MX2013006672A - Metodo para producir cuerpos de guia de luz y uso de los mismos en una unidad de iluminacion. - Google Patents

Metodo para producir cuerpos de guia de luz y uso de los mismos en una unidad de iluminacion.

Info

Publication number
MX2013006672A
MX2013006672A MX2013006672A MX2013006672A MX2013006672A MX 2013006672 A MX2013006672 A MX 2013006672A MX 2013006672 A MX2013006672 A MX 2013006672A MX 2013006672 A MX2013006672 A MX 2013006672A MX 2013006672 A MX2013006672 A MX 2013006672A
Authority
MX
Mexico
Prior art keywords
light guide
guide bodies
producing light
lighting unit
present
Prior art date
Application number
MX2013006672A
Other languages
English (en)
Other versions
MX336822B (es
Inventor
Michael Enders
Markus Parusel
Guenther Dickhaut
Thomas Pfaff
Helmut Haering
Original Assignee
Evonik Roehm Gmbh
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
Application filed by Evonik Roehm Gmbh filed Critical Evonik Roehm Gmbh
Publication of MX2013006672A publication Critical patent/MX2013006672A/es
Publication of MX336822B publication Critical patent/MX336822B/es

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/31—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections
    • B29C48/313—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections by positioning the die lips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00663—Production of light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/002—Combinations of extrusion moulding with other shaping operations combined with surface shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • B29K2033/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0072—Roughness, e.g. anti-slip
    • B29K2995/0073—Roughness, e.g. anti-slip smooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3475—Displays, monitors, TV-sets, computer screens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

La presente invención se refiere a un método para producir cuerpos de guía de luz y a su uso en unidades de iluminación, por ejemplo, para pantallas de cristal líquido o para monitores. En particular, la presente invención se refiere a un método para producir cuerpos de guía de luz que tienen un espesor de a lo más 1 mm y contienen al menos 80% en peso de metacrilato de polimetilo y no tienen constituyentes de dispersión de luz. En el método el material polimérico como una placa o película delgada por un aparato mezclador (1), una matriz de película plana (2) y un reborde de matriz (3) que está adaptado a la circunferencia externa de los rodillos de alisadura. La distancia de los rodillos de alisadura y el reborde de matriz puede ser ópticamente controlada.
MX2013006672A 2010-12-13 2011-11-11 Metodo para producir cuerpos de guia de luz y uso de los mismos en una unidad de iluminacion. MX336822B (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010062900A DE102010062900A1 (de) 2010-12-13 2010-12-13 Verfahren zur Herstellung von Lichtleitkörpern und deren Verwendung in Beleuchtungseinheit
PCT/EP2011/069893 WO2012079865A2 (de) 2010-12-13 2011-11-11 Verfahren zur herstellung von lichtleitkörpern und deren verwendung in beleuchtungseinheit

Publications (2)

Publication Number Publication Date
MX2013006672A true MX2013006672A (es) 2013-07-30
MX336822B MX336822B (es) 2016-02-03

Family

ID=45093700

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2013006672A MX336822B (es) 2010-12-13 2011-11-11 Metodo para producir cuerpos de guia de luz y uso de los mismos en una unidad de iluminacion.

Country Status (12)

Country Link
US (1) US9442237B2 (es)
EP (1) EP2651618A2 (es)
JP (1) JP5930326B2 (es)
KR (2) KR101714115B1 (es)
CN (1) CN103328182B (es)
BR (1) BR112013014768A2 (es)
DE (1) DE102010062900A1 (es)
HK (1) HK1187306A1 (es)
IL (1) IL226887A (es)
MX (1) MX336822B (es)
TW (1) TWI623409B (es)
WO (1) WO2012079865A2 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027288A1 (de) 2009-06-29 2010-12-30 Evonik Röhm Gmbh Lichtleitplatte mit eingebetteten lichtstreuenden Störstellen und Verfahren zu dessen Herstellung
US20120051696A2 (en) 2010-04-08 2012-03-01 Evonik Roehm Gmbh Light guide body having high luminous intensity and high transparency
DE102011088835A1 (de) 2011-12-16 2013-06-20 Evonik Industries Ag Verfahren zur Herstellung von Lichtleitkörpern und deren Verwendung in Beleuchtungseinheit
US9902644B2 (en) 2014-06-19 2018-02-27 Corning Incorporated Aluminosilicate glasses
EP3075803A1 (de) * 2015-03-31 2016-10-05 Evonik Röhm GmbH Abzugssichere sicherheitsfolie mit hoher transparenz und ohne sollbruchstellen
JP6571412B2 (ja) 2015-06-29 2019-09-04 東芝機械株式会社 光学シート成形装置、光学シート成形方法
JP6917680B2 (ja) 2016-04-27 2021-08-11 芝浦機械株式会社 光学シート成形装置、光学シート成形方法

