Membrane for automobile laminated glass and laminated glass

Abstract

The utility model relates to the field of automobile glass, and discloses a diaphragm for automobile laminated glass and laminated glass. The diaphragm comprises a diaphragm body (10), the diaphragm body (10) comprises a plurality of stacked resin layers, the diaphragm body (10) is provided with a first end portion (1a), a middle portion (1c) and a second end portion (1b) which are sequentially connected in the length direction of the diaphragm body (10), the thickness of the middle portion (1c) is fixed, and the thickness of the second portion (1b) is fixed. And the first end part (1a) and / or the second end part (1b) are / is of a wedge-shaped structure of which the thickness is gradually reduced from the middle part (1c) along the length direction. According to the diaphragm, the ghosting phenomenon of laminated glass can be reduced while the sound insulation effect of an automobile is achieved, so that the quality of head-up display is improved, and the effect of a head-up display is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile glass, specifically, relate to a film piece and laminated glass for automobile laminated glass. BACKGROUND

[0002] The automobile heads-up display system (HUD), also known as the head-up display system, its main function is to project the speed, navigation and other important driving information directly into the driver's field of view, so that the driver can obtain these key information without looking down or turning his head during driving. The core of this design concept is to center on the driver, through blind operation and multifunctional instrument panel, to reduce the driver's line of sight shift during driving, so as to maintain continuous attention to the road conditions in front, improve driving safety.

[0003] In the prior art, the front windshield is usually used to reflect the projected image, and the front windshield is a laminated glass composed of two layers of glass and a polyvinyl butyral film (PVB film for short) interlayer. When the light emitted by the projection light source of the heads-up display system passes through the two surfaces of the laminated glass in contact with the air, reflection occurs, and the reflected images on the two surfaces will be offset to form two ghost images that interfere with each other, especially when the thickness of the laminated glass is relatively thick, which greatly limits the clarity of the projected display image. To solve the ghosting problem of the heads-up display system, a wedge-shaped polymer film is now commonly used as the middle layer of the laminated glass, so that the thickness of the laminated glass changes in a wedge shape, so that the reflected images on the two surfaces seen by the driver are basically coincident, and the ghosting problem is ultimately eliminated to a great extent.

[0004] In recent years, due to noise pollution, which affects the comfort of people's living and working environment, noise reduction is an important indicator. The traditional wedge-shaped polymer film as the middle layer of the laminated glass has gradually failed to meet these needs. Now the soundproof PVB film realizes soundproof performance by using multi-layer composite technology. However, the PVB film with multi-layer composite technology is prone to ghosting problem during heads-up display, which affects driving safety. UTILITY MODEL CONTENTS

[0005] The utility model provides a film piece and laminated glass for automobile laminated glass in view of the problem that the PVB film with multi-layer composite technology is prone to ghosting during heads-up display, which can reduce the ghosting phenomenon of the laminated glass while meeting the soundproof effect of the automobile, thereby improving the quality of heads-up display and achieving the effect of the head-up display, and can also reduce the production cost of the film piece.

[0006] To solve the above technical problems, the utility model discloses a first aspect provides a kind of for the film of automobile laminated glass, including film body, the film body includes multiple superimposed resin layers, the film body has first end portion, intermediate portion and second end portion sequentially connected along its length direction, the thickness of the intermediate portion is fixed, the first end portion and / or the second end portion is gradually reduced in the wedge-shaped structure along the length direction thickness by the intermediate portion.

[0007] Preferably, the film body includes first resin layer, second resin layer and third resin layer sequentially superimposed along its thickness direction, the thickness of the second resin layer is fixed, at least one of the first resin layer and the third resin layer corresponds to the area of the first end portion and / or the second end portion in wedge-shaped structure.

[0008] Preferably, both the first resin layer and the third resin layer correspond to the area of the first end portion and the second end portion in wedge-shaped structure with the outside side gradually approaching the second resin layer.

[0009] Preferably, the first resin layer is wedge-shaped structure with first wedge angle, the third resin layer is wedge-shaped structure with second wedge angle, the difference between the first wedge angle and the second wedge angle is not higher than 5mard.

[0010] Preferably, the first resin layer and the third resin layer are both film layers made of triethylene glycol diisooctylate and polyvinyl butyral, and the second resin layer is a film layer made of triethylene glycol diisooctylate, dioctyl adipate and polyvinyl butyral.

[0011] Preferably, the first resin layer and the third resin layer are mirror image structures relative to the second resin layer

[0012] The ratio of the maximum thickness of the first resin layer to the thickness of the second resin layer is 3.4-3.6:1.

