WO2024251428A1 - Vitrage feuilleté dynamique - Google Patents

Vitrage feuilleté dynamique Download PDF

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Publication number
WO2024251428A1
WO2024251428A1 PCT/EP2024/061322 EP2024061322W WO2024251428A1 WO 2024251428 A1 WO2024251428 A1 WO 2024251428A1 EP 2024061322 W EP2024061322 W EP 2024061322W WO 2024251428 A1 WO2024251428 A1 WO 2024251428A1
Authority
WO
WIPO (PCT)
Prior art keywords
glazing
spacer means
functional film
laminated
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/061322
Other languages
English (en)
Inventor
Quentin Jensen
Stéphane Léonard
Shunsuke SADAKANE
Pierre HUYGHE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Glass Europe SA
Original Assignee
AGC Glass Europe SA
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 AGC Glass Europe SA filed Critical AGC Glass Europe SA
Publication of WO2024251428A1 publication Critical patent/WO2024251428A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/544—Torsion strength; Torsion stiffness
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • 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
    • B32B2419/00—Buildings or parts thereof
    • 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
    • B32B2457/00—Electrical equipment
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/206—Organic displays, e.g. OLED
    • 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
    • B32B2605/006—Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
    • 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

Definitions

  • the present invention relates to a laminated glazing, in particular a laminated glazing intended to be used as a dynamic glazing, more in particular a laminated glazing having a liquid crystal film laminated inside.
  • the invention is primarily intended to be used in production of automotive glazing but not limited to.
  • the present invention relates to any glazing comprising a functional film such as a liquid crystal film, in particular when said glazing is subject to, during its manufacture/assembly or its use, constraints, in particular in terms of heat treatments and/or pressure.
  • a functional film such as a liquid crystal film
  • such glazings are dynamic glazings that may be darkened at will, in particular electronically, in order to protect against the heat of the sun and glare.
  • smart windows can be darkened at will when the weather is sunny in order to prevent the passage of light into a room, or lightened when the weather is cloudy in order to once more maximize the passage of light or light from display in case the dynamic glazing comprises an integrated display.
  • the glazings are generally flat or have a low curvature.
  • glazings are for example used as the roofs, windshields, rear windows and side windows including the quarter-lites of vehicles as exterior glazings, or as the interior glazings such as the separation between the driver and the passenger part.
  • glazed roofs are increasingly being substituted for conventional roofs, which form part of the body of vehicles.
  • the choice of these roofs is the result of constructors offering to their customers this option, which makes a vehicle seem to open onto the exterior, like a convertible, without the disadvantages of convertibles, as these roofs maintain the comfort levels of a conventional sedan.
  • liquid or film adhesives are used to laminate a functional film and more particularly a pressure sensitive functional film into a laminated glazing as the bonding layer than the traditional PVB interlayer.
  • Such methods are described in the prior art, like the WO2022218953 describes gravity filling method, pressure filling method and vacuum filling method.
  • Such liquid adhesives are used as a bonding layer between the glass and the functional film.
  • the liquid adhesives used as the bonding layer in the lamination process are preferably suitable to be used in a glazing in terms of optical properties, i.e., the optical properties of the liquid adhesive to be used are matching to the optical properties of the glazing.
  • liquid crystal (LC) films as such other functional films intended to be used as switchable glazing are sensitive to pressure and temperature limiting consequently their use in automotive industry.
  • black spots which drive from inhomogeneous pressure during the assemble process may appear in laminated glazing comprising a such functional film leading to optical defects, transparency changing not working properly and thus, such an unaesthetic glazing refused generally by car manufacturers and the final customers.
  • the automotive designers are looking for using at least one of the automotive glazing as display.
  • laminating a display into a glazing is difficult due to properties of the functional films as they are extremely sensitive to high temperature and pressure.
  • the display may be combined with a switchable film to increase the light contrast while keeping a thermal comfort and/or privacy.
  • Mura effect also called as clouding or Yogore or black Mura
  • the transparency switchable glazings like the automotive glazings since because it is see-through, the user can easily see the defect.
  • W02022218953 describes a curved laminated glazing with a functional film and optical clear adhesives to fill between the functional film and the glazing. It describes different filling methods like gravity filling, pressure filling and vacuum filling.
  • EP369l892 describes a curved laminated glazing with a functional film, the functional film is adhered to the glazing surfaces by the help of a liquid adhesive.
