WO2025190895A1 - Vitre composite à gradient noir continu et protection contre les uv améliorée - Google Patents

Vitre composite à gradient noir continu et protection contre les uv améliorée

Info

Publication number
WO2025190895A1
WO2025190895A1 PCT/EP2025/056527 EP2025056527W WO2025190895A1 WO 2025190895 A1 WO2025190895 A1 WO 2025190895A1 EP 2025056527 W EP2025056527 W EP 2025056527W WO 2025190895 A1 WO2025190895 A1 WO 2025190895A1
Authority
WO
WIPO (PCT)
Prior art keywords
pane
film
opaque
composite pane
opaque film
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/EP2025/056527
Other languages
German (de)
English (en)
Inventor
Stephan GIER
Marcel Klein
Andrea WILLMS
Mathilde GUETTE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Sekurit France SAS
Original Assignee
Saint Gobain Sekurit France SAS
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 Sekurit France SAS filed Critical Saint Gobain Sekurit France SAS
Publication of WO2025190895A1 publication Critical patent/WO2025190895A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B32B17/10009—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
    • B32B1/00—Layered products having a non-planar shape
    • 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
    • B32B17/10247—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons
    • B32B17/10256—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques
    • B32B17/10266—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques on glass pane
    • 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
    • B32B17/10293—Edge features, e.g. inserts or holes
    • 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
    • B32B17/10339—Specific parts of the laminated safety glass or glazing being colored or tinted
    • B32B17/10348—Specific parts of the laminated safety glass or glazing being colored or tinted comprising an obscuration band
    • 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
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10889—Making laminated safety glass or glazing; Apparatus therefor shaping the sheets, e.g. by using a mould
    • 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
    • B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
    • B32B17/10935—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin as a preformed layer, e.g. formed by extrusion
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/02—Windows; Windscreens; Accessories therefor arranged at the vehicle front, e.g. structure of the glazing, mounting of the 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/102—Oxide or hydroxide
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/107—Ceramic
    • B32B2264/108—Carbon, e.g. graphite particles
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4023—Coloured on the layer surface, e.g. ink
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/41—Opaque
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/737—Dimensions, e.g. volume or area
    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—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
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

Definitions

  • the invention relates to a composite pane with a continuous black transition and improved UV protection.
  • Laminated panes are particularly common in the automotive sector as so-called laminated safety glass, particularly as windshields, but increasingly also as roof windows, side windows, or rear windows.
  • a laminated pane has an outer pane and an inner pane that are bonded together by a thermoplastic intermediate layer.
  • the intermediate layer is typically made of at least one bonding film, usually a PVB film.
  • Laminated panes in the automotive sector often have a peripheral masking area that is opaque and surrounds a transparent central see-through area.
  • the opaque masking area primarily serves to protect the adhesive used to bond the laminated pane to the vehicle body from UV radiation. If the laminated pane is equipped with electrical functions (e.g., a heating function), the electrical connections required for this can also be concealed in the masking area.
  • the masking area is typically formed by a black masking print on the surface of the outer pane facing the intermediate layer.
  • the opaque masking area is formed by an opaque, typically black masking print, which is usually applied at least to the interior surface of the outer pane.
  • This masking print typically consists of a screen-printed and subsequently fired enamel containing glass frits and colorants (especially pigments).
  • WO 2014/174308 A1 discloses a composite pane having a darkening band in the form of a masking print.
  • the darkening band extends in the peripheral area (i.e., in the peripheral outer edge area) of the pane and is made of an opaque ceramic ink, which is applied to the pane is applied.
  • the masking print conceals in particular the top view of any adhesive bead or sections of a frame, such as the body of a vehicle, when the laminated pane is installed in a vehicle or in building glazing.
  • the masking print conceals or conceals coating-free sections or coating-free edge areas, in particular the solar protection coating.
  • the ceramic ink is fired onto the surface at high temperatures (usually between 450°C and 700°C, for example when bending the glass pane) and forms a glass-like coating (or enamel).
  • high temperatures usually between 450°C and 700°C, for example when bending the glass pane
  • enamel a glass-like coating
  • a dotted pattern with increasingly larger distances between the enamel dots is often provided.
  • Firing the ceramic ink at higher temperatures can also lead to optical distortions and undesirable stresses in the glass in peripheral areas and in the area of sensor windows, particularly in the patterned transition area between the cover print and the transparent see-through area.
