Segmented spacer for insulated glass units

Abstract

The invention relates to a spacer (I) for insulated glass units, which at least comprises a main part (1) co-extruded from a first plastic (7) and a second plastic (8), having: a first side wall (2.1) and a second side wall (2.2) arranged parallel thereto; a glazing interior wall (3) which connects the side walls (2.1, 2.2) to one another; an outer wall (4) which is arranged substantially parallel to the glazing interior wall (3) and connects the side walls (2.1, 2.2) to one another directly or via connecting walls (6.1, 6.2); a cavity (5) which is surrounded by the side walls (2.1, 2.2), the glazing interior wall (3), and the outer wall (4) or by the side walls (2.1, 2.2), the glazing interior wall (3), the outer wall (4) and the connecting walls (6.1, 6.2); wherein the main part (1) is designed as a hollow profile formed from the first plastic (7) and the second plastic (8) and has an alternating arrangement of A segments and B segments, wherein an A segment is formed from the first plastic (7) and a B segment is formed from the second plastic (8) and the A and B segments extend along a longitudinal direction (Z) of the spacer (I) and abut one another in the longitudinal direction (Z), the outer wall (4) comprises a first section (9), which consists of a B segment and is arranged in the centre of the outer wall (4) in a transverse direction (X) of the spacer (I), which is perpendicular to the longitudinal direction (Z) of the spacer (I), and over the entire thickness (D1) of the outer wall (4) in a vertical direction (Y) of the spacer (I), which is perpendicular to the longitudinal direction (Z) of the spacer (I), the first side wall (2.1) comprises a second section (10), which consists of a B segment, the second side wall (2.2) comprises a third section (11), which consists of a B segment, and the second plastic (8) has a lower thermal conductivity than the first plastic (7).

Description

[0001] Segmented spacer for insulating glass units

[0002] The invention relates to spacers for insulating glass units, a method for producing a spacer, an insulating glass unit, a method for producing an insulating glass unit and the use of the insulating glass unit.

[0003] Insulating glass units typically contain at least two panes of glass or polymeric materials. The panes are separated by a gas or vacuum space defined by a spacer. The thermal insulation properties of insulating glass are significantly higher than those of single-pane glazing and can be further enhanced and improved by triple glazing or with special coatings. For example, silver-containing coatings reduce the transmission of infrared radiation, thus reducing the cooling of a building in winter.

[0004] In addition to the quality and construction of the panes, the other components of an insulating glass unit are also of great importance. The seal and, above all, the spacer have a significant influence on the quality of the insulating glass unit.

[0005] The thermal insulation properties of insulating glass units are significantly influenced by the thermal conductivity of the edge seal, particularly the spacer. With metallic spacers, the high thermal conductivity of the metal leads to the formation of a thermal bridge at the edge of the pane. This thermal bridge leads, on the one hand, to heat loss in the edge area of ​​the insulating glass unit and, on the other hand, to the formation of condensation on the inner pane in the area of ​​the spacer in conditions of high humidity and low outside temperatures. To solve these problems, thermally optimized, so-called "warm edge" systems are increasingly being used. These spacers are made of materials with lower thermal conductivity, particularly plastics.

[0006] From a thermal conductivity perspective, polymer spacers are preferable to metallic spacers. However, polymer spacers have several disadvantages. Firstly, the impermeability of polymer spacers against moisture and gas loss is insufficient. Various solutions exist for this, in particular by applying a barrier film to the outside of the spacer (see, for example, WO2013 / 104507 A1). Secondly, the coefficients of linear expansion of plastics are much higher than those of glass. To equalize the coefficients of linear expansion, glass fibers can be added, for example (see EP0852280 A1 and DE19807454 A1). However, an increased glass fiber content impairs the thermally conductive properties of the spacer, so precise optimization is required. Glass fibers and similar fillers also improve the longitudinal stiffness of the spacer.

[0007] Polymeric glass fiber-reinforced spacers are so brittle that, unlike metallic spacers, they cannot be cold-bent. To produce a spacer frame for an insulating glass unit, several pieces of spacer must be connected via connectors and then glued or welded. Each joint must be carefully sealed. One approach to increasing bendability is the integration of a metallic strip into the polymer base body (described, for example, in WO2015 / 043848 A1 and DE19807454 A1). However, integrating a metallic strip into the polymer base body is very complex during production.

[0008] Polymer spacers without additional fillers such as glass fibers are flexible and insufficiently stiff. However, longitudinal stiffness (refers to the deflection in the longitudinal direction) is important for machinability. Improvements in longitudinal stiffness can be achieved by integrating metallic strips (see previous point) or externally applying metallic elements to the body (see, for example, EP1055046 B2 and EP3241972 A1). However, applying a metallic strip impairs the thermally conductive properties of the spacer because the metallic elements have increased thermal conductivity. A particular difficulty with externally applying individual metallic elements is ensuring a perfect seal against moisture penetration.

[0009] In view of the above, the design of a spacer means finding a compromise between mechanical performance and thermal insulation properties, since the best performing materials tend to have poor mechanical performance from a thermal point of view and vice versa.

[0010] From W02021 / 009176 A1, a combination of different materials with different properties in a spacer produced by co-extrusion is known, wherein the different materials are arranged coaxially in the spacer. In particular, a first plastic and a second plastic are used, wherein the second plastic has a lower thermal conductivity and a higher flexibility than the first plastic and the base body of the spacer is designed as a hollow profile made of the second plastic, in which the first plastic is arranged on the inside, at least in regions, directly adjacent to the hollow profile. However, this does not allow a spacer with the lowest possible thermal conductivity to be achieved, since it cannot be guaranteed that heat exchange between the internal first plastic and the panes can be prevented.

[0011] DE 10 2011 009 359 A1 discloses a spacer profile comprising a hollow profile body made of a first plastic material and a diffusion barrier region made of a second plastic material with phyllosilicate, which is formed at least as part of the outer wall to form a diffusion barrier. By arranging the diffusion barrier region made of the second plastic material with phyllosilicate, low thermal conductivity along the outer wall of the spacer cannot be guaranteed.

[0012] In view of the above-described prior art, the present invention is based on the object of providing an improved spacer which has good mechanical performance and improved thermal insulation properties, as well as being economically viable to produce and environmentally friendly.

[0013] The object of the present invention is achieved by a spacer for insulating glass units according to independent claim 1 or 11. Preferred embodiments of the invention are evident from the subclaims.

[0014] A method for producing the spacers according to the invention, an insulating glass unit according to the invention, a method for producing the insulating glass unit according to the invention and their use according to the invention emerge from further independent claims.

