EP3008270A1

EP3008270A1 - Spacer for triple insulated glazing

Info

Publication number: EP3008270A1
Application number: EP14709290.2A
Authority: EP
Inventors: Hans-Werner Kuster; Marc Maurer; Walter Schreiber
Original assignee: Saint Gobain Glass France SAS; Compagnie de Saint Gobain SA
Current assignee: Saint Gobain Glass France SAS
Priority date: 2013-06-14
Filing date: 2014-03-11
Publication date: 2016-04-20
Also published as: CN105308252A; KR20160007593A; JP6234560B2; CN105308252B; JP2016526622A; US20160138326A1; US9739085B2; KR101885418B1; WO2014198431A1

Abstract

The invention relates to a spacer (I) for insulated glazing, at least comprising a polymeric main body (1) having a wall thickness d and comprising a first pane contact surface (2.1) and a second pane contact surface (2.2) running parallel thereto, a first glazing interior surface (3.1) and a second glazing interior surface (3.2), an outer surface (4), a first hollow chamber (5.1) and a second hollow chamber (5.2), wherein: - a groove (6) for receiving a pane runs parallel to the first pane contact surface (2.1) and the second pane contact surface (2.2) between the first glazing interior surface (3.1) and the second glazing interior surface (3.2); - the first hollow chamber (5.1) adjoins the first glazing interior surface (3.1), and the second hollow chamber (5.2) adjoins the second glazing interior surface (3.2); - the lateral flanks (7) of the groove (6) are formed by the walls of the first hollow chamber (5.1) and the second hollow chamber (5.2); and - the wall thickness d' in the region of the lateral flanks (7) is less than the wall thickness d of the polymeric main body (1).

Description

Spacers for triple insulating glazings

The invention relates to a spacer for triple insulating glazings, a triple insulating glazing, a process for their preparation and their use.

The thermal conductivity of glass is about a factor of 2 to 3 lower than that of concrete or similar building materials. However, since slices are in most cases much thinner than comparable elements made of stone or concrete, buildings often lose the largest proportion of heat through the exterior glazing. This effect is particularly evident in skyscrapers with partial or complete glass facades. The additional costs for heating and air conditioning systems make a not inconsiderable part of the maintenance costs of a building. In addition, lower carbon dioxide emissions are required as part of stricter construction regulations. An important solution for this is triple-glazing, which is indispensable in building construction, especially in the context of ever faster rising raw material prices and stricter environmental protection regulations. Triple insulating glazings therefore make up an increasing part of the outwardly facing glazings.

Triple insulating glazings typically contain three panes of glass or polymeric materials separated by two individual spacers. It is placed on a double glazing by means of an additional spacer another disc. When mounting such a triple glazing very low tolerance requirements apply because the two spacers must be mounted in exactly the same height. Thus, the installation of triple glazing compared to double glazing is much more complex because either additional system components for the installation of another disc must be provided or a time-consuming multiple pass of a classic system is necessary.

The thermal insulation capacity of triple insulating glass is significantly increased compared to single or double glazing. With special coatings, such as low-E coatings, this can be further increased and improved. So-called low-E coatings offer an effective way of shielding infrared radiation even before entering the living space while allowing natural light to pass through. Low-E coatings are thermal radiation reflective coatings that reflect a significant portion of the infrared radiation, resulting in reduced warming of the living space in the summer. The most diverse low-E coatings are known, for example, from DE 10 2009 006 062 A1, WO 2007/101964 A1, EP 0 912 455 B1, DE 199 27 683 C1, EP 1 218 307 B1 and EP 1 917 222 B1. Such low-E coatings can not be applied to the middle pane of a prior art triple glazing because, when exposed to sunlight, the coating causes heating of the pane which results in failure of the adhesive bond between the center pane and spacers. Furthermore, adhesion of the functionalized center disk creates additional stresses. To compensate for these stresses, the center disc must be biased in the prior art.

EP 0 852 280 A1 discloses a spacer for double insulating glazings. The spacer comprises a metal foil on the bonding surface and a glass fiber content in the plastic of the base body. Such spacers are also commonly used in triple insulating glazings, with a first spacer mounted between a first outer disk and the inner disk and a second spacer mounted between a second outer disk and the inner disk. The two spacers must be mounted congruent to ensure a visually appealing appearance.

From WO 2012 095 266 A1 a triple insulating glazing with a segment for receiving lines or lighting means is known. The first pane and the second pane of the insulating glass are connected by a spacer, wherein in the space between these two panes, a third disc is arranged, which is connected via a further spacer with the first disc.

