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
  • 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
  • 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
  • B32B17/10018—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 only one glass sheet
• • 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
  • 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
  • B32B17/10165—Functional features of the laminated safety glass or glazing
  • B32B17/10339—Specific parts of the laminated safety glass or glazing being colored or tinted
  • B32B17/10357—Specific parts of the laminated safety glass or glazing being colored or tinted comprising a tinted intermediate film
• • 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
  • B32B17/10651—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 colorants, e.g. dyes or pigments
  • B32B17/1066—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 colorants, e.g. dyes or pigments imparting a tint in certain regions only, i.e. shade 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
  • B32B17/1055—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
  • 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
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
• • 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
  • B32B2250/00—Layers arrangement
  • B32B2250/03—3 layers
• • 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
  • B32B2250/00—Layers arrangement
  • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• • 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
  • B32B2375/00—Polyureas; Polyurethanes
• • 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
  • B32B2605/006—Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
  • Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
  • Y10T428/24926—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including ceramic, glass, porcelain or quartz layer

Definitions

• the invention relates to glazings comprising patterns limiting the light transmission. More particularly, the invention relates to glazings comprising patterns limiting the light transmission and an optical sensor such as a camera, an infrared camera, a Lidar, a laser pointer ....
• a large part of automotive glazing comprises enamelled patterns intended to hide unsightly elements, including glue joints, electrical connections and especially those related to a possible camera disposed on the glazing, etc.
• these patterns are obtained by applying a composition comprising a glass frit, pigments and a vector in which the frit and the pigments are suspended. The application of these enamel compositions is followed by a high temperature firing which melts the frit and sets the enamel to the support.
• the application of enamelled patterns on the glass is achieved by a screen printing technique.
• the applied composition is dried to remove most of the vector, and fired to fix the constituents on the glass sheet.
• the cooking of the enamel composition can be performed during a forming treatment of the sheet.
• the temperature conditions in which the forming takes place, be it quenching or bending, are such that the melting temperature of the frit is greatly exceeded.
• the presence of the enamelled composition on a glass sheet causes various difficulties in the implementation of these bending / quenching operations, by locally modifying the thermal behavior of the sheet.
• the presence of enamel results in a significant difference in the absorption of the thermal radiation, causing, locally, differences in the kinetics of forming. These differences, if they are not taken into account in the processing conditions, lead to irregularities in forming.
• the numbering of the sheets of glass in the following description refers to the numbering nomenclature conventionally used for glazing.
• face 1 the face of the laminate which is in contact with the environment outside the vehicle
• the terms “external” and “internal” refer to the orientation of the glazing when installed as glazing in a vehicle.
• an optical sensor such as a camera, an infrared camera, a Lidar, or a laser pointer conventionally arranged near the interior rearview mirror
• a distortion of the image picked up by the optical sensor, and in particular the camera is induced by the presence of enamel around the area commonly known as the "camera zone”.
• the optical sensor may be disposed in another area than that near the mirror. Indeed, it could be arranged for example in an area at the periphery of the glazing or in any other area likely to receive such a sensor.
• the invention proposes glazings and in particular laminated glazings comprising a thermoplastic interlayer comprising an area opaque to the radiation of the wavelengths of the visible.
• the invention consists in substituting the serigraphy usually used on at least the face 2 or the face 4 to hide the edge of the glazing, by a thermoplastic interlayer film comprising an area opaque to the visible wavelength radiation and to ultraviolet (UV).
• a thermoplastic interlayer film comprising an area opaque to the visible wavelength radiation and to ultraviolet (UV).
• UV ultraviolet
• the present invention provides a laminated glazing unit and in particular a laminated glazing unit comprising a thermoplastic interlayer comprising a zone that is opaque to visible and ultraviolet (UV) wavelength radiation and an optical sensor, in particular a fixed camera. on the inner face of the laminated glazing.
• a laminated glazing unit and in particular a laminated glazing unit comprising a thermoplastic interlayer comprising a zone that is opaque to visible and ultraviolet (UV) wavelength radiation and an optical sensor, in particular a fixed camera.
• automotive laminated glazings are printed on the entire periphery of the edges of the glazing and in the integration zone of the sensors on face 2 and / or face 4, to form an occultation band, in order to protect the UV radiation the bonding system that ensures the adhesion of elements added to the glazing such as busbars, connectors, heating networks, brackets, etc .. and on the other hand to hide these elements and hide the cameras, other optical detectors such as rain detectors ...
