EP4504512A1 - Windschutzscheibe mit verbesserter unfallsicherheit und diese umfassendes fahrzeug - Google Patents
Windschutzscheibe mit verbesserter unfallsicherheit und diese umfassendes fahrzeugInfo
- Publication number
- EP4504512A1 EP4504512A1 EP23715832.4A EP23715832A EP4504512A1 EP 4504512 A1 EP4504512 A1 EP 4504512A1 EP 23715832 A EP23715832 A EP 23715832A EP 4504512 A1 EP4504512 A1 EP 4504512A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer film
- windshield
- surface area
- intermediate layer
- pane
- 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
Links
Classifications
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- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- 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
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- 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
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- B32B17/10339—Specific parts of the laminated safety glass or glazing being colored or tinted
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- B32B17/1077—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing polyurethane
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- 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
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- 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
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Definitions
- the invention relates to a windshield with improved accident safety, a method for producing the same and a vehicle comprising a windshield with improved accident safety.
- Composite panes which comprise at least two panes and at least one polymer film glued between the panes, have been used extensively for decades in various technical areas, particularly in building glazing and vehicle construction.
- the selection of the materials used and the dimensioning of the components depend on the requirements of the specific intended use, in particular with regard to the desired mechanical strength of the finished glazing, taking into account the boundary conditions set by the framing and any add-on parts.
- the US 6,708,595 B1 discloses an armored laminated glass pane for motor vehicles, which comprises a stacking sequence of several panes and several adhesive intermediate layers in between.
- the airbag integrated into the steering wheel deploys and protects the driver's head from injury in the event of an impact.
- the deployed airbag has a contact area with the windshield, with the airbag pressing against the windshield from the interior surface of the inner window. This causes the windshield to bend, with the greatest bending tensile stresses occurring on the outside surface of the inner pane and the outside surface of the outer pane.
- windshields should also be made should be made as light as possible, for which reduced glass thicknesses of the panes are generally used.
- the reduced glass thickness is accompanied by lower mechanical strength of the windshield area where the airbag hits the glass. If the glass is thin, the risk of glass breaking in the area of the airbag increases, which leads to the airbag not spreading optimally.
- the airbag requires sufficient counterforce in the area of the windshield to ensure its correct expansion, which is not the case in the event of glass breakage. This problem also exists if the accident itself causes damage to the windshield.
- JP 2008133141 A1 discloses a laminated glazing comprising an intermediate layer with a first area and a second area.
- the first area extends along the lower edge and/or both sides of the glazing, with the elongation stiffness of the intermediate layer being higher in the first area than in the second area.
- the invention is therefore based on the object of providing an improved windshield which enables the airbag to spread correctly even if one or both panes of the windshield break and thus offers greater accident safety.
- the windshield according to the invention comprises at least a first pane and a second pane, which are connected to one another by means of a thermoplastic intermediate layer.
- the first pane has an outside surface I and an inside surface II.
- the second pane has an outside surface III and an inside surface IV.
- the outside surfaces of the panes face the surroundings of the vehicle, while the interior surfaces each designate the surfaces of the panes facing the vehicle interior.
- the interior surface II of the first pane is connected to the outside surface III of the second pane via the thermoplastic intermediate layer, the intermediate layer being at least one first polymer film with a first stiffness and a second polymer film with a second stiffness.
- the windshield comprises at least a first surface area in which the thermoplastic intermediate layer comprises at least a first polymer film.
- the windshield includes a second surface area in which the thermoplastic intermediate layer contains the second polymer film.
- the first surface area does not contain a second polymer film.
- the second stiffness of the second polymer film is higher than the first stiffness of the first polymer film, so that the thermoplastic intermediate layer has improved stiffness in the second surface area.
- the second surface area includes at least the contact surface between the deployed driver's airbag of a motor vehicle and the windshield based on the installed state of the windshield in a motor vehicle.
