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WO2024092524A1 - Film noir adhésif pour structure de fenêtre de couvercle de lidar - Google Patents

Film noir adhésif pour structure de fenêtre de couvercle de lidar Download PDF

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Publication number
WO2024092524A1
WO2024092524A1 PCT/CN2022/129079 CN2022129079W WO2024092524A1 WO 2024092524 A1 WO2024092524 A1 WO 2024092524A1 CN 2022129079 W CN2022129079 W CN 2022129079W WO 2024092524 A1 WO2024092524 A1 WO 2024092524A1
Authority
WO
WIPO (PCT)
Prior art keywords
black
adhesion film
glass
cover window
polymer
Prior art date
Application number
PCT/CN2022/129079
Other languages
English (en)
Inventor
Wenbo Zhang
Xiangyan MA
Original Assignee
Materion Precision Optics (Shanghai) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Materion Precision Optics (Shanghai) Limited filed Critical Materion Precision Optics (Shanghai) Limited
Priority to PCT/CN2022/129079 priority Critical patent/WO2024092524A1/fr
Publication of WO2024092524A1 publication Critical patent/WO2024092524A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
    • G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
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    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
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    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • B32B17/10449—Wavelength selective transmission
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
    • C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
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    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
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    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
    • B32B17/10825—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts
    • B32B17/10834—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid
    • B32B17/10844—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid
    • B32B17/10853—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid the membrane being bag-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/41—Opaque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/737—Dimensions, e.g. volume or area
    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • C03C2217/44—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the composition of the continuous phase
    • C03C2217/445—Organic continuous phases
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
    • C03C2217/48—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase having a specific function
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
    • C03C2217/48—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase having a specific function
    • C03C2217/485—Pigments

Definitions

  • LIDAR is used in the field of driverless vehicles (i.e., autonomous vehicles) and robots through its use in control systems and navigation systems.
  • LIDAR an acronym for “light detection and ranging” or “laser imaging, detection, and ranging”
  • LIDAR is an active measuring system for measuring the precise distance between objects and sensors by emitting laser and measuring the time for the reflected light to return to a transceiver.
  • a transceiver array composed of a laser and a detector, combined with beam scanning, LIDAR can perceive the human environment in real time and obtain the accurate distance and contour information about surrounding objects.
  • the positioning accuracy of LIDAR can reach the order of centimetre, which provides a technical basis for autonomous navigation.
  • LIDAR cover glass window In addition to optical performance, the LIDAR cover glass window is required to have the same level of anti-environmental impact ability as the front windshield and anti-electromagnetic interference ability in a complex electromagnetic environment.
  • LIDAR cover glass window structures often require complex structures and complex alignment of each layer, the use of unreliable adhesive to secure layers together, and susceptibility to cracking and yellowing over time all of which effectively reduce laser detection and negatively impact LIDAR performance.
  • the black adhesion film may comprise: a polymer; a black dyestuff; and a light diffusing agent.
  • the polymer, the black dyestuff, and the light diffusing agent are main constituents of the black adhesion film.
  • the amount of the polymer, the black dyestuff, and the light diffusing agent in the black adhesion film is defined by a relative weight relationship of the polymer, the black dyestuff, and the light diffusing agent with respect to each other, wherein the black adhesion film comprises 100g of polymer, between 4g to 10g of black dyestuff, and between 3g and 15 grams of light diffusing agent.
  • the LIDAR cover window structure may comprise a first glass layers stack; a second glass layers stack; and a black adhesion film.
  • the black adhesion film is disposed between the first glass layers stack and the second glass layers stack, wherein the black adhesion film is IR transmissive.
  • the black adhesive film may comprise a polymer, a black dyestuff, and a light diffusing agent, wherein the polymer, the black dyestuff, and the light diffusing agent are main constituents of the black adhesion film.
  • the method may comprise cutting a first glass layers stack, a second glass layers stack, and a black adhesion film to a specified size; stacking, the first glass layers stack, the black adhesion film, and the second glass layers stack such that the black adhesion film is disposed between the first glass layers stack and the second glass layers stack; and aligning the first glass layers stack, the black adhesion film, and the second glass layers stack along their respective edge to make the lamination structure, the lamination structure comprising laminated glass.
  • the method may further comprise prefixing by adhesive the edge of the laminated glass and pressing the laminated glass with a roller at least once. Additionally, the method comprises curing, at elevated temperature, the laminated glass at vacuum in either an autoclave or a vacuum package; and trimming the adhesive from the edge of the laminated glass after cooling the laminated glass to room temperature.
  • FIGURE 1 is a cross-sectional view illustrating an example embodiment of a LIDAR cover window that includes a black adhesion film with high infrared (IR) transmission in accordance with this disclosure.
  • IR infrared
  • FIGURES 2A through 2B are cross-sectional views of components of the LIDAR cover window structure shown in FIGURE 1.