• the purpose of the strip is twofold, on the one hand aesthetics, because from the outside all these elements are not visible, on the other hand, to avoid the damage to the glue induced by exposure to radiation solar.
• the impression used is the screen printing of the enamel.
• the enamel provides the optical qualities required and sufficient masking elements such as those mentioned above.
• the enamel is screen printed on the inside face of the glass sheet intended for the outer position, that is to say in contact with the atmosphere, called face 2, and / or on the outside face of the sheet glass for the inner position, called the face 4, which is in contact with the interior atmosphere, including the passenger compartment of a vehicle.
• the presence of enamel strips on the faces 2 and 4 is not without effect on the behavior of the glass during its bending, because they cause the glass to absorb infrared radiation (IR), and this locally on the periphery of the glazing, while the inner surface of the glass will only absorb weakly, this is even more true for windshields for which the glass sheets are generally clear glasses, this l is even more so when reflective layers are used.
• highly absorbent areas are mixed with highly reflective areas.
• burn line is a local deformation related to these two phenomena and parallel to the black bands enamel, they are all the stronger as the black bands are wide. This is the reason why these bum lines are mainly visible in high and low windshields, that is to say the lower and upper areas of the windshield.
• the lateral black bands are generally thin so as to maximize the field of view.
• the presence of enamel strips impacts not only the process, but also the optical quality of the products and the images captured by possibly a camera disposed on the face 4 of a laminated glazing unit.
• the present invention proposes a solution that significantly reduces or even eliminates the optical distortion of the image picked up by the optical sensor and in particular the camera disposed on the face 4 of the laminated glazing.
• thermoplastic interlayer comprising an area opaque to the radiation of the wavelengths of the visible, is advantageously disposed between the faces 2 and 3 of the laminated glazing during assembly operations comprising a passage in the oven and under pressure (also called lamination).
• the thermoplastic interlayer comprising an area opaque to the radiation of the visible wavelengths, is advantageously applied to the face 2 of the laminated glazing at least in the zone known as the "camera zone", that is to say the area around the optical sensor such as a camera, a Lidar .... It is understood that the very area where the optical sensor is located or more particularly the sensor of the camera or cameras is devoid thermoplastic interlayer comprising an area opaque to radiation visible wavelengths during assembly operations comprising a passage in the oven and under pressure (also called lamination) as for conventional windshields where the enamel replaces the thermoplastic interlayer.
• Opaque zone is defined as the radiation of the wavelengths of the visible, an area whose light transmission is less than 5% and preferably equal to 0% to the incident light.
• This opaque zone unlike enamel, allows both to hide elements as connectors (busbars ...), glue ... as enamel but especially simplifies the process of forming a laminated glazing having elements to be masked from both the outside and the inside of the cabin.
• opaque zone will refer to the area opaque to visible wavelength radiation.
• the appearance of the opaque zone must be strictly homogeneous with regard to a coating whose purpose is primarily aesthetic. For the same reasons, the opaque zone must have very precise contours in spite of the difficulty resulting from the nature of the support.
• thermoplastic interlayer comprising an opaque zone constitutes a characteristic of the invention, which distinguishes it from enamels usually used.
• the required opacity is such that the light transmission is less than 5% and preferably less than 3% and even more preferably equal to 0%.
• the purpose of the invention is therefore to provide a laminated glazing unit comprising a thermoplastic interlayer comprising an area opaque to visible wavelength radiation, making it possible to mask unsightly elements and to improve the quality of the images captured by means of an optical sensor, and in particular, a camera disposed in face 4 of the laminated glazing since the optical distortion in the "camera zone" is significantly reduced or even eliminated.
• thermoplastic interlayer a laminated glazing unit comprising a first and a second glass sheet assembled (laminated) by means of at least one thermoplastic interlayer.
• the laminated glazing unit comprises the at least one thermoplastic interlayer comprising an opaque zone at visible wavelengths.
• said opaque zone extends over the entire periphery of the glass sheet on which it is applied as well as in the "camera zone” or in any zone in which good optical quality is necessary, just as for the enamel layer in conventional glazing. This opaque zone thus replaces the enamel conventionally used.
• the opaque zone may extend over a large portion of the laminated glazing. According to a preferred embodiment of the invention, said opaque zone extends over the entire periphery of the internal face of the outer glass sheet, that is to say, face 2.