EP 2 584 135 A2 describes a triple insulating glazing comprising a first and a second glass pane, which are separated by a spacer, wherein a plastic pane is arranged between these two pane. The plastic disk is held by further spacers between the outer glass panes. The spacers of the plastic disc are preferably made of the same material as the plastic disc itself. Since the spacers of the plastic disc do not match the spacer between the first and second Connected disc, all three spacers must be positioned independently.

The spacer systems known from WO 2012 095 266 A1 and EP 2 584 135 A2 are also expensive to install and require a very precise installation of the individual components.

US 2007/0251 180 A1 discloses a wall construction whose discs are fixed by a groove.

WO 2010/1 15456 A1 discloses a hollow profile spacer with a plurality of hollow chambers for multiple glass panes comprising two outer panes and one or more central panes mounted in a groove-shaped receiving profile. The hollow chambers of the spacer are connected to each other via openings, so that an exchange of desiccant and pressure equalization between the chambers can take place. The spacer can be made both of polymeric materials as well as rigid metals, such as stainless steel or aluminum exist.

DE 10 2009 057 156 A1 describes a triple insulating glazing which comprises a shear-resistant spacer, which is shear-stiffly connected to both outer panes with a high-strength adhesive. The spacer has a groove in which the middle pane of the triple glazing is inserted. A flexible storage of the middle disc is carried out exclusively via a Butyldichtung located in the groove.

Object of the present invention is to provide a spacer for triple glazing, which allows a simplified installation of the glazing and an improved stress-free fixation of the middle pane, as well as to provide an economical method for mounting a triple glazing with inventive spacer.

The object of the present invention is achieved by a spacer for insulating glazings, an insulating glazing, a method for their assembly and their use according to the independent claims 1, 8, 1 1 and 14 solved. Preferred embodiments of the invention will become apparent from the dependent claims.

The spacer for insulating glazings according to the invention comprises at least one polymeric base body with a wall thickness d, which has a first wheel contact surface and a second wheel contact surface extending parallel thereto, a first glazing interior surface, a second glazing interior surface and an outer surface. In the polymeric base body, a first hollow chamber and a second hollow chamber and a groove are introduced. The groove extends parallel to the first disc contact surface and second disc contact surface and serves to receive a disc. The first hollow chamber is adjacent to the first glazing interior surface while the second hollow chamber is adjacent to the second glazing interior surface, the glazing interior surfaces being above the hollow chambers and the outer surface being below the hollow chambers. Above is in this context as the disk interior of a double glazing with inventive spacer facing and below facing away from the disk interior. Since the groove extends between the first glazing interior surface and the second glazing interior surface, it laterally delimits them and separates the first and second hollow chambers from one another. The side edges of the groove are formed by the walls of the first hollow chamber and the second hollow chamber. The groove forms a recess which is suitable for receiving the middle pane (third pane) of an insulating glazing. Thereby, the position of the third disc on two side edges of the groove and the bottom surface of the groove is fixed. The wall thickness d 'in the region of the side edges is less than the wall thickness d of the polymeric base body. If d 'is chosen smaller than d, the flexibility of the side edges can be increased, so that they compensate for a thermal expansion of the third disc and thus at any time a tension-free fixation is guaranteed.

Thus, the invention provides a one-piece double spacer ("double spacer") to which all three panes of triple glazing can be fixed, with the two outer panes (first pane and second pane) attached to the pane contact surfaces, while the middle one Disc (third disc) is inserted into the groove Base body is formed as a hollow profile, the side edges of the hollow chambers are flexible enough to yield on the one hand when inserting the disc in the groove and on the other hand to fix the disc stress-free. The spacer according to the invention thus enables a simplified yet accurate fit mounting of the triple glazing. When using the Doppelspacers invention is a slipping of two Einzelspacer, as used in the prior art, impossible. This eliminates the time-consuming adjustment of individual spacers, which is inevitable according to the prior art to ensure their congruent installation. Since the spacer according to the invention has only two disc contact surfaces, the gas loss rate of the insulating glazing relative to a glazing with two individual spacers according to the prior art can be reduced by 50%. Furthermore, error rates due to entry of water across the disc contact surfaces can also be reduced. Furthermore, the fixation of the third disc according to the invention is effected by a groove with flexible side edges and not by an adhesive connection. Thus, the spacer according to the invention allows the production of a triple glazing with a low-E coating on the third disc, without biasing the third disc is necessary. In an adhesive bond or otherwise rigid locking of the disc due to the low-E coating caused heating of the disc would promote failure of the adhesive bond. Furthermore, a bias of the third disc would be necessary to compensate for occurring voltages. When using the spacer according to the invention, however, eliminates the biasing process, whereby a further cost reduction can be achieved. By virtue of the tension-free fixing in a groove according to the invention, furthermore, the thickness and thus the weight of the third disk can advantageously be reduced.

