EP3890965A1 - Laminated glazing comprising a peripheral stepped element made of polymer material having a required maximum permeability to water vapor - Google Patents

Laminated glazing comprising a peripheral stepped element made of polymer material having a required maximum permeability to water vapor

Info

Publication number
EP3890965A1
EP3890965A1 EP19839353.0A EP19839353A EP3890965A1 EP 3890965 A1 EP3890965 A1 EP 3890965A1 EP 19839353 A EP19839353 A EP 19839353A EP 3890965 A1 EP3890965 A1 EP 3890965A1
Authority
EP
European Patent Office
Prior art keywords
laminated glazing
glass sheet
glazing according
thickness
glass
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
EP19839353.0A
Other languages
German (de)
French (fr)
Inventor
Thomas TONDU
Didier TELLIER
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.)
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain 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 Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of EP3890965A1 publication Critical patent/EP3890965A1/en
Pending legal-status Critical Current

Links

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
    • 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
    • B32B17/10045—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 with at least one intermediate layer consisting of a glass sheet
    • 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
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10293—Edge features, e.g. inserts or holes
    • B32B17/10302—Edge sealing
    • 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
    • B32B17/10614—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 comprising particles for purposes other than dyeing
    • 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
    • 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
    • B32B17/10788—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
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • B32B3/08—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 characterised by added members at particular parts
    • 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
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
    • 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
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • 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
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
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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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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    • 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
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    • B32B2605/18—Aircraft

Definitions

  • Aeronautical heated windshields are laminated sheets of at least three sheets (or folds) of mineral and / or organic glass, the outermost of which can support the heating function (defrosting). These sheets are bonded two by two via intermediate adhesive layers such as polyvinyl butyral (PVB), thermoplastic polyurethane (TPU), ethylene-vinyl acetate (EVA), ionomer ... Moisture can penetrate the intermediate adhesive layers , in particular that between the heating external fold and its neighboring fold and causing failures by different mechanisms:
  • PVB polyvinyl butyral
  • TPU thermoplastic polyurethane
  • EVA ethylene-vinyl acetate
  • Moisture can penetrate the intermediate adhesive layers , in particular that between the heating external fold and its neighboring fold and causing failures by different mechanisms:
  • heating layers such as indium oxide doped with tin (Indium Tin Oxide - ITO -) (inducing a cracking of the layers which can be the cause of an electric arc near the layers);
  • the external fold not being naturally held by the connection system to the airplane (which maintains the two structural folds), due to the deformations of the glazing subjected to the pressure of the airplane, of the tear-off mechanisms. and / or peripheral shearing of the external fold can take place, which promotes delamination phenomena.
  • Moisture penetration can be managed by different strategies:
  • a sealing element typically of the two-component polysulphide or polyurethane (PU) type;
  • peripheral step element or Z - "zed" - metallic (stainless steel, aluminum) glued, conforming to a peripheral zone of the laminated glazing, as will be seen later; this zed is glued to the glass sheets of the laminated glazing and can be covered by an air and water seal, such as silicone or equivalent, as well as by a "drop" (external seal in polysulfide or equivalent) providing aerodynamic continuity between glazing and aircraft structure and good inertia to aeronautical fluids (cleaning products, glycol (defrosting ground)...) ; moreover the drop also makes it possible to significantly limit the problems linked to arcs and sparks, in particular the collection of electric arcs and surface discharges.
  • peripheral barrier elements in tiers called “zed” in stainless steel (or sometimes aluminum) has greatly reduced the penetration of humidity and has thus been able to largely eliminate the failure modes mentioned above. .
  • cables run at the level of the zed between the outer fold and the inner face of the glazing;
  • the inventors therefore sought to replace the metallic zed with a zed made of polymer material which can be shaped, for example, by a thermoforming process.
  • the polymer material was chosen to have sufficient water vapor permeability properties to prevent degradation of the glazing.
  • specific permeability P is understood to mean the permeation rate of 1 mm of material.
  • the fluxes are then expressed in g / m 2 / day.mm and express the barrier performance against the intrinsic water vapor of a material.
  • the water vapor barrier performance of a given material or combination of materials (of given thickness) is its permeability p expressed in g / m 2 / day.
  • the invention relates to a laminated glazing comprising at least a first sheet of glass constituting an outer face of the glazing, connected to a second sheet of glass by a first intermediate adhesive layer, in which the edge of the first sheet of glass is set back from that of the second, a peripheral part of the free surface of the first sheet of glass, the edge of the latter, the edge of the first interlayer adhesive layer and part of the surface of the second sheet of glass projecting from the first sheet of glass describing a continuous stepped outline which is covered by a stepped element with interposition of glue, characterized in that the stepped element is made of polymer material which may contain reinforcing fillers, and has a permeability to water vapor at most equal to 5, and preferably 1 g / m 2 / day.
  • glass is meant here both a mineral glass such as soda-lime, aluminosilicate, etc., as well as an organic glass made up of a transparent structural polymer material, including poly (methyl methacrylate) (PMMA) and polycarbonate (PC). are common examples.
  • PMMA poly (methyl methacrylate)
  • PC polycarbonate
  • the metallic step elements do not cause any water vapor permeation through their thickness, but a bypass path via glue (polysulfide) exists. Due to the greater flexibility of the step elements made of polymer material, it is possible to reduce the thickness of glue and to make these step elements equivalent in terms of permeability to water vapor to the bonded metallic step elements.
  • thermoforming are substantially less expensive than stamping metals
  • the polymeric materials have a flexibility making the sensitivity of the relative shapes of the step element and the laminated glazing more easily manageable in production and limit the bonding stresses which can cause detachment of the step element in service.
  • Said adhesive comprises, for example, a polysulphide and / or a polyurethane.
  • the tiered element is integral, in one part, or possibly in several parts.
