EP3023569B1 - Spacer for spacing glass sheets of a multiple glazed window - Google Patents

Spacer for spacing glass sheets of a multiple glazed window Download PDF

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Publication number
EP3023569B1
EP3023569B1 EP15191282.1A EP15191282A EP3023569B1 EP 3023569 B1 EP3023569 B1 EP 3023569B1 EP 15191282 A EP15191282 A EP 15191282A EP 3023569 B1 EP3023569 B1 EP 3023569B1
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EP
European Patent Office
Prior art keywords
spacer
outer shell
desiccant
siox
extrusion
Prior art date
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EP15191282.1A
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German (de)
French (fr)
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EP3023569A1 (en
Inventor
Hans Rudolf Mäder
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Alu Pro SRL
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Alu Pro SRL
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Application filed by Alu Pro SRL filed Critical Alu Pro SRL
Priority to EP15191282.1A priority Critical patent/EP3023569B1/en
Priority to PL15191282T priority patent/PL3023569T3/en
Publication of EP3023569A1 publication Critical patent/EP3023569A1/en
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    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663Elements for spacing panes
    • E06B3/66309Section members positioned at the edges of the glazing unit
    • E06B3/66328Section members positioned at the edges of the glazing unit of rubber, plastics or similar materials
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663Elements for spacing panes
    • E06B3/66309Section members positioned at the edges of the glazing unit
    • E06B3/66361Section members positioned at the edges of the glazing unit with special structural provisions for holding drying agents, e.g. packed in special containers
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663Elements for spacing panes
    • E06B3/66309Section members positioned at the edges of the glazing unit
    • E06B2003/6638Section members positioned at the edges of the glazing unit with coatings
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663Elements for spacing panes
    • E06B3/66309Section members positioned at the edges of the glazing unit
    • E06B2003/6639Section members positioned at the edges of the glazing unit sinuous