Preferably, the bottom surface of the groove directly adjoins the outer surface of the polymeric base body, without extending one or both hollow chambers below the groove. This achieves the greatest possible depth of the groove, maximizing the area of the side flanks to stabilize the pane.

The hollow chambers of the spacer according to the invention not only contribute to the flexibility of the side flanks, but also lead to a weight reduction in comparison to a solid-shaped spacer and may be available to contain other components, such as a desiccant.

The first disc contact surface and the second disc contact surface represent the sides of the spacer at which the installation of the spacer, the mounting of the outer discs (first disc and second disc) of a glazing is done. The first disc contact surface and the second disc contact surface are parallel to each other.

The glazing interior surfaces are defined as the surfaces of the polymeric base body facing the interior of the glazing after installation of the spacer in insulating glazing. The first glazing interior surface lies between the first and the third pane, while the second glazing interior surface is arranged between the third and the second pane.

The outer surface of the polymeric base body is the side facing the glazing interior surfaces facing away from the interior of the insulating glazing in the direction of an outer insulating layer. The outer surface is preferably perpendicular to the disc contact surfaces. However, the portions of the outer surface closest to the disk contact surfaces may alternatively be inclined at an angle of preferably 30 ° to 60 ° to the outer surface in the direction of the disk contact surfaces. This angled geometry improves the stability of the polymer body and allows a better bonding of the spacer according to the invention with an insulating film. A planar outer surface that behaves perpendicular to the disk contact surfaces in its entire course, however, has the advantage that the sealing surface between spacers and disc contact surfaces is maximized and easier shaping facilitates the production process.

The groove corresponds in width to at least the thickness of the disk to be used.

Preferably, the groove is wider than the disc mounted therein, so that in addition an insert can be inserted into the groove, which causes slippage of the disc and a consequent noise during opening and closing of the window prevented. The insert also compensates for the thermal expansion of the third disc when heated, so that regardless of the climatic conditions, a tension-free fixation is guaranteed. Furthermore, the use of a liner is advantageous in terms of minimizing the variety of variants of the spacer. In order to keep the variety as low as possible and still allow a variable thickness of the middle disc, a spacer can be used with different deposits. The variation of the insert is much cheaper than the variation of the spacer in terms of production costs.

In another preferred embodiment, the spacer according to the invention is mounted without insert in the groove. Since the wall thickness d 'of the side flanks is reduced in comparison to the wall thickness d of the polymer base body, this already results in an increased flexibility of the side flanks. If d 'is chosen smaller than d, the flexibility of the side edges can be increased, so that they compensate for a thermal expansion of the third disc without the use of an insert and thus at any time a tension-free fixation is guaranteed. It has been found that a wall thickness of the side flanks of d '<0.85 d, preferably of d' <0.7 d, particularly preferably of d '<0.5 d, is particularly suitable for this purpose. When no liner is fitted in the groove, the first disc space and the second space between the discs are not sealed airtight from each other. This has the advantage that an air circulation can be generated, in particular if a pressure equalization system is integrated into the spacer.

In a further preferred embodiment, the described embodiments are combined, wherein both an insert is used and the wall thickness of the side edges is reduced. This compensates for the thermal expansion of the third disc both by the flexibility of the side edges and also by the insert. At the same time there remains the possibility to vary the thickness of the third disc to some extent and to compensate for this by the choice of the insert. In an advantageous embodiment, the insert is formed directly on the polymeric base body and thus formed integrally therewith, wherein the polymeric base body and the insert are coextruded. Alternatively, it would also be conceivable insert directly to the polymeric body for example, by making both components together in a two-component injection molding process.

