WO2019166210A1

WO2019166210A1 - Composite pane having an element reflecting infrared radiation

Info

Publication number: WO2019166210A1
Application number: PCT/EP2019/053294
Authority: WO
Inventors: Jefferson DO ROSARIO; Michael Labrot; Florian Manz
Original assignee: Saint-Gobain Glass France
Priority date: 2018-02-28
Filing date: 2019-02-11
Publication date: 2019-09-06
Also published as: CN110418715A

Abstract

The invention relates to a composite pane (100) with an element (4) reflecting infrared radiation, at least comprising a stacking sequence formed by an outer pane (1), a first thermoplastic polymer intermediate layer (3a) and an inner pane (2), and an element (4) reflecting infrared radiation in the form of an XIR bilayer including a first thermoplastic polymer layer (4a) and a carrier film arranged thereon in the direction of the inner pane (2) or the outer pane (1) and having a coating (4b) reflecting infrared radiation, or in the form of an XIR trilayer including a first thermoplastic polymer layer (4a), a second thermoplastic polymer layer (4c) and a carrier film arranged between the first layer (4a) and the second layer (4c) and having a coating (4b) reflecting infrared radiation, wherein the first thermoplastic polymer intermediate layer (3a) is arranged between the outer pane (1) and the inner pane (2) and has a recess region (5) in which the element (4) reflecting the infrared radiation is arranged.

Description

Composite pane with infrared radiation reflecting element

The invention relates to a composite pane with an infrared radiation reflecting element, a method for its production and its use.

Wheels in the automotive sector, which are equipped with a coating reflecting infrared radiation, are well known to the person skilled in the art. Such coatings reduce unwanted heating of the interior due to solar radiation due to their infrared radiation reflecting properties.

Infrared-reflective coatings often have good electrical conductivity that allows heating of the coating so that the disk can be kept free of ice and condensation. The coatings comprise electrically conductive layers, in particular silver-based. The coatings are usually electrically contacted with two busbars (also known as bus bars or busbars), between which a current flows through the heatable coating. This type of heating is described, for example, in WO 03/024155 A2, US 2007/0082219 A1 and US 2007/0020465 A1, which disclose layer systems comprising a plurality of silver layers which further reduce the sheet resistance of the conductive coating. Such coatings are not only electrically heated, but also have infrared radiation-reflecting properties, whereby heating of the vehicle interior is reduced, especially in long service life of a vehicle. These layer systems are thus of particular importance not only with regard to safety-relevant aspects, such as an unrestricted view, but also from an ecological point of view, such as a reduction in pollutant emissions, and an improvement in vehicle comfort.

Methods such as magnetic field-assisted sputtering for depositing such layer systems are well known to those skilled in the art. The deposition of the transparent infrared radiation-reflecting electrically conductive coating can be carried out either on one of the inner sides of the outer pane or the inner pane or on a carrier foil which is inserted between the panes. The direct deposition of the coating on one of the disk surfaces is advantageous from an economic point of view, especially in the case of production of large quantities, while the use of a carrier film with infrared radiation-reflecting coating allows a much greater flexibility in terms of production.

In order to prevent corrosion of the infrared radiation-reflecting coating by moisture and environmental influences and to avoid wrinkling, a cutback of the carrier film is made in the edge region.

EP 1 029 662 B1 discloses a curved transparent composite pane comprising at least two fixed panes and a multilayer laminate of at least one thin-filmed carrier foil and outer adhesive layers arranged therebetween, and an edge strip bordering the visible surface of the composite pane on at least one side Material, wherein the carrier film is cut back with infrared radiation reflective coating in the edge region of the composite pane.

From WO 2017/068076 A1, a composite disk is known, in which a carrier film with a coating reflecting infrared radiation is arranged between two laminating films. In addition, a method for producing such a composite pane is disclosed, in which, prior to the application of the second laminating film, the carrier film with infrared-reflective coating is removed at least in one edge area of the composite pane.

EP 2 010 385 B1 discloses a multi-layer glazing for use as a vehicle window, which comprises two panes, which are connected to one another by at least three layers of intermediate material, and an infrared radiation, which is arranged between the panes controllable functional element is arranged in a recess region in the third layer of the intermediate layer material and the third layer of the intermediate layer material between the first and the second layer of the intermediate layer material is arranged.

It is an object of the present invention to provide an improved composite disk having an infrared ray reflecting member and an improved method of manufacturing a composite glass with an infrared ray reflecting member. The object of the present invention is achieved by a composite pane with an infrared radiation-reflecting element according to independent claim 1 and by a method according to independent claim 14. Preferred embodiments will become apparent from the dependent claims.

A composite pane according to the invention comprises at least:

A stacking sequence of an outer pane, a first thermoplastic polymeric intermediate layer and an inner pane, and

• an infrared radiation reflecting element

wherein the first thermoplastic polymeric interlayer is disposed between the outer pane and the inner pane and has a recess portion in which the infrared ray reflecting element is disposed.

In the composite pane according to the invention, the outer pane and the inner pane have at least one thermoplastic polymeric interlayer, i. connected to each other at least via a first thermoplastic polymeric intermediate layer.

According to the invention, the infrared radiation-reflecting element is an XIR bilayer comprising a first layer and a carrier film with infrared radiation-reflecting coating arranged thereon in the direction of the inner pane or in the direction of the outer pane or an XIR trilayer comprising a first layer, a second layer and a carrier film arranged therebetween with infrared radiation reflective coating. In the case of the XIR bilayer, the infrared-radiation-reflecting coating is arranged on the inside between the carrier film and the first layer and / or is arranged on the outside of the carrier film. When the infrared radiation-reflecting coating is arranged on the inside between the carrier foil and the first layer, the infrared-reflective coating is protected against scratches and, with the exception of the edges, against corrosion.

The first layer of the XIR bilayer is a thermoplastic polymeric layer which preferably contains at least polyvinyl butyral (PVB), ethylene vinyl acetate (EVA) and / or polyurethane (PU), more preferably polyvinyl butyral (PVB). The layer may also be tinted or colored. The thickness of the first thermoplastic polymer layer is preferably from 0.2 mm to 2 mm, more preferably from 0.3 mm to 1 mm, for example, 0.38 mm or 0.76 mm. The carrier film preferably contains polyethylene terephthalate (PET), Polyethylene (PE) and / or mixtures and / or copolymers and / or derivatives thereof. Particularly preferably, the carrier film is a PET film. The carrier film preferably has a thickness of 5 μm (microns), up to 500 μm, particularly preferably 10 μm to 200 μm, for example 50 μm or 75 μm or 100 μm. The thickness of the infrared radiation reflecting coating is at most 1 pm, preferably much less.

The first layer and the second layer of the XIR trilayer are thermoplastic polymer layers and preferably formed from the same material and preferably contain at least polyvinyl butyral (PVB), ethylene vinyl acetate (EVA) and / or polyurethane (PU), more preferably polyvinyl butyral (PVB). The layers can also be tinted or colored independently of each other. The thickness of the first and second thermoplastic polymer layers is independently of each other preferably from 0.2 mm to 2 mm, particularly preferably from 0.3 mm to 1 mm, for example 0.38 mm or 0.76 mm. The carrier film, which is arranged between the first and the second thermoplastic polymer layer, preferably contains polyethylene terephthalate (PET), polyethylene (PE) and / or mixtures and / or copolymers and / or derivatives thereof. Particularly preferably, the carrier film is a PET film. The carrier film preferably has a thickness of 5 μm (microns), up to 500 μm, particularly preferably 10 μm to 200 μm, for example 25 μm, 50 μm or 75 μm or 100 μm. The thickness of the infrared radiation reflecting coating is at most 1 pm, preferably much less.

Infrared radiation reflecting elements as XIR bilayer or XIR trilayer are commercially available. The infrared radiation reflective element to be integrated is typically cut out of an XIR bilayer or XIR trilayer of larger dimensions in the desired shape and size. This can be done mechanically, for example with a knife. Alternatively, the cutting can be done by means of a laser or a plotter.

The infrared radiation-reflecting element is arranged in the recess region of the first thermoplastic polymer intermediate layer, ie, the first thermoplastic polymer intermediate layer is formed like a frame and arranged around the infrared radiation-reflecting element. The first thermoplastic polymer interlayer need not necessarily be formed from one piece. It can also be formed from several sections, which together form a frame. The sections consequently surround the recess area in the manner of a frame, in which the infrared radiation-reflecting element is arranged. Preferably, the first thermoplastic polymeric interlayer is formed from one piece.

Due to the first thermoplastic polymer intermediate layer, which surrounds the infrared radiation-reflecting element like a frame, the infrared radiation-reflecting element is protected from corrosion. In addition, the wrinkling of the infrared radiation-reflecting element is reduced in particular for strongly curved composite disks, since the infrared radiation-reflecting element does not reach into the edge region of the composite pane.

The dimensions of the recess area in the first thermoplastic polymer intermediate layer preferably correspond substantially to the dimensions of the infrared radiation-reflecting element, so that the infrared radiation-reflecting element is arranged flush in the recess. This can minimize blistering when laminating the composite disk. The dimensions of the recess region in particular deviate a maximum of 0.5%, preferably a maximum of 0.2% from the dimensions of the infrared radiation-reflecting element.

The thickness of the first thermoplastic polymer intermediate layer is preferably from 0.2 mm to 2 mm, particularly preferably from 0.3 mm to 1 mm, for example 0.38 mm or 0.76 mm.

In an advantageous embodiment, the thickness of the first thermoplastic polymer intermediate layer essentially corresponds to the thickness of the infrared radiation-reflecting element. This means in particular that the thickness of the first thermoplastic polymer intermediate layer corresponds to the thickness of the infrared radiation-reflecting element or deviates by at most 15%, preferably at most 10%, particularly preferably at most 5% from the thickness of the infrared radiation-reflecting element.

