Classifications

• • 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
  • B32B17/10009—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
  • 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
• • 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
  • B32B17/10009—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
  • B32B17/10018—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 only one glass sheet
  • B32B17/10027—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 only one glass sheet the glass sheet not being an outer layer
• • 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
  • B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
• • 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
  • B32B17/10009—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
  • B32B17/10082—Properties of the bulk of a glass sheet
  • B32B17/10091—Properties of the bulk of a glass sheet thermally hardened
• • 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
  • B32B17/10009—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
  • B32B17/10082—Properties of the bulk of a glass sheet
  • B32B17/10119—Properties of the bulk of a glass sheet having a composition deviating from the basic composition of soda-lime glass, e.g. borosilicate
• • 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
  • B32B17/10009—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
  • B32B17/10128—Treatment of at least one glass sheet
  • B32B17/10137—Chemical strengthening
• • 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
  • B32B17/1055—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
• • 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
  • B32B17/1055—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
  • B32B17/10743—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 acrylate (co)polymers or salts 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
  • 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
  • B32B17/1055—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
  • B32B17/10752—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 polycarbonate
• • 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
  • B32B17/1055—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
  • B32B17/10761—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 vinyl acetal
• • 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
  • B32B17/1055—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
  • B32B17/1077—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 polyurethane
• • 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
  • 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
  • B32B17/1055—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
  • B32B17/10779—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 polyester
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • 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
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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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/02—Physical, chemical or physicochemical properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
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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
  • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
  • C03C27/06—Joining glass to glass by processes other than fusing
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  • 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
  • B32B2605/18—Aircraft