- the higher rigidity of the second polymer film in the second surface area of the windshield ensures greater mechanical stability even if the window breaks and offers sufficient counterforce to the airbag unfolding against the window.
- the second surface area or the second surface areas take up less than 60% of the total area of the windshield, with the individual areas of the second surface areas being added together in the case of several second surface areas.
- This is advantageous in order to be able to provide a stiffer second polymer film at the required location on the windshield, which improves accident safety and to maintain the advantageous properties of the first polymer film in other areas.
- the second polymer film with increased rigidity therefore has these disadvantages, while the first polymer film shows good tear strength and flowability in the heated state.
- the second polymer film is introduced over the entire surface of the composite pane, a deteriorated composite quality of the windshield is to be expected.
- the first polymer film is used over the entire surface and without an additional second polymer film, the desired improved counterforce cannot be achieved when the airbag is unfolded.
- the first polymer film also ensures not only a secure connection of the panes but also more advantageous acoustic properties.
- the surface area of the windshield in which no second polymer film is attached is referred to as the first surface area.
- the area of the first surface area results from the total area of the windshield minus the area of the second surface area.
- the second polymer film is not attached outside the second surface area.
- the first polymer film is attached at least in the first surface area, but can also extend into the second surface area.
- the second surface area comprises at least the contact surface between the deployed driver's airbag of a motor vehicle and the windshield based on the installed state of the windshield in a motor vehicle. Windshields are manufactured individually for a specific vehicle model. Using this model, the subsequent installation position can be determined even if the windshield is not in the installed state, which means that the contact area of the deployed driver's airbag with the windshield can also be determined using the windshield itself.
- the stiffer second polymer film before the panes break only slightly improves the rigidity of the glass laminate and, in the undamaged state, the rigidity of the glass panes themselves is the main factor in the stiffness of the windshield.
- the rigidity of the glass laminate is greatly reduced, which is also evident from the fact that the windshield sinks significantly as the cracks spread.
- the thermoplastic intermediate layer comprising the second polymer film delaminates and stretches in the area of the glass breakage.
- the second polymer film with higher stiffness has a lower extensibility, i.e. the maximum elongation before the film tears is reduced compared to the first polymer film.
- the stiffer second polymer film the stiffness of the damaged area is significantly higher than standard windshields that only include a first polymer film.
- the windshield according to the invention offers a greater counterforce for optimal spread of the airbag.
- the windshield is intended to separate a vehicle interior from an external environment.
- the windshield is therefore a window pane that is inserted into a window opening in the vehicle body or is intended for this purpose.
- the windshield is embedded in the opening provided in the body between the hood, the body roof and the A-pillars of the vehicle body.
- the edge of the windshield that is closest to the engine area of the vehicle when installed is called the engine edge, while the edge opposite the engine edge is called the roof edge and is oriented adjacent to the vehicle roof.
- the two edges of the windshield that run adjacent to the A-pillars, also known as A-pillars, are called the side edges of the windshield and connect the engine edge and the roof edge together.
- the first pane represents the outer pane of the windshield, which faces the external vehicle environment, while the second pane of the windshield forms the inner pane, which faces the Vehicle interior is oriented. It is understood that the first disk, the second disk and the thermoplastic intermediate layer have substantially the same external dimensions.
- the surface of the respective pane which faces the external environment of the vehicle in the installed position is referred to as the external surface.
- the surface of the respective window which faces the interior of the vehicle in the installed position is referred to as the interior surface.
- the interior surface of the outer pane is connected to the outside surface of the inner pane via the thermoplastic intermediate layer.
- the outside surface of the outer pane is referred to as “Side I”, the inside surface of the outer pane as “Side II”, the outside surface of the inner pane as “Side III” and the inside surface of the inner pane as “Side IV”.
- the windshield according to the invention has at least a second surface area in which the second polymer film is introduced. There can also be several second surface areas. No second polymer film is introduced outside the second surface areas.
