EP3728777B1 - Spacer with moisture-absorbing structure, and corresponding manufacturing method - Google Patents

Spacer with moisture-absorbing structure, and corresponding manufacturing method Download PDF

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Publication number
EP3728777B1
EP3728777B1 EP18822385.3A EP18822385A EP3728777B1 EP 3728777 B1 EP3728777 B1 EP 3728777B1 EP 18822385 A EP18822385 A EP 18822385A EP 3728777 B1 EP3728777 B1 EP 3728777B1
Authority
EP
European Patent Office
Prior art keywords
spacer
absorbent unit
absorbent
unit
fixing
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.)
Active
Application number
EP18822385.3A
Other languages
German (de)
French (fr)
Other versions
EP3728777A1 (en
Inventor
Walter Schreiber
Hans-Werner Kuster
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
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Filing date
Publication date
Priority claimed from FR1762910A external-priority patent/FR3075853B1/en
Application filed by Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of EP3728777A1 publication Critical patent/EP3728777A1/en
Application granted granted Critical
Publication of EP3728777B1 publication Critical patent/EP3728777B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E06B3/66309—Section members positioned at the edges of the glazing unit
    • E06B3/66361—Section members positioned at the edges of the glazing unit with special structural provisions for holding drying agents, e.g. packed in special containers
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E06B3/66309—Section members positioned at the edges of the glazing unit
    • E06B3/66323—Section members positioned at the edges of the glazing unit comprising an interruption of the heat flow in a direction perpendicular to the unit
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E06B3/667—Connectors therefor

