WO2020094421A1 - Vitre stratifiée destinée à un affichage tête haute - Google Patents

Vitre stratifiée destinée à un affichage tête haute Download PDF

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Publication number
WO2020094421A1
WO2020094421A1 PCT/EP2019/079136 EP2019079136W WO2020094421A1 WO 2020094421 A1 WO2020094421 A1 WO 2020094421A1 EP 2019079136 W EP2019079136 W EP 2019079136W WO 2020094421 A1 WO2020094421 A1 WO 2020094421A1
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WO
WIPO (PCT)
Prior art keywords
pane
intermediate layer
wedge
thermoplastic intermediate
composite
Prior art date
Application number
PCT/EP2019/079136
Other languages
German (de)
English (en)
Inventor
Stephan GIER
Valentin SCHULZ
Raphaela KANNENGIESSER
Original Assignee
Saint-Gobain Glass France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint-Gobain Glass France filed Critical Saint-Gobain Glass France
Priority to CN201980003504.XA priority Critical patent/CN111417517A/zh
Publication of WO2020094421A1 publication Critical patent/WO2020094421A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10559—Shape of the cross-section
    • B32B17/10568—Shape of the cross-section varying in thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10678—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising UV absorbers or stabilizers, e.g. antioxidants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10724—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing polyamide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/1077—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10981—Pre-treatment of the layers

Definitions

  • the invention relates to a composite pane for a head-up display, a method for its production and its use.
  • Laminated windows are used in many places these days, especially in vehicle construction.
  • vehicle includes road vehicles, airplanes, ships, agricultural machines or work equipment.
  • Laminated panes are also used in other areas. These include, for example, building glazing or information displays, e.g. in museums or as advertising displays.
  • a composite pane generally has two panes that are laminated to an intermediate layer.
  • the panes themselves can have a curvature and are generally of constant thickness.
  • the intermediate layer generally has a thermoplastic material, preferably polyvinyl butyral (PVB), of a predetermined thickness, e.g. 0.76 mm.
  • PVB polyvinyl butyral
  • Composite panes are also often used as a head-up display (HUD) for displaying information.
  • An image is projected onto the laminated glass panes by means of a projection device in order to display information to the viewer in the field of vision.
  • the projection device is arranged, for example, on the dashboard, so that the projected image is reflected on the closest glass surface of the laminated glass pane inclined towards the viewer in the direction of the viewer (see, for example, the European patent EP 0 420 228 B1 or the German patent application DE 10 2012 21 1 729 A1).
  • a pure classical compensation of ghost images leads to an overcompensation for double images in transmission being observed. This leads to the viewer becoming irritated or, in the worst case, receiving incorrect information. So far, attempts have been made to solve this problem by arranging the surfaces of the disks no longer in parallel, but at a fixed angle. This is achieved, for example, in that the intermediate layer is wedge-shaped with a continuously linear and / or non-linearly increasing and / or decreasing thickness. In vehicle construction, the thickness is typically varied such that the smallest thickness is provided at the lower end of the laminated glass pane towards the engine compartment, while the thickness increases toward the roof.
  • a wedge-shaped composite pane can also be realized by arranging an intermediate layer of constant thickness between two glass panes, at least one of which has a wedge-shaped cross section.
  • EP 3 248 949 A1 and US Pat. No. 7,122,242 B2 disclose methods for the production of float glass panes with a wedge-shaped cross section, as well as composite panes comprising two float glass panes and an intermediate layer, at least one of the float glass panes having a wedge-shaped cross section.
  • US 2017/0305240 A1 and JP 2017-105665 disclose composite panes comprising two glass panes and an intermediate layer therebetween, at least one of the glass panes having a wedge-shaped cross section and the intermediate layer being able to have a wedge angle.
  • the object of the present invention is to provide an improved composite pane for a head-up display with a defined wedge-shaped cross section.
  • the present invention has for its object to provide a manufacturing method for a composite pane for a head-up display, with which the wedge angle of a composite pane can be easily adjusted.
  • the composite pane according to the invention has an upper pane edge, a lower pane edge and two lateral pane edges and comprises an outer pane and an inner pane which are connected to one another via a thermoplastic intermediate layer.
  • the outer pane and the inner pane each have an outside and an inside surface and a circumferential edge running between them, which is formed from the top edge, the bottom edge and the two side edges of the respective pane.
  • thermoplastic intermediate layer has an outer and an inner side surface and a circumferential edge running therebetween, which is formed from the upper edge, the lower edge and the two side edges of the thermoplastic intermediate layer.
  • the outer pane, the thermoplastic intermediate layer and the inner pane are arranged flat one above the other in such a way that the upper edges, the lower edges and the two side edges of the outer pane, the inner pane and the thermoplastic intermediate layer each in the Are arranged substantially congruently one above the other.
  • the upper pane edge of the composite pane according to the invention is formed by the upper edges of the outer pane, the thermoplastic intermediate layer and the inner pane
  • the lower pane edge of the composite pane according to the invention is formed by the lower edges of the outer pane
  • Composite panes are formed by the side edges of the outer pane, the thermoplastic intermediate layer and the inner pane.
  • the upper edge of the pane or the upper edge denotes that edge of the composite pane or its components which is intended to point upwards in the installed position.