  • WO 2022/268691 A1 describes providing a partially opaque printed functional film between two connecting films instead of the usual cover print.
  • the print is also semi-transparent, at least in some sections, for example, as a dot matrix, perforated matrix, striped matrix, or checkered matrix.
  • the print can also have a gradient, for example, from an opaque cover to a semi-transparent cover.
  • the present invention is based on the object of providing an improved laminated pane with a gradually tapered darkening strip.
  • a further object of the invention is to provide a cost-effective, versatile manufacturing process.
  • the composite pane according to the invention comprises an outer pane and an inner pane which are connected to one another via at least one thermoplastic intermediate layer, the composite pane comprising an opaque masking area, a transparent see-through area and an intermediate layer arranged therebetween. transition region.
  • the composite pane has, at least in the transition region, an opaque film or an opaque film stack with decreasing thickness between the outer pane and the inner pane.
  • the composite pane according to the invention comprises an outer pane and an inner pane that are bonded together via a thermoplastic intermediate layer.
  • the composite pane is intended to separate the interior from the exterior in a window opening (in particular a window opening in a vehicle, but alternatively also a window opening in a building or room).
  • the term "inner pane” refers to the pane of the composite pane facing the interior.
  • the term “outer pane” refers to the pane of the composite pane facing the exterior.
  • the composite pane is preferably a vehicle pane, for example a window pane of a motor vehicle, rail vehicle, ship, or aircraft. It is particularly preferably the windshield, side window, rear window, or roof window of a passenger car or truck, most preferably the windshield.
  • the outer pane and the inner pane each have an outer and an inner-space surface (main surface), and a circumferential side edge surface extending between them.
  • the "outer surface” refers to the main surface intended to face the outside environment in the installed position.
  • the "interior surface” refers to the main surface intended to face the interior in the installed position.
  • the interior-space surface of the outer pane and the outer surface of the inner pane face each other and are connected by the thermoplastic intermediate layer.
  • the outer and inner panes are preferably made of glass, particularly soda-lime glass, which is common for window panes.
  • the panes can also be made of other types of glass (e.g., borosilicate glass, quartz glass, aluminosilicate glass) or transparent plastics (e.g., polymethyl methacrylate or polycarbonate).
  • the thickness of the panes can vary widely. Preferably, panes with a thickness in the range of 0.8 mm are used. to 5 mm, preferably from 1.4 mm to 2.5 mm, for example with the standard thicknesses of 1.6 mm or 2.1 mm. However, it is also possible for the outer pane and/or the inner pane to have a thickness of 0.55 mm or 0.7 mm.
  • the outer pane and the inner pane can be clear and colorless, but can also be tinted or colored, independently of each other.
  • the total transmittance through the laminated glass is greater than 70% in a preferred design.
  • total transmittance refers to the method for testing the light transmittance of motor vehicle windows specified in ECE-R 43, Annex 3, Section 9.1.
  • the outer pane and the inner pane can be independently non-tempered, partially tempered, or tempered. If at least one of the panes is to be tempered, this can be thermally or chemically tempered.
  • the outer pane and the inner pane are curved panes.
  • the outer pane and/or the inner pane may have anti-reflective coatings, non-stick coatings, anti-scratch coatings, photocatalytic coatings, electrically heatable coatings, solar control coatings and/or low-E coatings.
  • 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 engine 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 is understood that the height of the first thermoplastic intermediate layer, the second thermoplastic intermediate layer and the functional film is therefore preferably between 0.8 m and 1.40 m, particularly preferably between 0.9 m and 1.25 m.
  • the inner thermoplastic intermediate layer or layer sequence is transparent according to the invention. It preferably has a single inner connecting layer, but can also comprise several inner connecting layers arranged flat on top of one another. Each inner connecting layer (or the individual inner connecting layer) is preferably formed by a single transparent thermoplastic A connecting film is used. Instead of a film, a polymer coating can also be used on the inner pane and/or the functional film, especially if the thermoplastic layer in question is to be very thin.
  • thermoplastic intermediate layer or layer sequence is preferably based on polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), or polyurethane (PU), particularly preferably based on PVB.
  • PVB polyvinyl butyral
  • EVA ethylene-vinyl acetate
  • PU polyurethane
  • the thickness of each thermoplastic film is preferably between 0.03 mm and 1 mm.
