Polymer Laminate Comprising at Least One Diffraction Element and Method for Producing it

Patent metadata

Field	Value
Publication number	US-2021283941-A1
Application number	US-201716321701-A
Country	US
Kind code	A1
Filing date	Jul 21, 2017
Priority date	Jul 29, 2016
Publication date	Sep 16, 2021
Grant date	—

Abstract

A production method for a polymer laminate with at least one diffraction element is simplified. The method includes the following method steps: providing a diffraction element material with a carrier film and a light-sensitive layer located thereon, and also at least one polymer layer; producing the at least one diffraction element by creating a light-diffracting layer from the light-sensitive layer, in that a light-diffracting pattern is created in the light-sensitive layer of the at least one diffraction element material; bringing together the at least one diffraction element and at least one polymer layer to form a stack of layers; and surface bonding the at least one diffraction element and the at least one polymer layer 170 by way of a lamination process, thereby forming the polymer laminate.

First claim

1 - 14 . (canceled)

15 . A method for producing a polymer laminate, the method comprising the following steps:
(a) providing a diffraction element material having a carrier film and a light-sensitive layer on said carrier film, and at least one polymer layer; (b) producing at least one diffraction element by producing a light-diffracting pattern in the light-sensitive layer of the at least one diffraction element material to thereby create a light-diffracting layer from the light-sensitive layer; (c) bringing together the at least one diffraction element and the at least one polymer layer to form a stack of layers; and (d) surface bonding the at least one diffraction element and the at least one polymer layer by a lamination process, to thereby form the polymer laminate with the at least one diffraction element.

16 . The method according to claim 15 , wherein method step comprises bonding the at least one diffraction element and the at least one polymer layer to each other without using an additional adhesive material.

17 . The method according to claim 15 , wherein the diffraction element material additionally has a scratch-resistant layer arranged on a side of the light-sensitive layer opposite the carrier film.

18 . The method according to claim 17 , which comprises, in steps and, retaining the scratch-resistant layer on the light-diffracting layer as a component of the polymer laminate to be produced.

19 . The method according to claim 15 , wherein step comprises arranging the at least one diffraction element on an outer side of the stack of layers.

20 . The method according to claim 19 , wherein step comprises arranging the light-diffracting layer on a side of the carrier film of the at least one diffraction element in the stack of layers that is opposite the at least one polymer layer.

21 . The method according to claim 19 , wherein:
step comprises arranging the carrier film on a side of the light-diffracting layer of the at least one diffraction element in the stack of layers that is opposite the at least one polymer layer, and the method further comprises, subsequent to step: embossing microoptical elements in a material of the carrier film.

22 . The method according to claim 15 , wherein the carrier film is formed with polycarbonate or is composed of polycarbonate.

23 . The method according to claim 15 , wherein the at least one polymer layer is formed with polycarbonate or is composed of polycarbonate.

24 . The method according to claim 15 , wherein the at least one polymer layer is one of a plurality of polymer layers and at least one of the polymer layers is formed with polycarbonate or is composed of polycarbonate.

25 . The method according to claim 15 , wherein the diffraction element material includes a protective film arranged on a side of the light-sensitive layer opposite the carrier film, and the method further comprises, subsequent to step:
(b1) peeling of the protective film from the light-sensitive layer.

26 . The method according to claim 15 , which comprises providing at least one of the polymer layers with data.

27 . The method according to claim 26 , which comprises applying the data to the at least one of the polymer layers simultaneously with a production of the at least one diffraction element from the diffraction element material.

28 . The method according to claim 15 , which comprises producing a value or security product.

29 . A polymer laminate, comprising:
a plurality of polymer layers; and at least one diffraction element bonded to the polymer layers without additional adhesive material.

30 . A value or security product, comprising a polymer laminate produced by the method according to claim 15 .

Assignees

• Covestro Deutschland Ag

Inventors

• Leopold Andre
• Kulikovska Olga
• Kluender Kathrin
• Paeschke Manfred
• Orselli Enrico
• Roelle Thomas
• Hovestadt Wieland
• Hoenel Dennis

Classifications

• G02B5/1847

  Manufacturing methods · CPC title

• B42D25/455 Primary

  using heat · CPC title

• B42D25/328 Primary

  Diffraction gratings; Holograms · CPC title

• B42D25/46

  using pressure · CPC title

• B42D25/23 Primary

  Identity cards · CPC title