CN110744870A - Layer assembly, vehicle window and method for producing a layer assembly - Google Patents

Layer assembly, vehicle window and method for producing a layer assembly Download PDF

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Publication number
CN110744870A
CN110744870A CN201810810616.3A CN201810810616A CN110744870A CN 110744870 A CN110744870 A CN 110744870A CN 201810810616 A CN201810810616 A CN 201810810616A CN 110744870 A CN110744870 A CN 110744870A
Authority
CN
China
Prior art keywords
layer
resin
layer assembly
assembly
resin layers
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
CN201810810616.3A
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Chinese (zh)
Inventor
郭晓锋
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 Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass 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 Glass France SAS filed Critical Saint Gobain Glass France SAS
Priority to CN201810810616.3A priority Critical patent/CN110744870A/en
Priority to PCT/CN2019/090845 priority patent/WO2020019890A1/en
Priority to ARP190101751A priority patent/AR115616A1/en
Publication of CN110744870A publication Critical patent/CN110744870A/en
Pending legal-status Critical Current

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    • 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 general shape other than plane
    • 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
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10559—Shape of the cross-section
    • B32B17/10568—Shape of the cross-section varying in thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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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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    • B32B17/1055—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
    • B32B17/10798—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 silicone
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • 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
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    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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    • B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
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    • B32B37/04—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the partial melting of at least one layer
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    • B32B7/02—Physical, chemical or physicochemical properties
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    • 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
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
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Abstract

The invention provides a layer assembly, the section of the layer assembly in a first direction is wedge-shaped, the layer assembly comprises a plurality of resin layers, and the material of at least three pairs of adjacent resin layers in the plurality of resin layers is different. The invention also provides a vehicle window and a method of manufacturing a layer assembly. The invention can provide good HUD performance and acoustic isolation performance.