  • the lower edge of the pane or lower edge is the edge which is intended to point downwards in the installed position. If the composite windshield is the windshield of a motor vehicle, the upper edge of the window or the upper edge is often also referred to as the roof edge and the lower edge of the window or the lower edge as the engine edge.
  • the outside surface is the main surface which is intended to face the external environment in the installed position.
  • the interior surface is the main surface which is intended to face the interior in the installed position.
  • the interior surface of the outer pane and the outer surface of the inner pane face one another and are connected to one another by the thermoplastic intermediate layer.
  • the outer pane has a wedge-shaped cross section with the greatest linear thickness increase along a second direction R2 of the shortest connecting line between the lower edge of the outer pane and the upper edge of the outer pane and / or the inner pane has a wedge-shaped cross section with the greatest linear thickness increase along a fourth direction R4 the shortest connecting line between the lower edge of the inner pane and the upper edge of the inner pane.
  • the outer pane has a thicker first end and a thinner second end and / or the inner pane has a thicker first end and a thinner second end.
  • the thermoplastic intermediate layer has a wedge-shaped cross section with the greatest linear increase in thickness along a sixth direction R6, the sixth direction R6 being at an angle ⁇ different from 0 ° to a seventh direction R7 of the shortest connecting line between the lower edge of the thermoplastic intermediate layer and the upper edge the thermoplastic intermediate layer is rotated.
  • the angle a is greater than 0 ° and less than 90 °, preferably this is greater than 0 ° and less than 45 °, particularly preferably greater than 0 ° and less than 30 ° and very particularly preferably greater than 0 ° and less than 15 °. It goes without saying that when specifying the dimensions of the angle, it can mean both the clockwise and the counterclockwise angle.
  • the thickness increases from the lower edge to the upper edge.
  • the thicker end of the composite washer is thus on the upper edge and the thinner end on the lower edge of the composite washer.
  • the outer pane and the inner pane are arranged in the composite pane according to the invention in such a way that the ends with the greater thickness are each arranged one above the other and the ends with the smaller thickness are each arranged one above the other.
  • both the outer pane and the inner pane are wedge-shaped, i.e.
  • the outer pane has a wedge-shaped cross section and the inner pane also has a wedge-shaped cross section.
  • only one of the two panes of the composite panes to have a wedge-shaped cross section.
  • only the outer pane has a wedge-shaped cross section and the inner pane has no wedge-shaped cross section.
  • only the inner pane has a wedge-shaped cross section and the outer pane has no wedge-shaped cross section.
  • the sum of the wedge angle of the outer pane and the wedge angle of the inner pane is preferably 0.05 mrad to 0.9 mrad. This means that if only one of the two disks has a wedge-shaped cross section, it preferably has a wedge angle of 0.05 mrad to 0.9 mrad.
  • the wedge angle of the composite pane according to the invention is preferably 0.1 mrad to 1.0 mrad, particularly preferably 0.15 mrad to 0.75 mrad, very particularly preferably 0.3 mrad to 0.7 mrad.
  • the thermoplastic intermediate layer preferably has a wedge angle in the range of 0.01 mrad to 0.15 mrad, preferably 0.01 mrad to 0.1 mrad along the direction R7, i.e. along the shortest connecting line between the lower edge and the upper edge of the thermoplastic intermediate layer, the wedge angle of the thermoplastic intermediate layer preferably being smaller than the sum of the wedge angle of the outer pane and the wedge angle of the inner pane.
  • thermoplastic intermediate layer is a wedge-shaped extruded intermediate layer.
  • thermoplastic intermediate layer is an stretched intermediate layer.
  • the thermoplastic intermediate layer contains at least polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU) or mixtures or copolymers or derivatives thereof, preferably polyvinyl butyral (PVB), particularly preferably polyvinyl butyral (PVB) and plasticizers.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • PU polyurethane
  • PVB polyvinyl butyral
  • plasticizers plasticizers
  • the thermoplastic intermediate layer can be formed by a single film or by more than one film.
  • the thermoplastic intermediate layer can be a functional intermediate layer, in particular an intermediate layer with acoustically damping properties, an intermediate layer reflecting infrared radiation, an intermediate layer absorbing infrared radiation, an intermediate layer absorbing UV radiation, a colored intermediate layer and / or a tinted intermediate layer.
  • the thermoplastic intermediate layer is a functional intermediate layer with acoustically damping properties.
  • Such an acoustic intermediate layer typically consists of at least three layers, the middle layer having a higher plasticity or elasticity than the outer layers surrounding it, for example as a result of a higher proportion of plasticizers.
  • the thermoplastic intermediate layer is a functional intermediate layer with a color function.
  • the thermoplastic intermediate layer is colored or tinted.
  • the coloring or tinting is designed such that the composite pane has a light transmission of greater than 70% in the spectral range from 380 nm to 780 nm.
  • the coloring or tinting can also be darker and the composite panes thus have a light transmission of 70% or less in the spectral range from 380 nm to 780 nm. It goes without saying that in the case of a windshield in embodiments, the transmission outside the visible range, in particular in the region adjacent to the roof edge, can also be less than 70%.
  • thermoplastic intermediate layer is a functional intermediate layer with a solar function, in particular with properties that absorb infrared radiation, such as, for example, a PVB film in which particles of indium tin oxide (ITO) are contained.