By receiving the infrared radiation reflecting element in the recess region of the first thermoplastic polymer intermediate layer of the local thickness difference of the composite disc, which is introduced by the localized infrared radiation reflecting element compensated, so that glass breakage during lamination and / or permanent stresses in the glass can be avoided.

The infrared-reflective coating preferably contains silver and / or an electrically conductive oxide, more preferably silver, titanium dioxide, aluminum nitride and / or zinc oxide, with very particular preference given to the use of silver.

In one embodiment of the composite pane according to the invention, the infrared radiation-reflecting coating is transparent. In the context of the invention, a transparent coating is understood in particular to mean a coating which has a light transmission of greater than 70% in the spectral range from 380 nm to 780 nm. It is therefore a coating that is intended and suitable to be applied substantially on the entire surface of the disc, the transparency is maintained. Such a coating is particularly suitable for windshields.

The known in the automotive field infrared radiation reflective coatings generally have at the same time a very good electrical conductivity, which allows heating of the disc by applying an electrical voltage to the coating. The infrared radiation-reflecting coating according to the invention is, in a preferred embodiment, an electrically conductive coating. The infrared radiation-reflecting electrically conductive coating has at least one electrically conductive layer. The coating may additionally have dielectric layers which serve, for example, for regulating the sheet resistance, for corrosion protection or for reducing the reflection. The conductive layer preferably contains silver or an electrically conductive oxide (transparent conductive oxide, TCO) such as indium tin oxide (ITO). The conductive layer preferably has a thickness of 10 nm to 200 nm. In order to improve the conductivity while at the same time providing high transparency, the coating may have a plurality of electrically conductive layers, which are separated from one another by at least one dielectric layer. The conductive coating may include, for example, two, three or four electrically conductive layers. Typical dielectric layers include oxides or nitrides, for example silicon nitride, silicon oxide, aluminum nitride, aluminum oxide, zinc oxide or titanium oxide. Such infrared radiation-reflecting electrically conductive coatings are not limited to an application in heatable embodiments of the composite pane. Also in Discs without a heating function are used for said infrared radiation-reflecting, electrically conductive coatings, the coating in this case alone fulfilling the task of sun protection.

In a particularly preferred embodiment, the infrared radiation-reflecting electrically conductive coating has at least one electrically conductive layer which contains silver, preferably at least 99% silver. The layer thickness of the electrically conductive layer is preferably from 5 nm to 50 nm, particularly preferably from 10 nm to 30 nm. The coating preferably has two or three of these conductive layers, which are separated from one another by at least one dielectric layer. Such coatings are particularly advantageous with regard to the transparency of the disc and to its conductivity.

The sheet resistance of the infrared radiation-reflecting electrically conductive coating is preferably from 0.5 ohms / square to 7.5 ohms / square. This advantageous heat outputs are achieved at voltages commonly used in the vehicle, with low sheet resistance at the same applied voltage lead to higher heat outputs.

Examples of layer structures which likewise have a high electrical conductivity and an infrared radiation-reflecting effect are known to the person skilled in the art from WO 2013/104439 and WO 2013/104438.

In an advantageous embodiment of a composite pane according to the invention, a second thermoplastic polymeric intermediate layer is arranged between the first thermoplastic polymeric intermediate layer, in the recess region of which the infrared radiation-reflecting element is arranged, and the inner pane. In this embodiment, the infrared radiation-reflecting element is preferably formed as an XIR bilayer.

The thickness of the second thermoplastic polymer intermediate layer is preferably from 0.2 mm to 2 mm, particularly preferably from 0.3 mm to 1 mm, for example 0.38 mm or 0.76 mm.

Preferably, between the second thermoplastic polymeric intermediate layer and the first thermoplastic polymeric intermediate layer, in the recess region of the Infrared radiation reflecting element is arranged, a third thermoplastic polymer interlayer arranged. The third thermoplastic polymer intermediate layer has a recess region in which a functional element with electrically controllable properties is arranged. In this embodiment, the infrared radiation-reflecting element is preferably formed as an XIR trilayer.

The thickness of the third thermoplastic polymer intermediate layer preferably corresponds substantially to the thickness of the functional element. This means, in particular, that the thickness of the third thermoplastic polymer intermediate layer corresponds to the thickness of the functional element or differs by not more than 15%, preferably not more than 10%, particularly preferably not more than 5%, from the thickness of the functional element.

In one embodiment, the thickness of the third thermoplastic polymer intermediate layer corresponds exactly to the thickness of the functional element or is 0.01 mm to 0.05 mm, for example 0.02 mm, less than the thickness of the functional element. For example, the thickness of the functional element may be 0.4 mm and the thickness of the third thermoplastic polymer intermediate layer 0.38 mm.

The inclusion of the functional element in the recess area of the third thermoplastic polymer intermediate layer compensates for the local thickness difference of the composite pane introduced by the localized functional element, so that glass breakage during lamination and / or permanent stresses in the glass can be avoided.

The dimensions of the recess area in the third thermoplastic polymer intermediate layer, with a rectangular recess area, in particular the length and width of the recess area in the third thermoplastic polymer intermediate layer, substantially correspond to the dimensions of the functional element so that the infrared radiation-reflecting element is arranged flush in the recess. The dimensions, in particular the length and width, of the recess area deviate in particular at most 0.5%, preferably at most 0.2%, from those of the functional element.

In one embodiment of the composite disc according to the invention is between the first thermoplastic polymeric intermediate layer and the third thermoplastic polymer Intermediate layer arranged a fourth thermoplastic polymeric interlayer. In this embodiment, the infrared radiation-reflecting element is preferably formed as XIR bilayer.

The thickness of the fourth thermoplastic polymer intermediate layer is preferably from 0.2 mm to 2 mm, particularly preferably from 0.3 mm to 1 mm, for example 0.38 mm or 0.76 mm.

In one embodiment of the composite pane according to the invention, a stacking sequence of a functional element having electrically controllable properties, a fifth thermoplastic polymeric intermediate layer and a sixth thermoplastic polymeric intermediate layer is arranged between the first thermoplastic polymeric intermediate layer and the inner pane. In this stacking sequence, the fifth thermoplastic intermediate layer is arranged between the functional element and the sixth thermoplastic intermediate layer. In addition, the sixth thermoplastic intermediate layer has a recess region in which the fifth thermoplastic intermediate layer is arranged in sections. The functional element in this embodiment is arranged, as seen in phantom, entirely within the recess area of the sixth thermoplastic polymeric interlayer and substantially in a different plane than the sixth thermoplastic polymeric interlayer. This means that the functional element is arranged in the region of the orthogonal projection of the recess area with respect to the outer pane.

Substantially in a different plane than the sixth thermoplastic polymeric interlayer means that at least 80%, preferably at least 85%, more preferably at least 90%, most preferably at least 95% of the functional element is disposed in a different plane than the sixth thermoplastic polymeric interlayer ,

In one embodiment, the composite disc of the present invention has a second thermoplastic polymeric interlayer between the first thermoplastic polymeric interlayer and the inner disk and is stacked between either the inner disk and the second thermoplastic polymeric interlayer or between the first interpolymer thermoplastic layer and the second interpolymer thermoplastic layer from a Functional element arranged with electrically controllable properties, a fifth thermoplastic polymer intermediate layer and a sixth thermoplastic polymeric intermediate layer. In the stacking sequence, the fifth thermoplastic polymeric interlayer is disposed between the functional element and the sixth thermoplastic polymeric interlayer. In addition, the sixth thermoplastic polymer intermediate layer has a recess region in which the fifth thermoplastic polymer intermediate layer is arranged in sections. In this embodiment, the functional element is in phantom completely disposed within the recess area of the sixth thermoplastic polymeric interlayer and substantially in a different plane than the sixth thermoplastic polymeric interlayer. This means that the functional element is arranged in the region of the orthogonal projection of the recess area with respect to the outer pane.

By partially receiving the fifth thermoplastic polymeric interlayer in the recess area of the sixth thermoplastic polymer interlayer, the local thickness difference of the composite disk introduced by the localized functional element is compensated so that glass breakage during lamination and / or permanent stresses in the glass can be avoided , The partial incorporation of the fifth thermoplastic polymer interlayer into the recess area of the sixth thermoplastic polymer interlayer means that not all of the fifth thermoplastic polymeric interlayer is received in the recess area, but only a portion of the fifth thermoplastic polymeric interlayer.

The dimensions, in particular the length and width of the recess area in the sixth thermoplastic polymer intermediate layer substantially correspond to the dimensions of the functional element. This means in particular that the dimensions of the recess area a maximum of 0.5%, preferably a maximum of 0.2% differ from those of the functional element.

The thickness of the fifth thermoplastic polymer intermediate layer preferably corresponds at least to the thickness of the functional element, more preferably the thickness of the fifth thermoplastic polymeric intermediate layer is greater than the thickness of the functional element. For example, the functional element is 0.40 mm thick and the fifth thermoplastic polymeric interlayer is 0.76 mm thick.

The thickness of the sixth thermoplastic polymer intermediate layer substantially corresponds to the thickness of the functional element. This means, in particular, that the thickness of the sixth thermoplastic polymer interlayer corresponds to the thickness of the functional element or differs by not more than 15%, preferably not more than 10%, particularly preferably not more than 5%, from the thickness of the functional element.

In one embodiment, the thickness of the sixth thermoplastic polymer intermediate layer corresponds exactly to the thickness of the functional element or is smaller by 0.01 mm to 0.05 mm, for example 0.02 mm, than the thickness of the functional element. For example, the thickness of the functional element may be 0.4 mm and the thickness of the sixth thermoplastic polymer intermediate layer 0.38 mm.