Description

Layer assembly, vehicle window and method for producing a layer assembly
Technical Field
The present invention relates generally to a layer assembly, and more particularly to a layer assembly having both HUD (Head Up Display) and acoustic isolation, a vehicle window including the layer assembly, and a method of manufacturing the layer assembly.
Background
A front windshield of a vehicle is generally composed of a laminated glass, and the laminated glass generally includes two glass plates and an intermediate resin layer interposed between the two glass plates.
More and more vehicles are currently available that provide a HUD function on the front windshield, so that information related to the vehicle or the vehicle can be projected directly on the front windshield, and the driver can obtain the required information on the front windshield in a head-up state without looking down at the instrument panel.
However, if the HUD function is implemented on a common laminated glass, the projected image will generate two reflections at the interface between the inner glass plate and the air and at the interface between the outer glass plate and the air of the laminated glass, and the positions of virtual images generated by the two reflections will not overlap, so that the image observed by the driver will generate "double images". Thus, laminated glass for HUDs typically employ a "wedge-shaped" intermediate resin layer, i.e., of gradually varying thickness, to ensure that the overall cross-section of the laminated glass is wedge-shaped. By using the wedge-shaped section of the laminated glass, the virtual images generated by two reflections generated at the interface between the inner glass plate and the air and the interface between the outer glass plate and the air of the laminated glass can be overlapped with each other, thereby eliminating double images.
In addition, some vehicles begin to provide an acoustic isolation function for the windows of the vehicle, so as to better isolate the sound inside and outside the vehicle, but the isolation effect still needs to be improved.
Disclosure of Invention
The present invention aims to provide a layer assembly which not only has HUD properties but also provides good acoustic isolation.
The present invention first provides a layer assembly having a wedge-shaped cross section in a first direction, the layer assembly including a plurality of resin layers, at least three pairs of adjacent resin layers of the plurality of resin layers being different in material.
By "wedge-shaped" is meant that the layer assembly is of a gradually changing thickness in at least one direction, and this is not limited to the case where the layer assembly extends strictly along a plane, but the layer assembly may also extend along a curved surface, for example when the layer assembly is provided as an intermediate layer between two curved glass sheets, the layer assembly will follow the curved surface in conformity with the curvature of the two glass sheets.
Since the layer assembly has a wedge-shaped cross section, when it is disposed as an intermediate layer between two glass plates and thus constitutes a laminated glass, the laminated glass will have good HUD performance, and since the cross section of the laminated glass will also assume a wedge shape by virtue of the wedge-shaped cross section of the layer assembly, when an image is projected onto the laminated glass, virtual images generated by two reflections produced by the projected image at the interface of the inner glass plate and the air of the laminated glass and at the interface of the outer glass plate and the air can be superimposed on each other, thereby eliminating ghost images.
As regards the acoustic insulation properties of the layer assembly, the applicant has found that the intensity of the acoustic wave is constantly reduced not only as the distance of propagation increases when propagating inside a single medium, but also more significantly when propagating through the interface of two different media. In the layer assembly of the present invention, at least three pairs of adjacent resin layers are made of different materials, so that at least 3 interfaces of different media are formed between the three pairs of adjacent resin layers, and at least 5 times of remarkable attenuation is formed on the outermost 2 surfaces of the layer assembly, so that the acoustic isolation performance is excellent. Further, since the layer assembly of the present invention can provide significant attenuation of acoustic waves occurring at different medium interfaces more times, it can achieve more excellent acoustic isolation effects at the same total thickness, even at a smaller total thickness.
Preferably, the plurality of resin layers includes at least two acoustic layers. The "acoustic layer" in the present invention is a layer structure made of a material that can provide a more significant attenuation effect on acoustic waves than other ordinary media. The provision of at least two acoustic layers ensures that the layer assembly according to the invention also provides a strong attenuation of sound waves within the single medium of each acoustic layer.