  • the step element has an elastic modulus at most equal to 5GPa; it should be emphasized that this excludes polymers (such as thermosetting resins of the epoxy type, unsaturated polyester) reinforced with reinforcing fibers (FRP of English “fiber reinforced polymer”), which designates a reinforcement by fibers (such as glass or carbon) relatively long, possibly woven;
  • polymers such as thermosetting resins of the epoxy type, unsaturated polyester
  • FRP of English “fiber reinforced polymer” which designates a reinforcement by fibers (such as glass or carbon) relatively long, possibly woven
  • polymer material is chosen from polyolefins (including polyethylene (PE), polypropylene (PP) or polyisobutylene (P-IB)), polyvinyl chloride and its derivatives (for example poly (vinyl dichloride) (PVDC)), styrenic polymer (e.g.
  • polystyrene PS
  • ABS acrylostyrene butadiene
  • SAN styrene acrylonitrile
  • PAN polyacrylonitrile
  • PMMA poly (methyl methacrylate)
  • PET poly (ethylene terephthalate)
  • PBT poly (butylene terephthalate)
  • POM polyoxymethylene
  • PA fluoropolymer
  • PCTFE polychlorotrifluoroethylene
  • PCTFE polycarbonate
  • PC aromatic polysulfone including polysulfone (PSU), polyphenylene ether ( PPE), polyurethane and polyurea (PU), epoxy (EP) alone or as a mixture and / or copolymer of several of them;
  • the step element is composed of several layers of identical or different polymeric materials, which can be obtained by coextrusion for example;
  • Said polymer material contains oriented lamellar reinforcing fillers and / or short fibers; these charges are such as to promote a sufficiently low permeability to water vapor; mention may be made of short glass or carbon fibers;
  • the step element has a thickness at most equal to 800, preferably 300 ⁇ m;
  • said polymeric material has at least one surface treatment providing ⁇ better barrier performance against water vapor: dense oxide (s) deposited by chemical vapor deposition CVD such as S1O2, AI2O3;
  • - Said adhesive has a thickness at most equal to 350, preferably 200 ⁇ m;
  • the tiered element is covered by an air and water seal, and protection against solar radiation and fluids; this seal is advantageously made of silicone or equivalent;
  • the tiered element is covered by a drop which provides the laminated glazing with aerodynamic continuity between glazing and mounting structure such as aircraft structure and good inertia to processing fluids such as aeronautical fluids, cleaning products, degreaser, glycol for ground defrosting and the like; this drop may be made of polysulfide or equivalent;
  • the laminated glazing comprises at least a third glass sheet connected to the second glass sheet by a second intermediate adhesive layer; in this configuration in particular, the step element can extend beyond said continuous step contour defined above, so as to cover the entire thickness of the laminated glazing, including the edges of the second sheet of glass, the second intermediate adhesive layer and the third glass sheet;
  • the first glass sheet is made of mineral glass with a thickness of between 0.5 and 5, preferably between 2 and 4 mm, or of a polymer material such as poly (methyl methacrylate) (PMMA) with a thickness of between 0 , 5 and 5 mm;
  • PMMA poly (methyl methacrylate)
  • the second glass sheet, and where appropriate the third glass sheet, or even the following sheets, are made of mineral glass with a thickness of between 4 and 10 mm, or of a polymer material such as poly (methyl methacrylate) (PMMA) d 'thickness between 5 and 30, preferably at most 20 mm;
  • PMMA poly (methyl methacrylate)
  • said intermediate adhesive layers are made of polyurethane (PU),
  • the thickness of the first intermediate adhesive layer is between 3 and 10, preferably 4 and 8 mm, and the thickness of the second intermediate adhesive layer and where appropriate, the following is between 0.5 and 4, preferably at most equal to 2 mm.
  • Another object of the invention consists in a method of manufacturing the laminated glazing described above, characterized in that the step element is produced separately from its mounting structure by thermoforming, injection, injection molding and RIM reaction ( reaction injection molding), extrusion or coextrusion, blowing, compression-transfer.
  • the composite tiered elements (resin reinforced with fiberglass) formed directly on the laminated glazing are designed for good evacuation of gases during the curing stage of the resins (reticulation in an autoclave or vacuum bag). This good ability to drain gases is antagonistic with good moisture barrier performance (porosity effect).
  • the step element is made in one or in several parts.
  • Another object of the invention consists in the application of the laminated glazing described above as glazing for buildings, land, air or water vehicles, or for street furniture, in particular as cockpit glazing for air vehicles.
  • FIG.1 shows schematically in section a first embodiment of the laminated glazing of the invention
  • FIG.2 schematically shows in section a second embodiment of the laminated glazing of the invention
  • FIG. 3 is a partial schematic view of a laminated glazing according to the invention in support of specific explanations relating to the water vapor permeability of the step element ("zed") made of polymer material.
  • a glass sheet designates a chemical toughened aluminosilicate glass sheet, sold by the Saint-Gobain Sully Company under the registered trademark Solidion®.
  • a laminated glazing comprises a first sheet of glass 1 constituting an outer face of the glazing, 3 mm thick, bonded to a second glass sheet 3 of 8 mm thick by a first layer Polyvinyl butyral (PVB) interlayer 2 adhesive 5.3 mm thick.
  • PVB Polyvinyl butyral
  • a third sheet of glass 5 8 mm thick is bonded to the second 3 by a second intermediate adhesive layer 4 of polyvinyl butyral (PVB) 2 mm thick.
  • PVB polyvinyl butyral
  • the edge of the first sheet of glass 1 is set back relative to that of the second 3, a peripheral part of the free surface of the first sheet of glass 1, the edge of the latter 1, the edge of the first adhesive layer interlayer 2 and part of the surface of the second glass sheet 3 projecting from the first glass sheet 1 describing a continuous step contour which is covered by a step element 7 of polyethylene terephthalate (PET) of 355 pm d 'thickness.
  • PET polyethylene terephthalate
  • step element 7 Said continuous step contour is covered by the step element 7 with the interposition of a thickness of 100 ⁇ m of glue 6 made of polysulphide.
  • step element 7 is covered by a seal 8 for air and water sealing, in silicone, and by a drop 9 in polysulphide which provides the laminated glazing with aerodynamic continuity between glazing. and mounting structure such as aircraft structure and good inertia to the processing fluids as already explained.
  • the step element 7 may be more extended than shown, so as to cover for example the entire peripheral edge of the laminated glazing, in particular also the edges of the second sheet of glass 3, of the second interlayer adhesive layer 4, and the third glass sheet 5.
  • equivalent barrier corresponding to a fictitious material covering exactly the thickness of interlayer on the periphery of the glazing.
  • the water vapor permeation properties of the equivalent barrier are then defined by
  • the replacement of a step element 7 made of metal by a step element 7 made of PET is capable of giving a permeability p lowered by 0.87 to 0.67 g / m 2 / day on the one hand, from 0.91 to 0.68 g / m 2 / day on the other hand.
  • the deformable polymer material more easily follows the shape of the glazing without mounting constraints. Its use makes it possible to reduce the thicknesses of glue from 500 ⁇ m or 1 mm to 100 ⁇ m, hence the possibility of reducing the value of the permeability p relative to the metallic zed (step element) 7.
  • the non-metallic zed eliminates all the drawbacks linked to the electroconductivity of metals, as expected.
  • the manufacturing costs are lower for the polymer material, in particular by thermoforming, than for metals, especially with regard to tooling.