  • WO2019198748 describes a glazing with a guest-host liquid crystal functional film
  • W02020003252 describes a switchable laminated glazing with liquid optical clear adhesives.
  • [OO18]CN115182669 disclose a protective layer for the functional film to be provided right next to the functional film in the lamination process to protect the functional film from external environment.
  • the goal of the present invention is to provide a laminated glazing with functional film preferably sensitive to pressure with good aesthetic to eliminate the aforementioned problems.
  • the present invention provides a laminated glazing with a functional film that may be integrated into a bent shape glazing, but not limited to. More specifically, the present invention provides a laminated glazing with a functional film preferably sensitive to pressure and temperature, laminated with an optical coupling material.
  • the present invention relates also to an automotive laminated glazing comprising a pressure sensitive functional film. According to the present invention, the glazing may also have a curvature.
  • the present invention concerns a laminated glazing, the glazing comprising at least: a. a first glass sheet having an outer (Pl) and an inner (P2) faces, b. a functional film, c. a second glass sheet having an inner (P3) and an outer (P4) faces, d. at least one optical coupling material for to be used as a bonding layer
  • the functional film is a guest-host liquid crystal film (GHLC) used as a dynamic transparency changing mechanism for the glazing.
  • GHLC guest-host liquid crystal film
  • the laminated glazing comprise at least two glass sheets, in different embodiments glazing may be include three or more glass sheets and more than one functional film.
  • the present invention concerns a spacer means provided at least partially around the periphery of the edge of the laminated glazing comprising at least: a. a first glass sheet having an outer (Pl) and an inner (P2) faces, b. at least one functional film, c. a second glass sheet having an inner (P3) and an outer (P4) faces, d.
  • the spacer means protects the functional film from the pressure applied externally to the edges of the glazing by absorbing and smoothing the force/pressure applied over the glazing, and preventing the pressure applied to the glazing edge not to be transmitted to the functional film, i.e., the spacer means acts as a support for the functional film and the glass sheets.
  • a functional film and particularly a functional film sensitive to pressure, and more particularly a switchable film such as a liquid crystals film may be used in a laminated glazing like a roof for automotive, a side window (lite), a rear fix for the vehicles which are subject to pressure during manufacturing or their use.
  • the spacer means absorbs/damps the pressure applied to the glazing by being soft and smooth and also hard enough to maintain glass sheets in position, therefore the applied pressure/force is diminished and not transferred to the functional film.
  • the spacer means in another aspect, may also be aligned with the external pressure means in the direction of applied force/ pressure that the distance between the external pressure/force and the spacer means is minimized, even became zero that no torque is applied to the glazing, therefore no pressure/force is transmitted to the functional film.
  • the two different phenomena may also be combined and that results a better protection of the functional film from applied external pressure.
  • the spacer means of the present invention results elimination/reduction in the pressure applied to the functional film laminated inside the glazing.
  • different spacers or sealants used in the glazings with functional film to maintain the glass sheets together or protecting the functional film from environmental effects none provides the support to the functional film as the spacer means of the present invention provides.
  • the spacer means of the present invention by extending to the glazing edge, i.e., by being close to glazing border and running along at least partially around periphery of the glazing, results prevention of transmission of the external pressure onto the functional film.
  • the glazing of the present invention may comprise the external pressure means integrated/fixed to the glazing.
  • the rear-fixes used in the automotive industry encapsulated with a frame, preferably from plastic material and the frame, itself applies pressure to the glazing.
  • the openable side windows used in automotive industry has a mounting apparatus or a holder means fixed to usually the bottom edge of the glazing, which applies a pressure to the glazing. Such means apply pressure to the glazing while they are installed onto the glazing and also during the use of the vehicle.
  • the spacer means of the present invention may be a part of the external pressure applying means that the external pressure applying means also keeps the glazing stable and prevents pressure/force being transmitted to the functional film.
  • the present invention takes advantage of such arrangement by integrating the spacer means into the external pressure applying means.
  • the spacer means of the present invention is hidden behind the black enamel print commonly used in automotive industry.
  • the aesthetics of the glazing is not compromised by the inclusion of the spacer means of the present invention.
  • Fig.l is a view of a vehicle with glazing.
  • Fig.2 is a schematic view of the laminated glazing accordingto one embodiment of the present invention.