  • films, in particular PVB films, with standard thicknesses of 0.38 mm or 0.76 mm can be used.
  • the composite pane according to the invention can comprise one or more functional films arranged between the outer pane and the inner pane.
  • the intermediate layer has a multi-layer structure. It comprises a functional film with, for example, a layer based on polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the functional film is arranged between an outer thermoplastic layer or layer sequence and an inner thermoplastic layer or layer sequence. It itself typically has no adhesive properties with respect to the outer pane and inner pane.
  • the connection of the panes to form the composite pane is ensured by said thermoplastic layers or layer sequences, which have adhesive properties with respect to the outer pane and inner pane.
  • functional films are commonly used that comprise a PET carrier film and an electrically conductive coating applied thereto, typically containing at least one silver layer.
  • Such functional films provide the composite pane with an IR-reflective effect, thus reducing heat input into the vehicle.
  • they can also serve as reflective surfaces, for example, to reflect the radiation from a projector directed at them, thereby enabling display images to be created for the driver.
  • Composite panes with PET-based functional films are known, for example, from US6280847B1 and DE19534420A1.
  • purely dielectric functional films are also available, which contain a plurality of polymer layers. , with layers with higher and lower refractive indices arranged alternately.
  • at least some of the layers are generally based on PET. Reflective properties can also be achieved through interference effects with such a functional film, for example, against IR radiation or visible radiation from a projector.
  • a composite pane with such a functional film is known, for example, from WO03099553A1.
  • the laminated pane according to the invention has an opaque masking area and a transparent see-through area.
  • a masking area refers to an area of the laminated pane through which a view is not possible.
  • the light transmittance of the masking area is preferably essentially 0%.
  • a see-through area refers to an area of the laminated pane that allows a view through the glass pane and therefore has a certain degree of transparency or at least translucency.
  • the light transmittance of the see-through area is preferably at least 10%, particularly preferably at least 20%, and very particularly preferably at least 50%.
  • the light transmittance is very particularly preferably at least 70%, especially when the laminated pane is used as a vehicle windshield, for which a total transmittance must be greater than 70% (determined by the method for testing the light transmittance of motor vehicle windows specified in ECE-R 43, Annex 3, Section 9.1).
  • the masking area surrounds the see-through area in a frame-like manner.
  • the masking area is thus arranged circumferentially around the see-through area.
  • the masking area forms at least a portion of the edge of the laminated pane. This means that the masking area borders at least a portion of the side edge of the laminated pane. Often, the masking area forms the entire peripheral edge of the laminated pane.
  • the masking area can be conventionally formed by a black enamel masking print on one side of the outer pane or the inner pane or on one side of both panes.
  • the masking region can also be formed by an opaque connecting layer.
  • the connecting layer can be composed of two different connecting films, namely a transparent connecting film and an opaque connecting film.
  • the opaque connecting film contains colorants (pigments or dyes) in a concentration sufficient to ensure opacity.
  • the transparent connecting film and the opaque connecting film are arranged next to one another (relative to the viewing direction through the composite pane) such that they are arranged in one plane of the composite pane, with the opaque connecting film being arranged in and forming the said opaque region, and the transparent connecting film being arranged in and forming the said transparent region.
  • the connecting layer has only the opaque connecting film in the opaque region and no transparent connecting film.
  • the opaque masking region of the connecting layer is formed exclusively by the opaque connecting film
  • the transparent region of the connecting layer is formed exclusively by the transparent connecting film.
  • the two films can be joined flush at their side edges so that they are arranged in one plane and together form a single layer.
  • the transparent connecting film forms the transparent area of the connecting layer and is arranged in the see-through area of the laminated pane.
  • the opaque connecting film forms the opaque masking area of the laminated pane.
  • the opaque connecting film of the connecting layer is the opaque element that causes an area of the laminated pane (namely the masking area) to be opaque and not allow any visibility.
  • the opaque connecting film is therefore arranged in the masking area of the laminated pane and prevents visibility through it, so that it becomes the opaque masking area.
  • the said at least one bonding layer may be the only thermoplastic layer with an opaque region.
  • thermoplastic layers with opaque regions which are either in direct contact with each other or separated by at least one transparent bonding film, although this is not preferred because it makes the construction and manufacture of the composite pane more complex. Areas of different layers can be arranged in overlap so that together they form a masking area.