Preferably, at least four pairs of adjacent resin layers in the plurality of resin layers are made of different materials, and two resin layers with the lowest hardness in the plurality of resin layers are not adjacent and are not exposed to the outermost side of the layer assembly. Thus, the layer package, together with the outermost 2 surfaces of the layer package, is able to provide at least 6 attenuations of the acoustic wave at the interface of the different media. Further, the resin layer having a higher hardness in the layer assembly sandwiches the resin layer having a lower hardness therebetween, thereby better supporting the entire structure of the layer assembly and further facilitating the form retention of the layer assembly. Further, the applicant has also developed that the attenuation effect on the acoustic wave occurring at the interface of different media is more significant when the difference between the acoustic properties of the two media is larger, whereas in the layer assembly of the present invention the resin layer with higher hardness is spaced apart from the resin layer with lower hardness, and considering that the larger difference in hardness between the different media means a larger difference in acoustic properties, the layer assembly of the present invention is capable of providing a more significant attenuation effect on the acoustic wave at the interface of media with different hardness.
Preferably, the layer assembly includes three first resin layers and two second resin layers which are not adjacent and are not exposed to the outermost side of the layer assembly, and the hardness of the second resin layers is less than that of the first resin layers.
In the present invention, "first" and "second" in "first resin layer" and "second resin layer" are used to refer to the first and second resin materials, respectively, and thus, in the present invention, they are referred to as the first and second resin layers, respectively, even if the sectional shape thereof is changed, as long as the resin material thereof is not changed with respect to the first and second resin layers.
Preferably, the layer assembly is formed by heat and pressure after stacking at least two layer members each including two first resin layers and one second resin layer sandwiched between the two first resin layers. The applicant has found that the application of heat and pressure enables the fusion bonding between the layer elements and/or the shaping of the wedge-shaped cross-section of all or part of the internal layer structure of the layer elements without altering the multilayer structure of the layer assembly and of the internal layer structure of the layer elements. The invention is not limited to the execution of the hot pressing operation between the layer members, and may be applied to the case where the layer members are simply bonded to each other, or may be applied to the case where the at least two layer members are stacked between two glass plates and then the whole laminated glass structure is hot press-molded. After hot pressing, the first resin layers which originally belong to the two layer elements respectively and are in contact are fused into a single first resin layer, so that the finally formed layer assembly at least comprises a five-layer structure of first resin layer/second resin layer/first resin layer (formed by fusing the two original first resin layers)/second resin layer/first resin layer.
Preferably, the at least two layer elements are of uniform thickness before being stacked and heated and pressed. It is therefore not necessary to prepare a layer element having a tapered thickness beforehand, so that the cost can be reduced. While the overall wedge-shaped thickness profile of the layer assembly is formed together in a hot press after the stacking of the layer elements.
Preferably, at least one of the at least two layer elements is wedge-shaped in cross-section in the first direction before being stacked and heated and pressed, and the layer element having the wedge-shaped cross-section in the first direction is formed by pre-heating and pressing the layer element having a uniform thickness. That is, at least one layer member is formed in advance into a wedge-shaped thickness configuration by hot pressing before stacking the layer members, so that the complexity of parameter control of the hot pressing operation after stacking the layer members can be reduced.
Preferably, the cross-section of at least one first resin layer and/or at least one second resin layer in the layer assembly in the first direction is wedge-shaped. That is, the overall wedge-shaped thickness profile of the layer assembly may be achieved by molding any one or more resin layers within it into a wedge-shaped cross-section.
Preferably, the diffusion angle of the cross-sectional shape of the layer assembly in the first direction is 0.2-0.7 mrad. This angular range can ensure better HUD performance.
Preferably, the material of the first resin layer is PVB (polyvinyl butyral) and/or PET (polyethylene terephthalate), and the material of the second resin layer is one or more of modified PVB, EVA (ethylene-vinyl acetate copolymer), PU (polyurethane) resin, PVC (polyethylene) resin and silicone resin.
"modified PVB" in the context of the present invention can include both physically modified PVB and chemically modified PVB. Physically modified PVB can be prepared by incorporating other fillers, such as organic materials, inorganic materials, rubber types, thermoplastic elastomers, other plastic types, or some additives into the PVB matrix by known mixing, compounding, and the like methods. Chemically modified PVB can be a material that has been altered in the chemical constitution of the PVB matrix by known means such as functional group modification, condensation, and the like.
The invention also provides a vehicle window comprising two glass sheets, and the vehicle window further comprises the layer assembly, wherein the layer assembly is arranged between the two glass sheets.
The present invention also provides a method of manufacturing a laminate assembly, the method comprising:
