Method for producing a laminating component or a hologram component in order to produce a composite glass, and corresponding laminating components, hologram components, and composite glasses

Abstract

The invention relates to a method for producing a laminating component or a hologram component. A holographic material, such as a holographic film, is connected either to a laminating agent in order to form a laminating component or to a transparent reinforcing material in order to form a hologram component In order to produce a composite glass, the laminating component or the hologram component can then be laminated between two glass panes, which can be curved in particular. By virtue of the laminating agent of the laminating component or the reinforcing material of the hologram component, damage to the hologram imprinted in the holographic material can be prevented or reduced.

Description

[0001] Description

[0002] Method for producing a laminated component or a hologram component, for producing a laminated glass, and corresponding laminated components, hologram components and laminated glasses

[0003] The present application relates to methods for producing laminating components, which can then be used for laminating glass panes to produce laminated glass, as well as for producing hologram components, which can also be used in laminated glass production. Furthermore, the present application relates to corresponding laminating components, hologram components, and laminated glass.

[0004] Laminated glass, i.e., glass in which several individual glass panes are bonded, is used for various applications, such as safety glass in the automotive sector. Such laminated glass can be manufactured, for example, in an autoclave, i.e., by thermal treatment under pressure. In particular, to produce laminated safety glass, one or more plastic films are placed between one or more glass panes and baked together in an autoclave to form a composite. The glass panes can also be bent to create laminated glass with a desired curved freeform, as required, for example, for automotive applications. Windshields, for example, typically have a curved shape.In the context of this application, a curved freeform, also referred to as a 2D curved form, refers to surface shapes that cannot be converted into a flat form by unfolding, such as the surfaces of spheres or ellipsoids.

[0005] For various applications, it is desirable to incorporate holograms into such laminated glass panes. For example, such holograms can be used for data projection, as described, for example, in WO2016 / 146697 A1. Such holograms are often provided as hologram foils, in which a hologram is provided in the form of exposed photosensitive material on a carrier foil or between two carrier foils. If such conventional hologram foils are inserted between the glass panes for the autoclave process, the problem arises that the hologram foils soften considerably during heating in the autoclave and can slip, particularly due to shear stresses caused by the curvature of the panes, causing the hologram foils to crumple. This destroys the optical function of the holograms.A similar behavior is observed when the laminated glass is produced by loosely laying the various materials, for example in a layer stack of glass - laminating agent such as polyvinyl butyral (PVB) or ethylene vinyl acetate (EVA) - hologram film - laminating agent - glass.

[0006] An alternative approach is described in DE 102019 130 022 A1 or DE 10 2020 112 447 A1. Here, individual panes of a pane composite to be holographically functionalized are first coated with an unexposed photopolymer, for example, in liquid form. Subsequently, exposure occurs through a contact copy with a master hologram, followed by fixation (curing) of the exposed photopolymer. Only then is the laminated glass produced. While this process solves the problem of crumpling of hologram foils described above, it is very complex in terms of exposure technology, making implementation for mass production correspondingly expensive.

[0007] It is therefore an object of the present application to provide improved possibilities for the production of laminated glasses with built-in holograms.

[0008] A method for producing a laminated component according to claim 1, a method for producing a hologram component according to claim 14, a laminated component according to claim 18, a hologram component according to claim 20, a method for producing a laminated glass according to claim 22, and a laminated glass according to claim 28 or 29 are provided. The subclaims define further embodiments.

[0009] According to a first aspect, a method for producing a laminating component for joining two glass sheets is provided, comprising: providing a laminating agent, and bonding the laminating agent to a holographic material

[0010] The lamination component thus creates an intermediate product that contains both a holographic material and a laminating agent. The laminating agent serves both to laminate and stabilize or stiffen the holographic material in a subsequent lamination process. It can at least partially prevent crumpling or other damage to the hologram during the lamination process when producing laminated glass.

[0011] A laminating agent is generally understood to be a substance that can create a bond between two glass panes in a lamination process, for example, in an autoclave. Such laminating agents can be, for example, thermoplastics such as polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), or corresponding copolymers thereof.

[0012] In one variant, the holographic material is a hologram foil, wherein the provision of the laminating agent and the bonding of the laminating agent to the holographic material then comprises applying the laminating agent to at least one side, preferably to two opposite sides, of the hologram foil. Such application can, for example, involve extrusion. In this way, a layer system consisting of the laminating agent and the hologram foil is produced, whereby the laminating agent can, in turn, stabilize the hologram foil material during application.