  • a solar function in particular with properties that absorb infrared radiation
  • ITO indium tin oxide
  • the thermoplastic intermediate layer is designed as an element reflecting infrared radiation, for example as an bilayer comprising infrared radiation comprising a first layer and a carrier film arranged thereon with a coating reflecting infrared radiation, or a trilayer reflecting infrared radiation comprising a first layer, a second layer and an intermediate layer Carrier film with coating reflecting infrared radiation.
  • the thermoplastic intermediate layer can also be a functional intermediate layer in which two or more functional properties are combined, for example acoustically damping properties with a color function and / or a solar function.
  • the composite pane according to the invention can comprise one or more additional intermediate layers, in particular additional functional intermediate layers, these additional intermediate layers being of essentially constant thickness. I.e. the one or more additional intermediate layers have no wedge angle.
  • An additional intermediate layer can in particular be an element reflecting infrared radiation, an ultraviolet radiation absorbing layer, a tinted or colored layer, a barrier layer or a combination thereof. If there are several additional intermediate layers, these can also have different functions.
  • the one or more additional intermediate layers contain at least polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU) or mixtures or copolymers or derivatives thereof, preferably polyvinyl butyral (PVB), particularly preferably polyvinyl butyral (PVB) and plasticizers.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • PU polyurethane
  • PVB polyvinyl butyral
  • plasticizers plasticizers
  • the outer pane and / or the inner pane can have anti-reflective coatings, non-stick coatings, anti-scratch coatings, photocatalytic coatings, electrically heatable coatings, sun protection coatings and / or low-E coatings.
  • the thickness of the outer pane and the inner pane can vary widely and can thus be adapted to individual requirements.
  • the outer pane and the inner pane preferably have thicknesses of 1 mm to 5 mm, particularly preferably from 1 mm to 3 mm, the greatest thickness being meant in each case in the case of wedge-shaped panes.
  • the outer pane at the thicker first end is 2.1 mm thick and the inner pane at the thicker first end is 1.6 mm thick.
  • the outer pane or in particular the inner pane can also be thin glass with a thickness of, for example, 0.55 mm.
  • the thickness of the thermoplastic intermediate layer is, for example, 0.76 mm to 0.84 mm at the thickest point and, for example, at least 0.55 mm, preferably at least 0.65 mm, at the thinnest point, with the proviso that the thickness is at the thinnest Point is less than the thickness at the thickest point.
  • Thermoplastic films in particular PVB films, are sold in standard thicknesses such as 0.38 mm and 0.76 mm. However, thermoplastic films, in particular PVB films, are sold in thicknesses of 1.14 mm or 1.52 mm. Thermoplastic films with acoustic damping properties are sold, for example, in thicknesses of 0.50 mm and 0.84 mm.
  • wedge-shaped stretched thermoplastic intermediate layers can be produced from all of these foils.
  • the height of the outer pane and the inner pane i.e. in the case of a windshield, the distance between the roof edge of the composite pane and the motor edge of the composite pane is preferably between 0.8 m and 1.40 m, particularly preferably between 0.9 m and 1.25 m. It goes without saying that the height of the thermoplastic intermediate layer and the optional additional intermediate layers is therefore preferably between 0.8 m and 1.40 m, particularly preferably between 0.9 m and 1.25 m.
  • the composite pane according to the invention can be a vehicle pane.
  • a vehicle window is provided to separate a vehicle interior from an external environment.
  • a vehicle window is therefore a window pane which is inserted into a window opening in the vehicle body or is provided for this purpose.
  • a composite pane according to the invention is in particular a windshield of a motor vehicle.
  • the inner window is the window which is intended to face the interior of the vehicle in the installed position.
  • the outer pane is the pane which is intended to face the external environment of the vehicle in the installed position.
  • the outer pane and the inner pane can, independently of one another, be clear and colorless, but also tinted, cloudy or colored.
  • the total transmission through the composite pane is greater than 70%, in particular if the composite pane is a windshield.
  • the term total transmission refers to the procedure for testing the light transmission of motor vehicle windows as defined by ECE-R 43, Appendix 3, ⁇ 9.1.
  • the outer pane and the inner pane can consist of non-toughened, partially toughened or toughened glass.
  • a composite pane according to the invention can additionally comprise a cover print, in particular made of a dark, preferably black, enamel.
  • the masking print is in particular a peripheral, i.e. frame-like, masking print.
  • the peripheral masking print serves primarily as UV protection for the assembly adhesive of the composite pane.
  • the masking print can be opaque and cover the entire surface.
  • the masking print can also be semitransparent, at least in sections, for example as a dot pattern, strip pattern or checkered pattern.
  • the cover print can also have a gradient, for example from an opaque cover to a semi-transparent cover.
  • the masking pressure is usually applied to the interior surface of the outer pane or to the interior surface of the inner pane.
  • the outer pane and / or the inner pane has a wedge-shaped cross section.
  • the outer pane and / or inner pane is preferably a float glass with a wedge-shaped cross section produced using the float glass process. It can be, for example, a quartz glass, borosilicate glass, aluminosilicate glass or preferably a soda-lime glass.
  • the inner pane has an essentially constant thickness and can be made of soda-lime glass, as is customary for window panes, using the float glass process.
  • the inner pane can also be made from other types of glass, for example quartz glass, borosilicate glass or aluminosilicate glass.
  • the inner pane in this case can also not be produced using the float glass process and made of rigid, clear plastics, for example polycarbonate or polymethyl methacrylate.
  • the outer pane has an essentially constant thickness and can be made of soda-lime glass, as is customary for window panes, using the float glass process.
