CN116520607A - Photo-aging-resistant adjustable light polymer disperse dye liquid crystal backdrop glass - Google Patents

Photo-aging-resistant adjustable light polymer disperse dye liquid crystal backdrop glass Download PDF

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Publication number
CN116520607A
CN116520607A CN202310444669.9A CN202310444669A CN116520607A CN 116520607 A CN116520607 A CN 116520607A CN 202310444669 A CN202310444669 A CN 202310444669A CN 116520607 A CN116520607 A CN 116520607A
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CN
China
Prior art keywords
layer
liquid crystal
disperse dye
dye liquid
glass
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Pending
Application number
CN202310444669.9A
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Chinese (zh)
Inventor
李民
王磊
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Shanghai HIUV Applied Materials Technology Co Ltd
Shanghai HIUV New Materials Co Ltd
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Shanghai HIUV Applied Materials Technology Co Ltd
Shanghai HIUV New Materials Co Ltd
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Priority to CN202310444669.9A priority Critical patent/CN116520607A/en
Publication of CN116520607A publication Critical patent/CN116520607A/en
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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
    • B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
    • 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
    • B60J3/00—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles
    • B60J3/04—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles adjustable in transparency
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

Abstract

The invention provides photo-aging resistant polymer disperse dye liquid crystal dimmable automobile sky screen glass. The light aging resistant adjustable light polymer disperse dye liquid crystal backdrop glass has the light transmittance of the off state visible light of the adjustable light area within the range of 0.1-12 percent; the on-state visible light transmittance is in the range of 1-60%. The on-state visible light transmittance of the polymer disperse dye liquid crystal dimming element layer is in the range of 3-70%; the light transmittance of the polymer dispersed dye liquid crystal element can be achieved by adding a dichroic dye to the liquid crystal composition, and the polymer dispersed dye liquid crystal element is made to exhibit different colors. The light aging resistance is realized through the integral design of the automotive awning glass.

Description

Photo-aging-resistant adjustable light polymer disperse dye liquid crystal backdrop glass
Technical Field
The invention relates to the field of dimming glass for automobiles, in particular to light aging-resistant dimming polymer disperse dye liquid crystal sky curtain glass.
Background
With the continuous development of the automobile industry, the service performance of the automobile awning glass is also receiving more and more attention. In the running process of an automobile, the optical performance of the sky screen glass has very important influence on the heat insulation performance, the privacy performance and the visual sense of a driver. Accordingly, the overall optical properties of automotive roof glass are becoming more and more interesting.
The optical performance indexes of the sky curtain glass mainly comprise: visible light transmittance: the light transmittance of the awning glass for visible light generally refers to the proportion of light rays in the wavelength range of 400-700nm transmitted through the awning glass, and the higher the visible light transmittance is, the easier the light rays are transmitted through, and the brighter the interior of the automobile is. Ultraviolet resistance: generally refers to the ability of the awning glass to resist ultraviolet rays in a wavelength range of less than 400nm, and good awning glass can effectively filter ultraviolet rays, protect passengers in a vehicle and prevent ultraviolet rays from being damaged. Thermal insulation performance: refers to the heat conduction blocking capability and the cooling effect of the sky curtain glass, and is mainly characterized in that the blocking rate of the sky curtain glass to infrared rays in the wavelength range of 900-2500nm is adopted. The good awning glass can effectively keep the temperature in the vehicle, improve the comfort level in the vehicle and save the energy consumption of the air conditioner in the vehicle. Reflectivity: refers to the light reflecting capacity of the awning glass. The good awning glass can reflect part of sunlight, resist the interference of strong light on a vehicle and reduce the sun exposure.
At present, the dimming function of the automotive awning glass mainly comprises the following realization modes: one is to provide a reflective layer on a glass substrate, and the other is to use dark glass, and in order to realize privacy function, polymer disperse dye liquid crystal is used in the sky curtain glass to realize the switching between light transmission and light non-transmission states.