• the method of masking the unsightly elements is simplified and can be implemented during the assembly process (rolling) of the laminated glazing.
• thermoplastic interlayer comprising an opaque zone is formed from an opaque frame disposed around the non-opaque zone.
• thermoplastic interlayer in its entirety and size allowing the lamination of the glass sheets together, can be hollowed out of its central portion to form a frame.
• the central part is then replaced by a non-opaque or transparent thermoplastic interlayer.
• the frame is formed of strips of opaque interlayer, for example a PVB or an EVA dyed black in the mass juxtaposed, the strips being arranged around a central part of a thermoplastic interlayer, the pieces will merge together. to form the thermoplastic interlayer which will extend over the entire surface of the glass sheets.
• the at least one thermoplastic interlayer may be of any material known in the art capable of forming a laminate. It can be an ethylene-vinyl acetate, polyurethane, polycarbonate, polyvinyl butyral copolymer, polyvinyl chloride or a copolymer of ethylene and methacrylic acid.
• the thermoplastic interlayer comprising an area opaque to the radiation of the visible lengths is a sheet of polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA). It is generally available in a thickness of between 0.38 and 1.1 mm, but most often 0.76 mm.
• thermoplastic interlayer comprising an opaque zone is obtained by mass staining of the periphery of the interlayer.
• thermoplastic interlayer comprising an opaque zone is obtained by juxtaposition of an opaque colored thermoplastic interlayer frame and a central part formed of a transparent or non-opaque interlayer, the opaque frame and the central portion of the thermoplastic interlayer may be in the same or different thermoplastic material, one being colored and the other not.
• the dimensions of the opaque zone are similar to those usually used for an enamel layer. It is understood that they may be greater or smaller than those of the enamel layer, the aim being that the opaque zone is wide enough to hide the elements glued to the glazing such as busbars, connectors ....
• thermoplastic interlayer comprising an area opaque to the radiation of the lengths of the visible, according to the invention, is disposed substantially on the surface of the glazing.
• thermoplastic interlayer comprising an area opaque to the radiation of the visible lengths is arranged around the camera area thus reducing the optical distortion in this area.
• the laminated glazing further comprises a second thermoplastic interlayer.
• the second thermoplastic interlayer is a polyvinyl butyral (PVB) sheet.
• thermoplastic spacers can be arranged between the interlayer thermoplastic comprising an opaque zone and the second glass sheet.
• the thermoplastic interleaves are chosen from a polyvinyl copolymer of butyral or ethylene-vinyl acetate, or polyurethane, or polycarbonate.
• only the lower and upper peripheral zones of the glazing or only the camera zone are covered by the opaque zone of the thermoplastic interlayer while the lateral zones (right-left) of the laminated glazing are provided with a layer of enamel.
• spacers may be dictated by the need to minimize excessive exposure to UV glazing.
• the choice of inserts limits this exposure considerably. This is particularly the case for the use of PVB interleaves, which by nature are UV-shielded, allowing only a very small proportion of them to pass through. For PVB films 0.38mm thick more than 95% UV is removed. This proportion may exceed 99%.
• Ethylene vinyl acetate (EVA) -based polymers are also provided which contain components which impart a very low UV transmission.
• the at least one thermoplastic interlayer according to the invention comprises a non-opaque zone which is formed from a thermoplastic interlayer which forms a UV screen, also called "UV-cut”.
• At least one of the glass sheets used in the laminated glazing can be colored.
• the glazing may also include colored dividers which contribute to the establishment of the desired optical conditions.
• thermoplastic interleaves can be superimposed so as to obtain a particular color and / or particular optical conditions.
• the non-opaque part of the interlayer comprising an opaque zone is formed by juxtaposition pieces of colored thermoplastic interleaves so as to obtain, for example, a color gradient or particular patterns.
• the invention further relates to a method for manufacturing a laminated glazing as described above.
• the invention also relates to the use of at least one thermoplastic interlayer comprising an area opaque to the radiation of the wavelengths of the visible, to hide unsightly elements between two sheets of glass.
• FIG. 1 shows a schematic plan view of a glazing unit 10 known from the prior art comprising an enamel layer on faces 2 and 4.
• FIG. 2 shows a schematic plan view of a glazing unit 10 according to the invention comprising a thermoplastic interlayer comprising an area opaque to the radiation of the visible wavelengths.