  • the outer pane can also be made from other types of glass, for example quartz glass, borosilicate glass or aluminosilicate glass.
  • the outer pane in this case cannot be produced using the float glass process and can be made of rigid, clear plastics, for example polycarbonate or polymethyl methacrylate.
  • the outer pane and / or the inner pane is a flat glass, in particular a float glass produced in a float glass process.
  • an essentially constant thickness of a layer is understood to mean that the thickness of the layer is constant over the length and width within the scope of normal manufacturing tolerances. This preferably means that the thickness does not vary by more than 5%, preferably by not more than 3%.
  • a glass melt is directed from one side onto a bath made of liquid tin (float bath).
  • float bath liquid tin
  • the temperature at the entrance to the tin bath is approximately 1000 ° C.
  • the lighter glass melt floats on the tin and spreads evenly on the tin surface.
  • the solidified glass is continuously pulled out in the form of a ribbon and then cooled. After sufficient cooling, glass sheets of the desired size are cut to length from the glass ribbon, from which, for example, glass panes for windscreens can then be cut out.
  • the equilibrium thickness of the glass is determined by the distribution of the glass melt on the tin bath.
  • the glass is pulled out of the tin bath by actively driven (top) rollers, whereby the glass band is stretched.
  • the thickness of the glass can be set via the speed of the rollers, a higher speed being set for the production of thinner glasses and, accordingly, a lower speed of the rollers for thicker glasses. For example, if the speed of the rollers in the side areas of the glass ribbon is greater than that in the In the middle of the glass ribbon, a glass ribbon with a plano-convex cross section can be produced, from which wedge-shaped panes can be cut out
  • both glass surfaces have elongated elevations and depressions in a parallel arrangement, each of which extends from the tin bath in the direction of pull of the glass ribbon.
  • the elongated elevations and depressions correspond to wave crests and wave troughs, which are arranged alternately perpendicular to the direction of pull.
  • the glass panes with their longer dimensions are cut out of the tin bath in the pulling direction of the glass ribbon, so that the float lines extend parallel to the longer dimensions of the glass panes.
  • Wedge-shaped thermoplastic intermediate layers which are produced by extrusion of a film with a wedge-shaped cross section or by stretching a film produced in the extrusion process with a substantially constant thickness, are typically characterized by an undesirable waviness caused by the production.
  • the surfaces of the thermoplastic intermediate layer have a plurality of elongate elevations (wave crests) and elongate depressions (wave troughs) which extend along a fifth (foil) direction R5 and in a sixth (foil) perpendicular to the fifth (foil) direction R5 -) Direction R6 are arranged alternately.
  • the fifth direction R5 corresponds to the extrusion direction of the thermoplastic intermediate layer.
  • the sixth direction R6 corresponds to the direction of the greatest linear increase in thickness of the thermoplastic intermediate layer.
  • the elongated elevations and elongated depressions of the thermoplastic intermediate layer are typically parallel to one another and arranged in an alternating sequence.
  • the elongated elevations (wave crests) and depressions (wave valleys) describe in the sense of the invention the manufacturing-related, actually undesirable surface ripple.
  • the distance between adjacent elevations or the distance between adjacent depressions is typically greater than or equal to 50 mm. This is to be distinguished from a desired surface roughness, which is often deliberately embossed in the form of elongated elevations and depressions in the film surface in order to prevent ventilation Favor laminating a composite pane, the distance between adjacent elevations or depressions is typically less than 1 mm.
  • thermoplastic intermediate layer with the production-related ripple of a pane can lead to an adverse impairment of the optical properties of a laminated glass in which this thermoplastic intermediate layer is laminated between a first pane and a second pane.
  • This effect is particularly pronounced if the production-related undulations of the thermoplastic intermediate layer and the first pane and / or the second pane overlap. If, for example, windshields in motor vehicles are tilted from one side to the other or from top to bottom, objects can appear distorted by a locally different optical refractive power.
  • thermoplastic intermediate layer exhibits the greatest linear thickness increase along a sixth direction R6, which is rotated by the angle a different from 0 ° to the seventh direction R7 of the shortest connecting line between the lower edge and the upper edge of the thermoplastic intermediate layer
  • the manufacturing-related ripples of the thermoplastic intermediate layer are also rotated by the angle a to the manufacturing-related ripples of the outer disk, which is designed as a disk with a wedge-shaped cross section, and / or to the manufacturing-related ripples of the inner disk, which is designed as a disk with a wedge-shaped cross-section.
  • the production-related ripple of the wedge-shaped outer pane and / or inner pane does not overlap with the production-related ripple of the thermoplastic intermediate layer.
  • the optical properties of the composite pane according to the invention are therefore improved compared to the optical properties of a composite pane in which the thermoplastic intermediate layer exhibits the greatest linear increase in thickness along the shortest connecting line from the lower edge to the upper edge.
  • the angle a is greater than 0 ° and less than 90 °, preferably greater than 0 ° and less than 45 °, particularly preferably greater than 0 ° and less than 30 ° and very particularly preferably greater than 0 ° and less than 15 °
  • the composite pane according to the invention is preferably bent in one or more directions in space, as is customary for motor vehicle panes, typical Radii of curvature range from about 10 cm to about 40 m.
  • the laminated glass can also be flat, for example if it is intended as a pane for buses, trains or tractors.