Definitions

  • the invention relates to a spacer for the spacing of glass panes of a multi-glazed window, a multi-glazed window, and a method for producing a spacer with the features of the preambles of the independent claims.
  • Multi-glazed windows are colloquially called multi-pane insulating glass. This type of glazing is primarily used for thermal insulation, that is, the prevention of heat loss to a cold environment or the prevention of heating of the interior by a relatively warmer environment.
  • Multi-glazed windows usually consist of at least two glass panes arranged in parallel, which are spaced from a spacer. The result is between the glass panes, a space between the panes, which, filled with air or gas, represents an insulating layer.
  • spacers with a cavity which contains a desiccant for drying the trapped air in the space between the panes.
  • Spacers are usually designed so that they prevent the diffusion of water vapor from outside the space between the panes in the space between the panes and at the same time Ensure gas and water vapor exchange between the atmosphere of the space between the panes and the desiccant.
  • plastic spacers are manufactured in one piece by profile extrusion. The cavity is then subsequently filled with a desiccant.
  • WO 2010/115456 A1 shows a multiple glass pane comprising two outer glasses, at least one center glass and a spacer, wherein the spacer has a cavity for receiving a desiccant and for each center glass a receiving profile and the cavity of the spacer is filled with a desiccant.
  • the spacer has an additional vapor barrier in the form of a metallic rolled foil.
  • silicone Since silicone has the tendency to outgassing, there is also the problem that form with rapid use in the space between the panes rainfall ("fogging"). Silicone has a high water vapor penetration rate and is not suitable for protecting the loading of the desiccant matrix.
  • a spacer is to be provided, which has improved properties with respect to outgassing of the plastic material and improved UV and thermal insulation properties.
  • An advantageous spacer for the spacing of glass panes of a multi-glazed window comprises an outer shell.
  • This outer shell at least partially encloses the desiccant and the desiccant is enclosed on all sides by the outer shell at least in a first crude product.
  • the drying agent is at least partially enclosed by the silicone-free outer shell.
  • the outer shell is produced by coextrusion of a plastic matrix with the desiccant. Production by coextrusion allows a flexible choice of material: the material can be chosen freely in terms of color or in terms of properties for the vapor barrier function or for adhesives for contact with glass panes.
  • a spacer comprises a desiccant with an outer shell and an inner structure which is more porous than the outer shell.
  • the outer shell and the inner structure are made of a component, typically of a polymer matrix, in which a desiccant is incorporated. It has been found that in a mono-extrusion automatically forms an outer shell, which encloses the porous inner part.
  • the outer shell has a smooth, less porous surface.
  • the outer shell has a lower water vapor permeability due to their low porosity and thus protects the desiccant during storage.
  • the smooth exterior structure thus has a certain protective function against the passage of water vapor.
  • the component compound of plastic and desiccant after monoextrusion but also additionally packed vacuum be present in airtight containers.
  • a gas and water vapor connection with an outer side which is zuwendbar a disc space.
  • gas and water vapor communication may be facilitated by means of a porous material or perforation or other openings in said region, preferably said side, of the spacer in an end product.
  • the drying agent in the inner structure is held in both variants in a polymer matrix which is porous is. Porous means in particular porous and water vapor permeable than the outer shell of the spacer.
  • the spacer according to the invention also preferably has at least one primary seal for the material-locking connection of the spacer with at least one glass pane, namely a highly adhesive glue.
  • the adhesive adhesive may be covered with a protective film.
  • a surface treatment on the profile can take place, for example, by the corona or plasma process.
  • At least the silicone-free outer shell and the drying agent of the spacer are present as a composite by coextrusion. Due to the coextrusion of the outer shell with the desiccant this is present as a multi-layer composite of the two components.
  • the spacer is made entirely of materials that have no or only a negligible outgassing after molding, in particular, the spacer is completely silicone-free.
  • This composite eliminates the need for a later assembly of the spacer with a desiccant.
  • the drying agent can be enclosed as far as desired low diffusion of the outer shell during manufacture.
  • inventive spacer This allows storage of the inventive spacer at atmospheric conditions without exhausting the water absorption properties of the drying agent by the water vapor present in the atmospheric air.
  • inventive spacer thus allows the same storage until the manufacture of insulating glass.
  • the outer shell substantially has a low water vapor permeability and is present as a composite by mono-extrusion with the porous inner structure.
  • the moisture absorption of desiccants is typically standardized. Zeolite desiccants typically have a water holding capacity of 20%. Due to the protective function of the outer shell, the initial load of the desiccant with water remains small and this value is also retained during storage or water cooling in the profile extrusion process. It has been shown that, especially in the case of monoextrusion of a desiccant matrix of TPE, the absorption of water vapor into the desiccant present inside the outer shell takes place much more slowly than with known spacers. For a standard load in the case of a TPE spacer according to the invention, the water vapor absorption after one month is 5%, while the same value in known silicone-based spacers is more than 8%. The spacers according to the invention are therefore much less critical in terms of water vapor absorption during production and storage.
  • inventive spacers can be made more efficient. In particular, it is possible by simple Wasserbadkühlung to increase the extrusion rate, without significantly damaging the water absorbency of the desiccant.
  • the spacer is present as a composite by coextrusion of a thermoplastic material with a plastic matrix enriched with the desiccant.
  • the spacer is present as a monoextrusion of a drying agent contained in a plastic matrix, which results in an outer shell and a porous structure that is more porous in comparison.
  • the at least one primary seal is also present as a composite by coextrusion with the outer shell.
  • the primary seal extends longitudinally along the entire length of the profile.
  • the thus configured primary seal can thus fulfill a dual function: connect the spacer cohesively with a glass pane and at the same time prevent the diffusion of water vapor from outside a space between panes in the space between the panes as a seal.
  • a primary seal with such a double function ie, a material which simultaneously has sufficient adhesive properties between the spacer profile and a glass sheet and also has sufficient sealing properties, in connection with other types of spacers and not necessarily in coextruded form can be advantageous.
  • an adhesive butyl is used to produce such a double function.
  • an adhesive film preferably an acrylate adhesive tape
  • an adhesive film which serves for positioning and fixing the spacer in relation to a glass pane during the production of an insulating glass.
  • the spacer can also be subjected to a corona treatment at least in the region which is provided with the adhesive tape.
  • the adhesive tape may be provided with a cover sheet which may be peeled off before use of the spacer.
  • the spacer according to the invention has an essentially four-edged shape in profile.
  • the profile cross section of a spacer according to the invention has a substantially rectangular shape with a first side length of between 6 and 24 mm, and particularly preferably 12 or 16 mm side length.
  • the page length also depends in particular on the intended application: in applications for triple glazing, overall widths of 12-30 mm are typically preferred.
  • a second side has a side width of between 6 to 16 mm, more preferably 6 to 8 mm.
  • the materials of the spacer are preferably selected to be a substantially flexible spacer resulting in an automated production of multi-glazed windows and can be wound up for storage on wheels. The production of multi-glazed windows can then be done by robot.
  • the spacer has at least one vapor barrier to prevent water vapor diffusion on one side of the spacer.
  • the vapor barrier is intended to prevent the diffusion of water vapor through the side facing the outside during assembly, i. the frame faces prevent.
  • a vapor barrier according to the invention may be a film which is adhered after extrusion.
  • the vapor barrier is preferably produced by producing a vapor-impermeable plastic by coextrusion with the outer shell and the drying agent or the polymer matrix as a composite.
  • the vapor barrier may be in the form of a metallic rolled foil and / or sputter-coated metallic or glassy layer.
  • a vapor barrier which is present as a laminate, in particular of a PE layer, on which at least one PET-SiOx layer is applied. Preference is given to two PET-SiOx layers.
  • the PE layer can be easily connected to the outer shell of a TPE spacer, in particular welded.
  • the PET-SioX layer forms good contact for commonly used primary seals, e.g. Butyl adhesive.
  • Such a vapor barrier can be applied in particular immediately after or during the extrusion. The welding is preferably carried out immediately after the extrusion of the profile.
  • the extrusion die itself may be provided with a feed for the vapor barrier.
  • film thicknesses below a permissible stress limit can be connected directly to the plastic melt within the tool.
  • the film is fed directly after the die during the relaxation phase to the extruded profile.
  • the spacer has a first, substantially flat base surface and a second, substantially flat opposite base surface.
  • the first base in the final product is substantially permeable to water vapor and the second base is substantially impermeable to water vapor.
  • the first base is aligned so that it faces the space between the panes and the second base faces the window frame.
  • a distinction between a tradable crude product and a tradable end product of the inventive spacer takes place.
  • the diffusion of water vapor to the internal structure, which includes the desiccant difficult. This is done by a diffusion-tight outer shell in the first embodiment or by a less porous, smooth outer shell in the second embodiment.
  • the end product, ie the "activated" at or shortly before mounting spacers allows on at least one side, which faces a disc space between two glass panes, the diffusion of water vapor into the interior of the spacer better.
  • the first base area has at least one opening, in particular one or more perforations.
  • the second base has the vapor barrier.
  • the vapor barrier is preferably a laminate of PE and at least one PET-SiOx layer.
  • metallic rolled foils are also conceivable, in particular rolled foils comprising aluminum or a stainless steel foil. Also conceivable is a vapor-deposited metal layer.
  • the outer shell co-extruded with the desiccant matrix has no silicone, in particular it comprises or consists essentially of a thermoplastic elastomer selected from the group consisting of: TPS (styrene block copolymers), TPC ( thermoplastic polyester elastomers), TPV (crosslinked thermoplastic olefin elastomers), TPU (thermoplastic polyurethane elastomers) and TPA (thermoplastic polyamide elastomers).
  • a thermoplastic elastomer selected from the group consisting of: TPS (styrene block copolymers), TPC ( thermoplastic polyester elastomers), TPV (crosslinked thermoplastic olefin elastomers), TPU (thermoplastic polyurethane elastomers) and TPA (thermoplastic polyamide elastomers).
  • the outer shell in particular TPV, additionally tempered chalk and / or talc is added. This can reduce the Shore hardness.
  • the thermoplastic elastomer has at least one, preferably all of the following properties:
  • the Shore hardness is between 60 ShA and 75 ShA, preferably between 65 ShA and 70 ShA.
  • It preferably has a lifetime of more than 20 years.
  • UV-stabilized, organic materials such as TPE olefins and TPU elastomers exposed. They are characterized by a low water vapor permeation. More preferably, TPA polyamides or adapted biopolymer compounds can be used which satisfy the above conditions.
  • the polymer matrix for the drying agent consists of components of the Olefinic TPE group, in particular from Infuse 9007 of the manufacturer DOW.
  • the polymer matrix in particular from Olefic TPE
  • the mono-extruded polymer matrix has at least one, preferably all, of the following properties:
  • the Shore hardness is between 60 ShA and 75 ShA, preferably between 65 ShA and 70 ShA.
  • It preferably has a lifetime of more than 20 years.
  • the primary seal is selected from the group consisting of butyl, acrylate and hot melt adhesives. If the primary seal is designed as an adhesive, it can simultaneously perform two functions: on the one hand, the seal is useful for sealing in a manner known per se. At the same time it assumes a positioning function in the insulating glass assembly. Instead of two different materials (acrylic for positioning and butyl for sealing), the primary seal can fulfill both functions. Of course, this solution can also be used advantageously in connection with other spacers.
  • a spacer according to the invention can be adapted according to the contour of the glass.
  • the spacer is preferably formed in one piece. This facilitates all handling during assembly. In addition, a particularly cost-effective production is possible by the integral formation of the spacer.
  • the spacer in addition to its substantially rectangular basic shape has a recess, in particular a groove, for receiving a glass pane on.
  • a spacer designed in this way is particularly suitable for receiving the middle glass pane of a triple-glazed window.
  • such a spacer also has a portion of the primary seal in this groove.
  • a spacer which has a basic shape as in WO 2010/11545 has shown.
  • the spacer may have a shape characteristic, which has a precisely defined position relative to the central receptacle of the spacer and which serves for positioning the spacer when inserting the middle pane.
  • This shape feature may typically be formed as a track groove on the side facing away from the side for receiving the middle disc. While such a shape feature is particularly preferred in connection with inventive spacers, it goes without saying that it can also be advantageous for other spacers for triple glazing.
  • the outer shell has two chambers with desiccant which are present as a composite by coextrusion with the outer shell.
  • the spacer on the first flat base has at least one weakening point which is perforated at or shortly before the production of insulating glass and thereby gas and water vapor permeability of the first flat base to the desiccant guaranteed.
  • a weakening point can be achieved by a thinner compared to the surrounding wall thickness wall thickness of the outer shell.
  • Such a weakening in the first variant is particularly preferred. But it can also be advantageous in the second variant.
  • the drying agent may preferably be present as a matrix in a plastic.
  • Particularly suitable are drying agents based on molecular sieves, in particular silica gels and zeolites.
  • the outer shell ensures UV resistance, elasticity and a high dimensional stability in the first place.
  • the desiccant may comprise up to 40, preferably up to 70%, more preferably up to 90%, of the cross-section of the spacer.
  • the outer shell has a wall thickness of 1 ⁇ 0.5mm.
  • Another aspect of the present invention relates to a method for producing a spacer, in particular a spacer as described above.
  • a silicone-free outer shell and a more porous in comparison to the outer shell inner structure containing the desiccant are extruded, so that the porous inner structure is completely enclosed by the outer shell.
  • a silicone-free outer shell and a drying agent are coextruded by means of a profile multi-nozzle, so that the drying agent is enclosed by the outer shell completely and diffusion-tight.
  • a suitable profile nozzle is for example in US 5851609 shown.
  • a suitable profile nozzle has multiple channels to extrude the individual components.
  • the outer shell and the inner structure are mono-extruded in such a way that a more porous interior structure is created compared to the outer shell, which is completely enclosed by the outer shell.
  • the outer shell is preferably rendered air and vapor permeable at at least one point.
  • this step can be dispensed with depending on the porosity of the outer shell.
  • This step can be postponed until the production of insulating glass.
  • the extrusion can take place with water cooling, without the drying agent being exhausted in its water absorption capacity even before assembly, because at that time the drying agent is completely enclosed by the outer shell. This makes it possible to extrude much more efficiently and with higher throughput.
  • the outer shell is perforated after the extrusion at least one point, so that an opening is formed.
  • the outer shell is extruded with a weakening point, which is opened at least one point after the extrusion, so that an opening is formed.
  • Such a weakening point can be produced, for example, by a profiled nozzle which is designed such that a weakening point, in particular a point with reduced wall thickness, is extruded. This makes it easier to perforate the corresponding point of the outer shell.
  • the extrusion additionally comprises the extrusion of a seal, in particular a seal comprising a butyl, acrylate, or hot melt adhesive.
  • the part of the outer shell which faces the space between the panes is rendered air and vapor permeable only during assembly, for example by perforating the said part during processing by means of a production robot. This can happen at weak points.
  • Another aspect of the present invention relates to a multi-glazed window having at least two spaced-apart parallel glass panes and a spacer disposed between the panes of glass for spacing as previously described.
  • the spacer is preferably fixed directly to a primary seal with the glass.
  • the gap between the first and the second glass sheet is formed by the spacer is sealed off and outside of the space between the panes with another secondary seal.
  • secondary seals are known in the art. Polysulfites, polyurethanes and silicones have proved to be particularly suitable.
  • the outer shell encloses the drying agent at the time at which the spacer is fixed on a glass pane, still completely.
  • the outer shell encloses the inner structure which contains the desiccant airtight and vapor-tight.
  • the edge of the spacer facing the space between the panes can be rendered permeable to air and steam in both embodiments, for example by being perforated or a part of the outer shell being loosened at a weakening point.
  • the multi-glazed window is assembled in an automated process with a robot.
  • Particularly preferred is perforated only in the production of insulating glass by an application robot, so that the desiccant load is small and thus the water absorption capacity remains as high as possible.
  • the multi-glazed window comprises, in a preferred embodiment, at least two panes of glass spaced apart by a spacer defining a disc space therein, and an outer space located externally on the spacer between the panes.
  • said outer space is sealed diffusion-tight with a secondary seal.
  • the spacer comprises no silicone and in particular comprises an outer shell which at least partially encloses a desiccant matrix.
  • the outer shell is preferably designed such that vapor diffusion between the space between the panes and a drying agent embedded in the drying agent matrix is made possible.
  • the initial loading of the desiccant with water is very low. This also increases the life of a multi-glazed window, which is equipped with the inventive spacer.
  • the conditions according to standard EN1279 part 2 and part 3 are more reliable and longer fulfilled.
  • the argon loss from the gap between the disks is less than 1% per year.
  • the internal structure has at least one cavity.
  • the at least one cavity leads to a reduction of the PSI value.
  • Interior structures without cavities are also conceivable. However, due to the material and cost savings, an embodiment with cavities is preferable.
  • the wall thickness of the outer shells 7 and 12 may be variable depending on the choice of material.
  • the outer shell 7 or 12 is now shown as an example.
  • FIG. 1 shows a spacer 1 of the prior art with a substantially rectangular profile cross-section. On the two narrow sides of a primary seal 3 is attached. Usually, butyl compounds are used as the primary seal. The spacer 1 also has a vapor barrier 4. Usually, aluminum, aluminum alloys, stainless steel or plastic films are used as a vapor barrier 4.
  • FIG. 2 shows a further spacer 1, which is adapted for use with multi-glazed windows with three or more panes.
  • the spacer 1 has a vapor barrier 4 and two primary seal 3 on the respective narrow sides of the spacer 1.
  • the spacer also has a groove with a further sealant 6, which usually Acrylatadhesive or hot melts are used.
  • a glass pane 5 is materially connected by the seal 6 with the spacer 1.
  • On the side facing away from the third disc 5 side of the spacer is also provided with a track groove, which indicates the position of the groove.
  • the track groove is used in the production of insulating glass, the positioning of the spacer.
  • the track groove is shown in connection with a conventionally made spacer. It goes without saying that such ruts in Connection with the coextruded or mono-extruded spacers described below are particularly easy to produce.
  • FIG. 3 shows a spacer 1 according to the invention with a thermoplastic sheath 7, which encloses a drying agent 8.
  • the spacer 1 has a sheath 7 with a thickness of 1 mm.
  • the spacer 1 has a height H of 6.5 mm, a height h of 3.5 mm, a width B of 9.8 mm and a width b of 0.8 mm.
  • the spacer 1 also has a sputtered surface 4, which prevents the passage of gas and water vapor as a vapor barrier.
  • the narrow sides of the spacer 1 are provided with an acrylic elastomer (VAMAC; Typon) as a strong adhesive (positioning adhesive) 3.
  • VAMAC acrylic elastomer
  • the sheath 7 also has on one side perforations 9, so that a gas exchange between the desiccant and the disc space (not shown) can take place.
  • the sheath 7 consists of a flexible, hand-bendable thermoplastic elastomer.
  • the elastomer has a Shore A hardness of over 60 ShA, is fogging safe and diffusion-tight for water vapor and argon gas.
  • the sheath 7 from the product group Saran and is coextruded together with the desiccant matrix.
  • the vapor barrier 4 to the secondary seal preferably consists of a composite functional film.
  • Particularly suitable are diffusion-tight films sputtered with SiO 2 .
  • Particular preference is given to a PE / PET-SiOx / PET-SiOx laminate which has been welded on after the extrusion, wherein the PE layer can be turned towards the spacer and the PET-SiOx layer can be turned towards the glass.
  • films based on EVOH are conceivable.
  • a glass, aluminum, stainless steel or plastic film after the coextrusion of the sheath 7 and the desiccant matrix 8 are glued.
  • the primary seals (positioning adhesive) 3 can also be attached to the spacer 1 in an attached manufacturing step.
  • the vapor barrier 4 may be a rolled metal foil, which may be chosen between 10 and 30 mm (aluminum) or 6 and 12 mm (stainless steel) thick depending on the material used.
  • the rolled foils can also be made corrugated. The corrugation takes place transversely to the longitudinal direction of the spacer. As a result, the spacer is more flexible and can be wound up better. Of course, in this case, the plastic material applied to the film is also corrugated accordingly.
  • FIG. 4 shows an alternative embodiment of the spacer 1 from FIG. 3 ,
  • the spacer 1 comprises a Dow Saran TM Barrier Films thermoplastic sheath 7 which encloses a desiccant matrix 8 (as described above) in two separate chambers.
  • a desiccant matrix 8 as described above
  • the jacket 7 is provided with perforations 9 at two points 9, so that water vapor exchange between the desiccant matrix and the space between the panes (not shown) is made possible.
  • Figure 4 schematically shows a central disc 5 of a triple-glazed window, which is embedded in a groove and is adhesively bonded by means of an Adhesivklebers 6 with the spacer 1.
  • the spacer also has a track groove for positioning relative to the center disc.
  • the spacer 1 also has a vapor barrier 4.
  • the vapor barrier preferably has a film coated with SiOx, for example a PET-SiOx film.
  • a laminate of PE / PET-SiOX / PET-SiOx from the manufacturer AMCOR is preferred.
  • the PET-SiOx layer is a PET carrier that is in a high vacuum is coated with silicon.
  • vapor barriers from a subsequently attached stainless steel foil, aluminum roller foil or other metal foil or vapor-deposited metal are conceivable.
  • the spacer also has two primary seals 3 made of an acrylate adhesive, which were also attached later.
  • TPU foam, butyl, hotmelt or EPDM would also be well suited.
  • zeolite having a volumetric fraction of 25 to 60% in a matrix of an olefin block copolymer (eg INFUSE TM 9700 from DOW®) or a polyolefin elastomer (eg ENGAGE TM from DOW®).
  • an olefin block copolymer eg INFUSE TM 9700 from DOW®
  • a polyolefin elastomer eg ENGAGE TM from DOW®
  • thermoplastic sheath 7 and the desiccant matrix 8 are coextruded in one process step.
  • seal 6 can be coextruded with the desiccant matrix 8 and the thermoplastic jacket 7.
  • FIG. 5 shows a spacer 1 mounted between two panes 5.
  • the spacer 1 has a thermoplastic jacket 7 in combination with a drying agent 8.
  • the thermoplastic sheath consists of TPU or olefins.
  • the spacer also has on both sides an adhesive tape 11, which was previously coated with a film and wherein the film was detached before the application of the spacer 1 on the glass sheets 5.
  • the spacer 1 also has primary locks 3 made of butyl adhesive.
  • a secondary seal 10 of polysulfide-thiover or polyurethane-polyver additionally seals the spacer 1 from the outside atmosphere.
  • the desiccant 8 is used as a matrix of desiccant and a Plastic extruded, the materials of the Figures 3 and 4 be used.
  • FIG. 6 shows a spacer 1, in which, unlike FIG. 5 the adhesive tape and the primary barrier have been replaced by a primary barrier 3 made of Adhesiv Hotmelt or butyl (adhesive).
  • the primary barrier 3 thus performs a dual function: cohesive bonding of the glass panes and prevention of vapor diffusion.
  • the primary barrier 3 can be coextruded with the remaining components of the spacer.
  • the adhesive tape is in FIG. 6 (not shown in detail) similar as in the Figures 2 or 3 a deposition or a groove provided (which is also already used in these figures for receiving the primary seals 3.
  • the FIG. 7 is different from the FIG. 5 by a welded to the thermoplastic elastomer 7 vapor barrier 4 made of a SiO x coated film or a bonded film of aluminum or stainless steel.
  • the thermoplastic elastomer 7 encloses a drying agent 8.
  • FIG. 8 shows in perspective a cross section of a portion of a spacer 1 which is present as a band cutout.
  • the spacer 1 has a first planar base surface 20, which when mounted on a space between the panes (not shown) and a second flat base 21 which faces a window frame during assembly (not shown).
  • the spacer 1 has perforations 9 along the entire length of the side 20 to allow gas exchange with the desiccant.
  • the base 21 is limited by a diffusion-tight film.
  • FIG. 9 shows in perspective a cross section of a spacer 1, which is present as a band cutout.
  • the spacer 1 has an outer shell 12 and a porous inner structure 13.
  • the outer shell 12 and the inner structure 13 are mono-extruded as a component compound of a plastic matrix and desiccant.
  • the desiccant preferably used is zeolite and preferably constitutes 50% of the desiccant matrix.
  • the plastic for the matrix is Infuse 9007 from Dow.
  • Alternatively, eg HTC8312 / 59 can also be used by KRAIBURG TPE GmbH & Co. KG.
  • This embodiment can also be used for triple glazing and provided with a track groove as described above.
  • this embodiment may be provided as described above with adhesive tape and vapor barriers, in particular a vapor barrier made of a PE / PET-SiOx / PET-SiOx laminate film.
  • the extrusion takes place at a temperature of 130 ° C (in the extrusion die) to 160 ° C (in the forerun) and an extrusion speed of 5 to 30 m / min.
  • FIG. 10 shows in perspective a cross section of a spacer 1.
  • the drying means 8 has two cavities 14.
  • the drying agent is surrounded by a jacket 7.
  • the desiccant 8 with the cavities 14 is coextruded with the jacket 7.
  • FIG. 11 differs from FIG. 10 in that the spacer 1 as a whole is mono-extruded from a plastic matrix.
  • the spacer 1 has an outer shell 12 and an inner structure 13.
  • the inner structure also shows two cavities 14.
  • the spacer outer skin also has a lower water vapor permeability. This significantly increases the service life of multi-glazed windows with the spacers according to the invention.

Description

Die Erfindung betrifft einen Abstandhalter für die Beabstandung von Glasscheiben eines mehrfachverglasten Fensters, ein mehrfachverglastes Fenster, sowie ein Verfahren zur Herstellung eines Abstandhalters mit den Merkmalen der Oberbegriffe der unabhängigen Ansprüche.The invention relates to a spacer for the spacing of glass panes of a multi-glazed window, a multi-glazed window, and a method for producing a spacer with the features of the preambles of the independent claims.

Mehrfachverglaste Fenster werden umgangssprachlich auch Mehrscheiben-Isolierglas genannt. Diese Art der Verglasung dient vornehmlich der Wärmedämmung, das heisst der Verhinderung von Wärmeverlusten an eine kalte Umgebung oder der Verhinderung der Erwärmung des Innenraums durch eine relativ wärmere Umgebung.Multi-glazed windows are colloquially called multi-pane insulating glass. This type of glazing is primarily used for thermal insulation, that is, the prevention of heat loss to a cold environment or the prevention of heating of the interior by a relatively warmer environment.

Mehrfachverglaste Fenster bestehen üblicherweise aus mindestens zwei parallel angeordneten Glasscheiben, die von einem Abstandhalter beabstandet werden. So entsteht zwischen den Glasscheiben ein Scheibenzwischenraum, der, mit Luft oder Gas befüllt, eine Isolationsschicht darstellt.Multi-glazed windows usually consist of at least two glass panes arranged in parallel, which are spaced from a spacer. The result is between the glass panes, a space between the panes, which, filled with air or gas, represents an insulating layer.

Bekannt sind Abstandhalter aus Aluminium, Edelstahl oder Kunststoff, die mit einem thermoplastischem Dichtstoff durch Verpressen fest mit den Glasoberflächen verbunden werden.Are known spacers made of aluminum, stainless steel or plastic, which are connected to a thermoplastic sealant by pressing firmly with the glass surfaces.

