Segmentation spacers for shielding glass units

Abstract

The present invention provides an improved spacer for a heat-insulating glass unit that has good mechanical performance and improved thermal insulation properties, is economically manufacturable, and is environmentally friendly. [Solution] The present invention relates to a spacer for a shielding glass unit, comprising at least a body co-extruded from first and second plastic materials, the body comprising first and second lateral walls, a glazing inner wall, an outer wall, and a cavity, the body being made of first and second plastic materials and designed as a hollow profile having an alternating arrangement of A and B segments, the A segments being made of the first plastic material and the B segments being made of the second plastic material, the A and B segments being in contact with each other in the longitudinal direction, the outer wall, the first lateral wall, and the second lateral wall each comprising first, second, and third sections, and the second plastic material having a lower thermal conductivity than the first plastic material.

Description

Technical Field

[0001] The present invention relates to a spacer for an insulating glass unit, a method for manufacturing the spacer, an insulating glass unit, a method for manufacturing the insulating glass unit, and the use of the insulating glass unit.

[0002] An insulating glass unit typically includes at least two panes made of glass or a polymeric material. These panes are separated from each other by a gas space or a vacuum space defined by a spacer. The heat insulation ability of insulating glass far exceeds that of single glazing and can be further improved and enhanced by triple glazing or specific coatings. For example, by reducing infrared transmissivity with a silver-containing coating, the temperature drop of a building in winter can be suppressed.

[0003] In addition to the nature and structure of the panes, other elements of the insulating glass unit are also very important. Seals and especially spacers have a great impact on the quality of the insulating glass unit.

[0004] The heat insulation characteristics of an insulating glass unit are greatly influenced by the thermal conductivity of the spacer, especially in the edge bonding region. In the case of a metal spacer, due to the high thermal conductivity of the metal, a thermal bridge is formed at the edge of the pane. On the one hand, heat loss occurs in the edge region of the insulating glass unit due to this thermal bridge, and on the other hand, when the air humidity is high and the outside air temperature is low, condensation occurs on the inner pane in the spacer region. To solve these problems, the use of a so-called "warm edge" system that is thermally optimized is increasing. In this system, the spacer is made of a low-thermal-conductivity material such as plastic.

[0005] From a thermal conductivity standpoint, polymer spacers are preferable to metal spacers. However, polymer spacers have several drawbacks. One is that polymer spacers do not provide sufficient sealing against moisture and gas loss. In this regard, various solutions exist, particularly by applying a barrier film to the outside of the spacer (see, for example, International Publication No. 2013 / 104507).

[0006] On the other hand, the coefficient of thermal expansion of plastic is much larger than that of glass. To equalize the coefficient of thermal expansion, glass fibers can be mixed in (see European Patent Application Publication No. 0852280 and German Patent Application Publication No. 19807454). However, increasing the glass fiber content worsens the thermal conductivity of the spacer, so precise optimization is necessary in this regard. On the other hand, glass fibers or similar fillers improve the longitudinal stiffness of the spacer.

[0007] Polymer-based glass fiber reinforced spacers are extremely brittle and, in contrast to metal spacers, cannot be cold-bent. To manufacture spacer frames for shielding glass units, multiple pieces of spacer must be connected with plug connectors and then bonded or welded. Each connection point must be carefully sealed. One approach to improve flexibility is to incorporate metal strips into the polymer body (see, for example, International Publication No. 2015 / 043848 and German Patent Application Publication No. 19807454). However, incorporating metal strips into the polymer body during manufacturing is extremely difficult.

[0008] Polymer spacers without additional fillers such as glass fibers are flexible and lack sufficient rigidity. However, longitudinal rigidity (related to longitudinal deflection) is important for machinability. Improvement of longitudinal rigidity can be achieved by incorporating metal strips (see above) or by applying metal elements to the outside of the body (see, for example, European Patent No. 1055046 and European Patent Application Publication No. 3241972). However, because metal elements have high thermal conductivity, the application of metal strips adversely affects the thermal conductivity of the spacer. A particular difficulty in applying individual metal elements to the outside is achieving complete sealing of the edge seals against moisture intrusion.

[0009] Considering the above, spacer design means finding a compromise between mechanical performance and thermal insulation properties. This is because materials that exhibit very good thermal performance tend to have poor mechanical performance, and vice versa.

[0010] International Publication No. 2021 / 009176 describes a combination of different materials with different properties in a spacer manufactured by co-extrusion, where these different materials are arranged coaxially within the spacer. In particular, a first plastic material and a second plastic material are used, the second plastic material having lower thermal conductivity and higher flexibility than the first plastic material, the body of the spacer is designed as a hollow profile formed from the second plastic material, and the first plastic material is placed inside this hollow profile, at least partially directly adjacent to it. However, this does not reliably prevent heat exchange between the inner first plastic material and the pane, and therefore it is not possible to achieve a spacer with the lowest possible thermal conductivity.

[0011] German Patent Application Publication No. 102011009359 discloses a spacer profile having a hollow profile body made of a first plastic material and a diffusion barrier region made of a second plastic material containing a layered silicate, wherein the diffusion barrier is formed by designing this diffusion barrier region to be at least part of the outer wall. However, even with the placement of a diffusion barrier region made of a second plastic material containing a layered silicate, it is not possible to ensure low thermal conductivity along the outer wall of the spacer. [Overview of the Initiative] [Problems that the invention aims to solve]

[0012] In view of the prior art described above, the present invention aims to provide an improved spacer that has good mechanical performance and improved thermal insulation properties, is economically manufacturable, and is environmentally friendly. [Means for solving the problem]

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

[0014] A method for manufacturing a spacer according to the present invention, a shielding glass unit according to the present invention, a method for manufacturing a shielding glass unit according to the present invention, and a use of the shielding glass unit according to the present invention are evident from further independent claims.

[0015] A spacer according to the present invention for a shielding glass unit, according to a first embodiment, comprises at least a body co-extruded from a first plastic material and a second plastic material, the body comprising a first lateral wall, a second lateral wall positioned parallel to the first lateral wall, a glazing interior wall connecting these lateral walls to each other, an outer wall positioned substantially parallel to the glazing interior wall and connecting these lateral walls to each other directly or via connecting walls, and a cavity enclosed by the lateral wall, the glazing interior wall and the outer wall, or enclosed by the lateral wall, the glazing interior wall, the outer wall and the connecting wall, the body being designed as a hollow profile, the hollow profile being formed from the first plastic material and the second plastic material, and A-segment and B-segment The spacer has an alternating arrangement of segments, with segment A being formed from a first plastic material and segment B being formed from a second plastic material, and segments A and B each extending along the longitudinal direction Z of the spacer and in contact with each other in the longitudinal direction Z, the outer wall includes a first section, the first section is made of segment B, and is located in the center of the outer wall in the lateral direction X of the spacer perpendicular to the longitudinal direction Z of the spacer, and across the entire thickness D1 of the outer wall in the longitudinal direction Y of the spacer perpendicular to the longitudinal direction Z of the spacer, the first lateral wall includes a second section made of segment B, the second lateral wall includes a third section made of segment B, and the second plastic material has a lower thermal conductivity than the first plastic material.