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  • Laminated Bodies (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The invention relates to - a laminated glazing comprising a first glass sheet (1) constituting an external face of the glazing, connected to a second glass sheet (3) by a first interlayer adhesive layer (2), the edge of the first glass sheet (1) being set back with respect to that of the second (3), a peripheral part of the free surface of the first glass sheet (1), its edge face, that of the first interlayer adhesive layer (2) and a part of the surface of the second glass sheet (3) extending beyond the first (1) describing a continuous stepped contour which is covered, with interposition of adhesive (6), with a stepped element (7) made of polymer material which can contain reinforcing fillers, which exhibits a permeability to water vapor at most equal to 5 g/m2/day; - its process of manufacture; - its application (aeronautics, and the like).

Description

Description Description
Titre : VITRAGE FEUILLETE A ELEMENT EN GRADIN PERIPHERIQUE EN MATERIAU POLYMERE AYANT UNE PERMEABILITE A LA VAPEUR Title: SHEET GLAZING WITH PERIPHERAL GRADINE ELEMENT IN POLYMERIC MATERIAL HAVING STEAM PERMEABILITY
D’EAU MAXIMALE REQUISE MAXIMUM WATER REQUIRED
Les pare-brise aéronautiques chauffants sont des feuilletés d’au moins trois feuilles (ou plis) de verres minéraux et/ou organiques dont la plus externe peut être support de la fonction de chauffage (dégivrage). Ces feuilles sont collées deux à deux par l’intermédiaire de couches adhésives intercalaires telles que polyvinylbutyral (PVB), polyuréthane thermoplastique (TPU), éthylène - acétate de vinyle (EVA), ionomère... L’humidité peut pénétrer les couches adhésives intercalaires, notamment celle entre le pli externe chauffant et son pli voisin et engendrer des défaillances par différents mécanismes : Aeronautical heated windshields are laminated sheets of at least three sheets (or folds) of mineral and / or organic glass, the outermost of which can support the heating function (defrosting). These sheets are bonded two by two via intermediate adhesive layers such as polyvinyl butyral (PVB), thermoplastic polyurethane (TPU), ethylene-vinyl acetate (EVA), ionomer ... Moisture can penetrate the intermediate adhesive layers , in particular that between the heating external fold and its neighboring fold and causing failures by different mechanisms:
- délaminages ; - delamination;
- corrosion, oxydation des éléments de connectique électrique ; - corrosion, oxidation of the electrical connection elements;
- électrolyse des couches chauffantes telles qu’oxyde d’indium dopé à l’étain (Indium Tin Oxide - ITO -) (induisant un craquement des couches pouvant être la cause d’un arc électrique au ras des couches) ; - electrolysis of the heating layers such as indium oxide doped with tin (Indium Tin Oxide - ITO -) (inducing a cracking of the layers which can be the cause of an electric arc near the layers);
- opacification, blanchiment d’intercalaire ; - clouding, interlayer bleaching;
- coloration périphérique par migration d’élément teintant de colle / joint (par exemple en polysulfure) dans l’intercalaire. - peripheral coloring by migration of tinting element of glue / seal (for example in polysulphide) in the interlayer.
Par ailleurs, le pli externe n’étant pas naturellement tenu par le système de liaison à l’avion (qui maintient les deux plis structuraux), du fait des déformations du vitrage soumis à la pression de l’avion, des mécanismes d’arrachement et/ou cisaillement périphérique du pli externe peuvent avoir lieu, ce qui favorise des phénomènes de délaminage. In addition, the external fold not being naturally held by the connection system to the airplane (which maintains the two structural folds), due to the deformations of the glazing subjected to the pressure of the airplane, of the tear-off mechanisms. and / or peripheral shearing of the external fold can take place, which promotes delamination phenomena.
La pénétration d’humidité peut être gérée par différentes stratégies : Moisture penetration can be managed by different strategies:
- application périphérique de quelques mm d’un élément d’étanchéification : typiquement de type polysulfure ou polyuréthane (PU) bicomposant ; - peripheral application of a few mm of a sealing element: typically of the two-component polysulphide or polyurethane (PU) type;
- application d’un élément périphérique en gradin (ou en Z - « zed » -) métallique (acier inoxydable, aluminium) collé, conforme à une zone périphérique du vitrage feuilleté, comme il sera vu par la suite ; ce zed est collé aux feuilles de verre du vitrage feuilleté et peut être couvert par un joint d’étanchéité à l’air et à l’eau, tel qu’en silicone ou équivalent, ainsi que par une « goutte » (joint externe en polysulfure ou équivalent) procurant une continuité aérodynamique entre vitrage et structure avion et une bonne inertie aux fluides aéronautiques (produits de nettoyage, glycol (dégivrage au sol)...) ; de plus la goutte permet également de limiter sensiblement les problématiques liées aux arcs et étincelles, notamment la captation arc électrique et les décharges de surface. - application of a peripheral step element (or Z - "zed" -) metallic (stainless steel, aluminum) glued, conforming to a peripheral zone of the laminated glazing, as will be seen later; this zed is glued to the glass sheets of the laminated glazing and can be covered by an air and water seal, such as silicone or equivalent, as well as by a "drop" (external seal in polysulfide or equivalent) providing aerodynamic continuity between glazing and aircraft structure and good inertia to aeronautical fluids (cleaning products, glycol (defrosting ground)...) ; moreover the drop also makes it possible to significantly limit the problems linked to arcs and sparks, in particular the collection of electric arcs and surface discharges.
L’application d’un élément d’étanchéification présente de nombreuses difficultés. En effet la mise en œuvre est extrêmement délicate car il faut ménager lors du feuilletage une zone sans intercalaire, ce qui induit de grands risques de défaut optique (maintien du parallélisme de faces du feuilleté). Par ailleurs, les produits utilisés pour l’étanchéification sont de piètres barrières à l’humidité ce qui rend cette solution peu efficace (contraintes liées au procédé d’application par injection, notamment). The application of a sealing element presents many difficulties. In fact, the implementation is extremely delicate because it is necessary to provide an area without interlayer during the laminating, which induces great risks of optical defect (maintaining the parallelism of the laminated faces). In addition, the products used for sealing are poor moisture barriers which makes this solution ineffective (constraints related to the application process by injection, in particular).
Au contraire, l’application d’éléments barrière périphériques en gradin, dits « zed » en inox (ou parfois aluminium) a fortement réduit les pénétrations d’humidité et a ainsi pu éliminer en très grande partie les modes de défaillance cités ci-dessus. On the contrary, the application of peripheral barrier elements in tiers, called “zed” in stainless steel (or sometimes aluminum) has greatly reduced the penetration of humidity and has thus been able to largely eliminate the failure modes mentioned above. .
En revanche l’application du zed métallique a induit de nouveaux problèmes : On the other hand, the application of metallic zed induced new problems:
- risque accru de défaut d’isolement électrique vis-à-vis d’éléments des systèmes chauffants ; on précise que pour alimenter les couches chauffantes, des câbles cheminent au niveau du zed entre le pli externe et la face intérieure du vitrage; - increased risk of electrical insulation fault vis-à-vis elements of heating systems; it is specified that to supply the heating layers, cables run at the level of the zed between the outer fold and the inner face of the glazing;
- décharges électriques entre zed et structure avion à l’origine d’une gêne sonore, lumineuse et/ou électromagnétique, ou élément de la connectique du vitrage (défaillance); - electrical discharges between zed and aircraft structure causing noise, light and / or electromagnetic interference, or element of the glazing connection (failure);
- facilitation des amorces de décharges de surface éblouissantes pour les pilotes ; - facilitating the start of dazzling surface discharges for pilots;
- point d’accroche de la foudre (caractère métallique électroconducteur et saillant des zed) ; - point of attachment of lightning (metallic character electroconductive and projecting from zed);
- fragilisation du joint silicone en son extrémité ; - embrittlement of the silicone seal at its end;
