WO2023030813A1 - Intercalaire pliable à froid ayant une rigidité améliorée - Google Patents

Intercalaire pliable à froid ayant une rigidité améliorée Download PDF

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Publication number
WO2023030813A1
WO2023030813A1 PCT/EP2022/071771 EP2022071771W WO2023030813A1 WO 2023030813 A1 WO2023030813 A1 WO 2023030813A1 EP 2022071771 W EP2022071771 W EP 2022071771W WO 2023030813 A1 WO2023030813 A1 WO 2023030813A1
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WO
WIPO (PCT)
Prior art keywords
wall
spacer
metallic
side wall
reinforcement element
Prior art date
Application number
PCT/EP2022/071771
Other languages
German (de)
English (en)
Inventor
Christopher MARJAN
Walter Schreiber
Nikolai BORCHMANN
Original Assignee
Saint-Gobain Glass France
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 filed Critical Saint-Gobain Glass France
Publication of WO2023030813A1 publication Critical patent/WO2023030813A1/fr

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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
    • E06B3/66314—Section members positioned at the edges of the glazing unit of tubular shape

Definitions

  • the invention relates to a spacer for insulating glass units, an insulating glass unit, a method for producing an insulating glass unit and its use.
  • Insulating glazing usually contains at least two panes made of glass or polymeric materials. The discs are separated from one another by a gas or vacuum space defined by the spacer.
  • the thermal insulation capacity of insulating glass is significantly higher than that of single glass and can be further increased and improved in triple glazing or with special coatings. For example, coatings containing silver enable reduced transmission of infrared radiation and thus reduce the cooling of a building in winter.
  • the other components of insulating glazing are also of great importance.
  • the seal and above all the spacer have a major impact on the quality of the insulating glazing.
  • the contact points between the spacer and the glass pane are very susceptible to temperature and climate fluctuations.
  • the connection between pane and spacer is created by an adhesive bond made of organic polymer, for example polyisobutylene.
  • the glass itself has a particular effect on the bonded joint.
  • the glass and the spacers have different coefficients of linear thermal expansion, which means that they expand at different rates when the temperature changes. Due to temperature changes, for example due to solar radiation, the glass expands or contracts again when it cools down.
  • the spacer does not follow these movements to the same extent.
  • This mechanical movement therefore stretches or compresses the adhesive bond, which can only compensate for these movements to a limited extent through its own elasticity.
  • the mechanical stress described can mean that the adhesive connection detaches over part or all of the surface. This detachment of the adhesive bond can then allow air moisture to penetrate inside the insulating glazing.
  • These climatic loads can lead to fogging in the area of the panes and a reduction in the insulating effect. It is thus desirable to match the linear expansion coefficients of glass and spacers as much as possible.
  • thermal insulation properties of insulating glazing are significantly influenced by the thermal conductivity in the area of the edge seal, in particular the spacer.
  • the high thermal conductivity of the metal causes a thermal bridge to form at the edge of the glass.
  • this thermal bridge leads to heat loss in the edge area of the insulating glazing and, on the other hand, to the formation of condensate on the inner pane in the area of the spacer in the event of high humidity and low outside temperatures.
  • thermally optimized, so-called "warm edge” systems are increasingly being used, in which the spacers are made of materials with lower thermal conductivity, in particular plastics.
  • polymer spacers are preferable to metal spacers.
  • polymeric spacers have several disadvantages. On the one hand, the tightness of the polymeric spacers against moisture and gas loss is not sufficient.
  • a barrier film as a diffusion barrier to the outside of the spacer (see, for example, WO2013/104507 A1 and WO2016/046081 A1).
  • the linear expansion coefficients of plastics are much larger than those of glass.
  • Glass fibers or glass beads for example, can be added to adjust the linear expansion coefficients (see, for example, EP0852280 A1).
  • Glass fibers and similar fillers also improve the longitudinal rigidity of the spacer.
  • adding glass fibers leads to brittle base bodies that cannot be bent at room temperature.
  • Spacer frames for an insulating glass unit can be made by connecting several pieces of spacer via connectors and then gluing or welding. Each connection point must be carefully sealed. It is therefore advantageous to produce a spacer frame by bending, since in this case a connection point only has to be sealed at one point. In particular, bending without additional heating is desirable for easy machinability.
  • An approach to increasing the Bendability without heating is the integration of one or more metallic strips into the polymer base body. The idea here is to enable high local deformation to form corners without exceeding the mechanical load limits.
  • the addition of metallic elements to the body also improves longitudinal rigidity. Longitudinal stiffness relates to longitudinal deflection and is important for machinability. Sufficient longitudinal rigidity prevents the plastic profiles from bending during processing and being positioned incorrectly or crookedly when they are applied to the panes of the insulating glazing.
  • spacers which are composed of metallic elements and polymeric elements, such as disclosed in EP1889995 A1, where a U-shaped metallic element forms the outer wall and a U-shaped polymeric element forms the inner wall, the two Elements overlap in the area of the side walls.
  • EP3607163 A1 A similar structure is described in EP3607163 A1, in which the U-shaped metal element is additionally bent several times in the area of the inner wall or at the transition from inner wall to side wall and/or is structured in the area of the outer wall. This serves to improve the longitudinal rigidity and thus the workability of the spacer.
  • the U-shaped metallic element leads to a deterioration in the heat-insulating properties of the spacer, since it creates a thermal bridge from the first pane to the second pane.
  • WO2012055553A1 discloses polymeric hollow profiles with separate metallic elements for reinforcement in order to prevent the formation of a thermal bridge.
  • the metallic elements are kinked or bent in the area of the inner wall or at the transition from the inner wall to the side wall in order to improve the longitudinal rigidity of the spacer.
  • the metal elements are attached to the outside of the polymeric hollow profile, particularly in the area of the outer wall, where the two metal elements are connected via a diffusion barrier, so that the spacer is sealed well against moisture.
  • a particular difficulty when applying individual metallic elements externally is the perfect sealing of the edge seal against the ingress of moisture and the long-term stable attachment to the base body.
  • the spacer according to the invention for insulating glass units comprises at least one polymeric hollow profile with a first side wall, a second side wall arranged parallel thereto, an inner wall, an outer wall and a cavity.
  • the cavity is enclosed by the side walls, the inner wall and the outer wall.
  • the polymeric hollow profile extends in the longitudinal direction X.
  • the inner wall extends in the transverse direction Y between the two side walls.
  • the inner wall is arranged essentially perpendicular to the side walls and connects the first side wall to the second side wall.
  • the side walls are the walls of the hollow profile to which the outer panes of the insulating glass unit are attached.
  • the inner wall is the wall of the hollow profile which, after installation in the finished insulating glass unit, faces the inner space between the panes.
  • the outer wall is at least partially parallel to the inner wall and connects the first side wall to the second side wall.
  • the outer wall thus comprises at least one section running parallel to the inner wall. After installation in the finished insulating glass unit, the outer wall points to the outer space between the panes.
  • the spacer further comprises two metallic reinforcement elements which are arranged within the walls of the polymeric hollow section.
  • the metallic reinforcement elements are not glued to the outside of the hollow profile, but are integrated into the walls during the manufacture of the polymer hollow profile.
  • the metallic reinforcement elements are thus enclosed and covered by the material of the polymeric hollow profile. This is particularly advantageous for the stability of the spacer.
  • the metallic reinforcement elements improve the longitudinal rigidity of the spacer.
  • the walls of the polymeric hollow profile are the inner wall, the outer wall, the first side wall and the second side wall.
  • the first reinforcement element is arranged inside the first side wall and inside the inner wall and/or inside the outer wall.
  • the second reinforcement element is arranged inside the second side wall and inside the inner wall and/or inside the outer wall.
  • the first metallic reinforcement element comprises a side wall section inside the first side wall and an inner wall section inside the inner wall and/or an outer wall section inside the outer wall.