[0015] The spacer according to the invention for insulating glass units according to a first aspect comprises at least one base body co-extruded from a first plastic and a second plastic, comprising a first side wall and a second side wall arranged parallel thereto, a glazing interior wall which connects the side walls to one another, an outer wall which is arranged substantially parallel to the glazing interior wall and connects the side walls to one another directly or via connecting walls, a cavity which is enclosed by the side walls, the glazing interior wall and the outer wall or by the side walls, the glazing interior wall, the outer wall and the connecting walls, wherein the base body is designed as a hollow profile formed from the first plastic and the second plastic, which has an alternating arrangement of segments A and segments B,wherein a segment A is formed from the first plastic and a segment B is formed from the second plastic, and the segments A and B each extend along a longitudinal direction Z of the spacer and adjoin one another in the longitudinal direction Z, the outer wall comprises a first section consisting of a segment B and is arranged in the center of the outer wall in a transverse direction X of the spacer, which is perpendicular to the longitudinal direction Z of the spacer, and over the entire thickness D1 of the outer wall in a height direction Y of the spacer, which is perpendicular to the longitudinal direction Z of the spacer, the first side wall comprises a second section consisting of a segment B, the second side wall comprises a third section consisting of a segment B, and the second plastic has a lower thermal conductivity than the first plastic.

[0016] The first sidewall and the second sidewall represent the sides of the spacer where the outer panes of an insulating glass unit are mounted during installation. The first sidewall and the second sidewall run parallel to each other.

[0017] The outer wall of the base body is the wall opposite the glazing interior wall, which faces away from the interior of the insulating glass unit (inner cavity) toward the outer cavity. The outer wall preferably runs essentially perpendicular to the side walls.

[0018] The optional first connecting wall and the optional second connecting wall preferably extend at an angle a (alpha) of 30° to 60° to the outer wall. The angled shape of the first connecting wall and the second connecting wall improves the stability of the base body and enables better bonding and insulation of the spacer according to the invention.

[0019] The base body preferably has a width of 5 mm to 80 mm, preferably 10 mm to 20 mm, along the glazing interior wall. Within the meaning of the invention, the width is the dimension extending between the side walls. The width is the distance between the opposite surfaces of the two side walls. The selection of the width of the glazing interior wall determines the distance between the panes of the insulating glass unit. The exact dimensions of the glazing interior wall depend on the dimensions of the insulating glass unit and the desired gap size between the panes.

[0020] The base body preferably has a height of 5 mm to 15 mm along the side walls, particularly preferably 5 mm to 10 mm. Within this height range, the spacer offers advantageous stability while remaining advantageously unobtrusive within the insulating glass unit. Furthermore, the cavity of the spacer is advantageously sized to accommodate a suitable amount of desiccant. The height of the spacer is the distance between the opposite surfaces of the outer wall and the glazing interior wall.

[0021] The glazing interior wall, the outer wall, the connecting walls and the side walls are preferably 0.5 mm to 1.5 mm, particularly preferably 0.8 mm to 1.0 mm, thick. According to one embodiment, the glazing interior wall, the outer wall, the connecting walls and the side walls have a uniform thickness. According to a further embodiment, the glazing interior wall, the outer wall, the connecting walls and / or the side walls have different thicknesses. For example, regions of the base body that are exposed to strong mechanical stress can have a greater thickness than regions that represent more thermally relevant regions of the base body. In particular, according to a preferred embodiment, the glazing interior wall and the outer wall have a smaller thickness than the side walls and the connecting walls. The total thickness of the outer wall of the spacer according to the first aspect is designated D1 according to the invention.“Total thickness” here means the complete cross-section of the outer wall in the height direction Y.

[0022] A desiccant can be arranged in the cavity of the spacer. In addition, perforations can be provided in the interior glazing wall, which create a connection to the inner cavity between the panes in the insulating glass unit. Desiccant present in the cavity can then absorb moisture from the inner cavity between the panes via the perforations in the interior glazing wall. According to a preferred embodiment, the desiccant is selected from silica gels, molecular sieves, CaCh, Na2SC>4, activated carbon, silicates, bentonites, zeolites and / or mixtures thereof. The desiccant can be introduced directly before assembly of the insulating glass unit. This ensures a particularly high absorption capacity of the desiccant in the finished insulating glass unit. The interior glazing wall preferably has openings / perforations which allow the absorption of atmospheric moisture by the desiccant contained in the base body.

[0023] According to the invention, the base body of the spacer is a base body co-extruded from a first plastic and a second plastic, ie the base body was produced by co-extrusion of a first plastic with a second plastic.

[0024] The spacer according to the invention has a transverse direction X, a vertical direction Y, and a longitudinal direction Z, each of which is perpendicular to one another. The longitudinal direction Z is the extension direction of the spacer. According to the invention, segments A and B each extend along the longitudinal direction Z of the spacer and adjoin one another in the longitudinal direction Z. The transverse direction X of the spacer runs parallel to the glazing interior wall and the outer wall of the spacer. The vertical direction Y of the spacer runs parallel to the side walls of the spacer.

[0025] For the purposes of the invention, an "alternating arrangement" of segments A and segments B means that the segments A and B are arranged alternately along the cavity in the cross-sectional view of the base body. This alternating arrangement of segments A and B allows for good thermal insulation of the spacer, since at least in sections along the cavity, a segment B formed from the second plastic with lower thermal conductivity is arranged, separating regions of the spacer that have a segment A formed from the first plastic with higher thermal conductivity.

[0026] According to the invention, segment A is formed from the first plastic, and segment B is formed from the second plastic. Furthermore, the second plastic has a lower thermal conductivity than the first plastic. Preferably, the second plastic has a thermal conductivity that is at least 5%, particularly preferably at least 10%, further preferably at least 20% lower than the first plastic.

[0027] According to one embodiment, the second plastic has a lower rigidity than the first plastic. Preferably, the second plastic has a rigidity that is at least 5%, particularly preferably at least 10%, most preferably at least 30% lower than the first plastic.

[0028] By combining two plastics with different properties in terms of thermal conductivity and, if applicable, rigidity, specific areas in the base body of the spacer can be thermally or thermally and mechanically optimized.

[0029] In a preferred embodiment of the spacer according to the invention, the first plastic is a glass fiber-reinforced plastic, and the second plastic is a plastic that has a lower glass fiber content than the first plastic or is a glass fiber-free plastic. The glass fiber content of the glass fiber-reinforced plastic is preferably 10% to 40%, in particular 25% to 40%.

[0030] According to one embodiment, the second plastic is a foamed plastic, which can improve the thermal properties of the spacer. In a further embodiment of the spacer according to the invention, both the first plastic and the second plastic are foamed plastics, and the first plastic is a glass fiber-reinforced plastic.

[0031] The first plastic and the second plastic can be plastics based on the same polymer or copolymer. However, it is also possible for the first plastic and the second plastic to be based on different polymers or copolymers. Preferably, the first plastic and the second plastic are based on the same polymers or copolymers. This makes it particularly easy to achieve a stable connection between segment A and segment B.