[0013] Preferably, the maximum thickness of the first resin layer is 280-320μm, and the thickness of the second resin layer is 80-120μm.

[0014] The utility model discloses a second aspect provides a kind of laminated glass, including outer layer glass, inner layer glass and the film piece described in the above first aspect, the film piece is located between the outer layer glass and the inner layer glass.

[0015] Preferably, the thickness of the outer layer glass and the inner layer glass is independently 2-3mm.

[0016] Preferably, the outer layer glass is provided with an ultraviolet-proof coating on the side away from the inner layer glass, and the inner layer glass is provided with a low-emissivity coating on the side away from the outer layer glass.

[0017] By the above technical solutions, the utility model has the advantages that:

[0018] The film piece for the automobile laminated glass has the advantages that:

[0019] The laminated glass has the advantages that:

[0020] Other technical features and effects of the utility model will be further described in the specific embodiments below. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application and are incorporated herein in their entirety. The drawings are as follows:

[0022] Figure 1 is a structural schematic view of a specific embodiment of the first end part in the utility model.

[0023] Figure 2 is a structural schematic view of a second specific embodiment of the film piece in the utility model.

[0024] Figure 3 is a structural schematic view of a third specific embodiment of the film piece in the utility model.

[0025] Figure 4 is a structural schematic view of a specific embodiment of the first end part in the utility model.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 10 film piece body 101 first resin layer

[0028] 102 second resin layer 103 third resin layer

[0029] 1a first end part 1b second end part

[0030] 1c middle part DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0032] First of all, it needs to be pointed out that in the following description, some orientation words such as "inner", "outer", "upper", "lower", "top", "bottom" and the like involved in the technical scheme of the present application are indicative of the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not indicative or suggestive of the devices or elements referred to having a particular orientation, being constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "connection", "installation", "fixation" should be understood broadly, for example, the connection can be fixed connection, or detachable connection, or integral connection; can be direct connection, or indirect connection through intermediate medium, can be internal communication of two components or mutual action relationship of two components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In a first aspect, the present application provides a film for automotive laminated glass, in a basic embodiment of the present application, referring to Figure 1 、 Figure 2 and Figure 3 , the film comprises a film body 10, the film body 10 comprises a plurality of superimposed resin layers, the film body 10 has a first end portion 1a, an intermediate portion 1c and a second end portion 1b connected in turn along the length direction thereof, the thickness of the intermediate portion 1c is fixed, and the first end portion 1a and / or the second end portion 1b is wedge-shaped structure with gradually decreasing thickness along the length direction from the intermediate portion 1c.

[0035] In the present application, the plurality of resin layers superimposed to form the film body 10 can improve the sound insulation effect of the laminated glass while transmitting light when applied to the laminated glass. The number of resin layers is not limited, which can be two, three, four, five or the like. The length direction of the film body 10 refers to the horizontal direction in Figure 1 , the thickness refers to the size in the thickness direction, and the thickness direction refers to the direction of superimposition of the plurality of resin layers, i.e. Figure 1The thickness of the intermediate portion 1c is fixed, which means that the thickness in the thickness direction is equal. The first end portion 1a and / or the second end portion 1b is provided in a wedge-shaped structure with the thickness gradually decreasing along the length direction of the intermediate portion 1c, which can reduce the ghosting phenomenon of the laminated glass, so that the images projected on the laminated glass are basically coincident. The diaphragm body 10 can be provided in a wedge-shaped structure with the thickness gradually decreasing along the length direction of the intermediate portion 1c for the first end portion 1a or the second end portion 1b, or for both the first end portion 1a and the second end portion 1b. The length of the first end portion 1a, the intermediate portion 1c and the second end portion 1b is not limited, and can be selected according to the size of the vehicle.

[0036] In the utility model, the diaphragm can be applied to laminated glass of various types of vehicles, for example, can be applied to independent front windshield, can be applied to laminated glass with front windshield and sunroof glass as an integrated type, and can be applied to laminated glass with front windshield, sunroof glass and rear windshield as an integrated type, and has wide application prospect and significant economic benefits.