  • the masking area is formed by the opaque connecting film of the connecting layer, while the remaining part of the masking area is formed by another opaque element, in particular a cover print (preferably on the interior-side surface of the outer pane).
  • a transition region is arranged between the masking region and the see-through region of the composite pane, which transition region comprises an opaque film or an opaque film stack with decreasing thickness.
  • the opaque film according to the invention is therefore designed with the lowest transmission at its edge with the greatest thickness.
  • the opaque film preferably has a transmission T ⁇ 0.2 and in particular T ⁇ 0.1.
  • the opaque film according to the invention preferably comprises black (carbon black) pigments.
  • the decreasing thickness of the cross-section of the opaque film or opaque film stack in the direction from the masking area to the see-through area gradually increases the transmittance of visible light.
  • the transition area between the masking area and the see-through area designed with a continuous gray gradient has a higher visual quality and is less disturbing for the driver than an abrupt transition or a transition with a pattern. The result is a smoother transition appearance, which is less strenuous for the driver and is perceived as less tiring overall.
  • UV protection is one of the central functions of the masking area and thus also of at least the parts of the transition area close to the masking area.
  • the opaque film has a wedge-shaped cross-section.
  • the thickness of the opaque film can thus preferably decrease continuously toward the see-through area.
  • the wedge shape of the opaque film differs from a possible wedge shape of a connecting film, such as is used in particular in composite panes for head-up displays (HUDs), since it does not serve for optical correction, but only to form a gradual, in particular continuous, transition from the black masking area to the see-through area. Therefore, the wedge angles and also the length dimensions of the opaque film or the opaque film stack are clearly distinguishable from those of a conventional wedge-shaped connecting layer.
  • the wedge shape of the opaque film allows for a continuous, smooth and visually high-quality transition from the black masking area to the transparent see-through area while simultaneously providing good UV protection.
  • the composite pane comprises an opaque film stack with a decreasing cross-sectional thickness toward the see-through area.
  • the opaque film stack is preferably formed from a number of opaque films of uniform thickness, such that the decreasing thickness of the film stack is gradually created by increasing lengths of the films arranged one above the other in the stack toward the see-through area.
  • Such a stacked arrangement of films of different lengths also creates a nearly continuous gradient, for example, from black to transparent, which provides a visually high-quality and smooth appearance of the transition area.
  • UV protection is significantly improved compared to printed black gradients.
  • the opaque film or films of the film stack are each a consistently and uniformly pigmented film.
  • the pigments are preferably incorporated into the base polymer during film production.
  • the opaque film or films of the film stack are each a film based on polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA) or polyurethane (PU), and/or copolymers or mixtures thereof.
  • PVB polyvinyl butyral
  • EVA ethylene-vinyl acetate
  • PU polyurethane
  • the opaque film like the thermoplastic intermediate layer, exhibits adhesive properties to the outer and inner panes.
  • the opaque polymeric film and the thermoplastic intermediate layer are made of polyvinyl butyral. This achieves the best results and avoids material incompatibilities.
  • the composite pane comprises an outer pane and an inner pane, which are bonded together via a single thermoplastic intermediate layer.
  • the opaque polymeric film is arranged between the inner pane and the thermoplastic intermediate layer or between the outer pane and the thermoplastic intermediate layer.
  • the opaque film or films of the film stack are each a film based on polyethylene terephthalate (PET), polyethylene (PE), polyamide (PA), polymethyl methacrylate (PMMA), triacetylcellulose (TAG) and/or polycarbonate and/or copolymers or mixtures thereof, in particular on Polyethylene terephthalate (PET), polyamide (PA) and/or cellulose triacetate (TAC).
  • PET polyethylene terephthalate
  • PA polyethylene
  • PMMA polymethyl methacrylate
  • TAG triacetylcellulose
  • PET Polyethylene terephthalate
  • PA polyamide
  • TAC cellulose triacetate
  • the opaque film unlike the thermoplastic intermediate layer, has no adhesive properties with respect to the outer and inner panes. Therefore, in this case, it is preferably enclosed by the thermoplastic intermediate layer or by several thermoplastic intermediate layers.
  • the composite pane has at least one sensor window for an optical sensor and the transition region is arranged in a region surrounding the at least one sensor window.
  • the continuous gray gradient achievable by the arrangement according to the invention with high-quality, smooth optics and simultaneously improved UV protection is a valuable advantage.