Definitions

  • This presentation relates to a spacer for insulating glazing and a method of manufacturing a spacer for insulating glazing.
  • insulating glazing can be obtained by joining a rigid spacer frame to the periphery of two sheets of glass.
  • the spacer frame is conventionally manufactured either by successive folding of a straight spacer, or by angular assembly at their ends of straight spacers, so as to obtain, for example, a rectangular frame.
  • the spacer frame delimits an internal cavity between the glass sheets, said cavity forming an insulating layer of air or of a gas that is less conductive of heat than air, for example argon, which makes it possible to limit losses. due to conduction or convection.
  • the spacer frame contains a moisture-absorbing product, also called a desiccant, intended to absorb the moisture present inside the glazing, in particular just after the glazing has been fitted.
  • a moisture-absorbing product also called a desiccant
  • this moisture-absorbing product is typically in the form of a powder, filling the interior space of the spacer.
  • the pulverulent product is introduced into the spacer through orifices drilled for this purpose in the framework and then filled, generally using butyl.
  • the disadvantage of such spacers is that they have a high thermal conductivity linked to the thermal conductivity of the moisture-absorbing product which fills the interior space. The thermal performance of insulating glazing incorporating these spacers is therefore limited.
  • Requirement EP 1 860 270 describes a different type of spacer obtained by extrusion.
  • the spacer here forms a bead intended to be fixed by gluing to the glass sheets of the glazing and comprising a moisture-absorbing core, coextruded with an at least partially moisture-permeable silicone shell.
  • this type of spacer also does not make it possible to obtain insulating glazing units having good thermal performance.
  • Requirement EP 3 184 725 A1 describes an insulating glass spacer.
  • the present presentation aims to provide an insulating glazing and a method of manufacturing such a spacer, making it possible to remedy the aforementioned problems.
  • the subject of the present presentation is thus an insulating glazing spacer extending in a longitudinal direction and comprising a first and a second fixing parts spaced from each other in a lateral direction and intended to be secured each to a sheet of glass of the insulating glazing unit by adhesive fixing means, and at least one transverse part connecting said first and second fixing parts and delimiting with them an interior space, the spacer comprising, in the interior space, a structure absorbing heat wetness formed of at least one absorbent unit attached to one of the first and the second attachment part, the other of the first and the second attachment part not being in contact with the absorbent unit.
  • Structure is understood to mean a “self-supporting” element or set of elements, that is to say that it exists as such, independently of any support or substrate, unlike a coating or a layer. deposited on a substrate.
  • the moisture-absorbing structure of the spacer according to the invention forms a compact element or set of elements, of finite dimensions.
  • each absorbent unit of the moisture-absorbing structure remaining at a distance from at least one of the fastening parts the structure does not influence the thermal conductivity of the spacer.
  • the thermal performance of the spacer is thus improved compared to that of prior art spacers.
  • the absorbent unit is fixed by adhesive means, for example a hot-melt adhesive.
  • the absorbent structure is arranged so that it is not in contact with the transverse part either.
  • the moisture absorbent structure may include a plurality of absorbent units which are preferably spaced apart in the longitudinal direction by gap areas. These interruption zones are preferably at least 2 mm in order to guarantee effective thermal separation.
  • the moisture absorbent structure may comprise an absorbent unit extending continuously in the longitudinal direction.
  • the absorbent unit forms a profile extending in the longitudinal direction.
  • profile is meant an elongated element, typically of constant or substantially constant section, for example rectangular.
  • the absorbent structure extends over at least 50%, preferably at least 80%, of the total length of the spacer, measured in its longitudinal direction.
  • the section of the absorbent unit measured in a plane orthogonal to the longitudinal direction, is between 30 and 300 mm 2
  • the width of the absorbent unit measured in the lateral direction, is between 0.6 and 0.99 times the total width of the spacer.
  • the absorbent unit can also comprise a combination of several absorbent materials chosen from one or both of the aforementioned categories.
  • the absorbent unit comprises a cohesive core formed of particles of at least one moisture-absorbing material, bound by a binder.
  • the binder can be any plastic material permeable to water vapour.
  • the binder preferably does not contain any volatile material.
  • the binder can thus comprise polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polymethylacrylate (PMMA), polycarbonate (PC), polyamide (PA), polyvinylchloride (PVC), polystyrene ( PS) and/or other styrenic polymers, copolymers (for example ABS, SAN, ASA, etc.) or any suitable combination of the aforementioned elements.
  • PP polypropylene
  • PE polyethylene
  • PET polyethylene terephthalate
  • PMMA polymethylacrylate
  • PC polycarbonate
  • PA polyamide
  • PVC polyvinylchloride
  • PS polystyrene
  • other styrenic polymers copolymers (for example ABS, SAN, ASA, etc.) or any suitable combination of the aforementioned elements.
  • the cohesive core of the absorbent unit is surrounded by a closed envelope permeable to water vapour.
  • the envelope prevents particles from becoming detached and polluting the internal cavity of the glazing. It is usually plastic.
  • the absorbent unit comprises a powdery, friable, liquid, or pasty, for example a powder or a silica gel, surrounded by a closed envelope permeable to water vapour.
  • the envelope is generally made of plastic.
  • This presentation also relates to a method of manufacturing a spacer for insulating glazing extending in a longitudinal direction and comprising a first and a second fixing parts spaced from each other in a lateral direction and intended to be secured each to a sheet of glass of the insulating glazing by means of fixing by bonding, and at least one transverse part connecting said first and second fixing parts and delimiting with them an interior space, the method comprising the fixing of at least one unit absorbent forming a moisture absorbing structure, to one of the first and the second fastening part, the other of the first and the second fastening part not being in contact with the absorbent unit.
  • Said absorbent structure is a self-supporting element or set of elements.
  • the absorbent unit is preextruded, then attached to the first or the second attachment part.
  • the preextruded absorbent unit is surrounded by a closed envelope permeable to water vapor before being attached to the first or second attachment part.
  • the absorbent unit can for example be fixed by gluing, for example by means of a hot-melt adhesive.
  • the absorbent unit is extruded directly on the first or the second fastening part.
  • the absorbent unit is fixed to the first or the second fixing part after securing together the first and second fixing parts.
  • the first and the second fixing parts are connected to the transverse part, so as to form the interior space, and then the absorbent unit is fixed to one of the fixing parts of the spacer.
  • the absorbent unit is fixed to the first or the second fixing part before joining together the first and second fixing parts.
  • the absorbent unit is fixed to the first fixing part, then this part is connected to the second fixing part via the transverse part.
  • This presentation finally relates to a method of manufacturing a spacer frame for insulating glazing comprising at least one spacer as defined above or manufactured according to the method defined above.
  • the spacer is folded to form at least two adjacent sides of the frame. It is understood that the folding is carried out around an axis extending in the lateral direction of the spacer.
  • the spacer comprises at least two absorbent units separated, in the longitudinal direction, by an interruption zone, and the spacer is folded at the level of said at least one interruption zone.
  • the moisture-absorbing structure comprises an absorbent unit extending continuously in the longitudinal direction of the spacer, at least a portion of said absorbent unit is removed prior to the folding step, so as to forming an interruption zone, and the spacer is folded at said at least one interruption zone.
  • At least two rectilinear spacers are assembled by mechanical assembly means, for example a connector inserted at a respective end of each spacer, so as to form two adjacent sides of the frame.
  • the at least one absorbent unit forming a moisture-absorbing structure can be fixed to the first or the second fixing part before or after formation of the frame.
  • the figure 1 shows a section of the periphery of an insulating glazing 1, here a double glazing, comprising an outer sheet of glass 2a, intended for example to face the outside of a building, an inner sheet of glass 2b, parallel to the outer sheet of glass 2a, and a spacer frame 3 extending continuously along the edge of the first and the second sheet of glass 2a, 2b, an internal sealed cavity 4 being delimited by the spacer frame between the two sheets of glass 2a, 2b.
  • a double glazing comprising an outer sheet of glass 2a, intended for example to face the outside of a building, an inner sheet of glass 2b, parallel to the outer sheet of glass 2a, and a spacer frame 3 extending continuously along the edge of the first and the second sheet of glass 2a, 2b, an internal sealed cavity 4 being delimited by the spacer frame between the two sheets of glass 2a, 2b.
  • the spacer frame 3 can be manufactured by successive folding of a straight spacer, or by angular assembly at their ends of straight spacers, so as to obtain a typically rectangular frame.
  • the spacer extends, at least in pieces, in a longitudinal direction parallel to an edge of the glazing.
  • the longitudinal direction is represented by the X axis.
  • the spacer 10 of the figure 1 comprises a first and a second fixing parts 12, 14 facing each other in a Y direction called the lateral direction of the spacer 10.
  • These fixing parts 12, 14 are typically made of metal , in particular aluminum or more preferably steel.
  • the first fixing part 12 here with a U-section, defines a first main fixing face 16a intended to be secured to the outer glass sheet 2a, and two returns extending laterally inwards 16b, 16c, on either side and on the other side of the first main fixing face 16a.
  • the second main fixing part 14 also of U-section, defines a first main fixing face 18a intended to be secured to the outer glass sheet 2a, and two returns extending laterally towards the inside 18b, 18c, of either side of the second main fixing face 18a.
  • the attachment to the glass sheets 2a, 2b is done, in a manner known per se, by at least one sealing bead respectively 5a, 5b forming bonding means, for example based on butyl.
  • a transverse direction Z of the spacer is defined as a direction orthogonal to the aforementioned longitudinal X and lateral Y directions.
  • the transverse direction Z is generally parallel to the main fixing faces 14a, 14b of the spacer 10.
  • the upper and lower adjectives used in the following are defined with respect to this transverse direction Z.
  • the upper elements are those oriented towards or closer to the internal cavity 4 of the glazing, in the mounted position of the window. spacer 10.
  • the lower elements are farther from the internal cavity 4 of the glazing, in the mounted position of the spacer 10.
  • the first and the second fastening parts 12, 14 are structurally linked together by a lower transverse part 20 and an upper transverse part 22 extending in the lateral direction Y and respectively forming the lower wall and the upper wall of the spacer 10.
  • each transverse part 20, 22 is glued at each of its lateral ends to a return 16b, 18b, respectively 16b, 18c of one of the fastening parts 12, 14.
  • the transverse parts 20, 22 delimit, with the first and second fixing parts 11, 12, an interior space 30 of the spacer 10.
  • the interior space 30 houses a moisture-absorbing structure 40, by definition self-supporting, formed of one or more absorbent units, each of finite dimensions.
  • the upper transverse part 22 of the spacer 10 is therefore not necessary like this could be the case in spacers of the prior art incorporating absorbent powders filling the interior space.
  • the function of the upper transverse portion 22 here is not to retain the absorbent structure 40. It is essentially aesthetic.
  • the structure 40 comprises an absorbent unit 41 in the form of a profile of rectangular constant section, extending in the longitudinal direction X of the spacer 10.
  • the absorbent unit 41 extends for at least 50%, preferably 80%, of the total length of the spacer, measured in its longitudinal direction X.
  • the section of the absorbent unit 41 measured in a plane orthogonal to the longitudinal direction X, is between 30 and 300 mm 2
  • width l1 measured in the lateral direction Y, is between 0.6 and 0.99 times the total width l of the spacer.
  • the structure 40 is not in contact with the second fixing part 14.
  • the absorbent structure 40 therefore does not form a thermal bridge between the two fixing parts 12, 14 of the spacer 10.
  • the structure 40 being free over a large majority of its periphery, it has a significant capacity for 'absorption.
  • the absorbent unit 41 is formed of a cohesive moisture-absorbing core 42, entirely solid.
  • FIG. 2 it is here formed of particles 44 of a moisture-absorbing material, in particular silica gel, bound by a hardened binder 46, in particular a plastic permeable to water vapour.
  • a moisture-absorbing material in particular silica gel
  • a hardened binder 46 in particular a plastic permeable to water vapour.
  • the absorbent unit 41 is for example obtained by preextrusion of the mixture of particles and binder forming the core 42.
  • the core 42 is fixed, by one of its sides (here a small side), to the first fixing part 12.
  • This fixing can take place by means of an adhesive 50, for example a hot-melt adhesive, as illustrated in the figure 1 .
  • a cohesive core 42 as defined above can be extruded directly onto one of the fixing parts 12, 14, to which it then adheres directly.
  • the spacer can thus have a different framework:
  • the first and second fixing parts can be formed in one piece with the lower transverse part, the spacer then having a main frame in one piece, U or C, plastic or metal, closed or not by an upper transverse part forming a cover.
  • the absorbent structure 40 can also take different forms:
  • the picture 3 thus illustrates another embodiment of a moisture-absorbing structure 140 in which, to prevent the release of particles 144 from the structure 140 into the internal space 4 of the glazing 1, the cohesive core 142 is surrounded by a casing 170, generally made of plastic, with a thickness comprised for example between 0.01 and 0.5 mm, permeable to water vapour.
  • the casing is preferably entirely closed, and covers the entire periphery as well as the longitudinal ends of the core 42.
  • the figure 4 illustrates yet another embodiment of a moisture-absorbing structure 240 having a pulverulent, friable, liquid, or pasty core 242, surrounded by a closed envelope, of thickness for example between 0.01 and 0.5 mm, permeable to water vapor, and usually plastic 270.
  • the absorbent structure 140, 240 is arranged so that it is not in contact with the transverse part.
  • the structure may be formed from a single absorbent unit of the type previously described, for example extending over substantially the entire length of the spacer in its longitudinal direction X.
  • the structure may be formed from a plurality of absorbent units which are preferably spaced in the longitudinal direction X by interruption zones. These interruption zones are preferably at least 2 mm in order to guarantee effective thermal separation.
  • the structure can be fixed to the fixing part 12, 14 either before or after securing the first and second fixing parts 12, 14 of the spacer 10.
  • the figures 5A to 5C thus illustrate a first embodiment of the method for manufacturing a spacer according to the invention, in which the moisture-absorbing structure comprises at least one absorbent unit formed of a cohesive core, deposited by extrusion on a part of spacer attachment.
  • the cohesive core 42 of an absorbent unit 41 is extruded onto the first free attachment part 12, that is to say not yet bonded to the second attachment part 14( figures 5A and 5B ).
  • first and second fixing parts 12, 14 are connected by means of the upper and lower transverse parts 20, 22, the core 42 being imprisoned in the interior space 30.
  • the figures 6A to 6C illustrate a second embodiment of the method for manufacturing a spacer according to the invention.
  • first and second fixing parts 12, 14 are secured together by means of the lower transverse part 20, with which they delimit the interior space 30.
  • the interior space 30 is open at its upper end, the upper transverse part 22 not yet being attached.
  • the cohesive core 42 of an absorbent unit 41 is then extruded directly onto the internal face of the first fastening part 12, through the upper opening of the interior space 30.
  • the upper transverse part 22 is fixed on the returns 16b, 18b of the first and second fixing parts 12, 14, closing the interior space 30 housing the core 42 ( Fig. 6C ).
  • the spacer frame 3 can be manufactured by successive folding of a straight spacer, or by angular assembly at their ends of straight spacers, so as to obtain a typically rectangular frame.
  • a structure 40 generally extends continuously over substantially the entire length of each spacer 10.
  • the spacers (typically four) 10a, 10b, 10c, 10d are then assembled by mechanical assembly means, for example four connectors 11 each inserted into two spacers intended to form two adjacent sides of frame 3.
  • the absorbent structure may comprise at least two absorbent units spaced apart from each other by an intermediate zone coinciding with the bending zone of the spacer.
  • the spacer 10 is generally provided, at each bending zone, with at least one through notch 60, with a constant V-shaped profile, the two facing edges of which form an angle of 90° between them.
  • the spacer advantageously comprises three notches, each intended to form a corner of the spacer frame.
  • the absorbent structure 40 advantageously comprises a plurality of absorbent units 41a, 41b, 41c, 41d spaced apart in the longitudinal direction X of the spacer 10 by interruption zones 43 coinciding with the notches 60.
  • Such an arrangement which emerges from the figure 8 , is particularly easy to obtain when the core 42 is extruded directly onto the fixing part 12.
  • the spacer On assembly, as shown in the figure 9 , the spacer is bent at right angles at each notch, and the two longitudinal ends of the spacer are joined, at the fourth corner, by a connector 11 of known type. Weld lines are finally made, at the junction of the edges of each notch, to restore the sealing of the first and second main fixing parts.
  • the spacer can also be manufactured with a single absorbent unit extending continuously over the entire length or substantially the entire length of the spacer, and at least a portion of said absorbent unit can be removed prior to the folding step, so as to form the interrupt zone or zones.
  • the notches 60 can optionally be cut at the same time as the absorbent unit.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
  • Joining Of Glass To Other Materials (AREA)

Description

Le présent exposé concerne un espaceur pour vitrage isolant et un procédé de fabrication d'un espaceur pour vitrage isolant.This presentation relates to a spacer for insulating glazing and a method of manufacturing a spacer for insulating glazing.