In one embodiment of the composite pane according to the invention, a seventh thermoplastic polymer intermediate layer is arranged between the first thermoplastic polymer intermediate layer and the inner pane. This seventh thermoplastic polymer interlayer has a cutout area in which a stacking sequence of a function element with electrically controllable properties and an eighth thermoplastic polymeric interlayer or a stacking sequence of an eighth thermoplastic polymer interlayer, a ninth thermoplastic polymer interlayer and a functionally arranged element with electrically controllable Properties is arranged.

The dimensions, in particular the length and width of the recess area in the seventh thermoplastic polymer intermediate layer substantially correspond to the dimensions of the functional element. Also the dimensions, in particular the length and width of the eighth thermoplastic polymer intermediate layer and the dimensions The ninth thermoplastic polymer intermediate layer correspond substantially to the dimensions of the functional element. This means, in particular, that the dimensions of the recess area in the seventh thermoplastic polymer intermediate layer and the dimensions of the eighth and the ninth thermoplastic polymer intermediate layer deviate a maximum of 0.5%, preferably at most 0.2%, from those of the functional element.

The thickness of the seventh thermoplastic polymer intermediate layer substantially corresponds to the thickness of the stacking sequence arranged in its recess area. This means, in particular, that the thickness of the seventh thermoplastic polymer intermediate layer corresponds to the thickness of the stacking sequence arranged in the recess region thereof or deviates not more than 15%, preferably not more than 10%, particularly preferably not more than 5% from the thickness of the functional element. In a preferred embodiment, the thickness of the seventh thermoplastic polymer interlayer deviates by a maximum of 0.02 mm from the thickness of the stacking sequence arranged in its recess region.

The inclusion of the stacking sequence in the recess area of the seventh thermoplastic polymeric interlayer compensates for the localized thickness difference of the composite disk introduced by the localized stacking sequence so that glass breakage during lamination and / or permanent stresses in the glass can be avoided.

In one embodiment, the composite pane according to the invention has a second thermoplastic polymer intermediate layer between the first thermoplastic polymeric intermediate layer and the inner pane, and a functional element with electrically controllable properties and a tenth thermoplastic intermediate layer is arranged between the first thermoplastic polymeric intermediate layer and the second thermoplastic polymeric intermediate layer. In this embodiment, the recess region of the first thermoplastic polymer intermediate layer is formed such that in this the infrared radiation-reflecting element and partially the tenth thermoplastic polymer interlayer is arranged, wherein the functional element between the second thermoplastic polymer interlayer and the tenth thermoplastic polymer interlayer completely in perspective within the recess area of the first thermoplastic polymeric interlayer and is disposed substantially in a different plane than the first thermoplastic polymeric interlayer. This means that the functional element is arranged in the region of the orthogonal projection of the recess area with respect to the outer pane. In this embodiment, the thickness of the first thermoplastic polymer interlayer substantially equals the sum of the thicknesses of the infrared-ray reflective element and the tenth thermoplastic polymeric interlayer.

Substantially in a different plane than the first thermoplastic polymeric interlayer means that at least 80%, preferably at least 85%, more preferably at least 90%, most preferably at least 95% of the functional element is disposed in a different plane than the first thermoplastic polymeric interlayer ,

For the purposes of the invention, electrically controllable optical properties are to be understood as meaning those properties which are infinitely variable, but equally also those which can be switched between two or more discrete states.

The electrical control of the optical properties of the functional element, for example, by means of switches, rotary or slide controls, which are integrated in the fittings of the vehicle. However, it is also possible for a control button to be integrated in the composite pane, for example a capacitive button. Alternatively or additionally, the optical properties of the functional element can be controlled by non-contact methods, for example by the detection of gestures, or depending on the state of the pupil or eyelid detected by a camera and suitable evaluation electronics. Alternatively or additionally, the optical properties of the functional element can be controlled by sensors which detect, for example, a light incident on the pane.

The controllable functional element is preferably foil-like and typically comprises an active layer between two surface electrodes. The active layer has the controllable optical properties that can be controlled via the voltage applied to the surface electrodes. The area electrodes and the active layer are typically arranged substantially parallel to the surfaces of the outer pane and the inner pane. The surface electrodes are connected to an external voltage source electrically connected in a known per se. The electrical contacting is realized by means of suitable connection cables, for example foil conductors, which are optionally connected to the surface electrodes via so-called bus bars, for example strips of an electrically conductive material or electrically conductive imprints.

The surface electrodes are preferably designed as transparent, electrically conductive layers. The surface electrodes preferably contain at least one metal, a metal alloy or a transparent conducting oxide (TCO). The surface electrodes may contain, for example, silver, gold, copper, nickel, chromium, tungsten, indium tin oxide (ITO), gallium-doped or aluminum-doped zinc oxide and / or fluorine-doped or antimony-doped tin oxide. The surface electrodes preferably have a thickness of 10 nm to 2 pm, more preferably from 20 nm to 1 pm (microns), most preferably from 30 nm to 500 nm.

In addition to the active layer and the surface electrodes, the functional element may comprise further layers known per se, for example barrier layers, blocking layers, antireflection layers, protective layers and / or smoothing layers.

The functional element is preferably present as a multilayer film with two outer carrier films. In such a multilayer film, the surface electrodes and the active layer are arranged between the two carrier films. With outer carrier film is meant here that the carrier films form the two surfaces of the multilayer film. The functional element can thereby be provided as a laminated film, which can be advantageously processed. The functional element is advantageously protected by the carrier foils from damage, in particular corrosion. The multilayer film contains in the order given at least one carrier film, a surface electrode, an active layer, another surface electrode and another carrier film. In particular, the carrier foil carries the surface electrodes and gives the necessary mechanical stability to a liquid or soft active layer.

The carrier films preferably contain at least one thermoplastic polymer, particularly preferably low-plasticizer or plasticizer-free polyethylene terephthalate (PET). This is particularly advantageous with regard to the stability of the multilayer film. However, the carrier films may also contain or consist of other plasticizer-poor or plasticizer-free polymers, for example ethylene vinyl acetate (EVA), Polypropylene, polycarbonate, polymethyl methacrylate, polyacrylate, polyvinyl chloride, polyacetate resin, casting resins, acrylates, fluorinated ethylene-propylenes, polyvinyl fluoride and / or ethylene-tetrafluoroethylene. The thickness of each carrier film is preferably from 0.1 mm to 1 mm, particularly preferably from 0.1 mm to 0.2 mm.

Typically, the carrier films each have an electrically conductive coating, which faces the active layer and acts as a surface electrode.

In an advantageous embodiment of a composite pane according to the invention, the functional element with electrically controllable properties is a polymer dispersed liquid crystal (PDLC) element or a suspended particle device (SPD element).

In a preferred embodiment of a composite pane according to the invention, the functional element is a PDLC functional element (polymer-dispersed liquid crystal). The active layer of a PDLC functional element contains liquid crystals embedded in a polymer matrix. If no voltage is applied to the surface electrodes, the liquid crystals are aligned disorderly, resulting in a strong scattering of passing through the active layer light. If a voltage is applied to the surface electrodes, the liquid crystals align in a common direction and the transmission of light through the active layer is increased.

In principle, however, it is also possible to use other types of controllable functional elements, for example LC (liquid crystal), electrochromic or electroluminescent functional elements or guest-host systems.

SPD functional elements, LC elements, electrochromic or electroluminescent functional elements and their mode of operation are known per se to those skilled in the art, so that a detailed description can be dispensed with at this point.

Functional elements as multilayer films are commercially available. The functional element to be integrated is typically cut out of a multilayer film of larger dimensions in the desired shape and size. This can be done mechanically, for example with a knife. In one embodiment, the cutting is done by means of a plotter, which is equipped with a cutting blade. In a further embodiment, the cutting is done by means of a laser. It has been shown that the side edge in this Case is more stable than mechanical cutting. With mechanically cut side edges there may be a risk that the material retreats as it were, which is visually striking and adversely affects the aesthetics of the disc.

The outer pane and the inner pane are preferably made of glass, more preferably of soda-lime glass, as is customary for window panes. However, the panes can also be made of other types of glass, for example quartz glass, borosilicate glass or aluminosilicate glass, or of rigid clear plastics, for example polycarbonate or polymethyl methacrylate. The panes can be clear or tinted or colored.

The outer pane, the inner pane and / or the first, the second, the third, the fourth, the fifth, the sixth, the seventh, the eighth, the ninth and / or the tenth thermoplastic polymer intermediate layer may have coatings, for example antireflective coatings, non-stick coatings , Anti-scratch coatings, photocatalytic coatings, electrically heatable coatings, sunscreen coatings and / or the emission of long-wave heat radiation-reducing coatings (low-E coatings). Preferably, the anti-reflection coatings, anti-scratch coatings and / or low-E coatings are attached to the outside of the outer pane or to the outside of the inner pane. The outer side of the outer pane and the outer side of the inner pane each mean that side of the pane which does not point in the direction of the infrared radiation-reflecting element.

The thickness of the outer pane and the inner pane can vary widely and thus adapted to the requirements in individual cases. The outer pane and the inner pane preferably have thicknesses of 0.5 mm to 5 mm, particularly preferably of 1 mm to 3 mm.

In a preferred embodiment of a composite pane according to the invention, a peripheral covering pressure is applied to the inner side of the outer pane and / or the outer side of the inner pane, which preferably conceals at least two of the side edges of the infrared radiation-reflecting element as viewed through the composite pane. The peripheral covering pressure is preferably made of an opaque enamel. The first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth thermoplastic polymeric interlayers may each be formed, for example, by a single thermoplastic polymeric film. A thermoplastic polymeric interlayer may also be formed as a two-ply, three-ply or multilayer film stack, the individual films having the same or different properties.