  • the composite pane according to the invention can be used as a head-up display (HUD) for displaying information.
  • HUD head-up display
  • the invention also relates to a projection arrangement for a head-up display (HUD) at least comprising a composite pane according to the invention and a projector.
  • HUD head-up display
  • the projector illuminates an area of the windshield where the radiation is reflected in the direction of the viewer (driver), which creates a virtual image that the viewer sees from behind the windshield.
  • the area of the windshield that can be irradiated by the projector is referred to as the HUD area.
  • the beam direction of the projector can typically be varied by mirrors, in particular vertically, in order to adapt the projection to the size of the viewer.
  • the area in which the viewer's eyes must be at a given mirror position is called the eyebox window.
  • This eyebox window can be moved vertically by adjusting the mirrors, the entire area accessible thereby (ie the overlay of all possible eyebox windows) being referred to as an eyebox.
  • An observer inside the eyebox can perceive the virtual image. Of course, this means that the viewer's eyes have to be inside the eyebox, not the entire body.
  • the invention also relates to a method for producing a composite pane for a head-up display (HUD), the composite pane being an outer pane, an inner pane and has a thermoplastic intermediate layer arranged between the outer pane and the inner pane with a wedge-shaped cross section and the outer pane and / or the inner pane has a wedge-shaped cross section, and in the method at least:
  • an outer pane is provided with an upper edge, a lower edge and two side edges and an inner pane with an upper edge, a lower edge and two side edges, the outer pane having a wedge-shaped cross section with the greatest linear thickness increase along a second direction R2 of the shortest connecting line between the Has lower edge and the upper edge and / or the inner pane has a wedge-shaped cross section with the greatest linear increase in thickness along a fourth direction R4 of the shortest connecting line between the lower edge and the upper edge;
  • thermoplastic intermediate layer with a wedge-shaped cross section is provided as rolled goods
  • thermoplastic layer having an upper edge and a lower edge and two side edges, i.e. a thermoplastic intermediate layer in the form of a disc, from which the thermoplastic intermediate layer with a wedge-shaped cross section is cut out as a roll product, in such a way that the thermoplastic intermediate layer has a wedge-shaped cross section with the greatest linear increase in thickness along a sixth direction R6, the sixth direction R6 being different from 0 ° Angle a is rotated to a seventh direction R7 of the shortest connecting line between the lower edge and the upper edge of the thermoplastic intermediate layer;
  • thermoplastic intermediate layer is arranged flat between the outer pane and the inner pane;
  • the thermoplastic intermediate layer with a wedge-shaped cross section as rolled goods can be produced by extrusion of a wedge-shaped thermoplastic intermediate layer or by stretching a thermoplastic intermediate layer with a constant thickness.
  • the thermoplastic intermediate layer with a constant thickness, or at least individual foils thereof, can preferably be produced in the extrusion process.
  • the wedge angle of an stretched thermoplastic intermediate layer as a roll can be adjusted by choosing a suitable stretching cone. The person skilled in the art knows which stretching cone in Depending on the wedge angle aimed for the stretched thermoplastic intermediate layer must be used in the stretching process.
  • the method can additionally comprise the steps of providing at least one additional intermediate layer and arranging it independently of one another between the outer pane and the thermoplastic intermediate layer or between the inner pane and the thermoplastic intermediate layer.
  • the at least one additional intermediate layer has a substantially constant thickness.
  • an additional intermediate layer it can thus be arranged between the outer pane and the thermoplastic intermediate layer or between the inner pane and the thermoplastic intermediate layer.
  • more than one additional intermediate layer these can thus either be arranged between the outer pane and the thermoplastic intermediate layer or between the inner pane and the thermoplastic intermediate layer, or additional layers can be provided both between the outer pane and the thermoplastic intermediate layer and between the inner pane and the thermoplastic intermediate layer Intermediate layers can be arranged.
  • the at least one additional intermediate layer is preferably a functional intermediate layer, in particular an IR-reflecting layer, a UV-absorbing layer, a tinted or colored layer, a barrier layer or a combination thereof. If there are several additional intermediate layers, these can also have different functions.
  • According to the invention is also a method for producing a composite pane with a desired wedge angle K1, at least:
  • an outer pane and an inner pane are provided, the outer pane and / or the inner pane having a wedge-shaped cross section and the sum KS of the wedge angle K2 of the outer pane and the wedge angle K3 of the inner pane being smaller than the desired wedge angle K1;
  • thermoplastic intermediate layer with a wedge-shaped cross section is provided as a roll product, the wedge angle K5 of the thermoplastic intermediate layer as a roll product being greater than the difference KD;
  • the angle a is determined by which the shortest connecting line between the lower edge and the upper edge of the thermoplastic intermediate layer in the form of a disc must deviate from the direction R6 along the greatest linear increase in thickness of the thermoplastic intermediate layer by a wedge angle K4 of the thermoplastic intermediate layer along the shortest To obtain the connecting line between the lower edge and the upper edge, which corresponds to the difference KD;
  • thermoplastic intermediate layer in the form of a disk is cut out of the thermoplastic intermediate layer as a roll product in such a way that the thermoplastic intermediate layer has a wedge-shaped cross section with the greatest linear increase in thickness along the sixth direction R6, the sixth direction R6 being at an angle a to the shortest connecting line is rotated between the lower edge and the upper edge of the thermoplastic intermediate layer in the form of a disk;
  • thermoplastic intermediate layer is arranged flat between the outer pane and the inner pane
  • the angle a can be calculated as follows:
  • the angle a is greater than 0 ° and less than 90 °, preferably greater than 0 ° and less than 45 °, particularly preferably greater than 0 ° and less than 30 ° and very particularly preferably greater than 0 ° and less than 15 °.