[0032] The first plastic and the second plastic independently contain, for example, polyethylene (PE), polypropylene (PP), polycarbonate (PC), thermoplastic polyurethane (TPU), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymethyl methacrylate (PMMA), PET / PC, PBT / PC, polyamide, polystyrene (PS), styrene-acrylonitrile copolymer (SAN), polymethyl methacrylate, polyacrylate, acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene-acrylate copolymer (ASA), acrylonitrile-butadiene-styrene-polycarbonate (ABS / PC) and / or copolymers or mixtures thereof. Preferably, the first plastic and the second plastic independently contain polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), styrene-acrylonitrile copolymer (SAN), acrylonitrile-butadiene-styrene copolymer (ABS) and / or copolymers or mixtures thereof.

[0033] In one embodiment, the first plastic is a glass fiber reinforced PP and the second plastic is a PP that is not glass fiber reinforced.

[0034] In a preferred embodiment, the first plastic is a glass fiber reinforced SAN and the second plastic is a SAN that is not glass fiber reinforced.

[0035] In a further preferred embodiment, the first plastic is a glass fiber reinforced ABS and the second plastic is an ABS that is not glass fiber reinforced.

[0036] In a further embodiment, the first plastic is a glass fiber reinforced ABS and the second plastic is a TPU that is not glass fiber reinforced.

[0037] According to the invention, the outer wall comprises a first section consisting of a segment B arranged in the center of the outer wall in the transverse direction X of the spacer and across the entire thickness D1 of the outer wall in the vertical direction Y of the spacer. The inventive arrangement of the first section ensures good thermal insulation along the outer wall. This is particularly advantageous when using the spacer in an insulating glass unit, as it allows the heat transfer between a first pane and a second pane, between which the outer wall is located, to be significantly reduced or prevented.

[0038] According to the invention, the first section is arranged in the center of the outer wall in the transverse direction X of the spacer. This means that the first section extends symmetrically outwards in both directions from a center line that divides the outer wall into two equal parts when viewed from the hollow profile. "Symmetrical" here means that the two sections of the first section, which extend in both directions from the center line, are approximately the same length. The symmetrical arrangement of the first section ensures that when pressure is exerted on the spacer, the pressure is evenly distributed and that no distortion of the spacer's shape occurs during its manufacturing process.

[0039] According to one embodiment, the first section extends over at least 20%, preferably at least 30%, further preferably at least 40%, even more preferably at least 45%, of the outer wall in the transverse direction X of the spacer. The higher the percentage of the first section on the outer wall, the stronger the thermal insulation along the outer wall. In one embodiment of the present invention, the first section extends over at most 95%, preferably at most 90%, further preferably at most 80%, even more preferably at most 75%, of the outer wall in the transverse direction X of the spacer. This ensures that the outer wall has sufficiently high thermal insulation properties.In one embodiment, a total of at least 5%, preferably at least 10%, more preferably at least 20%, even more preferably at least 25% of the outer wall in the transverse direction X of the spacer has sections formed from the first plastic. According to this embodiment, the outer wall has sufficiently high thermal insulation properties. The outer wall preferably comprises two sections formed from the first plastic, between which the first section is arranged.

[0040] According to the invention, the first side wall comprises a second section consisting of a segment B. The inventive arrangement of the second section ensures good thermal insulation along the first side wall. This is particularly advantageous when using the spacer in an insulating glass unit, since the first side wall is connected to a first pane of the insulating glass unit, and thus the arrangement of the second section can prevent or reduce heat transfer between the first pane and the spacer.

[0041] According to one embodiment, the second section is arranged over the entire thickness of the first side wall, so that in this area a good thermal insulation property can be achieved along the first side wall.

[0042] In one embodiment of the present invention, the second section extends further to the junction of the first side wall and the first connecting wall. According to a further embodiment, the second section extends further to the junction of the first side wall and the glazing interior wall. These embodiments allow the spacer to be given good thermal insulation properties in this area.

[0043] According to a further embodiment, the first side wall consists of the second section, whereby the best possible thermal insulation can be achieved along the entire contact surface with the first pane.

[0044] According to the invention, the second side wall comprises a third section consisting of a segment B. The inventive arrangement of the third section ensures good thermal insulation along the second side wall. This is particularly advantageous when using the spacer in an insulating glass unit, since the second side wall is connected to a second pane of the insulating glass unit, and thus the arrangement of the third section can prevent or reduce heat transfer between the second pane and the spacer.

[0045] According to one embodiment, the third section is arranged over the entire thickness of the second side wall, so that in this area a good thermal insulation property can be achieved along the second side wall.

[0046] In one embodiment of the present invention, the third section extends further to the junction of the second side wall and the second connecting wall. According to a further embodiment, the third section extends further to the junction of the second side wall and the glazing interior wall. These embodiments allow the spacer to be given good thermal insulation properties in this area.

[0047] According to a further embodiment, the second side wall consists of the third section, whereby the best possible thermal insulation can be achieved along the entire contact surface with the second pane.

[0048] In one embodiment of the invention, the glazing interior wall comprises a fourth section consisting of a segment B. The use of the fourth section ensures good thermal insulation along the glazing interior wall. This is particularly advantageous when using the spacer in an insulating glass unit, as it can significantly reduce or prevent heat transfer between a first pane and a second pane, between which the glazing interior wall is located.

[0049] According to one embodiment of the invention, the fourth section is arranged in the middle of the glazing interior wall in the transverse direction X of the spacer. This means that the fourth section extends symmetrically outwards in both directions from a center line which divides the glazing interior wall into two equal parts when viewed through the hollow profile. "Symmetrical" here means that the two sections of the fourth section extending in both directions from the center line are approximately the same length. The symmetrical arrangement of the fourth section ensures that when pressure is exerted on the spacer, the pressure is evenly distributed and that no distortion of the spacer's shape occurs during its manufacturing process.

[0050] According to one embodiment, the fourth section extends over at least 20%, preferably at least 30%, further preferably at least 40%, even more preferably at least 45%, of the glazing interior wall in the transverse direction X of the spacer. The higher the percentage share of the fourth section in the glazing interior wall, the stronger the thermal insulation along the glazing interior wall. In one embodiment of the present invention, the fourth section extends over at most 95%, preferably at most 90%, further preferably at most 80%, even more preferably at most 75%, of the glazing interior wall in the transverse direction X of the spacer. This ensures that the glazing interior wall has sufficiently high thermal insulation properties.In one embodiment, a total of at least 5%, preferably at least 10%, more preferably at least 20%, even more preferably at least 25% of the glazing interior wall in the transverse direction X of the spacer has sections formed from the first plastic. According to this embodiment, the glazing interior wall has sufficiently high thermal insulation properties. The glazing interior wall preferably comprises two sections formed from the first plastic, between which the fourth section is arranged.