Weiterhin ist es üblich, Abstandhalter mit einem Hohlraum zu versehen, der zur Trocknung der im Scheibenzwischenraum eingeschlossenen Luft ein Trocknungsmittel enthält.Furthermore, it is customary to provide spacers with a cavity which contains a desiccant for drying the trapped air in the space between the panes.

Abstandhalter sind üblicherweise so ausgelegt, dass sie die Diffusion von Wasserdampf von ausserhalb des Scheibenzwischenraums in den Scheibenzwischenraum unterbinden und gleichzeitig den Gas- und Wasserdampf Austausch zwischen der Atmosphäre des Scheibenzwischenraums und dem Trocknungsmittel gewährleisten.Spacers are usually designed so that they prevent the diffusion of water vapor from outside the space between the panes in the space between the panes and at the same time Ensure gas and water vapor exchange between the atmosphere of the space between the panes and the desiccant.

Bekannterweise werden Abstandhalter aus Kunststoff in einem Stück durch Profilextrusion gefertigt. Der Hohlraum wird anschliessend nachträglich mit einem Trocknungsmittel befüllt.As is known, plastic spacers are manufactured in one piece by profile extrusion. The cavity is then subsequently filled with a desiccant.

Dieses Verfahren ist aber aufwändig, da es einen weiteren Arbeitsschritt ausserhalb der Fertigungsstrasse benötigt. Ein fertiger Abstandhalter mit Trocknungsmittel hat zudem nur eine kurze Lagerbeständigkeit, da sich die Aufnahmekapazität des Trocknungsmittels bei Kontakt mit dem Wasserdampf atmosphärischer Luft zunehmend erschöpft.However, this method is expensive because it requires a further step outside the production line. A finished spacer with desiccant also has only a short shelf life, since the absorption capacity of the drying agent is increasingly exhausted in contact with the water vapor of atmospheric air.

DE 10 2006 024 402 A1 beschreibt einen Abstandhalter, der in einem Schritt aus Silikon und einem, ein Trocknungsmittelgemisch enthaltenden, Kern coextrudiert wird. Dabei wird die Grundfläche des Abstandhalters, die am montierten Fenster den Scheibenzwischenraum zugewandt ist, entweder mit einem offenporigen Silikon oder mit Schlitzen versehen, sodass ein Gasaustausch stattfinden kann. DE 10 2006 024 402 A1 describes a spacer which is coextruded in one step from silicone and a desiccant mixture containing core. In this case, the base of the spacer, which faces the space between the panes on the mounted window, is provided either with an open-pored silicone or with slots, so that a gas exchange can take place.

WO 2010/115456 A1 zeigt eine Mehrfachglasscheibe umfassend zwei Aussengläser, mindestens ein Mittelglas und einen Abstandhalter, wobei der Abstandhalter einen Hohlraum zur Aufnahme eines Trocknungsmittels und für jedes Mittelglas eine Aufnahmeprofil aufweist und der Hohlraum des Abstandhalters mit einem Trocknungsmittel befüllt ist. Der Abstandhalter weist eine zusätzliche Dampfsperre in Form einer metallischen Walzfolie auf. WO 2010/115456 A1 shows a multiple glass pane comprising two outer glasses, at least one center glass and a spacer, wherein the spacer has a cavity for receiving a desiccant and for each center glass a receiving profile and the cavity of the spacer is filled with a desiccant. The spacer has an additional vapor barrier in the form of a metallic rolled foil.

Diese Lösung löst allerdings das Problem der beschränkten Lagerzeit des so gefertigten Abstandhalters nicht. Nach wie vor erschöpft sich die Wasseraufnahmekapazität des Trocknungsmittels.However, this solution does not solve the problem of the limited storage time of the thus produced spacer. As before, the water absorption capacity of the desiccant is exhausted.

Da Silikon die Tendenz zum Ausgasen besitzt, besteht ausserdem das Problem, dass sich bei rascher Verwendung im Scheibenzwischenraum Niederschläge bilden ("Fogging"). Silikon weist eine hohe Wasserdampfpenetrationsrate auf und eignet sich nicht als Schutz der Beladung der Trocknungsmittelmatrix.Since silicone has the tendency to outgassing, there is also the problem that form with rapid use in the space between the panes rainfall ("fogging"). Silicone has a high water vapor penetration rate and is not suitable for protecting the loading of the desiccant matrix.

Es ist deshalb eine Aufgabe der vorliegenden Erfindung, die Nachteile der Bekannten zu überwinden und einen Abstandhalter bereitzustellen, welcher kostengünstig und effizient herstellbar ist und eine verbesserte Lagerfähigkeit aufweist.It is therefore an object of the present invention to overcome the disadvantages of the known and to provide a spacer which is inexpensive and efficient to produce and has an improved shelf life.

Insbesondere soll auch ein Abstandhalter bereitgestellt werden, der verbesserte Eigenschaften bezüglich Ausgasung des Kunststoffmaterials und verbesserte UV- sowie Wärmedämmungseigenschaften aufweist.In particular, a spacer is to be provided, which has improved properties with respect to outgassing of the plastic material and improved UV and thermal insulation properties.

Erfindungsgemäss werden diese Aufgaben mit den Merkmalen des Anspruchs 1 gelöst.According to the invention, these objects are achieved with the features of claim 1.

Ein vorteilhafter Abstandhalter für die Beabstandung von Glasscheiben eines mehrfachverglasten Fensters umfasst eine Aussenhülle. Diese Aussenhülle schliesst das Trocknungsmittel zumindest teilweise ein und das Trocknungsmittel ist mindestens in einem ersten Rohprodukt von der Aussenhülle allseitig umschlossen. Im Endprodukt ist das Trocknungsmittel durch die silikonfreie Aussenhülle zumindest teilweise eingeschlossen.An advantageous spacer for the spacing of glass panes of a multi-glazed window comprises an outer shell. This outer shell at least partially encloses the desiccant and the desiccant is enclosed on all sides by the outer shell at least in a first crude product. In the end product, the drying agent is at least partially enclosed by the silicone-free outer shell.

In einer ersten Variante der Erfindung ist die Aussenhülle durch Coextrusion einer Kunststoffmatrix mit dem Trocknungsmittel hergestellt. Die Herstellung durch Coextrusion erlaubt eine flexible Materialwahl: Das Material kann hinsichtlicht Farbe oder hinsichtlich von Eigenschaften für die Dampfsperrfunktion oder für Kleber zum Kontakt mit Glasscheiben frei gewählt werden.In a first variant of the invention, the outer shell is produced by coextrusion of a plastic matrix with the desiccant. Production by coextrusion allows a flexible choice of material: the material can be chosen freely in terms of color or in terms of properties for the vapor barrier function or for adhesives for contact with glass panes.

In einer zweiten Variante umfasst ein Abstandhalter ein Trocknungsmittel mit einer Aussenhülle und einer im Vergleich zur Aussenhülle poröseren Innenstruktur. Die Aussenhülle und die Innenstruktur sind aus einer Komponente hergestellt, typischerweise aus einer Polymermatrix, in welche ein Trocknungsmittel eingebracht ist. Es hat sich herausgestellt, dass sich bei einer Monoextrusion automatisch eine Aussenhülle ausbildet, welche den poröseren Innenteil umschliesst. Die Aussenhülle weist eine glatte, weniger poröse Oberfläche auf. Die Aussenhülle hat aufgrund ihrer geringen Porösität eine kleinere Wasserdampfdurchlässigkeit und schützt so das Trocknungsmittel während der Lagerung. Der glatten Aussenstruktur kommt damit eine gewisse Schutzfunktion gegen den Durchtritt von Wasserdampf zu. Um die Wasseraufnahmekapazität der porösen Innenstruktur nicht zu erschöpfen, kann die Komponentenverbindung aus Kunststoff und Trocknungsmittel nach der Monoextrusion aber auch zusätzlich noch Vakuum verpackt, in luftdichten Behältern vorliegen.In a second variant, a spacer comprises a desiccant with an outer shell and an inner structure which is more porous than the outer shell. The outer shell and the inner structure are made of a component, typically of a polymer matrix, in which a desiccant is incorporated. It has been found that in a mono-extrusion automatically forms an outer shell, which encloses the porous inner part. The outer shell has a smooth, less porous surface. The outer shell has a lower water vapor permeability due to their low porosity and thus protects the desiccant during storage. The smooth exterior structure thus has a certain protective function against the passage of water vapor. In order not to exhaust the water absorption capacity of the porous inner structure, the component compound of plastic and desiccant after monoextrusion but also additionally packed vacuum, be present in airtight containers.

Im Endprodukt besteht in beiden Varianten zwischen der porösen Innenstruktur und der Umgebungsatmosphäre in mindestens einem Bereich, vorzugsweise einer Seite des Abstandhalters, eine Gas- und Wasserdampfverbindung mit einer Aussenseite welche einem Scheibenzwischenraum zuwendbar ist. Eine solche Gas- und Wasserdampfverbindung kann mittels eines porösen Materials oder einer Perforation oder anderen Öffnungen im besagten Bereich, vorzugsweise der besagten Seite, des Abstandhalters in einem Endprodukt ermöglicht werden. Das Trocknungsmittel in der Innenstruktur ist in beiden Varianten in einer Polymermatrix gehalten, welche porös ist. Porös heisst insbesondere poröser und wasserdampfdurchlässiger als die Aussenhülle des Abstandhalters.In the end product in both variants between the porous internal structure and the ambient atmosphere in at least one region, preferably one side of the spacer, a gas and water vapor connection with an outer side which is zuwendbar a disc space. Such gas and water vapor communication may be facilitated by means of a porous material or perforation or other openings in said region, preferably said side, of the spacer in an end product. The drying agent in the inner structure is held in both variants in a polymer matrix which is porous is. Porous means in particular porous and water vapor permeable than the outer shell of the spacer.

Der erfindungsgemässe Abstandhalter weist zudem bevorzugt mindestens eine primäre Dichtung zur stoffschlüssigen Verbindung des Abstandhalters mit mindestens einer Glasscheibe auf, nämlich einen stark adhesiven Kleber. Wahlweise kann der adhäsive Kleber mit einer Schutzfolie abgedeckt sein. Zur Verbesserung der Haftung des stark adhäsiven Klebers kann eine Oberflächenbehandlung am Profil erfolgen, bspw. nach dem Corona- oder Plasmaverfahren.The spacer according to the invention also preferably has at least one primary seal for the material-locking connection of the spacer with at least one glass pane, namely a highly adhesive glue. Optionally, the adhesive adhesive may be covered with a protective film. To improve the adhesion of the strongly adhesive adhesive, a surface treatment on the profile can take place, for example, by the corona or plasma process.

In der ersten Variante liegen mindestens die silikonfreie Aussenhülle und das Trocknungsmittel des Abstandhalters als Verbund durch Coextrusion vor. Durch die Coextrusion der Aussenhülle mit dem Trocknungsmittel liegt dieses als Mehrschichtverbund der beiden Komponenten vor.In the first variant, at least the silicone-free outer shell and the drying agent of the spacer are present as a composite by coextrusion. Due to the coextrusion of the outer shell with the desiccant this is present as a multi-layer composite of the two components.

In einer bevorzugten Ausführungsform dieser ersten Variante ist der Abstandhalter vollständig aus Materialien gefertigt, die nach der Formgebung keine oder nur eine vernachlässigbare Ausgasung haben, insbesondere ist der Abstandhalter vollständig Silikonfrei.In a preferred embodiment of this first variant of the spacer is made entirely of materials that have no or only a negligible outgassing after molding, in particular, the spacer is completely silicone-free.

Um Silikon sicher gegenüber so genanntem "Fogging" zu machen, wird das Material nach der Extrusion in der Regel durch Tempern veredelt. Dabei besteht die Gefahr der Beladung des Trocknungsmittels. Dies ist ein weiterer Vorteil des Verzichts auf Silikon.To make silicone safe against so-called "fogging", the material is usually refined by tempering after extrusion. There is a risk of loading the drying agent. This is another benefit of not using silicone.

Durch diesen Verbund entfällt die Notwendigkeit einer späteren Bestückung des Abstandhalters mit einem Trocknungsmittel. Ausserdem kann bei der Herstellung das Trocknungsmittel soweit wie gewünscht diffusionsarm von der Aussenhülle umschlossen werden.This composite eliminates the need for a later assembly of the spacer with a desiccant. In addition, the drying agent can be enclosed as far as desired low diffusion of the outer shell during manufacture.

Dies gestattet eine Lagerung des erfindungsgemässen Abstandhalters bei atmosphärischen Bedingungen, ohne dass sich die Wasserabsorptionseigenschaften des Trocknungsmittels durch den in der atmosphärischen Luft befindlichen Wasserdampf erschöpft. Der erfindungsgemässe Abstandhalter gestattet somit die Lagerung desselben bis zur Isolierglasherstellung.This allows storage of the inventive spacer at atmospheric conditions without exhausting the water absorption properties of the drying agent by the water vapor present in the atmospheric air. The inventive spacer thus allows the same storage until the manufacture of insulating glass.

In der zweiten Variante weist die Aussenhülle im Wesentlichen eine geringe Wasserdampfdurchlässigkeit auf und liegt als Verbund durch Monoextrusion mit der porösen Innenstruktur vor. Durch die Verwendung einer Monoextrusion, welche eine Komponentenverbindung mit zwei unterschiedlichen Strukturen zur Folge hat, können Abstandhalter kosteneffizient produziert werden, da im Gegensatz zu einer Coextrusion nur ein Materialgemisch verwendet wird.In the second variant, the outer shell substantially has a low water vapor permeability and is present as a composite by mono-extrusion with the porous inner structure. By using a monoextrusion which results in a component compound having two different structures, spacers can be produced cost-efficiently since, unlike coextrusion, only one material mixture is used.

Durch das direkte extrudieren einer Polymerstruktur, welche das Trocknungsmittel beinhaltet, entfällt die Notwendigkeit den Abstandhalter im Nachhinein mit einem Trocknungsmittel zu bestücken. Da die Aussenhülle eine im Wesentlichen geringe Wasserdampfdurchlässigkeit aufweist ist zudem eine Lagerung bei atmosphärischen Bedingungen möglich.By directly extruding a polymer structure containing the desiccant, there is no need to subsequently load the spacer with a desiccant. Since the outer shell has a substantially low water vapor permeability also storage under atmospheric conditions is possible.