  • Fig.3 to Fig. 8 is a schematic view of the laminated glazing according to different embodiments of the present invention.
  • constituent element e.g., a first constituent element
  • another constituent element e.g., a second constituent element
  • the constituent element may be directly connected to the another constituent element or may be connected to the another constituent element through another constituent element (e.g., a third constituent element).
  • a laminated glazing (1) comprising at least a first glass sheet (11) having an outer (Pl) and an inner (P2) faces, an electrically powered functional film (13), a second glass sheet (12) having an inner (P3) and an outer (P4) faces, at least one optical coupling material (14) provided between the said functional film (13) and the at least first (11) and/or the second (12) glass sheets, said functional film (13) laminated between the inner faces (P2, P3) of the glass sheets (11, 12).
  • the laminated glazing (1) of the present invention also comprises a spacer means (15) provided at least partially around the periphery of the glazing edge that protects the functional film (13) from the external pressure applied on the glazing (1).
  • the numbering of the glass sheets (11, 12) in the continuation of the description refers to the numbering nomenclature conventionally used for glazing (1).
  • the face of the laminated glass which is in contact with the environment external to the vehicle is known as being the face 1 (Pl) and the surface in contact with the internal medium, that is to say the passenger compartment of the vehicle, is known as face 4 (P4), the functional assembly according to the present invention being positioned between the faces 2 (P2) and 3 (P3), where it can be protected from damage.
  • first glass sheet (11) may have face 1 and face 2 or face 3 and face 4 of the glazing
  • second glass sheet may (12) have face 3 and face 4 or face 1 and face 2, respectively which means first glass sheet (11) may be used as external side of the glazing (1) or the internal side of the glazing (1).
  • the glass sheets (11, 12) may be a glass of soda-lime-silica, aluminosilicate or borosilicate type, and the like, the composition of the glazing (1) is not crucial for the purpose of the present invention.
  • the Fig.l shows a laminated automotive sidelite; the sidelite is intended to be fixed on the vehicle's body. It is understood that the invention is not limited to a sidelite and in another preferred embodiment of the present invention, the laminated glazing (1) can be used in any glazing for a vehicle (V) and in another preferred embodiment of the present invention, the laminated glazing (1) can be used in outside or inside of automotive industry, i.e., anywhere where a laminated glazing (1) is needed.
  • the glazing (1) as shown in Fig.2 as an embodiment of the present invention comprises an first sheet of glass (11) having an external surface (Pl) and an inner surface (P2), and a second sheet of glass (12) having an inner surface (P3) and an outer surface (P4).
  • Such glazing (1) is laminated.
  • the first sheet of glass (11) of the glazing (G) is that sheet in contact with the exterior of the vehicle.
  • the second sheet of glass (12) is that sheet in contact with the inner space of the vehicle.
  • the glazing (1) can be a triple glazing or any kind of glazing with at least two glass sheets (11,12).
  • the glazing (1) can also include more films (13) which are laminated inside.
  • the first and/or the second sheet of glass (11, 12) are bent in a previous step before providing a functional film (13) over at least one surface of the first and/or the second sheet of glass (11, 12), i.e., before the lamination process.
  • the curvature values of the first glass sheet (11) and the second glass sheet (12) are in line with each other, it has to be understood that the curvature values might not be the same.
  • the first glass sheet (11) has a low curvature and the second glass (12) is flat, this type of glazing (1) can also be counted curved glazing.
  • the glass sheets (11, 12) before the lamination may be totally or partially curved to reach the requested curvature of the final glazing (1) to correctly fit with the particular design of the glass support, as the shape required for the application.
  • the sizes of the two glass sheets (11, 12) may differ from each other, in common practice, the first glass sheet (11) with Pl and P2 surfaces is bigger than the second glass sheet (12) with P3 and P4 surfaces.
  • the curvature or the sizes of the glazing (1) is not crucial for the present invention.
  • the term “laminating” refers to a step of providing a layered structure in which the functional film (13) and more particularly the switchable film alone or in combination with another functional film (13), and one or more glass sheets (11, 12) are separated by an optical coupling material (14) acting as an adhesive interlayer extending across substantially the entire interface between the functional film (13) and the glass sheets (11, 12) facing the functional film (13).
  • the glazing (1) comprises a first glass sheet (11), a second glass sheet (12) and a pressure-sensitive preferably electrically powered functional film (13) in between the glass sheets (11, 12), and at least one optical coupling material (14), provided in contact with the functional film (13) and the inner surface (face 2 or face 3 as described above) of the first and/or second glass sheets (11, 12) to provide a bonding function.
