In order to provide a spacer profile for an insulated glazing unit, which profile has a cross-section based on a rectangular shape, is provided with two parallel spaced side walls which, when said insulated glazing unit is assembled, will be placed against the panes of glass to be kept apart from ea
In order to provide a spacer profile for an insulated glazing unit, which profile has a cross-section based on a rectangular shape, is provided with two parallel spaced side walls which, when said insulated glazing unit is assembled, will be placed against the panes of glass to be kept apart from each other, and is further provided with first and second transverse walls which extend between said side walls and of which the first will be adjacent to the edge of the glazing unit and the second will face the space between the panes, with the intention of enabling simple handling of said profile when assembling the spacer frame whilst maintaining a high absorptive capacity for water vapor, it is proposed that said spacer profile comprises a binder matrix and, embedded therein, a particulate adsorbent material for water vapor, and that the binder matrix is permeable to water vapor.
대표청구항▼
The invention claimed is: 1. A spacer profile for an insulated glazing unit, which profile has a cross-section based on a rectangular shape, is provided with two parallel spaced side walls which, when said insulated glazing unit is assembled, will be placed against the panes of glass to be kept apa
The invention claimed is: 1. A spacer profile for an insulated glazing unit, which profile has a cross-section based on a rectangular shape, is provided with two parallel spaced side walls which, when said insulated glazing unit is assembled, will be placed against the panes of glass to be kept apart from each other, and is further provided with first and second transverse walls which extend between said side walls and of which the first will be adjacent to the edge of the glazing unit and the second will face the space between the panes, the spacer profile having a plurality of ducts extending in the longitudinal direction and distributed over the cross-section of the spacer profile, wherein said spacer profile comprises a binder matrix and, embedded therein, a particulate adsorbent material for water vapor, and the binder matrix is permeable to water vapor, the spacer profile further comprising one or more hollow chambers extending in the longitudinal direction, the plurality of ducts being smaller in volume than the at least one hollow chamber. 2. A spacer profile as defined in claim 1, wherein said particulate adsorbent material is selected from the group consisting of silica gels and aluminosilicates. 3. A spacer profile as defined in claim 1, wherein said particulate adsorbent material has a microporous structure with pore sizes ranging from 2 to 25 angstrom units and preferably from 2 to 10 angstrom units. 4. A spacer profile as defined in claim 1, wherein said particulate adsorbent material is embedded in the matrix in powdered form. 5. A spacer profile as defined in claim 1, wherein said particulate adsorbent material comprises particles having a particle size of up to 6 mm. 6. A spacer profile as defined in claim 5, wherein said particulate adsorbent material comprises particles having an average particle size in the range of 0.1 to 5 mm. 7. A spacer profile as defined in claim 1, wherein the proportion of said particulate adsorbent material in the total mass of said spacer profile is from 15 to 85 wt % and preferably from 30 to 65 wt %. 8. A spacer profile as defined in claim 7, wherein the proportion of said adsorbent material in the total mass of said spacer profile is 40 wt % or more and preferably 50 wt % or more. 9. A spacer profile as defined in claim 1, wherein the content of said adsorbent material in the side walls is less than in the regions of said first and second transverse walls. 10. A spacer profile as defined in claim 1, wherein said spacer profile is an extrudate. 11. A spacer profile as defined in claim 10, wherein said binder matrix is selected from the group consisting of organic binding agents, inorganic binding agents, water-soluble methyl cellulose, thermoplastic materials, polyamide, polypropylene, and polysilicon compounds. 12. A spacer profile as defined in claim 1, wherein embedded in the binder matrix is a material selected from the group consisting of fillers, reinforcing agents, pigments, and UV stabilizers. 13. A spacer profile as defined in claim 12, wherein said fillers, reinforcing agents, and pigments are selected from the group consisting of nanoparticles, liquid crystal polymers, glass fibers, carbon fibers, aramide fibers, natural fibers in the form of at least one of short, long, and continuous fibers, metal fibers in the form of at least one of short, long, and continuous fibers, mica, titanium(IV) oxide, wollastonite and hollow spheres of glass. 14. A spacer profile as defined in claim 1, wherein the binder matrix is expanded. 15. A spacer profile as defined in claim 14, wherein said expanded binder matrix has an open-pore expanded structure. 