DE102004020884A1 - Insulated glass panel comprises a section containing a drying agent arranged at a distance from the base and bridging the gap between the sides which extend from the base - Google Patents

Abstract

Insulated glass panel comprises a section (18) containing a drying agent arranged at a distance from the base (5) and bridging the gap between the sides (11) which extend from the base. Preferred Features: The sides have an extension (36) which extends over the whole periphery of a frame-like spacer (4). The section containing the drying agent adheres to the side of the extension facing away from the base. The sides are connected to each other in one piece only over the base.

Description

The invention relates to an insulating glass pane with the features specified in the preamble of claim 1. Such an insulating glass pane is for example from DE 28 16 437 C2 known.

In known insulating glass panes, two individual glass panes are glued together by a frame-shaped spacer. The spacers are usually made of metallic hollow sections, in particular of aluminum or steel, which have the individual glass panes facing legs. It is known to apply to the legs of the frame-shaped spacer a primary, non-setting sealing compound, which is usually a polyisobutylene, that is a thermoplastic butyl rubber. From the DE 28 03 132 C2 it is known. to place the spacer for coating with the primary sealing compound on a horizontal conveyor, to lean against a support wall and pass with his leg lying on the horizontal conveyor between two facing nozzles, with which a strand of the primary sealant is applied to both legs of the spacer. If a corner of the spacer between the nozzles, the feed is interrupted and the spacer is rotated counter to its feed direction by 90 °, whereby the next leg of the frame-shaped spacer comes to rest on the horizontal conveyor, which is then coated next. So you continue until the entire spacer is coated on his thighs. A spacer prepared in this way is then glued onto a first glass pane in a first assembly station and in another assembly station a second glass pane is glued onto the still free leg of the spacer and the assembly thus formed is pressed in a surface press to a thickness predetermined for the insulating glass pane.

The primary sealant serves not only to seal the insulating glass panel against the ingress of moisture or, if the insulating glass pane has been filled with a gas other than air, against the loss of the gas other than air. The primary sealing compound also acts as a mounting aid for a provisional cohesion of the insulating glass pane, which is subsequently permanently secured in the prior art by a secondary sealing compound. In the known insulating glass panes, the secondary sealing compound is filled in an edge joint, which is bounded by the outside of the spacer and the two adjacent glass panes. The vast majority of the secondary sealing compound is accordingly on the outside of the spacer between the two individual glass panes and possibly a smaller part thereof penetrates into the two gaps between the two legs of the spacer and the glass panes, where it meets the primary sealing compound and on this connects. From the US 5,439,716 A It is known to provide both the primary and the secondary sealing compound only between the legs of a spacer, which is formed from a hollow profile made of steel, and the adjacent glass sheets.

It is known as secondary Sealant a hardening Plastic compound to use, which is a rigid bond between produces the two individual glass panes. In insulating glass panes are considered secondary Sealants Thiokole and polyurethanes in use.

Around the production costs for To reduce an insulating glass pane, it is known instead of Spacers, which are formed from hollow profiled bars, a solid thermoplastic spacer to be used in situ by means of a nozzle, which is moved along the edge of a single pane of glass extruded the glass sheet and then by setting a second Glass pane is glued to this. The in situ extruded spacer takes over the task of a primary Sealing compound. To the solid bond between the individual Permanently securing glass panes of the insulating glass pane is required also in this case a secondary one Sealing compound, which is filled in the edge joint, which on the outside consists of the thermoplastic spacer and from one to to the other glass pane is enough.

An insulating glass pane, which is formed by the fact that glass panes are glued together with the interposition of a spacer on the edge, require a desiccant, which binds moisture present in the interior of the insulating glass, so that the dew point is not undershot on the inside of the glass panes when cooling. It is known to provide the desiccant in the spacer. If, as in the prior art, the spacer is formed from one or more hollow profile rods, these usually contain the desiccant in the form of a loosely filled granulate (US Pat. US 5,439,716 A ), which communicates via a perforation of the inside of the spacer with the interior of the insulating glass pane.

From the US Pat. No. 6,470,561 B1 is an insulating glass pane with a spacer known, which is formed of a U-shaped steel profile whose base is directed outwards and whose legs are directed into the interior of the insulating glass pane. Such an Ab Standhalter has no cavity for receiving a desiccant; this is instead stored in a gas-permeable strand, for example made of polyurethane, which adheres self-adhesive on the inside of the base of the U-profile. Such a spacer can be made with curved corners cheaper than a spacer made of metallic hollow profiles, which are filled with loose desiccant. However, they are more unstable than spacers made of curved hollow profile bars and are therefore only suitable for small-sized insulating glass panes. Insulating glass panes made with it are known under the trade name Intercept. They also look less appealing than conventional insulating glass panes.

Of the present invention is based on the object, another possibility To show how to do it without limitations in quality and dimensions at cheap, especially for the mass production, suitable insulating glass panes can come.

These Task is solved by an insulating glass pane with the specified in claim 1 Features. The requirements FIGS. 40 and 42 provide methods of making such an insulating glass pane at. Advantageous developments of the invention are the subject of Dependent claims.