  • the optical coupling material (14) is in contact with the functional film (13) to maintain a distance between the functional film (13) and the at least the first and/or the second glass sheet (11, 12). Achieving such configuration of the glass sheets (11, 12) with the functional film (13) may be accomplished in any method, the present invention is related to the spacer means (15) for protecting the functional film (13) from the external pressure applied.
  • optical coupling material (14) what is meant is either a “liquid adhesive” being a layer of polymerthat is polymerized or may cured from a liquid resin, or it is meant optical clear adhesives or optical clear resin or optical clear adhesive films.
  • the liquid adhesive is made from a liquid resin
  • the liquid resin is preferably chosen amongst acrylic resin, methacrylate resin, urethane resin, silicone resin, polyester resin, epoxy resin and polysulfide resin or a mix.
  • the liquid adhesive may be an optical resin, are before being applied in a viscous state and then it is called liquid optical coupling adhesive or LOCA.
  • the advantage of using optical clear resin is that it can cover the entire film surrounding regardless of glass shape or even if there is a mechanical pattern on the film (13).
  • the optical clear resin may be one classically used to manufacture LC displays (LCD), mainly resins having a refractive index close to glass, which are ranging in between 1.35 and 1.65.
  • Such optical clear resin is for example thermal cure type, high elongation silicone gel, silicone base, acrylic base, urethan base, epoxy base.
  • the optical clear resin preferably cures at lower temperature than 70 degree C during a period on 25 to 30 minutes to a soft, tacky gel.
  • the soft nature and cushioning effect of this product provides excellent protection of electronic assemblies from external humidity, mechanical shock and vibration.
  • Such optical clear resin is for example the commercial Lumisil 202 UV® supplied by Wacker® company.
  • optical clear resin covers all the surface of both sides of the functional film (13) to insure a good adhesion and sealing between the outer and the inner sheets of glass (11, 12).
  • the optical coupling material (14) may be provided on one side of the functional film (13) in the form of a layer of polymer that is polymerized from a liquid resin as an adhesive film and on the opposite side in the form a polymer cured from a liquid resin.
  • the optical coupling material (14) provided between the functional film (13) and the first and second glass sheets (11, 12) is an optical clear liquid resin.
  • the optical clear resin is then applied in a viscous state (liquid resin) over the surface of the both sides of the functional film (13) in contact with the first and second glass sheets (11, 12).
  • the optical coupling material (14) provided between the functional film (13) and the first and/or second glass sheets (11,12) is an optical clear liquid resin.
  • the optical clear resin is then applied in a viscous state over the surface on one side of the functional film (13) in contact with the first or the second glass sheets (11, 12) and on the other side (opposite side) of the functional film (13) an optical coupling material (14) made of a polymerized liquid resin in the form of a film.
  • the layer is an optical coupling adhesive.
  • the optical clear resin and more generally the optical coupling material (14) according to the present invention extends over the functional film
  • the optical coupling material (14) and more particularly the optical clear resin is a thermal cure type , high elongation silicone gel. It can also be two-component type.
  • the functional film (13), when it is incorporated into a laminated glazing (1) and positioned on a vehicle, in particular as glazed roof or side window, advantageously has to have a good aesthetic and a quick switch in mode ON/OFF in case of switchable film and clear image/information/video in case of integrated display such as OLED display.
  • thermochromic means in which the variation is obtained by modifying the state of colored ions in compositions included in these glazing (1) and which are sensitive to application of high pressure and temperature.
  • glazing comprising, in suspension, layers of particles that, depending on the application of an electric voltage, are or are not ordered, such as the systems referred to as suspended particles devices (SPDs), or even a polymer-dispersed liquid-crystal (PDLC) film consisting of a polymer containing liquid crystals sensitive to the application of the electric voltage or even a guest-host liquid crystal film which include polymers, inorganic particles, or dichroic dye within the liquid crystal matrix.
  • SPDs suspended particles devices
  • PDLC polymer-dispersed liquid-crystal
  • the "electrically powered film” is a liquid crystals (LC) film providing controllable visual isolation.
  • the main function is the transformation of an essentially transparent glazing (1) into a glazing that is simply translucent.