• FIG. 3 shows a schematic plan view of a thermoplastic interlayer comprising an area opaque to visible wavelength radiation, said opaque zone framing a non-opaque zone.
• FIG. 4 shows a schematic plan view of a glazing unit 10 according to the invention comprising an enamel layer comprising dots arranged in face 4.
• FIG. 5 shows a schematic plan view of a glazing unit 10 according to the invention comprising a thermoplastic interlayer comprising an area opaque to the radiation of the wavelengths of the visible which extends in the "camera zone".
• FIG. 6 shows a graph showing the positive effects of the opaque zone on the visible wavelength radiation of the thermoplastic interlayer on the optical distortion of the image captured by a camera in comparison with a conventional glazing unit.
• FIG. 1 shows a laminated glazing unit known from the prior art, in the form of a windshield for automobile 10.
• a strip of concealment 101 and 102 more specifically an enamel layer which has the role of on the one hand to mask and protect the sealing material (not shown) which is used to fix the window in a vehicle (not shown), and on the other hand to hide electrical connections (busbars, etc.) that provide electrical energy to the glazing if necessary.
• the face of the laminate which is in contact with the environment outside the vehicle is known as the face 1 and the surface in contact with the internal medium, that is to say the passenger compartment of the vehicle, is called face 4.
• the faces of the glass sheets are numbered from 1 to 4 in the figures.
• the windshields have curvatures which are usually more accentuated on the edges at the point of attachment to the bodywork for a docking chosen for its "design", the aerodynamics corresponding to a good surface continuity between the contiguous elements.
• burn line is a local deformation related to these two phenomena and parallel to black bands enamel, they are all the stronger as the black bands are wide. This is the reason why these burn lines are mainly visible in high and low bands of windshields.
• the black side bands are always thin (Field of vision to maximize).
• thermoplastic interlayer 20 extends at least in the "camera zone” 51 (or 52 in an integration variant of the optical sensors) so as to improve the quality of the images captured by the camera or cameras arranged opposite the laminated glazing by decreasing the optical distortion in this area.
• the camera, or generally the optical sensor, (not shown) is placed in the slot 53.
• the glass sheets 11 and 12 as illustrated in FIGS. 1 and 6 are soda-lime glasses.
• One or both sheets of glass may be sheets of clear glass of the soda-lime-calcium type of the following composition (by weight): 68-75% SiO2; A12O3 at 0-5%; Na2O 10 - 18%; K2O at 0 - 5%; MgO 0 - 10%; CaO 5 to 15%; SO3 O - 2%.
• the glass may also contain other additives, such as, for example, ripening aids up to 2%.
• the inner glass sheet of the laminated glazing unit may be made of stained glass, the composition of which may comprise one or more of the following colorants: iron oxide, cobalt oxide, selenium, chromium oxide, titanium oxide, manganese oxide, copper oxide, vanadium oxide, nickel oxide. It is understood that the two sheets of glass can be clear glass.
• One or the glass sheets may be tempered glass.
• the glass sheets can be flat or curved.
• Each glass sheet may have a thickness between 0.5 and 25 mm thick, preferably between 1 and 5 mm.
• the total thickness of the automotive glazing may therefore be between 1.5 and 100 mm, preferably between 2 and 50 mm, and more preferably between 2.5 and 20 mm.
• the glazing has a transmission of visible light (measured with illuminant CIE A) greater than 70% and more preferably greater than 75% when the two glass sheets and the thermoplastic interlayer layers are substantially clear.
• the glazing generally has a tint (because either the inner glass sheet of the glazing is body-tinted or one or more plies of the interlayer material is tinted), it preferably has a visible light transmission (measured by the CIE Illuminant A) less than 40%, more preferably less than 30% and preferably less than 25%, and a total energy transmission (Parry Moon, Air Mass 1.5) of less than 30%, more preferably less than 25%. % and preferably less than 20%.
• glass sheets may be of any composition that can be used for laminated glazing and in particular for automotive laminated glazing.
• FIG. 2 shows a laminated glazing unit, more specifically a windshield, according to the invention in which is provided on the face 2 of the glass sheet 11 a thermoplastic interlayer 20 comprising an area opaque to the visible radiation 21, said opaque zone s extending over the entire periphery of a non-opaque zone 22 of the thermoplastic interlayer 20.