The method for arranging the silver layer on the glass substrate is mainly magnetron sputtering. It is used as an infrared reflective coating to reduce the heat radiation of sunlight to the interior space of an automobile and thereby improve thermal comfort. Since silver layers are prone to corrosion, typically silver-containing layers are applied to the built-in side of the glass sheet so that they do not come into contact with the atmosphere, however, the outer and inner glass layers are typically filled with an adhesive polymer, such as PVB, EVA, SGP glue film, and contact of the silver layer with the adhesive layer still results in rapid decomposition of the silver layer; in addition, when the silver layer is disposed on the exposed surface of the vehicle, the silver layer is susceptible to mechanical damage such as scratches. And most of the awning glass is 3D glass, and the problem of high production cost exists due to the fact that the reflecting layer is arranged on the glass.
The use of dark glass results in a small dimming range and a high production cost of dark glass.
The PDLC is used for the automobile skylight, so that the privacy function can be realized, the function of adjusting the color and the light transmittance of the skylight can be realized by adding the dichroic dye into the liquid crystal, and the light aging resistance of the skylight can be influenced by adding the dye.
Therefore, an assembly scheme of the automotive awning glass is required to be provided, so that the automotive awning glass has the characteristics of large dimming range and light aging resistance.
Disclosure of Invention
The invention provides photo-aging-resistant adjustable light polymer disperse dye liquid crystal backdrop glass, which is prepared from the following components in percentage by weight: the light modulation device comprises a first glass layer (1), a first EVA adhesive film layer (2), a polymer disperse dye liquid crystal light modulation element layer (3), a second EVA adhesive film layer (4) and a second glass layer (5), wherein the polymer disperse dye liquid crystal light modulation element layer comprises an outer substrate layer (31), a polymer dye disperse liquid crystal layer (32) with the on-state visible light transmittance within the range of 3-70% and an inner substrate layer (33), and is characterized in that:
(a) The light-adjustable polymer disperse dye liquid crystal automobile backdrop has the off-state visible light transmittance within the range of 0.1-12%; the on-state visible light transmittance is in the range of 1-60%; the photo aging resistance index Δb is less than 2.0.
(b) The outer substrate layer (31) of the polymer disperse dye liquid crystal dimming element layer comprises a PET layer (311), a metal silver layer (312) and a transparent conductive layer (313) which are sequentially arranged from top to bottom;
(c) The inner substrate layer (32) of the polymer disperse dye liquid crystal dimming element layer comprises a transparent conductive layer (321) and a PET layer (322) which are sequentially arranged from top to bottom;
further, the metallic silver layer (312) has a thickness in the range of 1-500nm.
Further, the metallic silver layer (312) is of a single-layer structure, and has a thickness in the range of 1-12 nm.
Further, the metallic silver layer (312) is a multi-layer silver structure, a single silver layer has a thickness in the range of 1-12nm, and a spacer layer is arranged between adjacent silver layers.
Further, the metallic silver layer (312) is a double-layer silver structure, the thickness of a single silver layer is in the range of 1-12nm, and a spacing layer is arranged between adjacent silver layers.
Further, the metallic silver layer (312) is of a three-layer silver structure, a single silver layer has a thickness in the range of 1-12nm, and a spacer layer is arranged between adjacent silver layers.
Further, the spacer layer is selected from oxide, nitride or oxynitride of at least one of Zn, ti, si, al, sn, se, zr, ni, in, cr, W, Y, nb, cu, sm, and the thickness of the spacer layer is 1-500nm.
Further, the transparent conductive layer (313, 331) has a thickness of 10-500nm. One or more transparent conductive oxides such as Indium Tin Oxide (ITO), zinc oxide (ZnO), aluminum gallium indium tin oxide (AlGaInSnO), aluminum Zinc Oxide (AZO), tin oxide (SnO 2), indium oxide (In 2O 3), zinc tin oxide (SnZnO) and the like are selected.
And one side of the transparent conductive layer far away from the substrate layer is provided with a silicon oxide breakdown preventing layer.
Further, the lower surface of the PET layer is close to the upper surface of the metal silver layer, and the lower surface of the metal silver layer is close to the upper surface of the transparent conductive layer.