The side flanks of the groove may be both parallel to the disc contact surfaces as well as inclined in one or the other direction. By a slope of the side edges in the direction of the third disc, a taper is generated, which can serve to fix the third disc targeted. Furthermore, curved side flanks are also conceivable, with only the middle section of the side flanks resting against the third pane. Such a curvature of the side edges is particularly advantageous in conjunction with a reduced wall thickness d 'of the side edges. The curved side edges have a very good spring action, especially for small wall thicknesses. Thereby, the flexibility of the side edges is further increased, so that a thermal expansion of the third disc can be compensated for particularly advantageous. In a preferred embodiment, the curved side edges of the disc are made of a different material than the polymeric base body and coextruded therewith. This is particularly advantageous because it allows the flexibility of the side flanks to be selectively increased by the choice of a suitable material while maintaining the rigidity of the polymeric base.

The polymeric base body preferably has an overall width of 10 mm to 50 mm, particularly preferably 20 mm to 36 mm, along the glazing interior surfaces. By choosing the width of the glazing interior surfaces of the distance between the first and third disc or between the third and second disc is determined. Preferably, the widths of the first glazing interior space and the second glazing interior space are equal. Alternatively, asymmetric spacers are possible in which the two glazing interior surfaces have different widths. The exact dimension of the glazing interior surfaces depends on the dimensions of the glazing and the desired space between the panes.

The polymeric base body preferably has a height of 5 mm to 15 mm, particularly preferably 5 mm to 10 mm, along the wafer contact surfaces. The groove preferably has a depth of 1 mm to 15 mm, particularly preferably 2 mm to 4 mm. As a result, a stable fixation of the third disc can be achieved.

The wall thickness d of the polymeric base body is 0.5 mm to 15 mm, preferably 0.5 mm to 10 mm, particularly preferably 0.7 mm to 1 mm.

The spacer preferably comprises an insulating film on the outer surface of the polymeric base body. The insulating film comprises at least one polymeric layer as well as a metallic layer or a ceramic layer. The layer thickness of the polymer layer is between 5 μm and 80 μm, while metallic layers and / or ceramic layers having a thickness of 10 nm to 200 nm are used. Within the layer thicknesses mentioned a particularly good tightness of the insulating film is achieved.

Particularly preferably, the insulating film contains at least two metallic layers and / or ceramic layers, which are arranged alternately with at least one polymeric layer. In this case, the outer layers are preferably formed by the polymeric layer. The alternating layers of the insulating film can be bonded or applied to one another in a variety of methods known in the art. Methods for the deposition of metallic or ceramic layers are well known to those skilled in the art. The use of an insulating film with alternating layer sequence is particularly advantageous in terms of the tightness of the system. An error in one of the layers does not lead to a loss of function of the insulation film. By comparison, even a small defect in a single layer can lead to complete failure. Furthermore, the application of several thin layers compared to a thick layer is advantageous, since the risk of internal adhesion problems increases with increasing layer thickness. Furthermore, thicker layers have a higher conductivity, so that such a film is thermodynamically less suitable.

The polymeric layer preferably comprises polyethylene terephthalate, ethylene vinyl alcohol, polyvinylidene chloride, polyamides, polyethylene, polypropylene, silicones, acrylonitriles, polyacrylates, polymethyl acrylates and / or copolymers or mixtures thereof. The Metallic layer preferably contains iron, aluminum, silver, copper, gold, chromium and / or alloys or mixtures thereof. The ceramic layer preferably contains silicon oxides and / or silicon nitrides.

The insulating film preferably has a gas permeation of less than 0.001 g / (m ² h).

The composite of polymeric base body and insulating film preferably has a PSI value less than or equal to 0.05 W / mK, particularly preferably less than or equal to 0.035 W / mK. The insulating film can be applied to the polymeric base body, for example by gluing. Alternatively, the insulating film can be coextruded with the base body.

The polymeric base body preferably contains a drying agent, preferably silica gels, molecular sieves, CaCl ₂ , Na ₂ SO ₄ , activated carbon, silicates, bentonites, zeolites and / or mixtures thereof. The desiccant is preferably incorporated in the body. Particularly preferably, the desiccant is in the first and second hollow chamber of the body.

In a preferred embodiment, the first glazing interior surface and / or the second glazing interior surface have at least one opening. Preferably, a plurality of openings are attached to both glazing interior surfaces. The total number of openings depends on the size of the glazing. The openings connect the hollow chambers with the disc spaces, whereby a gas exchange between them is possible. As a result, a recording of humidity is allowed by a desiccant located in the hollow chambers and thus prevents fogging of the discs. The openings are preferably designed as slots, particularly preferably as slots with a width of 0.2 mm and a length of 2 mm. The slots ensure optimum air exchange without the possibility of desiccants penetrating from the hollow chambers into the interpane spaces.