• a thermoplastic interlayer 20 comprising an area opaque to the visible radiation 21, said opaque zone s extending over the entire periphery of a non-opaque zone 22 of the thermoplastic interlayer 20.
• thermoplastic interlayer is shown in FIG. 3.
• the face 2 of the outer glass sheet 11 is devoid of a layer of enamel.
• the opaque zone is formed of a black tinted PVB having a light transmission of 0%.
• the non-opaque zone 22 is here represented by a light PVB and preferably a PVB blocking the UVs.
• a PVB is also called PVB UV-cut.
• Figure 2 is also shown an electrically conductive circuit 23 formed of a busbar 24 and connectors 25, disposed at the periphery of the laminated glazing face 3. This conductive circuit is well known to those skilled in the art and its positioning is conventional in this type of glazing. It can however be arranged on another part of the laminated glazing.
• the opaque zone 21 provided on the upper and lower peripheral zones of the laminated glazing (orientation according to the up / down arrangement of the glazing on the automobile as a windshield) must be sufficient dimensions to hide in particular the bonding of the upper lip of the upper seal for receiving the laminated glazing when mounted on the automobile, and also the bonding of the gutter seal disposed at the lower periphery of the glazing.
• thermoplastic interlayer 20 comprising an opaque zone 21, extending over the entire surface of the laminated glazing, said opaque zone extending over the entire periphery of the interlayer thermoplastic 20 and in the camera area.
• the "glitter line" is suppressed, since the same thermoplastic interlayer is used both to opacify the zone to be masked (via the zone opaque to the radiation of the wavelengths of the visible) and to allow the lamination of the two sheets of glass, since the thermoplastic interlayer extends over the entire surface of the laminated glazing.
• only the lower and upper peripheral zones of the laminated glazing are provided with the opaque zone of the interlayer, the lateral zones are provided with serigraphed enamel strips of small width in order to maximize the field of view.
• an enamel layer 102 may be present on the face 4 of the glazing so as to hide the connectors such as busbars and connectors or the adhesive for gluing these elements ... , seen from inside the vehicle.
• FIG 3 shows the at least first thermoplastic interlayer 20 according to a particular embodiment of the invention.
• the opaque zone 21 is on the periphery of the thermoplastic interlayer 20.
• the thermoplastic interlayer 20 is of slightly greater dimension than that of the glass sheets 11 and 16 so that it extends over the entire surface leaves of glass.
• the opaque zone 21 according to this particular embodiment takes the form of a frame made from a colored thermoplastic interlayer whose light transmission is 0%.
• the frame is made from a black PVB surrounding the non-opaque zone 22 which consists of a transparent UV-screening PVB which allows only a very small proportion of these to pass through. For PVB spacers 0.38mm thick more than 95% UV is removed. This proportion may exceed 99%.
• Ethylene vinyl acetate (EVA) -based polymers are also provided which contain components which impart a very low UV transmission. It is understood that any thermoplastic interlayer having these characteristics, namely a transmission less than 5% and preferably equal to 0% can be used to form this opaque zone. The dimensions of the opaque zone are generally equivalent to those usually used for the occultation band. These dimensions will depend in particular on the area to be masked.
• the at least first thermoplastic interlayer as represented by FIG. 2 is formed of a colored-colored PVB frame disposed on the periphery / periphery of a transparent PVB so as to form the thermoplastic interlayer according to the invention .
• this frame may be formed by different strips arranged so as to form said frame, these strips merging during baking so as to form a single piece. However, it can be composed and applied using any other known means.
• the interlayer is then provided on at least the face 2 (P2) of the outer glass sheet. It can of course also be provided on the face 4 (P4).
• the continuous enamel layer 102 may be replaced by an enamel strip having a grid of orifices preferably having a distribution. tight uniform of small orifices commonly called "dots".
• the width of the enamel band having these dots is between 4 and 30 mm.
• This enamel band 102 presenting the dots preferably has an overlap between the dots and the zone opaque to the wavelengths of the visible 21 and whose transmission
• the enamel band having the dots is superimposed with the opaque zone at the lengths of the light, preferably at least 5% and more preferably at 0% of the incident light.
• visible waves 21 and whose light transmission is preferably less than 5% and more preferably 0% of the incident light, the thermoplastic interlayer 20 over a distance of between 0 and 10 mm.
• the luminous flux is preferably less than 5%, and more preferably 0%, of the incident light, makes it possible to use less P4 black bandwidth.