[0013] A hologram foil is generally a foil comprising a carrier material and an exposed or unexposed photosensitive material on the carrier material or between two layers of carrier material. For example, the carrier material can be a thermoplastic such as acrylic glass (PMMA) or polycarbonate (PC) with layer thicknesses between 50 and 150 μm, and a photopolymer as the photosensitive material with layer thicknesses between 10 and 100 μm. These values ​​are merely examples, and other conventional hologram foils can also be used. Overall, hologram foils typically have a thickness between 20 and 500 μm.

[0014] In the case where the laminating agent is applied to two opposite sides of the hologram foil, the thickness of the laminating agent on a first side of the two opposite sides can be at least 1.25 times, for example at least 1.5 times, the thickness of the laminating agent on a second side of the two opposite sides. As will be explained further below, such a laminating component, when placed with an appropriate orientation between two curved or to-be-curved glass panes, is advantageous for absorbing stresses.

[0015] The holographic material can comprise a hologram, i.e., already have an exposed hologram, or it can be a photosensitive material into which a hologram can be subsequently exposed. In particular, a laminating component can be provided with a pre-exposed hologram.

[0016] In another alternative, bonding the laminating agent to the holographic material involves incorporating a photosensitive material into the laminating agent. Here, the chemical composition of the laminating agent is expanded to include photosensitive material. For this purpose, crosslinkable monomers, initiators, dye systems, and co-initiators, or generally light-curing chemicals, such as those described in EP1438634 B1, can be added as additives during the production of the laminating agent, for example, as a film. The laminating agent can be polyvinyl butyral, ethylene-vinyl acetate, or a copolymer thereof, as described above. This creates a film from the laminating agent that can be simultaneously exposed to a hologram.The resulting laminated component is then initially stored in a light-protected environment before a hologram is exposed, for example, using a conventional replication process with a master hologram. After the holograms are exposed, the material is fixed, i.e., cured, by bleaching or thermal post-treatment.

[0017] In yet another embodiment, a multilayer system of laminating agent and photosensitive material is produced directly, for example by coextrusion. For example, a film stack is produced in this way in which a photopolymer as described in EP1438634 B1 is sandwiched between two layers of polyvinyl butyral, ethylene vinyl acetate, or copolymers thereof. This creates an exposable film stack, which can then be subjected to exposure with subsequent fixing as described above. In a second aspect, a method for producing a hologram component is provided, comprising:

[0018] Providing a hologram foil, and

[0019] Bonding the hologram foil with a transparent stiffening material that has a thickness between 0.5mm and 5mm.

[0020] This transparent stiffening material can comprise, for example, plastic types such as some thermoplastics, some types of polyvinyl chloride, cross-linked epoxy resins or polyester resins, polyamide (PA) 6-3T, polycarbonate, polyetherimide, polyethersulfone, polyethylene terephthalate (PET) with nucleating additives, acrylic glass (PMMA), polysulfone, polystyrene, or styrene-acrylonitrile copolymer. The hologram film can be applied to the transparent stiffening material or embedded into it using an appropriate adhesive (OCA, optically clear adhesive). The plastics are preferably amorphous plastics and are preferably thermoplastic or have a softening point, but no melting point, in the range of process temperatures for the subsequent production of laminated glass panes (particularly in an autoclave).The transparent stiffening material becomes "doughy" during a subsequent lamination process, allowing it to bend and conform to the shape of the glass, but not melt. This prevents the hologram film from creasing, as the transparent stiffening material serves to stabilize it. The hologram film can also be coated with a transparent stiffening material on both sides.

[0021] The method for producing the laminating component according to the first aspect or the hologram component according to the second aspect can be designed to provide a laminating component or hologram component which ensures that, during a later use described below for producing a particularly curved laminated glass, the holographic material or the hologram foil is located in the so-called neutral fiber of the particularly curved pane composite. The neutral fiber in a curved body is located where the material of the body - in this case preferably the hologram foil - is neither compressed nor stretched during bending. This can be achieved, for example, by appropriately selecting the thickness of the laminating agent, in particular on both sides of the holographic material as described above, or of the stiffening material.A corresponding laminating component, which is produced, for example, using the method according to the first aspect, is provided according to a third aspect. Such a laminating component for joining two glass panes comprises a laminating agent and a holographic material as described above. All variants described above for the manufacturing method can also be applied accordingly to the laminating component; i.e., the laminating agent can, for example, be arranged on one or both sides of the holographic material, or the laminating agent can be mixed with a photosensitive material, which is then exposed.

