의 개략설명도,
제3도는 본 발명의 방법에 이용되는 배향기의 일부에 대한 개략설명도.
Claims (16)
- 적어도 하나의 표면상에 피브릴화 폴리머 필름층을 가지는 백킹을 포함하고, 상기 필름층은 상기 백킹을 향하고 있지 않은 그것의 주요 표면상에 압력감응성 접착제층을 가지는 압력감응성 접착테이프.
- 제 1항에 있어서, 상기 피브릴화 폴리머 필름이 기계방향으로 배향된 압력감응성 접착테이프.
- 제 1 항에 있어서, 상기 피브릴화 폴리머 필름이 피브릴화 되기 전에 필름형태로 미리 압출되어서 기계 방향으로 배향된 압력감응성 접착테이프.
- 제 3 항에 있어서, 상기 필름이 약 3 : 1 내지 약 12 : 1의 배율로 배향된 압력감응성 접착테이프.
- 제 1 항에 있어서, 상기 백킹이 폴리머 재료를 포함하는 압력감응성 접착테이프.
- 제 1 항에 있어서, 상기 피브릴화 필름층이 단위 인치(in) 당 약 50 내지 약 200개의 피브릴을 포함하는 압력감응성 접착테이프.
- 제 1 항에 있어서, 상기 폴리머 필름이 폴리올레핀으로 제조된 압력감응성 접착테이프.
- 제 7 항에 있어서, 상기 폴리머 필름이 폴리프로필렌으로 제조된 압력감응성 접착테이프.
- 제 7 항에 있어서, 상기 폴리머 필름이 폴리에스테르로 제조된 압력감응성 접착테이프.
- 제 9항에 있어서, 상기 폴리에스테르가 폴리에틸렌 테레프탈레이트를 포함하는 압력감응성 접착테이프.
- 제 1항에 있어서, 상기 압력감응성 접착제가 천연고무, 열가소성 수지 및 블록 공중합체로 이루어진 군에서 선택된 압력감응성 접착테이프.
- (a) 적어도 하나의 주요 표면상에 제 1의 접착제층을 가지는 백킹을 제공하는 단계와, (b) 피브릴화 폴리머 필름층을 제공하는 단계와, (c) 상기 피브릴화 폴리머 필름층을 상기 제 1의 접착제층에 의해서 상기 백킹에 접착시키는 단계와, (d) 상기 백킹을 향하고 있지 않은 상기 피브릴화 폴리머 필름층의 주요 표면상에 압력감응성 접착제층을 도포하는 단계를 포함하는 제 1항의 테이프의 제조방법.
- (a) 적어도 하나의 주요 표면상에 제 1의 접착제층을 가지는 백킹을 제공하는 단계와, (b) 피브릴화 배향 폴리머 필름층을 제공하는 단계와, (c) 상기 피르릴화 배향 폴리머 필름층을 상기 제 1의 접착제층에 의해서 상기 백킹에 접착시키는 단계와, (d) 상기 백킹을 향하고 있지 않은 상기 피브릴화 배향폴리머 필름층의 주요 표면상에 압력감응성 접착제층을 도포하는 단계를 포함하는 제 2항의 테이프의 제조방법.
- 제 13항에 있어서, 상기 피브릴화 폴리머 필름을 피브릴화 전에 배향시키는 테이프의 제조방법.
- 제 14항에 있어서, 상기 피브릴화 폴리머 필름을 배향 및 피브릴화 전에 압출하는 테이프의 제조방법.
- 제 12항에 있어서, 상기 압력감응성 접착제층을 압출피복 방법에 의해 도포하는 테이프의 제조방법.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US228,391 | 1981-01-26 | ||
US228.391 | 1988-08-04 | ||
US07/228,391 US4973517A (en) | 1988-08-04 | 1988-08-04 | Fibrillated tape |
Publications (2)
Publication Number | Publication Date |
---|---|
KR900002936A true KR900002936A (ko) | 1990-03-23 |
KR0125281B1 KR0125281B1 (ko) | 1997-11-27 |
Family
ID=22856989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019890011094A KR0125281B1 (ko) | 1988-08-04 | 1989-08-03 | 피브릴화 테이프 및 그 제조방법 |
Country Status (8)
Country | Link |
---|---|
US (1) | US4973517A (ko) |
EP (1) | EP0353907B1 (ko) |
JP (1) | JP2958025B2 (ko) |
KR (1) | KR0125281B1 (ko) |
AU (1) | AU621129B2 (ko) |
BR (1) | BR8903910A (ko) |
CA (1) | CA1339245C (ko) |
DE (1) | DE68922538T2 (ko) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5518811A (en) * | 1991-03-26 | 1996-05-21 | Minnesota Mining And Manufacturing Company | Pressure-sensitive adhesive tape and a process for producing same |
IT1255632B (it) * | 1992-05-22 | 1995-11-09 | Snam Spa | Nastro per rinforzare corpi cavi adatti a sopportare pressioni e procedimento per la riparazione di tubazioni deteriorate |
JP3516035B2 (ja) | 1997-05-13 | 2004-04-05 | 綜研化学株式会社 | 粘着剤組成物 |
US6110588A (en) | 1999-02-05 | 2000-08-29 | 3M Innovative Properties Company | Microfibers and method of making |
US6630231B2 (en) * | 1999-02-05 | 2003-10-07 | 3M Innovative Properties Company | Composite articles reinforced with highly oriented microfibers |
US6287658B1 (en) | 1999-09-10 | 2001-09-11 | E. I. Du Pont De Nemours And Company | Flexible composite suitable as packaging material |
US6680114B2 (en) | 2001-05-15 | 2004-01-20 | 3M Innovative Properties Company | Fibrous films and articles from microlayer substrates |
US6977113B2 (en) * | 2001-10-09 | 2005-12-20 | 3M Innovative Properties Company | Microfiber articles from multi-layer substrates |
US6998068B2 (en) * | 2003-08-15 | 2006-02-14 | 3M Innovative Properties Company | Acene-thiophene semiconductors |
US6692823B2 (en) | 2001-12-19 | 2004-02-17 | 3M Innovative Properties Company | Microfibrillated articles comprising hydrophillic component |