  • the transition region is arranged in an edge region surrounding the composite pane.
  • the opaque film or the films of the film stack each contain color pigments or dyes, in particular selected from the group consisting of carbon black, iron oxide pigments and mixed-phase oxide pigments.
  • the opaque film or the film stack is produced by means of 3D printing from pigmented base materials of a polymer, in particular from pigmented filaments of polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA) or polyurethane (PU), and/or copolymers or mixtures thereof, or from polyethylene terephthalate (PET), polyethylene (PE), polyamide (PA), polymethyl methacrylate (PMMA), and/or copolymers or mixtures thereof.
  • PVB polyvinyl butyral
  • EVA ethylene-vinyl acetate
  • PU polyurethane
  • PET polyethylene terephthalate
  • PE polyethylene
  • PA polyamide
  • PMMA polymethyl methacrylate
  • 3D printing represents a fast and cost-effective manufacturing option, allowing rapid and efficient response to changing dimensions and design changes.
  • the pigmented base materials preferably in the form of filaments, are commercially available.
  • the necessary data regarding dimensions, wedge angle, desired length, etc. can be transferred to the printer, and the 3D printing can be carried out.
  • the resulting opaque films are then inserted into the subsequent manufacturing process, for example, at a predetermined location on the thermoplastic intermediate layer or into a section of the thermoplastic intermediate layer.
  • the resulting assembly is subjected to the usual lamination process.
  • the opaque film or the opaque film stack is embedded in the thermoplastic intermediate layer.
  • the opaque film or the opaque film stack in the composite pane is completely enclosed by the thermoplastic polymer of the thermoplastic intermediate layer.
  • This can be achieved, for example, by positioning the opaque film or the opaque film stack between at least two thermoplastic polymer films at a suitable and intended location according to the invention during the manufacture of the composite pane and then fusing the polymer films together under the influence of heat, for example during lamination, and by flowing around and, as it were, enclosing the opaque film or the opaque film stack through the thermoplastic material of the layers.
  • the opaque film is thus securely held in the appropriate position in the transition area between the masking area and the see-through area of the
  • the laminated pane is secured, and the opaque film is protected from environmental influences.
  • This design is particularly suitable for opaque films made of a material that is non-adhesive to the panes, such as PET.
  • the opaque film or film stack is inserted into a section of the thermoplastic intermediate layer.
  • thermoplastic intermediate layer is an opaque film or opaque film stack, wherein the film(s) as well as the thermoplastic intermediate layer are formed from a material that is adhesive to the panes.
  • the invention also relates to a method for producing a composite pane according to the invention, wherein at least:
  • Steps (a) and (b) of the process according to the invention can also be carried out in reverse order or simultaneously.
  • the outer pane and the inner pane are preferably subjected to a bending process before lamination.
  • the outer pane and the inner pane are bent congruently together (i.e. simultaneously and using the same tool), as this ensures the shape of the panes for the subsequent lamination are optimally coordinated.
  • Typical temperatures for glass bending processes are, for example, 500°C to 700°C.
  • the lamination of the stacking sequence can be carried out using common lamination processes. For example, so-called autoclave processes can be carried out at an increased pressure of around 10 bar to 15 bar and temperatures of 130°C to 145°C for around 2 hours. Alternatively, autoclave-free processes are also possible.
  • Well-known vacuum bag or vacuum ring processes operate at around 200 mbar and 80°C to 110°C.
  • the stacking sequence can also be pressed into a composite pane in a calender between at least one pair of rollers.
  • Systems of this type are known for the production of panes and normally have at least one heating tunnel upstream of a pressing unit.
  • the temperature during the pressing process is, for example, between 40°C and 150°C.
  • Combinations of calender and autoclave processes have proven particularly successful in practice.
  • vacuum laminators can be used.
  • These consist of one or more heatable and evacuatable chambers in which the first pane and the second pane are laminated within, for example, about 60 minutes at reduced pressures of 0.01 mbar to 800 mbar and temperatures of 80 °C to 170 °C.
  • the invention also encompasses the use of a composite pane according to the invention in buildings, for example in the access or window area, or in means of transport for traffic on land, in the air or on water, preferably as a vehicle pane, preferably as a windscreen, rear window, side window or roof window of a motor vehicle, in particular as a windscreen of a motor vehicle.
