High-ultraviolet-absorption intermediate film for skylight glass and skylight glass

Abstract

The utility model relates to the field of interlayer films of laminated glass, in particular to an interlayer film for skylight glass with high ultraviolet absorption and the skylight glass. According to the intermediate film for the skylight glass with the high ultraviolet absorption performance, the intermediate film is of a multi-layer composite structure and comprises at least one sound insulation layer and at least one ultraviolet absorption layer; the at least one ultraviolet ray absorbing layer is configured to absorb ultraviolet rays in a wavelength range of 280 nm to 400 nm; the at least one sound insulation layer and the at least one ultraviolet absorption layer are not located on the same layer, or one or more of the at least one sound insulation layer and one or more of the at least one ultraviolet absorption layer are located on the same layer. According to the intermediate film for the skylight glass with high ultraviolet absorption and the skylight glass provided by the utility model, the intermediate film is arranged on the surface of the liquid crystal film of the skylight glass, so that ultraviolet rays in full wave bands in sunlight can be effectively absorbed, and the aging and the like of polymer films such as the liquid crystal film in the skylight glass are avoided.

Description

Technical Field

[0001] This utility model relates to the field of interlayer films for laminated glass, specifically to an interlayer film for skylight glass with high ultraviolet absorption and skylight glass. Background Technology

[0002] With the rapid development of the automotive industry, the automotive laminated glass industry has seen the emergence of high-value-added products such as intelligent panoramic sunroofs, dimmable glass, head-up display glass, and ultra-high insulation glass. Among these, sun protection and heat insulation functions have received particular attention from the automotive industry, which is also a core pain point for panoramic sunroofs. To address this issue and meet the needs of car users, automotive glass manufacturers have successively launched new intelligent dimming sunroofs. This intelligent dimming sunroof eliminates the need for additional physical sunshades, meeting users' daily driving needs for heat insulation, sun shading, and UV protection. It effectively enhances the sense of space inside the car, creating a more comfortable and natural driving experience. Furthermore, it can adjust the transparency of the sunroof glass according to the individual preferences and actual needs of the driver and passengers, precisely controlling the light and privacy inside the vehicle.

[0003] The liquid crystal materials in sunroof glass are susceptible to molecular structural damage under the influence of temperature and ultraviolet radiation, leading to aging of the dimming components and severely impacting their lifespan. Ultraviolet radiation in sunlight has wavelengths ranging from 280nm to 400nm. Existing sunroof glass cannot completely absorb all wavelengths of ultraviolet radiation within this range, especially the higher wavelengths. Furthermore, various additives are needed to absorb ultraviolet radiation, and the addition of these additives can affect the light transmittance and other properties of the sunroof glass.

[0004] To address the above issues, there is an urgent need to invent a high-UV-absorbing interlayer film for sunroof glass and a sunroof glass itself, in order to solve the problem that existing sunroof glass cannot completely absorb all wavelengths of UV radiation from sunlight, thus affecting the performance of the sunroof glass. Utility Model Content

[0005] The first aspect of this utility model provides an interlayer film for sunroof glass with high ultraviolet absorption. The primary objective is to develop an interlayer film for use on sunroof glass to protect the light-adjusting materials in the sunroof glass and prevent them from aging prematurely under ultraviolet radiation.

[0006] To achieve the above technical objectives, the technical solution adopted in this application is as follows:

[0007] An interlayer for a high ultraviolet absorption sunroof glass, the interlayer being a multi-layer composite structure, the interlayer comprising at least one sound-insulating layer and at least one ultraviolet-absorbing layer; at least one ultraviolet-absorbing layer being configured to absorb ultraviolet light in the wavelength range of 280nm-400nm; at least one sound-insulating layer and at least one ultraviolet-absorbing layer are not located in the same layer, or one of the at least one sound-insulating layer and one of the at least one ultraviolet-absorbing layer are located in the same layer.

[0008] According to the above-described high ultraviolet absorption sunroof glass interlayer film, the interlayer film has a three-layer composite structure, the interlayer film includes a first surface layer, an intermediate layer and a second surface layer stacked sequentially, one or more of the first surface layer, the intermediate layer and the second surface layer are configured as the sound insulation layer, and one or more of the first surface layer, the intermediate layer and the second surface layer are configured as the ultraviolet absorption layer.

[0009] According to the above-described high ultraviolet absorption sunroof glass interlayer film, the interlayer is configured as a sound insulation layer, and the first surface layer, the interlayer and the second surface layer are respectively configured as a first ultraviolet absorption layer, a second ultraviolet absorption layer and a third ultraviolet absorption layer, and the first ultraviolet absorption layer, the second ultraviolet absorption layer and the third ultraviolet absorption layer are configured to absorb ultraviolet rays in different wavelength ranges.