  • the second metallic reinforcement element comprises a side wall section inside the second side wall and an inner wall section inside the inner wall and/or an outer wall section inside the outer wall.
  • the first reinforcement element and the second reinforcement element extend continuously in the longitudinal direction X along the entire spacer.
  • the first metal reinforcement member and the second metal reinforcement member are not in contact with each other, that is, they do not touch.
  • the first reinforcement element and the second reinforcement element are each made in one piece; that is, they extend without interruption from one wall of the hollow profile to the next wall of the hollow profile.
  • the metallic reinforcement elements are angled at the transitions from one wall section to the next.
  • the first metallic reinforcing member and the second metallic reinforcing member each have two end wall portions.
  • the terminal wall sections are the wall sections in which a metallic reinforcement element terminates.
  • a central wall section connects to another wall section on two sides.
  • a metallic reinforcement element has a side wall section and an inner wall section, these are both terminal wall sections, since the reinforcement elements end in these wall sections.
  • a metal reinforcing member has an inner wall portion, a side wall portion and an outer wall portion, so the inner wall portion and the outer wall portion are the terminal wall portions.
  • the first and the second metallic reinforcement element are each bent in the region of the two end wall sections with a bending angle ⁇ of 85° to 180°. This means that the reinforcement elements are each bent at the appropriate angle within the respective section. This does not mean bends at the transition from one section to the next section.
  • the bending angle measures the distance covered by the changed position of the leg of the original profile during bending. It is the angle between the originally stretched position of the leg of the unbent starting profile of the reinforcing element and its final bent position.
  • the spacer according to the invention offers the possibility of manufacturing a spacer frame by bending at room temperature due to the metallic reinforcing elements.
  • the reinforcement members prevent buckling during flexing in the corners of a spacer frame.
  • Sufficient longitudinal rigidity is obtained by introducing bends into each reinforcing element in both terminal wall sections.
  • the spacer according to the invention has improved heat-insulating properties and sufficient longitudinal rigidity at the same time.
  • the arrangement within the walls is particularly advantageous for the stability of the spacer, since there can be problems with long-term stability in the case of completely or partially external metallic reinforcement elements, particularly in the area of the outer wall. Due to the different material properties, the large temperature fluctuations in the edge seal of insulating glazing can lead to a weakening of the connection between the polymer hollow profile and the metal reinforcement elements.
  • the cavity of the spacer according to the invention results in a weight reduction compared to a solidly formed spacer and is available for accommodating other components, such as a desiccant.
  • the first side wall and the second side wall represent the sides of the spacer on which the outer panes of an insulating glass unit are installed when the spacer is installed.
  • the first side wall and the second side wall are parallel to each other.
  • the outer wall of the hollow profile is the wall opposite the inner wall, which points away from the interior of the insulating glass unit (inner space between the panes) in the direction of the outer space between the panes.
  • the outer wall preferably runs essentially perpendicular to the side walls.
  • a flat outer wall that is perpendicular to the side walls (parallel to the inner wall) throughout its course has the advantage that the sealing surface between the spacer and the side walls is maximized and a simpler shape facilitates the production process.
  • the first metallic reinforcing member includes a side wall portion, an inner wall portion, and an outer wall portion, the inner wall portion and the outer wall portion being the terminal wall portions.
  • the second metallic reinforcing member includes a side wall portion, an inner wall portion, and an outer wall portion, the inner wall portion and the outer wall portion being the terminal wall portions.
  • the reinforcement elements extend from the inner wall into the first side wall or into the second side wall and then into the outer wall.
  • the inner wall section is connected to the side wall section, which is connected to the outer wall section.
  • the metallic reinforcement elements are angled at the transitions from one wall section to the next: at the transition between the inner wall and a side wall and at the transition from a side wall to the outer wall.
  • the first metallic reinforcement element and the second metallic reinforcement element are each arranged in only one side wall and the outer wall or the inner wall. They therefore only include two wall sections. This saves material costs for the metallic reinforcement elements and, due to the reduced metal content, leads to reduced heat conduction in the area of the spacer. Thanks to the curved design in the two terminal ones wall sections, the spacer according to the invention is nevertheless sufficiently stiff to enable good workability.
  • the first and second reinforcement elements in the interior wall and in the outer wall are arranged entirely within the walls of the hollow profile. This means that the first and second reinforcement elements are not exposed at any point, but rather are completely embedded in the polymeric material of the hollow profile.
  • a diffusion barrier for example in the form of a film.
  • a uniform bonding surface is obtained on the outer wall of the spacer thanks to a single type of material.
  • the type of attachment used, such as an adhesive can thus be optimized for the connection between the diffusion barrier and the hollow profile and does not have to be additionally adapted for attachment to a metallic material.
  • a recess is arranged in the polymeric hollow profile in the first side wall and in the second side wall, so that the first and second metallic reinforcement elements are exposed there.
  • the side walls are indented in the direction of the cavity, resulting in small recesses in which a primary sealant can be arranged.
  • the adhesion of the typically used primary sealants to the metal reinforcement element is particularly good compared to the adhesion to the polymeric material of the base body. This improves the stability of the connection to the pane via the primary sealant, which leads to greater long-term stability of the edge bond of the insulating glass unit.
  • the recesses are preferably arranged in the half of the polymeric hollow profile that faces the inner space between the panes.
  • the recess is arranged in the area of the side wall which is at a distance of 0.5 h from the inner wall. This has proven to be particularly advantageous, since detachment of the seal towards the inner space between the panes can be prevented in this way.
  • the recesses preferably extend over a height a of 1 mm to 5 mm, particularly preferably over a height of 1 mm to 3 mm. This leads to relatively small sections in which the wall thickness of the polymeric hollow profile is reduced by the arrangement of recesses, so that the stability of the hollow profile is not impaired. Nevertheless, the overall connection to the pane is significantly improved by this area with improved adhesion.
  • the first and second reinforcement elements are also arranged in the side walls completely within the walls of the hollow profile.
  • a uniform flat surface for bonding with a diffusion barrier for example in the form of a foil
  • a flat surface for arranging the glass panes in the insulating glass unit This leads to improved tightness compared to spacers with reinforcement elements that are applied to the outside of a flat profile and lead there to an edge at the transition between the polymeric hollow profile and the reinforcement element.
  • a uniform bonding surface is obtained on the outside of the spacer, on which a diffusion barrier can be applied, for example in the form of a gas-tight and moisture-tight barrier film.
  • the inner wall portion of a reinforcement member is that part of a reinforcement member that is located within the inner wall.
  • the outer wall portion of a reinforcement member is that part of a reinforcement member that is the part of a reinforcement member that is located in the outer wall.
  • the sidewall portion of a reinforcement member is that part of a reinforcement member that is located in the sidewall.
  • the first metallic reinforcement element and the second metallic reinforcement element are each folded onto themselves in at least one of the terminal sections and are thereby bent at bending angles of approximately 180°. In doing so, an exposed end of the terminal wall section is folded onto itself. Both reinforcement elements are preferably each folded onto itself in two terminal sections and bent at bending angles of approximately 180°.
  • the bent leg of the reinforcing element is preferably in contact over the entire folded area with the unbent part of the reinforcing element, so that in this area the Reinforcement elements each have a thickness of about 2b, where b is the thickness of an individual reinforcement element. This folding / bending is technically easy to implement and produces a significant improvement in rigidity.
  • the folded reinforcement elements can be arranged in this way in a space-saving manner in the walls of the hollow profile.
  • the first reinforcement element is preferably folded onto itself in the respective terminal section over a length p of 1 mm to 10 mm, preferably of 2 mm to 5 mm. These lengths have resulted in a significant improvement in longitudinal stiffness.
  • first reinforcement member and the second reinforcement member are each folded onto itself in the inner wall sections. This means they have a bending angle of around 180°.