The thermoplastic polymeric interlayers independently preferably contain at least polyvinyl butyral (PVB), ethylene vinyl acetate (EVA) and / or polyurethane (PU), more preferably polyvinyl butyral (PVB). The thermoplastic polymeric interlayers may also be tinted or colored independently of each other.

In one embodiment of a composite pane according to the invention, the thermoplastic polymeric intermediate layers contain, independently of one another, at least 60% by weight, preferably at least 70% by weight, particularly preferably at least 90% by weight and in particular at least 97% by weight polyvinyl butyral.

In one embodiment, the thermoplastic polymeric interlayers are formed of the same material.

In preferred embodiments, the composition of a frame-shaped thermoplastic polymer interlayer differs from the composition of the thermoplastic polymer interlayer, which is arranged in sections in the recess area of the frame-shaped thermoplastic polymer interlayer. For example, in these embodiments, the composition of the fifth thermoplastic polymeric interlayer differs from the composition of the sixth thermoplastic polymeric interlayer and / or the composition of the tenth thermoplastic polymeric interlayer is different from the composition of the first interpolymer thermoplastic layer.

For example, the thermoplastic polymeric intermediate layers may differ in color, so individual intermediate layers may be tinted and the remaining intermediate layers colorless. It is also possible, for example, for the intermediate layers to differ with regard to their additives or the proportion of plasticizers. In a preferred embodiment, the composition of the first thermoplastic polymeric layer of the infrared radiation reflective element in the form of an XIR bilayer differs from the composition of the first thermoplastic polymeric intermediate layer which frames the XIR bilayer.

In a further preferred embodiment, the composition of the first thermoplastic polymer layer and / or the composition of the second thermoplastic polymer layer of the infrared radiation-reflecting element in the form of an XIR trilayer differs from the composition of the first thermoplastic polymer interlayer which frames the XIR trilayer ,

For example, the first thermoplastic polymeric interlayer and the first thermoplastic polymeric layer of the XIR bilayer or the first thermoplastic polymeric layer and / or the second thermoplastic polymeric layer of the XIR trilayer may differ in color or additives or in the proportion of plasticizers ,

It will be understood that with the first thermoplastic polymeric interlayer, second thermoplastic polymeric interlayer, third thermoplastic polymeric interlayer, fourth thermoplastic polymeric interlayer, fifth thermoplastic polymeric interlayer, sixth thermoplastic polymeric interlayer, seventh thermoplastic polymeric interlayer, eighth thermoplastic polymeric interlayer, ninth thermoplastic polymeric interlayer and tenth thermoplastic polymeric interlayer, only the respective thermoplastic polymeric interlayer is named. It is not absolutely necessary for all intermediate layers to be present in the composite pane according to the invention. By way of example, a composite pane according to the invention can also have only a first, a fifth and a sixth thermoplastic polymer interlayer, without a second, a third and / or a fourth thermoplastic polymeric interlayer being present.

Over the thermoplastic polymeric intermediate layers, the outer pane and the inner pane are permanently connected to one another stably by lamination. The thermoplastic polymeric interlayers typically have the same outer dimensions as the outer and inner disks.

The side edges of all thermoplastic polymeric interlayers are preferably aligned.

In one embodiment, at least one of the side edges of the functional element is enclosed by a sealing material, i. the functional element has at least partially an edge seal. The sealing material circumferentially covers at least one, two, three or four side edges of the functional element and in particular prevents the diffusion of chemical constituents of the thermoplastic polymeric intermediate layers, for example plasticizers, into the active layer. As a result, a chemical reaction of the constituents of the thermoplastic polymeric intermediate layers with the active layer of the functional element and / or clouding of the edge region of the functional element is reduced or prevented.

The sealing material may cover the functional element in sections or completely preferably circumferentially.

The sealing material is preferably dimensioned such that it covers in each case a narrow edge region of preferably 1 mm to 50 mm, particularly preferably 2 mm to 20 mm, for example 10 mm, the top and the bottom of the functional element and at least two of the side edges.

The sealing material is preferably plasticizer-poor or plasticizer-free. Particularly preferably, the sealing material contains or consists of polyethylene terephthalate (PET) or polyethylene (PE) or polyvinyl fluoride (PVF).

In one embodiment, the sealing material contains or consists of polyethylene terephthalate (PET) or polyethylene (PE).

The upper side and lower side of a film-like functional element mean the two large surfaces which are arranged parallel to the first disk and the second disk. For the purposes of the invention, the upper side is the surface which points in the direction of the outer pane and the underside is the surface which points in the direction of the inner pane. Side edges describe the orthogonal surfaces of the functional element, which are designed to be very thin in film-like functional elements.

In one embodiment, the sealant is an adhesive or an adhesive tape, in particular a transparent colorless adhesive or a transparent colorless adhesive tape. For example, acrylic or silicone based adhesive tapes may be used as the sealing material. A transparent colorless edge seal has the advantage that the edge of the functional element when viewed through the composite disc is not noticeable or hardly disturbing.

In another embodiment, the seal is a plastic extruded around the side edges of the functional element.

The sealing material may also be formed as one or more barrier films that cover the functional element in sections or completely. In this case, two, three, four or more barrier films may be welded together and form a pocket in which the functional element is arranged completely or in sections.

In an advantageous embodiment of the composite pane according to the invention all four side edges are sealed by a sealing material.

The composite pane according to the invention can be, for example, the roof pane, the side pane or the windshield of a vehicle or another vehicle glazing, for example a separating disk in a vehicle, preferably in a rail vehicle or a bus. Alternatively, the composite pane may be architectural glazing, for example in an exterior facade of a building or a partition inside a building. The composite pane according to the invention is particularly preferably a roof pane of a vehicle.

If the composite pane is intended to separate an interior from the outside environment in a window opening of a vehicle or a building, the interior pane (vehicle interior) facing the pane is referred to as interior pane in the sense of the invention. With outer pane, the outer environment facing disc is called. The invention is not limited thereto. The invention also includes a method for producing a composite pane according to the invention, wherein at least

a) an outer pane, a first thermoplastic polymeric interlayer having a recess area, and an inner pane are stacked in this spatial sequence, wherein in the recess area an infrared radiation reflective element in the form of an XIR bilayer comprising a first thermoplastic polymeric layer and a in the direction of the inner pane or the outer pane arranged carrier film with infrared radiation reflective coating, or in the form of an XIR trilayer, comprising a first thermoplastic polymer layer, a second thermoplastic polymer layer and a disposed between the first thermoplastic polymer layer and the second thermoplastic polymer layer Carrier film with infrared radiation reflective coating, is arranged

b) the outer pane (1) and the inner pane (2) are connected by lamination.

The lamination preferably takes place under the action of heat, vacuum and / or pressure. Lamination methods known per se can be used, for example autoclave methods, vacuum bag methods, vacuum ring methods, calendering methods, vacuum laminators or combinations thereof.

Advantage of the method according to the invention over the methods known from the prior art, in which the carrier film is cut back with infrared radiation reflective coating at least in an edge region of the composite disc is that in the inventive method no pruning of the carrier film with infrared radiation reflective coating is necessary. The infrared radiation-reflecting element can be cut out in the appropriate size of, for example, a roll. Thus, there is no waste of carrier film with infrared radiation reflective coating. In particular, this represents a cost advantage since a thermoplastic polymeric interlayer is less expensive than an XIR bilayer or XIR trilayer.

In one embodiment of the method according to the invention, an outer pane is introduced and a first thermoplastic polymeric interlayer, which has a cut-out area, is arranged flat on this area. Then, an infrared radiation-reflecting element is preferably arranged flush in the recess area. The Infrared radiation reflecting element may be in the form of an XIR bilayer comprising a first thermoplastic polymeric layer and a backing sheet with infrared radiation reflective coating disposed thereon in the direction of the inner pane or outer pane or in the form of an XIR trilayer comprising a first thermoplastic polymeric layer second thermoplastic polymer layer and a disposed between the first thermoplastic polymer layer and the second thermoplastic polymer layer carrier film with infrared radiation reflective coating present. Subsequently, inner disk is arranged flat on the first thermoplastic polymeric intermediate layer. In the next step, the outer pane and the inner pane are then connected by lamination.

In a further embodiment of the method according to the invention, an inner pane is placed and on this area a first thermoplastic polymeric intermediate layer, which has a cutout area, is arranged. Then, an infrared radiation-reflecting element is preferably arranged flush in the recess area. The infrared radiation-reflecting element may be in the form of an XIR bilayer, comprising a first thermoplastic polymer layer and a carrier film with infrared radiation-reflecting coating arranged thereon in the direction of the inner pane or the outer pane, or in the form of an XIR trilayer, comprising a first thermoplastic polymer layer, a second thermoplastic polymeric layer and a carrier film with infrared radiation reflective coating disposed between the first thermoplastic polymeric layer and the second thermoplastic polymeric layer. Subsequently, the outer pane is arranged flat on the first thermoplastic polymeric intermediate layer. In the next step, the outer pane and the inner pane are then connected by lamination.

In one embodiment of the method according to the invention, a second thermoplastic polymeric intermediate layer is arranged in a planar manner between the inner pane and the first thermoplastic polymeric intermediate layer.

Preferably, a third thermoplastic polymeric interlayer is disposed between the second thermoplastic polymeric interlayer and the first thermoplastic polymeric interlayer. The third thermoplastic polymer intermediate layer has a recess region in which a functional element with electrically controllable properties is arranged. Optionally will be between the first thermoplastic intermediate polymeric layer and the third thermoplastic polymeric interlayer disposed a fourth thermoplastic polymeric interlayer.