[0051] According to one embodiment, the fourth section is arranged across the entire thickness of the glazing interior wall, so that good thermal insulation properties can be achieved along the glazing interior wall in this region. In one embodiment, the transition between the first side wall and the outer wall or the transition between the first connecting wall and the outer wall comprises a fifth section consisting of a segment A. Preferably, the fifth section extends from the transition into the first side wall and the outer wall or into the first connecting wall and the outer wall. Thus, forces acting due to a load in the region of the fifth section can be distributed even better.

[0052] According to one embodiment, the transition between the second side wall and the outer wall or the transition between the second connecting wall and the outer wall comprises a sixth section consisting of a segment A. The sixth section preferably extends from the transition into the second side wall and the outer wall or into the second connecting wall and the outer wall. Thus, forces acting due to a load in the region of the sixth section can be distributed even better.

[0053] In one embodiment, the transition between the first side wall and the glazing interior wall comprises a seventh section consisting of a segment A. Preferably, the seventh section extends from the transition into the first side wall and the glazing interior wall. This allows forces acting due to a load in the area of ​​the seventh section to be distributed even more effectively.

[0054] According to one embodiment of the invention, the transition between the second side wall and the glazing interior wall comprises an eighth section consisting of a segment A. Preferably, the eighth section extends from the transition into the second side wall and the glazing interior wall. This allows forces acting due to a load in the area of ​​the eighth section to be distributed even more effectively.

[0055] In one embodiment, the base body comprises at least eight sections, preferably exactly eight sections. The presence of the plurality of sections allows the properties of the spacer to be particularly well adjusted, particularly with regard to thermal insulation and, if appropriate, mechanical performance. The base body preferably consists of four segments A and four segments B.

[0056] According to one embodiment, the base body further comprises at least one section on the inside and / or outside of the cavity that is made of the first plastic and / or the second plastic. For example, a layer made of the second plastic can be arranged on the entire surface of the glazing interior wall on the outside of the cavity. This layer can be perceived by the observer when the spacer is installed in an insulating glass unit. By using, for example, a glass fiber-free plastic as the second plastic, a smooth surface can be obtained that has a high gloss effect. Alternatively or additionally, the second plastic can comprise a pigment that colors the second plastic.By using such a colored second plastic in the layer, the spacer can be perceived as colored by an outside observer without the entire spacer having to contain pigments, which makes the spacer more cost-effective and environmentally friendly overall. If the above-mentioned layer is used, the first plastic and the second plastic from which the base body is formed apart from the layer do not have to meet high optical requirements, since these are not visible from the outside, so that the first plastic and the second plastic for the base body, apart from the layer, can independently contain a recycled material or consist of a recycled material. According to a further embodiment, the entire base body has a layer made of the second plastic on the outside of the cavity. This can further improve the thermal insulation of the spacer.Alternatively or additionally, the entire base body may further comprise a layer formed from the first plastic on the inside of the cavity.

[0057] In one embodiment, the spacer comprises a barrier film. The barrier film is preferably arranged on the outer wall, the optional first connecting wall and the optional second connecting wall, and at least on part of the side walls. The barrier film can be attached to the base body, for example, with an adhesive. The barrier film comprises, for example, a metal-containing barrier layer made of 7 μm thick aluminum, a polymeric layer made of 12 μm thick polyethylene terephthalate (PET), and a metal-containing thin film made of 10 nm thick aluminum. Polyethylene terephthalate is particularly suitable for protecting the 7 μm thick aluminum layer from mechanical damage, since PET films are characterized by particularly high tear resistance. The film layers are arranged, for example, so that the aluminum layers, i.e., the metal-containing barrier layer and the metal-containing thin film, are on the outside.The film is preferably arranged on a base body so that the metal-containing barrier layer faces the outer wall. The metal-containing thin film then faces outward and simultaneously acts as an adhesive layer to the material of the secondary sealant. Thus, the metal-containing thin film not only acts as a barrier but also acts as an adhesion promoter. The barrier film can contain a foamed polymer layer to further improve its thermal properties.

[0058] The spacer according to the invention for insulating glass units according to a second aspect comprises at least one base body co-extruded from a first plastic and a second plastic, comprising a first side wall and a second side wall arranged parallel thereto, a glazing interior wall which connects the side walls to one another, wherein the glazing interior wall has a recess running essentially parallel to the side walls for receiving a pane, an outer wall which is arranged essentially parallel to the glazing interior wall and connects the side walls to one another directly or via connecting walls, cavities which are formed by the first side wall or the second side wall, the glazing interior wall, the outer wall and the recess or by the first side wall or the second side wall, the glazing interior wall, the outer wall, the first connecting wall orthe second connecting wall and the recess, wherein the base body is designed as a hollow profile formed from the first plastic and the second plastic, which has an alternating arrangement of segments A and segments B, wherein a segment A is formed from the first plastic and a segment B is formed from the second plastic and the segments A and B each extend along a longitudinal direction Z of the spacer and adjoin one another in the longitudinal direction Z, the outer wall comprises two first sections, which each consist of a segment B and are arranged in the middle between the first side wall and the second side wall.the second side wall and the recess are arranged in a transverse direction X of the spacer, which is perpendicular to the longitudinal direction Z of the spacer, and over the entire thickness D2 of the outer wall in a height direction Y of the spacer, which is perpendicular to the longitudinal direction Z of the spacer, the first side wall comprises a second section which consists of a segment B, the second side wall comprises a third section which consists of a segment B, and the second plastic has a lower thermal conductivity than the first plastic.

[0059] The configurations and definitions described above in connection with the spacer according to the invention according to the first aspect also apply equally to the spacer according to the invention according to the second aspect, unless explicitly deviating specifications are made for the spacer according to the invention according to the second aspect. The base body of the spacer according to the second aspect preferably has a width of 5 mm to 80 mm, preferably 10 mm to 35 mm, along the glazing interior wall.

[0060] The total thickness of the outer wall of the spacer according to the second aspect is designated D2 according to the invention. "Total thickness" here refers to the complete cross-section of the outer wall in the vertical direction Y.

[0061] According to the invention, the outer wall of the spacer according to the second aspect comprises two first sections, each consisting of a segment B and arranged in the middle between the first side wall or the second side wall and the recess in the transverse direction X of the spacer and over the entire thickness D2 of the outer wall in the vertical direction Y of the spacer. The inventive arrangement of the first sections can ensure good thermal insulation along the outer wall. This is particularly advantageous when the spacer is used in an insulating glass unit, since it can significantly reduce or prevent heat transfer between a first pane and a second pane, between which the outer wall is located.

[0062] According to the invention, the first sections are arranged in the middle between the first side wall and the second side wall, respectively, and the recess in the transverse direction X of the spacer according to the second aspect. This means that a first section extends symmetrically outwards in both directions from a center line that divides the outer wall between the first and second side walls and the recess into two equal parts when viewed through the hollow profile. "Symmetrical" here means that the two sections of the respective first section, which extend in both directions from the center line, are approximately the same length. The symmetrical arrangement of each first section ensures that when pressure is exerted on the spacer, the pressure is evenly distributed and that no distortion of the shape of the spacer occurs during its manufacturing process.