  • Fig. 1 is a plan view of a composite pane according to the invention
  • Fig. 2 shows a cross section along X-X’ through a composite pane according to the invention in a simple embodiment of the invention
  • Fig. 3 shows a cross section along X-X’ through another inventive
  • Fig. 4 shows a cross section along X-X’ through a further inventive
  • Fig. 5a-5g various cross sections along X-X' of a film or a film stack of various embodiments of the composite pane according to the invention.
  • Figure 1 shows a perspective top view of a composite pane according to the invention with an opaque masking region M, a transparent see-through region D and a transition region G located therebetween.
  • the composite pane is, for example, the windshield of a motor vehicle.
  • the masking region M is arranged in a peripheral edge region of the composite pane and surrounds the see-through region D.
  • Such masking regions are common in vehicle windows - they serve to protect the adhesive used to bond the composite pane to the vehicle body from UV radiation.
  • any electrical connections or the side edge of a embedded opaque film in the masking area M is designed with a constantly decreasing gray gradient.
  • FIG. 2 shows a simple embodiment of the invention in a highly schematic cross-sectional view of section XX'.
  • a composite pane 100 has an outer pane 1 and an inner pane 2, which are connected by a thermoplastic intermediate layer 3.
  • the thermoplastic intermediate layer 3 is essentially formed by a PVB film.
  • a masking region M is formed by a mask arranged on the surface facing the inner pane 2.
  • This mask can be formed, for example, by a conventional fired black enamel. It can equally be formed by a black-colored or black-printed film, for example a PVB film.
  • an opaque film 4 is arranged, which, according to the invention, has a thickness that decreases—here continuously—in the direction of the see-through region D.
  • the opaque film 4 has a uniform, continuous pigmentation, preferably with black pigments such as carbon black pigments.
  • the opaque film 4 is wedge-shaped and arranged with its greatest thickness slightly overlapping the masking area M. The edges of the opaque film 4 are advantageously concealed by the provided masking print in the masking area so that they are not visible.
  • the opaque film 4 Due to the decreasing thickness of the opaque film 4 in the direction of the see-through area D, a continuously decreasing pigmentation of the transition area G is achieved, which forms a calm, gradual gray gradient for the viewer towards the see-through area D.
  • the opaque film 4 has a cross-sectional thickness of between 0.076 mm and 0.025 mm, preferably between 0.050 mm and 0.038 mm, at its edge with the greatest thickness. Its cross-sectional length and thus approximately the extent of the transition area G depends on the desired design and is, for example, between 1.0 and 10.0 cm, preferably between 2.0 and 5.0 cm. Due to the continuous pigmentation of the opaque film 4, a higher pigment concentration is achieved, particularly in the edge area from the transition area G to the Masking area M is provided, which provides improved UV protection for the adhesive areas underneath.
  • an arrangement as shown in Figure 2 can be achieved, for example, by simply inserting the wedge-shaped film 4 onto or into a section of the thermoplastic intermediate layer 3 before joining and pressing it with the two panes 1 and 2.
  • the thermoplastic material of the intermediate layer 3 partially or completely encloses the inserted opaque film 4, as shown here.
  • the opaque film 4 can be based on a material that is not adhesive to the panes, such as PET. However, it can equally well be based on a material that is adhesive to the panes, such as PVB.
  • Figure 3 shows a very similar embodiment of the invention to Figure 2.
  • the present composite pane 100 according to the invention has an opaque film stack 5 with a thickness decreasing in the direction of the see-through region D to form the transition region G.
  • the film stack 5 is formed by stacking thin individual films of different lengths, with the longest film of the film stack being arranged as the bottommost film.
  • the individual films can preferably be based on an adhesive material, so that they automatically form a stable stack, which can be incorporated into a thermoplastic intermediate layer 3 as in the previous embodiment.
  • Figure 4 shows a further embodiment of the composite pane 100 according to the invention with a thermoplastic intermediate layer 3 formed from two thermoplastic films.
  • An opaque film stack 5 is placed flush with the masking region M in the first thermoplastic film of the intermediate layer 3 facing the outer pane 1 to form the transition region G.
  • a wedge-shaped opaque film can also be used.
  • This embodiment is particularly advantageous, for example, for windshields with improved acoustics through the use of a special intermediate layer or for composite panes that also have additional functional films or coatings.
  • the opaque film or the opaque film stack 5 can be fixed to the adhesive surface of the thermoplastic film facing the inner pane 2 and cannot slip when the remaining layers are joined together.