16. A spacer profile as defined in claim 1, wherein said spacer comprises a vapor barrier layer and optionally an inert gas barrier layer adjacent to said first transverse wall. 17. A spacer profile as defined in claim 16, wherein said vapor barrier layer and optionally said inert gas barrier layer extend to the side walls bearing against the insulated glazing unit. 18. A spacer profile as defined in claim 16, wherein said vapor barrier layer and optionally said inert gas barrier layer are embedded in the profiled element. 19. A spacer profile as defined in claim 1, wherein said spacer profile comprises reinforcing elements for stiffening the same, the reinforcing elements selected from the group consisting of tapes, wires, angle sections, nets, films, or fibrous bundles of metal and composite fiber-plastics materials. 20. A spacer profile as defined in claim 1, wherein said hollow chamber(s) have passages in said second transverse wall at regular intervals. 21. A spacer profile as defined in claim 1, wherein said spacer contains one or more voluminous chambers surrounded by hollow chamber walls and also comprises a plurality of small volume ducts distributed within the hollow chamber walls. 22. A spacer profile as defined in claim 1, wherein said spacer is completely or partially encased by a plastics material or a metallic material. 23. A spacer profile as defined in claim 1, wherein additional bulk desiccant is present in the hollow chambers of said spacer profile. 24. A spacer profile as defined in claim 1, wherein the binder matrix is selected from materials having coefficients of permeation for water vapor that are less than or equal to 500 g��μm/m2��d. 25. A spacer profile as defined in claim 24, wherein said binder matrix consists predominantly of polypropylene and that the content of adsorbent material is from 15 to 40 wt %, based on the weight of said spacer profile. 26. A spacer profile as defined in claim 1, wherein at least one surface has been processed such that particles of adsorbent material present in the binder matrix are at least partially exposed at the surface of said spacer profile. 27. A spacer profile frame for insulated glazing units, produced from frame parts made of spacer profile as defined in claim 1. 28. A spacer profile frame as defined in claim 27, wherein said frame parts, when necessary, are cut to length from endless profiled material and are joined to each other at the frame corners by means of welding or adhesion. 29. A spacer profile frame as defined in claim 28, wherein said frame parts are joined at the frame corners by means of corner joiners. 30. A spacer profile frame as defined in claim 27, wherein said corner joiners are connected to the frame parts by an adhesive bond, by a form-fit and/or by a friction lock. 31. A spacer profile frame as defined in claim 27, wherein the corner regions of said frame are produced by means of bending, the areas to be bent being heated before the bending operation and optionally also during the bending operation, particularly by means of the application of radiant heat, contact heat, hot air, induction heat or resistance heat. 32. A spacer profile frame as defined in claims 27, wherein the outer surface of the frame-forming spacer profile has guide elements for the accommodation of corner and straight joiners. 33. A spacer profile frame as defined in claim 27, wherein said corner joiners are made of substantially the same material as the spacer profile itself by injection molding, transfer molding, compression molding, or plunger molding. 34. A process for the production of a spacer profile as defined in claim 1, characterized by a shaping step, in which a composition comprising a binding agent that is permeable to water vapor, a particulate adsorbent material for water vapor in an amount of from 15 to 40 wt %, based on the weight of said binding agent and adsorbent material, is shaped to a profile in a shaping machine. 35. A process for the production of a spacer profile as defined in claim 34, wherein said composition contains a processing agent, particularly a wax, which is completely or partially expelled in a subsequent step. 36. A process for the production of a spacer profile as defined in claim35, wherein said wax is a polyethylene wax. 37. A process for the production of a spacer profile as defined in claim 35, wherein the proportion of said processing agent in the total composition used for shaping said spacer profile is up to 35 wt %. 38. A process as defined in claim 34, wherein said composition is premixed or compounded before it enters said shaping machine. 39. A process as defined in claims 34, wherein the shaping step is realized by an extrusion, injection molding, transfer molding, compression molding, pultrusion, or plunger molding process. 40. A process as defined in claim 34, wherein following shaping of the spacer profile the binding agent is crosslinked, optionally accompanied by expulsion of the processing agent used and optionally combined with drying of said spacer profile. 41. A process as defined in claim 34, wherein at least one surface of the profile is processed in order to at least partially expose particles of adsorbent material in the binder matrix which are present at the surface of the profile. 42. A spacer profile as defined in claim 1, wherein said spacer profile is a pultrudate.
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