• • Die Schenkel des Abstandhalters sind nur an der Basis des Abstandhalters einstückig miteinander verbunden. Das ist günstig für einen geringen Wärmeübergang zwischen den einzelnen Glasscheiben.
• • Der Strang, welcher ein Trockenmittel enthält, wird nicht auf die Basis aufgetragen, sondern als Brücke zwischen den Schenkeln in einem Abstand von der Basis. Das bedeutet, dass zwischen der Basis und dem Strang ein Freiraum verbleibt, welcher für einen niedrigen Wärmeübergang zwischen den einzelnen Glasscheiben günstig ist.
• • Der von dem Strang mit dem Trockenmittel abgeschlossene Freiraum kann einen Beitrag zur Abdichtung der Isolierglasscheibe liefern. Wasserdampf, welcher aus irgendeinem Grund, zum Beispiel infolge einer Porosität, eines Risses oder infolge von Korrosion des Abstandhalters diesen durchwandert, gelangt in den vom Strang abgeschlossenen Freiraum, wird dort zurückgehalten und schließlich vom Trockenmittel absorbiert, so dass er den Innenraum der Isolierglasscheibe nicht erreicht.
• • Die Erfindung ermöglicht eine doppelte Barriere gegen das Eindringen von Wasserdampf, welche eine gemäß der US 6,470,561 B1 auf die Basis des Abstandhalters aufgetragene poröse trockenmittelhaltige Masse schon deshalb nicht bietet, weil dort die Feuchtigkeit um die trockenmittelhaltige Masse herum wandern oder über die Schenkel eindringen kann.
• • Der vorgenannte Vorteil wird noch wesentlich verstärkt, wenn man den Strang nicht aus einem porösen Material, sondern aus einem dichten Material bildet, zum Beispiel aus einem Material auf der Grundlage von Polyisobutylen. In diesem Fall wirkt der Strang nicht nur als Absorber, sondern auch als Dichtung. Trotzdem kann er seine Aufgabe erfüllen, Feuchtigkeit aus dem Innenraum der Isolierglasscheibe zu binden, weil dafür lange Diffusionszeiten ohne Nachteil in Kauf genommen werden können.
• • Der im Abstandhalter gebildete Freiraum hat den weiteren Vorteil, dass der Abstandhalter mit dem Material, welches das Trockenmittel enthält, gut angefüllt erscheint, obwohl der im Abstandhalter zur Verfügung stehende Raum nur teilweise ausgefüllt ist.
• • Daraus ergibt sich der weitere Vorteil, dass das ansprechende Erscheinungsbild des Abstandhalters in der Isolierglasscheibe mit einem Minimum an Material, welches ein Trockenmittel enthält, erreicht werden kann.
• • Der Strang läßt sich in situ auf die Schenkel extrudieren.
• • Schwankungen im Durchsatz des Materials durch eine Düse, mit welcher das Material extrudiert wird, in welchem ein Trockenmittel enthalten ist, können dadurch ausgeglichen werden, dass die Düse die Oberfläche des Stranges definiert glättet und gegebenenfalls vorhandenes überschüssiges Material in den Zwischenraum zwischen den Schenkeln verdrängt, so dass sich auch bei Dosierungenauigkeiten eine gleichmäßig glatte Oberfläche des Stranges ergibt.
• • Die Erfindung eignet sich für unterschiedliche Abstandhalter, insbesondere für solche aus extrudierten Kunststoffprofilen.

In an insulating glass pane according to the invention, two individual glass panes are glued together by a frame-shaped spacer. The spacer has a base and two legs extending from the base, which are integrally connected only via the base. Over the base, there is a gap between the legs which is bridged by a strand containing a desiccant which extends at a distance from the base best over the full length of the legs and is glued thereto. This has significant advantages, which work together meaningfully:

• • The legs of the spacer are integrally connected only at the base of the spacer. This is favorable for a low heat transfer between the individual glass panes.
• • The strand containing a desiccant is not applied to the base but as a bridge between the legs at a distance from the base. This means that between the base and the strand remains a free space, which is favorable for a low heat transfer between the individual glass panes.
• • The space enclosed by the strand with the desiccant can contribute to the sealing of the insulating glass pane. Water vapor, which for some reason, for example as a result of porosity, cracking or corrosion of the spacer passes through it, enters the space enclosed by the strand, is retained there and finally absorbed by the desiccant so that it does not reach the interior of the insulating glass pane ,
• The invention enables a double barrier against the penetration of water vapor, which is one according to the US Pat. No. 6,470,561 B1 For this reason, the porous desiccant-containing composition applied to the base of the spacer does not offer it because the moisture can migrate around the desiccant-containing composition or penetrate over the legs.
• • The aforementioned advantage is even more enhanced if the strand is not formed of a porous material but of a dense material, for example of a material based on polyisobutylene. In this case, the strand acts not only as an absorber, but also as a seal. Nevertheless, he can fulfill his task to bind moisture from the interior of the insulating glass, because long diffusion times can be taken without disadvantage in purchasing.
• • The clearance formed in the spacer has the further advantage that the spacer appears well filled with the material containing the desiccant, although the space available in the spacer is only partially filled.
• • This results in the further advantage that the attractive appearance of the spacer in the insulating glass pane can be achieved with a minimum of material containing a desiccant.
• • The strand can be extruded in situ onto the thighs.
• Variations in the flow rate of the material through a die extruding the material in which a desiccant is contained may be compensated for by the nozzle defining the surface of the strand as defined and displacing any excess material present in the gap between the legs , so that results in evenly dosing inaccuracies a smooth surface of the strand.
• The invention is suitable for different spacers, in particular for those made of extruded plastic profiles.

The bridging of the legs of the spacer by the strand is facilitated if at least one of the legs has a projection spaced from the base, which extends into the space between the legs, the Gap between them narrows and at the same time offers a surface which is particularly suitable for applying the strand. Such an extension stabilizes the position of the strand. The strand containing the desiccant may penetrate into the gap between the limbs narrowed by the at least one extension and result in mechanical interlocking between the at least one extension and the strand, which also secures the strand's position when the adhesive adhesion of the strand should be insufficient or inadequate.

Preferably you use spacers, which on both legs over the Length extending Extension have and the two extensions directed against each other are. This is for the production and coating of the spacer most favorable.

Preferably rejuvenate The outgoing from the thighs extensions in the direction of the opposite Leg. It is particularly preferred that the extensions are pointed run. This allows the cost of materials for the spacer, which is preferably a plastic profile, minimize the under the extensions maximize remaining clearance and heat transfer between each Minimize glass panes. Furthermore tapered extensions are particularly well suited for a gearing of the extensions with the strand in which a desiccant is incorporated.