In a further embodiment of the method according to the invention, a stacking sequence of a functional element with electrically controllable properties, a fifth thermoplastic polymeric intermediate layer and a sixth thermoplastic polymeric intermediate layer is arranged between the first thermoplastic polymeric intermediate layer and the inner pane. In the stacking sequence, the fifth thermoplastic interlayer is disposed between the functional element and the sixth thermoplastic interlayer, the sixth thermoplastic interlayer has a recessed area, and the functional element is completely scanned within the recess area of the sixth thermoplastic polymeric interlayer and substantially in a plane other than that sixth thermoplastic polymeric interlayer, ie arranged in the region of the orthogonal projection of the recess area with respect to the outer pane. As a result of the lamination, in this embodiment of the method according to the invention, the fifth thermoplastic intermediate layer is arranged in sections in the recess area of the sixth thermoplastic polymeric intermediate layer.

In one embodiment of the method according to the invention, a second thermoplastic polymer intermediate layer is arranged between the first thermoplastic polymer intermediate layer and the inner pane, and either a stacking sequence is formed between the inner pane and the second thermoplastic polymeric intermediate layer or between the first thermoplastic polymeric intermediate layer and the second thermoplastic polymeric intermediate layer a functional element having electrically controllable properties, a fifth thermoplastic polymeric intermediate layer and a sixth thermoplastic polymeric intermediate layer. In the stacking sequence, the fifth thermoplastic polymeric interlayer is disposed between the functional element and the sixth thermoplastic polymeric interlayer. In addition, the sixth thermoplastic polymeric intermediate layer has a cutout area. The functional element is arranged in full view inside the recess area of the sixth thermoplastic polymer intermediate layer and substantially in a different plane than the sixth thermoplastic polymer intermediate layer, ie in the area of the orthogonal projection of the recess area with respect to the outer pane. By the lamination In this embodiment of the method according to the invention, the fifth thermoplastic polymer interlayer is arranged in sections in the recess region of the sixth thermoplastic polymer interlayer. The partial incorporation of the fifth thermoplastic polymeric interlayer into the recess area of the sixth thermoplastic polymeric interlayer means that not all of the fifth thermoplastic polymeric interlayer is received in the recess area but only a portion of the fifth thermoplastic polymeric interlayer.

In a further embodiment of the method according to the invention, a seventh thermoplastic polymer intermediate layer is arranged between the first thermoplastic polymer intermediate layer and the inner pane. This seventh thermoplastic polymer interlayer has a cutout area in which a stacking sequence of a function element with electrically controllable properties and an eighth thermoplastic polymeric interlayer or a stacking sequence of an eighth thermoplastic polymer interlayer, a ninth thermoplastic polymer interlayer and a functionally arranged element with electrically controllable Properties is arranged.

In one embodiment of the method according to the invention, a second thermoplastic polymer intermediate layer is arranged between the first thermoplastic polymer intermediate layer and the inner pane and a functional element with electrically controllable properties and a tenth thermoplastic intermediate layer is arranged between the first thermoplastic polymeric intermediate layer and the second thermoplastic polymeric intermediate layer. In this embodiment, the infrared radiation-reflecting element is arranged in the recess area of the first thermoplastic polymer interlayer, the functional element between the second thermoplastic polymer interlayer and the tenth thermoplastic polymer interlayer being viewed completely within the recess area of the first thermoplastic polymer interlayer and substantially in another Level is arranged as the first thermoplastic polymeric interlayer. This means that the functional element is arranged in the region of the orthogonal projection of the recess area with respect to the outer pane. In this embodiment of the method, a first thermoplastic polymeric interlayer is used, the thickness of which substantially corresponds to the Sum of the thicknesses of the infrared radiation reflecting element and the tenth thermoplastic polymer intermediate layer corresponds. As a result of the lamination, in this embodiment of the method according to the invention, the tenth thermoplastic polymer interlayer is arranged in sections in the recess region of the first thermoplastic polymer interlayer.

In a preferred embodiment, the inventive method comprises applying a peripheral covering pressure on the inside of the outer pane and / or the outside of the inner pane, wherein the covering pressure preferably conceals at least two of the side edges of the infrared radiation reflecting element in view through the composite pane. The peripheral covering pressure is preferably made of an opaque enamel.

In an advantageous embodiment, the method according to the invention comprises the application of sealing material on the functional element or around the functional element or onto the thermoplastic polymeric intermediate layers surrounding the functional element.

The method according to the invention can, as an additional step, coat the outer pane, the inner pane and / or the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth and / or tenth thermoplastic polymers Intermediate layer, for example, with anti-reflective coatings, non-stick coatings, anti-scratch coatings, photocatalytic coatings, electrically heatable coatings, sunscreen coatings and / or the emission of long-wave heat radiation-reducing coatings (low-E coatings) include. The antireflection coatings, anti-scratch coatings and / or low-E coatings are preferably applied to the outside of the outer pane or to the outside of the inner pane.

With regard to the dimensions, thicknesses, materials and preferred embodiments of the outer pane, the thermoplastic polymeric interlayers, the thermoplastic polymer layers, the inner pane, the functional element, the XIR bilayer and the XIR trilayer, the statements made in the description of the composite pane according to the invention also apply to the inventive method. The invention also encompasses the use of a composite pane according to the invention in buildings or in means of transportation for the traffic on land, in the air or on water. The composite pane is thereby preferably used as a window pane, for example as a window pane of vehicles, of buildings or of rooms in the interior of buildings. The composite pane is particularly preferably used as a roof panel, side window, windshield or rear window, very particularly preferably as a roof panel of a motor vehicle.

The invention will be explained in more detail with reference to drawings. The drawings are schematic representations and not to scale. The drawings in no way limit the invention. Show it:

2 shows a cross-section through an embodiment of the composite pane of FIG. 1 along the section line X-X ', FIG.

3 shows a cross section through a further embodiment of the composite disk

1 along the section line X-X ',

4 shows a cross section through a further embodiment of the composite pane

1 along the section line X-X ',

5 shows a cross section through a further embodiment of the composite disk

1 along the section line X-X ',

6 enlargement of the detail Z from FIG. 5, FIG.

7 shows a cross section through a further embodiment of the composite pane

1 along the section line X-X ',

Fig. 8 shows a cross section through a further embodiment of the composite disk

1 along the section line X-X ',

9 shows a cross section through a further embodiment of the composite pane

1 along the section line X-X ',

10 shows a cross section through a further embodiment of the composite pane

1 along the section line X-X ',

Fig. 1 1 shows a cross section through a further embodiment of the composite disk

1 along the section line X-X ',

12 shows a cross section through a further embodiment of the composite pane

FIG. 1 along the section line XX ', 13 shows a cross section through a further embodiment of the composite pane of FIG. 1 along the section line XX ',

14 shows a cross section through a further embodiment of the composite disk

1 along the section line X-X ',

Fig. 15 shows an embodiment of the method according to the invention with reference to a

flow chart

16 is a schematic illustration of the region of the orthogonal projection of FIG

Recess area in the sixth thermoplastic polymer layer with respect to the outer pane.

Figure 1 shows the top view of an embodiment of a composite pane 100 according to the invention, wherein the plan view is shown on the outer pane. The composite pane 100 comprises an outer pane 1 and an inner pane 2, which are connected to one another via a first thermoplastic polymeric intermediate layer 3 a. The outer pane 1 has a thickness of 2.1 mm and consists for example of a clear soda-lime glass. The inner pane 2 has a thickness of 1, 6 mm and, for example, also consists of a clear soda-lime glass. The composite pane 100 may be, for example, a roof panel of a vehicle.

The first thermoplastic polymeric intermediate layer 3a has a recess region 5 in which an infrared radiation-reflecting element 4 is arranged flush. The composite pane 100 shown in FIG. 1 has a peripheral covering pressure 7 made of an opaque enamel, wherein the side edges (4.1, 4.2, 4.3, 4.4) of the infrared radiation reflecting element 4 are covered by the covering pressure 7.

FIG. 2 shows a cross-section through an embodiment of the composite pane 100 from FIG. 1. In the embodiment shown in FIG. 2, the first thermoplastic polymeric interlayer 3a is made, for example, of PVB with, for example, 78% by weight polyvinyl butyral (PVB) and 20% by weight. % Triethylene glycol bis (2-ethylhexanoate) as a plasticizer and has a thickness of 0.38 mm. In the embodiment shown, the infrared radiation reflecting element 4 is an XIR bilayer comprising a first thermoplastic polymer layer 4a containing PVB and a carrier film with infrared radiation reflecting coating 4b. The first thermoplastic polymer layer contains, for example, 95% by weight of polyvinyl butyral (PVB) and 5% by weight of triethylene glycol bis (2-ethylhexanoate) as plasticizer. The first thermoplastic polymeric layer 4a is 0.38 mm thick. The carrier film contains PET and has a thickness of 50 μm with the infrared-reflective coating. The infrared radiation reflective coating preferably contains silver. In the embodiment shown in FIG. 2, the XIR bilayer is arranged between the outer pane 1 and the inner pane 2 in such a way that the carrier foil with infrared-reflecting coating 4b adjoins the

Inner pane 2 adjacent. However, it is also possible to arrange the XIR bilayer such that the carrier film with infrared-reflective coating 4b adjoins the outer pane 1. In the embodiment shown in Figure 2, the inside of the outer pane 1 and the outer side of the inner pane 2 is provided with a peripheral covering pressure 7 made of enamel.