[0016] The first and second side walls represent the surfaces of the spacers to which the outer pane of the shielding glass unit is attached when the spacers are installed. The first and second side walls extend parallel to each other.

[0017] The outer wall of the main body is the wall located on the opposite side of the glazing interior wall and facing from the inside of the shielding glass unit (the space between the inner panes) towards the space between the outer panes. Preferably, the outer wall extends approximately perpendicular to the lateral wall.

[0018] Preferably, the arbitrary first connecting wall and the arbitrary second connecting wall extend with respect to the outer wall at an angle α (alpha) of 30° to 60°. The inclined shape of the first and second connecting walls improves the stability of the main body and enables better coupling and disconnection of the spacer according to the present invention.

[0019] The main body preferably has a width of 5 mm to 80 mm, more preferably 10 mm to 20 mm, along the glazing interior wall. In the spirit of the present invention, width refers to the dimension extending between the side walls. Width refers to the distance between the non-facing surfaces of two side walls. The distance between panes of the shielding glass unit is determined by the selection of the width of the glazing interior wall. The exact dimensions of the glazing interior wall depend on the dimensions of the shielding glass unit and the desired size of the space between panes.

[0020] The main body preferably has a height of 5 mm to 15 mm, particularly preferably 5 mm to 10 mm, along the side walls. Within this height range, the spacer has advantageous stability and, advantageously, is less conspicuous within the shielding glass unit. Furthermore, the cavity of the spacer has an advantageous size for accommodating an appropriate amount of desiccant. The height of the spacer is the distance between the surfaces of the outer walls that do not face each other and the surfaces of the glazing inner walls.

[0021] The glazing interior walls, exterior walls, connecting walls, and lateral walls preferably have a thickness of 0.5 mm to 1.5 mm, and particularly preferably 0.8 mm to 1.0 mm. According to one embodiment, the glazing interior walls, exterior walls, connecting walls, and lateral walls have a uniform thickness. According to a further embodiment, the glazing interior walls, exterior walls, connecting walls, and / or lateral walls have different thicknesses. For example, areas of the body exposed to high mechanical stress may have a greater thickness than areas of the body that are more thermally important. In particular, according to one preferred embodiment, the glazing interior walls and exterior walls have a smaller thickness than the lateral walls and connecting walls. The total thickness of the exterior wall of the spacer according to the first embodiment is represented as D1 according to the present invention. As used herein, "total thickness" means the total cross-section of the exterior wall in the longitudinal direction Y.

[0022] The desiccant can be placed within the spacer cavity. Furthermore, perforations can be provided in the inner wall of the glazing to establish a connection to the inner inter-pane space in the shielding glass unit. In this case, the desiccant present in the cavity can absorb moisture from the inner inter-pane space through the perforations in the inner wall of the glazing.

[0023] According to one preferred embodiment, the desiccant is selected from silica gel, molecular sieves, CaCl2, Na2SO4, activated carbon, silicate, bentonite, zeolite, and / or mixtures thereof. The desiccant can be filled immediately before the assembly of the shielding glass unit. This ensures particularly high absorption capacity of the desiccant within the completed shielding glass unit. The glazing interior wall preferably has openings / perforations that allow the desiccant contained within the body to absorb atmospheric humidity.

[0024] According to the present invention, the body of the spacer is a body co-extruded from a first plastic material and a second plastic material; that is, the body is manufactured by co-extrusion molding of the first plastic material and the second plastic material.

[0025] The spacer according to the present invention has a lateral direction X, a longitudinal direction Y, and a longitudinal direction Z, which are orthogonal to each other. The longitudinal direction Z is the extending direction of the spacer. According to the present invention, the A segment and the B segment each extend along the longitudinal direction Z of the spacer and are in contact with each other in the longitudinal direction Z. The lateral direction X of the spacer extends parallel to the inner wall of the glazing and the outer wall of the spacer. The longitudinal direction Y of the spacer extends parallel to the side wall of the spacer.

[0026] In the present invention, the "alternating arrangement" of the A segment and the B segment means that the A and B segments are alternately arranged along the cavity in the cross-sectional view of the main body. This alternating arrangement of the A and B segments can achieve good heat insulation performance of the spacer. This is because the B segment formed from the second plastic material having a lower thermal conductivity is at least partially arranged along the cavity, and this B segment separates each region of the spacer formed from the A segment made of the first plastic material having a higher thermal conductivity from each other.

[0027] According to the present invention, the A segment is formed from the first plastic material, and the B segment is formed from the second plastic material. Further, the second plastic material has a lower thermal conductivity than the first plastic material.

[0028] Preferably, the second plastic material has a thermal conductivity at least 5%, particularly preferably at least 10%, more preferably at least 20% lower than that of the first plastic material.

[0029] According to one embodiment, the second plastic material has a lower rigidity than the first plastic material. Preferably, the second plastic material has a rigidity at least 5%, particularly preferably at least 10%, most preferably at least 30% lower than that of the first plastic material.

[0030] By combining two plastic materials having different properties in terms of thermal conductivity and, optionally, rigidity, the specific position of the spacer body can be optimized thermally, or thermally and mechanically.

[0031] In a preferred embodiment of the spacer according to the present invention, the first plastic material is a glass fiber reinforced plastic material, and the second plastic material is a plastic material with a lower glass fiber content than the first plastic material, or a plastic material that does not contain glass fibers. Preferably, the glass fiber content of the glass fiber reinforced plastic material is 10% to 40%, particularly 25% to 40%.

[0032] According to one embodiment, the second plastic material is a foamed plastic material, which can improve the thermal properties of the spacer. In a further embodiment of the spacer according to the present invention, both the first plastic material and the second plastic material are foamed plastic materials, and the first plastic material is a glass fiber reinforced plastic material.

[0033] The first and second plastic materials may be plastic materials based on the same polymer or copolymer. However, it is also possible for the first and second plastic materials to be based on different polymers or copolymers. Preferably, the first and second plastic materials are based on the same polymer or copolymer. This makes it particularly easy to achieve a stable connection between segment A and segment B.

[0034] The first plastic material and the second plastic material independently include, 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 material and the second plastic material independently include polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), styrene-acrylonitrile copolymer (SAN), acrylonitrile-butadiene-styrene copolymer (ABS), and / or copolymers or mixtures thereof.