• the presence of the "burn line" (deformation of the white lines at the bottom of the windshields) is greatly diminished.
• the improvement makes it possible to reduce the value from 400 mdpt (millidiopters) to less than 100 mdpt without a low enamel band in face 4 (P4).
• peripheral dashes to the periphery of the face 4 (P4) (which will preferably be gray) and which will serve as a bonding track.
• a primer intended to improve the adhesion of the glue to the glazing or to protect the glue when applying an adhesive to a glue.
• glazing according to the invention to fix it to the vehicle.
• a "primerless" adhesive can be used without masking element and / or protection in face 1, if it is protected between the faces 2 and 3 by a thermoplastic interlayer comprising at its periphery a light transmission area of 0%. In particular, this is all the more true when this peripheral portion consists of a black PVB.
• thermoplastic interlayer the area of which is opaque to the radiation of visible wavelengths. extends in the camera area, on the optical distortion of the image captured by a camera in comparison with a conventional glazing.
• the first batch is a lot of conventional windscreens formed of 2 sheets curved glass covered on the periphery and around the camera zone of a layer of enamel in front 4. These windshields have an enamel pattern such as that conventionally used for the integration of a camera in the area central high glazing.
• the second batch consists of windshields for which the enamel has been replaced by a thermoplastic interlayer composed of a transparent zone and an opaque zone, the zone reproducing the enamel pattern as described above, including the camera area.
• the samples were then analyzed in order to quantify the optical deformation perceived through this camera zone.
• the glazings were measured using an ISRA Labscan device whose filters were adjusted in the following manner: Filter 1/2/0 - Maskage 30/4/4/4.
• the analysis was carried out for an installation angle of 28.5 ° with respect to the horizontal and for at least 3 glazings per batch tested.
• the average distortion values measured in milli-diopters are shown in the table of FIG. 6 which shows that a lower distortion of the image obtained with the glazings according to the invention (the lower the value, the lower the distortion). ) in comparison with conventionally used glazing (enamel in the camera area).
• a laminated glazing unit according to the invention can be mounted in any window of a vehicle.
• a laminated glazing unit according to the invention can be provided with additional functionality, by the inclusion of appropriate elements, such as a hydrophilic or hydrophobic coating on the faces 1 or 4.
• laminated glazing such as used as a windshield or rear window of a motor vehicle have many features such as the interior rear view mirror support, bus bars for bring an electric current, an upper band filtering solar radiation, possibly degraded coloring, a rain detector ...
• thermoplastic interlayer 20 comprising an opaque zone 21 on complex-shaped glazings such as windshields is not necessarily limited to opaque strips concealing the location of the gluing or any other unsightly element.
• the same technique can be used for the placement of any decorative element or identification whether or not it is opaque.
• thermoplastic interlayer comprising an opaque zone is in particular incorporated in assemblies which protect it from the risks of abrasion or chemical attack. This is particularly the case of laminated glazing.
• the thermoplastic interlayer comprising an opaque zone is advantageously arranged between the sheets constituting the glazing, that it comprises two sheets of glass assembled by means of a spacer of the PVB type, or that the glazing is of the type called "bi-layer", consisting of a glass sheet associated with an organic sheet of polyurethane type.
• the thermoplastic interlayer comprising an opaque zone can still be applied to an "inner" face of multiple glazings.
• the opaque area of the thermoplastic interlayer which would be exposed to the risk of mechanical or chemical degradation, can be protected by a protective coating applied either uniformly over the entire glazing or locally on the opaque area.

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• Engineering & Computer Science (AREA)
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• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Joining Of Glass To Other Materials (AREA)
• Laminated Bodies (AREA)

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• 2017
  • 2017-12-20 WO PCT/EP2017/083755 patent/WO2018115090A1/fr unknown
  • 2017-12-20 JP JP2019533478A patent/JP7372148B2/ja active Active
  • 2017-12-20 EA EA201991482A patent/EA038461B1/ru unknown
  • 2017-12-20 EP EP17840556.9A patent/EP3558670A1/de active Pending
  • 2017-12-20 KR KR1020197020679A patent/KR20190098185A/ko not_active IP Right Cessation
  • 2017-12-20 CN CN201780081316.XA patent/CN110114214B/zh active Active
  • 2017-12-20 US US16/470,776 patent/US11097515B2/en active Active

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