[0022] Furthermore, according to the above method for producing a hologram component according to a fourth aspect, a corresponding hologram component is provided, i.e., a hologram component comprising a hologram foil and a transparent stiffening material bonded to the hologram foil, which has a thickness between 0.5 mm and 5 mm. Here, too, the various features and variants of the manufacturing method described above also apply to the hologram component.

[0023] According to a fifth aspect, there is provided a method for producing a laminated glass comprising:

[0024] Arranging a component selected from the group consisting of the laminating component as described above and the hologram component as described above between a first glass sheet and a second glass sheet, and laminating the first glass sheet to the second glass sheet.

[0025] If the component is the laminating component, lamination can be achieved by heating the laminating agent of the laminating component. If the component is the hologram component, a laminating agent can additionally be arranged between the hologram component and the first and second glass sheets.

[0026] Laminating can be done in particular in an autoclave.

[0027] The laminated glass produced can have a curved target geometry (i.e., the geometry after production). The curvature can be achieved, for example, during heating in the autoclave.

[0028] In particular, the component can be the laminating component as mentioned above, in which a laminating agent is thinner on a first side than on a second side. In this case, the arrangement can be such that the first side of the laminating component rests against a concavely curved or to-be-curved side of the first glass pane, and the second side of the laminating component rests against a convexly curved or to-be-curved side of the second glass pane. This can distribute any shear stresses that occur so that the holographic material is minimally disturbed, for example, creased, during the lamination process.

[0029] In addition, a corresponding laminated glass is provided, which comprises a first glass pane, a second glass pane laminated to the second glass pane, and a hologram component arranged between the first glass pane and the second glass pane as described above, i.e., a hologram component with a hologram film and a transparent stiffening material bonded to the hologram film as explained above. Furthermore, a laminated glass is also provided, comprising: a first glass pane, a second glass pane laminated to the first glass pane, and a laminating component (20, 28, 40) arranged between the first glass pane and the second glass pane, comprising: a laminating agent, and a holographic material bonded to the laminating agent. These laminated glasses can, in particular, be curved. The hologram component or the laminating component of the laminated glass can be manufactured or configured as explained above.

[0030] For further explanation, various embodiments are explained in more detail below with reference to the accompanying drawings. They show:

[0031] Fig. 1 is a flowchart illustrating methods according to various embodiments,

[0032] Figures 2A and 2B are diagrams illustrating methods and components of various embodiments,

[0033] Fig. 3 is a diagram illustrating the distribution of stresses in some embodiments,

[0034] Fig. 4 shows a laminating component according to an embodiment,

[0035] Fig. 5 shows a laminated glass according to an embodiment, and Figures 6A and 6B are diagrams illustrating the incorporation or application of a hologram foil into or onto a carrier material.

[0036] Various embodiments are explained in detail below. This description is for illustrative purposes only and should not be construed as limiting.

[0037] Like reference numerals in different embodiments indicate like or corresponding components, which are not described in detail repeatedly. Variations, modifications, and details described for one embodiment are also applicable to other embodiments, unless otherwise stated.

[0038] Figure 1 shows an overall process according to various embodiments, including a process for producing a laminated component, a process for producing a hologram component, and a process for producing a laminated glass using the laminated component or hologram component. The production of the laminated component or hologram component can be carried out separately from the production of the laminated glass, e.g., at a different location or by a different company. Figures 2 to 6 further illustrate the process of Figure 1 and show, among other things, corresponding laminated components, hologram components, and laminated glasses.

[0039] In a first alternative of Fig. 1, a laminating agent is provided in step 10. As already explained above, a laminating agent is a material that is placed between two glass panes to produce laminated glass, with the laminated glass being produced by subsequent heating. As already explained, the laminating agent can comprise polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), or copolymers thereof.

[0040] In step 11, the laminating agent is then combined with a holographic material. The holographic material can, for example, be a hologram film, which, as already explained above, can be constructed as a layer stack, for example a layer stack of 100 pm polycarbonate followed by 20 pm of a photopolymer followed by 125 pm polycarbonate, or 60 pm acrylic glass film (PMMA) followed by 80 pm photopolymer followed by 60 pm PMMA film, just to give two examples. In the embodiments described here, the thickness of the hologram films can be between 10 and 500 pm. The product of the thickness of the holographically suitable layer (photopolymer) of the hologram films in pm and the achievable refractive index AN by exposing the photopolymer can be in the range from 0.1 to 0.9. This value can be achieved by using a thicker photopolymer or by a larger refractive index jump.