Of the Strand in which a desiccant is incorporated has been preferred a convex top. He could about the remote from the base ends of the legs of the spacer protrude. Preferably, the strand should be with the desiccant but not over the ends of the legs of the spacer in the space between the protrude individual glass panes. Rather, it is preferred that the remote from the respective leg free end of the respective Fortsatzes is below a level, which the two far from the base lying ends of the two legs of the spacer limited. Preferably, the extensions are overall below the mentioned level. You can do that, for example in that the extensions of one in the middle Area of the thighs located point and go out on the shortest Ways opposite Approach legs, or by the fact that they from the ends of the legs, which of the base are gone, go out, but the opposite Approach the thighs and at the same time the base.

Preferably lie the extensions facing each other by far. This helps to save material and the thermal bridge between the individual To reduce glass panes. It is, however, also in particular at tapered extensions possible, that the extensions touch, without one piece to merge into each other.

Preferably are the extensions with regard to one the base of the spacer intersecting longitudinally extending symmetry plane formed mirror-symmetrically. This is the cheapest for the production.

Of the Spacer itself is preferably made of an extruded plastic profile produced; That's the way to go the spacer profile with his two thighs and the one of them outgoing extensions, which carry the strand with the desiccant, produce particularly favorable.

The strand can be dyed to the customer's request. It is preferably made of a plastic which is only so slightly permeable to water vapor, that the moisture present in the interior of the insulating glass pane can actually be absorbed by the desiccant. Preferably, the strand of a pasty plastic, in which a desiccant is dispersed, extruded directly onto the extension or extensions, where it cools, glued to the spacer and bridges the gap between the legs. Such a strand can be extruded simultaneously or overlapping in time in the same station in which a primary and optionally a secondary sealing compound are applied to the legs of the spacer profile. As a material for the strand is particularly suitable a thermoplastic adhesive, in particular based on polyisobutylene, for example, a material which is also used for thermoplastic spacers in insulating glass and processed under the brand TPS ^® on machines of Lenhardt Maschinenbau GmbH (WO96 / 06456 A2).

For producing an insulating glass pane according to the invention, it is preferable to proceed by first providing a profile bar from which a frame-shaped spacer is formed. On the straight profile bar is applied to the formation of the desiccant-containing strand on a pasty, adhesive mass containing the desiccant. The mass is for example applied to the side of the legs of the profile bar facing away from the base of the profiled bar, in particular to the at least one extension, which preferably has a leg of the profiled bar, in order to obtain a surface which is particularly suitable for applying the pasty mass. At the same time or overlapping in time, a primary sealing compound, in particular a polyisobutylene, is applied to the outer sides of the two legs. Then the profile bar is formed into a frame-shaped structure and closed. This can be done by joining four straight profile bars with corner connectors to the frame-shaped structure. Preferably, however, the frame is formed from a single profile bar which receives curved corners for this purpose. If necessary, machining operations at the corners provided at the corners and at the ends of the profiled bars are carried out before applying the desiccant-containing mass and the primary sealing compound. The coated spacer is attached to a first glass sheet and glued to it. Then, a second glass pane is attached to the spacer parallel to the first glass sheet and glued to it. The semi-finished insulating glass pane formed in this way is pressed to its predetermined thickness. Finally, the spacer is still connected by applying a secondary, hardening sealing compound with the two glass panes to obtain a mechanically strong composite of the insulating glass pane. The secondary sealant may extend across the entire base of the spacer from one glass to the other, but may be limited to a gap between the outside of the two legs of the spacer and the adjacent sheets of glass. In the latter case, the secondary sealing compound can already be applied at the same time or overlapping in time with the primary sealing compound on the still straight, not yet closed to the frame profile bar.

at Use of a primary Sealant, which both a sufficient seal as also a sufficiently strong mechanical bond of the insulating glass pane causes a separate secondary sealing compound can be omitted; such a primary Sealant may be, for example, a reactive hot melt be a hot melt adhesive with a through heat curable Component. With a single sealant you can get along if these have sufficient sealing properties in their properties a sufficient strength connects. She should be successful set the strength and harden and at the same time maintain a certain permanent elasticity to the required Effect seal.

The However, invention is not dependent on just one type of Sealant to work. For a long life of Insulating glass panes is the use of two sealants Cheap, which complement each other in their properties: a primary sealant, the like a polyisobutylene a special suitability for sealing has, and a secondary Sealant which has a particular suitability for permanent firm bonding of the glass has, in particular a hardening plastic mass, such as a polyurethane or a thiokol (polysulfide), a reactive polyisobutylene (butyl), a silicone or even a Hot-melt.

Both the primary sealant and the secondary sealant may be applied to the outside legs of the spacer prior to assembling the insulating glass panel. This can be done simultaneously, for example by coextrusion, or sequentially or temporally overlapping, preferably first the primary sealant and then the secondary sealant. Conveniently, the primary sealing compound adjoins the interior of the insulating glass pane and the secondary sealing compound directly to the side facing away from the interior of the insulating glass side of the primary sealing compound and extends to the edge of the insulating glass pane. In this case, the primary sealing compound, which is preferably applied in front of the secondary sealing compound, constitutes an effective barrier for the secondary sealing compound. This barrier can not be overcome by the second sealing compound during the pressing of the insulating glass pane. Thus, one for the tightness and cohesion of the insulating glass pane advantageously two-stage composite is achieved. Both sealing compounds are preferably applied in one and the same station, so that a separate sealing station, in which the secondary sealing compound is processed in the prior art ( DE 28 16 437 C2 ), can be omitted. Since the sealing stations are generally the most expensive stations in an insulating glass production line, this means an enormous cost savings with significantly less space.

The primary sealant and secondary sealant may already be applied to the legs of the profile bars before they are formed into a spacer frame. A device like that in the DE 28 03 132 C2 is described for moving and pivoting spacer frame during the coating of the legs with a primary sealing compound is not required in such a way of producing an insulating glass pane.

The Invention is not only suitable for insulating glass, in which two individual glass panes through a frame-shaped spacer with each other are glued, but also for Insulating glass panes, in which more than two glass panes each in pairs by a frame-shaped Spacers are glued together, especially for insulating glass panes, in which three individual panes of glass by two frame-shaped spacers glued together.