- the size of the second surface area can vary, but according to the invention includes at least the contact surface between the deployed driver's airbag of the motor vehicle and the windshield based on the installed state of the windshield in a motor vehicle.
- the second polymer film and the first polymer film together form the thermoplastic intermediate layer.
- the first polymer film and the second polymer film can each have a single-layer or multi-layer structure.
- the first polymer film is designed as a film laminate and/or the second polymer film is designed as a film laminate, for example as a film laminate with three layers.
- the first polymer film and the second polymer film are preferably designed as single-layer films.
- the thermoplastic intermediate layer comprises at least a first polymer film with a first stiffness and a second polymer film with a second stiffness.
- the thermoplastic intermediate layer can also comprise one or more further films. These can be, for example, films that have electrically switchable functions or colored areas.
- the at least one first polymer film and the at least one second polymer film can be attached congruently and/or adjacent to one another in the windshield. Whether a congruent or adjacent version of the first and the second polymer film is preferably determined depending on the size of the second surface area.
- the driver's side of a motor vehicle can be arranged either on the right or left side of the vehicle when viewed from the vehicle cabin.
- the at least one second surface area is arranged on the right and/or left side of the windshield as viewed from the vehicle cabin in the direction of travel.
- at least a second surface area which includes the contact surface between the unfolded driver's airbag and the windshield, lies within the so-called field of vision B of the windshield.
- Windshields have a central field of vision, the optical quality of which is subject to high demands.
- the central field of view must have high light transmission (typically greater than 70%).
- Said central field of vision is in particular the field of vision referred to by those skilled in the art as field of view B, field of vision B or zone B.
- Field of view B and its technical requirements are set out in Regulation No. 43 of the United Nations Economic Commission for Europe (IIN/ECE) (ECE-R43, “Uniform conditions for the approval of safety glazing materials and their installation in vehicles”).
- Field of view B is defined there in Appendix 18.
- the windshield also has a second surface area in the contact area of the front passenger airbag with the windshield.
- This second surface area can optionally be designed separately or continuously with the second surface area, which includes the contact surface between the driver's airbag and the windshield.
- the second surface area protrudes from the engine edge, preferably up to a maximum of 50% of the height of the windshield, the height of the windshield resulting from the distance between the engine edge and the roof edge of the windshield.
- the windshield has only a first surface area and a second surface area, which together cover the entire area of the windshield.
- the windshield has a contiguous first surface area that surrounds a plurality of second surface areas.
- Surface areas can be attached, for example, in the area of the contact surface of the unfolded passenger airbag with the windshield.
- the second surface area or the second surface areas occupy a total of less than 50%, preferably 20% to 40%, of the total area of the windshield.
- the individual surfaces of the second surface areas are added together.
- the above-mentioned preferred surface areas of the second surface area are sufficient to cover the contact surface between the airbag and the windshield.
- the remaining first surface area is sufficiently large to ensure a good connection of the windshield panes. This means improved traffic safety can be achieved while maintaining the mechanical stability of the windshield.
- the second surface area is surrounded by the first surface area, wherein the first surface area comprises at least a first polymer film.
- the second surface area is only locally limited to the areas in which this is necessary for accident safety, and in the surroundings of this surface area and the rest of the windshield, an optimal connection of the panes via the at least one first polymer film is guaranteed.
- the first surface area comprises exactly one first polymer film.
- the thermoplastic intermediate layer in the first surface area consists of a first polymer film, with no further polymer films being attached between the first polymer film and the first pane or between the first polymer film and the second pane.
- the first polymer film has a cutout in the second surface area and at least a second polymer film is inserted into this cutout.
- This is advantageous in order to be able to insert the second polymer film only locally in the areas in which the second polymer film is needed.
- the first polymer film surrounds the second polymer film and, if necessary, other films that can be present in the second surface area, in a pas-partout manner.