De manière connue, un vitrage isolant peut être obtenu en solidarisant un cadre espaceur rigide à la périphérie de deux feuilles de verre.In known manner, insulating glazing can be obtained by joining a rigid spacer frame to the periphery of two sheets of glass.

Le cadre espaceur est classiquement fabriqué soit par pliages successifs d'un espaceur droit, soit par assemblage angulaire à leurs extrémités d'espaceurs droits, de manière à obtenir par exemple un cadre rectangulaire.The spacer frame is conventionally manufactured either by successive folding of a straight spacer, or by angular assembly at their ends of straight spacers, so as to obtain, for example, a rectangular frame.

Le cadre espaceur délimite une cavité interne entre les feuilles de verre, ladite cavité formant une lame isolante d'air ou d'un gaz moins conducteur de la chaleur que l'air, par exemple de l'argon, qui permet de limiter les pertes dues à la conduction ou à la convection.The spacer frame delimits an internal cavity between the glass sheets, said cavity forming an insulating layer of air or of a gas that is less conductive of heat than air, for example argon, which makes it possible to limit losses. due to conduction or convection.

De façon habituelle, le cadre espaceur contient un produit absorbeur d'humidité, aussi appelé dessicant, destiné à absorber l'humidité présente à l'intérieur du vitrage, notamment juste après le montage du vitrage.Usually, the spacer frame contains a moisture-absorbing product, also called a desiccant, intended to absorb the moisture present inside the glazing, in particular just after the glazing has been fitted.

Dans les espaceurs creux à ossature fermée, du type décrit par exemple dans la demande de brevet WO2016/046081 , ce produit absorbeur d'humidité se présente typiquement sous la forme de poudre, remplissant l'espace intérieur de l'espaceur. Le produit pulvérulent est introduit dans l'espaceur par des orifices percés à cet effet dans l'ossature et rebouchés ensuite, généralement à l'aide de butyle. L'inconvénient de tels espaceurs est qu'ils présentent une conductivité thermique élevée liée à la conductivité thermique du produit absorbeur d'humidité qui remplit l'espace intérieur. La performance thermique des vitrages isolants intégrant ces espaceurs est donc limitée.In hollow spacers with a closed frame, of the type described for example in the patent application WO2016/046081 , this moisture-absorbing product is typically in the form of a powder, filling the interior space of the spacer. The pulverulent product is introduced into the spacer through orifices drilled for this purpose in the framework and then filled, generally using butyl. The disadvantage of such spacers is that they have a high thermal conductivity linked to the thermal conductivity of the moisture-absorbing product which fills the interior space. The thermal performance of insulating glazing incorporating these spacers is therefore limited.

La demande EP 1 860 270 décrit un type différent d'espaceur obtenu par extrusion. L'espaceur forme ici un cordon destiné à être fixé par collage aux feuilles de verre du vitrage et comprenant un coeur absorbeur d'humidité, coextrudé avec une enveloppe en silicone au moins en partie perméable à l'humidité. Mais ce type d'espaceur ne permet pas non plus d'obtenir des vitrages isolants présentant de bonnes performances thermiques.Requirement EP 1 860 270 describes a different type of spacer obtained by extrusion. The spacer here forms a bead intended to be fixed by gluing to the glass sheets of the glazing and comprising a moisture-absorbing core, coextruded with an at least partially moisture-permeable silicone shell. However, this type of spacer also does not make it possible to obtain insulating glazing units having good thermal performance.

La demande EP 3 184 725 A1 décrit un espaceur de vitrage isolant.Requirement EP 3 184 725 A1 describes an insulating glass spacer.

Le présent exposé vise à fournir un vitrage isolant et un procédé de fabrication d'un tel espaceur, permettant de remédier aux problèmes précités.The present presentation aims to provide an insulating glazing and a method of manufacturing such a spacer, making it possible to remedy the aforementioned problems.

Le présent exposé a ainsi pour objet un espaceur de vitrage isolant s'étendant dans une direction longitudinale et comprenant une première et une deuxième parties de fixation espacées l'une de l'autre dans une direction latérale et destinées à être solidarisées chacune à une feuille de verre du vitrage isolant par des moyens de fixation par collage, et au moins une partie transversale reliant lesdites première et deuxième parties de fixation et délimitant avec elles un espace intérieur, l'espaceur comprenant, dans l'espace intérieur, une structure absorbante d'humidité formée d'au moins une unité absorbante fixée à l'une parmi la première et la deuxième partie de fixation, l'autre parmi la première et la deuxième partie de fixation n'étant pas en contact avec l'unité absorbante.The subject of the present presentation is thus an insulating glazing spacer extending in a longitudinal direction and comprising a first and a second fixing parts spaced from each other in a lateral direction and intended to be secured each to a sheet of glass of the insulating glazing unit by adhesive fixing means, and at least one transverse part connecting said first and second fixing parts and delimiting with them an interior space, the spacer comprising, in the interior space, a structure absorbing heat wetness formed of at least one absorbent unit attached to one of the first and the second attachment part, the other of the first and the second attachment part not being in contact with the absorbent unit.

On comprend par structure un élément ou ensemble d'éléments « autosupporté » c'est-à-dire qu'il existe en tant que tel, indépendamment de tout support ou substrat, à l'inverse d'un revêtement ou d'une couche déposé(e) sur un substrat.Structure is understood to mean a “self-supporting” element or set of elements, that is to say that it exists as such, independently of any support or substrate, unlike a coating or a layer. deposited on a substrate.

La structure absorbante d'humidité de l'espaceur selon l'invention forme un élément ou un ensemble d'éléments compact(s), de dimensions finies.The moisture-absorbing structure of the spacer according to the invention forms a compact element or set of elements, of finite dimensions.

Le risque d'échappement de matière dans la cavité interne du vitrage est ainsi évité.The risk of material escaping into the internal cavity of the glazing is thus avoided.

Par ailleurs, chaque unité absorbante de la structure absorbante d'humidité restant à distance d'au moins l'une des parties de fixation, la structure n'influe pas sur la conductivité thermique de l'espaceur. Les performances thermiques de l'espaceur sont ainsi améliorées par rapport à celles d'espaceurs de l'art antérieur.Furthermore, each absorbent unit of the moisture-absorbing structure remaining at a distance from at least one of the fastening parts, the structure does not influence the thermal conductivity of the spacer. The thermal performance of the spacer is thus improved compared to that of prior art spacers.

Selon un exemple, l'unité absorbante est fixée par des moyens de collage, par exemple une colle thermofusible.According to one example, the absorbent unit is fixed by adhesive means, for example a hot-melt adhesive.

De préférence, la structure absorbante est agencée de sorte qu'elle ne soit pas en contact non plus avec la partie transversale.Preferably, the absorbent structure is arranged so that it is not in contact with the transverse part either.

La structure absorbante d'humidité peut comprendre une pluralité d'unités absorbantes qui sont de préférence espacées dans la direction longitudinale par des zones d'interruption. Ces zones d'interruption sont de préférence d'au moins 2 mm afin de garantir une séparation thermique efficace.The moisture absorbent structure may include a plurality of absorbent units which are preferably spaced apart in the longitudinal direction by gap areas. These interruption zones are preferably at least 2 mm in order to guarantee effective thermal separation.

Comme variante, la structure absorbante d'humidité peut comprendre une unité absorbante s'étendant de façon continue dans la direction longitudinale.Alternatively, the moisture absorbent structure may comprise an absorbent unit extending continuously in the longitudinal direction.

Selon un exemple, l'unité absorbante forme un profilé s'étendant dans la direction longitudinale. Par profilé, on entend un élément allongé, typiquement de section constante ou sensiblement constante, par exemple rectangulaire.According to one example, the absorbent unit forms a profile extending in the longitudinal direction. By profile is meant an elongated element, typically of constant or substantially constant section, for example rectangular.

De façon générale, la structure absorbante s'étend sur au moins 50%, de préférence au moins 80%, de la longueur totale de l'espaceur, mesurée dans sa direction longitudinale.Generally, the absorbent structure extends over at least 50%, preferably at least 80%, of the total length of the spacer, measured in its longitudinal direction.