Preferably the spacer is arranged so that it is flush with the edges of the completes individual glass panes. For graded insulating glass panes, which consist of a larger and a smaller pane of glass, the spacer closes accordingly preferably flush off with the edge of the smaller glass pane. A flush seal allows the greatest seal depth and reduces both the risk of chipping from the edge of the Insulating glass pane, as well as their contamination by possibly overflowing Sealing compound. The spacer may even be arranged that he over protrudes the edge of the individual glass panes and thereby itself forms the edge of the insulating glass pane. This additionally reduces the Risk of chipping from the edge of the insulating glass pane, in particular during transport and installation of the insulating glass pane in a window frame or in a facade.

Optimum protection of the edges of the glass sheets is achieved with an embodiment in which the spacer has a base with two extensions extending beyond the legs of the spacer in opposite directions which cover and preferably abut the edges of the individual sheets of glass. The edges of the glass panes are then completely protected and whenever the insulating glass pane is placed, it stands on the base of the spacer and its extensions. These extensions preferably extend uninterruptedly in the longitudinal direction of the spacer profile, but could also be interrupted without a major loss of protective effect. This embodiment considerably facilitates the handling of freshly produced insulating glass panes:
Since no obstructive sealing compound protrudes on the edge of the insulating glass pane, but is hidden between the edge of the glass panes and the lateral extensions of the spacer, the insulating glass can be unstacked ready for shipment or used directly in window frames, without having to wait for the hardening of the sealant.

When Spacers are suitable for those made of profiled bars Metal or plastic are formed. Especially with spacers, which are made of plastic, it is preferable that they have a base which is 2 mm to 5 mm thick, in particular 2.5 mm to 4 mm. Such a base, which is significantly thicker than with spacers In the prior art, is not only cheap, because it is the gas-tightness and water vapor resistance of the insulating glass improves, but also because it increases the mechanical stability of the spacer, the Forming corners in the spacer without the use of separate corner connectors favors, as in the German patent application filed by the same applicant 10 2004 005 354.5, and the joining of profiled bars for spacers, without the use of separate straight connectors, favors as in the German patent application filed by the same applicant 10 2004 005 471.1 is disclosed.

Preferably the spacer consists at least partially of a plastic For the Invention suitable plastic profiles can be inexpensively in large lengths by extrusion be formed. Plastic spacers allow a lower heat transfer from one glass pane to another glass pane as metallic Spacers. It can increase the gas tightness and Vapor-tightness of the insulating glass pane can be quite advantageous if the outside the base of the spacer is metallic. She can, for example thin metallized be what the heat transfer not significantly increased by the spacer. It is also possible through a method of coextrusion a spacer profile made of plastic to produce which on the outside its base is provided with a metal foil.

A another advantageous possibility the gas-tightness and vapor-tightness of a spacer Improve plastic, is in the base of the spacer to embed a diffusion barrier, in particular a metal foil. Such an internal diffusion barrier can according to a method coextrusion embedded in the spacer profile.

On the outside of the legs of the profile bar, a concave surface area extending in its longitudinal direction is preferably provided, on which preferably the secondary sealing compound is applied. On the side of the concave surface area facing away from the spacer, there is preferably a flat surface area on which the primary sealing compound is applied. With this flat surface area results for the primary sealing compound, which is of particular importance for the gas-tightness and vapor-tightness, a defined sealing gap of predetermined width and depth. On the other side of the concave surface area, ie in the vicinity of the outer edge of the insulating glass pane, the spacer expediently has a further planar surface area which runs parallel to the first flat surface area on which the primary sealing compound adheres. Preferably, the two planar surface areas are coplanar. This facilitates the correct alignment of the spacer when pressing the insulating glass pane. On this further flat surface area becomes the secondary seal mass is also applied or it is displaced from the concave surface area of the spacer there when the insulating glass pane is pressed.

The secondary Sealant should be in the gap between the thighs of the Spacer and the glass sheets over a depth of at least 5 mm, even better over a depth of 6mm to 8mm. Preferably, the secondary sealing compound extends over the entire height the leg of the spacer, as far as it is not covered by primary sealing compound are. Is a primary Sealant applied to the thighs closes the secondary sealant directly to these, leaving gaps preferably should be avoided. Used only with a single sealant worked, which is both the required seal and the permanent mechanical composite causes, then this should also about the entire height of the Legs of the spacer extend. A great sealing depth, without reduction of the clear internal dimension of the frame-shaped Spacer allows if any sealant only between the spacer and the two individual glass panes is provided because of the spacer then flush can be arranged with the edge of the glass sheets, favors the work with only a single sealant, in which it concerns the Example to a reactive, one-component sealant and adhesive the base of a butyl or a hot melt adhesive (hot-melt) can act. Through the use of such an adhesive and sealant as the sole sealant can be cost savings achieve in insulating glass production.

embodiments The invention are in the attached Drawings shown. Same or corresponding parts are in the various examples with matching reference numbers designated.

1 shows a cross section through part of an insulating glass pane according to the invention,

2 shows in detail a cross section through the in 1 inserted spacers,

3 shows the spacer 2 coated with a primary sealant and with an applied desiccant-containing strand,

4 shows the spacer 3 additionally coated with a secondary sealant,

5 shows the spacer 4 between two glass panes in the phase of assembly of the insulating glass pane,

6 shows a section of the insulating glass in 1 in an oblique view,

7 shows in a representation like in 4 a spacer with a modified cross-sectional shape, which is coated with only a single sealant, even without a desiccant-containing strand,

8th shows in a representation according to the 1 an insulating glass pane into which the spacer is made 7 after application of a desiccant-containing strand is used,

9 shows the insulating glass, off 8th in an oblique view,

10 shows in a representation like in 7 a third example of a spacer with a modified cross-sectional shape,

11 shows in a representation according to the 8th an insulating glass pane into which the spacer is made 10 is used,

12 shows the insulating glass pane 11 in an oblique view,

13 shows a cross section through a third embodiment of a spacer,

14 shows in a representation like in 3 the spacer after applying a strand of desiccant and a primary sealant,

15 shows in a representation according to the 1 an insulating glass pane with the spacer 14 in cross section,

16 shows the insulating glass pane 15 in an oblique view,

17 shows the insulating glass pane 15 with an inserted rung, the

18 to 22 show in representations according to the 13 to 16 an embodiment with a fourth embodiment of a spacer and the

23 to 27 show in representations according to the 13 to 16 an example with a fifth embodiment of a spacer,

28 shows in an oblique view the Be rich of a joint in a spacer, and

29 shows the connection of two profile bar ends by a wedge.