[0037] Exemplarily, when the front windshield of the vehicle is independently arranged, the diaphragm is used as the intermediate layer of the front windshield, and the first end portion 1a in a wedge-shaped structure is located in the middle and bottom regions of the front windshield with the vertical direction as the reference, so that the effect of head-up display through the first end portion 1a can be achieved, and the intermediate portion 1c and the second end portion 1b are located in the top region of the front windshield. When the front windshield and the sunroof glass of the vehicle are integrated as laminated glass, the first end portion 1a in a wedge-shaped structure can be used as the intermediate layer of the front windshield, and the intermediate portion 1c and the second end portion 1b can be used as the intermediate layer of the sunroof glass. When the front windshield, the sunroof glass and the rear windshield of the vehicle are integrated as laminated glass, the first end portion 1a in a wedge-shaped structure can be used as the intermediate layer of the front windshield, the intermediate portion 1c can be used as the intermediate layer of the sunroof glass, and the second end portion 1b can be used as the intermediate layer of the rear windshield. In the above applications, the length of the first end portion 1a, the intermediate portion 1c and the second end portion 1b can be adjusted according to the size of the vehicle.

[0038] The diaphragm of the above basic embodiment of the utility model can be applied to laminated glass of various types of vehicles. During driving of the vehicle, the multiple superimposed resin layers can improve the sound insulation effect of the vehicle. By providing the first end portion 1a and / or the second end portion 1b in a wedge-shaped structure with the thickness gradually decreasing along the length direction of the intermediate portion 1c, the ghosting phenomenon of the laminated glass can be reduced, and the quality of head-up display can be improved to achieve the effect of head-up display.

[0039] As a preferred embodiment of the diaphragm body 10, referring to Figure 3The diaphragm body 10 includes a first resin layer 101, a second resin layer 102 and a third resin layer 103 which are sequentially stacked along the thickness direction of the diaphragm body 10, the thickness of the second resin layer 102 is fixed, and at least one of the first resin layer 101 and the third resin layer 103 has a wedge-shaped structure corresponding to the area of the first end portion 1a and / or the second end portion 1b. The arrangement of the first resin layer 101, the second resin layer 102 and the third resin layer 103 can improve the adhesion between the diaphragm body 10 and the glass while meeting the sound insulation effect, can adhere to the glass when the glass breaks, and can further reduce the risk of glass splashing causing personal injury.

[0040] In the utility model, at least one of the first resin layer 101 and the third resin layer 103 has a wedge-shaped structure corresponding to the area of the first end portion 1a and / or the second end portion 1b, which means that at least one of the first resin layer 101 and the third resin layer 103 has a wedge-shaped structure corresponding to the area of the first end portion 1a and / or the second end portion 1b. It can be that the first resin layer 101 has a wedge-shaped structure corresponding to the area of the first end portion 1a, it can be that the third resin layer 103 has a wedge-shaped structure corresponding to the area of the first end portion 1a, or it can be that the first resin layer 101 and the third resin layer 103 have wedge-shaped structures corresponding to the area of the first end portion 1a.

[0041] As a preferred embodiment of the first resin layer 101 and the third resin layer 103, referring to Figure 4 The first resin layer 101 and the third resin layer 103 have wedge-shaped structures corresponding to the area of the first end portion 1a and the second end portion 1b, and the outer side edge gradually approaches the second resin layer 102, which can further reduce the ghosting phenomenon. The outer side edge refers to the side of the first resin layer 101 or the third resin layer 103 away from the second resin layer 102.

[0042] As a specific embodiment of the first resin layer 101 and the third resin layer 103, referring to Figure 4 The first resin layer 101 has a wedge-shaped structure with a first wedge angle A, the third resin layer 103 has a wedge-shaped structure with a second wedge angle B, and the difference between the first wedge angle and the second wedge angle is not higher than 5 mard. The acute angle formed by the intersection of the two planes where the upper and lower surfaces of the first resin layer 101 along the length direction is the first wedge angle A, and the acute angle formed by the intersection of the two planes where the upper and lower surfaces of the third resin layer 103 along the length direction is the second wedge angle B. By setting the difference between the first wedge angle and the second wedge angle to be not higher than 5 mard, the wedge-shaped structure formed by the first end portion 1a and / or the second end portion 1b is an isosceles wedge-shaped structure, which can further reduce the ghosting phenomenon.