[0063] A desiccant can be arranged in each of the cavities of the spacer according to the second aspect. Furthermore, perforations can be provided in the interior glazing wall, establishing a connection to the inner cavity between the panes in the insulating glass unit. Desiccant present in the cavities can then absorb moisture from the inner cavity between the panes via the perforations in the interior glazing wall.

[0064] According to the invention, the base body of the spacer according to the second aspect has a recess. This recess runs essentially parallel to the side walls and is suitable for receiving a pane. The bottom of the recess is preferably formed by the outer wall. This achieves the greatest possible depth of the recess and maximizes the area of ​​the side flanks of the recess for stabilizing the pane received in the recess. According to an alternative embodiment, the bottom of the recess does not adjoin the outer wall, and both cavities extend below the recess.

[0065] The invention further comprises a method for producing a spacer according to the invention, wherein at least

[0066] (a) providing a first nozzle for extruding the first plastic;

[0067] (b) a second nozzle is provided for extruding the second plastic; and

[0068] (c) the first plastic and the second plastic are co-extruded to form the base body in such a way that this base body is formed as the hollow profile formed from the first plastic and the second plastic, which has the alternating arrangement of segments A and segments B.

[0069] Step (b) can also be performed before step (a).

[0070] The first and second dies are not particularly limited. Conventional dies for extruding plastics, which are known to those skilled in the art, can be used.

[0071] The invention further comprises an insulating glass unit comprising at least a first pane, a second pane, and a spacer according to the invention arranged circumferentially between the first pane and the second pane, wherein the first pane is attached to the first side wall via a primary sealing means, the second pane is attached to the second side wall via a primary sealing means, the spacer separates an inner space between the panes from an outer space between the panes, and a secondary sealing means is arranged in the outer space between the panes. This means that a primary sealing means is arranged between the first side wall and the first pane, and between the second side wall and the second pane. The primary sealing means is in contact with the side walls or with a barrier film, which can optionally be applied to the side walls, the optional connecting walls, and the outer wall of the base body.The first pane and the second pane are arranged parallel and preferably congruent. The edges of the two panes are therefore flush in the edge region, i.e. they are at the same height. The inner cavity is defined by the first and second panes and the interior glazing wall. The outer cavity is defined as the space defined by the first pane, the second pane and the optional barrier film on the outer wall or the outer wall of the base body. The outer cavity is at least partially filled with a secondary sealant. The secondary sealant contributes to the mechanical stability of the insulating glass unit and absorbs some of the climatic loads acting on the edge seal.

[0072] In a preferred embodiment of the insulating glass unit according to the invention, when a barrier film is present, the primary sealant extends to the areas of the first and second side walls adjacent to the glazing interior wall that are free of the barrier film. Thus, the primary sealant covers the transition between the base body and the barrier film, achieving a particularly good seal for the insulating glass unit. This reduces the diffusion of moisture into the cavity of the spacer at the point where the barrier film borders the plastic (less interfacial diffusion).

[0073] In a further preferred embodiment of the insulating glass unit according to the invention, the secondary sealant is applied along the first pane and the second pane such that a central region of the outer wall is free of secondary sealant. The central region refers to the region located centrally with respect to the two outer panes, in contrast to the two outer regions of the outer wall, which are adjacent to the first pane and second pane. In this way, good stabilization of the insulating glass unit is achieved, while at the same time material costs for the secondary sealant are saved. At the same time, this arrangement can be easily manufactured by applying two strands of secondary sealant to the outer wall in the outer region adjacent to the outer panes.In a further preferred embodiment, the secondary sealant is applied such that the entire outer cavity between the panes is completely filled with secondary sealant. This results in maximum stabilization of the insulating glass unit.

[0074] The secondary sealant preferably contains polymers or silane-modified polymers, particularly preferably organic polysulfides, silicones, room-temperature-curing (RTV) silicone rubber, peroxide-curing silicone rubber and / or addition-curing silicone rubber, polyurethanes, and / or butyl rubber. These sealants have a particularly good stabilizing effect.

[0075] The primary sealant preferably contains a polyisobutylene. The polyisobutylene can be a crosslinking or non-crosslinking polyisobutylene.

[0076] The first pane and the second pane of the insulating glass unit preferably contain glass, ceramic and / or polymers, particularly preferably quartz glass, borosilicate glass, soda-lime glass, polymethyl methacrylate or polycarbonate.

[0077] According to one embodiment, the first disc and the second disc each have a thickness of 2 mm to 50 mm, preferably of 3 mm to 16 mm, whereby both discs can also have different thicknesses.

[0078] In a preferred embodiment of the insulating glass unit according to the invention, the spacer frame consists of one or more spacers according to the invention. For example, this can be one spacer according to the invention that is bent into a complete frame. It can also be several spacers according to the invention that are connected to one another via one or more connectors. The connectors can be designed as longitudinal connectors or corner connectors. Such corner connectors can, for example, be designed as a molded plastic part with a seal, in which two spacers provided with a fermentation cut meet.

[0079] In principle, a wide variety of geometries for the insulating glass unit are possible, for example, rectangular, trapezoidal, and rounded shapes. To produce round geometries, the spacer according to the invention can, for example, be bent while heated. In another embodiment, the insulating glass unit comprises more than two panes. The spacer can, for example, contain recesses in which at least one additional pane is arranged. Multiple panes could also be formed as a laminated glass pane.

[0080] The invention further comprises a method for producing an insulating glass unit according to the invention, wherein at least

[0081] (a) a spacer according to the invention is provided;

[0082] (b) the spacer is assembled to form a spacer frame;

[0083] (c) a first disc and a second disc are provided;

[0084] (d) the spacer is fixed between the first pane and the second pane via a primary sealant;

[0085] (e) the disc assembly is pressed from the discs and the spacer; and

[0086] (f) the outer cavity between the panes is at least partially filled with a secondary sealant.

[0087] The insulating glass unit is manufactured mechanically on double glazing systems known to those skilled in the art. First, a spacer frame comprising the spacer according to the invention is provided. For example, the spacer frame is manufactured by welding, gluing and / or using a connector. A first pane and a second pane are provided and the spacer frame is fixed between the first and second panes using a primary sealant. The spacer frame is placed onto the first pane with the first side wall of the spacer and fixed using the primary sealant. Subsequently, the second pane is placed onto the second side wall of the spacer, congruent with the first pane, and is also fixed using the primary sealant, and the pane assembly is pressed together. The outer space between the panes is at least partially filled with a secondary sealant.The method according to the invention thus enables the simple and cost-effective production of an insulating glass unit. No special new machinery is required, since the design of the spacer according to the invention allows the use of conventional machines, such as those already available for spacers known from the prior art.