- the cutout in the first polymer film is advantageous in order to have the smallest possible thickness deviation between the first surface area and the to achieve a second surface area and to be able to insert the second polymer film as flush as possible.
- the cutout of the first polymer film preferably has a rounded geometry; an elliptical or circular cutout is particularly preferably selected. A rounded geometry is advantageous to avoid incorrect lamination and possible air pockets in corner areas.
- the thermoplastic intermediate layer preferably consists of one or more first polymer films, preferably exactly one first polymer film. This is advantageous in order to simplify production and, if there is a cutout in the second surface area, to ensure simplified insertion of this cutout.
- the thermoplastic intermediate layer can be constructed in a single layer or in multiple layers in the second surface area and includes at least a second polymer film.
- a single-layer structure, in which the thermoplastic intermediate layer in the second surface area consists of a second polymer film, is advantageous in order to enable simplified production and simple folding of the layer stack of the thermoplastic intermediate layer.
- the thicknesses of the first polymer film and the second polymer film can be chosen to be similar or identical, so that stresses in the glass due to local differences in thickness are avoided.
- the thermoplastic intermediate layer in the second surface area consists of a second polymer film and a first polymer film, which are arranged congruently with one another and are inserted into a section of the first polymer film present in the first surface area.
- the thicknesses of the second polymer film and the first polymer film within the second surface area are preferably selected so that their sum has the smallest possible deviation from the thickness of the first polymer film located in the first surface area.
- a layer stack consisting of a first polymer film, a second polymer film and a first polymer film arranged flat one above the other in this order is provided in the second surface area, from which the thermoplastic intermediate layer consists in this area.
- the first polymer films arranged in the second surface area adjacent to the second polymer film improve the connection of the second polymer film located between them to the glass panes.
- the Thickness deviation of the thermoplastic intermediate layer between the first surface area and the second surface area should be as small as possible. Whether there is only a second polymer film in the second surface area or whether it should be provided with an adhesion-improving first polymer film on one or both sides depends on the material selection of the second polymer film and its adhesion to glass panes.
- the thickness of the thermoplastic intermediate layer in the first surface area is selected so that it is less than 10%, preferably less than 5%, particularly preferably less than 2%, of the thickness of the thermoplastic intermediate layer second surface area differs.
- the thickness of the thermoplastic intermediate layer in the first surface area is equal to the thickness of the thermoplastic intermediate layer in the second surface area.
- the first polymer film and the second polymer film each comprise one or more individual layers.
- the thickness of the first polymer film is preferably between 300 pm and 1000 pm, particularly preferably between 350 pm and 850 pm.
- the thickness of the second polymer film is preferably between 25 pm and 850 pm, the selected thickness of the second polymer film depending on whether surface-overlapping first polymer films are present in the second surface area.
- the at least one second surface area takes up less than 60%, preferably less than 50%, of the total area of the windshield and is surrounded by a continuous first surface area.
- a first polymer film is introduced into the first surface area, which has a cutout in the area of the second surface area into which a single second polymer film is inserted.
- the first polymer film and the second polymer film both have a thickness of 300 pm to 850 pm, preferably 700 pm to 800 pm, with the thicknesses of the first polymer film and the second polymer film particularly preferably differing from each other by less than 10%.
- the at least one second area takes up less than 60%, preferably less than 50%, of the total area Windshield and is surrounded by a contiguous first surface area.
- a first polymer film is introduced into the first surface area and has a cutout in the area of the second surface area.
- the section of the first polymer film of the first surface area defines the second surface area.
- a layer stack comprising a second polymer film and a first polymer film is inserted into the second surface area.
- the first polymer film in the first surface area has a thickness of 600 pm to 850 pm
- the first polymer film in the second surface area has a thickness of 300 pm to 825 pm
- the second polymer film in the second surface area has a thickness of 25 pm to 400 pm .
