EP2526247A2

EP2526247A2 - Composite edge clamp for an insulating glass unit, composite edge of an insulating glass unit, insulating glass unit comprising a composite edge clamp and spacer for an insulating glass unit

Info

Publication number: EP2526247A2
Application number: EP11701618A
Authority: EP
Inventors: Jörg LENZ; Ferdinand Bebber; Peter Cempulik; Nils Schedukat; Norbert Deckers; Henrik Stephan
Original assignee: Technoform Glass Insulation Holding GmbH
Current assignee: Technoform Glass Insulation Holding GmbH
Priority date: 2010-01-20
Filing date: 2011-01-19
Publication date: 2012-11-28
Anticipated expiration: 2031-01-19
Also published as: PL2526247T3; CN102770616B; WO2011088994A2; CN102770616A; WO2011088994A3; US9487994B2; EP2526247B1; US20120297707A1

Abstract

The invention relates to a composite edge clamp which extends in a longitudinal direction (z) with a constant cross-section, as viewed in the cross-section (x-y) perpendicular to the longitudinal direction, for an insulating glass unit, comprising a substantially U-shaped clamp body (30) made of a first material having a specific thermal conductivity ≤ 0.3 W/(mK), said body comprising at least one base (3c, 3d), and wherein at least two tubs (3w) for receiving adhesive (4) and panes (2a, 2b, 2c) of an insulating glass unit are defined by the at least one base (3c, 3d) and a first side wall (3a) and a second side wall (3b) that form the limbs of the U shape, and a gas diffusion-tight diffusion barrier layer (11, 12, 13, 14, 14') that is designed on or in the clamp body (30), wherein the diffusion barrier layer (11, 12, 13, 14, 14') originates from the inside walls (3e, 3we, 3wa, 3wb, 3wc, 3wd) of the tubs (3w) and extends continuously between two tubs (3w) either along the outside of the U shape (11) of the clamp body (30) or through (13, 14, 14') the clamp body (30).

Description

Edge-band clip for insulating glass unit, Randyerbund an insulating glass unit, insulating glass unit with edge-band clip and spacer for insulating glass unit

The present invention relates to an edge joint clip for an insulating glass unit, an edge assembly of an insulating glass unit, an edge-clipped insulating glass unit, and a spacer for an insulating glass unit.

In the prior art, edge bonding in insulating glass units with two or more panes (multi-pane insulating glass = MIG) is usually achieved by the use of spacers between the panes of the MIG unit and a back cover e.g. made of butyl. Such a composite edge glazing unit, as shown by way of example in Fig. 11, is then inserted into a frame or other fixture for use as a window, door or façade element. FIG. 11 shows a MIG unit according to the prior art with three writing 2, 2 spacers 8 arranged between them and secondary sealant 9 arranged on the sides of the spacers 8 facing away from the interpane spaces 7.

Examples of such edge-bonded insulating glass units are described in US 2008/01 10109 A1 (DE 10 2004 062 060 B3), DE 20 2005 016 444 Ul, US Pat. No. 5,460,862 (DE 43 41 905 A1), US Pat. No. 4,149,348, US Pat. No. 3,758,996, US Pat. US 2,974,377, US 2,235,680, US 2,741,809 or US 2,838,809, for example.

An edge bond without a separate spacer is e.g. in US 4,015,394, which discloses a MIG unit with two disks with air or nitrogen filling between the disks and a plastic edge seal with a pedestal between the disks on which a metal layer is impermeable against volatile gases or elements escaping from the plastic of the edge seal bracket is shown in US 2,525,717 or US 2,934,801. Spacers are e.g. from US 6,339,909 (DE 198 05 265 AI) or WO 2006/027146 AI known.

For example, frames are shown in US Pat. No. 3,872,198, GB 1 520 257 or WO 00/05474 A1, into which the panes of an insulating window are inserted without prior production of a marginal composite. In the case of insulating glass units with edge bonding, the mechanical strength is usually produced via the secondary seal, which usually consists of polysulfide, polyurethane, silicone or similar materials. In many common edge assemblies, the MIG units must be placed on pads when inserted into the frames to protect the contact surfaces of the glasses against chipping.

It is an object of the present invention to provide an edge joint clip, an edge seal for an insulating glass unit, a peripheral edge insulating unit, and a spacer for an insulating glass unit which allow improved heat insulating properties with comparatively simple manufacture.

This object is achieved by an edge composite clip for an insulating glass unit according to claim 1 or an edge seal for an insulating glass unit according to claim 8 or 9 or an insulating glass unit with edge joint clip according to claim 10 or a spacer according to claim 1 1.

Further developments of the invention are specified in the dependent claims.

It is possible to reduce the heat loss through the pane edge of an insulating glass unit. In particular, compared to the use of a secondary seal, the heat losses are significantly reduced.

The edge joint clip allows a comparatively small dimensioning of the profile, which in turn allows to bring a corresponding MIG unit without secondary seal in a, compared to the prior art, deeper, thermally favorable position (the discs) in the frame.