The polymeric base preferably contains polyethylene (PE), polycarbonates (PC), polypropylene (PP), polystyrene, polybutadiene, polynitriles, polyesters, polyurethanes, polymethylmethacrylates, polyacrylates, polyamides, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), preferably acrylonitrile-butadiene Styrene (ABS), acrylic ester Styrene-acrylonitrile (ASA), acrylonitrile-butadiene-styrene / polycarbonate (ABS / PC), styrene-acrylonitrile (SAN), PET / PC, PBT / PC and / or copolymers or blends thereof.

Preferably, the polymeric base body is glass fiber reinforced. By choosing the glass fiber content in the body, the thermal expansion coefficient of the body can be varied and adjusted. By adjusting the coefficient of thermal expansion of the polymeric base body and the insulating film, temperature-induced stresses between the different materials and spalling of the insulating film can be avoided. The main body preferably has a glass fiber content of 20% to 50%, particularly preferably from 30% to 40%. The glass fiber content in the polymer base body simultaneously improves the strength and stability.

The invention further comprises an insulating glazing having at least a first pane, a second pane and a third pane and a circumferential spacer according to the invention comprising the panes. The first disc is applied to the first disc contact surface of the spacer, while the second disc rests against the second disc contact surface. The third disc is inserted into the groove of the spacer.

At the corners of the insulating glazing, the spacers are preferably linked together by corner connectors. Such corner connectors may for example be designed as a plastic molded part with seal, in which two provided with a fermentation section spacers collide. In principle, the most varied geometries of insulating glazing are possible, for example rectangular, trapezoidal and rounded shapes. For producing round geometries, the spacer according to the invention can be bent, for example, in the heated state.

The panes of the insulating glazing are connected to the spacer via a gasket. Between the first disc and the first disc contact surface and / or the second disc and the second disc contact surface, a seal is attached thereto. The seal preferably comprises a polymer or silane-modified polymer, particularly preferably organic polysulfides, silicones, room-temperature-crosslinking silicone rubber, high-temperature-crosslinking polymers Silicone rubber, peroxide-crosslinked silicone rubber and / or addition-crosslinked silicone rubber, polyurethanes, butyl rubber and / or polyacrylates.

In the edge region between the outer surface of the spacer according to the invention and the outer edges of the discs, an outer insulation is circumferentially filled. As external insulation, for example, a plastic sealing compound is used. The outer insulation preferably comprises polymers or silane-modified polymers, particularly preferably organic polysulfides, silicones, RTV silicone rubber, high-temperature cure (HTV) silicone rubber, peroxide-crosslinked silicone rubber and / or addition-crosslinked silicone rubber, polyurethanes, butyl rubber and / or polyacrylates.

The first pane, the second pane and / or the third pane of the insulating glazing preferably contain glass and / or polymers, more preferably quartz glass, borosilicate glass, soda-lime glass, polymethyl methacrylate and / or mixtures thereof.

The first disc and the second disc have a thickness of 2 mm to 50 mm, preferably 3 mm to 16 mm, both discs can also have different thicknesses. The third disc has a thickness of 1 mm to 4 mm, preferably 1 mm to 3 mm and particularly preferably 1, 5 mm to 3 mm. The spacer according to the invention allows by the stress-free fixation an advantageous reduction of the thickness of the third disc with the same stability of the glazing. Preferably, the thickness of the third disc is less than the thicknesses of the first and second discs. In one possible embodiment, the thickness of the first disc is 3 mm, the thickness of the second disc is 4 mm and the thickness of the third disc is 2 mm. Such an asymmetrical combination of the thicknesses leads to a considerable improvement of the acoustic damping.

The insulating glazing is filled with a protective gas, preferably with a noble gas, preferably argon or krypton, which reduce the heat transfer value in the insulating glazing gap.

The third pane of the insulating glass preferably has a low-E coating. The third pane of the insulating glass is preferably not biased. In a further embodiment, the insulating glazing comprises more than three panes. In this case, the spacer may include a plurality of grooves that can accommodate more discs. Alternatively, several disks could be formed as a laminated glass pane.

The invention further comprises a method for producing an insulating glazing according to the invention comprising the steps:

a) inserting the third disc in the groove of the spacer, b) attaching the first disc on the first disc contact surface of the spacer,

c) attaching the second disc on the second disc contact surface of the spacer and

d) pressing the disc assembly.