  • first reinforcement element and the second reinforcement element are folded onto themselves in the outer wall sections and each have bending radii of approximately 180°.
  • the first reinforcement element and the second reinforcement element are preferably folded onto themselves in the inner wall section and in the side wall section and/or folded onto themselves in the outer wall section.
  • the fold in the inner wall section and in the side wall section is technically easy to produce, since the starting profile for a reinforcement element is first bent at a bending angle of 180° and then bent at an angle of about 90° in the section folded onto itself, so that the corner between Inner wall and side wall are created. This double fold in the inner wall and side wall leads to a higher moment of inertia and thus to a higher rigidity of the reinforcement element.
  • the first reinforcement element is folded onto itself in the inner wall section over a length p of 1 mm to 10 mm, preferably from 2 mm to 5 mm
  • the second reinforcement element is in the inner wall section over a length p of 1 mm to 10 mm, preferably from 2 mm to 5 mm folded on itself.
  • This length is measured in the cross direction (Y) from the end of the folded area to the beginning of the folded area where the fold line is.
  • the first reinforcement element in the side wall section is folded on itself over a length p of 1 mm to 5 mm and the second reinforcement element in the side wall section is folded over on itself over a length p of 1 mm to 5 mm.
  • the length p is measured from the transition from the inner wall section to the side wall section to the end of the folded area.
  • first reinforcement element and the second reinforcement element are bent back on themselves in at least one terminal wall section, preferably in such a way that an air-filled tube is formed.
  • the terminal wall section is preferably the inner wall section and/or the outer wall section.
  • the starting profile for a reinforcement element is preferably bent back on itself at at least one end in such a way that the free end of the metal sheet meets the profile at an angle of approximately 90°. This creates an eyelet in the cross section and a tube in the profile that is filled with air. During the co-extrusion process, this tube is not filled with polymeric material, so the air-filled tube helps improve thermal insulation by reducing the thermal conductivity of the spacer.
  • first reinforcement element and the second reinforcement element are preferably bent back on themselves in at least one terminal wall section in such a way that an air-filled tube is formed by first bending the initial profile in such a way that a tube is formed and the free end is then bent somewhat parallel to the metal reinforcement element runs.
  • the parallel guidance achieves an additional stiffening effect, while the air-filled tube improves the heat-insulating properties.
  • the terminal wall section is preferably the inner wall section and/or the outer wall section.
  • first and the second reinforcement element are bent several times in the inner wall section and/or the first reinforcement element and the second reinforcement element are bent several times in the outer wall section and/or the first reinforcement element and the second reinforcement element are bent several times in the side wall section. Only the bends / folds within the individual sections are meant and not the bends at the transition from one section to the next section.
  • the first and second reinforcement elements are preferably bent at least twice in one section, particularly preferably bent exactly twice, very particularly preferably bent exactly three times, more preferably bent exactly four times. Bent here means that there is a bending angle between 85° and 180°. In this way, the longitudinal stiffness of the spacer is further increased, since the metallic reinforcement elements have increased structural rigidity thanks to the multi-bend design.
  • the first reinforcement element and the second reinforcement element have at least one cranked element in at least one wall section.
  • the cranked element designates a jump in the course of the reinforcement element.
  • the reinforcement element has an offset in the direction of the cavity or in the opposite direction. This increases the area moment of inertia of the reinforcement element, which in turn leads to greater longitudinal rigidity of the spacer.
  • the first reinforcement element and the second reinforcement element each have at least one cranked element in the side wall sections.
  • the variants described for bending the reinforcement elements can each be combined with one another.
  • the first and second reinforcement elements are symmetrical to one another with respect to the plane of symmetry S.
  • the plane of symmetry S is arranged centrally with respect to the transverse direction Y between the side walls and runs parallel to the side walls in the X and Z directions.
  • Both reinforcement elements preferably have the same structure in terms of thickness and material. This is beneficial for the stability of the spacer during processing.
  • the reinforcement elements can differ in terms of their dimensions and/or materials and/or can be arranged asymmetrically.
  • the first reinforcement element and/or the second reinforcement element in the inner wall extends in the transverse direction over a length I of 0.05 v to 0.30 v, where v is the width of the polymeric hollow profile.
  • the width v of the polymeric hollow profile is the distance between the surfaces of the side walls facing the panes of an insulating glass unit. The width v thus determines the distance between two panes of an insulating glass unit.
  • the length I designates the length over which a reinforcement element extends in the Y-direction, measured between its two ends in the inner wall. If a reinforcement element is curved or corrugated, for example, the stretched length is not determined, only the Distance between the two ends measured in the corrugated/curved form.
  • the area in which the side wall and the inner wall come together is also taken into account, so that the inner wall is taken into account over the entire width v of the hollow profile.
  • the length l is preferably between 0.07 v and 0.25 v, particularly preferably between 0.10 v and 0.20 v.
  • the length I determines the rigidity of the spacer. In the specified ranges, the deflection of the spacer is effectively reduced without increasing the heat conduction through the spacer too much.
  • the second metal reinforcement element is arranged in the inner wall in the transverse direction (Y) at a distance i of at least 3 mm from the first metal reinforcement element. This results in a metal-free area in the inner wall, which contributes to improving the heat-insulating properties of the spacer.
  • the second metal reinforcement element is arranged in the outer wall in the transverse direction (Y) at a distance f of at least 3 mm from the first metal reinforcement element. This results in a metal-free area in the outer wall, which contributes to improving the heat-insulating properties of the spacer.
  • the sections of the outer wall closest to the side walls are inclined at an angle ⁇ (alpha) of 30° to 60° to the outer wall in the direction of the side walls.
  • ⁇ (alpha) is inclined at an angle ⁇ (alpha) of 45°. In this case, the stability of the spacer is further improved.
  • the base material of the polymeric hollow profile contains fillers.
  • the fillers can be used to adjust material properties such as mechanical strength, stiffness and dimensional stability.
  • material properties such as mechanical strength, stiffness and dimensional stability.
  • fibrous, powdery or platelet-like reinforcing agents include, for example, mica, chalk and talc.
  • Reinforcement fibers, including glass fibers, aramid fibers, ceramic fibers, carbon fibers or natural fibers, are particularly preferred with regard to mechanical properties are attributable to. Alternatives to this are ground glass fibers, solid glass balls or hollow glass balls.
  • hollow glass spheres have a diameter of 10 ⁇ m to 20 ⁇ m and improve the stability of the polymeric hollow profile. Suitable hollow glass spheres are commercially available under the name “3MTM Glass Bubbles”.
  • the polymeric hollow profile contains both glass fibers and hollow glass spheres. Adding hollow glass spheres leads to a further improvement in the thermal properties of the hollow profile.
  • the polymeric hollow profile particularly preferably contains talc and/or hollow glass spheres as fillers.
  • the polymeric hollow profile preferably contains up to 15 percent by volume of hollow glass spheres.
  • the polymeric hollow profile preferably contains up to 20 percent by weight of talc.
  • the polymeric hollow profile has an essentially uniform wall thickness d. This leads to an improvement in the bendability compared to hollow profiles with areas of different wall thicknesses. It has been shown that with a uniform wall thickness, fewer fractures of the spacer occur during cold bending than with different wall thicknesses.
  • the wall thickness preferably changes only in those areas of the side walls that may be present, in which a recess is arranged.
  • the wall thickness d is from 0.5 mm to 1.5 mm. In this area, the spacer is stable and at the same time flexible enough to be cold bendable.
  • the wall thickness d is particularly preferably from 0.6 mm to 1.2 mm, particularly preferably from 0.8 mm to 1.0 mm. The best results are achieved with these wall thicknesses. Deviations of 0.1 mm above and below are possible due to the manufacturing process.
  • the metallic reinforcing elements contain or consist of aluminum, stainless steel or steel. These materials are easy to process and bend and deliver particularly good results when adjusting the coefficient of linear expansion.