  • FIGURE 2A is a cross-sectional view of the first glass layers stack comprising part of the LIDAR cover window structure shown in FIGURE 1.
  • FIGURE 2B is a cross-sectional view of the second glass layers stack comprising part of the LIDAR cover window structure shown in FIGURE 1.
  • FIGURE 3 is a schematic flow diagram illustrating an example implementation of an exemplary method for manufacturing a LIDAR cover window with black adhesion film as shown in FIGURE 1.
  • FIGURE 4 is a schematic flow diagram illustrating an example implementation of another exemplary method for manufacturing a LIDAR cover window with black adhesion film as shown in FIGURE 1.
  • FIGURE 5 is a flow diagram illustrating an example implementation of an exemplary method for making the black adhesion film with high IR transmission in accordance with this disclosure.
  • the terms “comprise (s) , “ “include (s) , “ “having, “ “has, “ “can, “ “contain (s) , “ and variants thereof, as used herein, are intended to be open-ended transitional phrases, terms, or words that require the presence of the named ingredients/steps and permit the presence of other ingredients/steps.
  • such description should be construed as also describing compositions or processes as “consisting of” and “consisting essentially of the enumerated ingredients/steps, which allows the presence of only the named ingredients/steps, along with any unavoidable impurities that might result therefrom, and excludes other ingredients/steps.
  • a composition for a black adhesion film with high infrared (IR) transmission and the application of the black adhesion film in a LIDAR cover window in another aspect of this disclosure there is provided a method for forming the black adhesion film composition and a method of manufacturing a compact lamination structure comprising the black adhesion film which can be used in a LIDAR cover window.
  • IR infrared
  • the black adhesion film may comprise at least one polymer, at least one black dyestuff with IR transmission, and at least one light diffusing agent. It is to be appreciated that the composition of the black adhesion film may be configured to permit the black adhesion film to be transmissive over the IR spectrum range from about 900nm -1600nm. As an example, the composition of the black adhesion film may be configured to permit the black adhesion film to be transmissive through the near-infrared (NIR) and short-wave infrared (SWIR) light wavelengths and to be non-transmissive to visible (VIS) light.
  • NIR near-infrared
  • SWIR short-wave infrared
  • the black adhesion film can be included in a LIDAR cover window by lamination thereby simplifying the LIDAR cover window structure by reducing the number of layers, reducing the high-cost and material usage, and improving the reliability of the resulting LIDAR cover window under tough environmental conditions.
  • a LIDAR device There are two objectives when constructing a LIDAR device. First, is to construct a LIDAR cover window that is highly transmissive to save the laser emission energy and collect more energy reflected by the object. Second, in order to hide the internal structure of the LIDAR device, the cover window generally needs to display black colour in order to block the visible light.
  • the LIDAR cover window 100 may comprise a first glass layers stack 110, a black adhesion film 120, and a second glass layers stack 130 arranged in sequence with the black adhesion film 120 disposed between (e.g., sandwiched between) the first glass layers stack 110 and the second glass layers stack 130.
  • the black adhesion film 120 may comprise one or more layers.
  • the first glass layers stack 110 and/or the second glass layers stack 130 may comprise a stack consisting of a single layer or of a plurality of layers.
  • the first glass layers stack 110 may include a first non-coating surface 112 and the second glass layers stack 130 may include a second non-coating surface 132 which faces the first non-coating surface 112.
  • the first and second non-coating surfaces 112 and 132 do not include an optical coating.
  • the first non-coating surface 112 of the first glass layers stack 110 and the second non-coating surface 132 of the second glass layers stack 130 may be laminated by the black adhesion film 120 having high IR transmission, as described in more detail below.
  • the black adhesion film 120 may comprise at least one polymer, at least one black dyestuff with IR transmission, and at least one light diffusing agent.
  • the black adhesion film 120 is characterized as having high IR transmission.
  • the black adhesion film 120 can provide IR transmission of more than 93%when the angle of incident light is 0°, which is the case of normal incidence.
  • the at least one polymer, the at least one black dyestuff, and the at least one light diffusing agent are the main constituents of the composition which forms the black adhesion film 120 with high IR transmission.
  • the black adhesion film 120 may include one or more additional constituents in addition to the main constituents.
  • the black adhesion film 120 may further comprise one or more of: a coupling agent, a crosslinker, an initiator, an antioxidant, a light stabilizer, a heat stabilizer, and a tackifier.
  • the LIDAR cover window 100 of FIGURE 1 which comprises the first glass layers stack 110, the second glass layers stack 130, and the black adhesion film 120 sandwiched between the first glass layers stack 110 and the second glass layers stack 130, can be used in the automotive market, especially in the field of driverless vehicles and robotics.
  • the black adhesion film 120 may replace existing 3-layer structures consisting of: adhesive layer + black film layer + adhesive layer, by acting as an adhesive and thereby eliminating the need for the two separate adhesive layers.