Further, the PET layer has a surface treatment layer. The surface treatment may be a treatment for generating functional groups by oxidizing the film surface, such as corona discharge treatment, plasma treatment, or flame treatment, or an adhesion enhancing layer may be provided by coating, sputtering, or the like, and the enhancing layer may be made of a metal oxide, a non-metal oxide, a polymer, or the like.
Further, the polymer disperse dye liquid crystal dimming element layer comprises a black spacer.
Further, the polymer disperse dye liquid crystal dimming element layer contains 0.1-10% of anthraquinone dichroic dye mixture.
Further, the first glass layer (1) and the second glass layer (5) have a visible light transmittance of more than 15%, and may or may not have a color such as gray, green, brown, blue, or the like.
Further, the thickness range of the first EVA adhesive film layer (2) is between 0.1 and 1mm, and the ultraviolet blocking rate of the sky curtain glass in the wavelength range of 280-380nm is more than 95% by adding an ultraviolet absorber into the adhesive film.
Further, the VA content in the first EVA adhesive film layer (2) is not less than 18%, and the haze is less than 2.5%.
Further, the thickness of the second EVA adhesive film layer (4) ranges from 0.1mm to 1mm, and the infrared blocking rate of the sky curtain glass in the wavelength range of 900-25000nm is more than 50% by adding the infrared absorbing agent into the adhesive film; the pigment is added into the adhesive film, so that the visible light transmittance of the sky curtain glass is adjusted.
Further, the VA content in the second EVA adhesive film layer (4) is not less than 18%, and the haze is less than 2.5%.
In summary, the present application includes at least one of the following beneficial technical effects:
1) The silver layer is arranged between the PET layer and the transparent conductive layer of the polymer disperse dye liquid crystal element, rather than on the inner surface of glass, so that the durability of the silver layer is improved. Particularly, the silver layer can be arranged on the surface of the PET in a magnetron sputtering mode, and the PET is a flexible material, so that roll-to-roll production can be realized, the production efficiency is improved, and the production cost is reduced.
2) The thickness and arrangement mode of the single silver layer in the metal silver layer and the spacing layer are set, so that the effect of balancing the relation between visible light transmittance and infrared reflection performance is achieved.
3) And the visual effect of the automotive sky curtain glass is adjusted by adjusting the light transmittance of the polymer disperse dye liquid crystal element (3) and the second EVA adhesive film layer.
4) And the characteristic of good aging resistance of the whole automobile sky curtain glass is realized by selecting the liquid crystal, the type and the addition amount of the dye.
Drawings
FIG. 1 is a schematic cross-sectional view of a light aging resistant dimmable polymer disperse dye liquid crystal backdrop glass as described herein.
Detailed Description
The present application is further described below in conjunction with fig. 1.
The embodiment of the application discloses a light aging-resistant light-adjustable polymer disperse dye liquid crystal backdrop glass. In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
Photo aging resistance: the method is carried out according to the method specified in GB T5137.3-2002 test method for automobile safety glass.
Optical properties: the method is carried out according to the method specified in GB/T5137.2-2002 'test method for optical Properties of automotive safety glass'.
Haze detection: the EVA adhesive film is cut into sheets with the thickness of 100 multiplied by 100mm, the haze of the dimming glass is measured by using a haze tester according to GB/T2410-2008, and the haze is measured by electrifying with the electrifying voltage of 48V and the electrifying voltage of 2A.
Example 1
The light aging resistant, tunable polymeric disperse dye liquid crystal backdrop glass of this embodiment comprises:
the first glass layer (1) is neutral 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The first EVA adhesive film layer (2) is an ultraviolet blocking EVA adhesive film with the thickness of 0.1mm, the VA content is 28%, the visible light transmittance is 90%, the ultraviolet blocking rate is 95%, and the haze is 0.5%.
The PET layer in the outer substrate layer (31) of the polymer disperse dye liquid crystal light adjusting element layer has a thickness of 20 microns, a 5nm silicon dioxide tackifying layer and a silver layer are arranged to be single-layer silver, the thickness is 1nm, the transparent conductive layer is ITO, and the thickness is 10nm.