Die Feuchtigkeitsaufnahme von Trocknungsmitteln ist typischerweise genormt. Zeolit Trocknungsmittel verfügen typischerweise über eine Wasseraufnahmekapazität von 20%. Aufgrund der Schutzfunktion der Aussenhülle bleibt die Anfangsbelastung des Trocknungsmittels mit Wasser klein und dieser Wert auch bei Lagerung oder Wasserkühlung beim Profilextrusionsprozess erhalten. Es hat sich gezeigt, dass insbesondere bei der Monoextrusion einer Trocknungsmittelmatrix aus TPE die Wasserdampfaufnahme in das innerhalb der Aussenhülle vorhandene Trocknungsmittel viel langsamer erfolgt als bei bekannten Abstandhaltern. Bei einer Normbeladung beträgt bei einem erfindungsgemässen Abstandhalter aus TPE die Wasserdampfaufnahme nach einem Monat 5%, während der gleiche Wert bei bekannten silikonbasierten Abstandhaltern über 8% beträgt. Die erfindungsgemässen Abstandhalter sind daher hinsichtlich Wasserdampfaufnahme bei Herstellung und Lagerung viel unkritischer.The moisture absorption of desiccants is typically standardized. Zeolite desiccants typically have a water holding capacity of 20%. Due to the protective function of the outer shell, the initial load of the desiccant with water remains small and this value is also retained during storage or water cooling in the profile extrusion process. It has been shown that, especially in the case of monoextrusion of a desiccant matrix of TPE, the absorption of water vapor into the desiccant present inside the outer shell takes place much more slowly than with known spacers. For a standard load in the case of a TPE spacer according to the invention, the water vapor absorption after one month is 5%, while the same value in known silicone-based spacers is more than 8%. The spacers according to the invention are therefore much less critical in terms of water vapor absorption during production and storage.

Auch das Herstellungsverfahren für erfindungsgemässe Abstandhalter kann effizienter gestaltet werden. Insbesondere ist es möglich durch einfache Wasserbadkühlung die Extrusionsgeschwindigkeit zu erhöhen, ohne die Wasseraufnahmefähigkeit des Trockenmittels wesentlich zu schädigen.The production method for inventive spacers can be made more efficient. In particular, it is possible by simple Wasserbadkühlung to increase the extrusion rate, without significantly damaging the water absorbency of the desiccant.

In einer bevorzugten Ausführungsform der ersten Variante liegt der Abstandhalter als Verbund durch Coextrusion eines thermoplastischen Materials mit einer mit dem Trocknungsmittel angereicherten Kunststoff-Matrix vor.In a preferred embodiment of the first variant, the spacer is present as a composite by coextrusion of a thermoplastic material with a plastic matrix enriched with the desiccant.

In einer bevorzugten Ausführungsform der zweiten Variante liegt der Abstandhalter als Monoextrusion eines in einer Kunststoff-Matrix enthaltenen Trocknungsmittels vor, was eine Aussenhülle und eine im Vergleich porösere Innenstruktur zur Folge hat.In a preferred embodiment of the second variant, the spacer is present as a monoextrusion of a drying agent contained in a plastic matrix, which results in an outer shell and a porous structure that is more porous in comparison.

In einer weiteren bevorzugten Variante beider Ausführungsformen liegt die mindestens eine primäre Dichtung auch als Verbund durch Coextrusion mit der Aussenhülle vor. Vorzugsweise verläuft die primäre Dichtung längsseitig auf der gesamten Länge des Profils. Die so ausgestaltete primäre Dichtung kann somit eine doppelte Funktion erfüllen: den Abstandhalter stoffschlüssig mit einer Glassscheibe verbinden und gleichzeitig als Dichtung die Diffusion von Wasserdampf von Ausserhalb eines Scheibenzwischenraums in den Scheibenzwischenraum verhindern. Es versteht sich von selbst, dass eine primäre Dichtung mit einer solchen Doppelfunktion, d.h. ein Material, welches gleichzeitig ausreichende adhesive Eigenschaften zwischen dem Abstandhalterprofil und einer Glasscheibe aufweist und aber auch ausreichende Dichteigenschaften hat, in Zusammenhang mit anderen Typen von Abstandhaltern und nicht zwingend in coextrudierter Form vorteilhaft sein kann. Zur Erzeugung einer solchen Doppelfunktion wird beispielsweise eine Adhesivbutyl verwendet.In a further preferred variant of both embodiments, the at least one primary seal is also present as a composite by coextrusion with the outer shell. Preferably, the primary seal extends longitudinally along the entire length of the profile. The thus configured primary seal can thus fulfill a dual function: connect the spacer cohesively with a glass pane and at the same time prevent the diffusion of water vapor from outside a space between panes in the space between the panes as a seal. It goes without saying that a primary seal with such a double function, ie, a material which simultaneously has sufficient adhesive properties between the spacer profile and a glass sheet and also has sufficient sealing properties, in connection with other types of spacers and not necessarily in coextruded form can be advantageous. To produce such a double function, for example, an adhesive butyl is used.

Es ist aber alternativ auch denkbar, in an sich bekannter Art und Weise eine Klebefolie (Bevorzugt ein Acrylat-Adhesivtape) zu verwenden, welche zum Positionieren und Fixieren des Abstandhalters gegenüber einer Glasscheibe während der Produktion eines Isolierglases dient. Um die Haftung des Adhesivbandes zu verbessern, kann der Abstandhalter ausserdem zumindest im Bereich, der mit dem Adhesivband versehen wird, einer Coronabehandlung unterzogen werden. Das Adhesivband kann mit einer Abdeckfolie versehen sein, welche vor der Verwendung des Abstandhalters abgezogen werden kann.Alternatively, however, it is also conceivable to use, in a manner known per se, an adhesive film (preferably an acrylate adhesive tape) which serves for positioning and fixing the spacer in relation to a glass pane during the production of an insulating glass. In order to improve the adhesion of the adhesive tape, the spacer can also be subjected to a corona treatment at least in the region which is provided with the adhesive tape. The adhesive tape may be provided with a cover sheet which may be peeled off before use of the spacer.

Vorzugsweise weist der erfindungsgemässe Abstandhalter eine im Profil im Wesentlichen vier kantige Form auf. In einer bevorzugten Ausführungsform weist der Profilquerschnitt eines erfindungsgemässen Abstandhalters eine im Wesentlichen rechteckige Form auf mit einer ersten Seitenlänge von zwischen 6 und 24 mm, und besonders bevorzugt 12 bzw. 16 mm Seitenlänge auf. Die Seitenlänge hängt insbesondere auch von der geplanten Anwendung ab: bei Anwendungen für Dreifachverglasungen sind typischerweise Gesamtbreiten von 12 - 30 mm bevorzugt. Bevorzugt weist eine zweite Seite eine Seitenbreite von zwischen 6 bis 16 mm, weiter bevorzugt 6 bis 8 mm.Preferably, the spacer according to the invention has an essentially four-edged shape in profile. In a preferred embodiment, the profile cross section of a spacer according to the invention has a substantially rectangular shape with a first side length of between 6 and 24 mm, and particularly preferably 12 or 16 mm side length. The page length also depends in particular on the intended application: in applications for triple glazing, overall widths of 12-30 mm are typically preferred. Preferably, a second side has a side width of between 6 to 16 mm, more preferably 6 to 8 mm.

Die Materialien des Abstandhalters sind vorzugsweise so ausgewählt, dass sie einen im Wesentlichen flexiblen Abstandhalter ergeben, der eine automatisierte Produktion von mehrfachverglasten Fenstern ermöglicht und zur Lagerung auf Rollen aufgewickelt werden kann. Die Fertigung der mehrfachverglasten Fenster kann anschliessend per Roboter erfolgen.The materials of the spacer are preferably selected to be a substantially flexible spacer resulting in an automated production of multi-glazed windows and can be wound up for storage on wheels. The production of multi-glazed windows can then be done by robot.

In einer weiteren bevorzugten Ausführungsform weist der Abstandhalter mindestens eine Dampfsperre zur Verhinderung von Wasserdampfdiffusion auf einer Seite des Abstandhalters auf. Bevorzugt soll die Dampfsperre die Diffusion von Wasserdampf durch die Seite die bei einer Montage gegen Aussen weist, d.h. dem Rahmen zugewandt ist, verhindern. Eine erfindungsgemässe Dampfsperre kann eine Folie sein, die nach der Extrusion aufgeklebt wird. Bevorzugt wird die Dampfsperre erzeugt, indem ein dampfundurchlässiger Kunststoff im Coextrusionsverfahren mit der Aussenhülle und dem Trocknungsmittel bzw. der Polymermatrix als Verbund erzeugt wird. Alternativ kann die Dampfsperre in Form einer metallischen Walzfolie und/oder sputter-bedampften metallischen oder glasartigen Schicht vorliegen. Besonders bevorzugt ist eine Dampfsperre, welche als Laminat vorliegt, insbesondere aus einer PE Schicht, auf welche wenigstens eine PET-SiOx Schicht aufgebracht ist. Bevorzugt sind zwei PET-SiOx Schichten. Die PE Schicht lässt sich gut mit der Aussenhülle eines Abstandhalters aus TPE verbinden, insbesondere verschweissen. Gleichzeitig bildet die PET-SioX Schicht einen guten Kontakt für üblicherweise verwendete Primärdichtungen, z.B. Butylkleber. Eine solche Dampfsperre lässt sich insbesondere unmittelbar nach oder während der Extrusion auftragen. Die Verschweissung erfolgt dabei bevorzugt unmittelbar nach der Extrusion des Profils.In a further preferred embodiment, the spacer has at least one vapor barrier to prevent water vapor diffusion on one side of the spacer. Preferably, the vapor barrier is intended to prevent the diffusion of water vapor through the side facing the outside during assembly, i. the frame faces prevent. A vapor barrier according to the invention may be a film which is adhered after extrusion. The vapor barrier is preferably produced by producing a vapor-impermeable plastic by coextrusion with the outer shell and the drying agent or the polymer matrix as a composite. Alternatively, the vapor barrier may be in the form of a metallic rolled foil and / or sputter-coated metallic or glassy layer. Particularly preferred is a vapor barrier, which is present as a laminate, in particular of a PE layer, on which at least one PET-SiOx layer is applied. Preference is given to two PET-SiOx layers. The PE layer can be easily connected to the outer shell of a TPE spacer, in particular welded. At the same time, the PET-SioX layer forms good contact for commonly used primary seals, e.g. Butyl adhesive. Such a vapor barrier can be applied in particular immediately after or during the extrusion. The welding is preferably carried out immediately after the extrusion of the profile.

Dazu kann beispielsweise eine Verschweissung auf drei Flanken unter Anwendung eines Leister Heissluftgerätes erfolgen.This can be done, for example, a weld on three flanks using a Leister hot air device.

Alternativ kann beispielsweise die Extrusionsdüse selbst mit einer Zuführung für die Dampfsperre versehen sein. Insbesondere Foliendicken unter einer zulässigen Spannungsgrenze können innerhalb des Werkzeugs direkt mit der Kunststoffschmelze verbunden werden. In einer weiteren Alternative wird die Folie direkt nach der Düse während der Entspannungsphase an das extrudierte Profil geführt.Alternatively, for example, the extrusion die itself may be provided with a feed for the vapor barrier. In particular, film thicknesses below a permissible stress limit can be connected directly to the plastic melt within the tool. In another alternative, the film is fed directly after the die during the relaxation phase to the extruded profile.

In einer bevorzugten Ausführungsform weist der Abstandhalter eine erste, im Wesentlichen ebene Grundfläche und eine zweite, im Wesentlichen ebene gegenüberliegende Grundfläche auf. Bevorzugt ist die erste Grundfläche im Endprodukt im Wesentlichen durchlässig für Wasserdampf und die zweite Grundfläche im Wesentlichen undurchlässig für Wasserdampf. Bei der Montage wird die erste Grundfläche so ausgerichtet, dass sie zum Scheibenzwischenraum weist und die zweite Grundfläche zum Fensterrahmen weist.In a preferred embodiment, the spacer has a first, substantially flat base surface and a second, substantially flat opposite base surface. Preferably, the first base in the final product is substantially permeable to water vapor and the second base is substantially impermeable to water vapor. During assembly, the first base is aligned so that it faces the space between the panes and the second base faces the window frame.

Im Sinne der vorliegenden Erfindung findet eine Unterscheidung statt, zwischen einem handelbaren Rohprodukt und einem handelbaren Endprodukt des erfindungsgemässen Abstandhalters. Im Rohprodukt ist die Diffusion von Wasserdampf zur Innenstruktur, welche das Trocknungsmittel beinhaltet, erschwert. Dies erfolgt durch eine diffusionsdichte Aussenhülle in der ersten Ausführungsform oder durch eine weniger poröse, glatte Aussenhülle in der zweiten Ausführungsform. Das Endprodukt, d.h. der bei oder kurz vor der Montage "aktivierte" Abstandhalter ermöglicht auf mindestens einer Seite, welche einem Scheibenzwischenraum zwischen zwei Glasscheiben zugewandt ist, die Diffusion von Wasserdampf in das Innere des Abstandhalters besser.For the purposes of the present invention, a distinction between a tradable crude product and a tradable end product of the inventive spacer takes place. In the crude product, the diffusion of water vapor to the internal structure, which includes the desiccant, difficult. This is done by a diffusion-tight outer shell in the first embodiment or by a less porous, smooth outer shell in the second embodiment. The end product, ie the "activated" at or shortly before mounting spacers allows on at least one side, which faces a disc space between two glass panes, the diffusion of water vapor into the interior of the spacer better.

In einer bevorzugten Ausführungsform weist die erste Grundfläche mindestens eine Öffnung, insbesondere eine oder mehrere Perforationen auf.In a preferred embodiment, the first base area has at least one opening, in particular one or more perforations.

In einer weiteren bevorzugten Ausführungsform weist die zweite Grundfläche die Dampfsperre auf. Die Dampfsperre ist bevorzugt ein Laminat aus PE und wenigstens einer PET-SiOx Schicht. Alternativ sind aber auch metallische Walzfolien denkbar, insbesondere Walzfolien umfassend Aluminium oder eine Edelstahlfolie. Ebenfalls denkbar ist eine aufgedampfte Metallschicht.In a further preferred embodiment, the second base has the vapor barrier. The vapor barrier is preferably a laminate of PE and at least one PET-SiOx layer. Alternatively, however, metallic rolled foils are also conceivable, in particular rolled foils comprising aluminum or a stainless steel foil. Also conceivable is a vapor-deposited metal layer.