FIG. 3 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line X-X '. The composite disk 100 from FIG. 3 substantially corresponds to the composite disk 100 from FIG. 2, so that only the differences will be discussed below. In the embodiment shown in Figure 3 is the

Infrared radiation reflecting element 4, an XIR trilayer comprising a first thermoplastic polymer layer 4a and a second thermoplastic layer 4c containing PVB and a carrier film with infrared radiation reflective coating 4b, which is arranged between the first layer 4a and the second layer 4c. The first and second thermoplastic polymer layers 4a and 4c are each 0.38 mm thick and contain, for example, 95% by weight of polyvinyl butyral (PVB) and 5% by weight of triethylene glycol bis (2-ethylhexanoate) as a plasticizer. The carrier film contains PET and has a thickness of 50 μm with the infrared-reflective coating. The infrared radiation reflective coating preferably contains silver. The first thermoplastic polymer interlayer 3a is formed, for example, as a PVB layer containing 78% by weight of polyvinyl butyral (PVB) and 20% by weight of triethylene glycol bis (2-ethylhexanoate) as a plasticizer and has a thickness of 0.76 mm ,

FIG. 4 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line X-X '. The composite pane 100 from FIG. 4 essentially corresponds to the composite pane 100 from FIG. 2, so that only the differences are discussed below.

In the embodiment shown in FIG. 4, a second thermoplastic layer is present between the first thermoplastic polymer intermediate layer 3a and the inner pane 2 polymeric intermediate layer 3b arranged. This contains PVB and is 0.38 mm thick. In the embodiment shown in FIG. 4, the XIR bilayer is arranged between the outer pane 1 and the second thermoplastic polymer intermediate layer 3b such that the carrier foil with infrared-reflecting coating 4b adjoins the second thermoplastic polymeric intermediate layer 3b. However, it is also possible to arrange the XIR bilayer such that the carrier film with infrared-reflective coating 4b adjoins the outer pane 1.

FIG. 5 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line X-X '. The composite pane 100 from FIG. 5 essentially corresponds to the composite pane 100 from FIG. 3, so that only the differences are discussed below.

In the embodiment shown in FIG. 5, a second thermoplastic polymeric intermediate layer 3b is arranged between the first thermoplastic polymer intermediate layer 3a and the inner pane 2. This contains PVB and is 0.38 mm thick. Between the second thermoplastic polymer intermediate layer 3b and the first thermoplastic polymer interlayer 3a, a third thermoplastic polymer interlayer 3c is arranged, which has a recess area 8 in which a functional element 6, which is controllable by an electrical voltage in its optical properties, is arranged flush , The electrical leads are not shown for simplicity. The third thermoplastic polymeric interlayer contains PVB and is 0.38 mm thick.

The controllable functional element 6 is for example a PDLC multilayer film with a thickness of 0.4 mm, consisting of an active layer 11 between two surface electrodes 12, 13 and two carrier foils 14, 15. The active layer 11 contains a polymer matrix with liquid crystals dispersed therein, which align in dependence on the applied voltage to the surface electrodes, whereby the optical properties can be controlled. The carrier films 14, 15 are made of PET and have a thickness of, for example, 0.125 mm. The carrier foils 14, 15 are provided with a coating of ITO having a thickness of approximately 100 nm facing the active layer 11, which form the surface electrodes 12, 13. The surface electrodes 12, 13 are not shown bus bars (for example, formed by a silver-containing screen printing) and not shown connection cable with the on-board electrical system connectable. In the embodiment shown in FIG. 5, the dimensions (length and width) of the functional element 6 correspond to the dimensions of the infrared radiation reflecting element 4. However, it is also possible that in a composite pane 100 according to the invention the dimensions of the functional element 6 are those of the infrared radiation reflecting element 4 differ, preferably the functional element 6 is larger in area from the surface than the infrared radiation reflecting element. 4

FIG. 6 shows an enlarged representation of the region Z from FIG. 5.

FIG. 7 shows a cross section through a further embodiment of the composite pane of FIG. 1 along the section line X-X '. The composite pane 100 from FIG. 7 essentially corresponds to the composite pane 100 from FIG. 5, so that only the differences are discussed below.

In the embodiment shown in FIG. 7, the infrared radiation-reflecting element 4 is an XIR bilayer comprising a first thermoplastic polymer layer 4a containing PVB and a carrier film with an infrared radiation-reflecting coating 4b. The first thermoplastic polymer layer 4a is 0.38 mm thick. The carrier film contains PET and has a thickness of 50 μm with the infrared-reflective coating. The infrared radiation reflective coating preferably contains silver. The thickness of the first thermoplastic polymer intermediate layer 3a is 0.38 mm in the embodiment shown in FIG. In addition, between the first thermoplastic polymer intermediate layer 3a and the third thermoplastic polymeric intermediate layer 3c, a fourth thermoplastic polymeric intermediate layer 3d is disposed. This contains PVB and is 0.38 mm thick. In the embodiment shown in FIG. 7, the XIR bilayer is arranged between the outer pane 1 and the fourth thermoplastic polymer intermediate layer 3d in such a way that the carrier foil with infrared-reflecting coating 4b adjoins fourth thermoplastic polymeric intermediate layer 3d. However, it is also possible to arrange the XIR bilayer such that the carrier film with infrared-reflective coating 4b adjoins the outer pane 1. In the embodiment illustrated in FIG. 7, the dimensions (length and width) of the functional element 6 correspond to the dimensions of the infrared radiation reflecting element 4. However, it is also possible that in a composite pane 100 according to the invention the dimensions of the functional element 6 reflect those of the infrared radiation Elements 4 deviate, preferably the functional element 6 is larger in area from the surface than the infrared radiation reflecting element 4.

FIG. 8 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line X-X '. The composite pane 100 from FIG. 8 essentially corresponds to the composite pane 100 from FIG. 3, so that only the differences will be discussed below.

In the embodiment shown in FIG. 8, a stacking sequence of a functional element 6 with electrically controllable properties, a fifth thermoplastic polymeric intermediate layer 3e and a sixth thermoplastic polymeric intermediate layer 3f is arranged between the first thermoplastic polymeric intermediate layer 3a and the inner pane 2. In the stacking sequence, the fifth thermoplastic intermediate layer 3e is arranged between the functional element 6 and the sixth thermoplastic polymeric intermediate layer 3f, the sixth thermoplastic polymeric intermediate layer 3f has a recess region 9 in which the fifth thermoplastic polymer intermediate layer 3e is arranged in sections. The functional element 6 is arranged completely inside the recess area 9 of the sixth thermoplastic polymer intermediate layer 3f and substantially in a different plane than the sixth thermoplastic polymeric intermediate layer 3f, ie in the region of the orthogonal projection of the recess area 9 with respect to the outer pane 1. In FIG. 8, this region of the orthogonal projection is labeled A. The fifth thermoplastic polymeric interlayer 3e contains PVB and is 0.38 mm thick. However, the fifth thermoplastic polymer intermediate layer 3e may also be 0.76 mm thick. The sixth thermoplastic polymer interlayer 3f contains PVB and is, for example, 0.38 mm thick. In the embodiment shown in FIG. 8, the layer stack is arranged in such a way that the functional element 6 is arranged directly adjacent to the infrared radiation-reflecting element 6. But it is also possible a reverse arrangement of the stacking sequence, so that the sixth thermoplastic polymer layer 3f immediately adjacent to the first thermoplastic polymer layer 3a. In the embodiment shown in FIG. 8, the dimensions (length and width) of the functional element 6 correspond to the dimensions of the infrared radiation-reflecting element 4. However, it is also possible that in a composite pane 100 according to the invention the dimensions of the functional element 6 are different from those of FIG Deviate infrared radiation reflecting element 4, preferably the functional element 6 is larger in area from the surface than the infrared radiation reflecting element. 4

FIG. 9 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line X-X '. The composite pane 100 from FIG. 9 essentially corresponds to the composite pane 100 from FIG. 4, so that in the following only the differences will be discussed.

In the embodiment shown in FIG. 9, a stacking sequence of a functional element 6 with electrically controllable properties, a fifth thermoplastic polymeric intermediate layer 3e and a sixth thermoplastic polymeric intermediate layer 3f is arranged between the first thermoplastic polymeric intermediate layer 3a and the second thermoplastic polymeric intermediate layer 3b. In the stacking sequence, the fifth thermoplastic intermediate layer 3e is between the

Functional element 6 and the sixth thermoplastic polymer interlayer 3f arranged, the sixth thermoplastic polymer interlayer 3f has a

Recess area 9, in which the fifth thermoplastic polymer interlayer 3e is arranged in sections. The functional element 6 is completely transparent within the recess area 9 of the sixth thermoplastic polymeric intermediate layer 3f and substantially in a different plane than the sixth thermoplastic polymeric intermediate layer 3f, i. arranged in the region of the orthogonal projection of the recess area 9 with respect to the outer pane 1. The fifth thermoplastic polymeric interlayer 3e contains PVB and is 0.38 mm thick. However, the fifth thermoplastic polymer intermediate layer 3e may also be 0.76 mm thick. The sixth thermoplastic polymer interlayer 3f contains PVB and is, for example, 0.38 mm thick. In the embodiment shown in Figure 9 correspond to the

Dimensions (length and width) of the functional element 6 the dimensions of the infrared radiation reflecting element 4. It is also possible that in a composite pane 100 according to the invention the dimensions of the functional element 6 differ from those of the infrared radiation reflecting element 4. In the embodiment shown in FIG. 9, the layer stack is arranged in such a way that the sixth thermoplastic polymer layer 3f is arranged directly adjacent to the first thermoplastic polymer layer 3a. But it is also possible a reverse arrangement of the stacking sequence, so that the sixth thermoplastic polymer layer 3f immediately adjacent to the second thermoplastic polymer layer 3b. FIG. 10 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line XX '. The composite pane 100 from FIG. 10 substantially corresponds to the composite pane 100 from FIG. 4, so that only the differences are discussed below.