A colorless spacer having a D90 of 10 μm was used in the polymer disperse dye liquid crystal layer (32), and 0.1% of an anthraquinone dichroic dye was added to the polymer disperse dye liquid crystal layer.
The PET layer in the inner substrate layer (33) was 20 μm thick, a 5nm silica adhesion promoting layer was provided, and the transparent conductive layer was ITO and had a thickness of 10nm.
The total thickness of the polymer disperse dye liquid crystal dimming element layer is 50 microns, and the on-state visible light transmittance is 70% and the off-state visible light transmittance is 17%.
The second EVA adhesive film layer (4) is an infrared blocking EVA adhesive film with the thickness of 0.1mm, the VA content is 28%, the visible light transmittance is 90%, the infrared blocking rate is 50%, and the haze is 0.5%.
The second glass layer (5) is neutral 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The off-state visible light transmittance of the glass of the automotive awning in the embodiment is 12%; the on-state visible light transmittance is 60%, and the photo aging resistance index delta b is 1.6.
Example 2
The light aging resistant, tunable polymeric disperse dye liquid crystal backdrop glass of this embodiment comprises:
the first glass layer (1) is gray 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 80%.
The first EVA adhesive film layer is an ultraviolet blocking EVA adhesive film with the thickness of 1mm, the visible light transmittance is 88%, the ultraviolet blocking rate is 99%, the VA content is 18%, and the haze is 0.8%.
The PET layer (311) in the outer substrate layer (31) of the polymer disperse dye liquid crystal dimming element layer has a thickness of 250 micrometers, and the silver layer (312) has a three-layer structure, and is formed by sequentially and alternately laminating silver with a thickness of 12nm, ITO with a thickness of 500nm and silver with a thickness of 12nm, and the transparent conductive layer (313) is ITO with a thickness of 500nm.
A black spacer having a D90 of 30 μm is used in the polymer dispersed dye liquid crystal layer (32), and 5% of a dichroic dye is added to the polymer dispersed dye liquid crystal.
The PET layer (332) in the inner substrate layer (33) was 250 μm thick, and the transparent conductive layer (331) was ITO 500nm thick.
The total thickness of the polymer disperse dye liquid crystal dimming element is 530 microns, and the on-state visible light transmittance is 35% and the off-state visible light transmittance is 3%.
The second EVA adhesive film layer is an infrared blocking EVA adhesive film with the thickness of 1mm, the VA content is 18%, the visible light transmittance is 5%, the infrared blocking rate is 90%, and the haze is 2.5%.
The second glass layer (5) is green 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 90%.
The off-state visible light transmittance of the adjustable light area of the automobile backdrop in the embodiment is 0.1%; the on-state visible light transmittance was 1%. The photo aging resistance index Δb was 1.0.
Example 3
The light aging resistant, tunable polymeric disperse dye liquid crystal backdrop glass of this embodiment comprises:
the first glass layer (1) is neutral 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The first EVA adhesive film layer is an ultraviolet blocking EVA adhesive film with the thickness of 0.76mm, the VA content is 25%, the visible light transmittance is 89%, the ultraviolet blocking rate is 95%, and the haze is 0.6%.
The PET layer (311) in the outer substrate layer (31) of the polymer disperse dye liquid crystal light adjusting element layer has a thickness of 188 micrometers, the silver layer (312) has a six-layer structure, the transparent conductive layer is formed by sequentially and alternately laminating silicon dioxide with a thickness of 500nm, silver with a thickness of 8nm, ITO with a thickness of 60nm, silver with a thickness of 3nm, ITO with a thickness of 70nm and silver with a thickness of 8nm, and the transparent conductive layer (313) is ITO with a thickness of 300 nm.
A black spacer having a D90 of 30 μm is used in the polymer dispersed dye liquid crystal layer (32), and 10% of a dichroic dye is added to the polymer dispersed dye liquid crystal.