  • the electrically powered functional film (13) may be a display film which is electrically operated to illustrate pictures and/or videos to be seen from the outer and/or inner of the vehicle wherein the glazing (1) is placed.
  • the "electrically powered functional film” may be made of OLED and more particularly well known AMOLED.
  • the glazing (1) according to the present invention may comprise a combination of one switchable film and OLED film.
  • the functional film (13) has a size smaller than the first (11) and the second sheet of glass (12).
  • the functional film (13) is electrically powered through a flexible connector.
  • the way to connect the functional film (13) to a power is well-known.
  • the functional film (13) is not limited to examples given above and it should be understood broadly that any functional film (13) to be used in glazing (1) which is suitable or not for interlayer lamination, like PVB lamination.
  • the electrically powered film (13) is a film sensitive to pressure such as pressure applied during a classical lamination process including autoclave bend a glazing (1).
  • This kind of pressure is a pressure comprised 0.04MPa and 1.4MPa.
  • the functional film (13) is for example a LC film which is known to be sensitive to pressure. It is understood the functional film (13) may be a LC film, a GHLC film, an OLED film, PDLC film, SPD film or other functional film (13) sensitive to pressure as described previously.
  • the invention relates to any laminated glazing (1), whether tempered or not, that comprises a functional film (13) that is preferably sensitive to pressure, and the glazing (1) has optionally a complex curvature to fit with the design of the automotive, and the glazing (1) comprises a bonding layer for lamination as described above, but not limited to.
  • the spacer means (15) of the present invention is suitable for a laminated glazing (1) comprising a functional film (13) according to the definitions above, more specifically the spacer means (15) of the present invention is configured to protect the functional film (13) laminated inside the glazing (1) from the external pressure applied on the glazing (1).
  • the spacer means (15) is provided at least partially around the periphery of the glazing edge. [0065]The spacer means (15) is applied on the edge of the glazing (1), so that it prevents the external pressure applied on the glazing to be transmitted to the functional film (13).
  • the spacer means (15) needs to be applied on the edge of the glazing where the external pressure is applied, for instance, for an openable side windows of a vehicle, common practice is to fix a mounting apparatus (also called “bracket") to the bottom edge of the side windows and in this case, the spacer means (15) is needed to be applied on the bottom edge of the glazing, especially where the mounting apparatus contacts the glazing to prevent the pressure applied by the mounting apparatus not to be transmitted to the functional film (13).
  • the spacer means (15) provided at least partially around the periphery of the glazing edge should also be understood as the spacer means is substantially parallel to the glazing border (B) by being in an elongated shape, i.e., the spacer means (15) preferably follows the contour of the glazing border.
  • the spacer means (15) is provided all around the periphery of the glazing edge. Similar to above embodiment, the spacer means (15) may also be applied all overthe glazing edges covering whole periphery of the glazing (1). Here “all around” should be understood as more than 90% of the periphery, since in the case of liquid adhesives used as optical coupling material (14), injection and evacuation holes needed on the spacer means (15). Such embodiment is useful when external pressure is surrounding the glazing like in the example of encapsulation frame for the rear-fixes used in the vehicles. With the spacer means (15) provided all around the glazing edges, almost any external pressure applied to any point on the glazing edges is prevented to be transmitted to the functional film (13).
  • the glazing edge should be understood as the area from where the functional film (13) ends to the border of the glass sheets (11, 12) and the border of the glazing should be understood as the physical border of the glass as shown in Figure 5, in practice the glazing edge may have a width of 5 cm or less or even more in some cases depending on the intended application.
  • the spacer means (15) provided all around the periphery of the glazing edge, it should be understood that the spacer means (15) surrounding the glazing and covering at least partially the glazing edge area as described above, i.e., the spacer means (15) all around the periphery of the glazing not necessarily means the sealing means (15) covers the whole edge of the glazing, i.e., whole width of the glazing edge, in other words the width of the spacer means (15) is less than equal to width of the edge of the glazing.
  • the spacer means (15) is provided at least partially around the periphery of the glazing edge, it should be understood as the spacer means (15) is provided on at least one part of the glazing edge as described, not necessarily surrounding the glazing.
  • the glazing (1) comprises at least two spacer means (15) provided consecutively on the glazing edge, the spacer means (15) are positioned next to each other in the perpendicular direction to the glazing edge, in other words, the plurality of spacer means (15) run along or extend almost parallel to each other and also almost parallel to the glazing border (B), so one can be called on the outer and the other as inner as shown in Figure 4.