  • the reinforcement elements are particularly preferably made of steel, preferably of coated steel. Compared to aluminium, steel has lower thermal conductivity and good linear expansion. In addition, steel is very stable and cheaper than stainless steel. Both reinforcement elements are preferably made of the same material.
  • the metal reinforcement elements are introduced in the form of a metal foil or a metal sheet in the form of a strip steel.
  • a metal foil or a metal sheet in the form of a strip steel.
  • the foils or sheets can be bent to suit and fed into the extrusion process. It is preferably continuous, solid metallic foils or sheets. Perforated foils, perforated sheets, nets or grids, on the other hand, are more difficult to roll form, but have the advantage that less material is required for production.
  • the thickness b of the first and second metallic reinforcement elements is between 0.05 mm and 0.40 mm, preferably between 0.10 mm and 0.30 mm. In this area, a good stiffening of the polymeric hollow profile is achieved by the reinforcing elements and at the same time the thermal conductivity in the edge area of the later insulating glass unit is increased only to a small extent. A thickness of 0.10 mm has proven particularly advantageous.
  • the metallic reinforcing elements are arranged approximately centrally in the inner wall in relation to the thickness d of the wall. This can be achieved particularly well during the extrusion of the hollow profile and leads to very stable spacers.
  • the metallic reinforcement elements in the inner wall are arranged closer to the outer side of the inner wall than to the side facing the cavity. This improves the properties when bending the hollow profile and at the same time increases the rigidity of the spacer profile. Reducing the distance to the outer side by just 0.1 mm leads to a measurable improvement in rigidity.
  • the minimum distance of a metallic reinforcement element is preferably 0.15 mm from the outer side of the inner wall. This ensures that the reinforcement element is arranged completely within the hollow profile and is not visible in the insulating glass unit.
  • the metallic reinforcement elements in the side walls and/or the outer wall are arranged approximately centrally with respect to the thickness of the respective side wall or outer wall. This can be implemented particularly well in production and leads to very stable spacers.
  • the polymeric hollow profile is co-extruded with the first reinforcement element and the second reinforcement element. This leads to a particularly stable spacer compared to spacers glued together.
  • the hollow profile contains polyethylene (PE), polycarbonate (PC), polypropylene (PP), polyethylene terephthalate (PET), polyethylene terephthalate glycol (PET-G), crosslinked polyethylene terephthalate (PET-X), polyoxymethylene (POM ), polyamides, polybutylene terephthalate (PBT), PET/PC, PBT/PC and/or copolymers thereof.
  • the hollow profile essentially consists of one of the listed polymers. These materials provide particularly good results in terms of the necessary flexibility that is required for the spacer to be bendable without additional heating.
  • the polymeric hollow profile consists of a foamed polymer.
  • the inclusion of air-filled pores in the hollow profile reduces the thermal conductivity and thus improves the heat-insulating properties of the hollow profile.
  • foaming agents in the production of spacers is described, for example, in EP 2930296 A1.
  • the inner wall has at least one perforation.
  • Several perforations are preferably made in the inner wall. The total number of perforations depends on the size of the insulating glass unit.
  • the perforations in the inner wall connect the cavity with the inner space between the panes, enabling gas exchange between them. This allows the moisture in the air to be absorbed by a desiccant in the cavity, thus preventing the windows from fogging up.
  • the perforations are preferably designed as slits, particularly preferably as slits with a width of 0.2 mm and a length of 2 mm.
  • the slots ensure optimal air exchange without desiccant penetrating from the cavity into the inner space between the panes.
  • the perforations can simply be punched or drilled into the inner wall. Preferably the perforations are hot punched in the inner wall.
  • the material of the inner wall is porous or made of a plastic that is open to diffusion, so that no perforations are required.
  • a diffusion barrier is applied to the first side wall, the outer wall and the second side wall of the polymeric hollow body.
  • the diffusion barrier seals the inner space between the panes against the ingress of moisture and prevents the loss of a gas contained in the inner space between the panes.
  • the diffusion barrier is applied in such a way that the areas of the two side walls adjoining the inner wall are free of a diffusion barrier.
  • a particularly good sealing of the spacer is achieved by attaching it to the entire outer wall up to the side walls.
  • the advantage of the areas on the side walls that remain free of diffusion barriers is, on the one hand, an improvement in the visual appearance when installed. In the case of a barrier that borders on the inner wall or is even part of the inner wall, this becomes visible in the finished insulating glass unit. This should be avoided for aesthetic reasons.
  • Another advantage of the exposed areas on the sidewalls is that when installed in the finished IG unit, the primary sealant can be applied to extend over the diffusion barrier and over a length of the polymeric sidewall.
  • the height of the area remaining free from the diffusion barrier is preferably between 1 mm and 3 mm.
  • the diffusion barrier is not visible in the finished insulating glass unit and the visual impression is therefore advantageous.
  • the primary sealant can be applied in the finished insulating glazing in such a way that the primary sealant is applied to the plastic of the side walls and the diffusion barrier. In this way, interfacial diffusion at the transition from diffusion barrier to plastic is significantly reduced.
  • the diffusion barrier is preferably a barrier film and prevents moisture from penetrating into the cavity of the spacer.
  • the barrier foil can be a metal foil or polymer foil or a multilayer foil with polymeric and metallic layers or with polymeric and ceramic layers or with polymeric, metallic and ceramic layers.
  • the barrier film is preferably a gas-tight and moisture-tight barrier film.
  • gas-tight and moisture-tight refer to gas diffusion tightness and vapor diffusion tightness for the relevant gases (e.g. nitrogen, oxygen, water and argon).
  • gases e.g. nitrogen, oxygen, water and argon.
  • the materials used are impervious to gas or vapor diffusion if, preferably, no more than 1% of the gases in the space between the panes can escape within a year. Diffusion-tight is also to be equated with low-diffusion in the sense that the corresponding test standard EN 1279 parts 2 + 3 is preferably fulfilled, i.e. the finished spacer preferably fulfills the test standard EN 1279 parts 2 + 3.
  • the diffusion barrier is preferably a barrier film.
  • the barrier film is preferably a multilayer film with polymeric layers and metallic layers or with polymeric and ceramic layers or with polymeric, metallic and ceramic layers.
  • the barrier film preferably contains at least one polymeric layer and a metallic layer or a ceramic layer.
  • the layer thickness of the polymeric layers is preferably between 5 ⁇ m and 80 ⁇ m, preferably from 5 ⁇ m to 24 ⁇ m, particularly preferably from 10 ⁇ m to 15 ⁇ m. Polymer layers with these layer thicknesses can be coated and laminated well.
  • the barrier film preferably contains one, two, three, four or more polymeric layers.
  • Ceramic layers are characterized by low heat conduction, which further improves the heat-insulating properties of the spacer.
  • the ceramic layers preferably contain or consist of a silicon oxide and/or a silicon nitride.
  • the barrier film preferably comprises at least one thin ceramic layer with a thickness between 10 nm and 300 nm, particularly preferably from 20 nm to 200 nm. These layer thicknesses lead to a particularly good barrier effect. To improve the barrier effect and to avoid a loss of tightness when the spacer is bent, the ceramic layers are preferably used in combination with other ceramic and/or metallic layers.
  • Metallic layers are characterized by excellent barrier properties against moisture penetration and sealing against gas leakage.
  • a metallic layer can comprise both pure metals and their oxides and their alloys.
  • the metallic layers preferably comprise or consist of aluminum, silver, copper, gold or alloys or oxides thereof. These are characterized by a particularly high level of tightness.
  • the barrier film preferably comprises at least one thin metallic layer with a thickness of between 10 nm and 300 nm. These thin metallic layers do little to increase the thermal conductivity of the barrier film, but are more susceptible to leaks that can occur during bending. Therefore, thin metallic layers are preferably used in combination with other metallic layers and/or ceramic layers.