  • the arrangements of a composite pane according to the invention shown schematically in the figures can be used as a vehicle pane in means of transport for traffic on land, in the air or on water, preferably in motor vehicles and in particular as a windshield.
  • Figures 5a to 5g show, by way of example, various shapes of an opaque film 4 or an opaque film stack 5.
  • the opaque film 4 can form a wedge shape as shown in Figure 5a.
  • the wedge shape of the opaque film 4 can have either a straight base line in the installed position or an inclined base line as shown in Figure 5b.
  • Figure 5c shows an opaque film stack 5, wherein the opaque film stack 5 is formed from a number of opaque films 6 of uniform thickness such that the decreasing thickness of the film stack 5 is produced step by step by increasing lengths of the films 6 arranged one above the other to form the stack, in the installed position in the direction of the see-through area D.
  • Figure 5e shows an alternative embodiment of an opaque film stack 5, in which the decreasing thickness is produced by applying individual films of different thicknesses.
  • FIGS 5f and 5g Another preferred variant is shown in Figures 5f and 5g, in which the opaque film 4 or the opaque film stack 5 is directly connected to an opaque film that forms the masking of the masking region M.
  • this can also be formed in one piece.
  • a one-piece variant of Figure 5g can, for example, be easily manufactured by 3D printing, just like the variant of Figure 5f.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une vitre composite (100) comprenant une vitre extérieure (1) et une vitre intérieure (2) qui sont reliées l'une à l'autre par l'intermédiaire d'au moins une couche intermédiaire thermoplastique (3), la vitre composite ayant une région de masquage opaque (M), une région de visualisation transparente (D) et une région de transition (G) disposée entre celles-ci, la vitre composite ayant, au moins dans la région de transition (G), un film opaque (4) ou un empilement de films opaques (5) d'épaisseur décroissante (d) entre la vitre extérieure (1) et la vitre intérieure (2), le film opaque (4) ou l'empilement de films opaques (5) étant orienté de telle sorte que sa portion la plus mince fait face à la région transparente (D). L'invention concerne également son procédé de fabrication et son utilisation notamment comme pare-brise d'un véhicule.
PCT/EP2025/056527 2024-03-15 2025-03-11 Vitre composite à gradient noir continu et protection contre les uv améliorée Pending WO2025190895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP24163737.0 2024-03-15
EP24163737 2024-03-15

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WO2025190895A1 true WO2025190895A1 (fr) 2025-09-18

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534420A1 (de) 1995-09-16 1997-03-20 Flachglas Automotive Gmbh Verfahren zur Herstellung einer von verwerfungsbedingten optischen Störungen freien Verbundsicherheitsglasscheibe
US6280847B1 (en) 1997-05-03 2001-08-28 Pilkington Plc Laminated glazings
WO2003099553A1 (fr) 2002-05-07 2003-12-04 Saint-Gobain Glass France Vitre feuillette avec un film contrecolle
WO2014174308A1 (fr) 2013-04-25 2014-10-30 Pilkington Group Limited Vitrage feuilleté
US11396160B2 (en) 2017-08-25 2022-07-26 Kuraray Europe Gmbh Laminated glass comprising interlayer film layers with a pigmented frame
WO2022268691A1 (fr) 2021-06-25 2022-12-29 Saint-Gobain Glass France Vitrage feuilleté comportant un film fonctionnel à impression opaque

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534420A1 (de) 1995-09-16 1997-03-20 Flachglas Automotive Gmbh Verfahren zur Herstellung einer von verwerfungsbedingten optischen Störungen freien Verbundsicherheitsglasscheibe
US6280847B1 (en) 1997-05-03 2001-08-28 Pilkington Plc Laminated glazings
WO2003099553A1 (fr) 2002-05-07 2003-12-04 Saint-Gobain Glass France Vitre feuillette avec un film contrecolle
WO2014174308A1 (fr) 2013-04-25 2014-10-30 Pilkington Group Limited Vitrage feuilleté
US11396160B2 (en) 2017-08-25 2022-07-26 Kuraray Europe Gmbh Laminated glass comprising interlayer film layers with a pigmented frame
WO2022268691A1 (fr) 2021-06-25 2022-12-29 Saint-Gobain Glass France Vitrage feuilleté comportant un film fonctionnel à impression opaque

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