[0035] In one embodiment, the first plastic material is glass fiber reinforced PP, and the second plastic material is not glass fiber reinforced PP.

[0036] In one preferred embodiment, the first plastic material is glass fiber reinforced SAN, and the second plastic material is not glass fiber reinforced SAN.

[0037] In another preferred embodiment, the first plastic material is glass fiber reinforced ABS, and the second plastic material is unreinforced ABS.

[0038] In another preferred embodiment, the first plastic material is glass fiber reinforced ABS, and the second plastic material is glass fiber unreinforced TPU.

[0039] According to the present invention, the outer wall includes a first section consisting of B segments, the first section being positioned in the center of the outer wall in the lateral direction X of the spacer and across the entire thickness D1 of the outer wall in the longitudinal direction Y of the spacer. This arrangement of the first section according to the present invention ensures good thermal insulation along the outer wall. This is particularly advantageous when the spacer is used in a thermal insulation glass unit, because it significantly reduces or prevents heat transfer between the first pane and the second pane where the outer wall is located.

[0040] According to the present invention, the first section is positioned in the center of the outer wall in the lateral direction X of the spacer. This means that, when viewed from the hollow profile, the first section extends symmetrically outward in both directions from a center line that bisects the outer wall. In this specification, "symmetrical" means that the two sections of the first section extending in both directions from the center line are approximately the same length. This symmetrical arrangement of the first section ensures that when pressure is applied to the spacer, the pressure is evenly distributed, and that the shape of the spacer does not become distorted during the manufacturing process.

[0041] In one embodiment, the first section extends over at least 20%, preferably at least 30%, more preferably at least 40%, and even more preferably at least 45% of the outer wall in the lateral direction X of the spacer. The higher the proportion of the outer wall occupied by the first section, the stronger the thermal insulation along the outer wall. In one embodiment, the first section extends over up to 95%, preferably up to 90%, more preferably up to 80%, and even more preferably up to 75% of the outer wall in the lateral direction X of the spacer. This ensures that the outer wall has sufficiently high thermal insulation properties. In one embodiment, at least 5%, preferably at least 10%, more preferably at least 20%, and even more preferably at least 25% of the total outer wall in the lateral direction X of the spacer has sections formed from the first plastic material. According to this embodiment, the outer wall has sufficiently high thermal insulation properties. Preferably, the outer wall includes two sections formed from the first plastic material, with the first section positioned between them.

[0042] According to the present invention, the first side wall includes a second section consisting of a B-segment. The arrangement of this second section according to the present invention ensures good thermal insulation along the first side wall. This is particularly advantageous when a spacer is used in the insulating glass unit, because the first side wall is connected to the first pane of the insulating glass unit, and the arrangement of the second section prevents or reduces heat transfer between the first pane and the spacer.

[0043] According to one embodiment, the second section is arranged along the entire thickness of the first side wall, thereby enabling good thermal insulation characteristics to be achieved along the first side wall in this region.

[0044] In one embodiment of the present invention, the second section further extends to the transition between the first lateral wall and the first connecting wall. According to a further embodiment, the second section further extends to the transition between the first lateral wall and the glazing interior wall. These embodiments allow the spacer to have good thermal insulation properties in this region.

[0045] According to a further embodiment, the first lateral wall comprises a second section, thereby achieving the best possible thermal insulation along the entire contact surface with the first pane.

[0046] According to the present invention, the second side wall includes a third section consisting of a B-segment. The arrangement of this third section according to the present invention ensures good thermal insulation along the second side wall. This is particularly advantageous when a spacer is used in the insulating glass unit, because the second side wall is connected to the second pane of the insulating glass unit, and as a result, the arrangement of the third section can prevent or reduce heat transfer between the second pane and the spacer.

[0047] According to one embodiment, the third section is arranged along the entire thickness of the second side wall, thereby enabling good thermal insulation characteristics to be achieved along the second side wall in this region.

[0048] In one embodiment of the present invention, the third section further extends to the transition between the second lateral wall and the second connecting wall. According to a further embodiment, the third section further extends to the transition between the second lateral wall and the glazing interior wall. These embodiments allow the spacer to have good thermal insulation properties in this region.

[0049] According to a further embodiment, the second lateral wall comprises a third section, thereby achieving the best possible thermal insulation along the entire contact surface with the second pane.

[0050] In one embodiment of the present invention, the glazing interior wall includes a fourth section consisting of B segments. By using the fourth section, good thermal insulation can be ensured along the glazing interior wall. This is particularly advantageous when spacers are used in the insulating glass unit, because this significantly reduces or prevents heat transfer between the first pane and the second pane in which the glazing interior wall is located.

[0051] According to one embodiment of the present invention, the fourth section is positioned in the center of the glazing interior wall in the lateral direction X of the spacer. This means that, when viewed from the hollow profile, the fourth section extends symmetrically outward in both directions from a center line that bisects the glazing interior wall. In this specification, “symmetrical” means that the two sections of the fourth section extending in both directions from the center line are approximately the same length. This symmetrical arrangement of the fourth section allows the pressure to be evenly distributed when pressure is applied to the spacer, preventing distortion of the spacer’s shape during the manufacturing process.

[0052] In one embodiment, the fourth section extends over at least 20%, preferably at least 30%, more preferably at least 40%, and even more preferably at least 45% of the glazing interior wall in the lateral X direction of the spacer. The higher the proportion of the fourth section in the glazing interior wall, the stronger the thermal insulation along the glazing interior wall. In one embodiment, the fourth section extends over up to 95%, preferably up to 90%, more preferably up to 80%, and even more preferably up to 75% of the glazing interior wall in the lateral X direction of the spacer. This ensures that the glazing interior wall has sufficiently high thermal insulation properties. In one embodiment, at least 5%, preferably at least 10%, more preferably at least 20%, and even more preferably at least 25% of the total glazing interior wall in the lateral X direction of the spacer has sections formed from the first plastic material. According to this embodiment, the glazing interior wall has sufficiently high thermal insulation properties. Preferably, the glazing interior wall includes two sections formed from the first plastic material, with the fourth section positioned between them.

[0053] According to one embodiment, the fourth section is arranged along the entire thickness of the glazing interior wall, thereby enabling good thermal insulation characteristics to be achieved along the glazing interior wall in this region.

[0054] In one embodiment, the transition between the first lateral wall and the outer wall, or the transition between the first connecting wall and the outer wall, includes a fifth section consisting of A segments. Preferably, the fifth section starts from the transition and extends to the first lateral wall and the outer wall, or to the first connecting wall and the outer wall. This further distributes the forces acting due to the load in the area of ​​the fifth section.