The comparatively small dimensioning of the profile of the edge composite clamp allows a smaller and thus thermally more favorable cross-sectional area in the heat conduction direction of the frame or the frame when maintaining a conventional insertion depth.

The edge clip allows the use of blocks to be eliminated. The use of the edge composite clamp with integrated gas diffusion barrier makes it possible to minimize the layer thickness of the gas diffusion barrier.

Further features and expediencies will become apparent from the description of embodiments with reference to FIGS.

From the figures show:

1 shows a cross-sectional view through an edge bond of a triple insulating glass unit, in which several embodiments without a spacer are shown;

FIG. 2 shows a cross-sectional view through an edge composite of a triple insulating glass unit, in which several embodiments without a spacer are shown; FIG.

Fig. 3 is a cross-sectional view through an edge bond of a triple insulating glass unit, showing a further embodiment without a spacer;

Fig. 4 shows a sixth embodiment with spacer and a modification thereof;

5 shows a seventh embodiment with spacer and a modification thereof;

Fig. 6 shows an eighth embodiment with spacer and a modification thereof;

Fig. 7 shows a ninth embodiment with spacer and a modification thereof;

Fig. 8 shows a tenth embodiment with spacer and a modification thereof;

FIG. 9 is an enlarged view of a portion of the illustration of the eighth embodiment in FIG. 6; FIG.

Fig. 10 shows an eleventh embodiment of a spacer and modifications thereof; and

Fig. 1 1 a conventional MIG unit in cross section.

FIG. 1 shows a first embodiment of a marginal composite clip 3 in the edge joint of a multi-pane insulating glass unit (MIG unit) 1. In the first embodiment, the layers denoted by the reference numerals 12, 13, 14 are omitted, which are described with reference to FIG be described in further embodiments. In the first embodiment described first, only the layer designated by the reference numeral 11, which will be described later, is present. This is sent ahead for a better understanding of the description. The marginal composite clip 3 comprises an edge composite clip body 30 made of a heat insulating material having a specific thermal conductivity <0.3 W / (m) such as a corresponding polyolefin, preferably polypropylene (PP), or polyvinyl chloride (PVC) or a polycarbonate-ABS blend, the thermal conductivity in the range of 0.2 W / (mK), on. As will be described later, these materials are preferably provided with suitable fillers such as glass fibers.

In Fig. 1 and all subsequent drawings, the horizontal direction x, the vertical direction y and the direction protruding from the paper plane z are called. The corresponding directions are shown in Fig. 1 with a coordinate system. The clamp body 30 extends in a longitudinal direction z having a constant cross section in each plane (x-y) perpendicular to its longitudinal direction z, as shown in FIG. The clamp body 30 has a U-shape in cross section. The U-shape is formed by two parallel side walls 3a, 3b which form the legs of the U-shape and a base wall 3e which runs perpendicular to the side walls 3a, 3b in the transverse direction 3x and connects the two side walls 3a, 3b. The U-shape has a height hl in the vertical direction y, wherein the side walls have a height h2.

In the first embodiment shown in Fig. 1, two pedestals 3c, 3d are provided between the legs of the U-shape projecting vertically in the vertical direction y from the base wall 3e in the same direction as the side walls 3a, 3b and spaced apart from each other and at a distance from the side walls 3a, 3b in the longitudinal direction z, as the side walls 3a, 3b, extend. This is also evident from the statement that the edge composite clip 3 has a constant cross section in the longitudinal direction z, as shown in FIG.

For the embodiment shown in Fig. 1, one must think of the sockets 3c, 3d, the layers 12, 14 as absent. Incidentally, both pedestals 3c, 3d have a cross-sectional shape as shown for the left pedestal 3c in FIG.

By the corresponding configuration of the side walls 3a, 3b and the pedestals 3c, 3d, together with the base wall 3e, three upwardly open troughs 3w are defined, the first trough 3w between the first side wall 3a and the first pedestal 3c, the second trough 3w between the first pedestal 3c and the second pedestal 3d, and the third tub 3w between see the second base 3d and the second side wall 3b is defined, each with the base wall 3e as the bottom. The first tray 3w is bounded in the transverse direction x by an outer wall 3wa of the first side wall 3a, the upper tray 3we of the bottom 3e and a side wall 3wb of the first base 3c. Similarly, the second and third wells 3w are bounded by the upper well 3we of the bottom 3e and respective side walls 3wc, 3wd and 3wb of the first pedestal 3c, the second pedestal 3d and the second sidewall 3b. At the upper ends of these side walls in the vertical direction y, protrusions 3v are formed in the first embodiment shown in FIG. The height hv in the height direction y of these projections is preferably in the range of 1/5 to 1/12 of the height h2, preferably 1/8 to 1/10 of h2. The projections 3v are optional. Alternatively, the side walls of the trays 3w may also extend in the height direction exclusively perpendicular to the transverse direction x or in the vertical direction y such that the tray 3w is tapered in the height direction y towards the opening. Preferably, the projections 3v are also tapered.