[0088] The first pane and the second pane can also be provided before the spacer frame is provided. As described above, when the spacer frame is provided, the base body of the spacer is manufactured by co-extrusion of a first plastic with a second plastic.

[0089] The invention further encompasses the use of the insulating glass unit according to the invention as interior glazing of a building, exterior glazing of a building and / or facade glazing.

[0090] The various embodiments of the invention can be implemented individually or in any combination. In particular, the features mentioned above and explained below can be used not only in the specified combinations, but also in other combinations or on their own, without departing from the scope of the present invention.

[0091] The invention is explained in more detail below with reference to drawings and exemplary embodiments. The drawings are schematic representations and not to scale. The drawings do not limit the invention in any way.

[0092] They show:

[0093] Fig. 1 shows a cross section of an embodiment of a spacer according to the invention

[0094] I,

[0095] Fig. 2 shows a cross section of a further embodiment of a spacer I according to the invention,

[0096] Fig. 3 shows a cross section of a further embodiment of a spacer I according to the invention,

[0097] Fig. 4 shows a cross section of a further embodiment of a spacer I according to the invention,

[0098] Fig. 5 shows a cross section of an embodiment of a spacer according to the invention

[0099] II,

[0100] Fig. 6 is a perspective view of a cross section of an embodiment of a spacer I according to the invention,

[0101] Fig. 7. a cross-section of an embodiment of an insulating glass unit III according to the invention, and

[0102] Fig. 8 is a flow diagram of a process according to the invention.

[0103] Fig. 1 shows a cross-section of an embodiment of a spacer I according to the invention. In the embodiment shown in Fig. 1, the spacer I comprises a base body 1, which is formed from a first side wall 2.1, a second side wall 2.2 arranged parallel thereto, a glazing interior wall 3, an outer wall 4, a first connecting wall 6.1, a second connecting wall 6.2 and a cavity 5. The first side wall 2.1 and the second side wall 2.2 are connected to one another via the glazing interior wall 3. The outer wall 4 is arranged substantially parallel to the glazing interior wall 3 and is connected to the first side wall 2.1 via the first connecting wall 6.1 and to the second side wall 2.2 via the second connecting wall 6.2. The first connecting wall 6.1 and the second connecting wall 6.2 are optional; alternatively, the first side wall 2.1 and the second side wall 2.2 can also be connected directly to the outer wall 4. The cavity 5 is enclosed by the first side wall 2.1, the glazing interior wall 3, the second side wall 2.2, the first connecting wall 6.1, the second connecting wall 6.2 and the outer wall 4. The connecting walls 6.1, 6.2 preferably run at an angle a (alpha) of 30° to 60° to the outer wall 4. The angled shape of the first connecting wall 6.1 and the second connecting wall 6.2 improves the stability of the base body and enables better bonding and insulation of the spacer I according to the invention.

[0104] The base body 1 is designed as a hollow profile formed from a first plastic 7 and a second plastic 8, which has an alternating arrangement of segments A and segments B, wherein a segment A is formed from the first plastic 7 and a segment B is formed from the second plastic 8 and the segments A and B each extend along a longitudinal direction Z of the spacer I and adjoin one another in the longitudinal direction Z.

[0105] The outer wall 4 comprises a first section 9 which consists of a segment B and is arranged in the middle of the outer wall 4 in the transverse direction X of the spacer I and over the entire thickness D1 of the outer wall 4 in a height direction Y of the spacer I.

[0106] The first side wall 2.1 comprises a second section 10 consisting of a segment B, and the second side wall 2.2 comprises a third section 11 consisting of a segment B.

[0107] The transition of the first connecting wall 6.1 and the outer wall 4 comprises a fifth section 13 consisting of a segment A, and the transition of the second connecting wall 6.2 and the outer wall 4 comprises a sixth section 14 consisting of a segment A.

[0108] The transition of the side wall 2.1 and the glazing interior wall 3 comprises a seventh section 15 consisting of a segment A, and the transition of the side wall 2.2 and the glazing interior wall 3 comprises an eighth section 16 consisting of a segment A. The seventh section 15 and the eighth section 16 are connected via the glazing interior wall 3, which consists of a segment A. This means that a segment A extends integrally along the entire glazing interior wall 3 and comprises the seventh section 15 and the eighth section 16.

[0109] The wall thickness of the base body 1 is, for example, 1 mm. This wall thickness also corresponds to the thickness D1 in this embodiment. The width b of the base body 1 along the glazing interior surface 3 is, for example, 12 mm. The total height g of the base body 1 is, for example, 6.5 mm.

[0110] The first plastic 7 is, for example, an acrylonitrile-butadiene-styrene copolymer (ABS) with a glass fiber content of 40% and the second plastic 8 is, for example, the same acrylonitrile-butadiene-styrene copolymer (ABS), but which does not contain glass fibers.

[0111] The cavity 5 can accommodate a desiccant (not shown in Fig. 1). Perforations (not shown in Fig. 1) can be provided in the glazing interior wall 3, which create a connection to the interior cavity of the insulating glass unit. The desiccant can then absorb moisture from the interior cavity via the perforations in the glazing interior wall 3.

[0112] The base body 1 of the embodiment of a spacer I according to the invention shown in Fig. 1 is produced by co-extrusion of the first plastic 7 and the second plastic 8.

[0113] Fig. 2 shows a cross section of a further embodiment of a spacer I according to the invention. The embodiment shown in Fig. 2 differs from that shown in Fig. 1 only in that the glazing interior wall 3 comprises a fourth section 12, which consists of a segment B. Fig. 3 shows a cross section of a further embodiment of a spacer I according to the invention. The embodiment shown in Fig. 3 differs from that shown in Fig. 2 only in that the transition of the side wall 2.1 and the glazing interior wall 3 does not comprise a seventh section 15, which consists of a segment A, and the transition of the side wall 2.2 and the glazing interior wall

[0114] 3 does not comprise an eighth section 16 consisting of a segment A. Instead, the second section 10 extends further to the junction of the side wall 2.1 and the glazing interior wall 3, and the third section 11 extends further to the junction of the side wall 2.2 and the glazing interior wall 3. The side wall 2.1 consists of the second section 10, and the side wall 2.2 consists of the third section 11.

[0115] Fig. 4 shows a cross-section of a further embodiment of a spacer I according to the invention. The embodiment shown in Fig. 4 differs from that shown in Fig. 2 only in that a layer 18 made of the second plastic 8 is arranged on the entire surface 17 of the glazing interior wall 3 on the outside of the cavity 5.

[0116] Fig. 5 shows a cross-section of an embodiment of a spacer II according to the invention. The spacer II shown in Fig. 5 essentially corresponds to the spacer I shown in Fig. 1, wherein, however, the base body 1 in the glazing interior wall 3 has a recess 19 running essentially parallel to the side walls 2.1 and 2.2 for receiving a pane and two cavities 5.1 and 5.2. The bottom of the recess 19 is formed in the embodiment by the outer wall 4. However, it is also possible for the bottom of the recess 19 not to be connected to the outer wall

[0117] 4 and both cavities 5.1 and 5.2 extend below the recess 19.