- coûts d’outillages de formage tel que par emboutissage prohibitifs pour les petites séries ; - costs of forming tools such as by prohibitive stamping for small series;
- gestion complexe des tolérances de forme zed-vitrage ; - complex management of zed-glazing form tolerances;
- géométrie des zed qui leur confère une bonne raideur et rend le procédé de fabrication complexe ; - zed geometry which gives them good stiffness and makes the manufacturing process complex;
- caractère métallique du zed qui incite sinon oblige à le recouvrir d’une « goutte » typiquement en polysulfure qui induit un besoin de maintenance car cette goutte tend à s’éroder. - metallic character of the zed which incites if not obliges to cover it with a "drop" typically made of polysulfide which induces a need for maintenance because this drop tends to erode.
Les inventeurs ont donc cherché à substituer le zed métallique par un zed en matériau polymère pouvant être mis en forme par exemple par un procédé de thermoformage. Le matériau polymère a été choisi pour présenter des propriétés de perméabilité à la vapeur d’eau suffisantes pour prévenir la dégradation des vitrages. On entend par perméabilité spécifique P la vitesse de perméation de 1 mm de matériau. Les flux sont alors exprimés en g/m2/jour.mm et expriment la performance barrière à la vapeur d’eau intrinsèque d’un matériau. The inventors therefore sought to replace the metallic zed with a zed made of polymer material which can be shaped, for example, by a thermoforming process. The polymer material was chosen to have sufficient water vapor permeability properties to prevent degradation of the glazing. The term specific permeability P is understood to mean the permeation rate of 1 mm of material. The fluxes are then expressed in g / m 2 / day.mm and express the barrier performance against the intrinsic water vapor of a material.
La performance barrière à la vapeur d’eau d’un matériau ou d’une combinaison de matériaux donnée (d’épaisseur donnée) est sa perméabilité p exprimée en g/m2/jour. The water vapor barrier performance of a given material or combination of materials (of given thickness) is its permeability p expressed in g / m 2 / day.
Pour un matériau homogène d’épaisseur e, on a la relation p = P/e. For a homogeneous material of thickness e, we have the relation p = P / e.
Les inventeurs ont pu garantir l’étanchéité à la vapeur d’eau procurée par les éléments périphériques en gradin (« zed ») métalliques tout en surmontant les problèmes liés à leur caractère électroconducteur et à leurs procédés de fabrication. A cette fin, l’invention a pour objet un vitrage feuilleté comprenant au moins une première feuille de verre constituant une face extérieure du vitrage, reliée à une seconde feuille de verre par une première couche adhésive intercalaire, dans lequel le bord de la première feuille de verre est en retrait par rapport à celui de la seconde, une partie périphérique de la surface libre de la première feuille de verre, le chant de cette dernière, le chant de la première couche adhésive intercalaire et une partie de la surface de la seconde feuille de verre débordant de la première feuille de verre décrivant un contour continu en gradin qui est recouvert par un élément en gradin avec interposition de colle, caractérisé en ce que l’élément en gradin est en matériau polymère pouvant contenir des charges de renforcement, et présente une perméabilité à la vapeur d’eau au plus égale à 5, et de préférence 1 g/m2/jour. The inventors have been able to guarantee the water vapor tightness provided by the metallic stepped peripheral elements (“zed”) while overcoming the problems linked to their electroconductive nature and to their manufacturing processes. To this end, the invention relates to a laminated glazing comprising at least a first sheet of glass constituting an outer face of the glazing, connected to a second sheet of glass by a first intermediate adhesive layer, in which the edge of the first sheet of glass is set back from that of the second, a peripheral part of the free surface of the first sheet of glass, the edge of the latter, the edge of the first interlayer adhesive layer and part of the surface of the second sheet of glass projecting from the first sheet of glass describing a continuous stepped outline which is covered by a stepped element with interposition of glue, characterized in that the stepped element is made of polymer material which may contain reinforcing fillers, and has a permeability to water vapor at most equal to 5, and preferably 1 g / m 2 / day.
Par verre on entend ici aussi bien un verre minéral tel que sodocalcique, aluminosilicate..., qu’un verre organique constitué d’un matériau polymère structural transparent, dont le poly (méthacrylate de méthyle) (PMMA) et le polycarbonate (PC) sont des exemples courants. By glass is meant here both a mineral glass such as soda-lime, aluminosilicate, etc., as well as an organic glass made up of a transparent structural polymer material, including poly (methyl methacrylate) (PMMA) and polycarbonate (PC). are common examples.
En pratique les éléments en gradin métalliques n’engendrent aucune perméation de vapeur d’eau à travers leur épaisseur, mais un chemin de contournement via la colle (polysulfure) existe. Du fait de la plus grande souplesse des éléments en gradin en matériau polymère, il est possible de réduire l’épaisseur de colle et de rendre ces éléments en gradin équivalents en termes de perméabilité à la vapeur d’eau aux éléments en gradin métalliques collés. In practice, the metallic step elements do not cause any water vapor permeation through their thickness, but a bypass path via glue (polysulfide) exists. Due to the greater flexibility of the step elements made of polymer material, it is possible to reduce the thickness of glue and to make these step elements equivalent in terms of permeability to water vapor to the bonded metallic step elements.
Tous les problèmes électriques susmentionnés des éléments en gradin métalliques sont supprimés. Les matériaux polymères sont de bons isolants électriques. All the above-mentioned electrical problems of the metallic step elements are eliminated. Polymeric materials are good electrical insulators.
De plus, - les procédés de mise en œuvre des matériaux polymères tels que le thermoformage sont substantiellement moins onéreux que l’emboutissage des métaux ; Furthermore, - The processes for using polymeric materials such as thermoforming are substantially less expensive than stamping metals;
- les matériaux polymères ne sont pas soumis à la corrosion ; - polymeric materials are not subject to corrosion;
- les matériaux polymères présentent une souplesse rendant la sensibilité des formes relatives de l’élément en gradin et du vitrage feuilleté plus facilement gérables en production et limitent les contraintes de collage qui peuvent engendrer des décollements d’élément en gradin en service. - the polymeric materials have a flexibility making the sensitivity of the relative shapes of the step element and the laminated glazing more easily manageable in production and limit the bonding stresses which can cause detachment of the step element in service.
Ladite colle comprend par exemple un polysulfure et/ou un polyuréthane. Said adhesive comprises, for example, a polysulphide and / or a polyurethane.
L’élément en gradin est intègre, d’une seule partie, ou éventuellement il est en plusieurs parties. The tiered element is integral, in one part, or possibly in several parts.
Selon des caractéristiques préférées du vitrage feuilleté de l’invention : According to preferred characteristics of the laminated glazing of the invention:
- l’élément en gradin présente un module élastique au plus égal à 5GPa ; il doit être souligné que cela exclut les polymères (tels que résines thermodurcissables du type époxy, polyester insaturé) renforcés par des fibres de renforcement (FRP de l’anglais « fiber reinforced polymer »), qui désigne un renforcement par des fibres (telles que de verre ou de carbone) relativement longues, éventuellement tissées ; - the step element has an elastic modulus at most equal to 5GPa; it should be emphasized that this excludes polymers (such as thermosetting resins of the epoxy type, unsaturated polyester) reinforced with reinforcing fibers (FRP of English “fiber reinforced polymer”), which designates a reinforcement by fibers (such as glass or carbon) relatively long, possibly woven;