  • the composition of the black adhesion film 120 may be configured to promote the black adhesion film, which is disposed between the first and second glass layers stacks 110 and 130, to serve as an adhesive and bond to, and between, the first and second glass layers stacks 110 and 130.
  • the black adhesion film 120 of the LIDAR cover window 100 may be transmissive for infrared (IR) light, thereby allowing IR light to pass therethrough, while being non-transmissive for visible (VIS) light, thereby blocking VIS light, and all the while bonding the first and second glass layers stacks 110 and 130 as the adhesive layer between the first and second glass layers stacks 110 and 130.
  • IR infrared
  • VIS visible
  • the black adhesion film 120 disclosed herein avoids the reliability concerns associated with using a separate UV adhesive which may shrink from an edge of the LIDAR cover window structure after more than 150H in a combination trial of 85°C /85RH%and salt fog.
  • the number of layers in a LIDAR cover window lamination structure can be reduced from 5-layers to 3-layers on the basis of this disclosure.
  • the resulting 3-layer structure can comprise the first glass layers stack 110, the black adhesion film 120, and the second glass layers stack 130 arranged as shown in FIGURE 1. Reducing the number of layers in the LIDAR cover window structure reduces the size of the LIDAR cover window and provides for a more compact LIDAR cover window structure.
  • the black adhesion film described herein provides for a simpler LIDAR cover window structure that is also more compact and reduces the costs of manufacturing a LIDAR cover window by 70% (for adhesive bonding in the 5-layer structure) or 30% (for lamination structures currently on the market) .
  • transmissivity at near-infrared (NIR) and short-wave infrared (SWIR) of the 3-layer LIDAR cover window structure disclosed herein is about 93%-95%, whereas transmissivity at VIS light is lower than about 3%.
  • FIGURE 2A is a cross-sectional view of the first glass layers stack 110 that comprises part of the LIDAR cover window structure shown in FIGURE 1.
  • the first glass layers stack 110 may comprise a stack consisting of a single layer or a plurality of layers.
  • the first glass layers stack 110 may comprise a first glass layer 114 and at least one of an anti-reflective (AR) coating or an oleophobic coating.
  • the first glass layer 114 may have a thickness from about 0.5mm -7mm and, in some embodiments, between 0.1mm -7mm.
  • the first glass layer 114 may be made of general silica glass, float glass, and/or other various strengthened glasses.
  • the first glass layers stack 110 may comprise a first glass layer 114, an AR coating 116, and an oleophobic coating 118 arranged in sequence with the AR coating 116 disposed between (e.g., sandwiched between) the first glass layer 114 and the oleophobic coating 118.
  • the AR coating 116 may include a general AR coating and/or a hard AR coating.
  • the oleophobic coating 118 may have a contact angle greater than 110°.
  • the black adhesion film 120 may have a thickness between about 0.05mm -1mm and, in some embodiments, between 0.1mm -1mm.
  • the exact thickness of the black adhesion film 120 may be at least partly based on the thickness and/or material of the first glass layer 114 of the first glass layers stack 110 such that different first glass layers stacks 110 are configured to match with different black adhesion films 120.
  • the black adhesion film 120 has a thickness of about 0.2mm -0.3mm which is less than or equal to 1/10 the thickness of the first glass layer 114.
  • a ratio of the thickness of the black adhesion film 120 to the thickness of the first glass layer 114 is in a range of between 1/20 and 1/10.
  • FIGURE 2B is a cross-sectional view of the second glass layers stack 130 that comprises part of the LIDAR cover window structure shown in FIGURE 1.
  • the second glass layers stack 130 may comprise a stack consisting of a single layer or a plurality of layers.
  • the second glass layers stack 130 may comprise a second glass layer 134 and at least one of an anti-reflective (AR) coating or a conductive layer.
  • the second glass layer 134 may have a thickness from about 0.5mm -7mm and, in some embodiments, between 0.1mm -7mm.
  • the second glass layer 134 may be made of general silica glass, float glass, and/or other various strengthened glasses.
  • the second glass layers stack 130 may comprise a second glass layer 134, a conductive layer 136, and an AR coating 138 arranged in sequence with the conductive layer 136 disposed between (e.g., sandwiched between) the second glass layer 134 and the AR coating 138.
  • the AR coating 116 may include a general AR coating and/or a hard AR coating.
  • the conductive layer 136 may comprise a conductive film.
  • the conductive layer 136 may comprise, but is not limited to, indium tix oxide (ITO) , indium zinc oxide (IZO) , and aluminum-doped zinc oxide (AZO) . It is to be appreciated that the conductive layer 136 is an optional layer and, in some embodiments, may not be present.
  • a laminated glass structure can be achieved by using an autoclave and, in the other implementation, a laminated glass structure can be achieved by using a laminated vacuum package (or laminated vacuum bag) . It is to be appreciated that the two processes for manufacturing the laminated glass structure of this disclosure offers manufacturing flexibility.