  • the method according to the invention offers the advantage that the introduction of a thermoplastic intermediate layer with a wedge-shaped cross section rotated by the angle ⁇ makes it possible to fine-tune the wedge angle, since when rotating a wedge-shaped film the wedge angle is slightly reduced when measured in the same direction.
  • the wedge angle of the intermediate layer is therefore simply fine-tune by selecting a suitable angle through which the thermoplastic intermediate layer is rotated.
  • panes with different wedge angles are significantly more complex, so that generally only panes with a number of specific wedge angles, for example 0.1 mrad, 0.2, mrad, 0.3 mrad, 0, 4 mrad, 0.5 mrad, 0.6 mrad can be manufactured.
  • the use of a twisted thermoplastic intermediate layer with a wedge-shaped cross section makes it easy to fine-tune the wedge angle of a composite pane made of an outer pane and an inner pane and a thermoplastic intermediate layer, the outer pane and / or the inner pane having a wedge-shaped cross section.
  • an outer washer with a wedge angle of 0.5 mrad an inner washer of constant thickness (wedge angle equal to 0 mrad) and a twisted thermoplastic intermediate layer with a wedge angle along the shortest connecting line from the lower edge laminated to the top edge of 0.05 mrad.
  • the outer pane and the inner pane are preferably subjected to a bending process before the lamination.
  • the outer pane and the inner pane are preferably bent congruently together (i.e. at the same time and by the same tool), because this way the shape of the panes is optimally coordinated for the later lamination.
  • Typical temperatures for glass bending processes are, for example, 500 ° C to 700 ° C.
  • the invention also relates to the use of a composite pane according to the invention as a vehicle pane in means of transportation for traffic on land, in the air or on water, in particular in motor vehicles and in particular in a windshield in a motor vehicle.
  • Fig. 1 is a schematic representation of the arrangement of individual disks when
  • FIG. 2 shows a cross-sectional view of a single disc produced in the float process with a wedge-shaped cross section along the section line X-X 'shown in FIG. 1;
  • Fig. 3 is a schematic representation of a thermoplastic intermediate layer as
  • FIG. 4 shows a section of a cross-sectional view of an embodiment of the thermoplastic intermediate layer as a roll product along the section line A-A shown in FIG. 3;
  • Fig. 5 is a schematic representation in which arrangement the thermoplastic
  • thermoplastic intermediate layer in disc form is cut out of the thermoplastic intermediate layer as a roll;
  • Fig. 6 is an exploded view of an embodiment of an inventive
  • FIG. 7 shows an exploded view of a further embodiment of a composite pane according to the invention.
  • FIG. 8 shows an exploded view of a further embodiment of a composite pane according to the invention.
  • Fig. 9 shows a cross section of an embodiment of an inventive
  • FIG. 10 shows a flow diagram of an embodiment of the method according to the invention.
  • FIG. 1 shows a schematic representation of the arrangement of individual panes 5 when cutting out individual panes from flat glass produced in the float process with wedge-shaped cross section 5 from the glass ribbon 6 produced in the float process, which has a plano-convex cross section.
  • the first direction R1 and the third direction R3 correspond to the pulling direction of the glass ribbon 6 in the float process.
  • the second direction R2 and the fourth direction R4 run along the shortest connecting line from the lower edge U5 to the upper edge 05 of the respective individual pane 5 and thus perpendicular to the first direction R1 and the third direction R3.
  • FIG. 2 shows a cross-sectional view of a single disc with a wedge-shaped cross section 5 produced in the float process along the section line XX ′ shown in FIG. 1.
  • the individual pane 5 shown in FIG. 2 can be, for example, the outer pane 2 of a laminated glass 1 according to the invention. However, the individual pane 5 shown in FIG. 2 can also be the inner pane 3 of a laminated glass according to the invention. In a laminated glass 1 according to the invention, both the outer pane 2 and the inner pane 3 can also be formed as shown in FIG. 2.
  • the single pane 5 shown in cross section in FIG. 2 has elevations 8 and depressions 9 on the surfaces 12, 12 ', which extend perpendicular to a shortest connecting line between the top 05 and the bottom U5.
  • the single pane shown in cross section in FIG. 2 has, for example, a thickness of 2.1 mm at the thicker end and a wedge angle of 0.7 mrad and consists, for example, of soda-lime glass.
  • thermoplastic intermediate layer as roll goods 15 has a wedge-shaped cross section and is formed, for example, from a single layer of thermoplastic material, for example from a PVB film with a thickness of 0.76 mm at the thicker end. Alternatively, it can be made of another suitable material such as polyamide or polyethylene.
  • the thermoplastic intermediate layer as roll goods 15 is produced by extrusion of a wedge-shaped intermediate layer or by stretching a thermoplastic intermediate layer produced in the extrusion process with a substantially constant thickness, the direction of extrusion in each case corresponding to the winding or unwinding direction of the roll 15.
  • the direction of extrusion or unwinding is identified by the direction R5 and the direction of the greatest linear increase in thickness of the thermoplastic intermediate layer is identified by the direction R6.