1 shows a section of an insulating glass pane 1 , consisting of two individual glass panes 2 and 3 between which is a frame-shaped spacer 4 which is as an item in 2 is shown. The spacer 4 has in cross-section derived from a C-profile profile with a base 5 which is a flat outside 6 Has. From the opposite inside 7 the base 5 go two mirror-inverted thighs 11 dating to theirs from the base 5 distant ends facing each other short projections 8th to have. The glass panes 2 and 3 facing thigh 11 of the spacer 4 have adjacent to the inside 12 of the spacer 4 a first planar surface area 13 , adjacent to the outside 6 the base 5 a second planar surface area 14 and a concave surface area in between 15 whose lowest point is at the level of the inside 7 the base 5 lies.

The spacer 4 is formed from a plastic profile bar, which can be produced by extrusion. The base 5 of the spacer 4 is preferably thicker than its legs 11 , Preferably, the base is 5 at the thinnest point 2.5 mm to 4 mm thick. The height of the spacer profile, measured from the outside 6 the base 5 to the opposite inside 12 of the spacer 4 is preferably 10 mm to 12 mm. Under the inside 12 of the spacer 4 Here is the base 5 opposite end surface of the legs 11 or legs understood which the interior 17 facing the insulating glass pane.

Between the base 5 and the short projections 8th the thigh 11 have these longitudinal extensions 36 which are directed against each other without touching each other so that there is a longitudinal gap between them 37 which is preferably narrower than the gap between the protrusions 8th , The structure of the spacer profile is symmetrical to the base 5 cutting longitudinal center plane 38 ,

The filed by the same inventor at the German Patent Office patent application 100 2004 005 747.6 discloses how such profile bars by bending a rectangular frame can be formed.

On the extensions 36 is a strand 18 containing a desiccant. For this purpose, the strand 18 be formed for example of a plastic as a matrix material in which a granular or powdery desiccant is stored. The strand 18 is preferably made of a thermoplastic material and is best immediately hot on the extensions 36 extruded, on which he adheres firmly after cooling. As part of the material penetrates into the gap 37 and interlocks there with the edges of the extensions 36 , Under the strand 18 remains in the spacer 4 a free space 39 ,

To such a spacer 4 with two glass panes 2 and 3 to connect to an insulating glass pane, is on the flat surface area 13 the two thighs 11 of the spacer 4 a strand of a primary sealant 19 applied ( 3 ), whereas on the concave surface area 15 the two thighs 11 one strand each of a secondary sealing compound 20 is applied ( 4 ). The primary sealant 19 is preferably a non-setting polyisobutylene. The secondary sealant 20 is preferably a setting polyurethane or thiokol. Preferably, the secondary sealant becomes 20 slightly offset after the primary sealant 19 applied because then the strand of the primary sealant 19 a barrier to the secondary sealant 20 forms. For this purpose, the nozzles for the two sealing compounds can be arranged one behind the other in the longitudinal direction of the profile bar forming the spacer, so that a profile bar moved past the nozzles passes first the nozzle for the primary sealing compound and then the nozzle for the secondary sealing compound. Alternatively, you can set the profile bar and move the nozzles along it. In this case, the nozzle for the primary sealant should run in front of the nozzle for the secondary sealant. So that the secondary sealant 20 Do not worry about the primary sealant 19 pushes, becomes the secondary sealant 20 preferably, as in 4 shown slightly flatter than the primary sealant 19 so that between the primary sealant 19 and the secondary sealant 20 a stepped step 21 is formed. Despite the offset between the application of the primary and secondary sealants 19 and 20 Both can be applied in one and the same device in the manner described above. At the same time in the same device, the strand 18 containing a desiccant on the appendages 36 be extruded.

Is the spacer 4 coated and the strand 18 on the extensions 36 applied as in 4 shown, he can to one of the two glass panes 2 . 3 set and then the other glass 3 . 2 to the opposite side of the Ab stand holder 4 set and the distance of the glass panes 2 . 3 be reduced by pressing to a predetermined thickness for the insulating glass pane ( 5 ). But it is also possible, as in 4 coated spacers 4 between two parallel, juxtaposed glass panes 2 . 3 insert and then against the spacer 4 to move and to press to the predetermined thickness ( 5 ). In the process, they are made from the primary sealing compound 19 and the secondary sealant 20 formed strands, a portion of the sealant displaced and fills the gap between the legs 11 and the glass panes 2 . 3 completely off, as in 1 shown. With correct dosage of the sealing compounds 19 . 20 neither swells primary sealant 19 over the inside 12 of the spacer 4 in the interior 17 the insulating glass pane 1 still secondary sealing compound swells 20 from the insulating glass pane 1 outward.

It should be noted that it is beneficial if the primary and secondary sealants 19 and 20 so on the thighs 11 be applied that the width of the spacer 4 including the primary sealant applied thereon 19 from the paragraph 21 towards the inside 12 of the spacer 4 decreases. In a similar way, that takes over the secondary sealant 20 measured width of the spacer 4 from the paragraph 21 starting to the base 5 down. This has the advantage that when pressing the insulating glass pane 1 no bubbles in the sealing compounds 19 . 20 be included because the air, starting from paragraph 21 , from the gap on the one hand into the interior 17 and on the other hand is displaced into the external environment ( 5 ).

Preferably, the spacer 4 so on the size of the glass panes 2 and 3 agreed that they have the same scope. Then, as in 1 is shown, the outside 6 the base 5 of the spacer 4 flush with the edge of the two glass panes 2 and 3 from. From the edge of the insulating glass pane 1 to the inside 12 of the spacer 4 results in a large sealing depth with moderate gap width, which is both for the sealing of the insulating glass pane 1 as well as for their solid composite is favorable.