ledit matériau polymère est choisi parmi les polyoléfine (dont polyéthylène (PE), polypropylène (PP) ou polyisobutylène (P-IB)), polychlorure de vinyle et ses dérivés ( par exemple poly(dichlorure de vinyle) (PVDC)), polymère styrénique (par exemple polystyrène (PS), acrylostyrène butadiène (ABS), styrène acrylonitrile (SAN)), polyacrylique (dont polyacrylonitrile (PAN) et poly(méthacrylate de méthyle) (PMMA) ), polyester (dont poly(téréphtalate d’éthylène) (PET) et poly(téréphtalate de butylène) (PBT)), polyoxyméthylène (POM) , polyamide (PA), polymère fluoré tel que polychlorotrifluoroéthylène (PCTFE), polycarbonate (PC), polysulfone aromatique dont polysulfone (PSU), polyphénylène éther (PPE), polyuréthane et polyUrée (PU), époxy (EP) seuls ou en mélange et/ou copolymère de plusieurs d’entre eux; said polymer material is chosen from polyolefins (including polyethylene (PE), polypropylene (PP) or polyisobutylene (P-IB)), polyvinyl chloride and its derivatives (for example poly (vinyl dichloride) (PVDC)), styrenic polymer (e.g. polystyrene (PS), acrylostyrene butadiene (ABS), styrene acrylonitrile (SAN)), polyacrylic (including polyacrylonitrile (PAN) and poly (methyl methacrylate) (PMMA)), polyester (including poly (ethylene terephthalate) (PET) and poly (butylene terephthalate) (PBT)), polyoxymethylene (POM), polyamide (PA), fluoropolymer such as polychlorotrifluoroethylene (PCTFE), polycarbonate (PC), aromatic polysulfone including polysulfone (PSU), polyphenylene ether ( PPE), polyurethane and polyurea (PU), epoxy (EP) alone or as a mixture and / or copolymer of several of them;
- l’élément en gradin est composé de plusieurs couches de matériaux polymères identiques ou différents, pouvant être obtenues par coextrusion par exemple ; - the step element is composed of several layers of identical or different polymeric materials, which can be obtained by coextrusion for example;
- ledit matériau polymère contient des charges de renforcement lamellaires orientées et/ou en fibres courtes ; ces charges sont de nature à favoriser une perméabilité à la vapeur d’eau suffisamment faible ; on peut citer des fibres courtes de verre ou de carbone ; - Said polymer material contains oriented lamellar reinforcing fillers and / or short fibers; these charges are such as to promote a sufficiently low permeability to water vapor; mention may be made of short glass or carbon fibers;
- l’élément en gradin a une épaisseur au plus égale à 800, de préférence 300 pm ; - The step element has a thickness at most equal to 800, preferably 300 μm;
- ledit matériau polymère présente au moins un traitement de surface procurant ■ une meilleure performance barrière à la vapeur d’eau : oxyde(s) dense(s) déposé(s) par dépôt chimique en phase vapeur CVD tel(s) que S1O2, AI2O3 ;- said polymeric material has at least one surface treatment providing ■ better barrier performance against water vapor: dense oxide (s) deposited by chemical vapor deposition CVD such as S1O2, AI2O3;
■ une propriété d’adhésion. ■ a membership property.
- ladite colle a une épaisseur au plus égale à 350, de préférence 200 pm ; - Said adhesive has a thickness at most equal to 350, preferably 200 μm;
- l’élément en gradin est recouvert par un joint d’étanchéité à l’air et à l’eau, et de protection au rayonnement solaire et aux fluides ; ce joint est avantageusement en silicone ou équivalent ; - the tiered element is covered by an air and water seal, and protection against solar radiation and fluids; this seal is advantageously made of silicone or equivalent;
- l’élément en gradin est recouvert par une goutte qui procure au vitrage feuilleté une continuité aérodynamique entre vitrage et structure de montage telle que structure avion et une bonne inertie aux fluides de traitement tels que fluides aéronautiques, produits de nettoyage, dégraissant, glycol pour le dégivrage au sol et similaires ; cette goutte peut être en polysulfure ou équivalent ; - the tiered element is covered by a drop which provides the laminated glazing with aerodynamic continuity between glazing and mounting structure such as aircraft structure and good inertia to processing fluids such as aeronautical fluids, cleaning products, degreaser, glycol for ground defrosting and the like; this drop may be made of polysulfide or equivalent;
- le vitrage feuilleté comprend au moins une troisième feuille de verre reliée à la seconde feuille de verre par une seconde couche adhésive intercalaire ; dans cette configuration notamment, l’élément en gradin peut s’étendre au-delà dudit contour continu en gradin défini ci-dessus, de manière à couvrir toute l’épaisseur du vitrage feuilleté, y compris les chants de la seconde feuille de verre, de la seconde couche adhésive intercalaire et de la troisième feuille de verre ; the laminated glazing comprises at least a third glass sheet connected to the second glass sheet by a second intermediate adhesive layer; in this configuration in particular, the step element can extend beyond said continuous step contour defined above, so as to cover the entire thickness of the laminated glazing, including the edges of the second sheet of glass, the second intermediate adhesive layer and the third glass sheet;
- la première feuille de verre est en verre minéral d’épaisseur comprise entre 0,5 et 5, de préférence entre 2 et 4 mm, ou en matériau polymère tel que poly(méthacrylate de méthyle) (PMMA) d’épaisseur comprise entre 0,5 et 5 mm ; the first glass sheet is made of mineral glass with a thickness of between 0.5 and 5, preferably between 2 and 4 mm, or of a polymer material such as poly (methyl methacrylate) (PMMA) with a thickness of between 0 , 5 and 5 mm;
- la seconde feuille de verre, et le cas échéant la troisième feuille de verre, voire les suivantes sont en verre minéral d’épaisseur comprise entre 4 et 10 mm, ou en matériau polymère tel que poly(méthacrylate de méthyle) (PMMA) d’épaisseur comprise entre 5 et 30, de préférence au plus 20 mm ; the second glass sheet, and where appropriate the third glass sheet, or even the following sheets, are made of mineral glass with a thickness of between 4 and 10 mm, or of a polymer material such as poly (methyl methacrylate) (PMMA) d 'thickness between 5 and 30, preferably at most 20 mm;
- lesdites couches adhésives intercalaires sont en polyuréthane (PU), - said intermediate adhesive layers are made of polyurethane (PU),
polyvinylbutyral (PVB), éthylène - acétate de vinyle (EVA) ou équivalent, l’épaisseur de la première couche adhésive intercalaire est comprise entre 3 et 10, de préférence 4 et 8 mm, et l’épaisseur de la seconde couche adhésive intercalaire et le cas échéant des suivantes est comprise entre 0,5 et 4, de préférence au plus égale à 2 mm. polyvinyl butyral (PVB), ethylene - vinyl acetate (EVA) or equivalent, the thickness of the first intermediate adhesive layer is between 3 and 10, preferably 4 and 8 mm, and the thickness of the second intermediate adhesive layer and where appropriate, the following is between 0.5 and 4, preferably at most equal to 2 mm.
Un autre objet de l’invention consiste en un procédé de fabrication du vitrage feuilleté décrit ci-dessus, caractérisé en ce que l’élément en gradin est fabriqué séparément de sa structure de montage par thermoformage, injection, moulage par injection et réaction RIM (reaction injection molding), extrusion ou coextrusion, soufflage, compression-transfert. A l’inverse, il doit être précisé que les éléments en gradin composites (résine renforcée par fibre de verre) formés directement sur le vitrage feuilleté sont conçus pour une bonne évacuation des gaz durant l’étape de durcissement des résines (réticulation en autoclave ou poche sous vide). Cette bonne capacité à drainer les gaz est antagoniste avec de bonnes performances de barrière à l’humidité (effet de porosité). Par le procédé de l’invention, l’élément en gradin est fabriqué en une seule ou en plusieurs parties. Another object of the invention consists in a method of manufacturing the laminated glazing described above, characterized in that the step element is produced separately from its mounting structure by thermoforming, injection, injection molding and RIM reaction ( reaction injection molding), extrusion or coextrusion, blowing, compression-transfer. Conversely, it should be noted that the composite tiered elements (resin reinforced with fiberglass) formed directly on the laminated glazing are designed for good evacuation of gases during the curing stage of the resins (reticulation in an autoclave or vacuum bag). This good ability to drain gases is antagonistic with good moisture barrier performance (porosity effect). By the method of the invention, the step element is made in one or in several parts.
Un autre objet de l’invention consiste en l’application du vitrage feuilleté décrit ci- dessus comme vitrage de bâtiment, de véhicule terrestre, aérien ou aquatique, ou pour le mobilier urbain, en particulier comme vitrage de cockpit de véhicule aérien. Another object of the invention consists in the application of the laminated glazing described above as glazing for buildings, land, air or water vehicles, or for street furniture, in particular as cockpit glazing for air vehicles.
