Method for producing a laminated body and a laminating film and laminated body and laminating film

Patent metadata

Field	Value
Publication number	US-11780257-B2
Application number	US-201917058404-A
Country	US
Kind code	B2
Filing date	May 20, 2019
Priority date	May 25, 2018
Publication date	Oct 10, 2023
Grant date	Oct 10, 2023

Abstract

A method for producing a laminated body and a laminating inlay, as well as a laminated body, a laminating inlay and a security document, in particular in the form of a bank card, identity card or credit card, with such a laminated body.

First claim

The invention claimed is:

1. A method for producing a laminated body wherein the method comprises the following steps:
providing a first laminating film, with a first surface and a second surface opposite it,
providing at least one transfer film, which comprises in each case a carrier film and a decorative ply which is detachable from the carrier film and has a first surface opposite the carrier film and a second surface facing the carrier film,
printing a radiation-curable adhesive on the first surface of the first laminating film and/or the first surface of the decorative ply of the at least one transfer film in such a way that the radiation-curable adhesive is applied to the respective first surface of the first laminating film and/or the decorative ply in one or more first zones and forms a radiation-curable adhesive layer in the one or more first zones, and is not applied to the respective first surface of the first laminating film and/or the respective decorative ply in one or more second zones such that the adhesive layer is present in only the one or more first zones,
applying the at least one transfer film to the first surface of the first laminating film in such a way that at least one partial region of the one or more first zones with the radiation-curable adhesive layer and at least one partial region of the one or more second zones, in which the radiation-curable adhesive layer is not applied, are arranged between the first surface of the respective decorative ply and the first surface of the first laminating film,
completely curing the entire radiation-curable adhesive layer present on the first surface of the first laminating film and/or the decorative ply in a single step so that no regions of the adhesive layer are left uncured,
peeling the at least one transfer film off the first laminating film, wherein, in one or more first partial regions which overlap with at least one of the first zones at least in regions the decorative ply is detached from the carrier film when peeled off and remains on the first laminating film, and in one or more second partial regions the decorative ply remains on the carrier film and is peeled off with the carrier film so that the decorative ply is transferred wherever adhesive is present, and
laminating several successive films to form the laminated body, the several successive films comprising:
the first laminating film with the one or more first partial regions with the decorative ply;
a second laminating film arranged facing the first surface of the first laminating film; and
a third laminating film arranged facing the second surface of the first laminating film, the third laminating film comprising polyvinyl chloride or polycarbonate,

wherein, during the laminating, the second laminating film is applied to the first laminating film in such a way that, in a first region of surface, one or more of the first partial regions with the decorative ply and the radiation-curable adhesive layer are arranged between the first surface of the first laminating film and a first surface of the second laminating film facing the first surface of the first laminating film, and wherein, in a second region of surface, the first surfaces of the first laminating film and of the second laminating film touch, and
wherein, during the laminating, the first surfaces of the first laminating film and the second laminating film are fused to each other at least over part of the surface in the second region of surface, and
wherein the area ratio of the first region of surface to the sum of first and second regions of surface is not more than 80%, and
wherein the method further comprises the step of introducing a lasered partial region into at least one of the first laminating film, the second laminating film and the third laminating film, and
wherein the decorative ply comprises:
an HRI layer applied over a full surface area of the decorative ply; and
a metal layer applied over a partial area of the full surface area of the decorative ply.

2. The method according to claim 1 , wherein the area ratio of the first region of surface to the second region of surface is chosen such that the adhesion between the first and the second laminating film after the laminating is more than 3.5 N.

3. The method according to claim 1 , wherein one or more of the second partial regions are delimited by an outer edge of the laminated body and have a width of more than 2 mm.

4. A method for producing a laminating inlay, wherein the method comprises the following steps:
providing a first laminating film, with a first surface and a second surface opposite it,
providing at least one transfer film, which comprises in each case a carrier film and a decorative ply which is detachable from the carrier film and has a first surface opposite the carrier film and a second surface facing the carrier film,
printing a radiation-curable adhesive on the first surface of the first laminating film and/or the first surface of the decorative ply of the at least one transfer film in such a way that the radiation-curable adhesive is applied to the respective first surface of the first laminating film and/or the decorative ply in one or more first zones and forms a radiation-curable adhesive layer in the one or more first zones, and is not applied to the respective first surface of the first laminating film and/or the decorative ply in one or more second zones,
applying the at least one transfer film to the first surface of the first laminating film in such a way that at least one partial region of the one or more first zones with the radiation-curable adhesive layer and at least one partial region of the one or more second zones in which the radiation-curable adhesive layer is not applied are arranged between the first surface of the decorative ply and the first surface of the laminating film,
at least partially curing the radiation-curable adhesive layer,
peeling the at least one transfer film off the first laminating film, wherein, in one or more first partial regions which overlap with at least one of the first zones at least in regions, the decorative ply is detached from the carrier film when peeled off and remains on the first laminating film, and in one or more second partial regions the decorative ply remains on the carrier film and is peeled off with the carrier film,
wherein an area ratio of the one or more first partial regions to a sum of the one or more first partial regions and the one or more second partial regions is not more than 80%, and
wherein a minimum spacing between several first partial regions is more than 1 mm, and
wherein the one or more first partial regions and/or the one or more second partial regions have a width of 0.1 mm or more, and
wherein the first surface of the laminating film has a surface roughness Ra of less than 1 μm and a gloss level at an angle of 60° according to ISO 2813 of more than 98 GU, and
wherein the decorative ply comprises:
an HRI layer applied over a full surface area of the decorative ply; and
a metal layer applied over a partial area of the full surface area of the decorative ply.

5. The method according to claim 4 , wherein, in the printing, a radiation-curable adhesive is printed which has a higher softening temperature than the first laminating film after the curing has been carried out.

6. The method according to claim 4 , wherein the printing of the radiation-curable adhesive is effected with an application weight of between 0.2 g/m 2 and 20 g/m 2 .

7. The method according to claim 4 , wherein the radiation-curable adhesive is printed with a dynamic viscosity of between 400 mPas and 2,000 mPas.

8. The method according to claim 4 , wherein the printing is effected by means of flexographic pri

Assignees

• Ovd Kinegram Ag

Inventors

• Hoffmann Michael
• Staub René

Classifications

• B42D25/47 Primary

  using adhesives · CPC title

• B32B37/025

  Transfer laminating · CPC title

• B42D25/378

  Special inks · CPC title

• B32B2037/1253

  curable adhesive · CPC title

• B42D25/24

  Passports · CPC title