[0010] According to the above-described high ultraviolet absorption sunroof glass interlayer film, the interlayer is configured as the sound insulation layer, the first surface layer and the second surface layer are configured as the fourth ultraviolet absorption layer and the fifth ultraviolet absorption layer, and the fourth ultraviolet absorption layer and the fifth ultraviolet absorption layer are configured to absorb ultraviolet rays in different wavelength ranges.

[0011] According to the above-described high ultraviolet absorption sunroof glass interlayer, the interlayer is configured as the sound insulation layer, and the interlayer is configured as an ultraviolet absorption layer, wherein the ultraviolet absorption layer is configured to absorb ultraviolet rays with wavelengths of 280nm-400nm.

[0012] According to the above-described high ultraviolet absorption skylight glass intermediate film, the thickness ratio of the first surface layer, the intermediate layer and the second surface layer is (1-5):(1-5):(1-5).

[0013] According to the above-described high ultraviolet absorption sunroof glass interlayer film, the sum of the thickness of the first surface layer and the thickness of the second surface layer is 80%-120% of the thickness of the interlayer layer, and the thickness of the first surface layer is 80%-120% of the thickness of the second surface layer.

[0014] According to the above-described high ultraviolet absorption sunroof glass interlayer, the sound insulation layer is a sound insulation polyvinyl acetal resin layer, the ultraviolet absorption layer is an ultraviolet absorption polyvinyl acetal resin layer, and the interlayer is a polyvinyl acetal resin film.

[0015] The second aspect of this utility model provides a sunroof glass for automobiles. The second objective is to improve the high-wavelength ultraviolet absorption rate of the sunroof glass, avoid the aging effect of ultraviolet rays on the liquid crystal film in the sunroof glass, and extend the service life of the sunroof glass.

[0016] A sunroof glass for automobiles, the sunroof glass comprising a first glass, an intermediate film for sunroof glass with high ultraviolet absorption as described above, a liquid crystal film, an adhesive film, and a second glass, which are stacked sequentially; wherein the adhesive film comprises an EVA film or a polyvinyl acetal resin film.

[0017] According to the above-described automotive sunroof glass, the sunroof glass includes an outer surface and an inner surface, the outer surface is disposed on one side close to the intermediate film for sunroof glass with high ultraviolet absorption, and the inner surface is disposed on the other side away from the intermediate film for sunroof glass with high ultraviolet absorption; the outer surface of the sunroof glass faces the direction of sunlight.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] The high ultraviolet absorption interlayer film for sunroof glass and the sunroof glass provided by this utility model can effectively absorb ultraviolet rays in the full wavelength range (280nm-400nm) of sunlight, especially the high ultraviolet rays (390nm-400nm), by setting an interlayer film on the surface of the liquid crystal film of the sunroof glass. This effectively protects the liquid crystal film and avoids the aging of the liquid crystal film and other polymer films in the sunroof glass.

[0020] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This diagram illustrates a high ultraviolet absorption skylight glass intermediate film structure according to an embodiment of the present invention.

[0023] Figure 2 This diagram illustrates a high ultraviolet absorption interlayer film structure for a skylight glass according to another embodiment of the present invention.

[0024] Figure 3 This invention provides a schematic diagram of the three-layer intermediate film structure for a high ultraviolet absorption skylight glass.

[0025] Figure 4 This diagram shows a skylight glass structure according to the present invention;

[0026] In the picture:

[0027] 1. First surface layer; 2. Intermediate layer; 3. Second surface layer; 10. First glass; 20. Intermediate film; 30. Liquid crystal film; 40. Adhesive film; 50. Second glass. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0030] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0031] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] Please see Figure 1-2 A high ultraviolet absorption interlayer for skylight glass, the interlayer having a multi-layer composite structure, the interlayer including at least one sound insulation layer and at least one ultraviolet absorption layer; at least one of the ultraviolet absorption layers is configured to absorb ultraviolet rays in the wavelength range of 280nm-400nm;

[0033] At least one of the sound-insulating layers and at least one of the ultraviolet-absorbing layers are not located in the same layer, or one of the sound-insulating layers and one of the ultraviolet-absorbing layers are located in the same layer. It is understood that at least one sound-insulating layer and at least one ultraviolet-absorbing layer are separate layers, or the sound-insulating layer and the ultraviolet-absorbing layer are the same layer, that is, one or more layers of the interlayer film simultaneously serve the purpose of sound insulation and ultraviolet absorption.