[0041] A hologram can be imprinted into the hologram film, particularly the photopolymer. The result of steps 10 and 11 is a lamination component, which is then inserted between two glass panes in step 14, which are then laminated in step 15 in a lamination process, for example, in an autoclave. The glass panes can be bent to produce a laminated glass with a desired curved shape.

[0042] Examples of this process will now be explained with reference to Figures 2 (including sub-figures 2A and 2B), 3 and 4.

[0043] In the example of Fig. 2A, to implement steps 10 and 11 of Fig. 1, a layer 22 of the laminating agent, here PVB, EVA, or a copolymer thereof, is extruded onto a hologram film 21. This creates a laminating component 20. This laminating component is then placed between a first glass pane 24 and a second glass pane 26, wherein the first glass pane 24 is also provided with a laminating agent (PVB and / or EVA) 25 to form a block 23, and wherein the laminating agent 22 of the laminating component 20 faces the second glass pane 26. This stack is then laminated to form a laminated glass in an autoclave process, as indicated by an arrow 27. The thickness of the layers of laminating agent 22, 25 (PVB / EVA films) can be between 125 and 600 μm, and the glass panes can have a thickness of up to 3 mm or more, up to 2 mm, or up to 1 mm. This also applies to the embodiments described below in Fig.2B and 3-6, unless otherwise noted.

[0044] By first providing the hologram film 21 with the laminating agent 22 in a separate step, the laminating agent 22 can stabilize the hologram film 21 during the autoclave process, for example by absorbing stresses arising when the glass panes 24, 26 are bent. Fig. 2B shows a modification of Fig. 2A. Here, the laminating agent 25, which in the case of Fig. 2A is a separate film or bonded to glass 24, is also extruded onto the second side of the hologram film 21 to form a laminating component 28. This laminating component 28 is then arranged between the first glass pane 24 and the second glass pane 26 and laminated in an autoclave process, again indicated by arrow 27, to form a laminated glass.

[0045] The thickness of the laminating agent 22 of Fig. 2A or the thicknesses of the laminating agents 22, 25 of Fig. 2B, which are applied to the hologram foil 21, can be determined by the intended curvature of the glass panes 24, 26. The hologram foil 21 can, in particular, comprise a pre-exposed hologram. The distortions to which the hologram foil 21 is exposed during the autoclave process are minimal when the hologram foil is located in the so-called neutral fiber of the curved pane composite. The neutral fiber in a curved body is located where the material of the body—in this case, preferably the hologram foil—is neither compressed nor stretched during bending.

[0046] In one embodiment, the thicknesses of the laminating means 22, 55 are different. Preferably, the side of the hologram foil 21 that lies against a concavely curved glass side in the subsequent laminated glass is provided with a thicker layer of the laminating means, while the side of the hologram foil that lies against a convexly curved glass side in the laminated glass is provided with a thinner film (for example, approximately 1 mm).

[0047] This is illustrated with reference to Fig. 3. Here, the layer of laminating agent 22 lies against the concavely curved glass side of the glass pane 26, while the layer of laminating agent 25 lies against a convexly curved side of the glass pane 24. The layer of laminating agent 22 is therefore thicker than the layer of laminating agent 25, for example at least 1.25 times thicker or 1.5 times thicker. In the autoclave process, the layers of laminating agents 22, 25 become doughy, and thus the laminating agent 22 can easily absorb and compensate for the shear stress associated with the increasing deformation of the glass panes. In other words, the hologram film 21 is pressed more evenly against the convexly curved side of the glass pane 24 by the uniform pressure of the thicker laminating agent 22.Thick arrows 31 in the laminating agent 22 indicate that it can follow the shear direction / shear stress well, while thinner arrows 30 indicate that the respective parts can follow the shear direction less well. Thus, the laminating agent adjacent to the hologram foil 21 is less strongly affected, and thus also the hologram foil itself. In this way, wrinkling of the hologram foil can be reduced.

[0048] In addition to extruding laminating agent onto a hologram foil, there are other possibilities for producing the laminating component according to steps 10 and 11. In one alternative, a layer stack such as for the laminating component 20 of Fig. 2A or 28 of Fig. 2D is produced by coextruding laminating agent together with photosensitive material instead of extruding the laminating agent onto the hologram foil. This means that instead of the hologram foil 21 in Figs. 2A and 2B, only photosensitive material is coextruded together with laminating agent. The laminating agent then also fulfills the function of the carrier foil in conventional hologram foils. As already explained at the beginning, such a coextrudate must then be exposed accordingly.