In einer bevorzugten Ausführungsform der ersten Variante weist die mit der Trocknungsmittelmatrix coextrudierte Aussenhülle kein Silikon auf, insbesondere weist sie ein thermoplastisches Elastomer auf, oder besteht im Wesentlichen daraus, ausgewählt aus der Gruppe bestehend aus: TPS (Styrol-Block-Copolymere), TPC (thermoplastische Polyesterelastomere), TPV (vernetzte thermoplastische Olefin Elastomere), TPU (thermoplastische Polyurethan Elastomere) und TPA (thermoplastische Polyamid Elastomere).In a preferred embodiment of the first variant, the outer shell co-extruded with the desiccant matrix has no silicone, in particular it comprises or consists essentially of a thermoplastic elastomer selected from the group consisting of: TPS (styrene block copolymers), TPC ( thermoplastic polyester elastomers), TPV (crosslinked thermoplastic olefin elastomers), TPU (thermoplastic polyurethane elastomers) and TPA (thermoplastic polyamide elastomers).

In einer besonders bevorzugten Ausführungsform kann der Aussenhülle insbesondere aus TPV, zusätzlich vergütete Kreide und/oder Talk beigemischt wird. Dadurch kann die Shore Härte reduziert werden.In a particularly preferred embodiment, the outer shell, in particular TPV, additionally tempered chalk and / or talc is added. This can reduce the Shore hardness.

Bevorzugt weist das thermoplastische Elastomer mindestens eine, vorzugsweise alle der folgenden Eigenschaften auf:
Die Shore Härte liegt zwischen 60 ShA und 75 ShA, bevorzugt zwischen 65 ShA und 70 ShA.
Preferably, the thermoplastic elastomer has at least one, preferably all of the following properties:
The Shore hardness is between 60 ShA and 75 ShA, preferably between 65 ShA and 70 ShA.

Es ist durch Extrusion verarbeitbar.It is processable by extrusion.

Es weist nur eine minime, beziehungsweise vernachlässigbare Ausgasung auf und/oder ist im Wesentlichen Lösungsmittelfrei. Akzeptable Ausgasungs- und Foggingwerte können der DIN-Norm EN 1279-6 entnommen werden,It has only a minimum, or negligible outgassing and / or is substantially free of solvent. Acceptable outgassing and fogging values can be found in the DIN standard EN 1279-6,

Es ist mit den bekannten Isolierglasdichtstoffen kompatibel, insbesondere mit Butyl, Polyurethan, Polysulfiden, Silikon oder Hotmelt.It is compatible with the known insulating glass sealants, in particular with butyl, polyurethane, polysulfides, silicone or hotmelt.

Es weist eine Temperaturbeständigkeit von -20°C bis 80°C auf.It has a temperature resistance of -20 ° C to 80 ° C.

Es verfügt über eine geringe, respektive vernachlässigbare Wärmeausdehnung und Wärmeleitung.It has a low, respectively negligible thermal expansion and heat conduction.

Es ist im Wesentlichen UV-beständig.It is essentially UV resistant.

Es ist im Wesentlichen farbbeständig über einen Zeitraum von bis zu 20 Jahren und unter Einwirkung von UV-Licht.
Es verfügt über eine geringe, respektive vernachlässigbare Wasserdampfdurchlässigkeit.
It is essentially color-stable over a period of up to 20 years and under the influence of UV light.
It has a low, respectively negligible water vapor permeability.

Es verfügt über eine geringe, respektive vernachlässigbare Gasabsorption, insbesondere Argonabsorption.It has a low, respectively negligible gas absorption, in particular argon absorption.

Es verfügt vorzugsweise über eine Lebensdauer von mehr als 20 Jahren.It preferably has a lifetime of more than 20 years.

Als besonders geeignet haben sich UV-stabilisierte, organische Materialien wie z. B. TPE Olefine und TPU Elastomere herausgestellt. Sie zeichnen sich durch eine geringe Wasserdampf-Permeation aus. Weiter bevorzugt können TPA Polyamide oder adaptierte biopolymere Kompounds verwendet werden, welche die obigen Bedingungen erfüllen.Particularly suitable are UV-stabilized, organic materials such. As TPE olefins and TPU elastomers exposed. They are characterized by a low water vapor permeation. More preferably, TPA polyamides or adapted biopolymer compounds can be used which satisfy the above conditions.

In einer bevorzugten Ausführungsform der zweiten Variante besteht die Polymermatrix für das Trocknungsmittel aus Komponenten der Olefinic TPE Gruppe, insbesondere aus Infuse 9007 des Herstellers DOW.
In einer besonders bevorzugten Ausführungsform wird der Polymermatrix (insbesondere aus Olefic TPE) Kreide und/oder Talk beigemischt wird. Dadurch kann die Shore Härte reduziert werden.
In a preferred embodiment of the second variant, the polymer matrix for the drying agent consists of components of the Olefinic TPE group, in particular from Infuse 9007 of the manufacturer DOW.
In a particularly preferred embodiment, the polymer matrix (in particular from Olefic TPE) is mixed with chalk and / or talc. This can reduce the Shore hardness.

Bevorzugt weist die monoextrudierte Polymermatrix mindestens eine, vorzugsweise alle der folgenden Eigenschaften auf:
Die Shore Härte liegt zwischen 60 ShA und 75 ShA, bevorzugt zwischen 65 ShA und 70 ShA.
Preferably, the mono-extruded polymer matrix has at least one, preferably all, of the following properties:
The Shore hardness is between 60 ShA and 75 ShA, preferably between 65 ShA and 70 ShA.

Sie ist durch Extrusion verarbeitbar.It can be processed by extrusion.

Sie ist mit den bekannten Isolierglasdichtstoffen kompatibel, insbesondere mit Butyl, Polyurethan, Polysulfiden, Silikon oder Hotmelt.It is compatible with the known insulating glass sealants, in particular with butyl, polyurethane, polysulfides, silicone or hotmelt.

Sie weist eine Temperaturbeständigkeit von -20°C bis 80°C auf.It has a temperature resistance of -20 ° C to 80 ° C.

Sie verfügt über eine geringe, respektive vernachlässigbare Wärmeausdehnung und Wärmeleitung.It has a low, respectively negligible thermal expansion and heat conduction.

Sie ist im Wesentlichen farbbeständig über einen Zeitraum von bis zu 20 Jahren und unter Einwirkung von UV-Licht.It is essentially color-stable over a period of up to 20 years and under the influence of UV light.

Sie beinhaltet eine durch Monoextrusion entstehende Aussenhülle, welche über eine geringe, respektive vernachlässigbare Wasserdampfdurchlässigkeit verfügt.It contains an outer shell created by mono-extrusion, which has a low, respectively negligible water vapor permeability.

Sie verfügt über eine geringe, respektive vernachlässigbare Gasabsorption, insbesondere Argonabsorption.It has a low, respectively negligible gas absorption, in particular argon absorption.

Sie verfügt vorzugsweise über eine Lebensdauer von mehr als 20 Jahren.It preferably has a lifetime of more than 20 years.

In beiden Varianten ist es ausserdem denkbar, der Trocknungsmittelmatrix weitere Komponenten beizufügen, beispielsweise zur Erhöhung der UV Stabilität. Denkbar ist beispielsweise Desmopan DP 9370AU des Herstellers Bayer.In both variants, it is also conceivable to add further components to the desiccant matrix, for example to increase the UV stability. Conceivable, for example, Desmopan DP 9370AU of the manufacturer Bayer.

In einer bevorzugten Ausführungsform wird die primäre Dichtung aus einem Klebstoff ausgewählt aus der Gruppe der Butyl, - Acrylat und Hotmelt-Klebstoffe. Wenn die primäre Dichtung als Klebstoff ausgebildet ist kann sie gleichzeitig zwei Funktionen übernehmen: einerseits ist die Dichtung zum dichten in an sich bekannter Art und Weise nützlich. Gleichzeitig übernimmt sie eine Positionierungsfunktion bei der Isolierglasmontage. Statt wie bisher zwei verschiedene Materialien (Acrylat zur Positionierung und Butyl zur Dichtung) kann die primäre Dichtung beide Funktionen erfüllen. Selbstverständlich ist diese Lösung auch im Zusammenhang mit anderen Abstandhaltern vorteilhaft einsetzbar.In a preferred embodiment, the primary seal is selected from the group consisting of butyl, acrylate and hot melt adhesives. If the primary seal is designed as an adhesive, it can simultaneously perform two functions: on the one hand, the seal is useful for sealing in a manner known per se. At the same time it assumes a positioning function in the insulating glass assembly. Instead of two different materials (acrylic for positioning and butyl for sealing), the primary seal can fulfill both functions. Of course, this solution can also be used advantageously in connection with other spacers.

Ein erfindungsgemässer Abstandhalter kann entsprechend der Kontur des Glases angepasst werden. Der Abstandhalter ist vorzugsweise einstückig ausgebildet. Dadurch wird das gesamte Handling während der Montage erleichtert. Ausserdem ist durch die einstückige Ausbildung des Abstandhalters eine besonders kostengünstige Herstellung möglich.A spacer according to the invention can be adapted according to the contour of the glass. The spacer is preferably formed in one piece. This facilitates all handling during assembly. In addition, a particularly cost-effective production is possible by the integral formation of the spacer.

In einer weiteren bevorzugten Ausführungsform weist der Abstandhalter neben seiner im Wesentlichen rechteckigen Grundform eine Ausnehmung, insbesondere eine Nut, zur Aufnahme einer Glasscheibe auf. Ein derart ausgestalteter Abstandhalter ist besonders geeignet, um die mittlere Glasscheibe eines dreifachverglasten Fensters aufzunehmen. Vorzugsweise weist ein solcher Abstandhalter ausserdem einen Teil der primären Dichtung in dieser Nut auf.In a further preferred embodiment, the spacer in addition to its substantially rectangular basic shape has a recess, in particular a groove, for receiving a glass pane on. A spacer designed in this way is particularly suitable for receiving the middle glass pane of a triple-glazed window. Preferably, such a spacer also has a portion of the primary seal in this groove.

Im Zusammenhang mit Dreifachverglasungen kann insbesondere ein Abstandhalter verwendet werden, welcher eine Grundform wie in WO 2010/11545 gezeigt aufweist. Durch das Coextrudieren oder das Monoextrudieren ist es ausserdem denkbar, den Abstandhalter auf einfache Art und Weise mit weiteren Formmerkmalen zu versehen. Besonders bevorzugt kann der Abstandhalter ein Formmerkmal aufweisen, welches bezogen auf die mittlere Aufnahme des Abstandshalters eine genau definierte Position aufweist und welches zum Positionieren des Abstandhalters beim Einsetzen der mittleren Scheibe dient. Dieses Formmerkmal kann typischerweise als Spurrille an der der Seite zur Aufnahme der mittleren Scheibe abgewandten Seite ausgebildet sein. Während ein solches Formmerkmal in Zusammenhang mit erfindungsgemässen Abstandhaltern besonders bevorzugt ist, versteht es sich von selbst, dass es auch bei anderen Abstandhaltern für Dreifachverglasungen vorteilhaft sein kann.In connection with triple glazing in particular a spacer can be used, which has a basic shape as in WO 2010/11545 has shown. By co-extruding or mono-extruding, it is also conceivable to provide the spacer in a simple manner with further shape features. Particularly preferably, the spacer may have a shape characteristic, which has a precisely defined position relative to the central receptacle of the spacer and which serves for positioning the spacer when inserting the middle pane. This shape feature may typically be formed as a track groove on the side facing away from the side for receiving the middle disc. While such a shape feature is particularly preferred in connection with inventive spacers, it goes without saying that it can also be advantageous for other spacers for triple glazing.

In einer bevorzugten Ausführungsform der ersten Variante dieser für dreifachverglasungen geeigneten Abstandhalter weist die Aussenhülle zwei Kammern mit Trocknungsmittel auf, welche als Verbund durch Coextrusion mit der Aussenhülle vorliegen.In a preferred embodiment of the first variant of these spacers suitable for triple glazing, the outer shell has two chambers with desiccant which are present as a composite by coextrusion with the outer shell.

In einer weiteren Ausführungsform der vorliegenden Erfindung weist der Abstandhalter auf der ersten ebenen Grundfläche mindestens eine Schwächungsstelle auf, die bei oder kurz vor der Isolierglasherstellung perforiert wird und dadurch Gas- und Wasserdampfdurchlässigkeit der ersten ebenen Grundfläche zum Trocknungsmittel gewährleistet. Eine solche Schwächungsstelle kann durch eine im Vergleich zur umgebenden Wandstärke dünneren Wandstärke der Aussenhülle erzielt werden. Besonders bevorzugt ist so eine Schwächung bei der ersten Variante. Sie kann aber auch bei der zweiten Variante vorteilhaft sein.In a further embodiment of the present invention, the spacer on the first flat base has at least one weakening point which is perforated at or shortly before the production of insulating glass and thereby gas and water vapor permeability of the first flat base to the desiccant guaranteed. Such a weakening point can be achieved by a thinner compared to the surrounding wall thickness wall thickness of the outer shell. Such a weakening in the first variant is particularly preferred. But it can also be advantageous in the second variant.

Dies hat den Vorteil, dass das Trocknungsmittel während und nach der Herstellung des Abstandhalters von der Aussenhülle geschützt wird und sich die Wasserabsorptionsfähigkeit des Trocknungsmittels nicht vorzeitigt erschöpft.This has the advantage that the drying agent is protected during and after the preparation of the spacer from the outer shell and the water absorption capacity of the drying agent is not prematurely exhausted.

Das Trocknungsmittel kann vorzugsweise als Matrix in einem Kunststoff vorliegen. Besonders geeignet sind Trocknungsmittel auf der Basis von Molekularsieben, insbesondere Silikagele und Zeolithe.The drying agent may preferably be present as a matrix in a plastic. Particularly suitable are drying agents based on molecular sieves, in particular silica gels and zeolites.

Die Aussenhülle gewährleistet in erster Hinsicht UV-Beständigkeit, Elastizität und eine hohe Formstabilität. In einer bevorzugten Ausführungsform kann das Trocknungsmittel bis zu 40, vorzugsweise bis zu 70%, weiter vorzugsweise bis zu 90% des Querschnitts des Abstandhalters ausmachen. Die Aussenhülle weist eine Wandstärke von 1 ± 0,5mm auf.The outer shell ensures UV resistance, elasticity and a high dimensional stability in the first place. In a preferred embodiment, the desiccant may comprise up to 40, preferably up to 70%, more preferably up to 90%, of the cross-section of the spacer. The outer shell has a wall thickness of 1 ± 0.5mm.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft ein Verfahren zur Herstellung eines Abstandhalters, insbesondere eines Abstandhalters wie oben beschrieben.Another aspect of the present invention relates to a method for producing a spacer, in particular a spacer as described above.

