EP1991031A1 - Pâte à imprimer et son utilisation pour la fabrication d'une feuille électroluminescente - Google Patents

Pâte à imprimer et son utilisation pour la fabrication d'une feuille électroluminescente Download PDF

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Publication number
EP1991031A1
EP1991031A1 EP20070107710 EP07107710A EP1991031A1 EP 1991031 A1 EP1991031 A1 EP 1991031A1 EP 20070107710 EP20070107710 EP 20070107710 EP 07107710 A EP07107710 A EP 07107710A EP 1991031 A1 EP1991031 A1 EP 1991031A1
Authority
EP
European Patent Office
Prior art keywords
paste
printing
printing paste
electroluminescent
mass fraction
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.)
Withdrawn
Application number
EP20070107710
Other languages
German (de)
English (en)
Inventor
Manfred Hartmann
Andreas Nübler
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.)
Schreiner Group GmbH and Co KG
Original Assignee
Schreiner Group GmbH and Co KG
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 Schreiner Group GmbH and Co KG filed Critical Schreiner Group GmbH and Co KG
Priority to EP20070107710 priority Critical patent/EP1991031A1/fr
Priority to US12/599,184 priority patent/US20100209724A1/en
Priority to PCT/EP2008/055656 priority patent/WO2008135595A1/fr
Publication of EP1991031A1 publication Critical patent/EP1991031A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/20—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31935—Ester, halide or nitrile of addition polymer