The PET layer (331) in the inner substrate layer (33) is 188 μm thick, and the transparent conductive layer (332) is ITO 300nm thick.
The total thickness of the polymer disperse dye liquid crystal dimming element layer is 400 microns, the on-state visible light transmittance is 1%, and the off-state visible light transmittance is 0.3%.
The second EVA adhesive film layer is an infrared blocking EVA adhesive film with the thickness of 0.76mm, the VA content is 25%, the visible light transmittance is 50%, the infrared blocking rate is 87%, and the haze is 1.5%.
The second glass layer (5) is neutral 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The off-state visible light transmittance of the adjustable light area of the automobile backdrop in the embodiment is 0.3%; the transmittance of the on-state visible light is 1%; the photo aging resistance index Δb was 1.9.
Example 4
The light aging resistant, tunable polymeric disperse dye liquid crystal backdrop glass of this embodiment comprises:
the first glass layer (1) is colorless 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The first EVA adhesive film layer is an ultraviolet blocking EVA adhesive film with the thickness of 0.38mm, the VA content is 30%, the visible light transmittance is 91%, the ultraviolet blocking rate is 99%, and the haze is 0.4%.
The PET layer (311) in the outer substrate layer (31) of the polymer disperse dye liquid crystal dimming element layer is 50 microns thick, a 5nm silicon dioxide tackifying layer is arranged, the silver layer (312) is of a four-layer structure, and is formed by sequentially and alternately laminating 5nm silicon dioxide, 5nm silver, 60nm ITO and 5nm silver, and the transparent conductive layer (313) is an ITO layer with the thickness of 100nm.
A black spacer having a D90 of 20 μm is used in the polymer disperse dye liquid crystal layer (32), and 2% of an anthraquinone dichroic dye is added to the polymer disperse dye liquid crystal layer.
The PET layer (331) in the inner substrate layer (33) was 50 μm thick, a 5nm silica adhesion promoting layer was provided, and the transparent conductive layer (332) was ITO and had a thickness of 100nm.
The total thickness of the polymer disperse dye liquid crystal dimming element is 130 micrometers, the on-state visible light transmittance is 60%, and the off-state visible light transmittance is 9%.
The second EVA adhesive film layer is an infrared blocking EVA adhesive film with the thickness of 0.38mm, the VA content is 30%, the visible light transmittance is 30%, the infrared blocking rate is 82%, and the haze is 1.6%.
The second glass layer (5) is neutral 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The off-state visible light transmittance of the adjustable light area of the automobile backdrop in the embodiment is 2%; the on-state visible light transmittance is 13%. The photo aging resistance index Δb was 0.7.
Example 5
The light aging resistant, tunable polymeric disperse dye liquid crystal backdrop glass of this embodiment comprises:
the first glass layer (1) is colorless 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The first EVA adhesive film layer is an ultraviolet blocking EVA adhesive film with the thickness of 0.52mm, the VA content is 28%, the visible light transmittance is 90%, the ultraviolet blocking rate is 99%, and the haze is 0.5%.
The PET layer and the silver layer in the outer substrate layer (31) of the polymer disperse dye liquid crystal dimming element layer have four-layer structures, and are respectively formed by sequentially and alternately laminating silicon dioxide with the thickness of 20nm, silver with the thickness of 8nm, ITO with the thickness of 60nm and silver with the thickness of 8nm, and transparent conductive layers ITO with the thickness of 150nm, silicon dioxide breakdown preventing layers with the thickness of 20nm.
A black spacer having a D90 of 20 μm is used in the polymer dispersed dye liquid crystal layer (32), and 3% of an anthraquinone dichroic dye is added to the polymer dispersed dye liquid crystal.
The PET layer (331) in the inner substrate layer (33) was 100 μm thick, and the transparent conductive layer (332) was ITO and 125nm thick.
The total thickness of the polymer dispersed liquid crystal dimming element is 270 micrometers, and the on-state visible light transmittance is 20% and the off-state visible light transmittance is 10%.
The second EVA adhesive film layer is an infrared blocking EVA adhesive film with the thickness of 0.52mm, the VA content is 28%, the visible light transmittance is 70%, the infrared blocking rate is 52%, and the haze is 1.0%.