In the first embodiment, a gas diffusion barrier 11 is provided, which is formed as a gas-diffusion-tight metal foil or metal layer or foil or layer of a gas-diffusion-tight plastic. Gas diffusion tight means that it is formed with a thickness that results in the formation of a gas diffusion barrier that is gas tight in the sense of DIN EN 1279 Part 3 (<1% gas loss / year for argon). For a metal foil or a metal layer, such a gas diffusion tightness is reliably achieved for a layer thickness <0.2 mm. Preferably, the layer thickness when using metal, e.g. Stainless steel, galvanized steel or the like <0, 1 mm, preferably <0.05 mm, more preferably <0.01 mm. An exact lower limit can not be specified in isolation, but it is clearly determined by the previously defined gas tightness for those skilled in the art. A lower limit of 1 μτη or 2 μηι is not unrealistic. A suitable plastic would be EVOH, e.g. Soarnol®, manufacturer Nippon Gohsei.

The gas diffusion barrier 1 1 extends, in the presence of the projections 3 v, from the inside outside 3wa of the first side wall 3 a, that is, the first trough 3w in the transverse direction x outside bounding wall, on the projection 3v on the first side wall 3a over the entire outside of the bracket body 30, ie, over the first side wall 3a, the base wall 3e, and the second side wall 3b to the inside outside 3wb the second side wall 3b which defines / defines the third tray 3b on the outside in the transverse direction x. Of course, the diffusion barrier 11 may also extend further down along the outer sides 3wa, 3wb in the vertical direction y, but this is not absolutely necessary in terms of the function.

As can be clearly seen from FIG. 1, this shape of the edge clamp 3 defines three trays 3w, into which glass panes 2 of an insulating glass unit can be inserted, which can then be glued and sealed in the trays 3w by means of a gas-diffusion-tight adhesive 4 such as butyl ,

The width in the transverse direction x of the trays 3w is dimensioned such that it corresponds to the thickness of the disks 2 in the transverse direction x at the opening side, where the projections 3v are opposite in FIG. This is desirable for aesthetic reasons, since when using the insulating glass unit on the disc spaces 7, these points are visible. It is also desirable from a technical point of view, so that no glue 4 emerges. In order that the wells 3w need not be completely filled with adhesive 4, it is advantageous if the diffusion barrier 11 is further along the walls 3wa, 3wb, e.g. by 1/6 to 1/10 of the height h2, preferably 1/8, further than the projections 3v is pulled down.

In the assembled state of the insulating glass unit, as shown in Fig. 1, causes the diffusion barrier 1 1 in cooperation with the gas-diffusion-tight adhesive 4, which, for. Butyl can be that a gas-diffusion-tight mounting of the discs 2 is achieved without secondary sealant (see Fig. 3) must be used. The mechanical strength of the assembly is provided over the bracket body 30, in addition to providing edge protection, etc.

The layer thickness of the diffusion barrier 1 1 has already been described. It is hereinafter referred to, as shown in Fig. 1, h5 with respect to the height of the edge composite clip 3 and dl with respect to a layer thickness. The base wall 3e of the edge composite clip 3 has a height h3 which is formed by the height h4 of the bracket body 30 in the region of the base wall 3e and the layer thickness h5 = dl of the diffusion barrier 11. The height h4 is preferably in the range 1 to 5 mm, preferably 1 to 3 mm, preferably about 2 mm, so in that the height h3 is substantially equal to the height h4, since the amount of h5 is negligible in comparison, in particular in the preferred embodiments with h5 <0.01 mm.

The height h2 is preferably in the range 4 to 15 mm, preferably 5 to 10 mm, more preferably 5 to 8 mm. Therefore, the height h1 is preferably not larger than 25 mm, more preferably not larger than 20 mm, still more preferably not larger than 15 mm, preferably in the range of 7 to 10 mm.

The widths of the pedestals 3 c, 3 d may differ and, depending on the thickness of the respective glass panes 2a, 2b, 2c to be used in the transverse direction x, the corresponding spacings of the pedestals from the side walls or from one another may correspond to the thickness of the pane to be different (or equal).

Now, a second embodiment will be described with reference to FIG. Here, the layers 1 1, 13, 14 are disregarded, and only the layer 12 on the first and second sockets 3 c, 3d is present. This layer 12 is in turn a diffusion barrier as the diffusion barrier 1 1, and for the layer thickness dl and the materials and the extension in the height direction y, what is said for the diffusion barrier 11 applies. That is, the diffusion barrier 12 extends on top of the pedestals 3c and on both sides beyond the projections 3v (if present) except for the sidewalls 3wc and 3wd, respectively, depending on the intended degree of filling of the tubs 3w with adhesive 4, to a corresponding one Depth. In the presence of the protrusions 3v, which measure in the range of 1/5 to 1/12 of h2 in the height direction y, about the same in the depth. If the protrusions 3v are absent, to a corresponding depth (2/5 to 1/6 of h2), depending on the intended filling of the tub 3w with adhesive 4.