Definitions

  • the present invention relates to a printing paste, in particular a printing paste for the production of an electroluminescent layer on a thermoformable plastic film. Furthermore, the present invention relates to a method for producing an electroluminescent film in which an electroluminescent layer is produced on a thermoformable plastic film.
  • Electroluminescent films with inorganic luminescent pigments are widely used as flat illuminants, for example for the backlighting of displays, the backlighting of control elements and the like.
  • the structure of an electroluminescent film always comprises a film substrate, two electrode layers and an electroluminescent layer arranged between the electrode layers, which contains the electroluminophores.
  • the latter are often microencapsulated, incorporated into a binder matrix and can be composed, for example, of zinc sulfides which, depending on doping or co-doping and preparation process, produce different, relatively narrow-band emission spectra.
  • the luminescence is caused by an alternating electric field, which is created by applying the electrode layers to an AC voltage source.
  • electroluminescent films are constructed by printing technology, i. a suitable, possibly already conductive coated (such as ITO vapor-deposited or sputtered) plastic film substrate is printed with the necessary to create an electroluminescent structure layers.
  • the technology used so far often reaches its limits, especially if the molded surfaces are also to be back-injected to improve the mechanical stability and to better seal against environmental influences.
  • the conventionally preferably used printing pastes require high drying temperatures, which often prevents or at least severely restricts the use of heat-sensitive plastic film substrates. In the rear injection with hot masses, the problem is compounded.
  • the present invention is therefore based on the object to provide opportunities for printing in particular good deformable and hinterspritzbarer electroluminescent, and thereby allow the user as possible free choice of material when using the Kunststoffoliensubstrats.
  • this object is achieved by means of a printing paste according to claim 1.
  • Advantageous embodiments may be designed according to one of claims 2-7.
  • the underlying object is achieved by a method according to claim 8.
  • Advantageous embodiments of the method according to the invention can be configured according to one of claims 9-24.
  • the underlying object by an electroluminescent film according to claim 25.
  • any variant of the invention described or indicated in the context of the present application may be particularly advantageous, depending on the economic and technical conditions in the individual case.
  • individual features of the described embodiments are interchangeable or can be combined with one another and also with measures known per se from the prior art.
  • FIG. 1 a deep-drawable electroluminescent film which can be produced by a process according to the invention.
  • the illustrated example makes it possible to provide a deep drawable, re-sprayable electroluminescent film, i. in particular, to design an electroluminescent layer structure such that it can also be printed on heat-sensitive materials such as, for example, PMMA, PVC and (in particular not heat-stabilized) PC. Also for the creation of a backlighting of lenticular sheets, the invention is particularly suitable.
  • the application of the individual layers can be carried out batchwise or continuously in strip mode. A mixture of both modes is possible.
  • an at least partially transparent or even clear plastic substrate 1 is provided, which is provided with a conductive layer 2.
  • a conductive layer 2 This can be generated beforehand by printing with a water-based organic conductive ink (or otherwise applying the same).
  • the substrate thickness may preferably be 175 to 800 micrometers.
  • the electroluminescent layer 3 is applied. Under certain circumstances, however, it may be advantageous to apply a non-conductive intermediate layer (not shown) before the electroluminescent layer 3 is produced.
  • a printing paste is used, which is preferably applied to the conductive layer 2 (or the above-mentioned intermediate layer) by means of screen printing, but possibly also with another suitable technique.
  • the basis of the printing paste is a known, transparent, acrylate-based UV printing varnish, as it is commercially available in many types, for example under the name DMU TYPE (2240563_02) (manufacturer COATES SCREEN INKS GmbH) .
  • An advantageous composition may comprise 25-50% of monoalkyl or monoaryl or monoalkylaryl esters of acrylic acid, 25-50% of other acrylates and 10-25% of 1-vinyl-2-pyrrolidine (EC No. 201-800-4; CAS-No 88-12-0) (in percentage by mass).
  • the UV printing varnish is mixed with the latter at least in the ratio of two parts by weight to three parts by weight of electroluminophores (also referred to as EL phosphors or luminescent pigments).
  • the highest Anpaststor is two parts by weight of electroluminophores to a part of printing ink, otherwise there is no sufficient adhesion to the substrate.
  • a phthalic acid plasticizer (commercially available, for example, Benzyloctyl phthalate type Santicizer 261A from the supplier Ferro) is added in a proportion of at least 0.2% by weight to at most 1.5% by weight.
  • the paste is printed directly onto the conductive layer 2 of water-based organic conductive ink, it is preferred to use a silane coupling agent in order to achieve good adhesion and temperature resistance (also against about 265 ° C hot injection molding compound with subsequent back molding).
  • This has two different activatable molecule branches. One side reacts with the atoms on the printed Leitlack Mrs 2 to a solid compound. The other side reacts with the resin molecules of the printing paste.
  • the minimum amount of adhesion promoter to the printing paste is 0.1 Weight percent; the maximum amount added is 0.7 weight percent to ensure ductility.
  • the dielectric layer 4 is formed.
  • the dielectric paste is preferably selected a similar composition as for the printing paste.
  • a filler preferably a mixture of barium titanate and titanium dioxide, is used here.
  • the barium titanate content should be at least 80 percent by weight.
  • the remaining 20 percent of titanium dioxide serve for white pigmentation, as a result of which the dielectric layer 4 also has the function of a reflector layer.
  • Minimum paste ratio is two parts by weight of filler to one part by weight (acrylate-based, UV-curable) pressure varnish. The maximum pasting ratio is 13 to 5 parts by weight.
  • a plasticizer in particular a plasticizer of the type mentioned above is also added here. A particularly good homogenization is possible with this mixture with a three-roll mill with the smallest possible gap width adjustment and multiple passes.
  • the back electrode 5 can advantageously be produced by applying (preferably by pressure) a highly filled silver conductive paste already used for conventional electroluminescent elements.
  • a highly filled silver conductive paste reflects UV radiation so strongly that drying through at belt speeds of about three meters per minute, which is advantageous in order to avoid excessive substrate heating, is no longer guaranteed.
  • the pressure of the back electrode 5 in two thin layers with the addition of a photoinitiator in an amount of 0.1 weight percent to a maximum of 2 weight percent can be done here.
  • the initiator is in particular a mixture of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 2,4,6-Trimethylbenzoyldiphenylphosphinoxid in question, if the emission width of commercial emitters to be covered.
  • the selected photoinitiator excess accelerates the reactivity and at the same time improves the ink adhesion by better pronounced depth hardening.
  • the photoinitiator is yellowing free and thus does not affect the color location of the electroluminescent film used as a light source.
  • electroluminescent sheet printed above it is preferable to pre-dry the electroluminescent sheet printed above as before the deforming of the electroluminescent sheet and, if appropriate, subsequent injection of the deformed electroluminescent sheet at 50 ° C. for at least 48 hours, in order to avoid bubble formation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
EP20070107710 2007-05-08 2007-05-08 Pâte à imprimer et son utilisation pour la fabrication d'une feuille électroluminescente Withdrawn EP1991031A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20070107710 EP1991031A1 (fr) 2007-05-08 2007-05-08 Pâte à imprimer et son utilisation pour la fabrication d'une feuille électroluminescente
US12/599,184 US20100209724A1 (en) 2007-05-08 2008-05-07 Printing paste and the use thereof for the production of an electroluminescent film
PCT/EP2008/055656 WO2008135595A1 (fr) 2007-05-08 2008-05-07 Pâte d'impression et son utilisation pour produire une feuille électroluminescente