- the total thickness of the thermoplastic intermediate layer in the first surface area differs by less than 10% from the thickness of the thermoplastic intermediate layer in the second surface area, defined by the sum of the thicknesses of the first polymer film and second polymer film introduced there , away.
- the first polymer film has a thickness of 760 pm in the first surface area, while a first polymer film with a thickness of 380 pm and a second polymer film with a thickness of 380 pm are introduced in the second surface area.
- the at least one second surface area takes up less than 60%, preferably less than 50%, of the total area of the windshield and is surrounded by a contiguous first surface area.
- a first polymer film is introduced into the first surface area and has a cutout in the area of the second surface area.
- the section of the first polymer film of the first surface area defines the second surface area.
- a layer stack comprising, in this order, a first polymer film, a second polymer film and a first polymer film is inserted into the second surface area.
- the first polymer film in the first surface area has a thickness of 600 pm to 850 pm, while the first polymer films in the second surface area each have a thickness of 200 pm to 400 pm and the second polymer film in the second surface area has a thickness of 25 pm to 200 pm having.
- the total thickness of the thermoplastic intermediate layer in the first surface area corresponding to the thickness of the first polymer film introduced there, differs by less than 10% from the thickness of the thermoplastic intermediate layer in the second surface area, defined by the sum of the thicknesses of the first polymer films introduced there and the second Polymer film, off.
- the first polymer film has a thickness of 760 pm in the first surface area, while two first polymer films with a thickness of 380 pm each and a second polymer film with a thickness of 50 pm are introduced in the second surface area.
- thicker or thinner polymer films can also be used, and even slight differences in thickness between the thermoplastic intermediate layer in the first surface area and the thermoplastic intermediate layer in the second surface area may be acceptable;
- the above-mentioned thickness ranges and Dieken correspondences are technologically advantageous.
- the at least one first polymer film preferably comprises polyvinyl butyral (PVB), polyurethane (PU), ionomers and/or ethylene vinyl acetate (EVA). These materials have proven to be particularly suitable in terms of securely connecting the panes to one another.
- PVB polyvinyl butyral
- PU polyurethane
- EVA ethylene vinyl acetate
- the at least one second polymer film preferably comprises polyvinyl butyral (PVB), polyethylene terephthalate (PET), polyurethane (PU), ionomers and/or ethylene vinyl acetate (EVA).
- PVB polyvinyl butyral
- PET polyethylene terephthalate
- PU polyurethane
- EVA ethylene vinyl acetate
- the at least one first polymer film is a film with a modulus of elasticity of less than 20 MPa, while the second polymer film is a film with a modulus of elasticity of greater than 100 MPa, in each case measured according to the ASTM D882 standard.
- the first polymer film is a PVB film with an elastic modulus of less than 20 MPa
- the second polymer film is a PVB film or a PET film with an elastic modulus of greater than 100 MPa, each measured according to ASTM D882 .
- polymer films with a different chemical composition can be used both for the first surface area and for the second surface area, provided that they meet the other requirements with regard to transparency and longevity and the above-mentioned relationship between the stiffnesses or elastic moduli of the first and second polymer films is maintained .
- the first pane and the second pane are preferably made of glass, particularly preferably of soda-lime glass, as is common for window panes.
- the panes can also be made from other types of glass, for example quartz glass, borosilicate glass or aluminosilicate glass, or from rigid, clear plastics, for example polycarbonate or polymethyl methacrylate.
- the first pane and the second pane can independently consist of non-tempered, partially tempered or toughened glass. If the first disk and/or the second disk are to have a prestress, this can be a thermal or chemical prestress.
- the first and second discs preferably each have a thickness of 0.8 mm to 2.5 mm, particularly preferably 1.2 mm to 2.2 mm.
- the thickness of the first disk is typically from 1.0 mm to 2.5 mm.
- the thickness of the second disk is preferably between 0.8 mm and 2.1 mm.
- the thickness of the first disk is preferably greater than the thickness of the second disk.