The thickness of the base 5 is chosen so that it is sufficiently gastight and water vapor tight. To increase their gas tightness and water vapor tightness, one can take additional measures: so you can get into the base 5 integrate a metal foil or the outside of the base 5 Cover with a thin metal foil, which is on both sides in the concave surface area 15 extends into it.

That in the 7 to 10 illustrated embodiment differs from that in the 1 to 6 illustrated embodiment in that the extensions 36 of the spacer 4 do not end blunt, but are tapered to form, wherein they approach each other more closely than in the first embodiment, but without touching each other.

That in the 10 to 12 illustrated embodiment differs from that in the 7 to 10 illustrated embodiment in that the tapered extensions 36 not from the middle area of the thighs 11 go out, but from the far from the base 5 lying ends of the legs 11 , where the extensions 36 in place of the short projections provided in the preceding embodiments 8th to step. While in the embodiment of 7 to 10 the extensions 36 the shortest way the opposite leg 11 approach, they do that in the embodiment according to the 10 to 12 not, but extend there approximately at an angle of 45 ° to the base 5 and the respective opposite leg 11 , In the embodiment according to the 10 to 12 one comes with very little material for the spacer profile and achieves the lowest heat transfer between the individual glass panes 2 and 3 ,

That in the 7 to 12 illustrated embodiments differs from that in the 1 to 6 illustrated embodiment also in that not two different sealing compounds, but only a single sealant 25 on the outside of the thighs 11 is applied. You can in this case, as in the 7 and 10 shown with lenticular cross-section on the concave surface area 15 the thigh 11 be applied and is when pressing the insulating glass into the through the two flat surface areas 13 and 14 limited column displaced into it, so that it extends practically over the entire height of the thighs 11 extends.

In all the embodiments described above is the strand 18 so arranged that he does not have the level 16 protrudes, which are the ends of the legs 11 limited.

That in the 13 to 16 illustrated embodiment differs from that in the 1 to 6 illustrated embodiment in that the legs 11 a concave surface area 15 which is designed so that the width of the spacer 4 starting from the flat surface area 13 to the outside 6 the base 5 diminished and that the leg 11 at the base 5 no longer transition to a second level surface area. Notwithstanding the first embodiment, in the manufacture of the insulating glass is the secondary sealing compound 20 only subsequently applied after the two glass panes 2 and 3 with the spacer 4 over the primary sealant 19 are glued. In addition, the outline of the spacer 4 chosen a little smaller than the outline of the glass panes 2 and 3 so that the secondary sealant 20 in a thin layer also on the outside 6 the base 5 from the one glass pane 2 to the other glass pane 3 can extend.

The strand 18 extends close to the two glass panes 2 and 3 approach and determined by its appearance, which is preferably matte black, essentially the appearance of the spacer of the insulating glass pane. A dull black appearance is particularly favorable because it harmonizes with colored window frames and door frames and reflects their color without being obtrusive.

The 17 shows how in such an insulating glass pane 1 a rung 22 can be arranged. The rung 22 is designed as a hollow profile bar and with an end piece 23 connected, which is a plate 24 has, from which a first extension 26 into the rung 22 extends. From the other side of the plate 24 extends a second extension 27 by the strand 18 through into the open space 9 under the strand 18 , wherein by a barb-shaped contour of the second extension 27 can be achieved that he is behind the extensions 36 snaps in place and reliable on the spacer 4 anchored. By a barb-shaped contour of the first extension 26 you can see its displacement in the rung 22 difficult. An unwanted movement of the rung 22 in the longitudinal direction of the spacer 4 prevents the strand 18 on which the plate 24 lies and which the second extension 27 encloses.

That in the 18 to 22 illustrated embodiment differs from that in the 13 to 17 illustrated embodiment in that the extensions 36 the thigh 11 are designed tapering in a similar manner as in the example of 10 to 12 and that the size of the spacer in the outline of the size of the glass panes 2 and 3 similar, with the secondary sealant 20 only between the thighs 11 and the glass panes 2 and 3 is arranged, but not the outside 6 the base 5 covered. Otherwise, the contour of the outside of the legs 11 very similar to the example of the 13 to 17 ,

That in the 23 to 28 illustrated embodiment differs from that in the 1 to 6 illustrated embodiments in that only one of the two legs 11 an extension 36 which extends to the vicinity of the opposite leg 11 extends. Also in this case, the strand extends 18 , which on the extension 36 sticks, from the inside of one leg 11 to the opposite inner side of the opposite leg 11 , The convex contour of the strand 18 rises slightly over the inside 12 of the spacer 4 formed by the far from the base 5 lying end faces of the legs 11 , In this example, with an asymmetrically constructed spacer profile, the extension can 27 of the sprouts tail 23 not into the open space 39 under the strand 18 extend but beats on the extension 36 at. The extension 26 However, at the formed with undercuts upper ends of the legs 11 be anchored as in 27 shown.

Around the junction of the spacer frame 4 In the insulating glass pane is not visible, it is preferably with a badge 29 covered as it is in 28 is shown by way of example. In the example shown, the badge has 29 on its back two extensions 30 , which by the desiccant-containing mass 18 through into the underlying open space 39 can be plugged and thereby anchored. The extensions 30 prevent at the same time, that in further handling with the frame-shaped spacer 4 move the two mating ends of the profile bar laterally against each other. If such a badge 29 is undesirable, a lateral offset between the two profiled bar ends can also be prevented by that in the free space 39 a wedge 31 inserts, as in 29 shown. This wedge 31 is then passed through the desiccant-containing mass 18 covered.

The wedge 31 and the extensions 30 the badge 29 can also have barbs that resist the pulling apart of the profile bar ends. In such a case, the profile bar ends do not have to complement each other in a complementary manner, as for example in 8a is shown, they could collide instead dull. This is suitable to simplify the connection of the profile bar ends.