In the embodiment shown in FIG. 10, a stacking sequence of a functional element 6 with electrically controllable properties, a fifth thermoplastic polymeric intermediate layer 3e and a sixth thermoplastic polymeric intermediate layer 3f is arranged between the second thermoplastic polymeric intermediate layer 3b and the inner pane 2. In the stacking sequence, the fifth thermoplastic intermediate layer 3e is arranged between the functional element 6 and the sixth thermoplastic polymeric intermediate layer 3f, the sixth thermoplastic polymeric intermediate layer 3f has a recess region 9 in which the fifth thermoplastic polymer intermediate layer 3e is arranged in sections. The functional element 6 is arranged in full view inside the recess area 9 and substantially in a different plane than the sixth thermoplastic polymer intermediate layer 3f. This means that the functional element 6 is arranged in the region of the orthogonal projection of the recess area 9 with respect to the outer pane 1. The fifth thermoplastic polymeric interlayer 3e contains PVB and is 0.38 mm thick. However, the fifth thermoplastic polymer intermediate layer 3e may also be 0.76 mm thick. The sixth thermoplastic polymer interlayer 3f contains PVB and is, for example, 0.38 mm thick. In the embodiment illustrated in FIG. 10, the dimensions (length and width) of the functional element 6 correspond to the dimensions of the infrared radiation reflecting element 4. However, it is also possible that in a composite pane 100 according to the invention the dimensions of the functional element 6 are of those of the infrared radiation reflecting element 4 differ. In the embodiment shown in FIG. 10, the layer stack is arranged in such a way that the sixth thermoplastic polymer layer 3f is arranged directly adjacent to the inner pane 2. But it is also possible a reverse arrangement of the stacking sequence, so that the sixth thermoplastic polymer layer 3f immediately adjacent to the second thermoplastic polymeric intermediate layer 3b.

FIG. 11 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line XX '. The composite disk 100 off FIG. 11 essentially corresponds to the composite pane 100 from FIG. 3, so that only the differences are discussed below.

In the embodiment shown in FIG. 11, a seventh thermoplastic polymeric interlayer 3g is arranged between the first thermoplastic polymer interlayer 3a and the inner pane 2, which has a recess region 10 in which a stacking sequence consists of a functional element 6 with electrically controllable properties and an eighth thermoplastic polymer Intermediate layer 3h is arranged. The eighth thermoplastic polymeric interlayer 3h contains PVB and is 0.38 mm thick. The seventh thermoplastic polymeric interlayer 3g contains PVB and is 0.76 mm thick. The controllable functional element 6 is for example a PDLC multilayer film with a thickness of 0.4 mm, consisting of an active layer 11 between two surface electrodes 12, 13 and two carrier foils 14, 15. The active layer 11 contains a polymer matrix with liquid crystals dispersed therein, which align in dependence on the applied voltage to the surface electrodes, whereby the optical properties can be controlled. The carrier films 14, 15 are made of PET and have a thickness of, for example, 0.125 mm. The carrier foils 14, 15 are provided with a coating of ITO having a thickness of approximately 100 nm facing the active layer 11, which form the surface electrodes 12, 13. The surface electrodes 12, 13 are connectable via not shown bus bars (for example, formed by a silver-containing screen printing) and not shown connection cable with the on-board electrical system. In the embodiment illustrated in FIG. 11, the dimensions (length and width) of the functional element 6 correspond to the dimensions of the infrared radiation reflecting element 4. However, it is also possible that in a composite pane 100 according to the invention the dimensions of the functional element 6 are of those of the infrared radiation reflecting element 4 differ, preferably the functional element 6 is larger in area from the surface than the infrared radiation reflecting element. 4

FIG. 12 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line X-X '. The composite pane 100 from FIG. 11 essentially corresponds to the composite pane 100 from FIG. 2, so that only the differences will be discussed below.

In the embodiment shown in FIG. 12, between the first thermoplastic polymeric intermediate layer 3a and the inner pane 2 is a seventh thermoplastic polymeric intermediate layer 3g is arranged, which has a recess portion 10 in which a stacking sequence of an eighth thermoplastic polymeric intermediate layer 3h, a ninth thermoplastic polymeric interlayer 3i and a functional element disposed therebetween 6 is arranged with electrically controllable properties. The eighth thermoplastic polymeric interlayer 3h contains PVB and is 0.38 mm thick. The ninth thermoplastic polymeric interlayer 3i contains PVB and is 0.38 mm thick. The seventh thermoplastic polymeric interlayer 3g contains PVB and is 1, 14 mm thick. The controllable functional element 6 is for example a PDLC multilayer film with a thickness of 0.4 mm, consisting of an active layer 11 between two surface electrodes 12, 13 and two carrier foils 14, 15. The active layer 11 contains a polymer matrix with liquid crystals dispersed therein, which align in dependence on the applied voltage to the surface electrodes, whereby the optical properties can be controlled. The carrier films 14, 15 are made of PET and have a thickness of, for example, 0.125 mm. The carrier foils 14, 15 are provided with a coating of ITO having a thickness of approximately 100 nm facing the active layer 11, which form the surface electrodes 12, 13. The surface electrodes 12, 13 are connectable via not shown bus bars (for example, formed by a silver-containing screen printing) and not shown connection cable with the on-board electrical system. In the embodiment shown in FIG. 12, the dimensions (length and width) of the functional element 6 correspond to the dimensions of the infrared radiation reflecting element 4. However, it is also possible that in a composite pane 100 according to the invention the dimensions of the functional element 6 are those of the infrared radiation reflecting element 4 differ, preferably the functional element 6 is larger in area from the surface than the infrared radiation reflecting element. 4

FIG. 13 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line X-X '. The embodiment shown in FIG. 13 essentially corresponds to the embodiment shown in FIG. 4, so that only the differences will be discussed below.

In the embodiment shown in FIG. 13, a functional element 6 with electrically controllable properties and a tenth thermoplastic intermediate layer 3j are arranged between the first thermoplastic polymeric intermediate layer 3a and the second thermoplastic polymeric intermediate layer 3b. In addition, the recess portion 5 of the first thermoplastic polymer intermediate layer 3a is such designed such that in this the infrared radiation-reflecting element 4 and partially the tenth thermoplastic polymer interlayer 3j is arranged. The functional element 6 is arranged between the second thermoplastic polymeric intermediate layer 3b and the tenth thermoplastic polymeric intermediate layer 3j, as viewed in full, within the recess region 5 and substantially in a different plane than the first thermoplastic polymeric intermediate layer 3a. This means that the functional element 6 is arranged in the region of the orthogonal projection of the recess area 5 with respect to the outer pane 1 (marked B in FIG. 13). The tenth thermoplastic polymer interlayer 3j contains PVB and is, for example, 0.38 mm thick. The first thermoplastic polymeric interlayer 3a contains PVB and is, for example, 0.76 mm thick. The controllable functional element 6 is for example a PDLC multilayer film with a thickness of 0.4 mm, consisting of an active layer 11 between two surface electrodes 12, 13 and two carrier foils 14, 15. The active layer 11 contains a polymer matrix with liquid crystals dispersed therein, which align in dependence on the applied voltage to the surface electrodes, whereby the optical properties can be controlled. The carrier films 14, 15 are made of PET and have a thickness of, for example, 0.125 mm. The carrier foils 14, 15 are provided with a coating of ITO having a thickness of approximately 100 nm facing the active layer 11, which form the surface electrodes 12, 13. The surface electrodes 12, 13 are connectable via not shown bus bars (for example, formed by a silver-containing screen printing) and not shown connection cable with the on-board electrical system. In the embodiment shown in FIG. 13, the dimensions (length and width) of the functional element 6 correspond to the dimensions of the infrared radiation reflecting element 4. However, it is also possible that in a composite pane 100 according to the invention the dimensions of the functional element 6 are of those of the infrared radiation reflecting element 4 differ, preferably the functional element 6 is larger in area from the surface than the infrared radiation reflecting element. 4

FIG. 14 shows a cross section through a further embodiment of the composite pane 100 from FIG. 1 along the section line XX '. wherein the embodiment shown in Figure 14 differs from that shown in Figure 13 only in that in the embodiment shown in Figure 14, the side edges 6.1, 6.3 of the functional element 6 are enclosed by a sealing material 16. The Sealing material 16 is dimensioned in the embodiment shown in Figure 14 such that it covers a narrow edge region of 10 mm of the top and bottom of the functional element 6 and the side edges 6.1, 6.3. In the embodiment shown in Figure 14, the sealing material 16 has a thickness of 50 μm. Such a small thickness is preferred in order to avoid pressure points on the functional element 6.

For example, the sealing material 16 consists essentially of PET, ie at least 97% by weight. The sealing material 16 contains less than 0.5% by weight of plasticizer and is suitable for preventing the diffusion of plasticizer from the wide thermoplastic polymer intermediate layer 3b and / or the tenth thermoplastic polymeric intermediate layer 3j into the functional element 6 via the side edges 6.1, 6.3. in particular in its active layer 1 1, to reduce or prevent.

It is understood that further sealing material can be arranged around the side edges 6.2, 6.4 of the functional element 6, which are not shown here, and can enclose the functional element 6 like a frame, for example. In the example shown here, the functional element 6 is not completely covered with the sealing material 16. It is understood that the sealing material 16 may also completely cover the top and the bottom of the functional element 6.

FIG. 15 shows an exemplary embodiment of the method according to the invention with reference to a flow chart.