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070107710 EP1991031A1 (fr) 2007-05-08 2007-05-08 Pâte à imprimer et son utilisation pour la fabrication d'une feuille électroluminescente

Publications (1)

Publication Number Publication Date
EP1991031A1 true EP1991031A1 (fr) 2008-11-12

Family

ID=38331409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070107710 Withdrawn EP1991031A1 (fr) 2007-05-08 2007-05-08 Pâte à imprimer et son utilisation pour la fabrication d'une feuille électroluminescente

Country Status (3)

Country Link
US (1) US20100209724A1 (fr)
EP (1) EP1991031A1 (fr)
WO (1) WO2008135595A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012020009A1 (fr) * 2010-08-13 2012-02-16 Tesa Se Elément luminescent, en particulier emboutissable
US9301367B2 (en) 2011-12-19 2016-03-29 Inoviscoat Gmbh Luminous elements with an electroluminescent arrangement and method for producing a luminous element
US20170029694A1 (en) * 2011-04-14 2017-02-02 Canon Kabushiki Kaisha Imprint material

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130171903A1 (en) 2012-01-03 2013-07-04 Andrew Zsinko Electroluminescent devices and their manufacture
ITMI20130369A1 (it) * 2013-03-12 2014-09-13 Gianfranco Chiarabini Mezzo di trasporto a propulsione umana, anche servoassistita
US9642212B1 (en) 2015-06-11 2017-05-02 Darkside Scientific, Llc Electroluminescent system and process
AU2017302241B2 (en) 2016-07-28 2022-06-23 Darkside Scientific, Inc. Electroluminescent system and process
CN112670430A (zh) * 2020-12-24 2021-04-16 广东彩乐智能包装科技有限公司 一种纸基电致发光器件及制备方法
CN113831844A (zh) * 2021-08-16 2021-12-24 江西合力泰科技有限公司 一种户外uv型保护屏及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01200595A (ja) 1987-10-30 1989-08-11 Nippon Kasei Kogyo Kk 分散型ｅｌ素子の発光層，絶縁体層形成用ペースト及び該ペーストを用いたｅｌ素子
EP0915482A1 (fr) 1997-11-05 1999-05-12 Imation Corp. Ecran intensificateur de rayons-x amélioré
WO2001025342A1 (fr) 1999-10-06 2001-04-12 Uv Specialities, Inc. Compositions polymerisables aux uv utilisees pour produire des revetements electroluminescents
EP1568750A2 (fr) * 2004-02-27 2005-08-31 H.C. Starck GmbH Dispositif électroluminescent déformable

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6767577B1 (en) * 1999-10-06 2004-07-27 Allied Photochemical, Inc. Uv curable compositions for producing electroluminescent coatings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01200595A (ja) 1987-10-30 1989-08-11 Nippon Kasei Kogyo Kk 分散型ｅｌ素子の発光層，絶縁体層形成用ペースト及び該ペーストを用いたｅｌ素子
EP0915482A1 (fr) 1997-11-05 1999-05-12 Imation Corp. Ecran intensificateur de rayons-x amélioré
WO2001025342A1 (fr) 1999-10-06 2001-04-12 Uv Specialities, Inc. Compositions polymerisables aux uv utilisees pour produire des revetements electroluminescents
EP1568750A2 (fr) * 2004-02-27 2005-08-31 H.C. Starck GmbH Dispositif électroluminescent déformable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012020009A1 (fr) * 2010-08-13 2012-02-16 Tesa Se Elément luminescent, en particulier emboutissable
US20170029694A1 (en) * 2011-04-14 2017-02-02 Canon Kabushiki Kaisha Imprint material
US9301367B2 (en) 2011-12-19 2016-03-29 Inoviscoat Gmbh Luminous elements with an electroluminescent arrangement and method for producing a luminous element

Also Published As

Publication number Publication date
US20100209724A1 (en) 2010-08-19
WO2008135595A1 (fr) 2008-11-13

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