  • FIGURE 3 is a schematic flow diagram illustrating an example implementation of an exemplary method 300 for manufacturing a LIDAR cover window with black adhesion film, as shown in FIGURES 1-2B.
  • an autoclave may be used.
  • the glass layers and the black adhesion film may be cut to a specified size.
  • the glass layers may comprise a first glass layers stack (e.g., 110 in FIGURES 1, 2A) and a second glass layers stack (e.g., 130 in FIGURES 1, 2B) similar to those described above with respect to FIGURES 1-2B.
  • the black adhesion film (e.g., 120 in FIGURE 1) may be of a similar thickness and composition to that described above with respect to FIGURES 1-2B.
  • a cutting tool 312 may be used to cut the glass layers and the black adhesion film. In some implementations, the cutting is performed using IR transmission.
  • the glass layers and the black adhesion film are stacked and aligned to make a laminated glass.
  • Assembly tooling 322 may be used to stack and orientate the glass layers and black adhesion film.
  • assembly tooling 322 may be used to receive and orientate the first glass layers stack (e.g., 110 in FIGURES 1, 2A) .
  • the black adhesion film e.g., 120 in FIGURE 1
  • the second glass layers stack e.g., 130 in FIGURES 1, 2B
  • an edge of the first glass layers stack, an edge of the black adhesion film, and an edge of the second glass layers stack are aligned to make the laminated glass.
  • the laminated glass 332 may be prefixed by adhesive 334, such as tape and/or glue, at the edge of the laminated glass 332.
  • the laminated glass 332 may be pressed with a roller 342 at least once.
  • the laminated glass 332 is pressed with a roller 342 more than two (2) times.
  • the roller 342 exerts a predetermined amount of pressure on the laminated glass 332 and has a predefined scroll speed.
  • the roller 342 exerts a pressure on the laminated glass 332 between about 0.15MPa -0.2MPa.
  • the roller 342 has a scroll speed of about 50RPM -250RPM.
  • the laminated glass 332 may be sent to the autoclave 352, in particular the autoclave chamber, for curing.
  • the autoclave 352 may have predefined curing parameters that are initiated at specific stages in the curing process/sequence.
  • the curing process may commence by first evacuating the autoclave chamber to a vacuum pressure of less than 1mbar without heating for about 10 minutes to 20 minutes.
  • the autoclave chamber may be heated to 80°C -100°C for about 20 minutes to 40 minutes while maintaining the vacuum pressure at about 0.09MPa -0.1Mpa.
  • the autoclave chamber may continue to be heated to a temperature of about 110°C -140°C and this temperature may be maintained for about 20 minutes to 40 minutes. Finally, the temperature of the autoclave chamber may be reduced to room temperature for a period of 20 minutes to 60 minutes after which the pressure may be relieved.
  • the cured laminated glass 332 may be removed from the autoclave 352 once the temperature has reached room temperature (e.g., about 25°C) . Then, the residual adhesive 334, such as glue and/or tape, along the edge of the laminated glass 332 may be trimmed/removed.
  • room temperature e.g., about 25°C
  • FIGURE 4 is a schematic flow diagram illustrating an example implementation of another exemplary method 400 for manufacturing a LIDAR cover window with black adhesion film, as shown in FIGURES 1-2B.
  • a silicone vacuum bag or vacuum package may be used instead of an autoclave.
  • the glass layers and the black adhesion film may be cut to a specified size.
  • the glass layers may comprise a first glass layers stack (e.g., 110 in FIGURES 1, 2A) and a second glass layers stack (e.g., 130 in FIGURES 1, 2B) similar to those described above with respect to FIGURES 1-2B.
  • the black adhesion film (e.g., 120 in FIGURE 1) may be of a similar thickness and composition to that described above with respect to FIGURES 1-2B.
  • a cutting tool 412 may be used to cut the glass layers and the black adhesion film. In some implementations, the cutting is performed using IR transmission.
  • the glass layers and the black adhesion film are stacked and aligned to make a laminated glass.
  • Assembly tooling 422 may be used to stack and orientate the glass layers and black adhesion film.
  • assembly tooling 422 may be used to receive and orientate the first glass layers stack (e.g., 110 in FIGURES 1, 2A) .
  • the black adhesion film e.g., 120 in FIGURE 1
  • the second glass layers stack e.g., 130 in FIGURES 1, 2B
  • an edge of the first glass layers stack, an edge of the black adhesion film, and an edge of the second glass layers stack are aligned to make the laminated glass.
  • the laminated glass 432 may be prefixed by adhesive 434, such as tape and/or glue, at the edge of the laminated glass 432.
  • the laminated glass 432 may be pressed with a roller 442 at least once. In some non-limiting examples, the laminated glass 432 is pressed with a roller 442 more than two (2) times.