After inserting the third disc in the groove of the spacer this pre-assembled component can be processed on a conventional double-glazing system known in the art. The costly installation of additional plant components or a loss of time in multiple pass a plant can thus be avoided. This is particularly advantageous in terms of productivity gain and cost reduction. According to the prior art, a plurality of spacers or a plurality of individual components of a spacer are required for mounting a triple glazing. The precise adjustment of these components is time-consuming and can not be done on a classic double-glazing system. Furthermore, no biasing of the third disc is necessary even when using low-E or other functional coatings on the third disc according to the inventive method, since the spacer according to the invention fixes the disc stress-free in its scope. By the spacer according to the invention, the production of a triple glazing can thus be considerably simplified.

In a preferred embodiment of the method, the spacer is first preformed into a rectangle open on one side. In this case, for example, three spacers can be provided with a fermentation section and linked at the corners by corner connectors. Instead, the spacers can also be welded directly to each other, for example by means of Ultrasonic welding. In the U-shaped spacers arranged from the open side of the arrangement, the third disc is inserted into the groove of the spacer. The remaining open edge of the third disc is then also closed with a spacer. Optionally, an insert may be applied to the disc edges prior to assembly of the spacers. Thereafter, the processing of the preassembled component takes place according to the inventive method, wherein in the next step, the first disc is attached to the first disc contact surface.

Preferably, the disc gaps between the first disc and the third disc and between the second disc and the third disc are filled with a protective gas before pressing the disc assembly.

The invention further includes the use of a spacer according to the invention in multiple glazings, preferably in insulating glazings, particularly preferably in triple insulating glazings.

In the following the invention will be explained in more detail with reference to drawings. The drawings are purely schematic representations and not to scale. They do not limit the invention in any way. Show it:

FIG. 1 shows a possible embodiment of the spacer according to the invention,

FIG. 2 shows a cross-section of the insulating glazing according to the invention and FIG

FIG. 3 shows a flow chart of a possible embodiment of the method according to the invention.

FIG. 1 shows a cross section of the spacer (I) according to the invention. The glass-fiber-reinforced polymer base body (1) comprises a first wheel contact surface (2.1), a second wheel contact surface (2.2) extending parallel thereto, a first glazing interior surface (3.1), a second glazing interior surface (3.2) and an outer surface (4). Between the outer surface (4) and the first glazing inner surface (3.1) is a first hollow chamber (5.1), while a second hollow chamber (5.2) between the Outside surface and the second glazing interior surface (3.2) is arranged. Between the two hollow chambers (5.1, 5.2) there is a groove (6), which runs parallel to the disc contact surfaces (2.1, 2.2). The side edges (7) of the groove (6) are thereby formed by the walls of the two hollow chambers (5.1, 5.2), while the bottom surface of the groove (6) directly adjacent to the outer surface (4). Thus, a maximum depth of the groove (6) is achieved. The side flanks (7) of the groove (6) are inclined inwards in the direction of a disc to be received in the groove (6). This results in the amount of the glazing interior surfaces (3.1, 3.2), a taper of the groove (6), which favors the fixation of a disc in the groove (6). The wall thickness d of the polymeric base body is 1 mm, while the reduced wall thickness d 'in the region of the side edges is 0.8 mm. The outer surface (4) extends mostly perpendicular to the disc contact surfaces (2.1, 2.2) and parallel to the glazing interior surfaces (3.1, 3.2). However, the portions of the outer surface (4) closest to the disc contact surfaces (2.1, 2.2) are inclined at an angle of preferably 30 ° to 60 ° to the outer surface (4) in the direction of the disc contact surfaces (2.1, 2.2). This angled geometry improves the stability of the polymeric base body (1) and allows better bonding of the spacer (I) according to the invention with an insulating film. The polymeric base body (1) contains styrene-acrylic-N itryl (SAN) with about 35 wt.% Glass fiber. The glazing interior surfaces (3.1, 3.2) have openings (8) at regular intervals, which connect the hollow chambers (5.1, 5.2) with the air space above the glazing interior surfaces (3.1, 3.2). The spacer (I) has a height of 6.5 mm and a total width of 34 mm. The groove (6) has a depth of 3 mm, while the first glazing interior surface (3.1) is 16 mm wide and the second glazing interior surface (3.2) is 16 mm wide. The total width of the spacer (I) is obtained as the sum of the widths of the glazing interior surfaces (3.1, 3.2) and the thickness of the third disc (15) with insert (9) to be inserted into the groove (6).