In Fig. 1, an adhesive bead is shown on the first base 3c, which consists of a known molecular sieve 5 (5a). The molecular sieve 5 may also be referred to as a desiccant. In the second base 3d, a recess 3u is shown, which is filled with a molecular sieve / desiccant 5 (5b). The recess 3u is closed with a cover 6 having perforations 6h (in a known manner) so that the desiccant can communicate with the space between the panes 7. In the embodiment shown in FIG. Shape of the socket 3d, the diffusion barrier 12 is formed such that it lines the recess, ie all the inner walls of the recess 3u (not the lid 6) completely covered. The first and second pedestals 3c, 3d may also be both equally formed in both manners. The corresponding application of the molecular sieve 5a as a bead or the molecular sieve 5b in a recess 3u, if necessary. Chamber with cover and perforations, can of course also be provided in the first embodiment. However, then the diffusion barrier 12 is missing, since there the diffusion barrier 1 1 is present. Alternatively, the recess 3u may be used to insert a container for a molecular sieve / desiccant 5. That is, instead of introducing the molecular sieve / desiccant 5 directly into the recess / recess 3u, it is configured to receive and fix a container, eg, by clipping or snapping or gluing or the like, in which a molecular sieve / desiccant 5 is contained , The container is in turn then not formed diffusion-tight to the space between the panes 7, for example, by being open at the top or perforations ufweist or is designed with a gaspermeablemoberseite.

Now, a third embodiment will be described with reference to FIG. Only the layer 13 is present. The layers 1 1, 12, 14 are not present. In the third embodiment, the diffusion barrier 13 is again a layer of the materials and with the respective thicknesses, as has been described for the diffusion barrier 1 1 in the first embodiment. In this case, the diffusion barrier 13 extends from the inner side outside 3wa of the first side wall 3 a, which limits the first trough 3 w outward, continuously up to the inner side 3wb of the second wall 3b, the third trough 3w in the transverse direction to the outside It is essential that the diffusion barrier 13 comes into contact with the adhesive 4. It could also extend through the clamp body 30 from the base wall 3e which bounds the first and third wells 3w, respectively. It is not important whether it extends through the insulating body or along the bottoms of the first to third pan 3w.

Now, a fourth embodiment will be described with reference to FIG. In the fourth embodiment, the layers 1 1, 12, 13 are not present, but only the two diffusion barriers 14, which are again formed as layers with the thickness dl and the corresponding materials which have already been described for the first embodiment. The diffusion barriers 14 extend in the transverse direction x transversely through the pedestals 3c, 3d respectively up to the wells 3w located on the two outer sides of the pedestals.

Fig. 2 shows a modification of the fourth embodiment. In the modification of the fourth embodiment, the layers 1 1, 12, 14 are not present, but only the two diffusion barriers 14 ', which are again formed as layers with the thickness dl and the corresponding materials, which have already been described for the first embodiment. The diffusion barriers 14 'extend continuously (like the diffusion barriers 14) from the inner walls of two adjacent trays 3w, but in this case not from the inner side walls 3wc, 3wd but from the bottom walls 3we of the trays 3e through the staple body 30 It is preferred to be transversely x below the level of the bottom walls 3we, but as in all other embodiments, to have continuous, uninterrupted communication with the interior walls of the trays. In the modification shown, this is realized by the U-shape of the layer which is flat in cross-section (x-y).

All other details of the first embodiment apply equally to the second to fourth embodiments.

When using the second, third and fourth embodiment in an insulating glass unit, as shown in Fig. 1, 2, in turn, as in the first embodiment, effective diffusion barriers for the interpane spaces 7 result by cooperation of the respective diffusion barriers 12, 13, 14 and 14, respectively 'with the adhesives 4 in the trays 3w, as is apparent from Figs. 1, 2.

The first to fourth embodiments have in common is that a U-shaped profile is used as a bordering clip 3, which corresponds to one of the number of slices of MIG unit 1 number (minus 1) of sockets 3c, 3d (ie, for example, three sockets at four Washers) for forming trays 3w is formed for receiving the discs. Obviously, both the use of spacers 8 and the use of secondary sealant 9, as shown in FIG. 11, can be dispensed with.

The heat insulating properties are thereby improved in many ways. The abandonment of the secondary sealant with a generally worse by a factor of 2 or more specific thermal conductivity as the plastic of the clamp body 30, along with the possible dimensioning of the base wall, results in a significant reduction in heat conduction without sacrificing gas tightness and / or strength, while gaining edge protection and handleability.

Another advantage in the improvement of the thermal insulation properties is made possible by the low design of the composite edge, which allows, with the same frame configuration, increased insertion depth into the frame.

FIG. 3 shows a fifth embodiment of a bordering clip 3 for use without a spacer. In Fig. 3, like reference numerals designate the same elements as in Figs. 1, 2, and their description is therefore omitted.