  • the roller 442 exerts a predetermined amount of pressure on the laminated glass 432 and has a predefined scroll speed. In some implementations, the roller 442 exerts a pressure on the laminated glass 432 between about 0.15MPa -0.2MPa. In some implementations, the roller 442 has a scroll speed of about 50RPM -250RPM.
  • the laminated glass 432 may be sent to a vacuum bag 452, which is then placed in an oven 454, for curing.
  • the vacuum bag 452 used for curing may be made of silicone.
  • the laminated glass 432 may be placed in the silicone vacuum bag 452 to cure in an oven 454 according to predefined curing parameters that are initiated at specific stages in the curing process/sequence.
  • the curing process may commence by first evacuating the vacuum bag 452 to a vacuum pressure of less than 1mbar.
  • the vacuum bag 452, such as a silicone vacuum bag may be evacuated via an external vacuum pump (not shown) . The evacuation process may be performed without heating for about 10 minutes to 20 minutes.
  • the oven 454 and, by extension, the vacuum bag 452 within said oven 454 may be heated to about 70°C -80°C by introducing incremental temperature increases, or heat ramp ups, of 1°C -2°C/minute. Once the temperature reaches about 70°C -80°C, the temperature may be maintained at about 70°C -80°C for about 30 minutes to 50 minutes. Then, the oven 454 and, by extension, the vacuum bag 452 may continue to be heated to a temperature of about 110°C -140°C and this temperature may be maintained for about 20 minutes to 40 minutes.
  • the temperature of the oven 454 and, by extension, the temperature of the vacuum bag 452 may be reduced to room temperature (e.g., about 25°C) by introducing incremental temperature decreases, or heat ramp downs, of 1°C -2°C/minute. Finally, the pressure may be relieved.
  • room temperature e.g., about 25°C
  • the cured laminated glass 432 may be removed from the oven 454 and vacuum bag 452 once the temperature has reached room temperature (e.g., about 25°C) . Then, the residual adhesive 434, such as glue and/or tape, along the edge of the laminated glass 432 may be trimmed/removed.
  • room temperature e.g., about 25°C
  • the black adhesion film with high IR transmission may comprise at least one polymer, at least one black dyestuff with IR transmission, and at least one light diffusing agent.
  • the at least one polymer, the at least one black dyestuff, and the at least one light diffusing agent are the main constituents of the composition that forms the black adhesion film with high IR transmission.
  • the black adhesion film may consist essentially of the main constituents.
  • the black adhesion film may be formed from a composition comprising about 100g of polymer, between about 4g -10g of black dyestuff with IR transmission, and between about 3g -15g of light diffusing agent.
  • the black adhesion film may be formed from a composition comprising about 100g of polymer, about 5g of black dyestuff with IR transmission, and about 5g of light diffusing agent.
  • Table 1 below shows the weight or weight range of each constituent that makes up of the black adhesion film. It is to be appreciated that these amounts can be scaled up or scaled down as long as the relative weight relationships between the constituents are maintained.
  • the polymer of the black adhesion film generally possesses certain characteristics, or features, that make the polymer particularly suitable for integration into the composition for making the black adhesion film with high IR transmission.
  • a first characteristic of the polymer is that the polymer may be processed by the thermal curing process of lamination at temperatures ranging from 100°C -150°C.
  • a second characteristic of the polymer is that the polymer may provide more than 91%transmission at visible (VIS) and short-wave infrared (SWIR) wavelengths after thermal curing.
  • a third characteristic of the polymer is that the polymer may have a heat resistance of greater than 105°C. It is to be appreciated that the polymer is capable of withstanding moderately high temperatures.
  • a fourth characteristic of the polymer is that the polymer may have a degree of crosslinking that exceeds at least 50%.
  • any suitable polymer, or combination of polymers may be selected that has the aforementioned characteristics and that is capable of effecting/providing the beneficial technical effects described herein.
  • the polymer may comprise ethylene-vinyl acetate copolymer (EVA) , ethylene-methyl methacrylate copolymer, ethylene-octene copolymer, ethylene-pentene copolymer, polyvinyl butyral (PVB) , or any combination thereof.
  • EVA ethylene-vinyl acetate copolymer
  • PVB polyvinyl butyral
  • the polymer may further include about 20%-40%plasticizer in PVB resin.
  • the polymer may comprise PVB and include a plasticizer content in PVB of about 30%.
  • the plasticizer can be triethylene glycol (TGE) and oxalic acid.
  • the main component of the black adhesion film is a polymer with high IR transmission and high heat resistance.
  • the black adhesion film can include polymer that renders the black adhesion film highly transmissive for IR light but non-transmissive (e.g., blocks) for VIS light.
  • the black dyestuff with IR transmission of the black adhesion film generally possesses certain characteristics, or features, that make the black dyestuff particularly suitable for integration into the composition to make the black adhesion film that provides high IR transmission.