FIG. 2 shows a cross section of the insulating glazing according to the invention with a spacer (I) according to FIG. 1. The first pane (13) of the triple insulating glazing is connected via a seal (10) to the first pane contact surface (2.1) of the spacer (I), while the second disc (14) via a seal (10) with the second disc contact surface (2.2) is connected. The seal (10) is made of butyl rubber. In the groove (6) of the spacer is a third disc (15) inserted over an insert (9). The insert (9) surrounds the edge of the third disc (15) and fits flush into the groove (6). The insert (9) consists of ethylene-propylene-diene rubber. The insert (9) fixes the third disc (15) stress-free and compensates for thermal expansion of the disc. Furthermore, the insert (9) prevents noise by slipping of the third disc (15). The space between the first disk (13) and the third disk (15) is defined as the first disk space (17.1) and the space between the third disk (15) and second disk (14) as the second disk space (17.2). The first glazing interior surface (3.1) of the spacer (I) lies in the first space between the panes (17.1), while the second glazing interior space (3.2) is arranged in the second pane space (17.2). About the openings (8) in the glazing interior surfaces (3.1, 3.2), the disc spaces (17.1, 17.2) with the respective underlying hollow chamber (5.1, 5.2) are connected. In the hollow chambers is a desiccant (1 1), which consists of molecular sieve. Through the openings (8) there is a gas exchange between the hollow chambers (5.1, 5.2) and the disc spaces (17.1, 17.2) instead, wherein the desiccant (1 1) the humidity from the space between the panes (17.1, 17.2) withdraws. On the outer surface (4) of the spacer (I), an insulating film (12) is applied, which reduces the heat transfer through the polymeric base body (1) in the disc spaces (17). The insulating film (12) can be attached, for example with a polyurethane hot melt adhesive on the polymeric body (1). The insulating film (12) comprises four polymeric layers of polyethylene terephthalate having a thickness of 12 μηη and three metallic layers of aluminum with a thickness of 50 nm. The metallic layers and the polymeric layers are each mounted alternately, wherein the two outer layers of polymeric Layers are formed. The first disc (13) and the second disc (14) protrude beyond the spacer (I), so that a peripheral edge region is created, which is filled with an outer insulation (16). This outer insulation (16) is formed by an organic polysulfide. The first disc (13) and the second disc (14) are made of soda-lime glass having a thickness of 3 mm, while the third disc (15) is made of soda-lime glass having a thickness of 2 mm.

FIG. 3 shows a flow chart of a possible embodiment of the method according to the invention. First, the third disc (15) is provided and washed. Optionally, an insert (9) is then applied to the edges of the third disc (15). The third disc (15) is now inserted into the groove (6) of the spacer (I) according to the invention. In this case, for example, three spacers (I) can be preformed to a rectangle open on one side, wherein the third disc (15) is inserted over the open side into the groove (6). Subsequently, the fourth disc edge is closed with a spacer (I). The corners of the spacers are either welded or linked together via corner connectors. These first three process steps serve to prepare a third disk (15) with a spacer (I) according to the invention. Such a preassembled component can then be further processed in a classic double-glazing system. In the double-glazing installation, the first pane (13) and the second pane (14) are mounted on the pane contact surfaces (2.1, 2.2) via a respective seal (10). Optionally, a protective gas can be introduced into the interpane spaces (17.1, 17.2). In a final step, the insulating glazing is pressed.

LIST OF REFERENCE NUMBERS

I spacers

1 polymeric base body

2 disc contact surfaces

2.1 first disc contact surface

2.2 second disc contact surface

3 glazed interior surfaces

3.1 first glazed interior space

3.2 second glazing interior space

4 outer surface

5 hollow chambers

5.1 first hollow chamber

5.2 second hollow chamber

6 groove

7 side flanks

8 openings

9 deposit

10 seal

1 1 desiccant

12 insulation film

13 first disc

14 second disc

15 third disc

16 outer insulation

17 pane interspaces

17.1 first space between the panes

17.2 second disc space

Claims

claims

1 . Spacer (I) for insulating glazings at least comprising a polymeric base body (1) with a wall thickness d comprising a first disc contact surface (2.1) and a second disc contact surface (2.2) extending parallel thereto, a first glazing interior surface (3.1), a second glazing interior surface (3.2), an outer surface (4), a first hollow chamber (5.1) and a second hollow chamber (5.2),

in which

a groove (6) for receiving a pane parallel to the first pane contact surface (2.1) and the second pane contact surface (2.2) extends between the first glazing interior surface (3.1) and the second glazing interior surface (3.2),

the first hollow chamber (5.1) adjoins the first glazing interior surface (3.1) and the second hollow chamber (5.2) adjoins the second glazing interior surface (3.2),

- The side edges (7) of the groove (6) from the walls of the first hollow chamber (5.1) and the second hollow chamber (5.2) are formed and

- The wall thickness d 'in the region of the side edges (7) is less than the wall thickness d of the polymeric base body (1).