[0055] In one embodiment, the transition between the second lateral wall and the outer wall, or the transition between the second connecting wall and the outer wall, includes a sixth section consisting of A segments. Preferably, the sixth section starts from the transition and extends to the second lateral wall and the outer wall, or to the second connecting wall and the outer wall. This further distributes the forces acting due to the load in the area of ​​the sixth section.

[0056] In one embodiment, the transition between the first lateral wall and the glazing interior wall includes a seventh section consisting of A segments. Preferably, the seventh section starts from the transition and extends to the first lateral wall and the glazing interior wall. This further distributes the forces acting due to the load in the area of ​​the seventh section.

[0057] According to one embodiment of the present invention, the transition between the second lateral wall and the glazing interior wall includes an eighth section consisting of A segments. Preferably, the eighth section starts from the transition and extends to the second lateral wall and the glazing interior wall. This further distributes the forces acting due to the load in the area of ​​the eighth section.

[0058] In one embodiment, the body includes at least eight sections, preferably exactly eight sections. The presence of multiple sections allows for particularly good tuning of the spacer's properties, especially with respect to thermal insulation and, if necessary, mechanical performance. Preferably, the body consists of four A segments and four B segments.

[0059] According to one embodiment, the body further includes at least one section inside and / or outside the cavity, which is formed from a first plastic material and / or a second plastic material. For example, a layer formed from the second plastic material may be placed over the entire surface of the glazing inner wall on the outside of the cavity. This layer can be recognized by an observer when the spacer is installed in the shielding glass unit. For example, by using a glass fiber-free plastic material as the second plastic material, a smooth surface with a high-gloss effect can be obtained. Alternatively or additionally, the second plastic material may include a pigment that colors the second plastic material. By using such a colored second plastic material in the layer, the spacer can be recognized as colored by an external observer without the need to include the pigment throughout the entire spacer, thereby making the spacer more cost-effective and environmentally friendly overall. When the above layer is used, the first and second plastic materials forming the body, other than this layer, are not visible from the outside and therefore do not need to meet high optical requirements. Therefore, the first and second plastic materials of the main body, other than this layer, may independently include or consist of recycled materials. According to a further embodiment, the entire body has a layer formed from the second plastic material on the outside of the cavity. This can further improve the thermal insulation of the spacer. Alternatively or additionally, the entire body may further have a layer formed from the first plastic material on the inside of the cavity.

[0060] In one embodiment, the spacer has a barrier film. The barrier film is preferably positioned on the outer wall, any first connecting wall, and any second connecting wall, and at least on a portion of the lateral wall. The barrier film can be attached to the body with an adhesive, for example. The barrier film includes, for example, a 7 μm thick aluminum metal-containing barrier layer, a 12 μm thick polyethylene terephthalate (PET) polymer layer, and a 10 nm thick aluminum metal-containing thin layer. Polyethylene terephthalate is particularly suitable for protecting the 7 μm thick aluminum layer from mechanical damage, because the PET film is characterized by particularly high tear resistance. The film layers are arranged, for example, so that the aluminum layer, i.e., the metal-containing barrier layer and the metal-containing thin layer, is on the outside. The film is preferably positioned on the body so that the metal-containing barrier layer faces the outer wall. In this case, the metal-containing thin layer faces outward and simultaneously functions as an adhesive layer to the secondary sealant material. Thus, the metal-containing thin layer not only has a barrier effect but also functions as an adhesion promoter. The barrier film may include a foamed polymer layer to further improve its thermal properties.

[0061] According to a second aspect of the present invention, a spacer for a shielding glass unit comprises at least a body co-extruded from a first plastic material and a second plastic material, the body comprising a first lateral wall, a second lateral wall positioned parallel to the first lateral wall, a glazing interior wall connecting these lateral walls to each other, the glazing interior wall having recesses extending substantially parallel to these lateral walls for accommodating panes, an outer wall positioned substantially parallel to the glazing interior wall and connecting these lateral walls directly or via connecting walls, and a plurality of cavities, each cavity being surrounded by the first lateral wall and the second lateral wall, the glazing interior wall, the outer wall, and a recess, or each cavity being surrounded by the first lateral wall and the second lateral wall, the glazing interior wall, the outer wall, a first connecting wall and a second connecting wall, and a recess, the body comprising a hollow profile The hollow profile is formed from a first plastic material and a second plastic material and has an alternating arrangement of A segments and B segments, the A segments being formed from the first plastic material and the B segments being formed from the second plastic material, the A and B segments each extending along the longitudinal direction Z of the spacer and in contact with each other in the longitudinal direction Z, the outer wall includes two first sections, each of the two first sections consisting of a B segment, and is positioned in the center between the first and second side walls and the recess in the lateral direction X of the spacer perpendicular to the longitudinal direction Z of the spacer, and over the entire thickness D2 of the outer wall in the longitudinal direction Y of the spacer perpendicular to the longitudinal direction Z of the spacer, the first side wall includes a second section consisting of a B segment, the second side wall includes a third section consisting of a B segment, and the second plastic material has a lower thermal conductivity than the first plastic material.

[0062] The embodiments and definitions described above in relation to the spacer according to the first aspect of the present invention also apply to the spacer according to the second aspect of the present invention, unless otherwise explicitly provided.

[0063] The body of the spacer according to the second embodiment preferably has a width of 5 mm to 80 mm, preferably 10 mm to 35 mm, along the inner wall of the glazing.

[0064] The total thickness of the outer wall of the spacer according to the second embodiment is denoted as D2 according to the present invention. In this specification, "total thickness" means the total cross-section of the outer wall in the longitudinal direction Y.

[0065] According to the present invention, the outer wall of the spacer according to the second embodiment includes two first sections, each of which consists of a B-segment and is positioned in the center between the first and second lateral walls and the recess in the lateral direction X of the spacer, and across the entire thickness D2 of the outer wall in the longitudinal direction Y of the spacer. The arrangement of these first sections according to the present invention ensures good thermal insulation along the outer wall. This is particularly advantageous when the spacer is used in a shielding glass unit, because it significantly reduces or prevents heat transfer between the first pane and the second pane where the outer wall is located.

[0066] According to the present invention, these first sections are, according to a second embodiment, positioned in the center between the first and second lateral walls and the recess in the lateral direction X of the spacer, respectively. This means that, when viewed from the hollow profile, the first sections extend symmetrically outward in both directions from a centerline that bisects the outer wall between the first and second lateral walls and the recess, respectively. In this specification, “symmetrical” means that the two sections of each first section extending in both directions from the centerline are approximately the same length. This symmetrical arrangement of each first section ensures that when pressure is applied to the spacer, the pressure is evenly distributed, and that the shape of the spacer does not become distorted during the manufacturing process.