  • the black dyestuff is responsible for the black color (i.e., appearance) of the black adhesion film.
  • Any suitable black dyestuff, or combination of black dyestuffs may be selected that has the aforementioned characteristics and that is capable of effecting/providing the beneficial technical effects described herein.
  • the black dyestuff may comprise carbon black, nigrosine, perylene dyestuff, copper chromite black pigment, or any combination thereof in which the black dyestuffs can be mixed in any proportion.
  • the black dyestuff may have a particle size between about 0.5 ⁇ m -20 ⁇ m.
  • the black dyestuff may have a particle size between about 2 ⁇ m -5 ⁇ m.
  • the light diffusing agent may include, but is not limited to, micro/nano calcium fluoride, micro/nano magnesium fluoride, micro/nano quartz, micro/nano low melting point glass powder, fumed silica, titanium dioxide (TiO 2 ) , aluminum oxide (Al 2 O 3 ) . It is to be appreciated that some of the light diffusing agents are present as a mixture of different sized particles characterized by micro-particles and nano-particles. In some embodiments, the light diffusing agent may have a particle size between about 1 ⁇ m -50 ⁇ m. As an example, the light diffusing agent may have a particle size between about 5 ⁇ m -10 ⁇ m.
  • the black adhesion film may comprise one or more additional constituents in addition to the main constituents, which comprise the polymer, the black dyestuff, and the light diffusing agent.
  • the black adhesion film with high IR transmission may further comprise one or more of: a coupling agent, a crosslinker, an initiator, an antioxidant, a light stabilizer, a heat stabilizer, and a tackifier.
  • the black adhesion film may be formed from a composition comprising the following (in terms of relative proportions) : about 100g of main constituents comprising a polymer, black dyestuff with IR transmission and light diffusing agent; between about 0.1g -1.0g of coupling agent; between about 0.3g -2.0g of crosslinker; between about 0.2g -0.8g of initiator; between about 0.5g -5g of antioxidant; between about 0.1g -2g of light stabilizer; between about 0.1g -2g of heat stabilizer; and between about 0.05g -0.4g of tackifier.
  • the black adhesion film may be formed from a composition comprising the following: about 100g of main constituents including a polymer, a black dyestuff and a light diffusing agent; about 0.5g of coupling agent; about 1.5g of crosslinker; about 0.4g of initiator; about 1.5g of antioxidant; about 0.8g of light stabilizer; about 0.8g of heat stabilizer; and about 0.1g of tackifier.
  • Table 2 shows the weight or weight range of various constituent that may be present in the composition of the black adhesion film. It is to be appreciated that these amounts can be scaled up or scaled down as long as the relative weight relationships between the constituents is maintained.
  • Material Amount/Weight Example Composition Main Constituents 100g 100g Coupling Agent 0.1g -1.0g 0.5g Crosslinker 0.3g -2.0g 1.5g Initiator 0.2g -0.8g 0.4g Antioxidant 0.5g -5g 1.5g Light Stabilizer 0.1g -2g 0.8g Heat Stabilizer 0.1g -2g 0.8g Tackifier 0.05g -0.4g 0.1g
  • the coupling agent may include, but is not limited to, silane coupling agent, titanates, and aluminates.
  • the coupling agent comprises a silane coupling agent including, but not limited to, vinyl trimethoxysilane, methacryloxysilane, aminopropyl triethoxysilane, vinyl trimethoxysilane prepolymer, or any combination thereof in which the coupling agents can be mixed in any proportion.
  • the crosslinker may comprise a peroxide with good thermal stability.
  • a crosslinker with good thermal stability may be defined as having a half-life temperature from about 90°C -130°C.
  • the free radicals may have higher activity after decomposition which may match the melt process of ethylene-vinyl acetate copolymer (EVA) .
  • the peroxide crosslinker may include, but is not limited to, alkyl dipropyl carbonate (DPC) , benzoyl peroxide (BPO) , peroxide ketal, trimethylolpropane triacrylate (TMPTA) , Triallyl isocyanate (TAIC) , pentaerythritol triacrylate (PETA) , isopropyl methacrylate, ethoxylated trimethylolpropane triacrylate (ETPTA) , isooctyl acrylate, or any combination thereof in which the crosslinkers can be mixed in any proportion.
  • DPC alkyl dipropyl carbonate
  • BPO benzoyl peroxide
  • TMPTA trimethylolpropane triacrylate
  • TMPTA trimethylolpropane triacrylate
  • TAIC triallyl isocyanate
  • PETA pentaerythritol triacrylate
  • ETPTA isopropyl meth
  • the initiator may comprise a peroxide initiator.