step 1, providing at least two layer members, each of which comprises two first resin layers and a second resin layer sandwiched between the two first resin layers, the hardness of the second resin layer being less than that of the first resin layer; and
and 2, after the at least two layer elements are stacked, heating and pressurizing to form the layer assembly, wherein the section of the layer assembly in the first direction is wedge-shaped.
As described above, the laminating and hot-pressing of the at least two layer elements in step 2 may be performed either simply by bonding the layer elements to each other or by laminating the at least two layer elements between two glass plates and then hot-pressing the entire laminated glass structure.
Preferably, the second resin layer is an acoustic layer.
Preferably, each layer element in step 1 is of uniform thickness, or at least one of the at least two layer elements in step 1 is wedge-shaped in cross-section in the first direction.
Preferably, the layer member having a wedge-shaped cross section in the first direction is formed by heating and pressing a layer member having a uniform thickness.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic cross-sectional view of a layer assembly of example 1 of the present invention.
Fig. 2 is a schematic cross-sectional view of a layer assembly of example 2 of the present invention.
Fig. 3 is a schematic view of a method of manufacturing a layer assembly of example 1 of the present invention.
Fig. 4 is a schematic view of a method of manufacturing a layer assembly of example 2 of the present invention.
Fig. 5 is a schematic view of a vehicle window of the present invention when used in a HUD.
It should be understood that the drawings are not to scale.
Detailed Description
Example 1
As shown in fig. 1, this embodiment provides a layer assembly 100 having a wedge-shaped thickness-graded cross-section with a diffusion angle of 0.5mrad, i.e. at an extension length of 1 meter, if the thickness T1 of the narrower end of the wedge-shaped cross-section of the layer assembly 100 is 0.7mm, the thickness T2 of the wider end of the wedge-shaped cross-section will be 1.2 mm.
The layer assembly 100 includes three first resin layers 101, 103, and 105, and two second resin layers 102 and 104. Thus, a flat surface (when the layer assembly 100 extends along a flat surface) or a curved surface (when the layer assembly 100 extends along a curved surface) P1-P6 each constitute an interface between different media, which will be able to create a significant attenuation of acoustic waves. Of course, the acoustic wave will also be attenuated continuously as the propagation distance increases inside each of the first or second resin layers.
The first resin layer is made of PVB, and the second resin layer is made of modified PVB. Since the second resin layer is less hard than the first resin layer, this means that the first and second resin layers have a large difference in acoustic properties, and therefore a very significant attenuation of the sound waves is created at the interface P2-P5.
In addition, since the second resin layer is harder than the first resin layer, the sound wave is attenuated at a higher rate in the second resin layer than in the first resin layer, and thus the second resin layer itself has a stronger attenuation effect on the sound wave, and thus both the second resin layers constitute the acoustic layer in this embodiment.
In addition, the first resin layer with higher hardness is positioned at the outer side of the layer assembly 100, and the second resin layer with lower hardness is arranged at intervals, so that the first resin layer can better support and maintain the whole structure of the layer assembly 100.
Further, in the layer assembly 100, the first resin layers 101, 103 and 105 each have a wedge shape in cross section, and the second resin layers 102 and 104 are uniform in thickness in that direction.
Although the layer assembly 100 comprises 5 resin layers in the present embodiment, it may comprise more or less resin layers, but the material and number of the resin layers should at least ensure that three interfaces of different media are formed inside the layer assembly, thereby ensuring a good acoustic isolation effect.
Although the materials of layers 101, 103 and 105 are the same in this embodiment, they may not be completely the same, and similarly, the materials of layers 102 and 104 may not be the same.
In addition, the material of the first resin layer can also be selected from PET or the combination of PVB and PET, and the material of the second resin layer can also be selected from EVA, PU resin, PVC resin and organic silicon resin or the combination of EVA, PU resin, PVC resin and organic silicon resin and a plurality of components in the modified PVB.
Example 2
As shown in fig. 2, the present embodiment provides a layer assembly 200 that differs from the layer assembly 100 of embodiment 1 only in that: in the present embodiment, the cross-sections of the layers 201-205 in the plane of the figure are all wedge-shaped.
Further, variations of the various embodiments mentioned in embodiment 1 are also applicable to the present embodiment.
Further, for a layer assembly similar to examples 1 and 2 comprising 5 internal layer structures, even for a layer assembly comprising fewer or more internal layer structures, the number and distribution positions of the layer structures of uniform thickness and the layer structures having a wedge-shaped cross-section in these internal layer structures can be selected according to the specific application, as long as it is ensured that the overall cross-section of the layer assembly is wedge-shaped and that the interior of the layer assembly has at least three interfaces between different media.
Example 3