[0067] According to a second embodiment, the desiccant can be placed in each cavity of the spacer. Furthermore, perforations can be provided in the inner wall of the glazing to establish connections to the inner inter-pane space in the shielding glass unit. In this case, the desiccant present in these cavities can absorb moisture from the inner inter-pane space through the perforations in the inner wall of the glazing.

[0068] According to the present invention, the body of the spacer according to the second embodiment has a recess. This recess extends substantially parallel to the lateral wall and is suitable for accommodating a pane. The bottom of the recess is preferably formed by the outer wall. As a result, the maximum possible depth of the recess is obtained and the area of ​​the lateral portion of the recess for stabilizing the pane accommodated in the recess is maximized. According to an alternative embodiment, the bottom of the recess does not abut the outer wall, and both cavities extend downwards from the recess.

[0069] The present invention relates to a method for manufacturing a spacer according to the present invention, and at least, (a) Provide a first nozzle for extruding a first plastic material, (b) Provide a second nozzle for extruding a second plastic material, (c) A body is formed by co-extrusion molding of a first plastic material and a second plastic material, thereby the body is configured as a hollow profile, the hollow profile is formed from the first plastic material and the second plastic material and has an alternating arrangement of A segments and B segments. This includes further methods.

[0070] Step (b) can also be performed before step (a).

[0071] There are no particular limitations on the first and second nozzles. Conventional nozzles for extruding plastic materials, as known to those skilled in the art, can be used.

[0072] The present invention further includes a shielding glass unit, the shielding glass unit comprising at least a first pane, a second pane, and a spacer according to the present invention disposed around the periphery between the first pane and the second pane, wherein the first pane is attached to a first lateral wall by primary sealant, the second pane is attached to a second lateral wall by primary sealant, and the spacer separates an inner inter-pane space from an outer inter-pane space, with a secondary sealant disposed in the outer inter-pane space.

[0073] This means that the primary sealant is located between the first lateral wall and the first pane, and between the second lateral wall and the second pane. The primary sealant is in contact with the lateral wall or barrier film, which may optionally be attached to the lateral wall, any connecting wall, and outer wall of the body. The first and second panes are arranged parallel, preferably congruently. Thus, the edges of the two panes are flush in the edge region, i.e., at the same height. The inner inter-pane space is defined by the first and second panes and the glazing inner wall. The outer inter-pane space is defined as the space defined by the first pane, the second pane, and any barrier film or outer wall on the outer wall of the body. The outer inter-pane space is at least partially filled with secondary sealant. The secondary sealant contributes to the mechanical stability of the shielding glass unit and absorbs some of the climatic load acting on the edge joints.

[0074] In a preferred embodiment of the barring glass unit according to the present invention, when a barrier film is present, the primary sealant extends to the regions of the first and second lateral walls adjacent to the glazing inner wall, where the barrier film is not present. Thus, the primary sealant covers the transition between the body and the barrier film, thereby achieving a particularly good seal of the barring glass unit. In this way, the diffusion of moisture into the spacer cavity is reduced where the barrier film is adjacent to the plastic (interfacial diffusion is reduced).

[0075] In a further preferred embodiment of the insulated glass unit according to the present invention, the secondary sealant is applied along the first and second panes, and the secondary sealant is absent in the central region of the outer wall. The central region refers to a region located centrally relative to the two outer panes, in contrast to the two outer regions adjacent to the first and second panes of the outer wall. In this way, good stabilization of the insulated glass unit is achieved while saving on the material cost of the secondary sealant. At the same time, this arrangement can be easily manufactured by applying two strands of secondary sealant to the outer wall of the outer region adjacent to the outer panes.

[0076] In a further preferred embodiment, the secondary sealant is applied so as to completely fill the entire interpane space on the outside. This ensures maximum stabilization of the shielding glass unit.

[0077] The secondary sealant preferably comprises a polymer or a silane-modified polymer, and particularly preferably an organic polysulfide, silicone, room-temperature crosslinked (RTV) silicone rubber, peroxide crosslinked silicone rubber and / or addition crosslinked silicone rubber, polyurethane and / or butyl rubber. These sealants have a particularly good stabilizing effect.

[0078] The primary sealant preferably contains polyisobutylene. The polyisobutylene may be crosslinked polyisobutylene or non-crosslinked polyisobutylene.

[0079] The first and second panes of the shielding glass unit preferably comprise glass, ceramic and / or polymer, and particularly preferably quartz glass, borosilicate glass, soda-lime glass, polymethyl methacrylate, or polycarbonate.

[0080] According to one embodiment, the first pane and the second pane each have a thickness of 2 mm to 50 mm, preferably 3 mm to 16 mm, and these two panes may have different thicknesses.

[0081] In a preferred embodiment of the shielding glass unit according to the present invention, the spacer frame consists of one or more spacers according to the present invention. For example, the spacer frame may be formed by bending one spacer according to the present invention to form a complete frame. Alternatively, the spacer frame may consist of multiple spacers according to the present invention connected to each other via one or more plug connectors. The plug connectors may be designed as longitudinal connectors or corner connectors. Such corner connectors may be designed, for example, as plastic molded parts with seals, in which two spacers with miter cuts abut.

[0082] In principle, a variety of geometries are possible for the shielding glass unit, such as rectangular, trapezoidal, and rounded shapes. To generate a rounded geometry, the spacer according to the present invention can be bent, for example, while heated.

[0083] In a further embodiment, the shielding glass unit comprises three or more panes. In this case, the spacer may include, for example, a plurality of recesses, in which at least one additional pane is positioned. It is also possible to form the plurality of panes as a single laminated glass pane.

[0084] The present invention relates to a method for manufacturing a shielding glass unit according to the present invention, and comprises at least, (a) Provide a spacer according to the present invention, (b) Assemble the spacers to form the spacer frame, (c) Provide a first pane and a second pane, (d) The spacer is fixed between the first pane and the second pane with primary sealant, (e) The pane structure, which consists of these panes and spacers, is subjected to pressure treatment. (f) Fill the outer interpane space with secondary sealant at least partially. This includes further methods.

[0085] The shielding glass unit is automatically manufactured using a multi-layer glazing system known to those skilled in the art. First, a spacer frame including spacers according to the present invention is provided. For example, the spacer frame is manufactured by welding, bonding and / or plug connectors. A first pane and a second pane are provided, and the spacer frame is fixed between the first and second panes by primary sealant. The spacer frame is positioned such that the first side wall of the spacer is located on the first pane and fixed by primary sealant. Next, the second pane is positioned jointly with the first pane on the second side wall of the spacer and similarly fixed by primary sealant, and the pane structure is pressurized. The outer inter-pane space is at least partially filled with secondary sealant. Thus, the present method according to the present invention enables the simple and cost-effective manufacture of shielding glass units. Due to the design of the spacers according to the present invention, existing conventional machines for spacers known from the prior art can be used, and no special new machines are required.