- the first disk can be 2.1 mm thick and the second disk can be 1.1 mm thick, or the first disk can be 1.8 mm thick and the second disk can be 1.4 mm thick, or the first disk can be 1.6 mm thick and the second disk can be 1 , 1 mm thick or the first disc be 1.6 mm and the second disc 0.7 mm thick or the first disc be 1.4 mm and the second disc 1.1 mm thick.
- the first pane, the second pane and the thermoplastic intermediate layer can be clear and colorless, but also tinted or colored.
- the tint of the outer pane, inner pane and the thermoplastic intermediate layer is selected depending on the desired application of the composite pane. For windshields, high transmission in the visible range of the light spectrum is desired and dark tints on the components are avoided.
- the total transmission through the windshield in one embodiment as a windshield of a motor vehicle is greater than 70%, based on light type A.
- the term total transmission refers to the procedure for testing the light transmission of motor vehicle windows specified by ECE-R 43, Appendix 3, ⁇ 9.1.
- the windshield according to the invention is preferably curved in one or more directions of space, as is usual for motor vehicle windows, with typical radii of curvature in the range from approximately 10 cm to approximately 40 m.
- the windshield can also be flat, for example if it is intended as a window for buses, trains or tractors.
- the first pane, the second pane and/or the thermoplastic intermediate layer can have further suitable, known coatings, for example anti-reflective coatings, non-stick coatings, anti-scratch coatings, photocatalytic coatings or sun protection coatings or low-E coatings.
- Automobile glazing in particular windshields, rear windows and roof windows, usually have a circumferential peripheral cover print made of an opaque enamel, which serves in particular to protect the adhesive used to install the window from UV radiation and to optically conceal it.
- at least the first pane used as the outer pane has such a covering pressure, particularly preferably both the first pane and the second pane (inner pane and outer pane) are printed so that visibility is prevented from both sides.
- the opaque cover print is applied, for example, in the form of a screen print, so that this screen print circumscribes the field of view of the pane or forms its outer edge. Any electrical conductors arranged in the edge area of the pane and, in the case of coated panes, any coating-free edge area that may be provided are preferably covered by this cover print and are thus optically concealed.
- the opaque screen print can be applied at any level of the laminated glass pane.
- the invention further comprises a method for producing a windshield according to the invention, which comprises the following method steps: a) providing a first pane or a second pane, b) placing a thermoplastic intermediate layer comprising a first polymer film and a second polymer film on the first pane or the second disc, c) closing the layer stack with the second disc or first disc, d) laminating the layer stack consisting of at least the first disc, thermoplastic intermediate layer and second disc to form the windshield.
- the thermoplastic intermediate layer can be applied in step b) by placing the first polymer film and the second polymer film simultaneously or one after the other.
- the cutting of the first polymer film and the second polymer film takes place before or after placing the first polymer film and the second polymer film in step b), but in any case before step c).
- the first polymer film and/or the second polymer film can also be designed in the form of several films, for example two or more thermoplastic films.
- the features mentioned in the description of the windshield also apply to the process and vice versa. If coatings, such as sun protection coatings or heatable coatings, are to be applied to the surfaces of the first pane and the second pane facing the thermoplastic intermediate layer, the panes are preferably connected to form the laminated glass after the coating has been applied. If the windshield includes coatings that are to be electrically contacted, the electrically conductive layers are electrically contacted via busbars or other suitable electrical conductors before the composite pane is laminated.
- Any existing prints for example opaque cover prints, are preferably applied using a screen printing process.
- connection of the first pane and the second pane via the thermoplastic intermediate layer to the windshield is preferably carried out by lamination under the influence of heat, vacuum and/or pressure. Methods known per se can be used to produce a composite pane. During lamination, the heated, flowable thermoplastic material flows so that a stable composite is created.
- so-called autoclave processes can be carried out at an increased pressure of about 10 bar to 15 bar and temperatures of 130 ° C to 145 ° C for about 2 hours.