  • the barrier film preferably comprises at least one, preferably exactly one, thick metallic layer with a thickness between 2 ⁇ m and 8 ⁇ m, particularly preferably between 4 ⁇ m and 7 ⁇ m. It has been shown that thick metallic layers do not lose their tightness when bent. Thus fewer individual layers are necessary than with a structure with many thin metal layers, which is easier to manufacture. Most preferably, the barrier film comprises a thick metallic layer of elemental aluminum. Aluminum has proven to be particularly suitable in bending tests.
  • the barrier film preferably comprises precisely one thick metallic layer, at least one polymeric layer and at least one thin ceramic layer and/or at least one thin metallic layer.
  • the layer sequence is preferred: polymeric layer—thin metallic layer or thin ceramic layer—thick metallic layer. This construction has proven to be extremely ductile, which is of great importance at the corners of a cold bent spacer frame.
  • the barrier film preferably contains at least two thin metallic layers and/or at least two thin ceramic layers, which are arranged alternately with at least one polymeric layer.
  • the outer layers are preferably formed by the polymeric layer. In this way, the thin metallic and ceramic layers are particularly well protected against mechanical damage.
  • the outer layers are preferably formed by metallic or ceramic layers. These improve the adhesion properties to the secondary sealant.
  • barrier film with an alternating sequence of layers is particularly advantageous with regard to the tightness of the system.
  • a defect in one of the layers does not lead to a loss of function of the barrier film. In comparison, even a small defect in a single layer can lead to complete failure.
  • the application of several thin layers is advantageous compared to one thick layer, since the risk of internal adhesion problems increases with increasing layer thickness.
  • thicker layers have a higher conductivity, so that such a film is thermodynamically less suitable.
  • the thin metallic and ceramic layers are preferably deposited using a PVD process (physical vapor deposition). Coating processes for films with thin layers in the nanometer range are known and are used, for example, in the packaging industry.
  • a metallic thin layer can be applied to a polymeric foil, for example by sputtering, in the required thickness between 10 nm and 300 nm. Subsequently, this coated foil can be laminated with a thick metallic layer in a thickness in the ⁇ m range and the barrier foil can thus be obtained. Such a coating can be done on one side or on both sides.
  • the polymeric layers of the barrier film preferably comprise polyethylene terephthalate, ethylene vinyl alcohol, polyvinylidene chloride, polyamides, polyethylene, polypropylene, silicones, acrylonitriles, polyacrylates, polymethyl acrylates and/or copolymers or mixtures thereof.
  • the barrier film contains an adhesion promoter layer, which serves to improve the adhesion of the secondary sealant in the finished insulating glazing.
  • This adhesion promoter layer is arranged as the outermost layer of the barrier film so that it is in contact with the finished insulating glazing the secondary sealant.
  • a chemical pretreatment, a ceramic adhesion layer or a metallic adhesion layer can be used as the adhesion promoter layer.
  • the metallic adhesion layer preferably has a thickness of between 5 nm and 30 nm.
  • a metallic adhesion layer can comprise both pure metals and their oxides and their alloys.
  • the metallic bonding layer preferably comprises or consists of aluminum, titanium, nickel, chromium, iron or alloys or oxides thereof. These have good adhesion to the adjacent sealant.
  • Preferred alloys are stainless steel and TiNiCr.
  • the hollow profile preferably has a width v of 5 mm to 55 mm, preferably 10 mm to 20 mm, along the inner wall.
  • the width v is the dimension extending between the side walls.
  • the width is the distance between the opposite surfaces of the two side walls.
  • the choice of the width of the inner wall determines the distance between the panes of the insulating glass unit.
  • the exact dimensions of the inner wall depend on the dimensions of the insulating glass unit and the desired size of the space between the panes.
  • the hollow profile preferably has a height of 5 mm to 15 mm, particularly preferably 5 mm to 10 mm, along the side walls.
  • the spacer has an advantageous stability, but on the other hand it is advantageously inconspicuous in the insulating glass unit.
  • the cavity of the spacer is of an advantageous size for accommodating a suitable amount of desiccant.
  • the height of the spacer is the distance between the opposite surfaces of the outer wall and the inner wall.
  • a desiccant is preferably contained in the hollow space, preferably silica gels, molecular sieves, CaCh, Na2SC>4, activated carbon, silicates, bentonites, zeolites and/or mixtures thereof.
  • the invention also includes an insulating glass unit with at least a first pane, a second pane, a circumferential spacer according to the invention arranged between the first and second panes, an inner space between the panes and an outer space between the panes.
  • the spacer according to the invention is arranged to form a circumferential spacer frame.
  • the first disk is on the first side wall of the spacer attached via a primary sealant
  • the second disc is attached to the second sidewall via a primary sealant. That is, a primary sealant is disposed between the first side wall and the first pane and between the second side wall and the second pane.
  • the primary sealant is in contact with the outer wall of the spacer or with a diffusion barrier arranged there.
  • the first pane and the second pane are arranged in parallel and preferably congruently.
  • the edges of the two panes are therefore arranged flush in the edge area, i.e. they are at the same height.
  • the inner space between the panes is delimited by the first and second panes and the inner wall.
  • the outer pane gap is defined as the space bounded by the first pane, the second pane and the outer wall of the spacer.
  • the outer space between the panes is at least partially sealed with a secondary sealant.
  • the secondary sealant contributes to the mechanical stability of the insulating glass unit and absorbs part of the climatic loads that affect the edge seal.
  • the primary sealing means extends to the areas of the first and second side wall adjoining the inner wall, which are preferably free of the diffusion barrier.
  • the primary sealant thus covers the transition between the polymeric hollow profile and the diffusion barrier, so that a particularly good seal of the insulating glass unit is achieved. In this way, the diffusion of moisture into the cavity of the spacer at the point where the diffusion barrier meets the plastic is reduced (less interfacial diffusion).
  • a recess is arranged in the polymeric hollow profile in the first side wall and in the second side wall, in which recess the primary sealant is arranged.
  • the side walls are offset in the direction of the cavity and the primary sealant touches the first and second metal reinforcement elements which are exposed there. Since the adhesion of the sealants commonly used to metallic materials is particularly high, the stability of the connection between pane and spacer is improved.
  • the primary sealant preferably contains a polyisobutylene.
  • the polyisobutylene can be crosslinking or non-crosslinking polyisobutylene.
  • the sealant is preferably introduced into the gap between the spacer and panes in a thickness of 0.1 mm to 0.8 mm, particularly preferably in a thickness of 0.2 mm to 0.4 mm.
  • the secondary sealant is applied such that the entire outer space between the panes is completely filled with secondary sealant. This leads to maximum stabilization of the insulating glass unit.
  • the secondary sealant preferably contains polymers or silane-modified polymers, particularly preferably organic polysulfides, silicones, room-temperature-vulcanizing (RTV) silicone rubber, peroxide-vulcanized silicone rubber and/or addition-vulcanized silicone rubber, polyurethanes and/or hotmelt. These sealants have a particularly good stabilizing effect.
  • polymers or silane-modified polymers particularly preferably organic polysulfides, silicones, room-temperature-vulcanizing (RTV) silicone rubber, peroxide-vulcanized silicone rubber and/or addition-vulcanized silicone rubber, polyurethanes and/or hotmelt.
  • the first pane and the second pane of the insulating glass unit preferably contain glass, ceramic and/or polymers, particularly preferably quartz glass, borosilicate glass, soda-lime glass, polymethyl methacrylate or polycarbonate.
  • the first pane and the second pane have a thickness of 2 mm to 50 mm, preferably 3 mm to 16 mm, it also being possible for the two panes to have different thicknesses.
  • the insulating glass unit comprises at least three panes, with a further spacer frame being attached to the first pane and/or the second pane, to which the at least third pane is attached.