Definitions

• the present invention relates to a glazing for an aerial vehicle, land or water, or for the building, preferably an aeronautical glazing, having an increased performance in several types of impacts including hail and small birds.
• Airplanes with heated glazing are more particularly concerned, such as business jets, regional aircraft of the type marketed by the ATR Company, for example, commercial, medium, long-haul aircraft, etc.
• Aircraft windshields in particular consist of a so-called structural block with a mainly mechanical function (resistance to pressure forces and impact to larger birds) associated such as by lamination to a sheet (or fold) such as than glass providing the interface with the exterior of the aircraft.
• This sheet thanks to a heating function, prevents the appearance of frost in flight; it must also withstand windshield wipers and sandblasting.
• the outer glass is laminated with a relatively thick interlayer adhesive mat.
• An intermediate adhesive here denotes a polymer material bonding two sheets of mineral and / or organic glass together.
• organic glass are poly (methyl methacrylate) (PMMA), polycarbonate (PC), polyurethane (PU) and, as an interlayer adhesive, polyvinyl butyral (PVB), thermoplastic polyurethane (TPU), ethylene vinyl acetate (EVA) copolymer.
• the outer glass Due to the relatively large thickness of the interlayer adhesive mat, the outer glass, under the impact of hail (up to 50 mm in diameter) or small birds, is flexed up to when it breaks. This stress prevents reducing the thickness of this outer glass which is typically 3 mm. However, reducing this thickness can make it possible to reduce the mass of the glazing.
• the invention relates to a laminated glazing comprising a transparent structural substrate bonded to a glass sheet of thickness between 0.5 and 4 mm, intended to constitute an outer surface of the laminated glazing , by means of an intermediate adhesive layer with a thickness of between 4 and 10 mm, characterized in that the intermediate adhesive layer successively comprises a thickness of between 0.25 and 2.5 mm of a first flexible polymer material having a relaxation modulus at most equal to 2 GPa for relaxation times at least equal to 10 min, at temperatures at least equal to -40 ° C, in contact with the glass sheet, then a thickness of a second stiff polymer material having a relaxation modulus of at least 4 GPa, for time constants at most equal to 0.1 milliseconds and temperatures at most equal to 40 ° C (conditions representative of a hail-type impact on an airplane ).
• the structural transparent substrate consists of a sheet of glass or more frequently of several laminates, the cumulative thickness of which is relatively large to perform the mechanical function mentioned above. It can be mineral glass, but also organic such as poly (methyl methacrylate) (PMMA), polycarbonate (PC) or polyurethane (PU).
• PMMA poly (methyl methacrylate)
• PC polycarbonate
• PU polyurethane
• the increased stiffness of the interlayer adhesive layer limits the deformations of the glass sheet and therefore repels the speed of impact of hail or small birds causing breakage. It is therefore possible to use a thinner glass sheet reducing the mass of the laminated glazing.
• the thickness of the interlayer adhesive layer is made of said stiff second polymeric material, and 10 to 60% of that thickness is made of said first flexible polymer material.
• a thickness of said first flexible polymeric material is interposed between and in contact with the thickness of said second stiff polymeric material and the transparent structural substrate.
• the relaxation modulus of said first polymer material is at most equal to 2, preferably 0.5 GPa for relaxation times at least equal to 10 min, at temperatures at least equal to -40 ° vs.
• the elastic modulus of said second polymer material is at least equal to 5 GPa, for time constants at most equal to 0.1 milliseconds and temperatures at most equal to 40 ° C.
• the thickness of the glass sheet is between 1.5 and 3 mm.
• said sheet of glass consists of chemically reinforced glass, in particular soda-lime or aluminosilicate, or is thermally toughened.
• the structural transparent substrate comprises at least one sheet of glass or several laminates, in particular aluminosilicate or soda-lime, at least one of which can be chemically reinforced;
• Glass here also denotes a structural transparent organic polymer material such as. poly (methyl methacrylate) (PMMA), polycarbonate (PC), polyurethane (PU), polyester such as poly (ethylene terephthalate) (PET) or equivalent.
• said first polymer material is chosen from a thermoplastic polyurethane (TP U), polyvinyl butyral (PVB), ethylene - vinyl acetate (EVA) alone or as a mixture or copolymer of several of them.
• TP U thermoplastic polyurethane
• PVB polyvinyl butyral
• EVA ethylene - vinyl acetate
• said second polymer material is chosen from a poly (methyl methacrylate) (PMMA), polycarbonate (PC), polyurethane (PU), polyester such as poly (ethylene terephthalate) (PET) alone or in mixture or copolymer of several of them.
• PMMA poly (methyl methacrylate)
• PC polycarbonate
• PU polyurethane
• PET polyester
• PET poly (ethylene terephthalate)
• said second stiff polymeric material extends to the edges of said sheet of glass.
• said second stiff polymeric material is recessed from the edges of said sheet of glass. This arrangement softens the periphery of the glazing (area most subject to cold temperatures), so as to improve reliability. Such encapsulation of the interfaces between stiff and flexible polymer materials limits the risks of delamination. In addition, space is thus freed up to allow connection elements to walk.
