EP4161782A1 - Procédé pour fabriquer un corps multicouche et corps multicouche - Google Patents

Procédé pour fabriquer un corps multicouche et corps multicouche

Info

Publication number
EP4161782A1
EP4161782A1 EP21728180.7A EP21728180A EP4161782A1 EP 4161782 A1 EP4161782 A1 EP 4161782A1 EP 21728180 A EP21728180 A EP 21728180A EP 4161782 A1 EP4161782 A1 EP 4161782A1
Authority
EP
European Patent Office
Prior art keywords
layer
grid
base film
microlens
transfer
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.)
Pending
Application number
EP21728180.7A
Other languages
German (de)
English (en)
Inventor
Violetta Olszowka
Benjamin HASSE
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.)
Leonhard Kurz Stiftung and Co KG
Original Assignee
Leonhard Kurz Stiftung 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 Leonhard Kurz Stiftung and Co KG filed Critical Leonhard Kurz Stiftung and Co KG
Publication of EP4161782A1 publication Critical patent/EP4161782A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/342—Moiré effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing

Definitions

  • the adhesive prefferably has two layers and an SiOx vapor deposition, the SiOx vapor deposition being applied to the microlenses of the base film; and wherein the first layer comprises a mixture of acrylates and polyurethanes with an application weight in a range from 0.5 g / m 2 to 8 g / m 2 , selected from: polyacrylate dispersion, for example ethylene-acrylic acid copolymer dispersion, aliphatic polyurethane dispersion , aliphatic polyether polyurethane dispersion; and wherein the second layer comprises a UV-crosslinking polyurethane dispersion with an application weight in a range from 0.5 g / m 2 to 8 g / m 2.
  • polyacrylate dispersion for example ethylene-acrylic acid copolymer dispersion, aliphatic polyurethane dispersion , aliphatic polyether polyurethane dispersion
  • the second layer comprises a UV-crosslinking polyure
  • the at least one transfer layer provides second optical information, in particular optically variable information.
  • the second optical information item is different from the first optical information item.
  • the second optical information is an optical effect, selected individually or in combination from: virtually appearing effect image, colored effect image, achromatic effect image, movement effect, 3D effect, lens effect, micro-motif, nano-motif, depth effect, color change, contrast change, image change , variable shadows and / or similar effects.
  • the base film is designed as a laminating film, hot stamping film or cold stamping film and is applied to the target substrate using a method that is suitable for the respective type of film.
  • an adhesive is used in step c) selected from: single-layer adhesive, multilayer adhesive, aqueous-based adhesive, solvent-based adhesive, radiation-curing adhesive, thermally activated adhesive, or combinations thereof.
  • the adhesive is part of the at least one transfer layer 10 as an adhesive layer, whereas during cold stamping the adhesive is preferably applied to the surface of the base film 20, preferably to the surface of the first layer 21 of the base film 20, by means of a printing process.
  • the one or more image areas and the background area have different polarization properties.
  • the micro-image grid in the first area has at least two micro-images that differ from one another.
  • FIG. 2b also shows a schematic representation of a method for producing a multilayer body 40.
  • the method shown in FIG. 2b comprises essentially the same steps as the method in FIG. 2a, but with the difference that after step a) the following further steps The following step is carried out: a1) applying the base film 20 to a target substrate 30.
  • transfer layer 10 can be applied in a decentralized manner; for example, it is thus possible for the customer to apply individually designed transfer layers 10 to the multilayer body 40. This also creates a great variety of designs.
  • an identical or similar refractive index in particular a refractive index which differs by at most 0.4, preferably a refractive index that differs by at most 0.2, is preferably achieved using the same or similar materials or classes of substances.
  • many polymeric binders can also be used. Such binders have a similar refractive index which is approximately in a range from 1.3 to 1.7, preferably approximately 1.5.
  • the first optical information can be deleted if the base film 20, in particular if the first layer 21 and / or the second layer 22, has the same material as the transfer layer 10 and / or if the first layer 21 and / or the second layer 22, predominantly polymers comprise similar or identical to the adhesive layer of the transfer sheet 10.
  • FIG. 4b shows a further embodiment variant for applying a multi-layer body 40 to a target substrate 30.
  • the multi-layer body 40 has a base film 20, comprising a first layer 21 in which microlenses are molded, and one below in some areas the second layer 22, which is arranged on the first layer 21 and provides the microimages.
  • the multilayer body 40 also has two transfer layers 10, the first transfer layer 10 being arranged above the first layer 21 in the area in which the second layer 22 is not present, and the second transfer layer 10 in the area in which the second layer 22 is not present, is arranged below the first layer 21.
  • first layer (microlens elements) 22 second layer (micro images)

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé pour fabriquer un corps multicouche (40) et un corps multicouche. Le procédé de fabrication d'un corps multicouche comprend les étapes suivantes : fourniture d'au moins une feuille de base (20); fourniture d'au moins une feuille de transfert; application au moins partielle d'au moins une couche de transfert (10) de la feuille de transfert sur et/ou sous la feuille de base (20). Le corps multicouche (40) comporte au moins une feuille de base (20) et au moins une couche de transfert (10) d'une feuille de transfert appliquée sur et/ou sous la feuille de base (20).
EP21728180.7A 2020-06-05 2021-05-17 Procédé pour fabriquer un corps multicouche et corps multicouche Pending EP4161782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020114967.0A DE102020114967A1 (de) 2020-06-05 2020-06-05 Verfahren zum Herstellen eines Mehrschichtkörpers sowie einen Mehrschichtkörper
PCT/EP2021/062986 WO2021244842A1 (fr) 2020-06-05 2021-05-17 Procédé pour fabriquer un corps multicouche et corps multicouche

Publications (1)

Publication Number Publication Date
EP4161782A1 true EP4161782A1 (fr) 2023-04-12

Family

ID=76159416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21728180.7A Pending EP4161782A1 (fr) 2020-06-05 2021-05-17 Procédé pour fabriquer un corps multicouche et corps multicouche

Country Status (3)

Country Link
EP (1) EP4161782A1 (fr)
DE (1) DE102020114967A1 (fr)
WO (1) WO2021244842A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005414A1 (de) 2007-01-30 2008-08-07 Ovd Kinegram Ag Sicherheitselement zur Sicherung von Wertdokumenten
AU2009303884A1 (en) 2008-10-17 2010-04-22 Crane & Co., Inc. Security device with at least one durable tactile marking
DE102009032697C5 (de) * 2009-07-09 2020-03-05 Ovd Kinegram Ag Mehrschichtkörper
DE102009040975A1 (de) 2009-09-11 2011-03-24 Ovd Kinegram Ag Mehrschichtkörper
DE102016109193A1 (de) * 2016-05-19 2017-11-23 Ovd Kinegram Ag Verfahren zur Herstellung von Sicherheitselementen mit einem Lenticular Flip

Also Published As

Publication number Publication date
DE102020114967A1 (de) 2021-12-09
WO2021244842A1 (fr) 2021-12-09

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