2. spacer (I) for insulating glazings according to claim 1, wherein the side edges (7) of the groove (6) has a liner (9), preferably a liner (9) containing an elastomer, particularly preferably containing ethylene-propylene-diene rubber, include.

3. Spacer (I) for insulating glazings according to claim 1 or 2, wherein for the wall thickness d 'in the region of the side edges (7) d' <0.7 d, preferably d '<0.5 d, applies.

4. Spacer (I) for insulating glazings according to one of claims 1 to 3, wherein an insulating film (12) on the outer surface (4) of the polymeric base body (1) is applied, the at least one polymeric layer and a metallic layer or a ceramic layer, preferably at least two metallic layers and / or ceramic layers, which are arranged alternately with at least one polymeric layer.

5. spacer (I) for insulating glazes according to one of claims 1 to 4, wherein the polymeric base body (1) a desiccant (1 1), preferably silica, molecular sieves, CaCl ₂ , Na ₂ S0 ₄ , activated carbon, silicates, bentonites, zeolites and / or mixtures thereof.

6. Spacer (I) for insulating glazings according to one of claims 1 to 5, wherein the first glazing interior surface (3.1) and / or the second glazing interior surface (3.2) at least one, preferably a plurality of openings (8), the hollow chambers (5.1, 5.2 ) with the space between the panes (17.1, 17.2).

7. Spacer (I) for insulating glazings according to one of claims 1 to 6, wherein the polymeric base body (1) polyethylene (PE), polycarbonates (PC), polypropylene (PP), polystyrene, polybutadiene, polynitriles, polyesters, polyurethanes, polymethylmethacrylates, Polyacrylates, polyamides, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), preferably acrylonitrile-butadiene-styrene (ABS), acrylic ester-styrene-acrylonitrile (ASA), acrylonitrile-butadiene-styrene / polycarbonate (ABS / PC), styrene-acrylonitrile ( SAN), PET / PC, PBT / PC and / or copolymers or mixtures thereof.

8. insulating glazing comprising at least a first disc (13), a second disc (14) and a third disc (15) and a circumferential spacer comprising the discs (I) according to one of claims 1 to 7,

in which

the first disc (13) bears against the first disc contact surface (2.1), the second disc (14) bears against the second disc contact surface (2.2) and

the third disc (15) is inserted into the groove (6) of the spacer (I).

9. insulating glazing according to claim 8, wherein between the first disc (13) and the first disc contact surface (2.1) and / or the second disc (14) and the second disc contact surface (2.2) a seal (10) is mounted and the seal (10) is preferably a polymer or silane-modified polymer, more preferably organic polysulfides, silicones, room temperature crosslinking silicone rubber, high temperature vulcanizing silicone rubber, peroxidischvernetzten silicone rubber and / or addition-crosslinked silicone rubber , Polyurethanes, butyl rubber and / or polyacrylates.

Insulating glazing according to claim 8 or 9, wherein the first pane (13), the second pane (14) and / or the third pane (15) glass and / or polymers, preferably quartz glass, borosilicate glass, soda-lime glass, polymethyl methacrylate and / or mixtures thereof.

A process for producing an insulating glazing according to one of claims 8 to 10, wherein at least

a) the third disc (15) is inserted into the groove (6) of the spacer (I),

b) the first disc (13) is mounted on the first disc contact surface (2.1) of the spacer (I),

c) the second disc (14) on the second disc contact surface (2.2) of the spacer (I) is mounted and

d) the disc assembly of the discs (13, 14, 15) and the spacer (I) is pressed together.

The method of claim 1 1, wherein first the spacer (I) is preformed to a rectangular open on one side, the third disc (15) is inserted into the groove (6) of the spacer (I) and the remaining disc edge with a spacer (I) is closed.

Method according to one of claims 1 1 or 12, wherein the interpane spaces (17) between the first disc (13) and third disc (15) and between the second disc (14) and third disc (15) are filled with a protective gas.

14. Use of a spacer (I) according to one of claims 1 to 7 in multiple glazings, preferably in insulating glazings, particularly preferably in triple insulating glazings.