[0049] In another variant, shown in Fig. 4, photosensitive material, i.e., light-curing chemicals, for example, as described in EP1438634B1, is added as an additive during the production of the laminating agent. This results in a laminating agent film that is also photosensitive and can be exposed to corresponding hologram structures. After exposure, the film is then fixed in a conventional manner. The resulting laminating component can then be used in an autoclave, as described above, to produce a laminated glass, in particular a curved one.

[0050] In this variant of Fig. 1, comprising steps 10 and 11, a laminating agent is combined with holographic material to form a laminating component. The laminating agent also stabilizes the holographic material. In a second approach, which will now be described again with reference to Fig. 1, a hologram foil is provided with a stiffening material before being laminated between glass panes.

[0051] Thus, the second approach of Fig. 1 comprises providing a hologram foil in step 12. The stiffening material can be a plate with a thickness between 0.5 and 5 mm, for example approximately 2 mm. Materials for the stiffening material can be certain polyvinyl chloride (PVC) types, COC, cross-linked epoxy resins or polyester resins (PA6-3-T, polycarbonate, polyetherimide, polyethersulfone, PET with nucleating additives, acrylic glass (PMMA), polysulfone, polystyrene, or a styrene-acrylonitrile copolymer. The connection between the hologram foil and the stiffening material can be made with an appropriate adhesive, in particular a so-called OCA (optically clear adhesive). The plastics used for the stiffening material can in particular be amorphous plastics, since in the case of semi-crystalline plastics, the degree of crystallinity could increase due to heating in the autoclave, which could lead to clouding.This can be partially prevented by nucleating additives.

[0052] In exemplary embodiments, the stiffening material is preferably thermoplastic or has a softening point, but no melting point, in the range of the intended process temperatures for the production of the laminated glass. In other words, the stiffening material softens, for example, in the above-mentioned autoclave process, but does not melt, and can thus stabilize the hologram film throughout the process. The adhesive (OCA) is also preferably selected so that it remains completely transparent at the process temperatures and retains its adhesive properties.

[0053] The hologram component thus created in steps 12 and 13 can then be positioned between two glass panes. Unlike the first variant of steps 10 and 11, an additional laminating agent (e.g., PVB and / or EVA) is placed between the hologram component and the glass panes. Then, in step 15, the lamination process takes place again in an autoclave.

[0054] Fig. 5 shows an example of a layer stack as it exists after step 14 of the variant via steps 12 and 13. In Fig. 5, a hologram foil 21 is arranged on a stiffening material 50. The stiffening material can be designed as described above. The hologram component 51 thus formed is arranged between the already described first glass plate 24 and the second glass plate 26 with the lamination means 25 or 22 in between, as also already described. While in Fig. 5 the stiffening material 50 is arranged on one side of the hologram foil 21, in other embodiments the hologram foil 21 can also be arranged between two plates of stiffening material. In addition, the hologram foil 21 can be glued to the stiffening material 50 or embedded in it, as explained in Figures 6A and 6B. In Fig.In Fig. 6A, the hologram foil 21 is secured in a recess in the stiffening material 50 by means of OCA 60, while in Fig. 6B, the hologram foil 21 is glued to the stiffening material 50 by means of OCA 60. In both cases, a second stiffening material 50 can be applied to the hologram foil, for example, by means of another OCA layer.

[0055] It should be noted that, while the production of laminated glasses with two glass panes was described above, laminated glasses with more than two glass panes can also be produced, wherein, for example, the laminating component or hologram component can be arranged between two of the glass panes as described, or several laminating components or hologram components can be arranged between different glass panes, and other glass panes can be laminated in a conventional manner.