- Known vacuum bag or vacuum ring processes work, for example, at around 200 mbar and 80 ° C to 110 ° C.
- the first disk, the thermoplastic intermediate layer and the second disk can also be pressed into a disk in a calender between at least one pair of rollers.
- Systems of this type are known for producing disks and usually have at least one heating tunnel in front of a pressing plant. The temperature during the pressing process is, for example, from 40 °C to 150 °C.
- Combinations of calender and autoclave processes have proven particularly useful in practice.
- vacuum laminators can be used. These consist of one or more heatable and evacuable chambers in which the panes 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 further comprises a motor vehicle comprising at least a body, at least one driver's airbag and a windshield according to the invention, the windshield being inserted into an opening in the body.
- the windshield has an upper edge, a lower edge opposite this and two opposite side edges.
- the top edge is the edge referred to, which is intended to point upwards towards the vehicle roof when installed.
- the top edge is usually referred to as the roof edge or front edge of the roof.
- the lower edge refers to the edge which is intended to point downwards towards the hood of the vehicle when installed.
- the lower edge is commonly referred to as the engine edge.
- the side edges of the windshield face each other and connect the bottom edge to the top edge.
- the side edges of the windshield border the body sections commonly referred to as A-pillars.
- the roof edge can be offset backwards into the roof area.
- the motor vehicle is preferably a passenger car.
- Fig. 1 is a top view of an embodiment of a windshield according to the invention and 2a-2d details of a cross section through the embodiment of a windshield according to the invention shown in FIG. 1.
- FIG. 1 shows the top view of an embodiment of a windshield 10 according to the invention
- FIGS. 2a-d show a cross section through the windshield 10 in the figure
- the windshield 10 shown in Figures 1 and 2a-d comprises a first pane 1 and a second pane 2, which are connected to one another via a thermoplastic intermediate layer 3.
- the first pane 1 has an outside surface I and an inside surface II.
- the second pane has an outside surface III and an inside surface IV.
- the outside surfaces I, III point towards the surroundings when the windshield is installed, while the interior surfaces II, IV are oriented towards the vehicle interior when installed.
- the interior surface II of the first pane 1 is connected to the outside surface III of the second pane via the thermoplastic intermediate layer 3
- the thermoplastic intermediate layer 3 comprises at least a first polymer film 3.1 and a second polymer film 3.2.
- the windshield 10 has a roof edge D, a motor edge M opposite the roof edge and two opposite side edges S, which connect the motor edge M and the roof edge D with each other.
- the second polymer film 3.2 is arranged only in a second surface area B of the windshield 10, which, when the windshield 10 is installed in a motor vehicle, comprises the contact surface between the unfolded vehicle airbag and the windshield 10.
- the remaining surface area of the windshield 10 is referred to as the first surface area A.
- the thermoplastic intermediate layer 3 is formed by the first polymer film 3.1.
- the first pane 1 is, for example, a glass pane made of soda-lime glass with a thickness of 2.1 mm.
- the second pane 2 consists, for example, of soda-lime glass and has a thickness of 1.6 mm.
- the first polymer film 3.1 within the first surface area A consists, for example, of a standard PVB used for such purposes and is 0.76 mm thick.
- the first polymer film 3.1 is a PVB film with a modulus of elasticity of less than 20 MPa, measured according to the ASTM D882 standard.
- the thermoplastic intermediate layer 3 contains at least one second polymer film and can be designed in one or more layers, with Figures 2a-d showing preferred embodiments.
- the detailed structure in the second area B is shown in Figures 2b-d.
- the statements in connection with Figures 1 and 2a apply accordingly.
- the thermoplastic intermediate layer 3 in the second surface area B consists of a single second polymer film 3.2.
- the second polymer film 3.2 is, for example, a 0.76 mm thick ionomer film with higher rigidity, such as is marketed under the trade name SentryGlas®.