Eine silikonfreie Aussenhülle und eine im Vergleich zur Aussenhülle porösere Innenstruktur, welche das Trocknungsmittel enthält, werden extrudiert, so dass die poröse Innenstruktur vollständig durch die Aussenhülle umschlossen wird.A silicone-free outer shell and a more porous in comparison to the outer shell inner structure containing the desiccant are extruded, so that the porous inner structure is completely enclosed by the outer shell.

In einer ersten Variante werden eine silikonfreie Aussenhülle und ein Trocknungsmittel mittels einer Profil-Mehrfachdüse coextrudiert, sodass das Trocknungsmittel durch die Aussenhülle vollständig und diffusionsdicht umschlossen wird.In a first variant, a silicone-free outer shell and a drying agent are coextruded by means of a profile multi-nozzle, so that the drying agent is enclosed by the outer shell completely and diffusion-tight.

Eine geeignete Profildüse ist zum Beispiel in US 5851609 gezeigt. Eine geeignete Profildüse weist mehrere Kanäle auf, um die einzelnen Komponenten zu extrudieren.A suitable profile nozzle is for example in US 5851609 shown. A suitable profile nozzle has multiple channels to extrude the individual components.

In einer zweiten Variante werden die Aussenhülle und die Innenstruktur so monoextrudiert, dass eine im Vergleich zur Aussenhülle porösere Innenstruktur entsteht, welche von der Aussenhülle vollständig umschlossen wird.In a second variant, the outer shell and the inner structure are mono-extruded in such a way that a more porous interior structure is created compared to the outer shell, which is completely enclosed by the outer shell.

Nach der Extrusion wird bevorzugt in beiden Ausführungsformen die Aussenhülle an mindestens einer Stelle luft- und dampfdurchlässig gemacht. In der zweiten Variante kann je nach Porosität der Aussenhülle auch auf diesen Schritt verzichtet werden.After extrusion, in both embodiments, the outer shell is preferably rendered air and vapor permeable at at least one point. In the second variant, this step can be dispensed with depending on the porosity of the outer shell.

Dieser Schritt kann bis zur Isolierglasherstellung aufgeschoben werden.This step can be postponed until the production of insulating glass.

Durch das erfindungsgemässe Verfahren kann die Extrusion mit Wasserkühlung stattfinden, ohne dass dabei das Trocknungsmittel in seiner Wasseraufnahmekapazität bereits vor der Montage erschöpft wird, weil zu diesem Zeitpunkt das Trocknungsmittel von der Aussenhülle vollständig umschlossen ist. Dadurch lässt sich wesentlich effizienter und mit einer höheren Durchsatzleistung extrudieren.By means of the method according to the invention, the extrusion can take place with water cooling, without the drying agent being exhausted in its water absorption capacity even before assembly, because at that time the drying agent is completely enclosed by the outer shell. This makes it possible to extrude much more efficiently and with higher throughput.

In einer bevorzugten Ausführungsform wird die Aussenhülle im Anschluss an die Extrusion an mindestens einer Stelle perforiert, sodass eine Öffnung entsteht.In a preferred embodiment, the outer shell is perforated after the extrusion at least one point, so that an opening is formed.

In einer weiteren bevorzugten Ausführungsform wird die Aussenhülle mit einer Schwächungssstelle extrudiert, die im Anschluss an die Extrusion an mindestens einer Stelle geöffnet wird, sodass eine Öffnung entsteht.In a further preferred embodiment, the outer shell is extruded with a weakening point, which is opened at least one point after the extrusion, so that an opening is formed.

Eine solche Schwächungsstelle kann zum Beispiel durch eine Profildüse hergestellt werden, die so ausgestaltet ist, dass eine Schwächungsstelle, insbesondere eine Stelle mit verringerter Wandsärke extrudiert wird. Dadurch lässt sich die entsprechende Stelle der Aussenhülle leichter perforieren.Such a weakening point can be produced, for example, by a profiled nozzle which is designed such that a weakening point, in particular a point with reduced wall thickness, is extruded. This makes it easier to perforate the corresponding point of the outer shell.

In einer bevorzugten Ausführungsform umfasst die Extrusion zusätzlich die Extrusion einer Dichtung, insbesondere einer Dichtung umfassend einen Butyl-, Acrylat, oder Hotmelt-Klebstoff.In a preferred embodiment, the extrusion additionally comprises the extrusion of a seal, in particular a seal comprising a butyl, acrylate, or hot melt adhesive.

In einer besonderen Ausführungsform wird der Teil der Aussenhülle der dem Scheibenzwischenraum zugewandt ist erst bei der Montage luft- und dampfdurchlässig gemacht, indem zum Beispiel bei der Verarbeitung der besagte Teil durch einen Fertigungsroboter perforiert. Dies kann an Schwächungsstellen passieren.In a particular embodiment, the part of the outer shell which faces the space between the panes is rendered air and vapor permeable only during assembly, for example by perforating the said part during processing by means of a production robot. This can happen at weak points.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft ein mehrfachverglastes Fenster mit mindestens zwei voneinander beabstandeten parallelen Glasscheiben und einem zwischen den Glasscheiben zur Beabstandung angebrachten Abstandhalter wie vorgängig beschrieben.Another aspect of the present invention relates to a multi-glazed window having at least two spaced-apart parallel glass panes and a spacer disposed between the panes of glass for spacing as previously described.

Der Abstandhalter ist bevorzugt direkt mit einer Primärdichtung mit der Glasscheibe fixiert.The spacer is preferably fixed directly to a primary seal with the glass.

Bevorzugt wird der Zwischenraum zwischen der ersten und der zweiten Glasscheibe welcher durch den Abstandhalter gebildet wird und ausserhalb am Scheibenzwischenraum liegt mit einer weiteren sekundären Dichtung abgedichtet. Solche sekundären Dichtungen sind im Stand der Technik bekannt. Als besonders geeignet haben sich Polysulfite, Polyurethane und Silikone erwiesen.Preferably, the gap between the first and the second glass sheet is formed by the spacer is sealed off and outside of the space between the panes with another secondary seal. Such secondary seals are known in the art. Polysulfites, polyurethanes and silicones have proved to be particularly suitable.

In einer bevorzugten Ausführungsform umschliesst die Aussenhülle das Trocknungsmittel zum Zeitpunkt, an dem der Abstandhalter auf einer Glasscheibe fixiert wird, noch vollständig. Dadurch umschliesst besonders in der ersten Variante die Aussenhülle die Innenstruktur welche das Trocknungsmittel enthält luft- und dampfdicht.In a preferred embodiment, the outer shell encloses the drying agent at the time at which the spacer is fixed on a glass pane, still completely. As a result, especially in the first variant, the outer shell encloses the inner structure which contains the desiccant airtight and vapor-tight.

Die dem Scheibenzwischenraum zugewandte Kante des Abstandhalters kann in beiden Ausführungsformen luft- und dampfdurchlässig gemacht, indem sie zum Beispiel perforiert wird oder an einer Schwächungsstelle ein Teil der Aussenhülle gelöst wird.The edge of the spacer facing the space between the panes can be rendered permeable to air and steam in both embodiments, for example by being perforated or a part of the outer shell being loosened at a weakening point.

In einer bevorzugten Ausführungsform wird das mehrfachverglaste Fenster in einem automatisierten Prozess mit einem Roboter montiert. Besonders bevorzugt wird erst bei der Isolierglasherstellung durch einen Applikationsroboter perforiert, damit die Trockenmittelbelastung klein und dadurch die Wasseraufnahmekapazität möglichst hoch bleibt.In a preferred embodiment, the multi-glazed window is assembled in an automated process with a robot. Particularly preferred is perforated only in the production of insulating glass by an application robot, so that the desiccant load is small and thus the water absorption capacity remains as high as possible.

Das mehrfachverglaste Fenster umfasst in einer bevorzugten Ausführungsform mindestens zwei Glasscheiben, die durch einen Abstandhalter beabstandet sind und darin einen Scheibenzwischenraum definieren, und einen aussen am Abstandhalter zwischen den Scheiben gelegenen äusseren Zwischenraum. Bevorzugt ist der besagte äussere Zwischenraum mit einer sekundären Dichtung diffusionsdicht versiegelt. Der Abstandhalter umfasst kein Silikon und umfasst insbesondere eine Aussenhülle welche eine Trocknungsmittelmatrix zumindest teilweise einschliesst.The multi-glazed window comprises, in a preferred embodiment, at least two panes of glass spaced apart by a spacer defining a disc space therein, and an outer space located externally on the spacer between the panes. Preferably, said outer space is sealed diffusion-tight with a secondary seal. The spacer comprises no silicone and in particular comprises an outer shell which at least partially encloses a desiccant matrix.

Die Aussenhülle ist in beiden Varianten vorzugsweise so ausgestaltet, dass eine Dampfdiffusion zwischen dem Scheibenzwischenraum und einem in der Trocknungsmittelmatrix eingebetteten Trocknungsmittel ermöglich wird.In both variants, the outer shell is preferably designed such that vapor diffusion between the space between the panes and a drying agent embedded in the drying agent matrix is made possible.

Bedingt durch die Aussenhülle des Abstandhalters ist die Anfangsbeladung des Trocknungsmittels mit Wasser sehr gering. Dadurch erhöht sich auch die Lebensdauer eines mehrfachverglasten Fensters, das mit dem erfindungsgemässen Abstandhalter bestückt ist. Die Bedingungen gemäss Norm EN1279 Teil 2 und Teil 3 werden zuverlässiger und länger erfüllt. Der Argonverlust aus dem Zwischenraum zwischen den Scheiben ist geringer als 1% pro Jahr.Due to the outer shell of the spacer, the initial loading of the desiccant with water is very low. This also increases the life of a multi-glazed window, which is equipped with the inventive spacer. The conditions according to standard EN1279 part 2 and part 3 are more reliable and longer fulfilled. The argon loss from the gap between the disks is less than 1% per year.

In einer bevorzugten Ausführungsform beider Varianten weist die Innenstruktur mindestens einen Hohlraum auf. Der mindestens eine Hohlraum führt zu einer Reduktion des PSI Wertes. Innenstrukturen ohne Hohlräume sind auch denkbar. Aufgrund der Material- und Kosteneinsparungen ist eine Ausführungsform mit Hohlräumen jedoch zu bevorzugen.In a preferred embodiment of both variants, the internal structure has at least one cavity. The at least one cavity leads to a reduction of the PSI value. Interior structures without cavities are also conceivable. However, due to the material and cost savings, an embodiment with cavities is preferable.

Im Folgenden wird die Erfindung anhand von Zeichnungen und konkreten Ausführungsbeispielen näher erläutert, ohne jedoch auf diese beschränkt zu sein.

  • Figur 1 zeigt ein schematisches Profil eines Abstandhalters aus dem Stand der Technik.
  • Figur 2 zeigt ein weiteres schematisches Profil eines Abstandhalters für mehrfachverglaste Fenster.
  • Figur 3 zeigt eine schematische Profilansicht eines Abstandhalters gemäss der vorliegenden Erfindung.
  • Figur 4 zeigt eine schematische Profilansicht einer weiteren Ausführungsform eines Abstandhalters gemäss der vorliegenden Erfindung.
  • Figur 5 zeigt eine schematische Profilansicht eines Abstandhalters gemäss der vorliegenden Erfindung zwischen zwei Glasscheiben.
  • Figur 6 zeigt eine schematische Profilansicht einer weiteren alternativen Form eines Abstandhalters gemäss der vorliegenden Erfindung.
  • Figur 7 zeigt eine schematische Profilansicht einer weiteren alternativen Form eines Abstandhalters gemäss der vorliegenden Erfindung.
  • Figur 8 zeigt eine schematische perspektivische Darstellung eines Abstandhalters teilweise im Querschnitt gemäss der vorliegenden Erfindung.
  • Figur 9 zeigt eine schematische Profilansicht einer weiteren alternativen Form eines Abstandhalters gemäss der vorliegenden Erfinding
  • Figur 10 zeigt eine schematische Profilansicht einer weiteren alternativen Form eines Abstandhalters gemäss der vorliegenden Erfindung
  • Figur 11 zeigt eine schematische Profilansicht einer weiteren alternativen Form eines Abstandhalters gemäss der vorliegenden Erfindung
In the following the invention will be explained in more detail with reference to drawings and specific embodiments, but without being limited to these.
  • FIG. 1 shows a schematic profile of a spacer from the prior art.
  • FIG. 2 shows another schematic profile of a spacer for multi-glazed windows.
  • FIG. 3 shows a schematic profile view of a spacer according to the present invention.
  • FIG. 4 shows a schematic profile view of another embodiment of a spacer according to the present invention.
  • FIG. 5 shows a schematic profile view of a spacer according to the present invention between two glass sheets.
  • FIG. 6 shows a schematic profile view of another alternative form of a spacer according to the present invention.
  • FIG. 7 shows a schematic profile view of another alternative form of a spacer according to the present invention.
  • FIG. 8 shows a schematic perspective view of a spacer partially in cross-section according to the present invention.
  • FIG. 9 shows a schematic profile view of another alternative form of a spacer according to the present invention
  • FIG. 10 shows a schematic profile view of another alternative form of a spacer according to the present invention
  • FIG. 11 shows a schematic profile view of another alternative form of a spacer according to the present invention

Alle Figuren sind nicht massstabgetreu, insbesondere kann die Wandstärke der Aussenhüllen 7 bzw. 12 variabel sein je nach Wahl des Materials. In den Figuren 5 bis 9 wird die Aussenhülle 7 bzw. 12 nunmehr exemplarisch gezeigt.All figures are not true to scale, in particular, the wall thickness of the outer shells 7 and 12 may be variable depending on the choice of material. In the FIGS. 5 to 9 the outer shell 7 or 12 is now shown as an example.

Figur 1 zeigt einen Abstandhalter 1 aus dem Stand der Technik mit einem im Wesentlichen rechteckigen Profilquerschnitt. Auf den beiden schmalen Seiten ist eine primäre Dichtung 3 angebracht. Üblicherweise werden Butylverbindungen als Primärdichtung verwendet. Der Abstandhalter 1 verfügt zudem über eine Dampfsperre 4. Üblicherweise werden Aluminium, Aluminiumlegierungen, Edelstahl oder Kunststofffolien als Dampfsperre 4 verwendet. FIG. 1 shows a spacer 1 of the prior art with a substantially rectangular profile cross-section. On the two narrow sides of a primary seal 3 is attached. Usually, butyl compounds are used as the primary seal. The spacer 1 also has a vapor barrier 4. Usually, aluminum, aluminum alloys, stainless steel or plastic films are used as a vapor barrier 4.