1

insulating glass pane

2

pane

3

pane

4

spacer

5

Base

6

Outside of 5

7

Inside of 5

8th

projections

10

faces

11

Leg, Leg of the spacer

12

inside of the spacer

13

first level surface area

14

second level surface area

15

concave surface area

16

level

17

inner space the insulating glass pane

18

strand

19

primary sealant

20

secondary sealant

21

paragraph

22

rung

23

tail

24

plate

25

single sealing compound

26

first extension

27

second extension

29

plaque

30

extension

31

wedge

36

projections

37

gap

38

plane of symmetry

39

free space

Claims (52)

Insulating glass pane in which two individual glass panes ( 2 . 3 ) by a frame-shaped spacer ( 4 ), which is a base ( 5 ) and two legs extending from the base ( 11 ), which only via the base ( 5 ) are integrally connected, the base ( 5 ) is directed outwards and above the base ( 5 ) between the thighs ( 11 ) there is a gap between the legs ( 11 ) of the spacer ( 4 ) and the two adjacent glass sheets ( 2 . 3 ) at least one type of sealing compound ( 19 . 20 ; 25 ) is provided and on the spacer ( 4 ) a strand ( 18 ), which contains a desiccant, characterized in that the strand ( 18 ) at a distance from the base ( 5 ) and the space between the legs ( 11 ) bridged. Insulating glass pane according to claim 1, characterized in that at least one of the legs ( 11 ) at a distance from the base ( 5 ) an extension ( 36 ), which is in the space between the legs ( 11 ). Insulating glass pane according to claim 2, characterized in that both legs ( 11 ) such an extension ( 36 ) to have. Insulating glass pane according to claim 2 or 3, characterized in that the at least one extension ( 36 ) over the entire circumference of the frame-shaped spacer ( 4 ). Insulating glass pane according to one of claims 2 to 4, characterized in that the strand ( 18 ) especially on the basis ( 5 ) facing away from the at least one extension ( 36 ) liable. Insulating glass pane according to one of claims 2 to 5, characterized in that the at least one extension ( 36 ) in the direction of the opposite leg ( 11 ) rejuvenated. Insulating glass pane according to claim 6, characterized in that the at least one extension ( 36 ) pointed. Insulating glass pane according to one of claims 2 to 7, characterized in that the of the respective leg ( 11 ) removed free end of the respective extension ( 36 ) below a level ( 16 ), which depends on the base ( 5 ) distal ends of the legs ( 11 ) limited. Insulating glass pane according to claim 8, characterized in that the extensions ( 36 ) in total below the said level ( 16 ) lie. Insulating glass pane according to one of claims 3 to 9, characterized in that the extensions ( 36 ) are at a distance from each other. Insulating glass pane according to claim 10, characterized in that the extensions ( 36 ) with respect to a base ( 5 ) of the spacer ( 4 ) intersecting, longitudinal symmetry planes are mirror-symmetrical. Insulating glass pane according to one of claims 2 to 11, characterized in that the strand ( 18 ) in addition to the adhesion to the thighs ( 11 ) and / or the at least one extension ( 36 ) with the at least one extension ( 36 ) is also interlocked. Insulating glass pane according to claim 12, characterized in that between the strand ( 18 ) and the at least one extension ( 36 ) a positive connection exists. Insulating glass pane according to claim 13, characterized in that the strand ( 18 ) the edge of the extension ( 36 ) surrounds. Insulating glass pane according to one of the preceding claims, characterized in that the base ( 5 ) opposite surface of the strand ( 18 ) is convex. Insulating glass pane according to one of the projecting the claims, characterized in that the strand ( 18 ) below the level ( 16 ), which depends on the base ( 5 ) distal ends of the legs ( 16 ) limited. Insulating glass pane according to one of the preceding claims, characterized in that the strand ( 18 ) is formed from a common for insulating glass panes sealant. Insulating glass pane according to one of the preceding claims, characterized in that the strand ( 18 ) is colored. Insulating glass pane according to one of the preceding claims, characterized in that the spacer ( 4 ) is arranged so that it is flush with the edges of the individual glass sheets ( 2 . 3 ) completes. Insulating glass pane according to one of the preceding claims, characterized in that the spacer ( 4 ) is arranged so that it forms the edge of the insulating glass pane, and that the outside ( 6 ) of the spacer ( 5 ) is free of sealant. Insulating glass pane according to one of the preceding claims, characterized in that the profile height of the spacer ( 4 ) Is 8 mm to 15 mm. Insulating glass pane according to one of the preceding claims, characterized in that the profile height of the spacer ( 4 ) Is 9 mm to 12 mm. Insulating glass pane according to one of the preceding claims, characterized in that the spacer ( 4 ) One Base ( 5 ), which is 2 mm to 5 mm thick. Insulating glass pane according to one of the preceding claims, characterized in that the spacer ( 4 ) One Base ( 5 ), which is 2.5 mm to 4 mm thick. Insulating glass pane according to one of the preceding claims, characterized in that the spacer ( 4 ) consists at least partially of a plastic, in particular of an extruded profile. Insulating glass pane according to claim 25, characterized in that the outside ( 6 ) the base ( 5 ) of the spacer ( 4 ) is metallic. Insulating glass pane according to claim 25, characterized in that in the base ( 5 ) of the spacer ( 4 ) a diffusion barrier is embedded. Insulating glass pane according to claim 25, characterized in that that the Diffusion barrier is a metal foil. Insulating glass pane according to one of the preceding claims, characterized in that between the spacer ( 4 ) and the glass sheets ( 2 . 3 ) only a single sealant ( 25 ) is provided. Insulating glass pane according to claim 29, characterized in that the sole sealing compound ( 25 ) is a single-component curing adhesive. Insulating glass pane according to claim 29, characterized in that the sole sealing compound ( 25 ) is a hot melt adhesive. Insulating glass pane according to one of the preceding claims, characterized in that the limbs ( 11 ) of the spacer ( 4 ) on its outer side a concave surface area ( 15 ) to have. Insulating glass pane according to one of the preceding claims, characterized in that in the gap ( 28 . 