  • the distance between the two spacer means (15) is preferably more than 5 mm.
  • the spacer means (15) in this embodiment may be combined with the embodiments above, for instance the spacer means (15) provided close to the glazing border (B), i.e., the outer spacer means (15) may be provided all around the glazing edge and the inner spacer means (15) may only be provided partially around the glazing edge or any combinations of the above. Depending on the application, there may be more than two spacer means installed into the glazing.
  • the spacer means (15) prevents external pressure applied to the glazing edge to be transmitted to the functional film (13) by absorbing the pressure on itself and/or eliminating the torque resulted by the external pressure by minimizing the distance between the point where external pressure applied and the spacer means (15).
  • the likelihood of the torque creation is minimized since the path creating the torque is minimized.
  • the distance (dl) between the spacer means (15) and the glazing border (B) is less than 5 mm, preferably less than 3 mm. Since the external pressure is commonly applied on where it is close the border of the glazing during the manufacturing step or during the use of the glazing, the spacer means (15) is provided close to the border of the glazing in order to minimize the path generating the torque on the functional film (13). By providing the spacer means (15) very close to the border of the glazing, it is provided that the generated torque on the functional film (13) is minimized or diminished completely.
  • the width (wl) of the spacer means (15) is at least 3 mm.
  • the spacer means (15) is provided to be wide enough to absorb the pressure or shorten the distance creating the torque.
  • the spacer means (15) by being wide enough, reduces the said path to prevent the torque, i.e., preventing the externally applied pressure on the glazing edge to be transmitted to the functional film (13).
  • the width (wl) of the spacer means (15) has variations along the periphery of the glazing edge. Depending on the intended application and the method of preventing the external pressure applied on the glazing edge to be transmitted to the functional film, the width of the spacer means (15) can be adjusted.
  • the hardness of the spacer means (15) is lower than a predefined maximum limit, as described above, the spacer means is soft enough to absorb/damp the force/pressure applied on the glazing and in the meantime it is hard enough to maintain two glass sheets (11, 12) in position.
  • the hardness of the spacer means (15) is higher or equal to than the hardness of the optical coupling material (14). As described above, the spacer means (15) prevents external pressure applied on the glazing edge to be transmitted to the functional film by absorbing the external pressure applied on the glazing edge.
  • the spacer means (15) is provided as a harder material than the optical coupling material (14) that the spacer means (15) is the first encountering the pressure when an external pressure is applied on the glazing edge, thus absorbing the energy in itself and not allowing to be transmitted to the functional film.
  • the optical coupling material (14) is keeping the functional film rigid inside the lamination and the spacer means (15) absorbing the incoming pressure energy.
  • the hardness of the spacer means (15) may be lower than the hardness of the optical coupling material (14) and yet the spacer means (15) continues to absorb/damp the force/pressure applied on the glazing to protect the pressure-sensitive functional film (13). It is found out that with this arrangement, the spacer means (15) still continues to prevent the externally applied pressure not to be transmitted to the functional film (13) to cause a defect and yet, it is less effective than the embodiment above. It is more important that the hardness of the spacer means (15) is lower than the predefined maximum limit.
  • the spacer means (15) prevents the external pressure applied on the glazing edge to be transmitted to the functional film (13) by reducing the distance creating the torque. In such cases, the spacer means (15) better to be harder than the optical coupling material (14) that the spacer means (15) does not create itself a pressure for the functional film (13).
  • the hardness of the spacer means (15) is more than 20 in shore hardness scale A, more preferably more than 40 in shore scale A, even more preferably more than 100 in shore scale A.
  • the spacer means (15) is made of polyurethane (PU) material.
  • PU is a material that is flexible enough to be able to absorb the pressure energy for the embodiments described above.
  • PU material may be a rigid material so that it can also be used as spacer means (15) when the spacer means (15) prevents the external pressure applied to the glazing edge to be transmitted to the functional film by reducing the path creating the torque. Due to its open structure, the PU material allows ventilation for the glazing, therefore eliminating the potential condensation problem. By its adaptable properties, PU is a good candidate for the spacer means (15).
  • the spacer means (15) may made of PBT, PE, POM, PA, polyamide, aluminum, ABS or any suitable material depending on the intended application, therefore the material list is not limited to the mentioned materials.