Selon un exemple, la section de l'unité absorbante, mesurée dans un plan orthogonal à la direction longitudinale, est comprise entre 30 et 300 mm2 According to one example, the section of the absorbent unit, measured in a plane orthogonal to the longitudinal direction, is between 30 and 300 mm 2

Selon un exemple, la largeur de l'unité absorbante, mesurée dans la direction latérale, est comprise entre 0,6 et 0,99 fois la largeur totale de l'espaceur.According to one example, the width of the absorbent unit, measured in the lateral direction, is between 0.6 and 0.99 times the total width of the spacer.

Comme il sera décrit plus en détail dans la suite, l'unité absorbante d'humidité peut être formée

  • soit d'un noyau cohésif, éventuellement mais non nécessairement protégé par une enveloppe fermée perméable à la vapeur d'eau,
  • soit d'un noyau pulvérulent, friable, liquide, ou pâteux nécessairement conditionné dans une enveloppe fermée perméable à la vapeur d'eau.
As will be described in more detail hereinafter, the moisture absorbing unit may be formed
  • either a cohesive core, optionally but not necessarily protected by a closed envelope permeable to water vapour,
  • either a powdery, crumbly, liquid or pasty core necessarily packaged in a closed envelope permeable to water vapour.

De façon générale, l'unité absorbante comprend au moins un matériau absorbeur d'humidité. Par matériau absorbeur d'humidité, on entend

  • soit des matériaux poreux, aussi appelés tamis moléculaires, agissant physiquement sur la vapeur d'eau, en l'emprisonnant dans ses pores (les pores de ce type de matériaux sont généralement de très petite taille, de l'ordre de 3 à 4 Angströms), par exemple une zéolithe, un gel de silice, une argile (notamment de la montmorillonite), du charbon activé,
  • soit des matériaux poreux agissant chimiquement, en réagissant avec la vapeur d'eau, par exemple du sulfate de calcium, du chlorure de calcium.
Generally, the absorbent unit includes at least one moisture-absorbing material. By moisture-absorbing material is meant
  • or porous materials, also called molecular sieves, which physically act on water vapour, trapping it in their pores (the pores of this type of material are generally very small, around 3 to 4 Angstroms ), for example a zeolite, a silica gel, a clay (in particular montmorillonite), activated carbon,
  • or porous materials which act chemically, by reacting with water vapour, for example calcium sulphate, calcium chloride.

L'unité absorbante peut aussi comprendre une combinaison de plusieurs matériaux absorbants choisis parmi l'une des ou les deux catégories précitées.The absorbent unit can also comprise a combination of several absorbent materials chosen from one or both of the aforementioned categories.

Selon un exemple, l'unité absorbante comprend un noyau cohésif formé de particules d'au moins un matériau absorbeur d'humidité, liées par un liant.According to one example, the absorbent unit comprises a cohesive core formed of particles of at least one moisture-absorbing material, bound by a binder.

Le liant peut être toute matière plastique perméable à la vapeur d'eau. Le liant ne contient de préférence aucun matériau volatile.The binder can be any plastic material permeable to water vapour. The binder preferably does not contain any volatile material.

Le liant peut ainsi comprendre du polypropylène (PP), du polyéthylène (PE), du polyéthlènetéréphtalate (PET), du polyméthylacrylate (PMMA), du polycarbonate (PC), du polyamide (PA), du polyvinylchloride (PVC), du polystyrène (PS) et/ou autres polymères styréniques, des copolymères (par exemple ABS, SAN, ASA, etc.) ou toute combinaison adaptée des éléments précités.The binder can thus comprise polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polymethylacrylate (PMMA), polycarbonate (PC), polyamide (PA), polyvinylchloride (PVC), polystyrene ( PS) and/or other styrenic polymers, copolymers (for example ABS, SAN, ASA, etc.) or any suitable combination of the aforementioned elements.

Selon une disposition avantageuse, le noyau cohésif de l'unité absorbante est entouré d'une enveloppe fermée perméable à la vapeur d'eau. L'enveloppe évite que des particules ne se détachent et viennent polluer la cavité interne du vitrage. Elle est généralement en plastique.According to an advantageous arrangement, the cohesive core of the absorbent unit is surrounded by a closed envelope permeable to water vapour. The envelope prevents particles from becoming detached and polluting the internal cavity of the glazing. It is usually plastic.

Selon un autre exemple de réalisation, l'unité absorbante comprend un noyau absorbeur d'humidité pulvérulent, friable, liquide, ou pâteux, par exemple une poudre ou un gel de silice, entouré d'une enveloppe fermée perméable à la vapeur d'eau. Dans ce cas également, l'enveloppe est généralement en plastique.According to another exemplary embodiment, the absorbent unit comprises a powdery, friable, liquid, or pasty, for example a powder or a silica gel, surrounded by a closed envelope permeable to water vapour. Also in this case, the envelope is generally made of plastic.

Le présent exposé concerne également un procédé de fabrication d'un espaceur pour vitrage isolant s'étendant dans une direction longitudinale et comprenant une première et une deuxième parties de fixation espacées l'une de l'autre dans une direction latérale et destinées à être solidarisées chacune à une feuille de verre du vitrage isolant par des moyens de fixation par collage, et au moins une partie transversale reliant lesdites première et deuxième parties de fixation et délimitant avec elles un espace intérieur, le procédé comprenant la fixation d'au moins une unité absorbante formant une structure absorbante d'humidité, à l'une parmi la première et la deuxième partie de fixation, l'autre parmi la première et la deuxième partie de fixation n'étant pas en contact avec l'unité absorbante. Ladite structure absorbante est un élément ou ensemble d'éléments autosupporté.This presentation also relates to a method of manufacturing a spacer for insulating glazing extending in a longitudinal direction and comprising a first and a second fixing parts spaced from each other in a lateral direction and intended to be secured each to a sheet of glass of the insulating glazing by means of fixing by bonding, and at least one transverse part connecting said first and second fixing parts and delimiting with them an interior space, the method comprising the fixing of at least one unit absorbent forming a moisture absorbing structure, to one of the first and the second fastening part, the other of the first and the second fastening part not being in contact with the absorbent unit. Said absorbent structure is a self-supporting element or set of elements.

Selon un exemple de mise en œuvre, l'unité absorbante est préextrudée, puis fixée sur la première ou la deuxième partie de fixation.According to an exemplary implementation, the absorbent unit is preextruded, then attached to the first or the second attachment part.

Selon une disposition avantageuse, l'unité absorbante préextrudée est entourée d'une enveloppe fermée perméable à la vapeur d'eau avant d'être fixée sur la première ou la deuxième partie de fixation.According to an advantageous arrangement, the preextruded absorbent unit is surrounded by a closed envelope permeable to water vapor before being attached to the first or second attachment part.

L'unité absorbante peut par exemple être fixée par collage, par exemple au moyen d'une colle thermofusible.The absorbent unit can for example be fixed by gluing, for example by means of a hot-melt adhesive.

Selon un autre exemple de mise en oeuvre, l'unité absorbante est extrudée directement sur la première ou la deuxième partie de fixation.According to another example of implementation, the absorbent unit is extruded directly on the first or the second fastening part.

Selon un exemple, l'unité absorbante est fixée à la première ou la deuxième partie de fixation après solidarisation entre elles des première et deuxième parties de fixation. Autrement dit, la première et la deuxième parties de fixation sont reliées à la partie transversale, de façon à former l'espace intérieur, puis l'unité absorbante est fixée à l'une des parties de fixation de l'espaceur.According to one example, the absorbent unit is fixed to the first or the second fixing part after securing together the first and second fixing parts. In other words, the first and the second fixing parts are connected to the transverse part, so as to form the interior space, and then the absorbent unit is fixed to one of the fixing parts of the spacer.

Selon un autre exemple, l'unité absorbante est fixée à la première ou la deuxième partie de fixation avant solidarisation entre elles des première et deuxième parties de fixation. Dans ce cas, par exemple, l'unité absorbante est fixée à la première partie de fixation, puis cette partie est reliée à la deuxième partie de fixation par l'intermédiaire de la partie transversale.According to another example, the absorbent unit is fixed to the first or the second fixing part before joining together the first and second fixing parts. In this case, for example, the absorbent unit is fixed to the first fixing part, then this part is connected to the second fixing part via the transverse part.

Le présent exposé concerne enfin un procédé de fabrication d'un cadre espaceur pour vitrage isolant comprenant au moins un espaceur tel que défini précédemment ou fabriqué selon le procédé défini précédemment.This presentation finally relates to a method of manufacturing a spacer frame for insulating glazing comprising at least one spacer as defined above or manufactured according to the method defined above.