In contrast to the first to fourth embodiment of FIGS. 1 and 2, the edge composite clip 3 has no continuous base wall 3e, but each of the trays 3w is provided with a separate portion 3e 'of the base wall as the bottom. This permits the formation of recesses 3ca or a cavity 3dh enclosed by a wall 3e "in the pedestals 3c and 3d, respectively, In Fig. 3 a further modification of the application of a molecular sieve / drying means 5 (5c) is shown on the pedestal 3d The formation of recesses 3ca and / or hollow chambers 3dh with base wall portions 3e "having a reduced height provides a further improvement in heat insulating properties.

Of course, the fifth embodiment shown in Fig. 3 can also be modified according to the first, second and fourth embodiment of Figs. 1 and 2 with respect to the diffusion barrier layer. This means that a diffusion barrier layer could extend over the outside in accordance with the diffusion barrier 11 and the diffusion barrier could also run in the clamp body corresponding to the diffusion barriers 13 or 14, 14 '.

Furthermore, although not shown in FIGS. 1 to 3, it is preferred that functional elements (see also FIG. Be formed for fittings or fasteners such as protrusions for curling or the like.

The edge joint clip 3 may e.g. by extrusion of the clamp body 30 and by gluing, laminating or the like. the diffusion barrier layer 11, 12, 13, 14, 14 'or e.g. by coextruding staple body 30 and diffusion barrier layer 1 1, 12, 13, 14, 14 '.

Embodiments will now be described, with reference to FIGS. 4 through 8, in which the edge seal is made using a marginal composite clip 3 and spacers 8 but, with the exception of FIG. 8, without secondary sealant. In Figs. 4 to 8, corresponding elements are denoted by the same reference numerals as in Figs. 1 to 3, and the description thereof will be omitted, that is, Figs. Reference is made to the corresponding description of the elements to Figs. 1 to 3. This refers in particular to all parts of the description with regard to materials and dimensions of the diffusion barriers and of the clamp body and their components, where applicable.

In the sixth embodiment shown in Fig. 4, an edge bond in the conventional, shown in Fig. 1 1 type, by means of spacers 8 conventional type (with or without diffusion barrier) prepared by these by means of primary sealant / adhesive 4 as butyl adhesive with the discs with the formation of interspaces 7, but without secondary sealant and therefore with spacers 8 located correspondingly further outward from the edge of the pane. The spacers 8 can be conventionally bent in the corner areas or assembled with connection of corner connectors. In a conventional manner, drying agent 5 may be provided in the cavities of the spacers 8.

In the embodiment shown in FIG. 4, instead of using secondary sealant 9 (see FIG. 11), a U-shaped bracket 3 is provided which, as in FIGS. 1 to 3, has first and second side walls 3a and a base wall 3e. The side walls 3a, 3b may optionally be provided with projections 3v. In the sixth embodiment shown in FIG. 4, the spacers 8 have diffusion barrier layers in a conventional manner, so that the combination of diffusion barrier layer of the spacer 8 and adhesive 4 which seals the intermediate gap to the pane 2 adjacent to the diffusion barrier of the spacer 8 Gaps 7 gas-tight in the sense of the above definition seals. The mechanical strength of the edge bond is produced via the clamp 30.

Preferably, the bracket 3 on the base wall 3e in the height direction y projecting projections 3z, which serve to position the one or more non-external discs 2b of the MIG unit. This can be seen in the two enlarged views in Fig. 4 bottom right.

In a modification of the sixth embodiment, the spacers 8 have no diffusion barrier layers but the diffusion barrier layer is integrated in the edge composite clip 3 in the manner described for the first or third embodiment. This means that there is one of the mutually facing outer sides 3aw, 3bw of the side walls 3a, 3b continuously formed over the entire outer side of the diffusion barrier layer 1 of FIG. 1, 2 corresponding layer 1 1, so that in conjunction with the used on these walls Adhesive 4 is a gas diffusion-tight diffusion barrier is obtained. Alternatively, this can of course also be achieved with a diffusion barrier 13 corresponding to the diffusion barrier 13 from FIG. 1, running on the inside of the U-shape or in the clamp body 30.

In Fig. 5, a seventh embodiment is shown. The seventh embodiment differs from the sixth embodiment in that sockets 3 c, 3 d are provided whose positioning corresponds to the first and second sockets 3 c, 3d of the first to fifth embodiments. In contrast to the first to fifth embodiments, the pedestals have a lower height than the two side walls 3a, 3b. In the embodiment shown in FIG. 5, in turn, the spacers 8 shown only schematically have the diffusion barrier layer which, in turn, in conjunction with the corresponding adhesive 4 between the discs 2 and the spacers 8 ensure the gas-diffusion-tight sealing of the interpane spaces 7, while the clamp 3 for the mechanical strength ensures. In corresponding modifications of the seventh embodiment, all the features of the diffusion barriers 1 1, 12, 13, 14, 14 'can be used in the manner described with reference to FIGS. 1 to 3. As indicated by the broken line in FIG. 5, the modifications such as recesses and cavities shown in FIG. 3 may also be used. Furthermore, 5 function elements are schematically indicated on the underside of the base wall 3e in Fig., For example, fasteners, fittings for fitting elements, fasteners for curling or the like.