[0118] The wall thickness of the base body 1 is, for example, 1 mm. This wall thickness also corresponds to the thickness D2 in this embodiment. The width b of the base body 1 along the glazing interior surface 3 is, for example, 25 mm. The total height g of the base body 1 is, for example, 6.5 mm.

[0119] The cavities 5.1 and 5.2 can each accommodate a desiccant (not shown in Fig. 5). Perforations (not shown in Fig. 5) can be provided in the glazing interior wall 3, which create a connection to the interior interpane spaces in the insulating glass unit. The desiccant can then absorb moisture from the interior interpane spaces via the perforations in the glazing interior wall 3.

[0120] The base body 1 of the embodiment of a spacer II according to the invention shown in Fig. 5 is produced by co-extrusion of the first plastic 7 and the second plastic 8.

[0121] Fig. 6 shows a perspective view of a cross section of an embodiment of a spacer I according to the invention. The spacer I shown in Fig. 6 corresponds to the spacer I shown in Fig. 1. Due to the perspective view, the perforations 26 in the glazing interior wall 3 can be seen in Fig. 6.

[0122] Fig. 7 shows a cross-section of the insulating glass unit III according to the invention with a spacer I arranged between a first pane 20 and a second pane 21, which spacer essentially corresponds to that described in Fig. 1, wherein the spacer I used in the insulating glass unit III in Fig. 7 has a barrier film 28. The barrier film 28 is arranged on the outer wall 4, the first connecting wall 6.1 and the second connecting wall 6.2 and on part of the side walls 2.1 and 2.2. The first pane 20, the second pane 21 and the barrier film 28 delimit the outer space 24 between the panes of the insulating glass unit III. The edge 29 of the first pane 20 and the edge 30 of the second pane 21 are arranged at the same height. The secondary sealing agent 25, which contains, for example, a silicone, is arranged in the outer space 24 between the panes.Silicones absorb the forces acting on the edge seal particularly well and thus contribute to the high stability of the insulating glass unit III. The barrier film 28, together with the secondary sealant 25, insulates the inner cavity 23 between the panes and reduces heat transfer from the base body 1 into the inner cavity 23 between the panes. The barrier film 28 can be attached to the base body 1, for example, using PUR hot-melt adhesive. A primary sealant 22 is preferably arranged between the side walls 2.1 and 2.2 and the panes 20, 21. This contains, for example, butyl. The primary sealant 22 overlaps with the barrier film 28 to prevent possible interfacial diffusion. The first pane 20 and the second pane 21 preferably have the same dimensions and thicknesses. The panes preferably have an optical transparency of > 85%.The panes 20, 21 preferably contain glass and / or polymers, preferably flat glass, float glass, quartz glass, borosilicate glass, soda-lime glass, polymethyl methacrylate, and / or mixtures thereof. The first pane 20 and the second pane 21 are, for example, 3 mm thick. In an alternative embodiment, the first pane 20 and / or the second pane 21 can be formed as a laminated glass pane. A desiccant 27, for example a molecular sieve, is arranged within the cavity 5 of the base body 1. This desiccant 27 can be filled into the cavity 5 of the spacer I before assembly of the insulating glass unit III. The glazing interior wall 3 comprises perforations 26 that enable gas exchange with the inner space 23 between the panes.

[0123] The barrier film 28 comprises, for example, a metal-containing barrier layer made of 7 μm thick aluminum, a polymeric layer made of 12 μm thick polyethylene terephthalate (PET), and a metal-containing thin film made of 10 nm thick aluminum. Polyethylene terephthalate is particularly suitable for protecting the 7 μm thick aluminum layer from mechanical damage, since PET films are characterized by particularly high tear resistance. The film layers are arranged, for example, such that the aluminum layers, i.e., the metal-containing barrier layer and the metal-containing thin film, are on the outside. The film is arranged on the base body 1 such that the metal-containing barrier layer faces the outer wall 4. The metal-containing thin film then faces outwards and simultaneously acts as an adhesive layer against the material of the secondary sealant. The metal-containing thin film thus not only fulfills a barrier effect but also acts as an adhesion promoter.

[0124] Fig. 8 shows the flow diagram of a method according to the invention for producing an insulating glass unit III according to the invention. In a first step I, a spacer I or II according to the invention is provided. In a second step II, the spacer I or II is assembled to form a spacer frame. In a third step III, a first pane 20 and a second pane 21 are provided. Alternatively, the third step III can also take place before the first step I. In a fourth step IV, the spacer I or II is fixed between the first pane 20 and the second pane 21 via a primary sealant 22. In a fifth step V, the pane assembly comprising the panes 20, 21 and the spacer I or II is pressed in an insulating glass press. In a sixth step VI, the outer space 24 between the panes is at least partially filled with a secondary sealant 25. List of reference symbols:

[0125] I Spacers

[0126] II Spacers

[0127] III Insulating glass unit

[0128] I Basic body

[0129] 2.1 first side wall

[0130] 2.2 second side wall

[0131] 3 Glazing interior wall

[0132] 4 Exterior wall

[0133] 5 Cavity

[0134] 5.1 Cavity

[0135] 5.2 Cavity

[0136] 6.1 first connecting wall

[0137] 6.2 second connecting wall

[0138] 7 first plastic

[0139] 8 second plastic

[0140] 9 first section

[0141] 10 second section

[0142] II third section

[0143] 12 fourth section

[0144] 13 fifth section

[0145] 14 sixth section

[0146] 15 seventh section

[0147] 16 eighth section

[0148] 17 Surface

[0149] 18 shift

[0150] 19 Deepening

[0151] 20 first disc

[0152] 21 second disc

[0153] 22 primary sealant

[0154] 23 inner space between panes

[0155] 24 outer space between panes

[0156] 25 secondary sealant

[0157] 26 Perforation in the glazing interior wall

[0158] 27 Desiccant 28 Barrier film

[0159] 29 Edge of the first disc

[0160] 30 Edge of the second disc

[0161] X Transverse direction Y Vertical direction

[0162] Z longitudinal direction

[0163] D1 total thickness of the outer wall

[0164] D2 total thickness of the outer wall b width of the polymeric base body along the glazing interior surface g total height of the base body along the pane contact surfaces