  • the peroxide initiator may include, but is not limited to, one or more of tert-butyl peroxybenzoate (TBPB) ; 1, 1-di- (tert-butylperoxy) -3, 3, 5-trimethylcyclohexane (TMCH) ; diisopropyl peroxydicarbonate; tert-butylperoxy-2-ethylhexylcarbonate (TBEC) ; benzoyl peroxide (BPO) ; cumene hydroperoxide (CMHP) ; tert-butyl hydroperoxide (TBHP) ; tert-amyl 2-ethylhexanoate (TAPO) ; 1, 3-bis (tert-butylperoxy isopropyl) benz
  • the antioxidant may comprise hindered phenolic antioxidants.
  • the hindered phenolic antioxidant may include, but is not limited to, one or more of pentaerythritol esters, n-octadecanol propionate esters, phosphorous esters, and thioesters.
  • the hindered phenolic antioxidants comprise antioxidant 1010 or antioxidant 1790 from HT/T 3713- 2010 which is the Chemical Industry Standard of the People's Republic of China.
  • Antioxidant 1010 is pentaerythritol tetrakis 3- (3, 5-ditert-butyl-4-hydroxyphenyl) propionate.
  • the molecular formula of antioxidant 1010 is C 73 H 108 O 12 .
  • Antioxidant 1790 is tris (4-tert-butyl-3-hydroxy-2, 6-dimethyl-benzyl) .
  • the molecular formula of antioxidant 1790 is C 42 H 57 N 3 O 6 .
  • the light stabilizer may comprise hindered amine antioxidants.
  • the light stabilizer may include, but is not limited to, one or more of bis (1, 2, 2, 6, 6-pentamethyl-4-piperidyl) sebacate, bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, and 3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzoicacihexadecylester.
  • any suitable heat stabilizer, or combination of heat stabilizers may be selected that is capable of effecting/providing the beneficial operation described herein.
  • the heat stabilizer may include, but is not limited to, a fatty acid soap and a metal soap such as a calcium, zinc and/or barium metal soap, one or more of which are mixed in any proportion.
  • tackifier Any suitable tackifier, or combination of tackifiers, may be selected that is capable of effecting/providing the beneficial operation described herein.
  • the tackifier may include, but is not limited to, limited terpene resin, terpene phenolic resin, polyresin, and hydrogenated rosin one or more of which are mixed in any proportion.
  • the composition of the black adhesion film can be configured to provide for high IR transmission and to block visible (VIS) light.
  • the black adhesion film 120 incorporated in the LIDAR window 100 may be transmissive for infrared (IR) light, thereby allowing IR light to pass therethrough, while being non-transmissive for visible (VIS) light, thereby blocking the VIS light.
  • IR infrared
  • VIS visible
  • the black adhesion film will not be as susceptible to the yellowing under sunlight as optical materials that are generally transparent.
  • the composition of the black adhesion film may be configured to provide for a heat resistance between about 40°C -105°C.
  • the black adhesion film 120 may be formed from a composition comprising a polymer elastomer which advantageously may cushion the impact of from a stone collision, thereby mitigating the likelihood of chipping. In effect, the impact resistance is improved by the elasticity of the polymer film.
  • the black adhesive film comprises a polymer such as PVB, EVA, infrared penetrant, black dyestuff, and a coupling agent.
  • FIGURE 5 is a flow diagram illustrating an example implementation of an exemplary method for making the black adhesion film with high IR transmission.
  • the exemplary method 500 begins at 502.
  • the method comprises weighing the raw materials selected for inclusion in a mixture used to make the black adhesion film characterized by a high IR transmission. It is to be appreciated that the raw materials are the constituents of the composition which form the black adhesion film.
  • the black adhesion film has a composition comprising at least the main constituents.
  • the main constituents comprise at least a polymer, a black dyestuff, and a light diffusing agent.
  • weighing the raw materials may comprise weighing, in relative proportions, about 100g of polymer, between about 4g -10g of black dyestuff with IR transmission, and between about 3g -15g of light diffusing agent.
  • the weighing of raw materials comprises weighing about 100g of polymer, about 5g of black dyestuff, and about 5g of light diffusing agent.
  • the black adhesion film may comprise one or more additional constituents in addition to the main constituents.
  • the black adhesion film may further comprise one or more of: a coupling agent, a crosslinker, an initiator, an antioxidant, a light stabilizer, a heat stabilizer, and a tackifier.
  • weighing the raw materials may comprise weighing, in relative proportions, about 100g of main constituents including a polymer, black dyestuff with IR transmission and light diffusing agent, and one or more of the following: between about 0.1g -1.0g of coupling agent; between about 0.3g -2.0g of crosslinker; between about 0.2g -0.8g of initiator; between about 0.5g -5g of antioxidant; between about 0.1g -2g of light stabilizer; between about 0.1g -2g of heat stabilizer; and between about 0.05g -0.4g of tackifier.