In the eighth embodiment shown in Fig. 6, the clip 3 is again adapted for the use of spacers. Here, a modified form of spacers 8h is used, which, in cross-section perpendicular to the longitudinal direction z, have a "hat shape", wherein the hat brim 8hk in the transverse direction x relative to the width of the part of the spacer 8h, between the discs 2a, 2b and 2c is protruding. This ensures that the discs get up at the bottom in the vertical direction y on the projections / brims 8hk. This improves the mounting possibilities before insertion into the bracket 3. The bracket 3 has, adjacent to the side walls 3a, 3b, on the base wall 3e projections 3 h, whose height corresponds to the height of the projections / brims 8hk of the spacer 8h. Alternatively, the widths of the brims 8hk may be chosen to correspond to exactly half the thickness of the disk so that no space 8hz remains between adjacent spacers 8h or less.

The eighth embodiment shown in Fig. 6 may in turn comprise the diffusion barrier either by providing respective diffusion barriers in the spacer 8h or by providing respective diffusion barrier layers according to the first or third embodiment, i. corresponding to the diffusion barrier layers 1 1 or 13, have.

The ninth embodiment of the marginal composite clip 3 shown in FIG. 7 is adapted for the use of U-shaped spacers 8u. In this case, the base 3c, d in the transverse direction x widths, which are adapted so that in the assembled state between the discs 2a, 2b, 2c, the legs of the U-shaped spacers 8u in addition to the adhesive 4 fit. That is, the widths are reduced as compared with the first to fifth and seventh embodiments. The pedestals 3c, 3d may in turn have different shapes, including the provision of air chambers or cavities as shown in FIG. Again, it is apparent from the shape of the edge joint clip 3 in Fig. 7 that all the different diffusion barrier layers 1 1, 12, 13, 14, 14 'as described in the first to fifth embodiments and the corresponding modifications of the projections and the base wall 3e , also in the ninth embodiment can be applied. Alternatively, the variant is also possible that the spacers 8u have diffusion barrier layers and, in conjunction with the adhesives 4, not shown, between the spacers 8u and the discs 2a, 2b, 2c give the diffusion barrier.

The tenth embodiment shown in Fig. 8 uses the spacer of the seventh embodiment in conjunction with a part of Fig. 1 1 corresponding edge connection. In the embodiment shown in Fig. 8, unlike all other embodiments, no significant reduction in the height at which the spacer 8 is located between the glass sheets 2a, 2b, 2c is achieved, but the strength of the secondary sealant 9 is exceeded the introduction of the base 3c, d (instead of secondary sealant 9) significantly reduced. Obviously, the embodiment shown in Fig. 8 does not require diffusion barriers in the edge joint clip 3 if the spacers 8 have the diffusion barriers. When using spacers 8 without diffusion barriers, all embodiments of the diffusion barriers 1 1, 12, 13, 14, 14 'described in the first to fifth embodiments could also be used in the tenth embodiment shown in FIG. 8.

In all embodiments, the thermal expansion coefficient of the edge composite clip 3 is preferably adapted to the thermal expansion coefficient of the disks 2. Glass has, for example, while, for example polypropylene has a coefficient of thermal expansion of about 7.6 x 10 ^"6 1 / K higher by a factor of 10 or more thermal expansion coefficient at room temperature. Preferably, the material from which the clip main body 30 is formed to, but a This can be achieved, for example, by adding glass fibers in an appropriate amount as a filler to the plastic, such as polypropylene Another possibility is to use a stainless steel sheet whose extension is parallel to the disc 2 (zy plane) ), or extrude into the sidewalls 3a, 3b, or apply to the outside of the sidewalls 3a, b, but instead of a sheet of stainless steel or other metal sheet, a glass fiber mat could be extruded or applied externally, all of which alter thermal expansion and conform to that of FIG Glass pane on.

In Fig. 9 is an enlarged view of a portion of the illustration of the eighth embodiment in Fig. 6 is shown. In Fig. 9 is the variant of the eighth embodiment with a diffusion barrier layer 13 corresponding to the diffusion barrier layer 13 of FIG. 1 and the protrusions 3v. In the eighth embodiment, the bracket 3 is adapted for the use of spacers. A modified form of spacers 8h is used which, in cross-section perpendicular to the longitudinal direction z, have a "hat shape", the hat brim 8hk in the transverse direction x opposite the width bl of the part of the spacer 8h which is located between the discs 2a, 2b. 2c is protruding. This ensures that the discs can get up at the bottom in the vertical direction y on the projections / brims 8hk. The bracket 3 has, adjacent to the side walls 3a, 3b, on the base wall 3e, the projections 3h, whose height hh the height hk of the projections / brims 8hk of the spacer 8h corresponds. If a layer of the adhesive 4 or other adhesive is to be provided between the base wall 3e and the spacer 8h (see Fig. 9), the height hk is set slightly smaller than the height hh, corresponding to the intended height h6 of the adhesive layer.