[0043] The first resin layer 101, the second resin layer 102 and the third resin layer 103 can be made of the same material or different materials, as a specific embodiment of the first resin layer 101, the second resin layer 102 and the third resin layer 103, the first resin layer 101 and the third resin layer 103 are both film layers made of triethylene glycol diisooctylate and polyvinyl butyral, and the second resin layer 102 is a film layer made of triethylene glycol diisooctylate, dioctyl adipate and polyvinyl butyral. The first resin layer 101, the second resin layer 102 and the third resin layer 103 made of the above-mentioned materials have close refractive indexes, further reduce the ghosting phenomenon, improve the quality of the head-up display, and improve the safety of the automobile driving. Among them, through the cooperation between triethylene glycol diisooctylate and polyvinyl butyral with good compatibility, the adhesion of the first resin layer 101 and the third resin layer 103 can be improved, and the adhesion between the first resin layer 101 and the third resin layer 103 and the glass can be improved; through the cooperation between triethylene glycol diisooctylate, dioctyl adipate and polyvinyl butyral with good compatibility, the flowability of the second resin layer 102 can be improved while ensuring the sound insulation performance of the diaphragm.

[0044] As another specific embodiment of the first resin layer 101, the second resin layer 102 and the third resin layer 103, referring to Figure 3 and Figure 4 , the first resin layer 101 and the third resin layer 103 have a mirror image structure with respect to the second resin layer 102, and the ratio of the maximum thickness of the first resin layer 101 to the thickness of the second resin layer 102 is 3.4-3.6:1, specifically 3.4:1, 3.5:1, 3.6:1, or any value between the two aforementioned values. The diaphragm with the above-mentioned thickness relationship can reduce defects such as indentation on the surface of the first resin layer 101, the second resin layer 102 and the third resin layer 103 when the diaphragm is produced by extrusion process, and further improve the quality of the diaphragm. Moreover, since the thickness of the second resin layer 102 is smaller than that of the first resin layer 101 and the third resin layer 103, the amount of raw materials is less, and the production cost of the diaphragm can be reduced under the premise of meeting the quality of the head-up display, which has significant economic benefits.

[0045] In the utility model, the first resin layer 101 and the third resin layer 103 have a mirror image structure with respect to the second resin layer 102, referring to Figure 3 , it means that the first resin layer 101 and the third resin layer 103 have the same shape, and the first resin layer 101 and the third resin layer 103 are mirror-symmetric about the second resin layer 102.

[0046] In order to further improve the light transmission performance of the diaphragm and eliminate the ghosting effect, preferably, the maximum thickness of the first resin layer 101 is 280-320 μm, and specifically can be 280 μm, 300 μm, 320 μm, or any value between the aforementioned two values; the thickness of the second resin layer 102 is 80-120 μm, and specifically can be 80 μm, 100 μm, 120 μm, or any value between the aforementioned two values.

[0047] The second aspect of the utility model provides a laminated glass, comprising outer glass, inner glass and the diaphragm of the first aspect, the diaphragm is located between outer glass and inner glass.

[0048] In the utility model, the preparation method of using the diaphragm as the intermediate layer of the laminated glass is not limited, and can be prepared by using conventional methods in the art, which will not be described here.

[0049] In the utility model, the thickness of the outer glass and the inner glass has no special requirement, and the tester can select according to the actual situation. As an optimal embodiment of the outer glass and the inner glass, the thickness of the outer glass and the inner glass is independently 2-3 mm, so as to further reduce the ghosting phenomenon and improve the quality of the head-up display.

[0050] As another optimal embodiment of the outer glass and the inner glass, the outer glass is provided with an ultraviolet-proof coating on the side away from the inner glass, and the inner glass is provided with a low-emissivity coating on the side away from the outer glass. The ultraviolet-proof coating can isolate most of the ultraviolet rays from the outside, reducing the impact of long-term ultraviolet radiation on the driver. The low-emissivity coating can keep the temperature in the car relatively balanced, and the car will not be easily affected by high or low temperature outside.

[0051] As a relatively preferred specific embodiment of the laminated glass in the utility model, referring to Figures 1-4The laminated glass comprises an outer layer glass, an inner layer glass and a film sheet, the film sheet is located between the outer layer glass and the inner layer glass, the thickness of the outer layer glass and the inner layer glass is 2-3 mm, the film sheet comprises a film sheet body 10, the film sheet body 10 has a first end portion 1a, an intermediate portion 1c and a second end portion 1b connected in sequence along the length direction thereof, the thickness of the intermediate portion 1c is fixed, the first end portion 1a and the second end portion 1b are wedge-shaped structures with the thickness gradually decreasing along the length direction from the intermediate portion 1c, the film sheet body 10 comprises a first resin layer 101, a second resin layer 102 and a third resin layer 103 superposed in sequence along the thickness direction thereof, the thickness of the second resin layer 102 is fixed, the first resin layer 101 and the third resin layer 103 both have wedge-shaped structures with the outer side gradually approaching the second resin layer 102, the first resin layer 101 is a wedge-shaped structure with a first wedge angle A, the third resin layer 103 is a wedge-shaped structure with a second wedge angle B, the difference between the first wedge angle A and the second wedge angle B is not higher than 5 mard, the first resin layer 101 and the third resin layer 103 are both film layers made of triethylene glycol diisooctylate and polyvinyl butyral, the second resin layer 102 is a film layer made of triethylene glycol diisooctylate, dioctyl adipate and polyvinyl butyral, the first resin layer 101 and the third resin layer 103 have a mirror image structure with respect to the second resin layer 102, the ratio of the maximum thickness of the first resin layer 101 to the thickness of the second resin layer 102 is 3.4-3.6:1, the maximum thickness of the first resin layer 101 is 280-320 mu m, and the thickness of the second resin layer 102 is 80-120 mu m.