Selon un exemple, l'espaceur est plié pour former au moins deux côtés adjacents du cadre. On comprend que le pliage est réalisé autour d'un axe s'étendant dans la direction latérale de l'espaceur.According to one example, the spacer is folded to form at least two adjacent sides of the frame. It is understood that the folding is carried out around an axis extending in the lateral direction of the spacer.

Selon un exemple, l'espaceur comporte au moins deux unités absorbantes séparées, dans la direction longitudinale, par une zone d'interruption, et l'espaceur est plié au niveau de ladite au moins une zone d'interruption.According to one example, the spacer comprises at least two absorbent units separated, in the longitudinal direction, by an interruption zone, and the spacer is folded at the level of said at least one interruption zone.

Selon un exemple, la structure absorbante d'humidité comprend une unité absorbante s'étendant de façon continue dans la direction longitudinale de l'espaceur, au moins une portion de ladite unité absorbante est supprimée préalablement à l'étape de pliage, de façon à former une zone d'interruption, et l'espaceur est plié au niveau de ladite au moins une zone d'interruption.According to one example, the moisture-absorbing structure comprises an absorbent unit extending continuously in the longitudinal direction of the spacer, at least a portion of said absorbent unit is removed prior to the folding step, so as to forming an interruption zone, and the spacer is folded at said at least one interruption zone.

Selon un exemple, au moins deux espaceurs rectilignes sont assemblés par des moyens d'assemblage mécanique, par exemple un connecteur inséré à une extrémité respective de chaque espaceur, de façon à former deux côtés adjacents du cadre.According to one example, at least two rectilinear spacers are assembled by mechanical assembly means, for example a connector inserted at a respective end of each spacer, so as to form two adjacent sides of the frame.

A noter par ailleurs que la au moins une unité absorbante formant structure absorbante d'humidité peut être fixée à la première ou la deuxième partie de fixation avant ou après formation du cadre.It should also be noted that the at least one absorbent unit forming a moisture-absorbing structure can be fixed to the first or the second fixing part before or after formation of the frame.

Plusieurs modes ou exemples de réalisation sont décrits dans le présent exposé. Sauf précision contraire, les caractéristiques décrites en relation avec un mode ou un exemple de réalisation quelconque peuvent être appliquées à un autre mode ou exemple de réalisation.Several embodiments or exemplary embodiments are described in this presentation. Unless otherwise specified, the characteristics described in relation to any mode or example of embodiment can be applied to another mode or example of embodiment.

L'invention dans ses détails sera mieux comprise à la lecture de la description qui suit de plusieurs modes de réalisation. Dans le cadre de la présente invention, d'autres modes de réalisation sont bien entendu possibles, la description qui suit étant uniquement fournie à titre d'illustration et ne devant être considérée comme limitative sous aucun de ses aspects décrits.

  • La figure 1 est une vue en coupe transversale d'un espaceur selon un mode de réalisation, monté entre deux feuilles de verre d'un vitrage isolant ;
  • La figure 2 illustre un premier exemple de structure absorbante d'humidité pouvant être utilisée selon l'invention ;
  • La figure 3 illustre un autre exemple de structure absorbante d'humidité pouvant être utilisée selon l'invention ;
  • La figure 4 illustre un autre exemple de structure absorbante d'humidité pouvant être utilisée selon l'invention ;
  • Les figures 5A à 5C illustrent les étapes successives de fabrication d'un espaceur selon un mode de mise en œuvre de l'invention ;
  • Les figures 6A à 6C illustrent les étapes successives de fabrication d'un espaceur selon un autre mode de mise en œuvre de l'invention ;
  • La figure 7 montre schématiquement la formation d'un cadre espaceur à partir d'une pluralité d'espaceurs selon l'invention, assemblés mécaniquement ;
  • La figure 8 est une vue en coupe longitudinale d'un espaceur selon l'invention, avant pliage,
  • La figure 9 montre la formation d'un cadre espaceur par pliage de l'espaceur de la figure 8.
The invention in its details will be better understood on reading the following description of several embodiments. In the context of the present invention, other embodiments are of course possible, the following description being provided solely by way of illustration and should not be considered as limiting in any of its described aspects.
  • The figure 1 is a cross-sectional view of a spacer according to one embodiment, mounted between two sheets of glass of an insulating glazing unit;
  • The figure 2 illustrates a first example of a moisture-absorbing structure that can be used according to the invention;
  • The picture 3 illustrates another example of a moisture-absorbing structure that can be used according to the invention;
  • The figure 4 illustrates another example of a moisture-absorbing structure that can be used according to the invention;
  • The figures 5A to 5C illustrate the successive steps for manufacturing a spacer according to one embodiment of the invention;
  • The figures 6A to 6C illustrate the successive steps for manufacturing a spacer according to another embodiment of the invention;
  • The figure 7 schematically shows the formation of a spacer frame from a plurality of spacers according to the invention, mechanically assembled;
  • The figure 8 is a view in longitudinal section of a spacer according to the invention, before folding,
  • The figure 9 shows the formation of a spacer frame by bending the spacer of the figure 8 .

La figure 1 montre une section de la périphérie d'un vitrage isolant 1, ici un double vitrage, comprenant une feuille de verre extérieure 2a, destinée par exemple à être tournée vers l'extérieur d'un bâtiment, une feuille de verre intérieure 2b, parallèle à la feuille de verre extérieure 2a, et un cadre espaceur 3 s'étendant continument le long du bord de la première et de la deuxième feuille de verre 2a, 2b, une cavité interne 4 étanche étant délimitée par le cadre espaceur entre les deux feuilles de verre 2a, 2b.The figure 1 shows a section of the periphery of an insulating glazing 1, here a double glazing, comprising an outer sheet of glass 2a, intended for example to face the outside of a building, an inner sheet of glass 2b, parallel to the outer sheet of glass 2a, and a spacer frame 3 extending continuously along the edge of the first and the second sheet of glass 2a, 2b, an internal sealed cavity 4 being delimited by the spacer frame between the two sheets of glass 2a, 2b.

Le cadre espaceur 3 peut être fabriqué par pliages successifs d'un espaceur droit, ou par assemblage angulaire à leurs extrémités d'espaceurs droits, de manière à obtenir un cadre typiquement rectangulaire.The spacer frame 3 can be manufactured by successive folding of a straight spacer, or by angular assembly at their ends of straight spacers, so as to obtain a typically rectangular frame.

L'espaceur s'étend, au moins par morceaux, dans une direction longitudinale parallèle à un bord du vitrage. Sur la figure 1, la direction longitudinale est représentée par l'axe X.The spacer extends, at least in pieces, in a longitudinal direction parallel to an edge of the glazing. On the figure 1 , the longitudinal direction is represented by the X axis.

L'espaceur 10 de la figure 1 comprend une première et une deuxième parties de fixation 12, 14 en vis-à-vis l'une de l'autre dans une direction Y dite direction latérale de l'espaceur 10. Ces parties de fixation 12, 14 sont typiquement réalisées en métal, notamment en aluminium ou plus préférentiellement en acier.The spacer 10 of the figure 1 comprises a first and a second fixing parts 12, 14 facing each other in a Y direction called the lateral direction of the spacer 10. These fixing parts 12, 14 are typically made of metal , in particular aluminum or more preferably steel.

La première partie de fixation 12, ici à section en U, définit une première face principale de fixation 16a destinée à être solidarisée à la feuille de verre extérieure 2a, et deux retours s'étendant latéralement vers l'intérieur 16b, 16c, de part et d'autre de la première face principale de fixation 16a.The first fixing part 12, here with a U-section, defines a first main fixing face 16a intended to be secured to the outer glass sheet 2a, and two returns extending laterally inwards 16b, 16c, on either side and on the other side of the first main fixing face 16a.

La deuxième partie principale de fixation 14, également à section en U, définit une première face principale de fixation 18a destinée à être solidarisée à la feuille de verre extérieure 2a, et deux retours s'étendant latéralement vers l'intérieur 18b, 18c, de part et d'autre de la deuxième face principale de fixation 18a.The second main fixing part 14, also of U-section, defines a first main fixing face 18a intended to be secured to the outer glass sheet 2a, and two returns extending laterally towards the inside 18b, 18c, of either side of the second main fixing face 18a.

La solidarisation aux feuilles de verre 2a, 2b se fait, de façon connue en soi, par au moins un cordon d'étanchéité respectivement 5a, 5b formant moyen de collage, par exemple à base de butyle.The attachment to the glass sheets 2a, 2b is done, in a manner known per se, by at least one sealing bead respectively 5a, 5b forming bonding means, for example based on butyl.

Pour toute la présente demande, on définit une direction transversale Z de l'espaceur comme une direction orthogonale aux directions longitudinale X et latérale Y précitées. La direction transversale Z est généralement parallèle aux faces principales de fixation 14a, 14b de l'espaceur 10.Throughout the present application, a transverse direction Z of the spacer is defined as a direction orthogonal to the aforementioned longitudinal X and lateral Y directions. The transverse direction Z is generally parallel to the main fixing faces 14a, 14b of the spacer 10.