  • the most diverse geometries of the insulating glass unit are possible, for example rectangular, trapezoidal and rounded shapes.
  • the spacer can be bent to produce round geometries.
  • the first pane, the second pane and other panes can be made of toughened safety glass, thermally or chemically toughened glass float glass, extra-clear low-iron float glass, colored glass, or laminated safety glass containing one or more of these components.
  • the panes can have any other components or coatings, for example low-E layers or other sun protection coatings.
  • the spacer frame consists of one or more spacers according to the invention.
  • a spacer according to the invention is preferably bent to form a complete frame and connected or welded at one point via a plug connector. It can also be a matter of several spacers according to the invention, which are linked to one another via one or more plug connectors.
  • the connectors can be designed as longitudinal connectors or corner connectors. Such corner connectors can be designed, for example, as a plastic molded part with a seal, in which two spacers provided with a miter cut collide.
  • the insulating glazing comprises more than two panes.
  • the spacer can contain grooves, for example, in which at least one further disk is arranged.
  • Several panes could also be designed as a laminated glass pane.
  • the invention also includes a method for producing an insulating glass unit according to the invention, comprising the steps:
  • the insulating glass unit is manufactured mechanically on double glazing systems known to those skilled in the art.
  • a spacer frame comprising the provided spacer according to the invention.
  • the spacer frame is preferably produced by bending the spacer according to the invention into a frame which is closed at one point by welding, gluing and/or using a plug connector.
  • a first pane and a second pane are provided and the spacer frame is fixed via a primary sealant between the first and second panes.
  • the spacer frame is placed on the first pane with the first side wall of the spacer and fixed using the primary sealant.
  • the second pane is then placed congruently with the first pane on the second side wall of the spacer and also fixed using the primary sealant and the pane arrangement is pressed.
  • the outer space between the panes is at least partially filled with a secondary sealant.
  • the method according to the invention thus makes it possible to produce an insulating glass unit in a simple and cost-effective manner. No special new machines are required since, thanks to the structure of the spacer according to the invention, conventional bending machines can be used, such as are already available for metal cold-bendable spacers.
  • the spacer is bent at room temperature, ie at temperatures below 40°C, preferably at 15°C to 30°C. This means that no external heat source is required to preheat the spacer in the corners. This procedure saves energy and time.
  • the invention also includes the use of the insulating glass unit according to the invention as building interior glazing, building exterior glazing and/or facade glazing.
  • FIG. 2 shows a cross section of a further possible embodiment of a spacer according to the invention
  • FIG. 3 shows a cross section of a further possible embodiment of a spacer according to the invention
  • FIG. 4 shows a cross section of a further possible embodiment of a spacer according to the invention
  • FIG. 5 shows a cross section of a further possible embodiment of a spacer according to the invention
  • FIG. 6 shows a cross section of a further possible embodiment of a spacer according to the invention
  • FIG. 7 shows a cross section of a further possible embodiment of a spacer according to the invention.
  • FIG. 8 shows a cross section of a further possible embodiment of a spacer according to the invention.
  • FIG. 9 shows a cross section of a possible embodiment of the insulating glass unit according to the invention.
  • Figure 10 shows a cross section of a possible embodiment of a diffusion barrier
  • FIG. 11 shows a cross section of a further possible embodiment of a diffusion barrier.
  • FIG. 1 shows a cross section through a spacer I according to the invention.
  • the spacer comprises a polymeric hollow profile 1 which extends in the longitudinal direction X.
  • the hollow profile consists, for example, of polypropylene with 10% by weight of talc and 5% by volume of hollow glass spheres.
  • the hollow profile 1 comprises a first side wall 2.1, a side wall 2.2 running parallel thereto, an inner wall 3 and an outer wall 4.
  • the inner wall 3 extends in the transverse direction Y and runs perpendicular to the side walls 2.1 and 2.2 and connects the two side walls.
  • the outer wall 4 is opposite the inner wall 3 and connects the two side walls 2.1 and 2.2.
  • the outer wall runs partially parallel to the inner wall 3.
  • the sections 4.1 of the outer wall 4 closest to the side walls 2.1 and 2.2 are inclined at an angle a (alpha) of about 45° to the outer wall 4 in the direction of the side walls 2.1 and 2.2. Between these inclined sections 4.1 there is a parallel one Section 4.2, which runs parallel to the inner wall 3.
  • the angled geometry of the inclined sections 4.1 improves the stability of the polymeric hollow profile 1. In addition, this enables a more stable arrangement of the first and second reinforcement elements 6.1 and 6.2, since they are also arranged at an angle there. Furthermore, the bonding with a possible diffusion barrier 12 in the form of a barrier film is improved.
  • the wall thickness d of the hollow profile is 0.8 mm. The wall thickness d is essentially the same everywhere.
  • the polymeric hollow profile 1 has, for example, a height h of 6.5 mm and a width v of 16 mm (v and h shown as an example in FIG. 2).
  • the outer wall 4, the inner wall 3 and the two side walls 2.1 and 2.2 enclose the cavity 5.
  • the cavity 5 can accommodate a desiccant 11.
  • perforations 24 not shown in this figure
  • the desiccant 11 can then absorb moisture from the inner space 15 between the panes via the perforations 24 in the inner wall 3 (see FIG. 9).
  • the spacer I also includes two metallic reinforcement elements 6.1, 6.2, which are arranged within the walls 3, 2.1, 4, 2.2 of the polymeric hollow profile.
  • the first metallic reinforcing element 6.1 comprises a side wall section 6.1s inside the first side wall 2.1, an inner wall section 6.1c inside the inner wall 3 and an outer wall section 6.1o inside the outer wall 4.
  • the second metallic reinforcing element 6.2 correspondingly comprises a side wall section 6.2s inside the second side wall 2.2 , an inner wall section 6.2c inside the inner wall 3 and an outer wall section 6.2o inside the outer wall 4.
  • the inner wall sections 6.1c and 6.2c and the outer wall sections 6.1o and 6.2o are the terminal wall sections.
  • the first reinforcement element and the second reinforcement element extend continuously in the longitudinal direction X along the entire spacer.
  • the reinforcing elements 6.1 and 6.2 are located approximately centrally in the walls of the hollow profile in relation to the wall thickness.
  • the reinforcement elements 6.1, 6.2 primarily contribute to the longitudinal rigidity and flexibility of the spacer.
  • the first and second metallic reinforcing elements 6.1 and 6.2 have the same structure and the same dimensions.
  • the first metal reinforcement member and the second metal reinforcement member are not in contact with each other, that is, they do not touch.
  • a region of length f is free of metal reinforcement elements.
  • the first metallic reinforcing element 6.1 extends into the inner wall 3 over a length I of approximately 1.8 mm, as a result of which a deflection of the spacer profile is effectively reduced.
  • the first reinforcement element is bent at an angle of approximately 90° at the connection point to the first side wall 2.1 and then runs over the entire height of the side wall 2.1 approximately in the middle of the side wall.
  • the first reinforcement element 6.1 is angled and runs in the entire angled section of the outer wall 4.1.
  • the first reinforcement element 6.1 is therefore designed in one piece and is angled at the transitions from one wall section to the next wall section, the angle being predetermined by the geometry of the hollow profile. Accordingly, the second metallic reinforcement element 6.2 is constructed symmetrically. This symmetrical construction is particularly advantageous for the stability of the spacer when it is bent into a spacer frame.
  • the first and the second metallic reinforcement element 6.1, 6.2 are each bent within the inner wall section 6.1c, 6.2c with a bending angle ⁇ of approximately 180°, the bending taking place in such a way that an air-filled tube is formed.
  • the free end of the reinforcement element 6.1, 6.2 stands at a 90° angle on the part of the respective reinforcement element onto which it is bent back. This creates an eyelet in the cross section and a tube in the profile that is filled with air. During the co-extrusion process, this tube is not filled with polymeric material, so the air-filled tube helps improve thermal insulation.