L’invention sera mieux comprise à la lumière des exemples suivants, en référence aux dessins annexés dans lesquels The invention will be better understood in the light of the following examples, with reference to the accompanying drawings in which
[Fig .1 ] représente schématiquement en coupe une première réalisation du vitrage feuilleté de l’invention ; [Fig .1] shows schematically in section a first embodiment of the laminated glazing of the invention;
[Fig .2] représente schématiquement en coupe une seconde réalisation du vitrage feuilleté de l’invention ; [Fig .2] schematically shows in section a second embodiment of the laminated glazing of the invention;
[Fig .3] est une vue schématique partielle d’un vitrage feuilleté selon l’invention en appui des explications spécifiques relatives à la perméabilité à la vapeur d’eau de l’élément en gradin (« zed ») en matériau polymère. [Fig. 3] is a partial schematic view of a laminated glazing according to the invention in support of specific explanations relating to the water vapor permeability of the step element ("zed") made of polymer material.
Dans ces exemples, une feuille de verre désigne une feuille de verre aluminosilicate trempée chimique, commercialisée par la Société Saint-Gobain Sully sous la marque enregistrée Solidion®. In these examples, a glass sheet designates a chemical toughened aluminosilicate glass sheet, sold by the Saint-Gobain Sully Company under the registered trademark Solidion®.
En référence aux Figures 1 et 2, un vitrage feuilleté comprend une première feuille de verre 1 constituant une face extérieure du vitrage, de 3 mm d’épaisseur, collée à une seconde feuille de verre 3 de 8 mm d’épaisseur par une première couche adhésive intercalaire 2 de polyvinylbutyral (PVB) de 5,3 mm d’épaisseur. Referring to Figures 1 and 2, a laminated glazing comprises a first sheet of glass 1 constituting an outer face of the glazing, 3 mm thick, bonded to a second glass sheet 3 of 8 mm thick by a first layer Polyvinyl butyral (PVB) interlayer 2 adhesive 5.3 mm thick.
Une troisième feuille de verre 5 de 8 mm d’épaisseur est collée à la seconde 3 par une seconde couche adhésive intercalaire 4 de polyvinylbutyral (PVB) de 2 mm d’épaisseur. A third sheet of glass 5 8 mm thick is bonded to the second 3 by a second intermediate adhesive layer 4 of polyvinyl butyral (PVB) 2 mm thick.
Le bord de la première feuille de verre 1 est en retrait par rapport à celui de la seconde 3, une partie périphérique de la surface libre de la première feuille de verre 1 , le chant de cette dernière 1 , le chant de la première couche adhésive intercalaire 2 et une partie de la surface de la seconde feuille de verre 3 débordant de la première feuille de verre 1 décrivant un contour continu en gradin qui est recouvert par un élément en gradin 7 en polytéréphtalate d’éthylène (PET) de 355 pm d’épaisseur. The edge of the first sheet of glass 1 is set back relative to that of the second 3, a peripheral part of the free surface of the first sheet of glass 1, the edge of the latter 1, the edge of the first adhesive layer interlayer 2 and part of the surface of the second glass sheet 3 projecting from the first glass sheet 1 describing a continuous step contour which is covered by a step element 7 of polyethylene terephthalate (PET) of 355 pm d 'thickness.
Ledit contour continu en gradin est recouvert par l’élément en gradin 7 avec interposition d’une épaisseur de 100 pm de colle 6 en polysulfure. Sur la Figure 2, l’élément en gradin 7 est recouvert par un joint 8 d’étanchéité à l’air et à l’eau, en silicone, et par une goutte 9 en polysulfure qui procure au vitrage feuilleté une continuité aérodynamique entre vitrage et structure de montage telle que structure avion et une bonne inertie aux fluides de traitement comme déjà explicité. Said continuous step contour is covered by the step element 7 with the interposition of a thickness of 100 μm of glue 6 made of polysulphide. In FIG. 2, the step element 7 is covered by a seal 8 for air and water sealing, in silicone, and by a drop 9 in polysulphide which provides the laminated glazing with aerodynamic continuity between glazing. and mounting structure such as aircraft structure and good inertia to the processing fluids as already explained.
En référence aux Figures 1 et 2, l’élément en gradin 7 peut être plus étendu que représenté, de manière à recouvrir par exemple tout le bord périphérique du vitrage feuilleté, notamment aussi les chants de la seconde feuille de verre 3, de la seconde couche adhésive intercalaire 4, et de la troisième feuille de verre 5. With reference to FIGS. 1 and 2, the step element 7 may be more extended than shown, so as to cover for example the entire peripheral edge of the laminated glazing, in particular also the edges of the second sheet of glass 3, of the second interlayer adhesive layer 4, and the third glass sheet 5.
En référence à la Figure 3, relativement à l’élément en gradin 7 en PET collé sur le chant du vitrage feuilleté, trois flux d’humidité (vapeur d’eau) sont à considérer : With reference to Figure 3, in relation to the tiered element 7 made of PET bonded to the edge of the laminated glazing, three moisture flows (water vapor) are to be considered:
- flux cheminant à travers la colle entre l’élément en gradin 7 et la première feuille de verre 1 , d’épaisseur h1 ; - flow passing through the adhesive between the step element 7 and the first glass sheet 1, of thickness h1;
- flux cheminant à travers la colle entre l’élément en gradin 7 et la seconde feuille de verre 3, d’épaisseur h2 ; - flow passing through the adhesive between the step element 7 and the second glass sheet 3, of thickness h2;
- flux cheminant à travers l’élément en gradin 7 d’épaisseur eZed. - flow passing through the step element 7 of thickness e Z ed.
Ces trois flux diffusent dans la première couche adhésive intercalaire d’épaisseur H. These three flows diffuse in the first intermediate adhesive layer of thickness H.
On peut alors introduire la notion de barrière équivalente correspondant à un matériau fictif couvrant exactement l’épaisseur d’intercalaire sur la périphérie du vitrage. Les propriétés de perméation à la vapeur d’eau de la barrière équivalente sont alors définies parWe can then introduce the notion of equivalent barrier corresponding to a fictitious material covering exactly the thickness of interlayer on the periphery of the glazing. The water vapor permeation properties of the equivalent barrier are then defined by
[Math 1 ] [Math 1]
/l /i H / l / i H
Peq ' H = Pi— + P2— + Pzed Peq 'H = Pi— + P 2 - + P ze d
L1 l2 e zed L1 l 2 e zed
Les valeurs nécessaires au calcul de peq, et le résultat sont consignés dans les tableaux suivants, pour quatre structures de vitrage feuilleté précisées sous chacun des tableaux. TABLE 1] The values necessary for the calculation of p eq , and the result are recorded in the following tables, for four laminated glazing structures specified under each of the tables. TABLE 1]
Comme le montre la comparaison des Tableaux 1 et 2 d’une part, 3 et 4 d’autre part, le remplacement d’un élément en gradin 7 métallique par un élément en gradin 7 en PET est apte à donner une perméabilité p abaissée de 0,87 à 0,67 g/m2/jour d’une part, de 0,91 à 0,68 g/m2/jour d’autre part. As shown by the comparison of Tables 1 and 2 on the one hand, and 3 and 4 on the other hand, the replacement of a step element 7 made of metal by a step element 7 made of PET is capable of giving a permeability p lowered by 0.87 to 0.67 g / m 2 / day on the one hand, from 0.91 to 0.68 g / m 2 / day on the other hand.
En effet le matériau polymère, déformable, épouse plus facilement la forme du vitrage sans contraintes de montage. Son emploi permet de réduire les épaisseurs de colle de 500 pm ou 1 mm à 100 miti, d’où la possibilité de diminuer la valeur de la perméabilité p par rapport au zed (élément en gradin) 7 métallique. Indeed, the deformable polymer material more easily follows the shape of the glazing without mounting constraints. Its use makes it possible to reduce the thicknesses of glue from 500 μm or 1 mm to 100 μm, hence the possibility of reducing the value of the permeability p relative to the metallic zed (step element) 7.
Le zed non métallique supprime tous les inconvénients liés à l’électroconductivité des métaux, comme attendu. Les coûts de fabrication sont plus faibles pour le matériau polymère, notamment par thermoformage, que pour les métaux, surtout en ce qui concerne les outillages. The non-metallic zed eliminates all the drawbacks linked to the electroconductivity of metals, as expected. The manufacturing costs are lower for the polymer material, in particular by thermoforming, than for metals, especially with regard to tooling.