The second glass layer (5) is neutral 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The off-state visible light transmittance of the adjustable light area of the automobile backdrop in the embodiment is 5%; the on-state visible light transmittance is 10%. The photo aging resistance index Δb was 1.4.
Example 6
The light aging resistant, tunable polymeric disperse dye liquid crystal backdrop glass of this embodiment comprises:
the first glass layer (1) is colorless 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 15%.
The first EVA adhesive film layer is an ultraviolet blocking EVA adhesive film with the thickness of 0.52mm, the VA content is 28%, the visible light transmittance is 90%, the ultraviolet blocking rate is 99%, and the haze is 0.5%.
The PET layer and the silver layer in the outer substrate layer (31) of the polymer disperse dye liquid crystal light adjusting element layer have four-layer structures, and are respectively formed by sequentially and alternately laminating silicon dioxide with the thickness of 1nm, silver with the thickness of 8nm, ITO with the thickness of 60nm and silver with the thickness of 5nm, and transparent conductive layers ITO with the thickness of 150nm.
A black spacer having a D90 of 20 μm was used in the polymer dispersed dye liquid crystal layer (32), and 0.1% of an anthraquinone dichroic dye was added to the polymer dispersed dye liquid crystal layer.
The PET layer (331) in the inner substrate layer (33) was 100 μm thick, and the transparent conductive layer (332) was ITO and 125nm thick.
The total thickness of the polymer dispersed liquid crystal dimming element is 270 micrometers, and the on-state visible light transmittance of the polymer dispersed liquid crystal dimming element is 70% and the off-state visible light transmittance of the polymer dispersed liquid crystal dimming element is 50%.
The second EVA adhesive film layer is an infrared blocking EVA adhesive film with the thickness of 0.52mm, the VA content is 28%, the visible light transmittance is 90%, the infrared blocking rate is 30%, and the haze is 1.0%.
The second glass layer (5) is neutral 3D curved glass with the thickness of 2.1mm, and the visible light transmittance is 93%.
The off-state visible light transmittance of the adjustable light area of the automobile backdrop in the embodiment is 7%; the on-state visible light transmittance is 10%. The photo aging resistance index Δb was 1.7.

Claims (19)

1. A light aging resistant dimmable polymeric disperse dye liquid crystal backdrop glass, said backdrop glass comprising:
a first glass layer (1), a first EVA adhesive film layer (2), a polymer disperse dye liquid crystal dimming element layer (3) with the on-state visible light transmittance in the range of 3-70%, a second EVA adhesive film layer (4),
The second glass layer (5) is composed, and the polymer disperse dye liquid crystal dimming element layer comprises an outer substrate layer (31), a polymer dye disperse liquid crystal layer (32) and an inner substrate layer (33), and is characterized in that:
(a) The light-adjustable polymer disperse dye liquid crystal automobile backdrop has the off-state visible light transmittance within the range of 0.1-12%; the on-state visible light transmittance is in the range of 1-60%; the photo aging resistance index delta b is less than 2.0;
(b) The outer substrate layer (31) of the polymer disperse dye liquid crystal dimming element layer comprises a PET layer (311), a metal silver layer (312) and a transparent conductive layer (313) which are sequentially arranged from top to bottom;
(c) The inner substrate layer (32) of the polymer disperse dye liquid crystal dimming element layer comprises a transparent conductive layer (321) and a PET layer (322) which are sequentially and adjacently arranged from top to bottom.
2. The photoaging-resistant, tunable optical polymer disperse dye liquid crystal glazing of claim 1, wherein the metallic silver layer (312) has a thickness in the range of 1-500nm.
3. The photoaging-resistant, tunable optical polymer disperse dye liquid crystal backdrop glass of claim 2, wherein the metallic silver layer is a single layer structure having a thickness in the range of 1-12 nm.