  • the first reinforcement element 6.1 and the second reinforcement element 6.2 are folded onto themselves and bent with a bending angle ⁇ of approximately 180°.
  • the bending angle measures the distance covered by the changed position of the leg of the original profile during bending.
  • the bent leg of the respective reinforcement element has a parallel contact with the unbent part of the reinforcement element.
  • a diffusion barrier in the form of a gas-tight and moisture-tight barrier film 12 is preferably arranged on the spacer on the outer wall 4 and part of the first side wall 2.1 and part of the first side wall 2.2 and completely covers the outer wall. Since the reinforcing elements 6.1 and 6.2 are arranged completely within the walls of the hollow profile, there is a uniform surface for bonding with a barrier film 12. The areas of the first side wall 2.1 and the second side wall 2.2 bordering on the inner wall 3 preferably remain free of barrier film 12.
  • the barrier film 12 can be attached to the hollow profile 1 with a polyurethane hot-melt adhesive, for example.
  • a barrier film 12 is shown in FIG. 9 as an example.
  • the barrier films shown in FIGS. 10 and 11, for example, are suitable as barrier film 12 .
  • FIG. 2 shows a cross section of a further spacer according to the invention.
  • a diffusion barrier is not shown here; for example, the films shown in FIGS. 9 and 10 are suitable.
  • the basic features of the spacer are as described for FIG. 1 and differ, for example, in the shape of the first and second reinforcement elements 6.1 and 6.2 in the respective inner wall sections.
  • the plane of symmetry S is drawn in as an example for all spacers shown in FIGS.
  • the plane of symmetry S is arranged centrally with respect to the transverse direction Y between the side walls and runs parallel to the side walls 2.1, 2.2 in the X and Z direction.
  • the reinforcement elements 6.1 and 6.2 are made in one piece.
  • the first reinforcement element 6.1 and the second reinforcement element 6.2 are each folded onto itself in the inner wall sections 6.1c, 6.2c. They have a bending angle ß of about 180°.
  • the bent leg of each reinforcing element is in contact with the unbent part of the reinforcing element over the entire folded area p, so that in this area the reinforcing elements each have a thickness of about 2b, where b is the thickness of an individual reinforcing element.
  • a recess 10.1, 10.2 is arranged in the polymer hollow profile 1 in the first side wall 2.1 and in the second side wall 2.2, so that the first and second metallic reinforcement elements 6.1, 6.2 are exposed.
  • the side walls are indented in the direction of the cavity 5, resulting in small recesses in which a primary sealant can be arranged. Since the adhesion of the typically used primary sealant to the metallic reinforcement element is particularly good, the stability of the connection to the pane via the primary sealant is improved.
  • the recesses 10.1, 10.2 are arranged in the half of the polymeric hollow profile that faces the inner space between the panes. In other words, based on the height h of the polymeric hollow profile, the recess is arranged in the area of the side wall which is at a distance of 0.5 h from the inner wall (this corresponds to 0.5 h above the line in the figure).
  • FIG. 3 shows a cross section of a further spacer according to the invention.
  • the spacer essentially has the same structure as shown in FIG. 1 and differs only in the design of the first and second reinforcement elements 6.1 and 6.2 in the inner wall sections 6.1c, 6.2c and in the side wall sections 6.1s, 6.2s.
  • the length I of the reinforcement elements in the inner wall is 2.5 mm each, which leads to an improvement in rigidity.
  • This fold can be produced by first bending the starting profile for a reinforcement element at a bending angle of 180° and then bending it at an angle of about 90° in the section that is folded onto itself, so that the corner between the inner wall and side wall is formed there.
  • the bent leg of the reinforcing member is in contact, resulting in a double thickness reinforcing member, resulting in increased rigidity of the spacer.
  • FIG. 4 shows a cross section of another spacer I according to the invention. The spacer differs from the spacer shown in FIG.
  • the first reinforcement element 6.1 and the second reinforcement element 6.2 are bent back onto themselves in the inner wall section in such a way that an air-filled tube is formed.
  • the starting profile is first bent in such a way that a tube is formed and the free end of the bent leg then runs parallel to the unbent part of the metallic reinforcement element.
  • the parallel guidance achieves an additional stiffening effect, while the air-filled tube improves the heat-insulating properties.
  • FIG. 5 shows a cross section of another spacer I according to the invention.
  • the spacer differs from that shown in FIG. 2 in the design of the first and second reinforcement elements 6.1, 6.2 in the side wall sections 6.1s, 6.2s.
  • the spacer also differs from that in FIG. 2 in that the side walls have no recesses 10.1, 10.2 and the reinforcing elements 6.1, 6.2 are completely embedded in the area of the side walls and are not exposed.
  • the first reinforcement element 6.1 and the second reinforcement element 6.2 have an offset element in the side wall sections. In the respective side wall section, the respective reinforcement element has an offset in the direction of the cavity.
  • the reinforcement element is bent four times by a bending angle of 90° in the region of the side wall section. This increases the area moment of inertia of the reinforcement element, which in turn leads to greater longitudinal rigidity of the spacer.
  • FIG. 6 shows a cross section of a further spacer I according to the invention.
  • the spacer differs from that shown in FIG. 5 by the different design of the reinforcing elements 6.1 and 6.2.
  • the side wall sections 6.1s, 6.2s each have an offset element.
  • the reinforcing elements 6.1, 6.2 are folded back on themselves in the inner wall sections and the side wall sections, with the folded area extending in the side wall sections up to the bent element in each case. This achieves maximum stabilization of the respective reinforcement element.
  • the reinforcement elements 6.1, 6.2 also differ from the previously shown embodiments in the design of the outer wall section.
  • the Strengthening elements are folded back on themselves but are not in direct contact in the folded areas.
  • FIG. 7 shows a cross section of a further spacer I according to the invention.
  • the spacer differs from that shown in FIG. 6 by the different design of the side walls 2.1, 2.2.
  • a recess 10.1, 10.2 is arranged here in the area of the respective side wall 2.1, 2.2 in which the double-folded area of the respective side wall section 6.1s, 6.2s is arranged.
  • a primary sealant 17 can be arranged there in the insulating glass unit.
  • Figure 8 shows a cross section of another spacer I according to the invention.
  • the spacer differs from the spacer shown in Figure 3 in that the first reinforcement element 6.1 and the second reinforcement element 6.2 each have no inner wall section, but both only have a side wall section 6.1s or 6.2s and an outer wall section 6.1o or 6.2o.
  • the two end wall sections of a reinforcement element are the respective side wall sections and the outer wall sections.
  • the first side wall section 6.1s and the second side wall section 6.2s are folded back on themselves at the respective exposed end over a length p of 1 mm. Since no metallic reinforcing element is arranged in the inner wall 3 in this case, the heat conduction in the area of the inner wall is reduced. This improves the heat insulating properties of the spacer.
  • Figure 9 shows a cross section of the edge area of an insulating glass unit II according to the invention with the spacer I shown in Figure 1.
  • the arrangement of the diffusion barrier 12 is shown here, with the primary sealant 17 being arranged over the diffusion barrier 12, so that a uniform sealing plane is created.
  • the first disc 13 is connected via a primary sealant 17 to the first side wall 2.1 of the spacer I, and the second disc 14 is attached via the primary sealant 17 to the second side wall 2.2.
  • the primary sealant 17 contains a crosslinking polyisobutylene.
  • the inner space 15 between the panes is located between the first pane 13 and the second pane 14 and is delimited by the inner wall 3 of the spacer I according to the invention.
  • the cavity 5 is filled with a desiccant 11, for example a molecular sieve.
  • the cavity 5 is connected to the inner space 15 between the panes via perforations 24 in the inner wall 3 tied together. Through the perforations 24 in the inner wall 3, a gas exchange takes place between the cavity 5 and the inner space 15 between the panes, with the desiccant 11 absorbing the humidity from the inner space 15 between the panes.