Claims

Patent claims 1. A spacer (I) for insulating glass units, comprising at least one base body (1) co-extruded from a first plastic (7) and a second plastic (8), comprising a first side wall (2.1) and a second side wall (2.2) arranged parallel thereto, a glazing interior wall (3) connecting the side walls (2.1, 2.2) to one another; an outer wall (4) arranged substantially parallel to the glazing interior wall (3) and connecting the side walls (2.1, 2.2) directly or via connecting walls (6.1, 6.2); a cavity (5) defined by the side walls (2.1, 2.2), the glazing interior wall (3) and the outer wall (4) or by the side walls (2.1, 2.2), the glazing interior wall (3), the outer wall (4) and the connecting walls (6.1, 6.2).2), wherein the base body (1) is designed as a hollow profile formed from the first plastic (7) and the second plastic (8), which has an alternating arrangement of segments A and segments B, wherein one segment A is formed from the first plastic (7) and one segment B is formed from the second plastic (8), and the segments A and B each extend along a longitudinal direction (Z) of the spacer (I) and adjoin one another in the longitudinal direction (Z), the outer wall (4) comprises a first section (9) which consists of a segment B and is arranged in the middle of the outer wall (4) in a transverse direction (X) of the spacer (I), which is perpendicular to the longitudinal direction (Z) of the spacer (I), and over the entire thickness (D1) of the outer wall (4) in a height direction (Y) of the spacer (I), which is perpendicular to the longitudinal direction (Z) of the spacer (I), the first side wall (2.1) comprises a second section (10) consisting of a segment B, the second side wall (2.2) comprises a third section (11) consisting of a segment B, and the second plastic (8) has a lower thermal conductivity than the first plastic (7).

2. Spacer (I) according to claim 1, wherein the glazing interior wall (3) comprises a fourth section (12) consisting of a segment B.

3. Spacer (I) according to claim 1 or 2, wherein the transition of the side wall (2.1) and the outer wall (4) or the transition of the connecting wall (6.1) and the outer wall (4) comprises a fifth section (13) consisting of a segment A, and the transition of the side wall (2.2) and the outer wall (4) or the transition of the connecting wall (6.2) and the outer wall (4) comprises a sixth section (14) consisting of a segment A.

4. Spacer (I) according to one of claims 1 to 3, wherein the transition of the side wall (2.1) and the glazing interior wall (3) comprises a seventh section (15) consisting of a segment A, and the transition of the side wall (2.2) and the glazing interior wall (3) comprises an eighth section (16) consisting of a segment A.

5. Spacer (I) according to one of claims 1 to 3, wherein the second section (10) extends further to the transition of the side wall (2.1) and the glazing interior wall (3), and the third section (11) extends further to the transition of the side wall (2.2) and the glazing interior wall (3).

6. Spacer (I) according to one of claims 1 to 5, wherein the second section (10) extends further to the transition of the side wall (2.1) and the connecting wall (6.1), and the third section (11) extends further to the transition of the side wall (2.2) and the connecting wall (6.2).

7. Spacer (I) according to one of claims 1 to 3, 5 and 6, wherein the side wall (2.1) consists of the second section (10) and the side wall (2.2) consists of the third section (11).

8. Spacer (I) according to one of claims 1 to 7, wherein a layer (18) made of the second plastic (8) is arranged on the entire surface (17) of the glazing interior wall (3) on the outside of the cavity (5).

9. Spacer (I) according to one of claims 1 to 8, wherein the first plastic (7) is a glass fiber reinforced plastic and the second plastic (8) has a lower glass fiber content than the first plastic (7) or is a glass fiber-free plastic.

10. Spacer (I) according to one of claims 1 to 9, wherein the second plastic (8) is a foamed plastic.

11. Spacer (II) for insulating glass units, at least comprising a base body (1) co-extruded from a first plastic (7) and a second plastic (8), comprising a first side wall (2.1) and a second side wall (2.2) arranged parallel thereto, a glazing interior wall (3) which connects the side walls (2.1, 2.2) to one another, wherein the glazing interior wall (3) has a recess (19) running essentially parallel to the side walls (2.1) and (2.2) for receiving a pane; an outer wall (4) which is arranged essentially parallel to the glazing interior wall (3) and connects the side walls (2.1, 2.2) to one another directly or via connecting walls (6.1, 6.2); Cavities (5.1, 5.2) which are formed by the first side wall (2.1) or the second side wall (2.2), the glazing interior wall (3), the outer wall (4) and the recess (19) or by the first side wall (2.1) or the second side wall (2.2), the glazing interior wall (3), the outer wall (4), the connecting wall (6.1) or the connecting wall (6.2) and the recess (19), wherein the base body (1) is designed as a hollow profile made from the first plastic (7) and the second plastic (8), which has an alternating arrangement of segments A and segments B, wherein a segment A is made from the first plastic (7) and a segment B is made from the second plastic (8), and the segments A and B each extend along a longitudinal direction (Z) of the spacer (II) and are adjacent to one another in the longitudinal direction (Z), the outer wall (4) comprises two first sections (9), each consisting of a segment B and in the middle between the first side wall (2.1) and the second. Side wall (2.2) and the recess (19) are arranged in a transverse direction (X) of the spacer (II), which is perpendicular to the longitudinal direction (Z) of the spacer (II), and over the entire thickness (D2) of the outer wall (4) in a height direction (Y) of the spacer (II), which is perpendicular to the longitudinal direction (Z) of the spacer (II), the first side wall (2.1) comprises a second section (10) which consists of a segment B, the second side wall (2.2) comprises a third section (11) which consists of a segment B, and the second plastic (8) has a lower thermal conductivity than the first plastic (7).

12. A method for producing a spacer (I) according to any one of claims 1 to 10 or a spacer (II) according to claim 11, wherein at least (a) a first nozzle is provided for the extrusion of the first plastic (7); (b) a second nozzle is provided for the extrusion of the second plastic (8); and (c) the first plastic (7) and the second plastic (8) are co-extruded to form the base body (1) in such a way that this base body (1) is designed as the hollow profile formed from the first plastic (7) and the second plastic (8), which has the alternating arrangement of segments A and segments B.

13. Insulating glass unit (III), at least comprising a first pane (20), a second pane (21), a spacer (I) according to one of claims 1 to 10 arranged circumferentially between the first pane (20) and the second pane (21), or a spacer (II) according to claim 11, wherein the first pane (20) is attached to the first side wall (2.1) via a primary sealing means (22), the second pane (21) is attached to the second side wall (2.2) via a primary sealing means (22), the spacer (I) or (II) separates an inner space between the panes (23) from an outer space between the panes (24), and a secondary sealing means (25) is arranged in the outer space between the panes (24).

14. A method for producing an insulating glass unit (III) according to claim 13, wherein at least (a) a spacer (I) according to any one of claims 1 to 10 or a spacer (II) according to claim 11 is provided; (b) the spacer (I) or (II) is assembled to form a spacer frame; (c) a first disc (20) and a second disc (21) are provided; (d) the spacer (I) or (II) is fixed between the first pane (20) and the second pane (21) via a primary sealing means (22); (e) the disc arrangement is pressed together from the discs (20, 21) and the spacer (I) or (II); and (f) the outer space between the panes (24) is at least partially filled with a secondary sealing agent (25).

15. Use of the insulating glass unit (III) according to claim 13 as building interior glazing, building exterior glazing and / or facade glazing.

Images