Comme expliqué précédemment et sauf indication contraire, les adjectifs supérieur et inférieur utilisés dans la suite se définissent par rapport à cette direction transversale Z. Les éléments supérieurs sont ceux orientés vers ou plus proches de la cavité interne 4 du vitrage, en position montée de l'espaceur 10. Les éléments inférieurs sont plus éloignés de la cavité interne 4 du vitrage, en position montée de l'espaceur 10.As explained previously and unless otherwise indicated, the upper and lower adjectives used in the following are defined with respect to this transverse direction Z. The upper elements are those oriented towards or closer to the internal cavity 4 of the glazing, in the mounted position of the window. spacer 10. The lower elements are farther from the internal cavity 4 of the glazing, in the mounted position of the spacer 10.

Comme illustré sur la figure 1, la première et la deuxième parties de fixation 12, 14 sont structurellement liées entre elles par une partie transversale inférieure 20 et une partie transversale supérieure 22 s'étendant dans la direction latérale Y et formant respectivement la paroi inférieure et la paroi supérieure de l'espaceur 10.As illustrated on the figure 1 , the first and the second fastening parts 12, 14 are structurally linked together by a lower transverse part 20 and an upper transverse part 22 extending in the lateral direction Y and respectively forming the lower wall and the upper wall of the spacer 10.

Essentiellement en matière plastique, elles jouent un rôle d'isolant, limitant les échanges thermiques entre la feuille de verre extérieure 2a et la feuille de verre intérieure 2b.Essentially made of plastic material, they act as an insulator, limiting heat exchange between the outer glass sheet 2a and the inner glass sheet 2b.

Dans l'exemple, chaque partie transversale 20, 22 est collée à chacune des ses extrémités latérales à un retour 16b, 18b, respectivement 16b, 18c de l'une des parties de fixation 12, 14.In the example, each transverse part 20, 22 is glued at each of its lateral ends to a return 16b, 18b, respectively 16b, 18c of one of the fastening parts 12, 14.

Les parties transversales 20, 22 délimitent, avec les première et deuxième parties de fixation 11, 12, un espace intérieur 30 de l'espaceur 10.The transverse parts 20, 22 delimit, with the first and second fixing parts 11, 12, an interior space 30 of the spacer 10.

Selon l'invention, l'espace intérieur 30 abrite une structure absorbante d'humidité 40, par définition autoportante, formée d'une ou plusieurs unités absorbantes, chacune de dimensions finies.According to the invention, the interior space 30 houses a moisture-absorbing structure 40, by definition self-supporting, formed of one or more absorbent units, each of finite dimensions.

On comprend que la partie transversale supérieure 22 de l'espaceur 10 n'est par conséquent pas nécessaire comme cela pouvait être le cas dans des espaceurs de l'art antérieur intégrant des poudres absorbantes remplissant l'espace intérieur. La fonction de la partie transversale supérieure 22 ici n'est pas de retenir la structure absorbante 40. Elle est essentiellement esthétique.It is understood that the upper transverse part 22 of the spacer 10 is therefore not necessary like this could be the case in spacers of the prior art incorporating absorbent powders filling the interior space. The function of the upper transverse portion 22 here is not to retain the absorbent structure 40. It is essentially aesthetic.

Dans l'exemple des figures 1 et 2, la structure 40 comporte une unité absorbante 41 sous la forme d'un profilé de section constante rectangulaire, s'étendant dans la direction longitudinale X de l'espaceur 10.In the example of figures 1 and 2 , the structure 40 comprises an absorbent unit 41 in the form of a profile of rectangular constant section, extending in the longitudinal direction X of the spacer 10.

De préférence, l'unité absorbante 41 s'étend sur au moins 50%, de préférence 80%, de la longueur totale de l'espaceur, mesurée dans sa direction longitudinale X.Preferably, the absorbent unit 41 extends for at least 50%, preferably 80%, of the total length of the spacer, measured in its longitudinal direction X.

La section de l'unité absorbante 41, mesurée dans un plan orthogonal à la direction longitudinale X, est comprise entre 30 et 300 mm2 The section of the absorbent unit 41, measured in a plane orthogonal to the longitudinal direction X, is between 30 and 300 mm 2

Sa largeur 11, mesurée dans la direction latérale Y, est comprise entre 0,6 et 0,99 fois la largeur totale l de l'espaceur.Its width l1, measured in the lateral direction Y, is between 0.6 and 0.99 times the total width l of the spacer.

Comme illustré sur la figure 1, la structure 40 n'est pas en contact avec la deuxième partie de fixation 14.As illustrated on the figure 1 , the structure 40 is not in contact with the second fixing part 14.

La structure absorbante 40 ne forme donc pas de pont thermique entre les deux parties de fixation 12, 14 de l'espaceur 10. D'autre part, la structure 40 étant libre sur une grande majorité de sa périphérie, elle présente une capacité importante d'absorption.The absorbent structure 40 therefore does not form a thermal bridge between the two fixing parts 12, 14 of the spacer 10. On the other hand, the structure 40 being free over a large majority of its periphery, it has a significant capacity for 'absorption.

Dans l'exemple, l'unité absorbante 41 est formée d'un noyau cohésif absorbeur d'humidité 42, entièrement solide.In the example, the absorbent unit 41 is formed of a cohesive moisture-absorbing core 42, entirely solid.

Comme illustré sur la figure 2, il est ici formé de particules 44 d'un matériau absorbeur d'humidité, notamment du gel de silice, liées par un liant durci 46, notamment un plastique perméable à la vapeur d'eau.As illustrated on the figure 2 , it is here formed of particles 44 of a moisture-absorbing material, in particular silica gel, bound by a hardened binder 46, in particular a plastic permeable to water vapour.

L'unité absorbante 41 est par exemple obtenue par préextrusion du mélange de particules et de liant formant le noyau 42.The absorbent unit 41 is for example obtained by preextrusion of the mixture of particles and binder forming the core 42.

Une fois durci, le noyau 42 est fixé, par l'un des ses côtés (ici un petit côté), à la première partie de fixation 12. Cette fixation peut s'opérer au moyen d'une colle 50, par exemple une colle thermofusible, comme illustré sur la figure 1.Once hardened, the core 42 is fixed, by one of its sides (here a small side), to the first fixing part 12. This fixing can take place by means of an adhesive 50, for example a hot-melt adhesive, as illustrated in the figure 1 .

Selon un autre exemple de mise en œuvre, un noyau cohésif 42 tel que défini précédemment peut être extrudé directement sur l'une des parties de fixation 12, 14, à laquelle il adhère alors directement.According to another example of implementation, a cohesive core 42 as defined above can be extruded directly onto one of the fixing parts 12, 14, to which it then adheres directly.

L'exemple des figures 1 et 2 n'est toutefois pas limitatif :
L'espaceur peut ainsi présenter une ossature différente :
Par exemple, les première et deuxième parties de fixation peuvent être formées en une seule pièce avec la partie transversale inférieure, l'espaceur présentant alors une ossature principale d'un seul tenant, en U ou en C, , en plastique ou en métal, fermée ou non par une partie transversale supérieure formant cache.The example of figures 1 and 2 is however not limiting:
The spacer can thus have a different framework:
For example, the first and second fixing parts can be formed in one piece with the lower transverse part, the spacer then having a main frame in one piece, U or C, plastic or metal, closed or not by an upper transverse part forming a cover.

La structure absorbante 40 peut aussi se présenter sous des formes différentes :
La figure 3 illustre ainsi un autre exemple de réalisation d'une structure absorbante d'humidité 140 dans laquelle, pour éviter la libération de particules 144 issues de la structure 140 dans l'espace interne 4 du vitrage 1, le noyau cohésif 142 est entouré d'une enveloppe 170, généralement en plastique, d'épaisseur comprise par exemple entre 0,01 et 0,5 mm, perméable à la vapeur d'eau. Dans ce cas, l'enveloppe est de préférence entièrement fermée, et couvre toute la périphérie ainsi que les extrémités longitudinales du noyau 42.The absorbent structure 40 can also take different forms:
The picture 3 thus illustrates another embodiment of a moisture-absorbing structure 140 in which, to prevent the release of particles 144 from the structure 140 into the internal space 4 of the glazing 1, the cohesive core 142 is surrounded by a casing 170, generally made of plastic, with a thickness comprised for example between 0.01 and 0.5 mm, permeable to water vapour. In this case, the casing is preferably entirely closed, and covers the entire periphery as well as the longitudinal ends of the core 42.

La figure 4 illustre encore un autre exemple de réalisation d'une structure absorbante d'humidité 240 présentant un noyau pulvérulent, friable, liquide, ou pâteux 242, entouré d'une enveloppe fermée, d'épaisseur comprise par exemple entre 0,01 et 0,5 mm, perméable à la vapeur d'eau, et généralement en plastique 270.The figure 4 illustrates yet another embodiment of a moisture-absorbing structure 240 having a pulverulent, friable, liquid, or pasty core 242, surrounded by a closed envelope, of thickness for example between 0.01 and 0.5 mm, permeable to water vapor, and usually plastic 270.