Family Cites Families (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US486361A (en) * 1892-11-15 Joseph t
US2938231A (en) 1958-10-02 1960-05-31 Blaw Knox Co Plastic extrusion die
DE1504266A1 (de) 1965-04-02 1969-06-04 Hoechst Ag Verfahren und Vorrichtung zur Herstellung von Kunststoff-Folien nach dem Extrudierverfahren und mit anschliessender Walzbehandlung
US3408694A (en) 1966-08-25 1968-11-05 Stewart Bolling & Co Inc Extruder
DE2450225C3 (de) 1974-10-23 1986-07-10 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover Extruder-Kalander zum Verarbeiten von plastischen Massen
US4226904A (en) * 1978-11-27 1980-10-07 Produits Chimiques Ugine Kuhlmann Polymethyl methacrylate-polyvinylidene fluoride laminates and method
DE2937204C2 (de) 1979-09-14 1982-09-02 Werner & Pfleiderer, 7000 Stuttgart Extrudermaschine mit Breitspritzkopf und zugeordnetem Kalander
DE2947250C2 (de) 1979-11-23 1983-12-01 Werner & Pfleiderer, 7000 Stuttgart Unmittelbar einem Extruder nachgeordnetes Walzwerk
NL8501127A (nl) 1985-04-18 1986-11-17 Kunststofverwerkende Ind Katan Vliegtuigruit.
DE3805774A1 (de) * 1988-02-24 1989-09-07 Sigmund Boos Schlitzduese, insbesondere breitschlitzduese, fuer extrudieranlagen in der kunststoffindustrie
DE8813801U1 (es) 1988-11-04 1988-12-22 Roehm Gmbh, 6100 Darmstadt, De
DE4009917C1 (es) 1990-03-28 1991-11-21 Paul Troester Maschinenfabrik, 3000 Hannover, De
DE4110060A1 (de) 1991-03-27 1992-10-01 Hoechst Ag Verfahren und vorrichtung zum vergleichmaessigen der dicke einer folie
JPH07130208A (ja) 1993-10-29 1995-05-19 Hayashi Telempu Co Ltd 自動車用光源装置
DE9318362U1 (de) 1993-12-01 1994-02-03 Roehm Gmbh Gleichmäßig ausgeleuchtete Lichtleiterplatten
US5424018A (en) * 1994-01-13 1995-06-13 General Electric Company Variable width die and method for extruding sheet products
JP2996882B2 (ja) * 1994-10-20 2000-01-11 東芝機械株式会社 熱変位式ｔダイ
JPH091631A (ja) * 1995-06-16 1997-01-07 Kobe Steel Ltd ローラヘッド押出機のシート幅調整装置
US5779962A (en) 1996-04-01 1998-07-14 Minnesota Mining And Manufacturing Company Extruding thin multiphase polymer films
JPH09325221A (ja) 1996-04-04 1997-12-16 Hitachi Cable Ltd 照明装置
DE19836800A1 (de) 1998-08-14 2000-02-17 Roehm Gmbh Optisch isotrope Polycarbonat-Folien sowie Verfahren zu deren Herstellung
IT1307920B1 (it) 1999-01-22 2001-11-29 Atochem Elf Sa Compositi diffondenti la luce.
US6406285B1 (en) 1999-10-21 2002-06-18 Welex Incorporated Apparatus for measuring and of controlling the gap between polymer sheet cooling rolls
WO2002085980A1 (en) * 2001-04-20 2002-10-31 Plaskolite, Inc. High heat distortion temperature methacrylate polymer blends
DE10156068A1 (de) 2001-11-16 2003-05-28 Roehm Gmbh Lichtleitkörper sowie Verfahren zu dessen Herstellung
DE10222250A1 (de) 2002-05-16 2003-11-27 Roehm Gmbh Verbesserte Lichtleitkörper sowie Verfahren zu dessen Herstellung
JP4088135B2 (ja) * 2002-10-29 2008-05-21 積水化学工業株式会社 光学フィルムの製造方法
CN2642494Y (zh) * 2003-08-25 2004-09-22 平湖伟峰科技有限责任公司 挤出机动态调幅装置