[0086] It is also possible to provide the first and second panes before providing the spacer frame.

[0087] As described above, when providing a spacer frame, the body of the spacer is manufactured by co-extrusion molding of a first plastic material and a second plastic material.

[0088] The present invention further includes the use of the insulating glass unit according to the present invention as interior glazing, exterior glazing, and / or facade glazing for buildings.

[0089] Various embodiments of the present invention can be implemented individually or in any combination. In particular, the features described above and those described below are not limited to the combinations described and can be used in other combinations or individually, as long as they do not depart from the scope of the present invention.

[0090] The present invention will be described in further detail below with reference to the drawings and embodiments. The drawings are schematic representations and are not to actual scale. The drawings do not limit the present invention in any way. [Brief explanation of the drawing]

[0091] [Figure 1] This figure shows a cross-section of one embodiment of the spacer I according to the present invention. [Figure 2] This figure shows a cross-section of another embodiment of the spacer I according to the present invention. [Figure 3] This figure shows a cross-section of another embodiment of the spacer I according to the present invention. [Figure 4] This figure shows a cross-section of another embodiment of the spacer I according to the present invention. [Figure 5] This figure shows a cross-section of one embodiment of spacer II according to the present invention. [Figure 6] This figure shows a cross-sectional perspective view of one embodiment of the spacer I according to the present invention. [Figure 7] This figure shows a cross-section of one embodiment of the shielding glass unit III according to the present invention. [Figure 8] This figure shows a flowchart of the method according to the present invention. [Modes for carrying out the invention]

[0092] Figure 1 shows a cross-section of one embodiment of spacer I according to the present invention. In the embodiment shown in Figure 1, spacer I includes a body 1, which is formed from a first lateral wall 2.1, a second lateral wall 2.2 arranged parallel to the first lateral wall 2.1, 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 lateral wall 2.1 and the second lateral wall 2.2 are connected to each other 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 lateral wall 2.1 via the first connecting wall 6.1 and to the second lateral 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, and the first lateral wall 2.1 and the second lateral wall 2.2 may be directly connected to the outer wall 4. The cavity 5 is surrounded by a first lateral wall 2.1, a glazing inner wall 3, a second lateral wall 2.2, a first connecting wall 6.1, a second connecting wall 6.2, and an outer wall 4. Preferably, the connecting walls 6.1 and 6.2 extend from the outer wall 4 at an angle α (alpha) of 30° to 60°. The inclined shape of the first connecting wall 6.1 and the second connecting wall 6.2 improves the stability of the main body and enables better coupling and disconnection of the spacer I according to the present invention.

[0093] The main body 1 is designed as a hollow profile, which is formed from a first plastic material 7 and a second plastic material 8, and has an alternating arrangement of A segments and B segments, where the A segments are formed from the first plastic material 7 and the B segments are formed from the second plastic material 8, and the A and B segments each extend along the longitudinal direction Z of the spacer I and are in contact with each other in the longitudinal direction Z.

[0094] The outer wall 4 includes a first section 9 consisting of B segments, the first section 9 being located in the center of the outer wall 4 in the lateral direction X of the spacer I and across the entire thickness D1 of the outer wall 4 in the longitudinal direction Y of the spacer I.

[0095] The first lateral wall 2.1 includes a second section 10 consisting of B segments, and the second lateral wall 2.2 includes a third section 11 consisting of B segments.

[0096] The transition between the first connecting wall 6.1 and the outer wall 4 includes a fifth section 13 consisting of A segments, and the transition between the second connecting wall 6.2 and the outer wall 4 includes a sixth section 14 consisting of A segments.

[0097] The transition between the lateral wall 2.1 and the glazing interior wall 3 includes a seventh section 15 made of A segments, and the transition between the lateral wall 2.2 and the glazing interior wall 3 includes an eighth section 16 made of A segments. The seventh section 15 and the eighth section 16 are connected via the glazing interior wall 3 made of A segments. This means that the A segments extend integrally throughout the entire glazing interior wall 3, including the seventh section 15 and the eighth section 16.

[0098] The wall thickness of the main body 1 is, for example, 1 mm. In this embodiment, the wall thickness also corresponds to the thickness D1. The width b of the main body 1 along the glazing inner surface 3 is, for example, 12 mm. The total height g of the main body 1 is, for example, 6.5 mm.

[0099] The first plastic material 7 is, for example, acrylonitrile-butadiene-styrene copolymer (ABS) with a glass fiber content of 40%, and the second plastic material 8 is, for example, the same acrylonitrile-butadiene-styrene copolymer (ABS), but without glass fibers.

[0100] Cavity 5 can accommodate a desiccant (not shown in Figure 1). The inner glazing wall 3 may be provided with perforations (not shown in Figure 1) that establish a connection to the inner inter-pane space in the shielding glass unit. The desiccant can absorb moisture from the inner inter-pane space through the perforations in the inner glazing wall 3.

[0101] The body 1 of the embodiment of the spacer I according to the present invention shown in Figure 1 is manufactured by co-extrusion molding of a first plastic material 7 and a second plastic material 8.

[0102] Figure 2 shows a cross-section of another embodiment of the spacer I according to the present invention. The embodiment shown in Figure 2 differs from the embodiment shown in Figure 1 only in that the glazing interior wall 3 includes a fourth section 12 consisting of B segments.

[0103] Figure 3 shows a cross-section of another embodiment of the spacer I according to the present invention. The embodiment shown in Figure 3 differs from the embodiment shown in Figure 2 only in that the transition between the lateral wall 2.1 and the glazing interior wall 3 does not include a seventh section 15 consisting of A segments, and the transition between the lateral wall 2.2 and the glazing interior wall 3 does not include an eighth section 16 consisting of A segments. Instead, the second section 10 extends further to the transition between the lateral wall 2.1 and the glazing interior wall 3, and the third section 11 extends further to the transition between the lateral wall 2.2 and the glazing interior wall 3. The lateral wall 2.1 consists of the second section 10, and the lateral wall 2.2 consists of the third section 11.

[0104] Figure 4 shows a cross-section of another embodiment of the spacer I according to the present invention. The embodiment shown in Figure 4 differs from the embodiment shown in Figure 2 only in that a layer 18 formed from the second plastic material 8 is placed on the entire surface 17 of the outer glazing inner wall 3 of the cavity 5.