Dans ces deux cas (figures 3 et 4), c'est l'enveloppe 170, 270 qui est fixée à la partie de fixation 12, 14 de l'espaceur 10, par collage.In these two cases ( figures 3 and 4 ), it is the casing 170, 270 which is fixed to the fixing part 12, 14 of the spacer 10, by gluing.

De préférence, la structure absorbante 140, 240 est agencée de sorte qu'elle ne soit pas en contact avec la partie transversale.Preferably, the absorbent structure 140, 240 is arranged so that it is not in contact with the transverse part.

La structure peut être formée d'une seule unité absorbante du type décrit précédemment, s'étendant par exemple sur sensiblement toute la longueur de l'espaceur dans sa direction longitudinale X. Comme variante, toutefois, la structure peut être formée d'une pluralité d'unités absorbantes qui sont de préférence espacées dans la direction longitudinale X par des zones d'interruption. Ces zones d'interruption sont de préférence d'au moins 2 mm afin de garantir une séparation thermique efficace.The structure may be formed from a single absorbent unit of the type previously described, for example extending over substantially the entire length of the spacer in its longitudinal direction X. Alternatively, however, the structure may be formed from a plurality of absorbent units which are preferably spaced in the longitudinal direction X by interruption zones. These interruption zones are preferably at least 2 mm in order to guarantee effective thermal separation.

Qu'elle comprenne un ou plusieurs noyau(x) cohésif(s) entouré(s) ou non par une enveloppe perméable, ou un ou plusieurs noyau(x) non cohésifs entouré(s) par une enveloppe perméable, la structure peut être fixée à la partie de fixation 12, 14 soit avant, soit après solidarisation des première et deuxième parties de fixation 12, 14 de l'espaceur 10.Whether it comprises one or more cohesive core(s) surrounded or not by a permeable envelope, or one or more non-cohesive core(s) surrounded by a permeable envelope, the structure can be fixed to the fixing part 12, 14 either before or after securing the first and second fixing parts 12, 14 of the spacer 10.

Les figures 5A à 5C illustrent ainsi un premier mode de mise en œuvre du procédé de fabrication d'un espaceur selon l'invention, dans lequel la structure absorbante d'humidité comprend au moins une unité absorbante formée d'un noyau cohésif, déposé par extrusion sur une partie de fixation de l'espaceur.The figures 5A to 5C thus illustrate a first embodiment of the method for manufacturing a spacer according to the invention, in which the moisture-absorbing structure comprises at least one absorbent unit formed of a cohesive core, deposited by extrusion on a part of spacer attachment.

Dans cet exemple, le noyau cohésif 42 d'une unité absorbante 41 est extrudé sur la première partie de fixation 12 libre, c'est-à-dire non encore liée à la deuxième partie de fixation 14(figure 5A et 5B).In this example, the cohesive core 42 of an absorbent unit 41 is extruded onto the first free attachment part 12, that is to say not yet bonded to the second attachment part 14( figures 5A and 5B ).

Dans un second temps, les première et deuxième parties de fixation 12, 14 sont reliées au moyen des parties transversales supérieure et inférieure 20, 22, le noyau 42 étant emprisonné dans l'espace intérieur 30.Secondly, the first and second fixing parts 12, 14 are connected by means of the upper and lower transverse parts 20, 22, the core 42 being imprisoned in the interior space 30.

Les figures 6A à 6C illustrent un second mode de mise en œuvre du procédé de fabrication d'un espaceur selon l'invention.The figures 6A to 6C illustrate a second embodiment of the method for manufacturing a spacer according to the invention.

Sur la figure 6A, les première et deuxième parties de fixation 12, 14 sont solidarisées entre elles par le biais de la partie transversale inférieure 20, avec laquelle elles délimitent l'espace intérieur 30.On the Figure 6A , the first and second fixing parts 12, 14 are secured together by means of the lower transverse part 20, with which they delimit the interior space 30.

L'espace intérieur 30 est ouvert à son extrémité supérieure, la partie transversale supérieure 22 n'étant pas encore rapportée.The interior space 30 is open at its upper end, the upper transverse part 22 not yet being attached.

Le noyau cohésif 42 d'une unité absorbante 41 est alors extrudé directement sur la face interne de la première partie de fixation 12, à travers l'ouverture supérieure de l'espace intérieur 30.The cohesive core 42 of an absorbent unit 41 is then extruded directly onto the internal face of the first fastening part 12, through the upper opening of the interior space 30.

Enfin, la partie transversale supérieure 22 est fixée sur les retours 16b, 18b des première et deuxième parties de fixation 12, 14, refermant l'espace intérieur 30 abritant le noyau 42 (figure 6C).Finally, the upper transverse part 22 is fixed on the returns 16b, 18b of the first and second fixing parts 12, 14, closing the interior space 30 housing the core 42 ( Fig. 6C ).

Comme expliqué précédemment, le cadre espaceur 3 peut être fabriqué par pliages successifs d'un espaceur droit, ou par assemblage angulaire à leurs extrémités d'espaceurs droits, de manière à obtenir un cadre typiquement rectangulaire.As explained previously, the spacer frame 3 can be manufactured by successive folding of a straight spacer, or by angular assembly at their ends of straight spacers, so as to obtain a typically rectangular frame.

Dans le cas d'un assemblage angulaire d'espaceurs droits 10a, 10b, 10c, 10d tel qu'illustré par la figure 7, une structure 40 s'étend généralement de façon continue sur sensiblement toute la longueur de chaque espaceur 10. Les espaceurs (typiquement, quatre) 10a, 10b, 10c, 10d sont ensuite assemblés par des moyens d'assemblage mécanique, par exemple quatre connecteurs 11 insérés chacun dans deux espaceurs destinés à former deux côtés adjacents du cadre 3.In the case of an angular assembly of straight spacers 10a, 10b, 10c, 10d as illustrated by the figure 7 , a structure 40 generally extends continuously over substantially the entire length of each spacer 10. The spacers (typically four) 10a, 10b, 10c, 10d are then assembled by mechanical assembly means, for example four connectors 11 each inserted into two spacers intended to form two adjacent sides of frame 3.

Dans le cas du pliage à angle droit d'un espaceur destiné à former au moins deux côté du cadre espaceur 3, il peut être avantageux que la structure absorbante comporte au moins deux unités absorbantes espacées l'une de l'autre par une zone intermédiaire coincidant avec la zone de pliage de l'espaceur.In the case of folding at right angles of a spacer intended to form at least two sides of the spacer frame 3, it may be advantageous for the absorbent structure to comprise at least two absorbent units spaced apart from each other by an intermediate zone coinciding with the bending zone of the spacer.

Comme illustré sur la figure 8, l'espaceur 10 est généralement muni, au niveau de chaque zone de pliage, d'au moins une entaille traversante 60, à profil constant en V dont les deux bords en regard forment entre eux un angle de 90°.As illustrated on the figure 8 , the spacer 10 is generally provided, at each bending zone, with at least one through notch 60, with a constant V-shaped profile, the two facing edges of which form an angle of 90° between them.

Pour la fabrication d'un vitrage rectangulaire, et comme illustré sur la figure, l'espaceur comporte avantageusement trois entailles, destinées à former chacune un coin du cadre espaceur. Dans ce cas, la structure absorbante 40 comprend avantageusement une pluralité d'unités absorbantes 41a, 41b, 41c, 41d espacées dans la direction longitudinale X de l'espaceur 10 par des zones d'interruption 43 coïncidant avec les entailles 60. Un tel agencement, qui ressort de la figure 8, est particulièrement aisé à obtenir lorsque le noyau 42 est extrudé directement sur la partie de fixation 12.For the manufacture of rectangular glazing, and as illustrated in the figure, the spacer advantageously comprises three notches, each intended to form a corner of the spacer frame. In this case, the absorbent structure 40 advantageously comprises a plurality of absorbent units 41a, 41b, 41c, 41d spaced apart in the longitudinal direction X of the spacer 10 by interruption zones 43 coinciding with the notches 60. Such an arrangement , which emerges from the figure 8 , is particularly easy to obtain when the core 42 is extruded directly onto the fixing part 12.

Au montage, comme illustré sur la figure 9, l'espaceur est plié à angle droit au niveau de chaque entaille, et les deux extrémités longitudinales de l'espaceur sont jointes, au quatrième coin, par un connecteur 11 de type connu. Des lignes de soudure sont enfin réalisées, à la jonction des bords de chaque entaille, pour rétablir l'étanchéité des premières et deuxièmes parties principales de fixation.On assembly, as shown in the figure 9 , the spacer is bent at right angles at each notch, and the two longitudinal ends of the spacer are joined, at the fourth corner, by a connector 11 of known type. Weld lines are finally made, at the junction of the edges of each notch, to restore the sealing of the first and second main fixing parts.