[0052] The laminated glass provided by the above embodiment has the following use process:

[0053] The laminated glass is an integrated laminated glass for the front windshield, the sunroof glass and the rear windshield of the automobile, the first end portion 1a in the wedge-shaped structure is used as the intermediate layer of the front windshield, the intermediate portion 1c with the fixed thickness is used as the intermediate layer of the sunroof glass, and the second end portion 1b in the wedge-shaped structure is used as the intermediate layer of the rear windshield.

[0054] As can be seen from the above description, the laminated glass provided by the utility model can improve the sound insulation effect of the automobile and reduce the ghosting phenomenon of the laminated glass in the process of driving the automobile, thereby improving the quality of the head-up display and achieving the effect of the head-up display; and under the premise of meeting the quality of the head-up display, the production cost of the film sheet can be reduced by the arrangement of the intermediate portion 1c, and the economic benefit is remarkable.

[0055] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present application will not further describe various possible combination manners. However, these simple modifications and combinations should also be considered as disclosed content of the present application, and all belong to the protection scope of the present application.

Claims

1. A film for automotive laminated glass, characterized by, The diaphragm body (10) comprises a plurality of superimposed resin layers, and has a first end portion (1a), an intermediate portion (1c) and a second end portion (1b) connected in sequence along the length direction thereof, the thickness of the intermediate portion (1c) is fixed, and the first end portion (1a) and / or the second end portion (1b) has a wedge-shaped structure with gradually decreasing thickness along the length direction from the intermediate portion (1c).

2. The membrane of claim 1, wherein, The diaphragm body (10) comprises a first resin layer (101), a second resin layer (102) and a third resin layer (103) superimposed in sequence along the thickness direction thereof, the thickness of the second resin layer (102) is fixed, and at least one of the first resin layer (101) and the third resin layer (103) has a wedge-shaped structure corresponding to the first end portion (1a) and / or the second end portion (1b).

3. The diaphragm of claim 2, wherein, Both the first resin layer (101) and the third resin layer (103) have a wedge-shaped structure with the outer side gradually approaching the second resin layer (102) corresponding to the first end portion (1a) and the second end portion (1b).

4. The diaphragm of claim 3, wherein, The first resin layer (101) has a wedge-shaped structure with a first wedge angle, and the third resin layer (103) has a wedge-shaped structure with a second wedge angle, and the difference between the first wedge angle and the second wedge angle is not higher than 5 mard.

5. The diaphragm of any one of claims 2 to 4, wherein, The first resin layer (101) and the third resin layer (103) are both film layers made of triethylene glycol diisooctylate and polyvinyl butyral, and the second resin layer (102) is a film layer made of triethylene glycol diisooctylate, dioctyl adipate and polyvinyl butyral.

6. The diaphragm of any one of claims 2 to 4, wherein, The first resin layer (101) and the third resin layer (103) have a mirror image structure with respect to the second resin layer (102), and the ratio of the maximum thickness of the first resin layer (101) to the thickness of the second resin layer (102) is 3.4-3.6:

1.

7. The diaphragm of claim 6, wherein The maximum thickness of the first resin layer (101) is 280-320 μm, and the thickness of the second resin layer (102) is 80-120 μm.

8. A laminated glass characterized by The diaphragm according to any one of claims 1 to 7 is arranged between an outer layer glass and an inner layer glass.

9. The laminated glass according to claim 8, characterized by The thickness of the outer layer glass and the inner layer glass is independently 2-3 mm.

10. The laminated glass according to claim 8, characterized by The outer layer glass is provided with an ultraviolet-proof coating on the side away from the inner layer glass, and the inner layer glass is provided with a low-emissivity coating on the side away from the outer layer glass.

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