[0034] Specifically, the interlayer is made of thermoplastic resin film, and each layer is a thermoplastic resin layer. The sound insulation layer is formed by adding sound-insulating powder to the thermoplastic resin layer, and the ultraviolet absorption layer is formed by adding ultraviolet absorbers to the thermoplastic resin layer. A single ultraviolet absorption layer is formed by adding multiple (at least two) ultraviolet absorbers to the thermoplastic resin layer; a layer with two or more ultraviolet absorption layers is formed by adding multiple different ultraviolet absorbers to the corresponding thermoplastic resin layers to form multiple ultraviolet absorption layers, thereby allowing different ultraviolet absorption layers to absorb ultraviolet rays in different wavelength ranges.

[0035] Example 1, please refer to Figure 1 A high ultraviolet absorption interlayer for skylight glass has a 5-layer structure, including an outer surface layer, two ultraviolet absorption layers, one sound insulation layer, and an inner surface layer. The sound insulation layer is located in the middle, the two ultraviolet absorption layers are located on opposite sides of the sound insulation layer along the thickness direction, and the outer surface layer and the inner surface layer are located on the outer side of the two ultraviolet absorption layers, respectively.

[0036] Example 2, please refer to Figure 2 A high-UV-absorbing interlayer for skylight glass is described. The interlayer has a five-layer structure, with three layers each for sound insulation and UV absorption. All three middle layers effectively provide sound insulation and UV absorption. The difference lies in the UV wavelength range absorbed by the three middle layers.

[0037] In one specific embodiment, please refer to Figure 3 The intermediate membrane has a three-layer structure, comprising a first surface layer 1, an intermediate layer 2, and a second surface layer 3 stacked sequentially. One or more of the first surface layer 1, the intermediate layer 2, and the second surface layer 3 are configured as the sound insulation layer, and one or more of the first surface layer 1, the intermediate layer 2, and the second surface layer 3 are configured as the ultraviolet absorption layer.

[0038] Example 3, please refer to Figure 3The interlayer has a three-layer composite structure. The intermediate layer 2 is used as a sound insulation layer. The first surface layer 1, intermediate layer 2, and second surface layer 3 are all ultraviolet (UV) absorption layers, specifically designated as the first, second, and third UV absorption layers, respectively. These layers are configured to absorb UV light in different wavelength ranges. It is understood that the UV wavelengths in sunlight range from 280nm to 400nm. The first UV absorption layer absorbs UV light in the 280nm-350nm range, the second in the 350nm-390nm range, and the third in the 390nm-400nm range. Each layer absorbs a different wavelength band, with the 280nm-400nm range being absorbed progressively, resulting in excellent absorption performance.

[0039] Example 4, similar to Example 3, also features a three-layer intermediate film structure. However, unlike Example 3, it has one sound-insulating layer and two ultraviolet (UV) absorbing layers. The intermediate layer 2 is configured as the sound-insulating layer, and the first surface layer 1 and the second surface layer 3 are configured as the fourth and fifth UV absorbing layers, respectively. These layers are designed to absorb UV light in different wavelength ranges. It is understood that the UV wavelengths in sunlight are 280nm-400nm, the fourth UV absorbing layer absorbs UV light in the 280nm-3900nm wavelength range, and the fifth UV absorbing layer absorbs UV light in the 390nm-400nm wavelength range.

[0040] Example 5, similar to Example 3, also features a three-layer structure for the interlayer membrane. Both the sound-insulating layer and the ultraviolet-absorbing layer are single layers, and the two layers are the same. The intermediate layer 2 is configured as the sound-insulating layer and also as the ultraviolet-absorbing layer, specifically designed to absorb ultraviolet light with wavelengths between 280nm and 400nm. It is understood that the intermediate layer serves to both insulate against sound and absorb ultraviolet light in the 280nm-400nm range.

[0041] In one specific implementation, the thickness ratio of the first surface layer 1, the intermediate layer 2 and the second surface layer 3 is (1-5):(1-5):(1-5).

[0042] In one specific embodiment, the sum of the thicknesses of the first surface layer 1 and the second surface layer 3 is 80%-120% of the thickness of the intermediate layer 2, and the thickness of the first surface layer 1 is 80%-120% of the thickness of the second surface layer 2. Specifically, the thickness of the first surface layer is the same as or approximately the same as the thickness of the second surface layer. Due to the influence of manufacturing processes and equipment, there may be some error in the thickness, but the difference between the two thicknesses should not exceed 20%. Similarly, the sum of the thicknesses of the first and second surface layers is the same as or approximately the same as the thickness of the intermediate layer. Due to errors in the manufacturing process of each layer, the thickness difference should not exceed 20%.