In step I, an outer pane 1 is presented. In the following step II, a first thermoplastic polymeric interlayer 3a, which has a recess region 5, is arranged flatly on the outer pane 1. In step III, an infrared radiation-reflecting element 4 is arranged flush in the recess area 5. The infrared radiation-reflecting element 4 may be in the form of an XIR bilayer, comprising a first thermoplastic polymer layer 4a and a carrier film with infrared radiation-reflecting coating 4b arranged thereon in the direction of the inner pane 2 or in the direction of the outer pane 1, or in the form of an XIR trilayer. comprising a first thermoplastic polymeric layer 4a, a second thermoplastic polymeric layer 4c and one between the first thermoplastic polymeric layer 4a and the second thermoplastic carrier layer 4c arranged carrier film with infrared radiation reflective coating 4b are present. In step IV, the inner pane 2 is arranged flat on the first thermoplastic polymeric intermediate layer 3a. In step V, then the outer pane 1 and the inner pane 2 are connected by lamination.

FIG. 16 shows a schematic representation of the region of the orthogonal projection of the recess area 9 in the sixth thermoplastic polymer intermediate layer 3f with respect to the outer pane 1. This area is marked with A and the functional element 6 is arranged in this area A.

LIST OF REFERENCE NUMBERS

1 outer pane

2 inner pane

3a first thermoplastic polymeric interlayer

3b second thermoplastic polymeric interlayer

3c third thermoplastic polymeric interlayer

3d fourth thermoplastic polymeric interlayer

3e fifth thermoplastic polymeric interlayer

3f sixth thermoplastic polymeric interlayer

3g seventh thermoplastic polymeric interlayer

3h eighth thermoplastic polymeric interlayer

Third ninth thermoplastic polymeric interlayer

3j tenth thermoplastic polymeric interlayer

4 infrared radiation reflective element

4a first thermoplastic polymer layer

4b carrier film with infrared radiation reflective coating

4c second thermoplastic polymer layer

5 recess area of the first layer 3a

6 functional element with electrically controllable optical properties 6.1, 6.2, 6.3, 6.4 side edge of the functional element 6

7 cover printing

8 recess portion of the third layer 3c

9 recess area of the sixth layer 3f

10 recess area of the seventh layer 3g

11 active layer of the functional element 6

12 surface electrode of the functional element 6

13 surface electrode of the functional element 6

14 carrier film of the functional element 6

15 carrier film of the functional element 6

16 sealing material

100 composite disc A range of the orthogonal projection of the recess 9 with respect to

Outer pane 1

B range of the orthogonal projection of the recess 5 with respect to

Outer pane 1

X-X 'cutting line

Z enlarged area

Claims

claims

1. Composite disc (100) with an infrared radiation reflecting element (4), comprising at least

A stacking sequence of an outer pane (1), a first thermoplastic polymeric intermediate layer (3a) and an inner pane (2), and

An infrared radiation-reflecting element (4) in the form of an XIR bilayer, comprising a first thermoplastic polymer layer (4a) and a carrier film with infrared radiation-reflecting coating (4b) arranged thereon in the direction of the inner pane (2) or outer pane (1), or in the form of an XIR trilayer comprising a first thermoplastic polymeric layer (4a), a second thermoplastic polymeric layer (4c), and an infrared radiation carrier sheet disposed between the first thermoplastic polymeric layer (4a) and the second thermoplastic polymeric layer (4c) reflective coating (4b),

wherein the first thermoplastic polymer interlayer (3a) is disposed between the outer pane (1) and the inner pane (2) and has a recess portion (5) in which the infrared ray reflecting element (4) is disposed.

2. Laminate (100) according to claim 1, wherein between the first thermoplastic polymer intermediate layer (3a) and the inner pane (2), a second thermoplastic polymer intermediate layer (3b) is arranged.

The composite disc (100) according to claim 2, wherein between the second thermoplastic polymer intermediate layer (3b) and the first thermoplastic polymer intermediate layer (3a) is disposed a third thermoplastic polymeric intermediate layer (3c) having a recess portion (8) in which a functional element (6) with electrically controllable properties is arranged.

4. The composite disc (100) according to claim 3, wherein between the first thermoplastic polymer intermediate layer (3a) and the third thermoplastic polymer intermediate layer (3c), a fourth thermoplastic polymer intermediate layer (3d) is arranged.

5. composite disc (100) according to claim 1, wherein between the first thermoplastic polymer intermediate layer (3 a) and the inner pane (2) a stacking sequence of a Functional element (6) having electrically controllable properties, a fifth thermoplastic polymer interlayer (3e) and a sixth thermoplastic polymer interlayer (3f) is arranged, in which the fifth thermoplastic interlayer (3e) between the functional element (6) and the sixth thermoplastic polymer interlayer (3f), the sixth thermoplastic polymer intermediate layer (3f) has a recess region (9) in which the fifth thermoplastic polymer interlayer (3e) is arranged in sections, and the functional element (6) is completely visible within the recess region (9). and disposed substantially in a different plane than the sixth thermoplastic polymer intermediate layer (3f).

6. The composite disc (100) according to claim 2, wherein between the inner disc (2) and the second thermoplastic polymer intermediate layer (3b) or between the first thermoplastic polymer intermediate layer (3a) and the second thermoplastic polymer intermediate layer (3b) a stacking sequence of a functional element (6) having electrically controllable properties, a fifth thermoplastic polymer interlayer (3e) and a sixth thermoplastic polymer interlayer (3f), in which the fifth thermoplastic polymer interlayer (3e) is interposed between the functional element (6) and the sixth thermoplastic polymeric interlayer (3f), the sixth thermoplastic polymer intermediate layer (3f) has a recess region (9) in which the fifth thermoplastic polymer interlayer (3e) is arranged in sections, and the functional element (6) is completely visible within the recess region (9). and in W in a different level than the sixth thermoplastic polymers

Intermediate layer (3f) is arranged.

7. The composite pane (100) according to claim 5, wherein the thickness of the fifth thermoplastic polymer intermediate layer corresponds to at least the thickness of the functional element, preferably greater than the thickness of the functional element.

8. The composite disc (100) according to claim 1, wherein between the first thermoplastic polymer intermediate layer (3a) and the inner disc (2) a seventh thermoplastic polymer interlayer (3g) is arranged, which has a Recess region (10), in which a stacking sequence consists of a functional element (6) with electrically controllable properties and an eighth thermoplastic polymeric intermediate layer (3h) or a stacking sequence of an eighth thermoplastic polymeric intermediate layer (3h), a ninth thermoplastic polymeric intermediate layer (3i) and a functional element (6) arranged therebetween with electrically controllable properties.

9. Laminate (100) according to claim 2, wherein between the first thermoplastic polymer intermediate layer (3a) and the second thermoplastic polymer intermediate layer (3b) a functional element (6) with electrically controllable properties and a tenth thermoplastic intermediate layer (3j) is arranged, the Recess area (5) of the first thermoplastic polymer intermediate layer (3a) is formed such that in this the infrared radiation reflecting element (4) and partially the tenth thermoplastic polymer interlayer (3j) is arranged and the functional element (6) between the second thermoplastic polymer interlayer (3b) and the tenth thermoplastic polymer interlayer (3j) are arranged in transection completely within the recess area (5) and substantially in a different plane than the first thermoplastic polymer interlayer (3a).

10. Composite pane (100) according to one of claims 3 to 9, wherein the functional element (6) with electrically controllable properties is a polymer dispersed liquid crystal (PDLC) element or a suspended particle device (SPD element), preferably a PDLC Foil.

11. Laminate (100) according to one of claims 3 to 10, wherein at least one of the side edges (6.1, 6.2, 6.3, 6.4) of the functional element (6) or the entire functional element (6) by a sealing material (16) is enclosed and the Sealant material (16) is preferably plasticizer-poor or plasticizer-free and particularly preferably contains or consists of polyethylene terephthalate (PET) or polyethylene (PE).

12. The composite disc (100) according to any one of claims 1 to 11, wherein the first thermoplastic polymer interlayer (3a) is formed of a plurality of portions surrounding the infrared radiation reflecting member (4) like a frame.

13. A composite pane (100) according to any one of claims 1 to 12, wherein on the inside of the outer pane (1) and / or the outer side of the inner pane (2), a peripheral covering pressure (7), preferably of an opaque enamel, is applied, and the peripheral covering pressure (7) preferably conceals at least two of the side edges (4.1, 4.2, 4.3, 4.4) of the infrared radiation-reflecting element (4) when viewed through the composite pane (100).

14. A method for producing a composite pane (100) according to any one of claims 1 to 13, wherein at least:

a) an outer pane (1), a first thermoplastic polymers

Intermediate layer (3a), which has a recess area (5), and an inner pane (2) are arranged one above the other in this spatial sequence, wherein in the recess area (5) an infrared radiation reflecting element (4) in the form of an XIR bilayer comprising first thermoplastic polymer layer (4a) and a carrier film with infrared radiation-reflecting coating (4b) arranged thereon in the direction of the inner pane (2) or the outer pane (1), or in the form of an XIR trilayer, comprising a first thermoplastic polymer layer (4a) a second thermoplastic polymer layer (4c) and a carrier film with infrared radiation-reflecting coating (4b) arranged between the first thermoplastic polymer layer (4a) and the second thermoplastic polymer layer (4c) are arranged,

b) the outer pane (1) and the inner pane (2) are connected by lamination.

15. Use of a composite pane (100) according to one of claims 1 to 13 as interior glazing or exterior glazing in a vehicle, a building, preferably as a vehicle window, particularly preferably as a roof window, side window, windscreen or rear window, very particularly preferably as a roof window.