Figur 2 zeigt einen weiteren Abstandhalter 1, der für die Verwendung mit mehrfachverglasten Fenstern mit drei oder mehr Scheiben angepasst ist. Der Abstandhalter 1 verfügt über eine Dampfsperre 4 sowie zwei primäre Dichtung 3 an den jeweiligen schmalen Seiten des Abstandhalters 1. Der Abstandhalter weist zudem eine Nut auf mit einem weiteren Dichtstoff 6, wobei in der Regel Acrylatadhesive oder Hotmelts zur Anwendung kommen. In die Nut ist eine Glasscheibe 5 stoffschlüssig durch die Dichtung 6 mit dem Abstandhalter 1 verbunden. Auf der der dritten Scheibe 5 abgewandten Seite ist der Abstandhalter ausserdem mit einer Spurrille versehen, welche die Position der Nut anzeigt. Die Spurrille dient bei der Isolierglasherstellung der Positionierung des Abstandhalters. In Fig. 2 ist die Spurrille in Zusammenhang mit einem herkömmlich hergestellten Abstandhalter gezeigt. Es versteht sich von selbst, dass solche Spurrillen in Zusammenhang mit den nachstehend beschriebenen coextrudierten oder monoextrudierten Abstandhaltern besonders einfach herstellbar sind. FIG. 2 shows a further spacer 1, which is adapted for use with multi-glazed windows with three or more panes. The spacer 1 has a vapor barrier 4 and two primary seal 3 on the respective narrow sides of the spacer 1. The spacer also has a groove with a further sealant 6, which usually Acrylatadhesive or hot melts are used. In the groove, a glass pane 5 is materially connected by the seal 6 with the spacer 1. On the side facing away from the third disc 5 side of the spacer is also provided with a track groove, which indicates the position of the groove. The track groove is used in the production of insulating glass, the positioning of the spacer. In Fig. 2 the track groove is shown in connection with a conventionally made spacer. It goes without saying that such ruts in Connection with the coextruded or mono-extruded spacers described below are particularly easy to produce.

Figur 3 zeigt einen erfindungsgemässen Abstandhalter 1 mit einer thermoplastischen Ummantelung 7, welche ein Trocknungsmittel 8 umschliesst. Der Abstandhalter 1 weist eine Ummantelung 7 mit einer Dicke von 1 mm auf. Zudem hat der Abstandhalter 1 eine Höhe H von 6.5 mm, einer Höhe h von 3.5 mm einer Breite B von 9.8 mm und einer Breite b von 0.8 mm. Der Abstandhalter 1 weist zudem eine besputterte Fläche 4 auf, die als Dampfsperre den Durchgang von Gas und Wasserdampf verhindert. Die schmalen Seiten des Abstandhalters 1 sind mit einem Acryl Elastomer (VAMAC; Typon) als stark adhäsiver Kleber (Positionierkleber) 3 versehen. Die Ummantelung 7 weist zudem auf einer Seite Perforationen 9 auf, sodass ein Gasaustausch zwischen dem Trocknungsmittel und dem Scheibenzwischenraum (nicht gezeigt) stattfinden kann. FIG. 3 shows a spacer 1 according to the invention with a thermoplastic sheath 7, which encloses a drying agent 8. The spacer 1 has a sheath 7 with a thickness of 1 mm. In addition, the spacer 1 has a height H of 6.5 mm, a height h of 3.5 mm, a width B of 9.8 mm and a width b of 0.8 mm. The spacer 1 also has a sputtered surface 4, which prevents the passage of gas and water vapor as a vapor barrier. The narrow sides of the spacer 1 are provided with an acrylic elastomer (VAMAC; Typon) as a strong adhesive (positioning adhesive) 3. The sheath 7 also has on one side perforations 9, so that a gas exchange between the desiccant and the disc space (not shown) can take place.

Die Ummantelung 7 besteht aus einem flexiblen, von Hand biegbaren thermoplastischen Elastomer. Das Elastomer weist eine Shore A Härte von über 60 ShA auf, ist fogging sicher und diffusionsdicht für Wasserdampf und Argongas. Besonders bevorzugt besteht die Ummantelung 7 aus der Warengruppe Saran und wird zusammen mit der Trockenmittelmatrix coextrudiert.The sheath 7 consists of a flexible, hand-bendable thermoplastic elastomer. The elastomer has a Shore A hardness of over 60 ShA, is fogging safe and diffusion-tight for water vapor and argon gas. Particularly preferably, the sheath 7 from the product group Saran and is coextruded together with the desiccant matrix.

Die Dampfsperre 4 zur Sekundärdichtung besteht vorzugsweise aus einer Verbundfunktionsfolie. Geeignet sind insbesondere diffusionsdicht mit SiO2 besputterte Folien. Besonders bevorzugt ist ein nach der Extrusion aufgeschweisstes Laminat aus PE/PET-SiOx/PET-SiOx, wobei die PE Schicht dem Abstandhalter und die PET-SiOx Schicht dem Glas zuwendbar ist. Alternativ sind Folien auf EVOH Basis denkbar. Alternativ kann auch eine Glas-, Aluminium-, Edelstahl- oder Kunststofffolie nach der Coextrusion der Ummantelung 7 und der Trocknungsmittelmatrix 8 aufgeklebt werden. Die primären Dichtungen (Positionierkleber) 3 können ebenfalls in einem angehängten Fertigungsschritt an den Abstandhalter 1 angebracht werden. Es ist auch denkbar, die Bereitstellung einer geeigneten Dampfsperre im Coextrusionsprozess zu integrieren. Die Dampfsperre 4 kann eine gewalzte Metallfolie sein, die je nach verwendetem Material zwischen 10 und 30 mm (Aluminium) oder 6 und 12 mm (Edelstahl) dick gewählt werden kann. Die gewalzten Folien können auch gewellt ausgeführt werden. Die Wellung erfolgt quer zur Längsrichtung des Abstandhalters. Dadurch ist der Abstandhalter flexibler und kann besser aufgewickelt werden. Selbstverständlich ist in diesem Fall das auf die Folie aufgetragene Kunststoffmaterial entsprechend ebenfalls gewellt.The vapor barrier 4 to the secondary seal preferably consists of a composite functional film. Particularly suitable are diffusion-tight films sputtered with SiO 2 . Particular preference is given to a PE / PET-SiOx / PET-SiOx laminate which has been welded on after the extrusion, wherein the PE layer can be turned towards the spacer and the PET-SiOx layer can be turned towards the glass. Alternatively, films based on EVOH are conceivable. Alternatively, a glass, aluminum, stainless steel or plastic film after the coextrusion of the sheath 7 and the desiccant matrix 8 are glued. The primary seals (positioning adhesive) 3 can also be attached to the spacer 1 in an attached manufacturing step. It is also conceivable to integrate the provision of a suitable vapor barrier in the coextrusion process. The vapor barrier 4 may be a rolled metal foil, which may be chosen between 10 and 30 mm (aluminum) or 6 and 12 mm (stainless steel) thick depending on the material used. The rolled foils can also be made corrugated. The corrugation takes place transversely to the longitudinal direction of the spacer. As a result, the spacer is more flexible and can be wound up better. Of course, in this case, the plastic material applied to the film is also corrugated accordingly.

Figur 4 zeigt eine alternative Ausführungsform zum Abstandhalter 1 aus Figur 3. Der Abstandhalter 1 verfügt über eine thermoplastische Ummantelüng 7 aus Saran™ Barrier Films von DOW, welche eine Trocknungsmittelmatrix 8 (entsprechend der vorstehenden Beschreibung) in zwei gesonderten Kammern einschliesst. Als Trocknungsmittelmatrix kann beispielsweise Infuse 9007 DOW verwendet werden. Die Ummantelung 7 ist an zwei Stellen 9 mit Perforationen 9 versehen, sodass Wasserdampfaustausch zwischen der Trocknungsmittelmatrix und dem Scheibenzwischenraum (nicht gezeigt) ermöglicht wird. Fig.4 zeigt schematisch eine mittlere Scheibe 5 eines dreifachverglasten Fensters, welche in eine Nut eingelassen ist und mittels eines Adhesivklebers 6 stoffschlüssig mit dem Abstandhalter 1 verbunden ist. Der Abstandhalter weist ebenfalls eine Spurrille zur Positionierung gegenüber der mittleren Scheibe auf. Der Abstandhalter 1 weist zudem eine Dampfsperre 4 auf. Die Dampfsperre weist bevorzugt eine mit SiOx beschichtete Folie, z.B. eine PET-SiOx Folie auf. Bevorzugt ist ein Laminat aus PE/PET-SiOX/PET-SiOx des Herstellers AMCOR. Bei der PET-SiOx Schicht handelt es sich um einen PET Träger, der im Hochvakuuum mit Silizium beschichtet wird. Alternativ sind aber auch Dampfsperren aus einer nachträglich angebrachten Edelstahlfolie, Aluminiumwalzfolie oder einer sonstigen Metallfolie oder aufgedampftem Metall denkbar. FIG. 4 shows an alternative embodiment of the spacer 1 from FIG. 3 , The spacer 1 comprises a Dow Saran ™ Barrier Films thermoplastic sheath 7 which encloses a desiccant matrix 8 (as described above) in two separate chambers. For example, Infuse 9007 DOW can be used as the desiccant matrix. The jacket 7 is provided with perforations 9 at two points 9, so that water vapor exchange between the desiccant matrix and the space between the panes (not shown) is made possible. Figure 4 schematically shows a central disc 5 of a triple-glazed window, which is embedded in a groove and is adhesively bonded by means of an Adhesivklebers 6 with the spacer 1. The spacer also has a track groove for positioning relative to the center disc. The spacer 1 also has a vapor barrier 4. The vapor barrier preferably has a film coated with SiOx, for example a PET-SiOx film. A laminate of PE / PET-SiOX / PET-SiOx from the manufacturer AMCOR is preferred. The PET-SiOx layer is a PET carrier that is in a high vacuum is coated with silicon. Alternatively, however, vapor barriers from a subsequently attached stainless steel foil, aluminum roller foil or other metal foil or vapor-deposited metal are conceivable.

Der Abstandhalter weist ausserdem zwei primäre Dichtungen 3 aus einem Acrylatklebstoff auf, welche ebenfalls nachträglich angebracht wurden. Alternativ wäre auch TPU-Foam, Butyl, Hotmelt oder EPDM gut geeignet.The spacer also has two primary seals 3 made of an acrylate adhesive, which were also attached later. Alternatively, TPU foam, butyl, hotmelt or EPDM would also be well suited.

Als Trocknungsmittelmatrix wurde für Figur 3 und 4 3A Zeolith mit einem volumetrischen Anteil von 25 bis 60% in einer Matrix eines Olefin Block Coplymers (z.B. INFUSE™ 9700 von DOW®) oder ein Polyolefin Elastomer (z.B. ENGAGE™ von DOW®)verwendet.As desiccant matrix was used for FIG. 3 and 4 3A zeolite having a volumetric fraction of 25 to 60% in a matrix of an olefin block copolymer (eg INFUSE ™ 9700 from DOW®) or a polyolefin elastomer (eg ENGAGE ™ from DOW®).

Die thermoplastische Ummantelung 7 und die Trocknungsmittelmatrix 8 werden in einem Verfahrensschritt coextrudiert. Alternativ kann auch die Dichtung 6 mit der Trocknungsmittelmatrix 8 und der thermoplastischen Ummantelung 7 coextrudiert werden.The thermoplastic sheath 7 and the desiccant matrix 8 are coextruded in one process step. Alternatively, the seal 6 can be coextruded with the desiccant matrix 8 and the thermoplastic jacket 7.

Figur 5 zeigt einen zwischen zwei Scheiben 5 montierten Abstandhalter 1. Der Abstandhalter 1 weist eine thermoplastische Ummantelung 7 im Verbund mit einem Trocknungsmittel 8 auf. Die thermoplastische Ummantelung besteht aus TPU oder Olefinen. Der Abstandhalter weist zudem beidseitig ein Adhesivband 11 auf, welches vorgängig mit einer Folie beschichtet war und wobei die Folie vor der Aufbringung des Abstandhalters 1 auf die Glasscheiben 5 abgelöst wurde. Der Abstandhalter 1 weist zudem Primärsperren 3 aus Butylklebstoff auf. Eine sekundäre Dichtung 10 aus Polysulfid - Thiover oder Polyurethan - Polyver dichtet zusätzlich den Abstandhalter 1 von der Aussenatmosphäre ab. Das Trocknungsmittel 8 wird als Matrix aus Trocknungsmittel und einem Kunststoff extrudiert, wobei die Materialen der Figuren 3 und 4 verwendet werden. FIG. 5 shows a spacer 1 mounted between two panes 5. The spacer 1 has a thermoplastic jacket 7 in combination with a drying agent 8. The thermoplastic sheath consists of TPU or olefins. The spacer also has on both sides an adhesive tape 11, which was previously coated with a film and wherein the film was detached before the application of the spacer 1 on the glass sheets 5. The spacer 1 also has primary locks 3 made of butyl adhesive. A secondary seal 10 of polysulfide-thiover or polyurethane-polyver additionally seals the spacer 1 from the outside atmosphere. The desiccant 8 is used as a matrix of desiccant and a Plastic extruded, the materials of the Figures 3 and 4 be used.

Figur 6 zeigt einen Abstandhalter 1, bei dem im Unterschied zur Figur 5 das Adhesivband und die Primärsperre durch eine Primärsperre 3 aus Adhesiv Hotmelt oder Butyl(adhesiv) ersetzt wurde. Die Primärsperre 3 führt somit eine Doppelfunktion aus: stoffschlüssiges Verbinden der Glassscheiben und Verhinderung der Dampfdiffusion. Die Primärsperre 3 kann mit den übrigen Bestandteilen des Abstandhalters coextrudiert werden. Zur Applikation des Adhesivbandes ist in Figur 6 (nicht im Detail dargestellt) ähnlich wie in den Figuren 2 oder 3 eine Absetzung bzw. eine Nut vorgesehen (welche in diesen Figuren ebenfalls bereits zur Aufnahme der primären Dichtungen 3 verwendet wird. Je nachdem ob eine Ausführung mit einer Barrierfolie (vergleichbar mit den Darstellungen in Figuren 3 und 4) oder eine gewalzte Edelstahlfolie verwendet wird, ist zur Aufnahme des Adhesivbands eine Absetzung (bei einer Barrierfolie) oder eine Nut (zwischen der Edelstahfolie und dem Profil) vorgesehen. FIG. 6 shows a spacer 1, in which, unlike FIG. 5 the adhesive tape and the primary barrier have been replaced by a primary barrier 3 made of Adhesiv Hotmelt or butyl (adhesive). The primary barrier 3 thus performs a dual function: cohesive bonding of the glass panes and prevention of vapor diffusion. The primary barrier 3 can be coextruded with the remaining components of the spacer. For application of the adhesive tape is in FIG. 6 (not shown in detail) similar as in the Figures 2 or 3 a deposition or a groove provided (which is also already used in these figures for receiving the primary seals 3. Depending on whether a design with a barrier film (comparable to the illustrations in Figures 3 and 4 ) or a rolled stainless steel foil is used to accommodate the Adhesivbands a deposition (in a barrier film) or a groove (between the stainless steel foil and the profile).