  • FIG. 4 shows a section of a cross-sectional view of the thermoplastic intermediate layer as roll goods 15 according to the section line AA shown in FIG. 3. It can be seen that the thickness of the thermoplastic intermediate layer as roll goods 15 increases from A in direction A.
  • the thickness of the thermoplastic intermediate layer as roll goods 15 is, for example, 0.76 mm at the thickest point.
  • the surfaces 13, 13 'of the thermoplastic intermediate layer as rolled goods have a plurality of protruding from the surface, elongated elevations 10 and the surface of deepening, elongated depressions 1 1 in a parallel arrangement.
  • the elevations 10 and depressions 11 each extend in the extrusion direction R5 (not shown in FIG. 4).
  • the elevations 10 and depressions 11 are arranged alternately transversely to the extrusion direction, that is to say in the direction R6.
  • the elevations 10 and depressions 11 are wave-shaped, so that the surfaces 13, 13 'of the thermoplastic intermediate layer as rolls 15 have an undulation.
  • FIG. 5 shows schematically the arrangement in which the thermoplastic intermediate layer 4 is cut out in the form of a disc from the thermoplastic intermediate layer as roll goods 15.
  • 5 corresponds to the thermoplastic intermediate layer as roll goods 15 of FIG. 3.
  • the shortest connecting line from the lower edge U4 to the upper edge 04 of the thermoplastic intermediate layer 4 also has the shape of a disk the direction R7 is designated.
  • the direction R6 along which the thermoplastic intermediate layer exhibits the greatest linear increase in thickness is rotated by an angle a (not shown in FIG. 5) to the direction R7.
  • the direction R6 is rotated, for example, by 45 ° to the direction R7.
  • the composite pane 1 is constructed from an outer pane 2 and an inner pane 3, which are connected to one another via a thermoplastic intermediate layer 4.
  • the outer pane 2 faces the external environment
  • the inner pane 3 faces the vehicle interior.
  • the lower edge U2 of the outer pane 2, the lower edge U4 of the thermoplastic intermediate layer 4 and the lower edge U3 of the inner pane 3 are arranged flush above one another in the composite pane 1, the upper edge 02 of the outer pane 2, the upper edge 04 of the thermoplastic intermediate layer 4 and the upper edge 03 of the inner pane 3 are also arranged flush one above the other in the composite pane 1.
  • the side edges S2, S3 and S4 of the outer pane 2, the inner pane 3 and the thermoplastic intermediate layer 4 are each arranged flush with one another.
  • the outer pane 2 has, for example, a wedge angle of 0.3 mrad with the greatest linear increase in thickness along a second direction R2 of the shortest connecting line between the lower edge U2 and the upper edge 02, for example with a thickness of 2.1 mm at the thicker end.
  • the inner pane 3 has, for example, a wedge angle of 0.3 mrad with the greatest linear increase in thickness along a second direction R4 of the shortest connecting line between the lower edge U3 and the upper edge 03, for example with a thickness of 1.6 mm at the thicker end.
  • the thermoplastic intermediate layer 4 has a wedge-shaped cross section with the greatest linear increase in thickness along the direction R6 and is formed, for example, from a single layer of thermoplastic material, for example from a PVB film with a thickness of 0.76 mm at the thickest point.
  • the direction R6 is rotated by an angle a to the direction R7 along the shortest connecting line between the lower edge U4 and the upper edge 04.
  • the thermoplastic intermediate layer 4 has, for example, a wedge angle of 0.03 mrad along the direction R7.
  • the angle a is 45 ° measured clockwise.
  • FIG. 7 shows a further exploded view of an embodiment of a composite pane 1 according to the invention.
  • the composite pane 1 comprises an outer pane 2 and an inner pane 3 and an intermediate thermoplastic layer 4.
  • the embodiment shown in FIG. 7 essentially corresponds to that in FIG. 6 shown embodiment.
  • the thermoplastic intermediate layer 4 has a plurality of elongate elevations 10 projecting from the surfaces 13, 13 'and elongated depressions 11 deepening the surface in a parallel arrangement.
  • the elevations 10 and depressions 11 each extend along a direction which is denoted by the arrow R5 in FIG. 7. Transverse to direction R5, i.e.
  • the elevations 10 and depressions 11 are arranged alternately along the direction R6.
  • the elevations 10 and depressions 1 1 are wave-shaped.
  • the outer pane 2 and the inner pane 3 are designed as wedge-shaped flat glass 5 produced in the float process and, due to the manufacturing process, have a plurality of elongate elevations 8 projecting from the surface and elongated depressions 9 deepening the surface in a parallel arrangement.
  • the elevations 8 and depressions 9 each extend along a direction which is indicated in FIG. 7 by the arrow R1 for the outer pane 2 and by the arrow R3 for the inner pane 3.
  • the elevations 8 and depressions 9 are arranged alternately transversely to the directions R1 and R3, ie along the directions R2 and R4.
  • the elevations 8 and depressions 9 are wave-shaped. As illustrated in FIG. 7, in the embodiment of the composite pane 1 according to the invention shown in FIG.
  • thermoplastic intermediate layer 4 and the outer pane 2 and the inner pane 3 are arranged such that the elevations 10 and depressions 11 of the thermoplastic intermediate layer 4, the run along a direction R5 and are arranged alternately along the direction R6, rotated by 45 ° to the direction R1 and R3 and thus rotated by 45 ° to the elevations 8 and depressions 9 of the outer pane 2 and the inner pane 3.