29 ) between the two legs ( 11 ) of the spacer ( 4 ) and the two adjacent glass sheets ( 2 . 3 ) a primary sealant ( 19 ) and in the outwardly adjoining section of the gap (FIG. 28 . 29 ) of the insulating glass pane, a secondary sealing compound ( 20 ) are provided. Insulating glass pane according to claims 32 and 33, characterized in that the secondary sealing compound ( 20 ) on the concave surface area ( 15 ) of the thighs ( 11 ) and that the concave surface area ( 15 ) on its base ( 5 ) facing away from a flat surface area ( 13 ) to which the primary sealant ( 19 ) is applied. Insulating glass pane according to claim 34, characterized in that the concave surface area ( 15 ) on its other side another planar surface area ( 14 ) is adjacent. Insulating glass pane according to claim 35, characterized in that on the further flat surface area ( 14 ) a part of the second sealant ( 20 ) liable. Insulating glass pane according to one of the preceding claims, characterized in that the secondary sealant ( 20 ) extends over a depth of at least 5 mm. Insulating glass pane according to claim 37, characterized in that the secondary sealing compound ( 20 ) extends over a depth of 6 to 8 mm. Insulating glass pane according to one of the preceding claims, characterized in that the secondary sealing compound ( 20 ) over the entire height of the legs ( 11 ) of the spacer ( 4 ), provided they are not covered by primary sealant ( 19 ) are covered. Method for producing an insulating glass pane having the features according to one of the preceding claims by (a) providing a profiled bar to form a frame-shaped spacer ( 4 (b) applying a mass containing a desiccant to the legs ( 11 ) of the profile bar, so that the mass of the space between the legs ( 11 ), (c) applying a primary sealant ( 19 ) on the outside of the legs ( 11 ), (d) forming the profile bar into a frame-shaped structure, (e) closing the frame-shaped structure to form a spacer ( 4 ) by connecting the ends of the profile bar together, (f) applying the spacer ( 4 ) to a first glass pane ( 2 ) so that it is in the neighborhood of the edge of the first pane of glass ( 2 ) adheres to this, (g) applying a second glass pane ( 3 ) parallel to the first glass pane ( 2 ) to the spacer ( 4 ), so that this also on the second glass pane ( 3 ), (h) compressing the two glass panes ( 2 . 3 ) to the predetermined thickness for the insulating glass pane, (i) optionally connecting the spacer ( 4 ) with the two glass panes ( 2 . 3 ) by applying a secondary sealant ( 20 ), wherein the order of steps (b) and (c) can be reversed and steps (b) and (c) can also be performed concurrently or overlapping in time. Method according to claim 40, characterized in that between the spacer ( 4 ) and the first glass pane ( 2 ) a first strand and between the spacer ( 4 ) and the second glass pane ( 3 ) a second strand of the second sealing compound ( 20 ) is applied, which is separated from the first strand. Method for producing an insulating glass pane having the features according to one of Claims 1 to 39 by (a) providing a profiled bar, (b) applying a mass containing a desiccant to the limbs ( 11 ) of the profile bar, so that the mass of the space between the legs ( 11 ), (c1) applying a primary sealant ( 19 ) on the outside of the legs ( 11 ) of the profile bar at a distance from the base ( 5 ), (c2) applying a secondary sealant ( 20 ) on the outside of the legs ( 11 ) of the profile bar, in the area between the base ( 5 ) and the primary sealant ( 19 ), (d) forming the profile bar into a frame-shaped structure, (e) closing the frame-shaped structure to form a spacer ( 4 ) by connecting the ends of the profile bar together, (f) applying the spacer ( 4 ) to a first glass pane ( 2 ) so that it is in the neighborhood of the edge of the first pane of glass ( 2 ) adheres to this, (g) applying a second glass pane ( 3 ) parallel to the first glass pane ( 2 ) to the spacer ( 4 ), so that this also on the second glass pane ( 3 ), (h) compressing the two glass panes ( 2 . 3 ) to the predetermined thickness for the insulating glass pane, wherein the order of the steps (b), (c1) and (c2) can be changed and the steps (b), (c1) and (c2) are also performed simultaneously or overlapped in time can. A method according to claim 42, characterized in that the secondary sealing compound ( 20 ) to the primary sealant ( 19 ) is applied adjacent. A method according to claim 42 or 43, characterized in that the secondary sealing compound ( 20 ) of the primary sealant ( 19 ) trailing, but temporally overlapping, is applied. Method according to one of claims 40 to 44, characterized in that the mass which contains a desiccant, simultaneously or overlapping in time with the primary sealing compound ( 19 ) is applied. Method according to one of claims 40 to 45, characterized in that a machining of the profile bar before applying the primary sealing compound ( 19 ) and the mass containing the desiccant takes place. Method according to one of Claims 40 to 47, characterized in that a gap in the primary sealing compound (15) which is present after joining the ends of the profile bar at the connection point ( 19 ) and / or in which the dry containing strand ( 18 ) is subsequently closed. Method according to one of Claims 40 to 47 for producing an insulating glass pane ( 1 ) into which at least one rung ( 22 ) fitted with an end piece ( 23 ) in a recess or opening on the inside ( 12 ) of the spacer ( 4 ) engages, characterized in that the point at which the rung ( 22 ), on the profile bar or on the strand ( 18 ) and at the marked position an end piece ( 23 ) through the strand ( 18 ) through into the underlying recess or opening of the spacer ( 4 ) is introduced. Method according to one of claims 40 to 48, characterized in that the connection point in the spacer frame ( 4 ) on the inwardly facing side (12) of the profile bar with a badge ( 29 ) is covered. Method according to claim 49, characterized in that the sticker ( 29 ) on its underside one or more extensions ( 30 ), which in the desiccant-containing composition ( 18 ). Method according to claim 50, characterized in that the extensions ( 30 ) to one of the desiccant-containing composition ( 18 ) covered recess ( 39 ) or opening in the profile bar. Method according to one of claims 40 to 48, characterized in that at the connection point in the spacer frame ( 4 ) a wedge connecting the two profiled bar ends ( 31 ) is inserted.