Selon un autre exemple de mise en œuvre, l'espaceur peut aussi être fabriqué avec une seule unité absorbante s'étendant continument sur toute la longueur ou sensiblement toute la longueur de l'espaceur, et au moins une portion de ladite unité absorbante peut être supprimée préalablement à l'étape de pliage, de façon à former la ou les zones d'interruption.According to another example of implementation, the spacer can also be manufactured with a single absorbent unit extending continuously over the entire length or substantially the entire length of the spacer, and at least a portion of said absorbent unit can be removed prior to the folding step, so as to form the interrupt zone or zones.

A noter que, dans ce cas, les entailles 60 peuvent éventuellement être découpées en même temps que l'unité absorbante.Note that, in this case, the notches 60 can optionally be cut at the same time as the absorbent unit.

Claims (23)

  1. A spacer (10) for an insulating glazing unit (1) which extends in a longitudinal direction (X) and comprises first and second fixing parts (12, 14) spaced apart from each other in a lateral direction (Y) and each intended to be attached to a sheet of glass (2a, 2b) of the insulating glazing unit (1) by adhesive-bonding fixing means (5a, 5b), and at least one transverse part (20, 22) connecting said first (12) and second (14) fixing parts and defining with them an inner space (30), the spacer (10) comprising in the inner space (30) a humidity-absorbing structure (40, 140, 240) formed from at least one absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241) fixed to one of the first and second fixing parts (12, 14), the other of the first and second fixing parts (12, 14) not being in contact with the absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241), said spacer being characterized in that said absorbing structure is an element or a set of elements which is self-supporting.
  2. The spacer (10) as claimed in claim 1, in which the absorbent unit (41) is fixed by adhesive-bonding means (50), for example a hot-melt adhesive.
  3. The spacer (10) as claimed in claim 1 or 2, in which the absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241) forms a profile, in particular with a rectangular cross-section, which extends in the longitudinal direction (X).
  4. The spacer (10) as claimed in any one of claims 1 to 3, in which the absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241), measured in a plane orthogonal to the longitudinal direction (X), is between 30 and 300 mm2.
  5. The spacer (10) as claimed in any one of claims 1 to 4, in which the width (11) of the absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241), measured in the lateral direction (Y), is between 0.6 and 0.99 times the total width (1) of the spacer (10).
  6. The spacer (10) as claimed in any one of claims 1 to 5, in which the absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241) comprises a humidity-absorbing cohesive core (42, 142).
  7. The spacer (10) as claimed in claim 6, in which the cohesive core (42, 142) is formed from particles (44, 144) of at least one humidity-absorbing material, for example silica, bound by a binder (46) .
  8. The spacer (10) as claimed in claim 6 or 7, in which the cohesive core (142) is surrounded by a closed covering (170) which is permeable to water vapor, for example made from a plastic material.
  9. The spacer (10) as claimed in any one of claims 1 to 5, in which the absorbent unit (241) comprises a powdered, friable, liquid, or pasty humidity-absorbing core (242), surrounded by a closed covering (270) which is permeable to water vapor.
  10. The spacer (10) as claimed in any one of claims 1 to 9, in which the humidity-absorbing structure (40) comprises a plurality of absorbent units (41a, 41b, 41c, 41d) spaced apart in the longitudinal direction by interruption zones.
  11. The spacer (10) as claimed in any one of claims 1 to 9, in which the humidity-absorbing structure (40) comprises an absorbent unit (41; 141; 241) which extends continuously in the longitudinal direction.
  12. A method for manufacturing a spacer (10) for an insulating glazing unit (1) which extends in a longitudinal direction (X) and comprising first and second fixing parts (12, 14) which are spaced apart from each other in a lateral direction (Y) and intended to each be attached to a sheet of glass (2a, 2b) of the insulating glazing unit (1) by adhesive-bonding fixing means (5a, 5b), and at least one transverse part (20, 22) connecting said first and second fixing parts (12, 14) and defining with them an inner space (30), the method comprising the fixing of at least one absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241) forming a humidity-absorbing structure (40, 140, 240) to one of the first and second fixing parts (12, 14), the other of the first and second fixing parts (12, 14) not being in contact with said absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241), said absorbing structure being an element or a set of elements which is self-supporting.
  13. The method as claimed in claim 12, in which the absorbent unit (41, 241) is pre-extruded and then fixed onto the first or second fixing part (12, 14).
  14. The method as claimed in claim 13, in which the pre-extruded absorbent unit (141) is surrounded by a closed covering which is permeable to water vapor before being fixed to the first or second fixing part.
  15. The method as claimed in any one of claims 12 to 14, in which the absorbent unit (41, 141, 241) is fixed by adhesive bonding, for example by means of a hot-melt adhesive (50).
  16. The method as claimed in claim 12, in which the absorbent unit (41) is extruded directly onto the first or the second fixing part (12, 14).
  17. The method as claimed in any one of claims 12 to 16, in which the absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241) is fixed to the first or the second fixing part (12, 14) after the first and the second fixing parts (12, 14) have been attached to each other.
  18. The method as claimed in any one of claims 12 to 16, in which the absorbent unit (41, 41a, 41b, 41c, 41d; 141; 241) is fixed to the first or the second fixing part (12, 14) before the first and the second fixing parts (12, 14) have been attached to each other.
  19. A method for manufacturing a spacer frame (3) for an insulating glazing unit comprising at least one spacer (10) as claimed in any one of claims 1 to 11.
  20. The method as claimed in claim 19, in which the spacer (10) is bent in order to form at least two adjacent sides of the frame.
  21. The method as claimed in claim 20, in which the spacer (10) has at least two absorbent units (41a, 41b, 41c, 41d) separated in the longitudinal direction (X) by an interruption zone, and the spacer (10) is bent at said at least one interruption zone.
  22. The method as claimed in claim 20, in which the humidity-absorbing structure (40) comprises an absorbent unit (41) which extends continuously in the longitudinal direction of the spacer, at least one portion of said absorbent unit is removed prior to the bending stage so as to form an interruption zone, and the spacer (10) is bent at said at least one interruption zone.
  23. The method as claimed in claim 19, in which at least two rectilinear spacers (10) are assembled by mechanical assembly means, for example a connector (11) inserted at a respective end of each spacer so as to form two adjacent sides of the frame.
EP18822385.3A 2017-12-22 2018-12-21 Spacer with moisture-absorbing structure, and corresponding manufacturing method Active EP3728777B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1762910A FR3075853B1 (en) 2017-12-22 2017-12-22 SPACER WITH MOISTURE ABSORBENT STRUCTURE AND MANUFACTURING METHOD THEREOF
EP18194244 2018-09-13
PCT/EP2018/086459 WO2019122278A1 (en) 2017-12-22 2018-12-21 Spacer with moisture-absorbing structure, and corresponding manufacturing method

Publications (2)

Publication Number Publication Date
EP3728777A1 EP3728777A1 (en) 2020-10-28
EP3728777B1 true EP3728777B1 (en) 2022-07-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18822385.3A Active EP3728777B1 (en) 2017-12-22 2018-12-21 Spacer with moisture-absorbing structure, and corresponding manufacturing method

Country Status (4)

Country Link
EP (1) EP3728777B1 (en)
DK (1) DK3728777T3 (en)
PL (1) PL3728777T3 (en)
WO (1) WO2019122278A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1585823A (en) * 1977-05-25 1981-03-11 Bfg Glassgroup Soldered multiple glazing unit
US5873203A (en) * 1997-09-02 1999-02-23 Ppg Industries, Inc. Photoelectrolytically-desiccating multiple-glazed window units
US6212756B1 (en) * 1998-08-14 2001-04-10 Truseal Technologies, Inc. Dispensable non-adhesive desiccated matrix system for insulating glass units
US7827761B2 (en) * 2003-06-23 2010-11-09 Ppg Industries Ohio, Inc. Plastic spacer stock, plastic spacer frame and multi-sheet unit, and method of making same
DE102006024402B4 (en) 2006-05-24 2008-01-03 Peter Lisec Insulating glass unit with an elastoplastic spacer tape and Applizzierverfahren for the latter
US20140113098A1 (en) * 2012-10-22 2014-04-24 Guartdian IGU, LLC Spacer having a desiccant
CA2958613C (en) 2014-09-25 2019-05-07 Saint-Gobain Glass France Spacer for insulating glazing units
EP3184725A1 (en) * 2015-12-23 2017-06-28 VKR Holding A/S Spacer for a multiple glazing unit and a multiple glazing

Also Published As

Publication number Publication date
PL3728777T3 (en) 2022-08-29
EP3728777A1 (en) 2020-10-28
DK3728777T3 (en) 2022-08-22
WO2019122278A1 (en) 2019-06-27

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