4. The photoaging-resistant, tunable, polymeric disperse dye liquid crystal backdrop glass according to claim 2, wherein the metallic silver layer is a multi-layer silver structure having a single silver layer thickness of 1-
In the range of 12nm, a spacer layer is arranged between adjacent silver layers.
5. The photoaging-resistant, tunable optical polymer disperse dye liquid crystal backdrop glass according to claim 4, wherein the metallic silver layer has a double silver structure, and a single silver layer thickness of 1-
In the range of 12nm, a spacer layer is arranged between adjacent silver layers.
6. The photoaging-resistant, tunable optical polymer disperse dye liquid crystal backdrop glass according to claim 4, wherein the metallic silver layer has a three-layer silver structure, and a single silver layer thickness of 1-
In the range of 12nm, a spacer layer is arranged between adjacent silver layers.
7. The photoaging-resistant tunable polymeric disperse dye liquid crystal backdrop glass according to claim 4, wherein the spacer layer is selected from the group consisting of oxide, nitride, and oxynitride of at least one of Zn, ti, si, al, sn, se, zr, ni, in, cr, W, Y, nb, cu, sm, and the spacer layer has a thickness of 1-500nm.
8. The photoaging resistant, tunable optical polymer disperse dye liquid crystal glazing of claim 1, wherein the lower surface of the PET layer is immediately adjacent to the upper surface of the metallic silver layer, and the lower surface of the metallic silver layer is immediately adjacent to the upper surface of the transparent conductive layer.
9. The photoaging resistant, tunable polymeric disperse dye liquid crystal glazing of claim 1, wherein the PET layer has a thickness of 20 to 250 microns.
10. The photoaging resistant, tunable optical polymer disperse dye liquid crystal glazing of claim 9, wherein the PET layer has a surface treatment layer.
11. The photoaging-resistant, tunable optical polymer disperse dye liquid crystal glazing of claim 1, wherein the transparent conductive layer has a thickness of 10-500nm.
12. The photoaging-resistant tunable polymeric disperse dye liquid crystal glazing of claim 1, wherein the transparent conductive layer is provided with a silica breakdown preventing layer on a side thereof remote from the substrate layer.
13. The photoaging-resistant adjustable polymeric disperse dye liquid crystal glazing according to claim 1, wherein the polymeric disperse dye liquid crystal dimming element layer comprises 0.1-10% of anthraquinone-based dichroic dye mixture.
14. The photoaging-resistant tunable polymeric disperse dye liquid crystal glazing of claim 1, wherein the polymeric disperse dye liquid crystal light modulation element layer comprises black spacers.
15. The photo-aging resistant dimmable polymer disperse dye liquid crystal backdrop glass according to claim 1, wherein the visible light transmittance of the first glass layer (1) and the second glass layer (5) is more than 15%.
16. The photo-aging resistant tunable polymeric disperse dye liquid crystal backdrop glass of claim 1, wherein the first EVA film layer (2) has a thickness in the range of 0.1-1mm and an ultraviolet blocking ratio of greater than 95% for wavelengths in the range of 280-380 nm.
17. The first EVA film layer (2) according to claim 12, wherein the VA content in the EVA film is not less than 18% and the haze is less than 2.5%.
18. The photo-aging resistant tunable polymeric disperse dye liquid crystal backdrop glass of claim 1, wherein the second EVA film layer (4) has a thickness in the range of 0.1-1mm and a light transmittance in the wavelength range of 400-700nm of 5-90%.
19. The second EVA film layer (4) according to claim 14, wherein the VA content of the EVA film is not less than 18% and the haze is less than 2.5%.
CN202310444669.9A 2023-04-23 2023-04-23 Photo-aging-resistant adjustable light polymer disperse dye liquid crystal backdrop glass Pending CN116520607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310444669.9A CN116520607A (en) 2023-04-23 2023-04-23 Photo-aging-resistant adjustable light polymer disperse dye liquid crystal backdrop glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310444669.9A CN116520607A (en) 2023-04-23 2023-04-23 Photo-aging-resistant adjustable light polymer disperse dye liquid crystal backdrop glass

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CN116520607A true CN116520607A (en) 2023-08-01

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