Referring to fig. 3, the present embodiment provides a method of manufacturing the layer assembly 100 of example 1.
Step S1, providing two layer elements 100a and 100b, the layer element 100a comprising the first resin layers 101 and 103a and the second resin layer 102, the layer element 100b comprising the first resin layers 103b and 105 and the second resin layer 104. At this time, the layer members 100a and 100b are uniform in thickness.
In step S2, the layer members 100a and 100b are subjected to heat and pressure treatment, respectively, to slightly melt the layers 101, 103a, 103b, and 105, thereby being deformed and finally formed into a wedge shape.
In step S3, the layer members 100a and 100b are stacked and heated and pressed again to slightly melt the layers 103a and 103b to be fused into a single first resin layer 103.
Although the present embodiment performs the hot press process on both the layer members to change the sectional shape thereof in step S2, it is also possible to perform the hot press process on only one of the layer members to change the sectional shape thereof without performing any process on the other layer member, thereby keeping the sectional shape thereof constant before and after step S2. In addition, in step S2, only the first resin layer on one side of the laminate element subjected to the heat press treatment may be deformed to obtain a wedge-shaped interface, while the first resin layer on the other side remains unchanged in shape, for example, in step S2, only the layer 101 of the laminate element 100a may be changed to a wedge shape while the layer 103a remains unchanged in cross-sectional shape. Further, even step S2 may be skipped entirely, and step S3 is proceeded to immediately after step S1. In these cases, the internal layer structure of the layer assembly 100, which has not yet assumed the desired cross-sectional shape immediately before the step S3 is entered, and the overall cross-sectional shape of the layer assembly 100 will be finally formed into the desired shape by hot pressing in step S3.
For step S3, the heat and pressure may be applied only to the laminated layer elements or to the entire laminated glass structure formed after the laminated layer elements are laminated between two glass sheets.
When the layer assembly 100 comprises more layer structures, the present manufacturing method may also be adapted to use more layer elements, with/without separate pre-heat pressing, which are then stacked and heat pressed to form the final layer assembly 100.
Example 4
Referring to fig. 4, the present embodiment provides a method of manufacturing the layer assembly 200 of example 2.
Step S1', providing two layered elements 200a and 200b, the layered element 200a comprising the first resin layers 201 and 203a and the second resin layer 202, and the layered element 200b comprising the first resin layers 203b and 205 and the second resin layer 204. At this time, both the layer members 200a and 200b are uniform in thickness.
Step S2', the layer members 200a and 200b are respectively subjected to heat and pressure treatment to slightly melt each internal layer structure of the two layer members, thereby being deformed and formed into a wedge shape.
Step S3', the layer members 200a and 200b are stacked and heated and pressed again, so that the layers 203a and 203b are slightly melted to be fused into a single first resin layer 203.
Further, variations of the various embodiments mentioned in embodiment 3 are also applicable to the present embodiment.
Example 5
Referring to fig. 5, the present embodiment provides a vehicle window 300, the vehicle window 300 comprising two glass sheets, between which the layer assembly of embodiment 1 or 2 or the variations mentioned above is sandwiched. Because the layer assembly of the present invention has a wedge-shaped cross-section, the vehicle window 300 also has a wedge-shaped cross-section.
The HUD function of the vehicle window 300 will be explained below with reference to fig. 5, wherein for the sake of clarity the interior layer structure of the vehicle window 300 is not depicted in fig. 5, but only the two outer surfaces of the vehicle window 300 are depicted. When image a is projected toward the vehicle window 300, a portion of the projected light rays are reflected on the first side surface of the vehicle window 300 (e.g., at point B1) to enter the human eye C, enabling the user to observe the virtual image D1; at the same time, another portion of the light rays refracts on the first side surface of the window 300 (e.g., at point B2) and then reaches and reflects on the second side surface of the window 300 (e.g., at point B3), then returns to and refracts on the first side surface and finally enters the human eye C, causing the user to observe the virtual image D2. In the present invention, since the cross section of the entire window 300 is wedge-shaped, the two light rays can leave the window 300 at the same point (point B1) and be emitted to the human eye, so that the virtual images D1 and D2 observed by the human eye are actually coincident, which can prevent the user from observing the ghost image of the projected image.
In addition, although the diffusion angle of the wedge-shaped cross section of the layer assembly in this embodiment is 0.5mrad, a diffusion angle in the range of 0.2-0.7mrad is advantageous for the HUD function.
In addition, since the layer assembly in the above-described embodiment is employed in the vehicle window 300 of the present embodiment, it will also have excellent acoustic insulation performance.
It will be appreciated by those skilled in the art that changes could be made to the embodiments described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present invention as defined by the appended claims.