  • the spacer means (15) comprises an adhesive on its sides.
  • the spacer means (15) also functions as the separator for the glass sheets (11, 12) and it is the last element inside the glazing after the functional film or the optical coupling material.
  • the spacer means (15) comprising the adhesive on its double side can be mounted/installed to the glazing in a convenient way.
  • the adhesive may be a conventional glue or may also be an adhesive tape such as double sided adhesive tape.
  • the spacer means (15) is installed on the glass sheets (11, 12) before the lamination step and then two glass sheets (11, 12) laminated afterwards.
  • a black enamel (BB) is printed on the glazing edge (E) and the spacer means (15) is hidden behind the black enamel (BB). It is common practice to have black enamel on the glazing edges in automotive industry for several purposes.
  • the spacer means (15) is aligned with the black enamel (BB) to sustain the aesthetics of the glazing (1).
  • the distance (d2) between the spacer means (15) and the black enamel (BB) is at least 1 mm.
  • the width of the spacer means (15) is not necessarily same with the width of the black enamel. In fact, the spacer means (15) is narrower than the black enamel to avoid aesthetics issues.
  • the distance (d2) between the spacer means (15) and the black enamel (BB) is at least 1 mm from at least one side, preferably from both sides.
  • the spacer means (15) is aligned with an external pressure applying means (P) as shown in figure 8.
  • the spacer means (15) prevents the external pressure applied on the glazing edge to be transmitted to the functional film by reducing the path creating the torque force.
  • the spacer means (15) is aligned with the external pressure applying means (P).
  • the external pressure applying means (P) for automotive glazings are already known as discussed above like the guide rails or the mounting apparatus or the encapsulation frame, the guide rails where the glazing slides when the windows are opening and closing. Therefore, the location where the external pressure applied on the glazing edge is predefined and yet, the spacer means (15) can be aligned with external pressure applying means to reduce the path, i.e., no or less torque is applied to the functional film.
  • the pressure applying means (P) is an external element (X) attached/fixed to glazing (1).
  • a mounting apparatus is fixed to bottom edge of the glazing to be able to slide the glazing up and down and for not openable side windows for the vehicles, a frame is fixed to all around the edges of the glazing, which is also called encapsulation frame. Those are applying pressure on the glazing edges. Therefore, the mounting apparatus or the encapsulation frame is an external element (X) attached to the glazing (1). Since the guide rails are not fixed to the glazing, the guide rails are not an external element (X) attached/fixed to the glazing but an external element applying pressure to the glazing edge.
  • the spacer means (15) is part of the external element (X) as shown in figures 7 and 8.
  • the said external elements are usually provided with a U shape cross section that the glazing fits onto, and the external element (X) is fixed/attached to the glazing after the lamination step, i.e., the external element (X) contacts the glazing on Pl and P4 surfaces.
  • the external element (X) has the spacer means (15) integrated in itself by having a W-like shape that the spacer means (15) constitutes the middle part and the external element (X) is partially fixed/attached to the glazing before the lamination to be able to provide the spacer means (15) inside the lamination in a convenient way.
  • the external element (X) is composed of two parts, one part from hard material and the other is from a softer material.
  • the softer part of the external element (X) is overmoulded over the glazing after lamination (Fig.8).
  • the spacer means (15) may be included into the hard (or first installed) part of the external element (X) and it may be installed before the lamination and afterwards the lamination the said overmoulding process may be realized.
  • the spacer means (15) is part of the holder/mounting apparatus.
  • the glazings (1) used in automotive field, especially the side windows (sidelite) of a vehicle (V) requires a holder, i.e., a mounting apparatus for the window sliding/opening mechanisms, also called as brackets. Such parts are usually fixed permanently to the glazing (1) with adhesives.
  • the spacer means (15) is used as part of the mount/holder for the glazing (1).
  • the spacer means (15) is part of the encapsulation frame.
  • the spacer means (15) may be provided just along the external element (X), i.e., just to cover the length of the external element or provided partially on the glazing edge or provided all around the periphery of the glazing edge.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

La présente invention se rapporte à un vitrage feuilleté (1) comprenant au moins une première feuille de verre (11) présentant une face externe (P1) et une face interne (P2), un film fonctionnel alimenté électriquement (13), une seconde feuille de verre (12) présentant une face interne (P3) et une face externe (P4), au moins un matériau de couplage optique (14) disposé entre ledit film fonctionnel (13) et lesdites première (11) et/ou seconde (12) feuilles de verre, ledit film fonctionnel (13) étant stratifié entre les faces internes (P2, P3) des feuilles de verre (11, 12).