The adhesive 4 is provided in a customary manner between the disks 2 adjoining the spacer 8h and the side walls 8b, 8r of the spacer 8h with a thickness d4. In Fig. 9, the brims 8hk have widths bk in the transverse direction x, which correspond to exactly half of the disk thickness d2. This leaves virtually no white space 8hz between adjacent spacers 8h, except for a distance of 2 times the adhesive thickness d4. The width bk can therefore be chosen such that it corresponds to half the thickness of the pane plus the adhesive thickness d4 (hk = d2 / 2 + d4) if the spacer armrests 8hk of adjacent spacers 8h are to abut one another.

The brim hk can also be provided only on one side of the modified spacer 8h. Then, the width of the brim 8hk can also be significantly greater than half the thickness of the pane, e.g. be selected equal to the disk thickness. Even then adjacent spacers can abut each other, if necessary, while balancing the adhesive thickness d4 on both sides, that is with a width hk = d2 + 2d4.

Fig. 10 shows spacers 8h according to an eleventh embodiment in 6 modifications in a) to f). The spacers 8h are shown schematically. In Fig. 10 a), a spacer 8h of the type shown in Figs. 6 and 9 is shown in greater detail. The spacer (spacer) 8h extends in the longitudinal direction z with a constant cross section (xy) perpendicular to the longitudinal direction z. The spacer 8h has a body made of a material having a specific thermal conductivity <0.36 W / (mK), preferably <0.3 W / (mK) such as polyamide (PA), eg PA66GF25, or a corresponding polyolefin, preferably Polypropylene (PP) or the like having thermal conductivities in the range of 0.2 W / (mK) and less. Normally, a spacer is described starting from the side facing the space between the panes 7. Then the body has a base wall 8o, shown hereinabove, a top wall 8b opposite the base wall at a distance h8, shown herebelow, 2 spaced side walls 81 and 8r substantially parallel to each other and perpendicular to the base wall 8o and the upper wall 8b and connecting to, so that a cavity / chamber 8k defined and enclosed in cross section. The base wall is gas-permeable, formed for example by perforations 8q in the base wall 8o. As a result, the space between the panes and the chamber, into which a molecular sieve / drying agent is usually filled, can communicate. As far as the Spacer 8h does not differ from a conventional spacer. In the spacer 8h of Fig. 10a) but projections are provided on both lateral sides, which look like Hutkrempen in cross-section, ie, Krempen (flange projections, planar projections with flat, parallel upper and lower sides) 8hk with a height hk, the Thickness db of the upper wall 8b but correspond to a flange 8. The brims 8hk have a width bk in the transverse direction x.

In the variant of the spacer 8h shown in FIG. 10a), a diffusion barrier layer 8ds is provided which, beginning at the outside of one side wall 81, follows the outside of the body of the spacer 8h via the brim 8hk adjoining the one side wall 81 and further over the Outside of the upper wall 8b extends to the other side wall 8r adjacent brim 8hk to the other side wall 8r continuously. With such a diffusion barrier layer 8ds on the spacer 8h, the diffusion barrier layer 13 shown in the variant in FIG. 9 is unnecessary. The spacer 8h for the variant of an edge bond shown in FIG. 9 therefore does not have the diffusion barrier layer 8ds. The possibility of providing a diffusion barrier layer 8ds and / or the possibility of gas permeable formation of the base wall 8o are optional for all other modifications, although not shown everywhere in Figs. 10b) to 10f). As can be seen in FIGS. 10b) to 10f), the height of the brims 8hk can be varied depending on the requirements. In particular, it does not have to be equal to the wall thickness of the chamber walls (see Fig. 10a) to c)). The width bk of the brims can be varied depending on the requirements (see FIGS. 10a) to c). The base wall 8o may be concave (with respect to the chamber 8k) to improve the bending behavior. The brim hk may be provided only on one side of the spacer 8h (see FIG. 10e)). A known spacer such as, for example, a spacer 8hw known from WO 2006/027146 A1 can be reconfigured by extruding a plate 8p into a spacer 8h having a hat shape with a brim. For the choice of material and the material thicknesses for the spacers 8h, reference is made to WO 2006/027146 A1, pages 6, 7, the relevant teaching of which can be applied to the spacers 8h.

It is explicitly pointed out that all features disclosed in the description and / or the claims are considered separate and independent of each other for the purpose of original disclosure as well as for the purpose of limiting the claimed invention independently of the feature combinations in the embodiments and / or the claims should. It is explicitly stated that all ranges or indications of groups of units disclose every possible intermediate value or subset of units for the purpose of original disclosure as well as for the purpose of limiting the claimed invention, in particular as a limit of range disclosure.