US6753080B1 (en) | 2002-01-29 | 2004-06-22 | 3M Innovative Properties Company | Receptor medium having a microfibrillated surface |
US7294397B2 (en) | 2002-05-29 | 2007-11-13 | E.I. Du Pont De Nemors And Company | Fibrillar microstructure for conformal contact and adhesion |
AU2004220101B2 (en) * | 2003-03-12 | 2010-03-25 | Avery Dennison Corporation | Reusable closures for packages and methods of making and using the same |
DE102006034252A1 (de) * | 2006-07-21 | 2008-01-24 | Tesa Ag | Monoaxial verstreckte Polypropylenfolie mit hohem Weiterreißwiderstand in Querrichtung |
DE102008005564A1 (de) | 2008-01-22 | 2009-07-23 | Tesa Ag | Trägerfolie insbesondere für ein Klebeband und Verwendung derselben |
EP3556821A1 (de) * | 2018-04-20 | 2019-10-23 | Uzin Utz Schweiz AG | Selbstklebefolie mit klebefreundlicher oberfläche und abdeckschicht |
GB2596515A (en) * | 2020-06-15 | 2022-01-05 | Stephen Boyce Gerard | Thermoplastic composite tape |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2750315A (en) * | 1949-04-29 | 1956-06-12 | Permacel Tape Corp | Pressure-sensitive adhesive strapping tape |
US2720477A (en) * | 1953-04-30 | 1955-10-11 | Plastic Film Corp | Plastic bandage or adhesive tape and process of manufacture |
US3482683A (en) * | 1965-10-22 | 1969-12-09 | Johnson & Johnson | Pressure sensitive tape |
US3851034A (en) * | 1966-11-17 | 1974-11-26 | Johnson & Johnson | Methods of making sheet material |
US3384580A (en) * | 1967-05-09 | 1968-05-21 | Acheson Ind Inc | Graphite dispersions |
US3739058A (en) * | 1970-08-27 | 1973-06-12 | Dow Chemical Co | Production of a paper pigment grade magnesium hydroxide product |
US3783098A (en) * | 1971-08-10 | 1974-01-01 | Cornell Res Foundation Inc | Highly potent,viable and stable cellfree virus preparations from cells infected with cell-associated viruses and method for obtaining the same |
NL160303C (nl) * | 1974-03-25 | 1979-10-15 | Verto Nv | Werkwijze voor het vervaardigen van een vezelfilter. |
US3991754A (en) * | 1975-09-15 | 1976-11-16 | Ethicon, Inc. | Surgical adhesive tape |
IT1160180B (it) * | 1983-01-18 | 1987-03-04 | Moplefan Spa | Procedimento per la produzione di lastre di cemento rinforzate con film polimerici fibrillati |
US4654254A (en) * | 1984-10-11 | 1987-03-31 | The Kendall Company | Adhesive tape |
JPS61118483A (ja) * | 1984-11-13 | 1986-06-05 | Toyama Kogyo Kk | 粘着テ−プとその製造方法 |
US4818610A (en) * | 1986-08-29 | 1989-04-04 | Minnesota Mining And Manufacturing Company | Unified pressure-sensitive adhesive tape |
-
1988
- 1988-08-04 US US07/228,391 patent/US4973517A/en not_active Expired - Lifetime
-
1989
- 1989-07-05 AU AU37896/89A patent/AU621129B2/en not_active Ceased
- 1989-07-10 CA CA000605247A patent/CA1339245C/en not_active Expired - Fee Related
- 1989-07-19 EP EP89307323A patent/EP0353907B1/en not_active Expired - Lifetime
- 1989-07-19 DE DE68922538T patent/DE68922538T2/de not_active Expired - Fee Related
- 1989-08-03 KR KR1019890011094A patent/KR0125281B1/ko not_active IP Right Cessation
- 1989-08-03 BR BR898903910A patent/BR8903910A/pt not_active Application Discontinuation
- 1989-08-03 JP JP1202249A patent/JP2958025B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
BR8903910A (pt) | 1990-03-27 |
EP0353907B1 (en) | 1995-05-10 |
EP0353907A2 (en) | 1990-02-07 |
JP2958025B2 (ja) | 1999-10-06 |
CA1339245C (en) | 1997-08-12 |
DE68922538D1 (de) | 1995-06-14 |
KR0125281B1 (ko) | 1997-11-27 |
JPH0275678A (ja) | 1990-03-15 |
AU3789689A (en) | 1990-02-08 |
DE68922538T2 (de) | 1996-01-18 |
AU621129B2 (en) | 1992-03-05 |
US4973517A (en) | 1990-11-27 |
EP0353907A3 (en) | 1991-12-27 |
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