• the glass sheet intended to constitute an outer surface of the laminated glazing and the stiff polymeric material are set back relative to the transparent structural substrate, so as not to form part of the attachment of the laminated glazing.
• Another object of the invention consists of the application of a laminated glazing as described above as glazing for an air, land or water vehicle, or for the building, in particular as an aircraft glazing.
• FIG. 1 shows schematically in section, a laminated glazing according to the invention.
• FIG. 2 is a graph representing the results of a second series of hail impact tests.
• FIG. 3 is a schematic sectional representation of a laminated glazing according to the invention, the outer glass sheet and the stiff polymeric material of which are set back relative to the structural transparent substrate, so as not to form part of the attachment of the laminated glazing.
• FIG. 4 shows schematically the attachment of the glazing of Figure 3 to the cabin of an aircraft.
• FIG. 5 shows schematically in section a laminated glazing according to the invention which differs from that of Figure 3 only by a stiff polymer material set back relative to the outer sheet of glass.
• This laminated glazing comprises two main glass elements: a substrate or transparent structural block 1 and a glass sheet 2 intended to be in contact with an external atmosphere from which a relatively punctual / light impact such as hail is likely to originate. or little bird.
• the transparent structural block 1 is formed so as to guarantee the laminated glazing all the required mechanical resistance, vis-à-vis the pressure variations to which an aircraft may be subjected, for example, and the most significant shocks, such as that big birds. It consists of two sheets of chemically reinforced aluminosilicate glass 8 mm thick 1 a and 1 b glued to each other by a layer 6 of PVB 2.28 mm thick, this thickness possibly being in generally between 1, 5 and 3 mm.
• the glass sheet 2 is made of chemically reinforced soda-lime glass and of a thickness of between 1.5 and 3 mm. It is bonded to the transparent structural block 1 by a relatively thick intermediate adhesive layer 3. In the event of an almost punctual impact of the hail type, the mattress formed by this intermediate adhesive layer 3 deforms under the glass sheet 2, thus allowing it to flex under the effect of the impact.
• the intermediate adhesive layer 3 consists of a layer of polymethyl methacrylate (PMMA) 5 from 1 to 9 mm thick, between two layers of thermoplastic polyurethane (TPU) 4a, respectively 4b from 0.25 to 2, 5, respectively 0.25 to 5 mm thick.
• PMMA polymethyl methacrylate
• TPU thermoplastic polyurethane
• the relaxation modulus of PMMA 5 for time constants at most equal to 0.1 milliseconds and temperatures at most equal to 40 ° C, is between 6 and 7 GPa
• the modulus of relaxation of the TPU for relaxation times at least equal to 10 min, at temperatures at least equal to -40 ° C. is 1 GPa.
• test specimens of 500 mm X 500 mm were used consisting of a monolithic structural fold and a glass exposed to hail, glued one to the other. 'the other by an interlayer mattress (TPU) possibly reinforced by a PMMA.
• TPU interlayer mattress
• Figure 3 shows a glass sheet 2 intended to be in contact with the external atmosphere and a complex interlayer adhesive layer 4a, 5, 4b according to the invention, which are set back relative to the transparent structural substrate 1a, 6, 1b.
• the interlayer 4a, 5, 4b of Figure 3 is shown diagrammatically in a single block of reference number 3.
• the parts of the glazing allowing the mechanical connection (attachment) to the cabin of the plane, either pinched or bolted, are represented by two dotted areas.
• Glass sheet 2 and interlayer 3 (including stiff polymeric material 5) are not part of the laminated glazing attachment.
• the total thickness of the glass sheet 2 and of the interlayer 3 is adjusted to achieve aerodynamic continuity with the ice press 7, the thickness of which is itself conditioned by the need to withstand pressurization forces.
• the material of the glass sheet 2 ensures resistance to abrasion, and the possibility of supporting heating layers with an anti-icing function based on ITO (indium tin-doped oxide).
• the intermediate layer 3 therefore consists of three layers of polymer material, with a density 2.5 times lower than that of glass 2.
• the invention uses a complex intermediate layer as described above, in which it is in particular important that the layer of flexible polymer material 4a does not is not too thick.
• the stiff polymer material 5 is set back relative to the outer glass sheet 2.
• the peripheral part of the polymer material 5 is extended by filling or plugging with the flexible polymer material 4c of the same characteristics than flexible polymer materials 4a, 4b.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• Ceramic Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Joining Of Glass To Other Materials (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (9)

Family Cites Families (7)

• 2019
  • 2019-11-20 FR FR1912943A patent/FR3103137B1/fr active Active
• 2020
  • 2020-11-18 CN CN202080080442.5A patent/CN114650909A/zh active Pending
  • 2020-11-18 KR KR1020227019136A patent/KR20220102627A/ko not_active Ceased
  • 2020-11-18 EP EP20821342.1A patent/EP4061628A1/de active Pending
  • 2020-11-18 BR BR112022009677A patent/BR112022009677A2/pt unknown
  • 2020-11-18 CA CA3158334A patent/CA3158334A1/fr active Pending
  • 2020-11-18 IL IL293147A patent/IL293147A/en unknown
  • 2020-11-18 WO PCT/FR2020/052122 patent/WO2021099740A1/fr not_active Ceased
  • 2020-11-18 US US17/778,279 patent/US12059869B2/en active Active

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