PCT/EP2024/061322 2023-06-09 2024-04-24 Vitrage feuilleté dynamique Pending WO2024251428A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23178322 2023-06-09
EP23178322.6 2023-06-09

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Publication Number Publication Date
WO2024251428A1 true WO2024251428A1 (fr) 2024-12-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026017330A1 (fr) * 2024-07-16 2026-01-22 Agc Glass Europe Vitrage feuilleté dynamique

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051279A2 (fr) 2000-01-13 2001-07-19 Societa' Italiana Vetro-Siv-S.P.A. Vitrages
WO2010032068A1 (fr) 2008-09-22 2010-03-25 Pilkington Group Limited Vitrage commutable
EP2927033A1 (fr) 2012-11-29 2015-10-07 Asahi Glass Company, Limited Corps similaire à une plaque de vitre de véhicule équipé d'un corps de cadre, et procédé d'assemblage d'un corps similaire à une plaque de vitre de véhicule équipé d'un corps de cadre
US20160243773A1 (en) 2015-02-19 2016-08-25 Jiansheng Wang Laminated Switchable Panel and Methods for Making and Using
WO2019198748A1 (fr) 2018-04-11 2019-10-17 大日本印刷株式会社 Verre feuilleté, procédé de production de verre feuilleté, dispositif de réglage de lumière, cellule de réglage de lumière et stratifié pour dispositif de réglage de lumière
WO2020003252A1 (fr) 2018-06-29 2020-01-02 Agp America S.A. Vitrage feuilleté à couche de cristaux liquides commutable
US20200201113A1 (en) * 2017-06-23 2020-06-25 Webasto SE Vehicle Window Pane Having a Liquid Crystal Arrangement
EP3691892A1 (fr) 2017-10-04 2020-08-12 Webasto SE Procédé pour fabriquer une vitre de véhicule
US20210293068A1 (en) 2020-03-23 2021-09-23 AGC Inc. Holder-equipped window glass
CN115182669A (zh) 2022-07-22 2022-10-14 福耀玻璃工业集团股份有限公司 调光玻璃、车门总成及车辆
WO2022218953A1 (fr) 2021-04-15 2022-10-20 Agc Glass Europe Vitrage feuilleté dynamique

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051279A2 (fr) 2000-01-13 2001-07-19 Societa' Italiana Vetro-Siv-S.P.A. Vitrages
WO2010032068A1 (fr) 2008-09-22 2010-03-25 Pilkington Group Limited Vitrage commutable
EP2927033A1 (fr) 2012-11-29 2015-10-07 Asahi Glass Company, Limited Corps similaire à une plaque de vitre de véhicule équipé d'un corps de cadre, et procédé d'assemblage d'un corps similaire à une plaque de vitre de véhicule équipé d'un corps de cadre
US20160243773A1 (en) 2015-02-19 2016-08-25 Jiansheng Wang Laminated Switchable Panel and Methods for Making and Using
US20200201113A1 (en) * 2017-06-23 2020-06-25 Webasto SE Vehicle Window Pane Having a Liquid Crystal Arrangement
EP3691892A1 (fr) 2017-10-04 2020-08-12 Webasto SE Procédé pour fabriquer une vitre de véhicule
WO2019198748A1 (fr) 2018-04-11 2019-10-17 大日本印刷株式会社 Verre feuilleté, procédé de production de verre feuilleté, dispositif de réglage de lumière, cellule de réglage de lumière et stratifié pour dispositif de réglage de lumière
WO2020003252A1 (fr) 2018-06-29 2020-01-02 Agp America S.A. Vitrage feuilleté à couche de cristaux liquides commutable
US20210293068A1 (en) 2020-03-23 2021-09-23 AGC Inc. Holder-equipped window glass
WO2022218953A1 (fr) 2021-04-15 2022-10-20 Agc Glass Europe Vitrage feuilleté dynamique
CN115182669A (zh) 2022-07-22 2022-10-14 福耀玻璃工业集团股份有限公司 调光玻璃、车门总成及车辆

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026017330A1 (fr) * 2024-07-16 2026-01-22 Agc Glass Europe Vitrage feuilleté dynamique

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