Die Figur 7 unterscheidet sich von der Figur 5 durch eine mit dem thermoplastischen Elastomer 7 verschweisste Dampfsperre 4 aus einer SiOx beschichteten Folie oder aus einer verklebten Folie aus Aluminium oder Edelstahl. Das thermoplastische Elastomer 7 umschliesst ein Trocknungsmittel 8.The FIG. 7 is different from the FIG. 5 by a welded to the thermoplastic elastomer 7 vapor barrier 4 made of a SiO x coated film or a bonded film of aluminum or stainless steel. The thermoplastic elastomer 7 encloses a drying agent 8.

Es versteht sich von selbst, dass alle oben genannten erfindungsgemässen Ausführungsformen beliebig miteinander kombiniert sein können.It goes without saying that all of the abovementioned embodiments according to the invention can be combined with one another as desired.

Figur 8 zeigt perspektivisch einen Querschnitt eines Abschnitts eines Abstandhalters 1 der als Bandausschnitt vorliegt. Der Abstandhalter 1 weist eine erste ebene Grundfläche 20 auf, welche bei der Montage auf einen Scheibenzwischenraum zeigt (nicht gezeigt) und eine zweite ebene Grundfläche 21, welche bei der Montage gegen einen Fensterrahmen zeigt (nicht gezeigt) auf. Der Abstandhalter 1 verfügt auf der ganzen Länge der Seite 20 über Perforationen 9, um einen Gasaustausch mit dem Trocknungsmittel zu ermöglichen. Die Grundfläche 21 wird durch eine diffusionsdichte Folie begrenzt. FIG. 8 shows in perspective a cross section of a portion of a spacer 1 which is present as a band cutout. The spacer 1 has a first planar base surface 20, which when mounted on a space between the panes (not shown) and a second flat base 21 which faces a window frame during assembly (not shown). The spacer 1 has perforations 9 along the entire length of the side 20 to allow gas exchange with the desiccant. The base 21 is limited by a diffusion-tight film.

Figur 9 zeigt perspektivisch einen Querschnitt eines Abstandhalters 1, der als Bandausschnitt vorliegt. Der Abstandhalter 1 weist eine Aussenhülle 12 und eine poröse Innenstruktur 13 auf. Die Aussenhülle 12 und die Innenstruktur 13 werden als Komponentenverbindung aus einer Kunststoffmatrix und Trocknungsmittel monoextrudiert. Das bevorzugt verwendete Trocknungsmittel ist Zeolith und macht bevorzugt 50% der Trocknungsmittelmatrix aus. Der Kunststoff für die Matrix ist Infuse 9007 von Dow. Alternativ kann z.B. auch HTC8312/59 von KRAIBURG TPE Gmbh & Co. KG verwendet werden. Auch diese Ausführungsform kann für Dreifachverglasungen verwendet werden und dazu mit einer Spurrille wie vorstehend beschreiben versehen werden. Ebenso kann diese Ausführungsform wie vorstehend beschrieben mit Adhesivtape und Dampfsperren, insbesondere einer Dampfsperre aus einer PE/PET-SiOx/PET-SiOx Laminatfolie versehen sein. FIG. 9 shows in perspective a cross section of a spacer 1, which is present as a band cutout. The spacer 1 has an outer shell 12 and a porous inner structure 13. The outer shell 12 and the inner structure 13 are mono-extruded as a component compound of a plastic matrix and desiccant. The desiccant preferably used is zeolite and preferably constitutes 50% of the desiccant matrix. The plastic for the matrix is Infuse 9007 from Dow. Alternatively, eg HTC8312 / 59 can also be used by KRAIBURG TPE GmbH & Co. KG. This embodiment can also be used for triple glazing and provided with a track groove as described above. Likewise, this embodiment may be provided as described above with adhesive tape and vapor barriers, in particular a vapor barrier made of a PE / PET-SiOx / PET-SiOx laminate film.

Die Extrusion erfolgt bei einer Temperatur von 130°C (bei der Extrusionsdüse) bis 160°C (im Vorlauf) und einer Extrusionsgeschwindigkeit von 5 bis 30 m/min.The extrusion takes place at a temperature of 130 ° C (in the extrusion die) to 160 ° C (in the forerun) and an extrusion speed of 5 to 30 m / min.

Figur 10 zeigt perspektivisch einen Querschnitt eines Abstandhalters 1. Dabei weist das Trocknungsmittel 8 zwei Hohlräume 14 auf. Das Trocknungsmittel ist von einer Ummantelung 7 umgeben. Das Trocknungsmittel 8 mit den Hohlräumen 14 wird mit der Ummantelung 7 coextrudiert. FIG. 10 shows in perspective a cross section of a spacer 1. In this case, the drying means 8 has two cavities 14. The drying agent is surrounded by a jacket 7. The desiccant 8 with the cavities 14 is coextruded with the jacket 7.

Figur 11 unterscheidet sich von Figur 10 dadurch, dass der Abstandhalter 1 als ganzes aus einer Kunststoffmatrix monoextrudiert wird. Dabei weist der Abstandhalter 1 eine Aussenhülle 12 und eine Innenstruktur 13 auf. Die Innenstruktur zeigt zudem zwei Hohlräume 14. FIG. 11 differs from FIG. 10 in that the spacer 1 as a whole is mono-extruded from a plastic matrix. In this case, the spacer 1 has an outer shell 12 and an inner structure 13. The inner structure also shows two cavities 14.

In Figur 10 und in Figur 11 wird durch die Hohlräume 14 zum einen der PSI Wert reduziert, zum anderen werden Materialeinsparungen erreicht. Es versteht sich, dass auch diese Ausführungsformen für Dreifachverglasungen verwendet werden und dazu mit einer Spurrille wie vorstehend beschreiben versehen werden können. Ebenso können diese Ausführungsformen wie vorstehend beschrieben mit Adhesivtape und Dampfsperren, insbesondere einer Dampfsperre aus einer PE/PET-SiOx/PET-SiOx Laminatfolie versehen sein.In FIG. 10 and in FIG. 11 is reduced by the cavities 14 on the one hand, the PSI value, on the other hand material savings can be achieved. It is understood that these embodiments are also used for triple glazing and can be provided with a track groove as described above. Likewise, these embodiments may be provided as described above with adhesive tape and vapor barriers, in particular a vapor barrier made of a PE / PET-SiOx / PET-SiOx laminate film.

Für alle genannten Ausführungsformen ist es im Herstellungsverfahren möglich, die Extrusion mit Wasser zu kühlen.For all the embodiments mentioned, it is possible in the production process to cool the extrusion with water.

Somit ist eine hohe Extrusionsgeschwindigkeit möglich und gleichzeitig wird das Trocknungsmittel im Extrudierprozess weniger belastet. Die so hergestellten Abstandhalter verfügen über eine längere Lagerbarkeit.Thus, a high extrusion speed is possible and at the same time the drying agent is less stressed in the extrusion process. The spacers thus produced have a longer shelf life.

Durch die Wahl eines thermoplastischen Elastomers in den Figuren 3-8 und 10 verfügt die Abstandhalteraussenhaut zudem über eine geringere Wasserdampfdurchlässigkeit. Dies erhöht die Lebensdauer von mehrfachverglasten Fenstern mit den erfindungsgemässen Abstandhaltern massgebend.By choosing a thermoplastic elastomer in the Figures 3-8 and 10 the spacer outer skin also has a lower water vapor permeability. This significantly increases the service life of multi-glazed windows with the spacers according to the invention.

In der Figur 9 und 11 wird die Lebensdauer mit einer Aussenhülle mit geringerer Wasserdampfdurchlässigkeit, welche durch monoextrusion entsteht ebenfalls erhöht.In the FIG. 9 and 11 The life is increased with an outer shell with lower water vapor permeability, which results from monoextrusion also.

Claims (5)

  1. Spacer (1) for spacing apart glass panes (5) of a multi-glazed window, wherein the spacer (1) has a substantially rectangular cross section and is provided with a first, substantially planar base area (20) and a second, substantially planar opposing base area (21) and wherein the first base area (20) is substantially permeable to water vapour and the second base area (21) is substantially impermeable to gases, in particular to water vapour and inert gases, in particular argon and krypton, wherein the second base area (21) comprises at least one vapour barrier (4) to prevent water vapour diffusion through the vapour barrier (4), characterised by that the vapour barrier (4) is formed by a film of a PE layer and at least one PET-SiOx layer constructed as a laminate.
  2. Spacer (1) according to claim 1, wherein the vapour barrier (4) is applied directly in the extrusion process or directly following the extrusion pro-cess.
  3. Spacer (1) according to claim 1 or 2, wherein the vapour barrier (4) is applied by co-extrusion.
  4. Spacer (1) according to any one of claims 1 - 3, wherein the vapour barrier (4) is a laminate of PE/PET-SiOx/PET-SiOx.
  5. Spacer (1) according to any one of the preceding claims, wherein the PET-SiOx film is a film coated with SiOx.
EP15191282.1A 2011-04-13 2012-04-10 Spacer for spacing glass sheets of a multiple glazed window Active EP3023569B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15191282.1A EP3023569B1 (en) 2011-04-13 2012-04-10 Spacer for spacing glass sheets of a multiple glazed window
PL15191282T PL3023569T3 (en) 2011-04-13 2012-04-10 Spacer for spacing glass sheets of a multiple glazed window

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP11162316 2011-04-13
EP11196113 2011-12-29
EP12714669.4A EP2697466A1 (en) 2011-04-13 2012-04-10 Spacer for spacing apart glass panes in a multi-glazed window, a multi-glazed window and a process for producing a spacer
EP15191282.1A EP3023569B1 (en) 2011-04-13 2012-04-10 Spacer for spacing glass sheets of a multiple glazed window

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP12714669.4A Division EP2697466A1 (en) 2011-04-13 2012-04-10 Spacer for spacing apart glass panes in a multi-glazed window, a multi-glazed window and a process for producing a spacer

Publications (2)

Publication Number Publication Date
EP3023569A1 EP3023569A1 (en) 2016-05-25
EP3023569B1 true EP3023569B1 (en) 2018-06-06

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EP15200838.9A Active EP3020908B1 (en) 2011-04-13 2012-04-10 Spacer for spacing glass sheets of a multiple glazed window
EP15191282.1A Active EP3023569B1 (en) 2011-04-13 2012-04-10 Spacer for spacing glass sheets of a multiple glazed window
EP12714669.4A Withdrawn EP2697466A1 (en) 2011-04-13 2012-04-10 Spacer for spacing apart glass panes in a multi-glazed window, a multi-glazed window and a process for producing a spacer

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EP12714669.4A Withdrawn EP2697466A1 (en) 2011-04-13 2012-04-10 Spacer for spacing apart glass panes in a multi-glazed window, a multi-glazed window and a process for producing a spacer

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PL (2) PL3020908T3 (en)
WO (1) WO2012140005A1 (en)

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PL3020908T3 (en) 2011-04-13 2018-11-30 Alu-Pro Srl Spacer for spacing glass sheets of a multiple glazed window
PL2802726T3 (en) 2012-01-13 2016-10-31 Spacer for insulating glazing
EP3049603B1 (en) 2013-09-25 2020-12-16 ALU-PRO srl Spacer for spacing glass panes of a multi-glazed window, multi-glazed window, vapour barrier film for a spacer, method for producing a vapour barrier film, and method for producing a spacer
CN105793510A (en) 2013-12-12 2016-07-20 法国圣戈班玻璃厂 Double glazing having improved sealing
CN105793511A (en) 2013-12-12 2016-07-20 法国圣戈班玻璃厂 Spacer for insulating glazing units, comprising extruded profiled seal
WO2015197491A1 (en) 2014-06-27 2015-12-30 Saint-Gobain Glass France Insulated glazing comprising a spacer, and production method
WO2015197488A1 (en) 2014-06-27 2015-12-30 Saint-Gobain Glass France Insulated glazing comprising a spacer, method for the production thereof, and use thereof as glazing in buildings
PL3265636T3 (en) 2015-03-02 2022-07-04 Saint-Gobain Glass France Glass fibre reinforced spacer for insulating glazing, method for manufacturing the same and use of such a spacer in multiple glazing
WO2016170079A1 (en) 2015-04-22 2016-10-27 Saint-Gobain Glass France Method and device for producing a triple insulated glazing
USD777345S1 (en) 2015-05-21 2017-01-24 Saint-Gobain Glass France Spacer bar
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WO2018049176A1 (en) * 2016-09-09 2018-03-15 Andersen Corporation High surface energy window spacer assemblies
US20200324451A1 (en) 2016-09-14 2020-10-15 Saint-Gobain Glass France Spacer for insulating glazing units, method for producing the spacer and multiple insulating glazing unit
PL3477035T3 (en) 2017-10-30 2020-12-28 Technoform Glass Insulation Holding Gmbh Spacer for photovoltaic applications
EP3505716A1 (en) 2018-01-02 2019-07-03 Amcor Flexibles Denmark ApS Barrier window spacer with enhanced durability
KR20210039463A (en) 2018-09-13 2021-04-09 쌩-고벵 글래스 프랑스 Spacer with metal side parts
DE202020005504U1 (en) 2019-03-29 2021-06-28 Saint-Gobain Glass France Hollow profile spacers with pre-applied sealing compound
WO2020200622A1 (en) 2019-03-29 2020-10-08 Saint-Gobain Glass France Method for producing an insulating glass unit
EP3770369A1 (en) 2019-07-23 2021-01-27 Saint-Gobain Glass France Bearing device for hollow profile spacers

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Also Published As

Publication number Publication date
PL3023569T3 (en) 2018-11-30
EP3020908A1 (en) 2016-05-18
PL3020908T3 (en) 2018-11-30
WO2012140005A1 (en) 2012-10-18
EP3020908B1 (en) 2018-06-06
EP2697466A1 (en) 2014-02-19
EP3023569A1 (en) 2016-05-25

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