DE10340040A1 (de) 2003-08-28 2005-03-31 Schefenacker Vision Systems Germany Gmbh & Co. Kg Beleuchtungseinheit mit Lichtleitkörper und integrierter optischer Linse
JP2005144771A (ja) * 2003-11-13 2005-06-09 Jsr Corp 表面意匠性フィルムまたはシートの製造方法、および表面意匠性フィルムまたはシート
WO2005107363A2 (en) * 2004-04-30 2005-11-17 Oy Modilis Ltd. Ultrathin lighting element
US20060121154A1 (en) * 2004-09-30 2006-06-08 Duane Manning Laser device for alignment of a nozzle tip within injection molding and extrusion equipment
WO2006046638A1 (ja) 2004-10-28 2006-05-04 Asahi Kasei Chemicals Corporation 導光板及びその製造方法
DE102005020424A1 (de) 2005-04-29 2006-11-02 Röhm Gmbh Verfahren zur Herstellung einer Folie aus thermoplastischem Kunststoff, Folie und Verwendung der Folie
JP5092265B2 (ja) 2006-04-12 2012-12-05 住友化学株式会社 導光板の製造方法
US20090240047A1 (en) * 2006-04-19 2009-09-24 Fujifilm Corporatio Cellulosic resin film and process for producing the same
DE102006025481A1 (de) 2006-05-30 2007-12-06 Röhm Gmbh Verfahren zur Herstellung einer eingefärbten Folie aus thermoplastischem Kunststoffen, Folie und Verwendung der Folie
KR100730415B1 (ko) 2006-12-20 2007-06-19 제일모직주식회사 광학필름 제조장치 및 이를 이용한 광학필름 제조방법
TW200827852A (en) * 2006-12-28 2008-07-01 Ind Tech Res Inst Coupling device
JP4843592B2 (ja) 2007-10-22 2011-12-21 出光興産株式会社 ポリカーボネート樹脂組成物及び導光板
JP2009107180A (ja) * 2007-10-29 2009-05-21 Kaneka Corp 光学フィルムの製造方法および光学フィルム
US20090122227A1 (en) * 2007-11-08 2009-05-14 Rohm And Haas Denmark Finance A/S Integrated backlight illumination assembly
KR20100000799A (ko) * 2008-06-25 2010-01-06 엘지디스플레이 주식회사 액정표시장치의 도광판 제조방법
JP2010091646A (ja) 2008-10-06 2010-04-22 Toray Ind Inc 光学用フィルムおよびその製造方法
CN101380820A (zh) * 2008-10-08 2009-03-11 中国化学工业桂林工程有限公司 宽幅胶片挤出压延机组
US8317384B2 (en) * 2009-04-10 2012-11-27 Intellectual Discovery Co., Ltd. Light guide film with cut lines, and optical keypad using such film
DE102009027288A1 (de) 2009-06-29 2010-12-30 Evonik Röhm Gmbh Lichtleitplatte mit eingebetteten lichtstreuenden Störstellen und Verfahren zu dessen Herstellung
CN201494019U (zh) * 2009-08-19 2010-06-02 常州金海塑业有限公司 一种门幅可调式塑料加工模具
US20120051696A2 (en) 2010-04-08 2012-03-01 Evonik Roehm Gmbh Light guide body having high luminous intensity and high transparency

Also Published As

Publication number Publication date
TW201238745A (en) 2012-10-01
EP2651618A2 (de) 2013-10-23
MX336822B (es) 2016-02-03
JP2014502568A (ja) 2014-02-03
TWI623409B (zh) 2018-05-11
KR20130101131A (ko) 2013-09-12
HK1187306A1 (zh) 2014-04-04
DE102010062900A1 (de) 2012-06-14
BR112013014768A2 (pt) 2016-10-04
IL226887A (en) 2017-06-29
CN103328182A (zh) 2013-09-25
KR101714115B1 (ko) 2017-03-08
JP5930326B2 (ja) 2016-06-08
CN103328182B (zh) 2016-04-13
WO2012079865A3 (de) 2012-09-27
WO2012079865A4 (de) 2012-11-15
WO2012079865A2 (de) 2012-06-21
US9442237B2 (en) 2016-09-13
KR20150119481A (ko) 2015-10-23
US20130343088A1 (en) 2013-12-26

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