  • the weighing of raw materials comprises weighing about 100g of main constituents including a polymer, black dyestuff with IR transmission and light diffusing agent; about 0.5g of coupling agent; about 1.5g of crosslinker; about 0.4g of initiator; about 1.5g of antioxidant; about 0.8g of light stabilizer; about 0.8g of heat stabilizer; and about 0.1g of tackifier.
  • the raw materials are combined and mixed to form a slurry of the black adhesion film.
  • the slurry may be added to an extruder equipment, for example the barrel of a double-screw extruder equipment.
  • the black adhesion film having a high IR transmission is formed by melt extrusion and tape casting process.
  • the extrusion temperature is controlled at a temperature between about 60°C and 150°C. It is to be appreciated that the extrusion processing temperature may be dependent on the polymer, or combination of polymers, present in the black adhesion film composition.
  • the black adhesion film is formed after cooling the black adhesion film composition at room temperature. It is to be appreciated that cooling the black adhesion film evenly at room temperature may mitigate damage to the black adhesion film such as, for example, warping and cracking. Having formed the black adhesion film, the exemplary method 500 ends at 512.
  • the terms “may” and “may be” indicate a possibility of an occurrence within a set of circumstances; a possession of a specified property, characteristic or function; and/or qualify another verb by expressing one or more of an ability, capability, or possibility associated with the qualified verb. Accordingly, usage of “may” and “may be” indicates that a modified term is apparently appropriate, capable, or suitable for an indicated capacity, function, or usage, while taking into account that in some circumstances the modified term may sometimes not be appropriate, capable, or suitable. For example, in some circumstances an event or capacity can be expected, while in other circumstances the event or capacity cannot occur –this distinction is captured by the terms “may” and “may be. ”

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Abstract

L'invention concerne une structure de fenêtre de couvercle de lidar (100). La structure de fenêtre de couvercle de lidar (100) comprend : un premier empilement de couches de verre (110) ; un second empilement de couches de verre (130) ; et un film noir adhésif (120). Le film noir adhésif (120) est placé entre le premier empilement de couches de verre (110) et le second empilement de couches de verre (130), le film noir adhésif (110) laissant passer les infrarouges. Le film noir adhésif (120) comprend en outre au moins un polymère, au moins un colorant noir et au moins un agent de diffusion de lumière, ledit au moins un polymère, ledit au moins un colorant noir et ledit au moins un agent de diffusion de lumière étant les principaux constituants du film noir adhésif (120).
PCT/CN2022/129079 2022-11-01 2022-11-01 Film noir adhésif pour structure de fenêtre de couvercle de lidar WO2024092524A1 (fr)

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PCT/CN2022/129079 WO2024092524A1 (fr) 2022-11-01 2022-11-01 Film noir adhésif pour structure de fenêtre de couvercle de lidar

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6366397B1 (en) * 2000-03-10 2002-04-02 Ntt Advanced Technology Corporation Infrared radiation reflector and infrared radiation transmitting composition
JP2012019138A (ja) * 2010-07-09 2012-01-26 Dainippon Printing Co Ltd 太陽電池モジュール用裏面保護シート
CN109891267A (zh) * 2016-10-28 2019-06-14 Ppg工业俄亥俄公司 用于增加近红外检测距离的涂层
CN113296358A (zh) * 2020-02-21 2021-08-24 东友精细化工有限公司 黑色感光性树脂组合物、黑矩阵及图像显示装置
CN113943537A (zh) * 2021-10-26 2022-01-18 常州斯威克光伏新材料有限公司 一种黑色高反复合封装胶膜及其制备方法
CN114502369A (zh) * 2019-10-11 2022-05-13 旭硝子欧洲玻璃公司 设置有层压保护层的激光雷达检测装置
CN115226396A (zh) * 2021-02-19 2022-10-21 法国圣戈班玻璃厂 层压窗玻璃、具有近红外视觉系统的相关设备

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6366397B1 (en) * 2000-03-10 2002-04-02 Ntt Advanced Technology Corporation Infrared radiation reflector and infrared radiation transmitting composition
JP2012019138A (ja) * 2010-07-09 2012-01-26 Dainippon Printing Co Ltd 太陽電池モジュール用裏面保護シート
CN109891267A (zh) * 2016-10-28 2019-06-14 Ppg工业俄亥俄公司 用于增加近红外检测距离的涂层
CN114502369A (zh) * 2019-10-11 2022-05-13 旭硝子欧洲玻璃公司 设置有层压保护层的激光雷达检测装置
CN113296358A (zh) * 2020-02-21 2021-08-24 东友精细化工有限公司 黑色感光性树脂组合物、黑矩阵及图像显示装置
CN115226396A (zh) * 2021-02-19 2022-10-21 法国圣戈班玻璃厂 层压窗玻璃、具有近红外视觉系统的相关设备
CN113943537A (zh) * 2021-10-26 2022-01-18 常州斯威克光伏新材料有限公司 一种黑色高反复合封装胶膜及其制备方法

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