Claims

REVENDICATIONS
1. Vitrage feuilleté comprenant au moins une première feuille de verre (1 ) constituant une face extérieure du vitrage, reliée à une seconde feuille de verre (3) par une première couche adhésive intercalaire (2), dans lequel le bord de la première feuille de verre (1 ) est en retrait par rapport à celui de la seconde (3), une partie périphérique de la surface libre de la première feuille de verre (1 ), le chant de cette dernière (1 ), le chant de la première couche adhésive intercalaire (2) et une partie de la surface de la seconde feuille de verre (3) débordant de la première feuille de verre (1 ) décrivant un contour continu en gradin qui est recouvert par un élément en gradin (7) avec interposition de colle (6), caractérisé en ce que l’élément en gradin (7) est en matériau polymère pouvant contenir des charges de renforcement, et présente une perméabilité à la vapeur d’eau au plus égale à 5 g/m2/jour. 1. Laminated glazing comprising at least a first glass sheet (1) constituting an external face of the glazing, connected to a second glass sheet (3) by a first intermediate adhesive layer (2), in which the edge of the first sheet glass (1) is set back from that of the second (3), a peripheral part of the free surface of the first sheet of glass (1), the edge of the latter (1), the edge of the first interlayer adhesive layer (2) and part of the surface of the second glass sheet (3) projecting from the first glass sheet (1) describing a continuous stepped outline which is covered by a stepped element (7) with interposition adhesive (6), characterized in that the stepped element (7) is made of polymer material which may contain reinforcing fillers, and has a permeability to water vapor at most equal to 5 g / m 2 / day .
2. Vitrage feuilleté selon la revendication 1 , caractérisé en ce que l’élément en gradin (7) présente une perméabilité à la vapeur d’eau au plus égale à 1g/m2/jour. 2. Laminated glazing according to claim 1, characterized in that the stepped element (7) has a permeability to water vapor at most equal to 1g / m 2 / day.
3. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que l’élément en gradin (7) présente un module élastique au plus égal à 5GPa (cela exclu les FRP (fiber reinforced polymer)). 3. Laminated glazing according to one of the preceding claims, characterized in that the step element (7) has an elastic modulus at most equal to 5GPa (this excludes FRP (fiber reinforced polymer)).
4. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que ledit matériau polymère est choisi parmi les polyoléfine (dont polyéthylène (PE), polypropylène (PP) ou polyisobutylène (P-IB)), polychlorure de vinyle et ses dérivés ( par exemple poly(dichlorure de vinyle) (PVDC)), polymère styrénique (par exemple polystyrène (PS), acrylostyrène butadiène (ABS), styrène acrylonitrile (SAN)), polyacrylique (dont polyacrylonitrile (PAN) et poly(méthacrylate de méthyle) (PMMA) ), polyester (dont poly(téréphtalate d’éthylène) (PET) et poly(téréphtalate de butylène) (PBT)), polyoxyméthylène (POM) , polyamide (PA), polymère fluoré tel que polychlorotrifluoroéthylène (PCTFE), polycarbonate (PC), polysulfone aromatique dont polysulfone (PSU), polyphénylène éther (PPE), polyuréthane et polyUrée (PU), époxy (EP) seuls ou en mélange et/ou copolymère de plusieurs d’entre eux. 4. Laminated glazing according to one of the preceding claims, characterized in that said polymer material is chosen from polyolefins (including polyethylene (PE), polypropylene (PP) or polyisobutylene (P-IB)), polyvinyl chloride and its derivatives (e.g. poly (vinyl dichloride) (PVDC)), styrenic polymer (e.g. polystyrene (PS), acrylostyrene butadiene (ABS), styrene acrylonitrile (SAN)), polyacrylic (including polyacrylonitrile (PAN) and poly (methyl methacrylate) ) (PMMA)), polyester (including poly (ethylene terephthalate) (PET) and poly (butylene terephthalate) (PBT)), polyoxymethylene (POM), polyamide (PA), fluorinated polymer such as polychlorotrifluoroethylene (PCTFE), polycarbonate (PC), aromatic polysulfone including polysulfone (PSU), polyphenylene ether (PPE), polyurethane and polyurea (PU), epoxy (EP) alone or as a mixture and / or copolymer of several of them.
5. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que l’élément en gradin (7) est composé de plusieurs couches de matériaux polymères identiques ou différents. 5. Laminated glazing according to one of the preceding claims, characterized in that the step element (7) is composed of several layers of identical or different polymer materials.
6. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que ledit matériau polymère contient des charges de renforcement lamellaires orientées et/ou en fibres courtes. 6. Laminated glazing according to one of the preceding claims, characterized in that said polymer material contains oriented lamellar reinforcing fillers and / or short fibers.
7. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que l’élément en gradin (7) a une épaisseur au plus égale à 800, de préférence 300 pm. 7. Laminated glazing according to one of the preceding claims, characterized in that the step element (7) has a thickness at most equal to 800, preferably 300 μm.
8. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que ledit matériau polymère présente au moins un traitement de surface procurant 8. Laminated glazing according to one of the preceding claims, characterized in that said polymeric material has at least one surface treatment providing
■ une meilleure performance barrière à la vapeur d’eau : oxyde(s) dense(s) déposé(s) par dépôt chimique en phase vapeur CVD tel(s) que Si02, AI203 ; et/ou ■ better barrier performance against water vapor: dense oxide (s) deposited by chemical vapor deposition CVD such as Si02, AI203; and or
■ une propriété d’adhésion. ■ a membership property.
9. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que la colle (6) a une épaisseur au plus égale à 350, de préférence 200 pm. 9. Laminated glazing according to one of the preceding claims, characterized in that the adhesive (6) has a thickness at most equal to 350, preferably 200 μm.
10. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que l’élément en gradin (7) est recouvert par un joint (8) d’étanchéité à l’air et à l’eau, et de protection au rayonnement solaire et aux fluides. 10. Laminated glazing according to one of the preceding claims, characterized in that the step element (7) is covered by a seal (8) for air and water tightness, and radiation protection solar and fluids.
1 1 . Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que l’élément en gradin (7) est recouvert par une goutte (9) qui procure au vitrage feuilleté une continuité aérodynamique entre vitrage et structure de montage telle que structure avion et une bonne inertie aux fluides de traitement tels que fluides aéronautiques, produits de nettoyage, dégraissant, glycol pour le dégivrage au sol et similaires. 1 1. Laminated glazing according to one of the preceding claims, characterized in that the stepped element (7) is covered by a drop (9) which provides the laminated glazing with aerodynamic continuity between glazing and mounting structure such as aircraft structure and a good inertia to processing fluids such as aeronautical fluids, cleaning products, degreaser, glycol for ground deicing and the like.
12. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce qu’il comprend au moins une troisième feuille de verre (5) reliée à la seconde feuille de verre (3) par une seconde couche adhésive intercalaire (4). 12. Laminated glazing according to one of the preceding claims, characterized in that it comprises at least a third glass sheet (5) connected to the second glass sheet (3) by a second intermediate adhesive layer (4).
13. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que la première feuille de verre (1 ) est en verre minéral d’épaisseur comprise entre 0,5 et 5, de préférence entre 2 et 4 mm, ou en matériau polymère tel que poly(méthacrylate de méthyle) (PMMA) d’épaisseur comprise entre 0,5 et 5 mm. 13. Laminated glazing according to one of the preceding claims, characterized in that the first glass sheet (1) is in mineral glass with a thickness between 0.5 and 5, preferably between 2 and 4 mm, or in material polymer such as poly (methyl methacrylate) (PMMA) with a thickness between 0.5 and 5 mm.
14. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que la seconde feuille de verre (3), et le cas échéant la troisième feuille de verre (5), voire les suivantes sont en verre minéral d’épaisseur comprise entre 4 et 10 mm, ou en matériau polymère tel que poly(méthacrylate de méthyle) (PMMA) d’épaisseur comprise entre 5 et 30, de préférence au plus 20 mm. 14. Laminated glazing according to one of the preceding claims, characterized in that the second glass sheet (3), and if necessary the third glass sheet (5), or even the following ones are made of mineral glass with a thickness between 4 and 10 mm, or in polymer material such as poly (methyl methacrylate) (PMMA) of thickness between 5 and 30, preferably at most 20 mm.
15. Vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que les couches adhésives intercalaires (2 ; 4) sont en polyuréthane (PU), polyvinylbutyral (PVB), éthylène - acétate de vinyle (EVA) ou équivalent, en ce que l’épaisseur de la première couche adhésive intercalaire (2) est comprise entre 3 et 10, de préférence 4 et 8 mm, et en ce que l’épaisseur de la seconde couche adhésive intercalaire (4) et le cas échéant des suivantes est comprise entre 0,5 et 4, de préférence au plus égale à 2 mm. 15. Laminated glazing according to one of the preceding claims, characterized in that the intermediate adhesive layers (2; 4) are made of polyurethane (PU), polyvinyl butyral (PVB), ethylene - vinyl acetate (EVA) or equivalent, in that that the thickness of the first intermediate adhesive layer (2) is between 3 and 10, preferably 4 and 8 mm, and in that the thickness of the second intermediate adhesive layer (4) and where appropriate of the following is between 0.5 and 4, preferably at most equal to 2 mm.
16. Procédé de fabrication d’un vitrage feuilleté selon l’une des revendications précédentes, caractérisé en ce que l’élément en gradin (7) est fabriqué séparément de sa structure de montage par thermoformage, injection, moulage par injection et réaction RIM (reaction injection molding), extrusion ou coextrusion, soufflage, compression-transfert. 16. Method for manufacturing a laminated glazing according to one of the preceding claims, characterized in that the stepped element (7) is produced separately from its assembly structure by thermoforming, injection, injection molding and RIM reaction (reaction injection molding), extrusion or coextrusion, blowing, compression-transfer.
17. Application d’un vitrage feuilleté selon l’une des revendications 1 à 15 comme vitrage de bâtiment, de véhicule terrestre, aérien ou aquatique, ou pour le mobilier urbain. 17. Application of laminated glazing according to one of claims 1 to 15 as building glazing, land vehicle, aerial or aquatic, or for street furniture.
18. Application selon la revendication 17 comme vitrage de cockpit de véhicule aérien. 18. Application according to claim 17 as glazing for the cockpit of an aerial vehicle.
EP19839353.0A 2018-12-04 2019-12-03 Laminated glazing comprising a peripheral stepped element made of polymer material having a required maximum permeability to water vapor Pending EP3890965A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1872291A FR3089148B1 (en) 2018-12-04 2018-12-04 LAMINATED GLAZING WITH PERIPHERAL GRADINAL ELEMENT IN POLYMERIC MATERIAL HAVING MAXIMUM REQUIRED WATER VAPOR PERMEABILITY
PCT/FR2019/052906 WO2020115425A1 (en) 2018-12-04 2019-12-03 Laminated glazing comprising a peripheral stepped element made of polymer material having a required maximum permeability to water vapor