Claims (19)

1. A layer assembly, characterized in that the cross section of the layer assembly in a first direction is wedge-shaped, the layer assembly comprises a plurality of resin layers, and the material of at least three pairs of adjacent resin layers in the plurality of resin layers is different.
2. The layer assembly of claim 1, wherein the plurality of resin layers includes at least two acoustic layers.
3. The layer assembly of claim 1 or 2, wherein at least four pairs of adjacent resin layers of the plurality of resin layers are different in material, and two resin layers of the lowest hardness of the plurality of resin layers are not adjacent and are not exposed to the outermost side of the layer assembly.
4. The layer assembly of any of claims 1-3, wherein the layer assembly comprises three first resin layers and two second resin layers that are not adjacent and are not exposed to an outermost side of the layer assembly, the second resin layers having a hardness that is less than a hardness of the first resin layers.
5. The layer assembly of claim 4, wherein the layer assembly is thermoformed from at least two layer elements stacked, each of the layer elements comprising two first resin layers and a second resin layer sandwiched between the two first resin layers.
6. The layer assembly of claim 5, wherein the at least two layer elements are of uniform thickness prior to being stacked and heated and pressed.
7. The layer assembly of claim 5, wherein at least one of the at least two layer elements is wedge-shaped in cross-section in the first direction before being stacked and heated and pressed, and the layer element having a wedge-shaped cross-section in the first direction is pre-heat and pressed to form from a layer element of uniform thickness.
8. The layer assembly of any one of claims 4-7, wherein a cross-section of at least one first resin layer and/or at least one second resin layer in the layer assembly in the first direction is wedge-shaped.
9. The layer assembly of any one of claims 1 to 8, wherein the diffusion angle of the cross-sectional shape of the layer assembly in the first direction is 0.2-0.7 mrad.
10. The layer assembly of any one of claims 1 to 9, wherein the first resin layer is comprised of PVB and/or PET and the second resin layer is comprised of a combination of one or more of modified PVB, EVA, PU resin, PVC resin and silicone resin.
11. A vehicle window comprising two glass sheets, wherein the vehicle window further comprises a layer assembly according to any one of claims 1 to 10, the layer assembly being disposed between the two glass sheets.
12. A method of manufacturing a layer assembly, the method comprising:
step 1, providing at least two layer members, each of which comprises two first resin layers and a second resin layer sandwiched between the two first resin layers, the hardness of the second resin layer being less than that of the first resin layer; and
and 2, after the at least two layer elements are stacked, heating and pressurizing to form the layer assembly, wherein the section of the layer assembly in the first direction is wedge-shaped.
13. The manufacturing method of claim 12, wherein the second resin layer is an acoustic layer.
14. The manufacturing method according to claim 12 or 13, wherein each layer member in step 1 is uniform in thickness.
15. The manufacturing method of claim 12 or 13, wherein at least one of the at least two layer elements in step 1 is wedge-shaped in cross-section in the first direction.
16. The manufacturing method as claimed in claim 15, wherein the layer member whose cross section in the first direction is wedge-shaped is formed by heating and pressing a layer member having a uniform thickness.
17. The manufacturing method according to any one of claims 12 to 16, wherein a cross section of at least one first resin layer and/or at least one second resin layer in the layer assembly in the first direction is wedge-shaped.
18. The method of manufacturing of any one of claims 12-17, wherein the diffusion angle of the cross-sectional shape of the layer assembly in the first direction is 0.2-0.7 mrad.
19. The method according to any one of claims 12 to 18, wherein the first resin layer is made of PVB and/or PET, and the second resin layer is made of one or more of modified PVB, EVA, PU resin, PVC resin, and silicone resin.
CN201810810616.3A 2018-07-23 2018-07-23 Layer assembly, vehicle window and method for producing a layer assembly Pending CN110744870A (en)

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CN201810810616.3A CN110744870A (en) 2018-07-23 2018-07-23 Layer assembly, vehicle window and method for producing a layer assembly
PCT/CN2019/090845 WO2020019890A1 (en) 2018-07-23 2019-06-12 Layer assembly, vehicle window and method for manufacturing layer assembly
ARP190101751A AR115616A1 (en) 2018-07-23 2019-06-24 LAYER ASSEMBLY, VEHICLE WINDOW AND METHOD FOR MANUFACTURING A LAYER ASSEMBLY

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US6534152B2 (en) * 1989-09-28 2003-03-18 Ppg Industries Ohio, Inc. Windshield for head-up display system
JP2007223883A (en) * 2005-12-26 2007-09-06 Asahi Glass Co Ltd Laminated glass for vehicle
JP2008201667A (en) * 2007-01-24 2008-09-04 Asahi Glass Co Ltd Laminated glass for vehicle

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Application publication date: 20200204