Claims

claims

An edge composite clip, which extends in a longitudinal direction (z) with a, seen in cross section (x-y) perpendicular to the longitudinal direction, constant cross-section, for an insulating glass unit, with

a substantially U-shaped bracket body (30) of a first material having a specific thermal conductivity <0.3 W / (mK), which has at least one base (3c, 3d), and in which by the at least one base (3c, 3d) and a first side wall (3a) and a second side wall (3b) which form the legs of the U-shape, at least two trays (3w) for receiving adhesive (4) and panes (2a, 2b, 2c) of an insulating glass unit be defined, and

a gas diffusion-tight diffusion barrier layer (1 1, 13, 14, 14 ') formed on or in the clamp body (30),

wherein the diffusion barrier layer (1 1, 13, 14, 14 '), starting from the inner walls (3e, 3we, 3wa, 3wb, 3wc, 3wd) of the troughs (3w) continuously between two trays (3w) either along the outside of the U Form (1 1) of the staple body (30) or by (13, 14, 14 ') the staple body (30).

2. edge composite clip according to claim 1, wherein

the troughs (3w) defined by the first and second side walls (3a, 3b) and the at least one base (3c, 3d) are tapered in the height direction and / or by the upper edges of the first and second side walls (3a, 3b ) and the at least one base (3c, 3d) provided projections (3v) are formed narrowed.

3. edge composite clip according to claim 1 or 2, wherein

the diffusion barrier layer (14, 14 ') runs continuously through the clamp body (30), starting from the inner walls (3e, 3we, 3wa, 3wb, 3wc, 3wd) of two adjacent tubs (3a).

4. edge composite clip according to one of claims 1 to 3, wherein

the diffusion barrier layer (14, 14 ') runs continuously through the clamp body (30) starting from the bottom walls (3we, 3e) of two adjacent troughs (3w).

5. edge composite clip according to one of claims 1 to 3, wherein

the diffusion barrier layer (14) runs continuously through the base (3c, 3d) starting from the mutually opposite outer sides (3cw, 3dw) of the base (3c, 3d).

6. Edge composite clip according to claim 1 or 2, wherein

the diffusion barrier layer (1 1, 13) extending from the facing inner sides of the two legs continuously either along the outside of the U-shape of the clamp body (30) or through the clamp body (30).

7. Edge composite clip according to one of claims 1 to 6, wherein

Functional elements (3f) are provided on the outside of the U-shape and / or in the recesses (3ca) and / or cavities (3dh) on the outside of the U-shape and / or in the clamp body (30) are provided.

8. edge bond of an insulating glass unit with an edge composite clip according to one of claims 1 to 7, wherein

a gas-diffusion-proof adhesive (4) is formed adjacent to and contiguous to the gas-diffusion-tight diffusion barrier layer (11, 13, 14, 14 ') for forming a gas diffusion barrier.

9. edge bond of an insulating glass unit with a marginal composite clip which extends in a longitudinal direction (z) with a cross-section (xy) perpendicular to the longitudinal direction seen constant cross-section, for an insulating glass unit, with a substantially U-shaped bracket body (30) from a first material with a specific thermal conductivity <0.3 W / (mK), in which

Spacer (8, 8h, 8u) are provided with diffusion barrier layers, and

a gas diffusion-proof adhesive (4) is provided adjacent to the diffusion barrier layers of the spacers (8, 8h, 8u) such that a gas diffusion barrier is formed.

10. Insulating glass unit with

two or more discs (2, 2a, 2b, 2c) arranged in parallel with each other to form one or more disc spaces (7) therebetween, and an edge seal according to one of claims 8 or 9, which is arranged such that the diffusion barrier closes the disc or the interstices (7) gas-diffusion-tight.

A spacer (8h) for an insulating glass unit comprising at least two parallel disks (2, 2a, 2b, 2c) extending in a longitudinal direction (z) of constant cross section (xy) perpendicular to the longitudinal direction z) and one A body having a top wall (8b) and two parallel side walls (81, 8r) for engaging the discs (2, 2a, 2b, 2c) perpendicular to the top wall (8b) in a height direction (y) perpendicular to the longitudinal direction, extend,

wherein the at least one planar projection (8hk) extending from one side wall (81, 8r) in a transverse direction (x) perpendicular to the height direction (y) and the longitudinal direction (z) is outwardly away from the other side wall extends, is formed.

12. Spacer (8h) according to claim 1 1, wherein on both side walls each have a planar projection (8hk) extending from the respective side wall (81, 8r) in the transverse direction (x) outwardly away from the respective other side wall , is trained.

13. Spacer (8h) according to claim 1 1 or 12, wherein a diffusion barrier layer (8ds) is provided.

14. Spacer (8h) according to any one of claims 1 1 to 13, wherein one of the upper wall (8b) opposite the base wall (8o) is concave.

15. Spacer (8h) according to any one of claims 1 1 to 14, wherein a chamber (8k) is designed for receiving desiccant.