[0043] In one specific embodiment, the sound insulation layer is a sound-insulating polyvinyl alcohol acetal resin layer, the ultraviolet absorption layer is an ultraviolet-absorbing polyvinyl alcohol acetal resin layer, and the intermediate film is a polyvinyl alcohol acetal resin film. Preferably, the sound insulation layer is a sound-insulating PVB layer, and the ultraviolet absorption layer is an ultraviolet-absorbing PVB layer. It can be understood that the intermediate film is entirely a PVB film, the sound insulation layer achieves its sound insulation effect by adding sound-insulating powder to it, and the ultraviolet absorption layer achieves its ultraviolet absorption effect by adding ultraviolet absorbers to it. In Example 3, the intermediate layer is formed by adding sound-insulating powder to PVB, and then adding different ultraviolet absorbers to PVB to form a first ultraviolet absorption layer, a second ultraviolet absorption layer, and a third ultraviolet absorption layer; the type, ratio, and preparation process of the sound-insulating powder or ultraviolet absorber added to each layer (the ultraviolet absorber can be different types of ultraviolet absorbers produced by BASF to achieve the purpose of each ultraviolet absorption layer absorbing ultraviolet rays of different wavelengths) are all prepared using existing technologies and will not be described in detail here.

[0044] The following is a specific embodiment of an automotive sunroof glass according to this utility model.

[0045] An automotive sunroof glass includes a first glass 10, a high ultraviolet absorption interlayer film 20 for sunroof glass as described above, a liquid crystal film 30, an adhesive film 40, and a second glass 50, which are stacked sequentially. The adhesive film includes an EVA film or a polyvinyl acetal resin film. It should be noted that the adhesive film 40 is preferably a PVB film. The PVB film can be the PVB film commonly used in automotive laminated glass in the prior art, or it can be the high ultraviolet absorption interlayer film for sunroof glass provided by this invention.

[0046] In one specific embodiment, the sunroof glass includes an outer surface 101 and an inner surface 501. The outer surface 101 is disposed on one side close to the intermediate film 20 for sunroof glass with high ultraviolet absorption, and the inner surface 501 is disposed on the other side away from the intermediate film 20 for sunroof glass with high ultraviolet absorption. The outer surface 101 of the sunroof glass faces the direction of sunlight.

[0047] The above description is only an exemplary embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An interlayer film for skylight glass with high ultraviolet absorption, characterized in that, The intermediate film has a multi-layer composite structure, including at least one sound-insulating layer and at least one ultraviolet-absorbing layer; at least one of the ultraviolet-absorbing layers is configured to absorb ultraviolet light in the wavelength range of 280nm-400nm. At least one of the sound insulation layers and at least one of the ultraviolet absorption layers are not located in the same layer, or one or more of the sound insulation layers and one or more of the ultraviolet absorption layers are located in the same layer; The intermediate membrane is a three-layer composite structure, comprising a first surface layer (1), an intermediate layer (2), and a second surface layer (3) stacked sequentially. The intermediate layer (2) is configured as a sound insulation layer. The first surface layer (1), the intermediate layer (2) and the second surface layer (3) are respectively configured as a first ultraviolet absorption layer, a second ultraviolet absorption layer and a third ultraviolet absorption layer. The first ultraviolet absorption layer, the second ultraviolet absorption layer and the third ultraviolet absorption layer are configured to absorb ultraviolet rays in different wavelength ranges.

2. The high ultraviolet absorbing interlayer for use in sunroofs according to claim 1, characterized in that, The thickness ratio of the first surface layer (1), the intermediate layer (2) and the second surface layer (3) is (1~5):(1~5):(1~5).

3. The high ultraviolet absorbing interlayer for use in sunroofs according to claim 2, characterized in that, The sum of the thickness of the first surface layer (1) and the thickness of the second surface layer (3) is 80%-120% of the thickness of the intermediate layer (2), and the thickness of the first surface layer (1) is 80%-120% of the thickness of the second surface layer (3).

4. The high ultraviolet absorbing interlayer for use in sunroofs according to claim 1, characterized in that, The sound insulation layer is a sound-insulating polyvinyl acetal resin layer, the ultraviolet absorption layer is an ultraviolet-absorbing polyvinyl acetal resin layer, and the intermediate film is a polyvinyl acetal resin film.

5. An automotive sunroof glass characterized by, The skylight glass comprises a first glass (10), an intermediate film (20) for skylight glass with high ultraviolet absorption as described in any one of claims 1-4, a liquid crystal film (30), an adhesive film (40), and a second glass (50) stacked sequentially; wherein the adhesive film comprises an EVA film or a polyvinyl acetal resin film.

6. An automotive glazing according to claim 5, wherein, The skylight glass includes an outer surface (101) and an inner surface (501). The outer surface (101) is located on one side close to the intermediate film (20) for skylight glass with high ultraviolet absorption, and the inner surface (501) is located on the other side away from the intermediate film (20) for skylight glass with high ultraviolet absorption. The outer surface (101) of the skylight glass faces the direction of sunlight.

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