Claims

Patent claims Method for producing a laminating component (20, 28, 40) for joining two glass sheets (24, 26), comprising: Providing a laminating agent (22, 25) and combining the laminating agent (22, 25) with a holographic material. The method of claim 1, wherein the laminating agent (22, 25) comprises polyvinyl butyral, ethylene vinyl acetate, or a copolymer thereof. The method of claim 1, wherein the holographic material comprises a holographic film (21), and wherein providing the laminating agent (22, 25) and combining the laminating agent (22, 25) with the holographic material comprises applying the laminating agent (22, 25) to at least one side of the holographic film (21). The method of claim 3, wherein the application comprises extrusion. The method of claim 3 or 4, wherein the laminating agent (22, 25) is applied to two opposite sides of the holographic film (21).A method according to claim 5, wherein the thickness of the laminating agent (22) on a first side of the two opposite sides is at least 1.25 times the thickness of the laminating agent (25) on a second side of the two opposite sides. A method according to claim 5 or 6, wherein the thicknesses of the laminating agent (22, 25) on the two opposite sides are selected such that, when a laminated glass is produced using the laminating agent, the holographic material is located in the neutral fiber of the laminated glass. A method according to any one of claims 1 to 7, wherein the holographic material comprises a hologram. A method according to claim 1 or 2, wherein combining the laminating agent (22, 25) with the holographic material comprises incorporating a photosensitive material into the laminating agent. A method according to claim 1 or 2, wherein combining the laminating agent (22, 25) with the holographic material comprises producing a multilayer system of laminating agent (22, 25) and photosensitive material. A method according to claim 10, wherein the production comprises co-extrusion. A method according to any one of claims 9 to 11, further comprising imprinting a hologram into the photosensitive material. A method according to any one of claims 1 to 12, wherein the laminating component (20, 28, 40) is produced such that, during the production of laminated glass using the laminating agent, the holographic material is located in the neutral fiber of the laminated glass.Method for producing a hologram component (51), comprising: providing a hologram foil (21), and. Combining the holographic film with a transparent stiffening material (50) having a thickness between 0.5 mm and 5 mm. A method according to claim 14, wherein the transparent stiffening material (50) comprises at least one transparent plate, the holographic film (21) being attached to the transparent plate with an adhesive (60). A method according to claim 14, wherein the at least one transparent plate comprises a first transparent plate and a second transparent plate, the holographic film (21) being arranged between the first transparent plate and the second transparent plate. A method according to any one of claims 14 to 16, wherein the holographic component (51) is manufactured such that, during the production of laminated glass using the laminating agent, the holographic film is located in the neutral fiber of the laminated glass. Laminating component (20, 28, 40) for bonding two glass panes, comprising: a laminating agent (22, 25), and a holographic material bonded to the laminating agent. Laminating component (20, 28, 40) according to claim 15, manufactured by the method according to any one of claims 1 to 13. Hologram component (51), comprising: a holographic film (21), and a transparent stiffening material bonded to the holographic film (21). (50), having a thickness between 0.5 mm and 5 mm. Hologram component (51) according to claim 20, produced by the method according to any one of claims 14 to 17. Method for producing laminated glass, comprising: Arranging a component selected from the group consisting of the lamination component (20, 28, 40) according to claim 18 or 19 and the hologram component (51) according to claim 20 or 21 between a first glass pane (26) and a second glass pane (24), and Laminating the first glass pane (24) to the second glass pane (26). Method according to claim 22, wherein the component is the laminating component (20, 28, 40), and wherein the lamination is carried out by heating the laminating agent (22, 25) of the laminating component (20, 28, 40). Method according to claim 22, wherein the component is the hologram component (51) and wherein the method further comprises arranging a laminating agent (22, 25) between the hologram component (51) and the first and second glass panes (24, 26), wherein the lamination is carried out by heating the laminating agent. A method according to any one of claims 22 to 24, wherein the lamination is carried out in an autoclave. A method according to any one of claims 22 to 25, wherein the method comprises bending to produce a curved laminated glass. A method according to claim 26, wherein the component is the laminating component (20, 28, 40) produced according to claim 6, wherein the first side of the laminating component (20, 28, 40) abuts a concavely curved or to-be-curved side of the first glass pane (26) and the second side of the laminating component (20, 28, 40) abuts a convexly curved or to-be-curved side of the second glass pane (24).Laminated glass comprising: a first glass pane (26), a second glass pane (24) laminated to the first glass pane (26), and a holographic component (51) arranged between the first glass pane (26) and the second glass pane (24), the holographic component comprising a holographic film (21) and a transparent stiffening material (50) connected to the holographic film (21), the stiffening material having a thickness between 0.5 mm and 5 mm. Laminated glass comprising: a first glass pane (26), a second glass pane (24) laminated to the first glass pane (26), and a laminating component (20, 28, 40) arranged between the first glass pane (26) and the second glass pane (24), comprising: a laminating agent (22, 25), and a holographic material connected to the laminating agent.

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