[0105] Figure 5 shows a cross-section of one embodiment of Spacer II according to the present invention. Spacer II shown in Figure 5 substantially corresponds to Spacer I shown in Figure 1, except that the main body 1 has a recess 19 in the glazing inner wall 3 that extends substantially parallel to the lateral walls 2.1 and 2.2 for accommodating panes, and two cavities 5.1 and 5.2. In this embodiment, the bottom of the recess 19 is formed by the outer wall 4. However, it is also possible that the bottom of the recess 19 does not abut the outer wall 4, and both cavities 5.1 and 5.2 extend below the recess 19.

[0106] The wall thickness of the main body 1 is, for example, 1 mm. In this embodiment, the wall thickness also corresponds to the thickness D2. The width b of the main body 1 along the glazing inner surface 3 is, for example, 25 mm. The total height g of the main body 1 is, for example, 6.5 mm.

[0107] Cavities 5.1 and 5.2 can each accommodate a desiccant (not shown in Figure 5). The inner glazing wall 3 may be provided with perforations (not shown in Figure 5) that establish connections to the inner inter-pane space in the shielding glass unit. The desiccant can absorb moisture from the inner inter-pane space through the perforations in the inner glazing wall 3.

[0108] The main body 1 of the embodiment of spacer II according to the present invention shown in Figure 5 is manufactured by co-extrusion molding of a first plastic material 7 and a second plastic material 8.

[0109] Figure 6 shows a cross-sectional perspective view of one embodiment of the spacer I according to the present invention. The spacer I shown in Figure 6 corresponds to the spacer I shown in Figure 1. Due to the perspective view, the perforated portion 26 can be seen within the glazing inner wall 3 in Figure 6.

[0110] Figure 7 shows a cross-section of the shielding glass unit III according to the present invention. In this shielding glass unit III, a spacer I is positioned between the first pane 20 and the second pane 21, which substantially corresponds to the one described in Figure 1, except that the spacer I used in the shielding glass unit III of Figure 7 has a barrier film 28. The barrier film 28 is positioned on the outer wall 4, the first connecting wall 6.1, the second connecting wall 6.2, and parts of the lateral walls 2.1 and 2.2. The first pane 20, the second pane 21, and the barrier film 28 define the outer inter-pane space 24 of the shielding glass unit III. The edges 29 of the first pane 20 and the edges 30 of the second pane 21 are positioned at the same height. A secondary sealant 25, which includes, for example, silicone, is positioned in the outer inter-pane space 24. The silicone contributes to the high stability of the shielding glass unit III by particularly absorbing the forces acting on the edge joints. The barrier film 28 works in cooperation with the secondary sealant 25 to block the inner interpane space 23, reducing heat transfer from the body 1 to the inner interpane space 23. The barrier film 28 can be attached to the body 1 with, for example, PUR hot melt adhesive. A primary sealant 22 is preferably placed between the side walls 2.1 and 2.2 and the panes 20 and 21. The primary sealant includes, for example, butyl. The overlap of the primary sealant 22 with the barrier film 28 prevents any interfacial diffusion that may occur. The first pane 20 and the second pane 21 preferably have the same dimensions and thickness. The panes preferably have a light transmittance of >85%. The panes 20 and 21 preferably contain glass and / or polymers, preferably plate 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 designed as composite glass panes. A desiccant 27, such as a molecular sieve, is placed inside the cavity 5 of the main body 1.This desiccant 27 can be filled into the cavity 5 of spacer I before the assembly of the shielding glass unit III. The inner wall of the glazing 3 is provided with perforations 26 that allow gas exchange with the inner interpane space 23.

[0111] The barrier film 28 includes, for example, a 7 μm thick aluminum metal-containing barrier layer, a 12 μm thick polyethylene terephthalate (PET) polymer layer, and a 10 nm thick aluminum metal-containing thin layer. Polyethylene terephthalate is particularly suitable for protecting the 7 μm thick aluminum layer from mechanical damage because the PET film is characterized by particularly high tear resistance. The film layers are arranged, for example, so that the aluminum layer, i.e., the metal-containing barrier layer and the metal-containing thin layer, are on the outside. The film is positioned on the body 1 such that the metal-containing barrier layer faces the outer wall 4. In this case, the metal-containing thin layer faces outwards and at the same time functions as an adhesive layer to the secondary sealant material. Therefore, the metal-containing thin layer not only has a barrier effect but also functions as an adhesion promoter.

[0112] Figure 8 shows a flowchart of the method according to the present invention for manufacturing a shielding glass unit III according to the present invention. In the first step I, spacers I or II according to the present invention are provided. In the second step II, spacers I or II are joined together to form a spacer frame. In the third step III, a first pane 20 and a second pane 21 are provided. Alternatively, the third step III may be performed before the first step I. In the fourth step IV, spacers I or II are fixed between the first pane 20 and the second pane 21 with a primary sealant 22. In the fifth step V, the pane structure, consisting of panes 20, 21 and spacers I or II, is subjected to pressure treatment with a shielding glass press. In the sixth step VI, the outer inter-pane space 24 is at least partially filled with a secondary sealant 25. [Explanation of Symbols]

[0113] I Spacer II Spacer III Shielding Glass Unit 1 Main unit 2.1 First lateral wall 2.2 Second lateral wall 3. Glazed interior walls 4 Outer wall 5 Cavity 5.1 Cavity 5.2 Cavity 6.1 First connecting wall 6.2 Second connecting wall 7. First Plastic Material 8. Second Plastic Material 9 Section 1 10 Section 2 11 Section 3 12 Section 4 13 Section 5 14 Section 6 15 Section 7 16 Section 8 17 Surface 18 layers 19 Recess 20. The first pain 21. The Second Pain 22 Primary sealant 23. Inner inter-pane space 24 Outer inter-pane space 25 Secondary sealant 26 Perforations within the inner wall of the glazing 27. Desiccant 28 Barrier film 29 The edge of the first pane 30 The edge of the second pane X horizontal direction Y (vertical direction) Z-longitudinal direction D1 Total thickness of the exterior wall D2 Total thickness of the exterior wall b. Width of the polymer body along the inner surface of the glazing g Total height of the body along the contact surface

