Laminated pane with a holographic element and method for producing the same

Patent metadata

Field	Value
Publication number	US-12521968-B2
Application number	US-202118010410-A
Country	US
Kind code	B2
Filing date	Jun 10, 2021
Priority date	Jun 15, 2020
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A laminated pane includes first and second panes, a layer stack arranged therebetween including a first thermoplastic intermediate layer, a separating layer, a photopolymer layer with at least one holographic element, a carrier layer, and a second thermoplastic intermediate layer, wherein the photopolymer layer has a thickness of 5 μm to 50 μm, the carrier layer contains polyethylene terephthalate (PET), polyethylene (PE), polymethyl methacrylate (PMMA), polycarbonate (PC), polyamide (PA), polyvinyl chloride (PVC), and/or cellulose triacetate (TAC) and has a thickness of 20 μm to 100 μm, wherein the carrier layer is arranged directly adjacent the photopolymer layer, and the separating layer contains polyethylene (PE), polyvinyl chloride (PVC), and/or polymethyl methacrylate (PMMA) and has a thickness of 10 μm to 300 μm.

First claim

The invention claimed is:

1 . A laminated pane, comprising a first pane, a second pane, a layer stack arranged therebetween, consisting of the following layers in order from the first pane to the second pane: a first thermoplastic intermediate layer, a separating layer, a photopolymer layer with at least one holographic element, a carrier layer, and a second thermoplastic intermediate layer, wherein
the photopolymer layer has a thickness of 5 μm to 50 μm, the carrier layer contains polyethylene terephthalate (PET), polyethylene (PE), polymethyl methacrylate (PMMA), polycarbonate (PC), polyamide (PA), polyvinyl chloride (PVC), and/or cellulose triacetate (TAC) and has a thickness of 20 μm to 100 μm, wherein the carrier layer is arranged directly adjacent the photopolymer layer, the separating layer contains polyethylene (PE), polyvinyl chloride (PVC), and/or polymethyl methacrylate (PMMA) and has a thickness of 10 μm to 300 μm.

2 . The laminated pane according to claim 1 , wherein the thickness of the photopolymer layer is between 8 μm and 30 μm.

3 . The laminated pane according to claim 2 , wherein the thickness of the photopolymer layer is between 10 μm and 20 μm.

4 . The laminated pane according to claim 1 , wherein the carrier layer consists essentially of polyethylene terephthalate (PET), polyethylene (PE), polymethyl methacrylate (PMMA), polycarbonate (PC), polyamide (PA), polyvinyl chloride (PVC), or cellulose triacetate (TAC).

5 . The laminated pane according to claim 4 , wherein the carrier layer consists essentially of polyamide (PA).

6 . The laminated pane according to claim 1 , wherein the carrier layer has a thickness of 40 μm to 90 μm.

7 . The laminated pane according to claim 6 , wherein the carrier layer has a thickness of 65 μm to 80 μm.

8 . The laminated pane according to claim 1 , wherein the separating layer consists essentially of polyethylene (PE), polyvinyl chloride (PVC), or polymethyl methacrylate (PMMA).

9 . The laminated pane according to claim 8 , wherein the separating layer consists of polymethyl methacrylate (PMMA).

10 . The laminated pane according to claim 1 , wherein the separating layer has a thickness of 40 μm to 200 μm.

11 . The laminated pane according to claim 10 , wherein the separating layer has a thickness of 65 μm to 150 μm.

12 . Laminated pane according to claim 1 , wherein the first thermoplastic intermediate layer and/or the second thermoplastic intermediate layer contain or consist essentially of polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU), or copolymers or derivatives thereof.

13 . The laminated pane according to claim 1 , wherein the first pane and/or the second pane are made of glass.

14 . The laminated pane according to claim 13 , wherein the first pane and/or the second pane are made of soda lime glass.

15 . A projection assembly comprising a laminated pane according to claim 1 and a projector that is aimed at the holographic element, wherein the projector is a laser projector.

16 . A method for producing a laminated pane according to claim 1 , comprising:
a) providing a first pane, a first thermoplastic intermediate layer, a second thermoplastic intermediate layer, a separating layer, and a second pane, b) providing a photopolymer layer having a holographic optical element, wherein the photopolymer layer is applied on a carrier layer, c) forming a layer stack is formed with the following sequence of layers and panes: first pane—first thermoplastic intermediate layer—separating layer—a photopolymer layer having a holographic element—carrier layer—second thermoplastic intermediate layer—second pane, d) laminating the layer stack.

17 . A method comprising providing a laminated pane according to claim 1 as interior glazing or exterior glazing in a vehicle or a building.

18 . The method according to claim 17 , wherein the laminated pane is a vehicle pane in vehicle of locomotion for travel on land, in the air, or on water.

19 . The method according to claim 18 , wherein the laminated pane is a windshield that serves as a projection surface.

Assignees

• Saint Gobain
• Saint Gobain Sekurit France

Inventors

• Gomer Andreas
• Perlewitz Raphaela
• Ceripa Adrien
• Krekel Daniel

Classifications

• G03H2270/11

  Crystal or glass (G03H2270/55 takes precedence) · CPC title

• G03H2260/12

  Photopolymer · CPC title

• G03H1/0256

  having specific functional layer · CPC title

• G02B27/0103

  comprising holographic elements · CPC title

• B32B2605/00

  Vehicles · CPC title