  • the first pane 13 and the second pane 14 protrude beyond the side walls 2.1 and 2.2, so that an outer pane gap 16 is created, which is located between the first pane 13 and the second pane 14 and is delimited by the outer wall 4 with the diffusion barrier 12 of the spacer.
  • the edge 21 of the first disc 13 and the edge 22 of the second disc 14 are arranged at the same height.
  • the outer space 16 between the panes is filled with a secondary sealant 18 .
  • the secondary sealant 18 is a silicone, for example. Silicones absorb the forces acting on the edge seal particularly well and thus contribute to the high stability of the insulating glass unit II.
  • the first pane 13 and the second pane 14 consist of soda-lime glass with a thickness of 3 mm.
  • FIG. 10 shows a cross section of a diffusion barrier 12 suitable for a spacer according to the invention.
  • the diffusion barrier 12 is a multi-layer barrier film comprising a polymeric layer 25 of 12 ⁇ m thick polyethylene terephthalate (PET), adjoining a thin metallic layer 26 in the form of a sputtered 300 nm thick aluminum layer.
  • the barrier foil also includes a thick metallic layer 27 of 4 ⁇ m thick elemental aluminum.
  • the thin metallic layer 26 of sputtered aluminum is bonded to the elemental aluminum layer by an adhesive layer.
  • the two film components can be connected by lining or laminating.
  • the thick aluminum layer 27 ensures excellent tightness even after bending. This means that the seal of the spacer is still very good even in the corners where the foil is stretched considerably.
  • the thin aluminum layer 26 further improves the tightness of the spacer.
  • FIG. 11 shows a cross section of a further diffusion barrier 12 suitable for a spacer according to the invention.
  • the diffusion barrier 12 has a total of four thin metallic layers 26 with a thickness of 50 nm each and two polymer layers 25 with a thickness of 12 ⁇ m each.
  • the diffusion barrier 12 consists of two double-sided sputtered PET films, which are connected to one another via a thin 2 ⁇ m thick adhesive layer (not shown).
  • the PET layers 25 are arranged alternately with two thin metallic layers 26 each.
  • the use of a barrier film with an alternating sequence of layers is particularly advantageous with regard to the tightness of the system. A defect in one of the layers does not lead to a loss of function of the barrier film.
  • the outer layers are each thin metallic layers. These improve the adhesion properties to the secondary sealant.
  • the use of several thin layers also has the advantage that the heat conduction through the metallic layers increases very little. Thus, the heat insulating properties of the spacer are further improved.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Refrigerator Housings (AREA)
  • Wing Frames And Configurations (AREA)

Abstract

L'invention concerne un intercalaire (I) permettant d'isoler des unités de verre, comprenant au moins - un profilé creux en polymère (1) s'étendant dans la direction longitudinale (X), ledit profilé creux comportant - une première paroi latérale (2.1) et une seconde paroi latérale (2.2) disposée en parallèle avec celle-ci, - une paroi interne (3) qui s'étend dans la direction transversale (Y) entre les parois latérales (2.1, 2.2) et interconnecte les parois latérales ; - une paroi externe (4) qui est disposée au moins partiellement en parallèle avec la paroi interne (3) et perpendiculairement aux parois latérales (2.1, 2.2) et interconnecte les parois latérales (2.1, 2.2) ; - une cavité (5) qui est entourée par les parois latérales (2.1, 2.2), la paroi interne (3) et la paroi externe (4), - un premier élément de renforcement métallique (6.1) comprenant une partie paroi latérale (6.1s) à l'intérieur de la première paroi latérale (2.1) et une partie paroi interne (6.1c) à l'intérieur de la paroi interne (3) et/ou une partie paroi externe (6.1o) à l'intérieur de la paroi externe (4) et - un second élément de renforcement métallique (6.2) comprenant une partie paroi latérale (6.2s) à l'intérieur de la seconde paroi latérale (2.2), une partie paroi interne (6.2c) à l'intérieur de la paroi interne (3) et/ou une partie paroi externe (6.2o) à l'intérieur de la paroi externe (4) : - le premier élément de renforcement métallique et le second élément de renforcement métallique (6.1, 6.2) n'étant pas en contact l'un avec l'autre et étant conçus d'une seule pièce, - le premier élément de renforcement métallique (6.1) et le second élément de renforcement métallique (6.2) ayant chacun deux parties paroi de face d'extrémité et étant pliés à un angle de pliage compris entre 85° et 180° dans la région des deux parties paroi de face d'extrémité.
PCT/EP2022/071771 2021-08-31 2022-08-03 Intercalaire pliable à froid ayant une rigidité améliorée WO2023030813A1 (fr)

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EP0852280A1 (fr) 1996-12-20 1998-07-08 Saint-Gobain Vitrage Suisse AG Entretoise pour vitrage multiple
EP1889995A1 (fr) 2006-08-11 2008-02-20 Roll Tech A/S Pièce d ecartement pour des vitrages et un procédé de fabrication une telle pièce d ecartement
DE102010049806A1 (de) * 2010-10-27 2012-05-03 Technoform Glass Insulation Holding Gmbh Abstandshalterprofil und Isolierscheibeneinheit mit einem solchen Abstandshalterprofil
WO2013104507A1 (fr) 2012-01-13 2013-07-18 Saint-Gobain Glass France Espaceur pour vitrages isolants
EP2930296A1 (fr) 2014-04-10 2015-10-14 Thermoseal Group Limited Barre d'espacement de vitrage
WO2016046081A1 (fr) 2014-09-25 2016-03-31 Saint-Gobain Glass France Entretoise pour vitrages isolants
WO2016150705A1 (fr) * 2015-03-20 2016-09-29 Saint-Gobain Glass France Intercalaire pour vitrage isolant à étanchéité accrue
CN105672833B (zh) * 2016-03-17 2018-03-27 大连华工创新科技股份有限公司 中空玻璃隔热条及制造设备
WO2018185281A1 (fr) * 2017-04-07 2018-10-11 Rolltech A/S Profilé d'entretoise à rigidité améliorée

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0852280A1 (fr) 1996-12-20 1998-07-08 Saint-Gobain Vitrage Suisse AG Entretoise pour vitrage multiple
EP1889995A1 (fr) 2006-08-11 2008-02-20 Roll Tech A/S Pièce d ecartement pour des vitrages et un procédé de fabrication une telle pièce d ecartement
DE102010049806A1 (de) * 2010-10-27 2012-05-03 Technoform Glass Insulation Holding Gmbh Abstandshalterprofil und Isolierscheibeneinheit mit einem solchen Abstandshalterprofil
WO2012055553A1 (fr) 2010-10-27 2012-05-03 Technoform Glass Insulation Holding Gmbh Profilé d'espacement et vitrage isolant présentant un tel profilé d'espacement
WO2013104507A1 (fr) 2012-01-13 2013-07-18 Saint-Gobain Glass France Espaceur pour vitrages isolants
EP2930296A1 (fr) 2014-04-10 2015-10-14 Thermoseal Group Limited Barre d'espacement de vitrage
WO2016046081A1 (fr) 2014-09-25 2016-03-31 Saint-Gobain Glass France Entretoise pour vitrages isolants
WO2016150705A1 (fr) * 2015-03-20 2016-09-29 Saint-Gobain Glass France Intercalaire pour vitrage isolant à étanchéité accrue
CN105672833B (zh) * 2016-03-17 2018-03-27 大连华工创新科技股份有限公司 中空玻璃隔热条及制造设备
WO2018185281A1 (fr) * 2017-04-07 2018-10-11 Rolltech A/S Profilé d'entretoise à rigidité améliorée
EP3607163A1 (fr) 2017-04-07 2020-02-12 Rolltech A/S Profilé d'entretoise à rigidité améliorée

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