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EP3890965A1 true EP3890965A1 (en) 2021-10-13

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KR (1) KR20210099026A (en)
CN (1) CN111526983A (en)
BR (1) BR112021009532A2 (en)
CA (1) CA3120332A1 (en)
FR (1) FR3089148B1 (en)
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US4046951A (en) * 1976-11-01 1977-09-06 Ppg Industries, Inc. Laminated transparent assembly with edge sealing means
FR2721253B1 (en) * 1994-06-16 1996-10-11 Saint Gobain Vitrage Laminated glazing fitted with a peripheral strip and method of manufacturing this glazing.
RU5167U1 (en) * 1995-08-08 1997-10-16 Научно-производственное предприятие "Легкая авиация Таганрога" Aircraft Glazing
DE19529449A1 (en) * 1995-08-10 1997-02-20 Flachglas Automotive Gmbh Laminated glass pane
US6818281B2 (en) * 2002-07-30 2004-11-16 Ppg Industries Ohio, Inc. Insert for windshield assembly
FR2909921B1 (en) * 2006-12-15 2012-05-25 Saint Gobain FUNCTIONALIZED GLAZING
FR2955539B1 (en) * 2010-01-26 2016-03-25 Saint Gobain LUMINOUS VEHICLE GLAZING, MANUFACTURING
JP5492647B2 (en) * 2010-04-19 2014-05-14 三菱航空機株式会社 Aircraft cockpit window with electromagnetic shield, aircraft
FR2996803B1 (en) * 2012-10-12 2014-11-21 Saint Gobain MANUFACTURING LAMINATED GLAZING WITH ELECTRICAL CONDUCTOR
FR2996802B1 (en) * 2012-10-12 2014-11-21 Saint Gobain GLAZING SHEET

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FR3089148B1 (en) 2020-12-11
RU2765781C1 (en) 2022-02-02
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CA3120332A1 (en) 2020-06-11
CN111526983A (en) 2020-08-11
KR20210099026A (en) 2021-08-11
WO2020115425A1 (en) 2020-06-11
BR112021009532A2 (en) 2021-08-17
IL283382A (en) 2021-07-29

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