- the second polymer film 3.2 is an ionomer film with a modulus of elasticity of greater than 300 MPa, measured according to the ASTM D882 standard.
- a stiffer PVB film which is commercially available under the name Saflex®, DG41, can also be used as the second polymer film.
- the second polymer film 3.2 in this case is a PVB film with a modulus of elasticity of greater than 100 MPa, measured according to the ASTM D882 standard.
- Polymer films available on the market under the trade name trosifol® or under the trade name Evalam® can also be used as a second polymer film.
- the first polymer film 3.1 in the first surface area A and the second polymer film 3.2 in the second surface area B have the same thickness.
- the thermoplastic intermediate layer 3 in the second surface area B consists of a first polymer film 3.1 with a thickness of 0.38 mm and a second polymer film 3.2 also with a thickness of 0.38 mm.
- the first polymer film 3.1 is a PVB film with a modulus of elasticity of less than 20 MPa
- the second polymer film 3.2 is a PVB film with a modulus of elasticity of greater than 100 MPa, each measured according to the ASTM D882 standard.
- the thermoplastic intermediate layer 3 in the second surface area B consists of, in this order, a first polymer film 3.1 with a thickness of 0.38 mm, a second polymer film 3.2 with a thickness of 50 ⁇ m and a first polymer film 3.1 also with a thickness of 0 .38mm.
- the first polymer films 3.1 are PVB films with a modulus of elasticity of less than 20 MPa
- the second polymer film 3.2 is a PET film with a modulus of elasticity of greater than 100 MPa, each measured according to the ASTM D882 standard.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22167021 | 2022-04-06 | ||
| PCT/EP2023/058075 WO2023194164A1 (de) | 2022-04-06 | 2023-03-29 | Windschutzscheibe mit verbesserter unfallsicherheit und diese umfassendes fahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4504512A1 true EP4504512A1 (de) | 2025-02-12 |
Family
ID=81748235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23715832.4A Pending EP4504512A1 (de) | 2022-04-06 | 2023-03-29 | Windschutzscheibe mit verbesserter unfallsicherheit und diese umfassendes fahrzeug |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4504512A1 (de) |
| CN (1) | CN117203054A (de) |
| WO (1) | WO2023194164A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3437552A (en) | 1967-08-01 | 1969-04-08 | Du Pont | Glass laminate and interlayer |
| JPH10115802A (ja) | 1996-10-11 | 1998-05-06 | Central Glass Co Ltd | 表示装置 |
| JPH10148787A (ja) | 1996-11-20 | 1998-06-02 | Central Glass Co Ltd | 表示装置 |
| FR2795365B1 (fr) | 1999-06-25 | 2002-07-12 | Saint Gobain Vitrage | Vitrage feuillete blinde, en particulier pour vehicules automobiles |
| JP2006098466A (ja) | 2004-09-28 | 2006-04-13 | Central Glass Co Ltd | 自動車用フロントガラス |
| JP4844362B2 (ja) | 2006-11-27 | 2011-12-28 | 旭硝子株式会社 | 合わせガラス |
| CN104267499B (zh) | 2014-10-14 | 2016-08-17 | 福耀玻璃工业集团股份有限公司 | 一种抬头显示系统 |
| US10981358B2 (en) | 2018-04-03 | 2021-04-20 | AGC Inc. | Laminated glass |
| RU2764891C1 (ru) * | 2018-08-29 | 2022-01-24 | Сэн-Гобэн Гласс Франс | Композитное оконное стекло |
-
2023
- 2023-03-29 WO PCT/EP2023/058075 patent/WO2023194164A1/de not_active Ceased
- 2023-03-29 CN CN202380009496.6A patent/CN117203054A/zh active Pending
- 2023-03-29 EP EP23715832.4A patent/EP4504512A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN117203054A (zh) | 2023-12-08 |
| WO2023194164A1 (de) | 2023-10-12 |
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