  • FIG. 8 shows a further exploded view of an embodiment of a composite pane 1 according to the invention.
  • This embodiment differs from that shown in FIG. 7 only in that the inner pane 3 is designed as a flat glass with a constant thickness 7 produced in the float process.
  • This has float lines, i.e. Elevations 19 and depressions 20 extending along an eighth direction R8 and transverse to the eighth direction R8, i.e. are arranged alternately in a ninth direction R9.
  • the elevations 19 and depressions 20 are wave-shaped.
  • thermoplastic intermediate layer 4 and the outer pane 2 and the inner pane 3 are arranged such that the elevations 10 and depressions 11 of the thermoplastic intermediate layer 4, the run along a direction R5 and are arranged alternately along the direction R6, rotated by 45 ° to the directions R1 and R8 and thus rotated by 45 ° to the elevations 8 and depressions 9 of the outer pane 2 and to the elevations 19 and depressions 20 of the inner pane 3 are arranged.
  • the projection arrangement 16 comprises a composite pane 1, in particular the windshield of a passenger car.
  • the composite pane 1 corresponds to the composite pane 1 shown in FIG. 6.
  • the projection arrangement 16 also comprises a projector 17, which is directed to an area B of the composite pane 1.
  • area B which is usually referred to as the HUD area
  • the projector 17 can generate images which are perceived by a viewer 18 (vehicle driver) as virtual images on the side of the composite pane 1 facing away from him when his eyes are open are located within the so-called Eyebox E. 1 to 9, the composite pane 1 is shown as a flat for simplification.
  • the composite pane 1 is a windshield, it is preferably bent in one or more directions in space, as is customary for motor vehicle panes, with typical radii of curvature in the range from approximately 10 cm to approximately 40 m.
  • FIG. 10 shows a flow diagram of an embodiment of the method according to the invention for producing a composite pane 1 according to the invention.
  • the method comprises providing an outer pane 2 with an upper edge 02 of a lower edge U2 and two side edges S2 and an inner pane 3 with an upper edge 03 of a lower edge U3 and two side edges S3, the outer pane 2 having a wedge-shaped cross section with the largest linear Thickness increase along a second direction R2 of the shortest connecting line between the lower edge U2 and the upper edge 02 and / or the inner pane 3 has a wedge-shaped cross section with the greatest linear thickness increase along a fourth direction R4 of the shortest connecting line between the lower edge U3 and the upper edge 03;
  • the method comprises providing a thermoplastic intermediate layer with a wedge-shaped cross-section as roll goods 15.
  • the method comprises cutting out a thermoplastic intermediate layer 4 with an upper edge 04 and a lower edge U4 and two side edges S4, i. H. in disc form, from the thermoplastic intermediate layer with a wedge-shaped cross section as rolled goods 15 such that the thermoplastic intermediate layer 4 has a wedge-shaped cross section with the greatest linear increase in thickness along a sixth direction R6, the sixth direction R6 increasing by an angle a different from 0 ° a seventh direction R7 of the shortest connecting line between the lower edge U4 and the upper edge 04 is rotated.
  • thermoplastic intermediate layer 4 flat between the outer pane 2 and the inner pane 3.
  • the method comprises connecting the outer pane 2, the thermoplastic intermediate layer 4 and the inner pane 3 by lamination.
  • thermoplastic intermediate layer 13, 13 'surface of the thermoplastic intermediate layer
  • thermoplastic intermediate layer as rolls

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Abstract

La présente invention concerne une vitre stratifiée (1) destinée à un affichage tête haute (HUD) comprenant un bord de vitre supérieur (O), un bord de vitre inférieur (U) et deux bords de vitre latéraux (S), comportant au moins une vitre externe (2) comprenant une arête supérieure (O2), une arête inférieure (U2) et deux arêtes latérales (S2), une vitre interne (3) comprenant une arête supérieure (O3), une arête inférieure (U3) et deux arêtes latérales (S3), et une couche intermédiaire thermoplastique (4) agencée entre la vitre externe (2) et la vitre interne (3) et comprenant une arête supérieure (O4), une arête inférieure (U4) et deux arêtes latérales (S4). La vitre externe (2) présente une section transversale cunéiforme comprenant l'augmentation d'épaisseur linéaire la plus élevée le long d'une deuxième direction R2 de la ligne de liaison la plus courte entre l'arête inférieure (U2) et l'arête supérieure (O2), et/ou la vitre interne (3) présente une section transversale cunéiforme comprenant l'augmentation d'épaisseur linéaire la plus élevée le long d'une quatrième direction R4 de la ligne de liaison la plus courte entre l'arête inférieure (U3) et l'arête supérieure (O3). La couche intermédiaire thermoplastique (4) présente une section transversale cunéiforme comprenant l'augmentation d'épaisseur linéaire la plus élevée le long d'une sixième direction R6, la sixième direction R6 étant mise en rotation d'un angle α différent de 0° vers une septième direction R7 de la ligne de liaison la plus courte entre l'arête inférieure (U4) et l'arête supérieure (O4).
PCT/EP2019/079136 2018-11-05 2019-10-25 Vitre stratifiée destinée à un affichage tête haute WO2020094421A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021254910A1 (fr) 2020-06-16 2021-12-23 Saint-Gobain Glass France Vitre composite

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