Claims

1. A spacer (I) for a shielding glass unit, wherein the spacer (I) is - Body (1) co-extruded from the first plastic material (7) and the second plastic material (8) The main body (1) includes at least the following: - A first lateral wall (2.1), and a second lateral wall (2.2) arranged parallel to the first lateral wall (2.1), - The glazing interior wall (3) connects the aforementioned side walls (2.1, 2.2) to each other, - Outer walls (4) are arranged substantially parallel to the glazing inner wall (3) and connect to each other directly or via connecting walls (6.1, 6.2) with the lateral walls (2.1, 2.2), - Cavities (5) enclosed by the lateral walls (2.1, 2.2), the glazing interior wall (3), and the outer wall (4), or enclosed by the lateral walls (2.1, 2.2), the glazing interior wall (3), the outer wall (4), and the connecting walls (6.1, 6.2) Includes, The main body (1) is designed as a hollow profile, and the hollow profile is formed from the first plastic material (7) and the second plastic material (8), and has an alternating arrangement of A segments and B segments, the A segments being formed from the first plastic material (7), and the B segments being formed from the second plastic material (8), and the A segments and the B segments each extend along the longitudinal direction (Z) of the spacer (I) and are in contact with each other in the longitudinal direction (Z). The outer wall (4) includes a first section (9), the first section (9) is made up of B segments and is located in the center of the outer wall (4) in the lateral direction (X) of the spacer (I) perpendicular to the longitudinal direction (Z) of the spacer (I), and extends over the entire thickness (D1) of the outer wall (4) in the vertical direction (Y) of the spacer (I) perpendicular to the longitudinal direction (Z) of the spacer (I). The first lateral wall (2.1) includes a second section (10) consisting of a B segment. The second side wall (2.2) includes a third section (11) consisting of a B segment. The second plastic material (8) has a lower thermal conductivity than the first plastic material (7), and is a spacer (I).

2. The spacer (I) according to claim 1, wherein the glazing inner wall (3) includes a fourth section (12) consisting of a B segment.

3. The transition between the lateral wall (2.1) and the outer wall (4), or the transition between the connecting wall (6.1) and the outer wall (4), includes a fifth section (13) consisting of A segments. The spacer (I) according to claim 1 or 2, wherein the transition between the lateral wall (2.2) and the outer wall (4), or the transition between the connecting wall (6.2) and the outer wall (4), includes a sixth section (14) made of A segments.

4. The transition between the lateral wall (2.1) and the glazing interior wall (3) includes a seventh section (15) consisting of A segments. The spacer (I) according to any one of claims 1 to 3, wherein the transition between the lateral wall (2.2) and the glazing inner wall (3) includes an eighth section (16) made of A segments.

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

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

7. The aforementioned side wall (2.1) consists of a second section (10), The spacer (I) according to any one of claims 1 to 3, 5, and 6, wherein the lateral wall (2.2) comprises a third section (11).

8. The spacer (I) according to any one of claims 1 to 7, wherein a layer (18) formed from the second plastic material (8) is disposed on the entire surface (17) of the glazing inner wall (3) outside the cavity (5).

9. The spacer (I) according to any one of claims 1 to 8, wherein the first plastic material (7) is a glass fiber reinforced plastic material, and the second plastic material (8) has a lower glass fiber content than the first plastic material (7) or is a plastic material that does not contain glass fibers.

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

11. A spacer (II) for a shielding glass unit, wherein the spacer (II) is - Body (1) co-extruded from the first plastic material (7) and the second plastic material (8) The main body (1) includes at least the following: - A first lateral wall (2.1), and a second lateral wall (2.2) arranged parallel to the first lateral wall (2.1), - A glazing interior wall (3) connecting the aforementioned lateral walls (2.1, 2.2) to each other, wherein the glazing interior wall (3) has recesses (19) for accommodating panes, which extend substantially parallel to the aforementioned lateral walls (2.1) and (2.2), - Outer walls (4) are arranged substantially parallel to the glazing inner wall (3) and connect to each other directly or via connecting walls (6.1, 6.2) with the lateral walls (2.1, 2.2), - Cavities (5.1, 5.2) wherein each cavity (5.1, 5.2) is surrounded by the first lateral wall (2.1) and the second lateral wall (2.2), the glazing interior wall (3), the outer wall (4), and the recess (19), respectively, or is surrounded by the first lateral wall (2.1) and the second lateral wall (2.2), the glazing interior wall (3), the outer wall (4), the connecting wall (6.1) and the connecting wall (6.2), and the recess (19), respectively. Includes, The main body (1) is designed as a hollow profile, and the hollow profile is formed from the first plastic material (7) and the second plastic material (8), and has an alternating arrangement of A segments and B segments, the A segments are formed from the first plastic material (7), and the B segments are formed from the second plastic material (8), and the A segments and B segments each extend along the longitudinal direction (Z) of the spacer (II) and are in contact with each other in the longitudinal direction (Z). The outer wall (4) includes two first sections (9), each of which consists of a B-segment and is positioned in the center between the first lateral wall (2.1) and the second lateral wall (2.2) and the recess (19) in the lateral direction (X) of the spacer (II) perpendicular to the longitudinal direction (Z) of the spacer (II), and over the entire thickness (D2) of the outer wall (4) in the longitudinal direction (Y) of the spacer (II) perpendicular to the longitudinal direction (Z) of the spacer (II). The first lateral wall (2.1) includes a second section (10) consisting of a B segment. The second side wall (2.2) includes a third section (11) consisting of a B segment. The second plastic material (8) has a lower thermal conductivity than the first plastic material (7), and is a spacer (II).

12. A method for manufacturing a spacer (I) according to any one of claims 1 to 10 or a spacer (II) according to claim 11, wherein at least, (a) Provide a first nozzle for extruding a first plastic material (7), (b) Provide a second nozzle for extruding a second plastic material (8), (c) A method comprising forming a body (1) by co-extruding the first plastic material (7) and the second plastic material (8), wherein the body (1) is configured as a hollow profile, the hollow profile being formed from the first plastic material (7) and the second plastic material (8), and having an alternating arrangement of A segments and B segments.

13. A shielding glass unit (III) comprising a first pane (20), a second pane (21), and at least a spacer (I) according to any one of claims 1 to 10 or a spacer (II) according to claim 11, disposed around the periphery between the first pane (20) and the second pane (21), - The first pane (20) is attached to the first lateral wall (2.1) by a primary sealant (22), - The second pane (21) is attached to the second lateral wall (2.2) by a primary sealant (22), - The inner inter-pane space (23) and the outer inter-pane space (24) are separated by the spacer (I) or (II), - A shielding glass unit (III) in which a secondary sealant (25) is placed in the outer interpane space (24).

14. A method for manufacturing the shielding glass unit (III) according to claim 13, wherein at least, (a) to provide a spacer (I) according to any one of claims 1 to 10 or a spacer (II) according to claim 11, (b) Assemble the spacers (I) or (II) to form a spacer frame, (c) Provide a first pane (20) and a second pane (21), (d) The spacer (I) or (II) is fixed between the first pane (20) and the second pane (21) by primary sealant (22), (e) The pane structure, which is composed of the panes (20, 21) and the spacers (I) or (II), is subjected to pressure treatment. (f) A method of at least partially filling the outer interpane space (24) with a secondary sealant (25).

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

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