# US 9,752,376 B2 · Insulating glazing unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,376 B2 - Document ID: US9752376B2 - Status: Granted - Kind: B2 - Application number: 14/435,067 - Filed: 2013-10-10 - Published: 2015-10-08 - Granted: 2017-09-05 - Earliest claimed: 2012-10-12 - Assignees: Amcor Flexibles Kreuzlingen Ltd. - Applicants: Amcor Flexibles Kreuzlingen Ltd. - Inventors: Wolfgang Lohwasser - Web page: https://patentgrep.com/patent/US9752376B2 ## CPC - E06B 3/66352: {with separate sealing strips between the panes and the spacer} - B32B 27/08: of synthetic resin - B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers} - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 27/36: comprising polyesters - B32B 37/12: characterised by using adhesives - E06B 3/6621: {with special provisions for fitting in window frames or to adjacent units; Separate edge protecting strips (E06B3/66347 takes precedence)} - B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer - B32B 2255/20: Inorganic coating - B32B 2307/514: Oriented - B32B 2307/7242: Non-permeable - E06B 3/66: Units comprising two or more parallel glass or like panes permanently secured together {(reforming and uniting glass sheets by fusing C03B23/00; joining glass to glass or to other materials C03C27/00; laminated glass B32B17/10)} - E06B 3/67321: {Covering spacer elements, e.g. with sealants} - E06B 3/677: Evacuating or filling the gap between the panes {; Equilibration of inside and outside pressure}; Preventing condensation in the gap between the panes (by means of spacing elements E06B3/663); Cleaning the gap between the panes - E06B 2003/6638: {with coatings} - Y02B 80/22: Glazing, e.g. vaccum glazing - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract Insulating glazing unit containing at least one spacer for the spacing of glass panes received in a frame, wherein a barrier film is applied to the spacer, at least on the side directed towards the frame. The barrier film is a composite film, which, on the side directed towards the spacer, has an adhesive or sealing layer as the internal layer and, on the side directed towards the frame, a barrier layer containing oriented EVOH and a thin adhesive layer of metal or metal oxide located on the outside and directed towards the frame. ## Claims ### Claim 1 An insulating glazing unit comprising panes received in a frame, the panes being held apart by a spacer, wherein a barrier film is at least partially applied to the spacer on the side directed towards the frame, wherein the barrier film is a composite film, which has an adhesive or sealing layer as the internal layer on the side directed towards the spacer, wherein the composite film, on the side directed towards the frame, has a barrier layer containing oriented EVOH and a thin adhesive layer of metal or metal oxide located on the outside and directed towards the frame. ### Claim 2 (depends on 1) An insulating glazing unit according to claim 1, wherein the EVOH layer of the barrier layer of the composite film is stretched in such a way that the spacer, to which the composite film is applied, has an OXTR value of 0.5 cm3/m2/24 h/bar or less. ### Claim 3 (depends on 1) An insulating glazing unit according to claim 1, wherein the barrier film is at least partially applied to the sides of the spacer directed toward the glass panes. ### Claim 4 (depends on 1) An insulating glazing unit according to claim 1, wherein the layer thickness of the layer of oriented EVOH is between 8 and 30 μm. ### Claim 5 (depends on 1) An insulating glazing unit according to claim 1, wherein the internal layer of the barrier film consists of PE or of a coextruded oriented polypropylene-PE layer. ### Claim 6 (depends on 1) An insulating glazing unit according to claim 1, wherein the thin adhesive layer consists of SiOx or AlOy, wherein x is greater than 0.9 and less than 2, and y is greater than 0.8 and less than 1.5. ### Claim 7 (depends on 6) An insulating glazing unit according to claim 6, wherein the thin adhesive layer has a layer thickness of at least 0.2 nm, but less than 1 μm. ### Claim 8 (depends on 1) An insulating glazing unit according to claim 1, wherein the barrier layer of the barrier film has a PET layer and a layer of oriented EVOH, wherein the thin adhesive layer of metal or metal oxide is applied to the PET layer. ### Claim 9 (depends on 8) An insulating glazing unit according to claim 8, wherein the PET layer has a thickness of 12 to 50 μm. ### Claim 10 (depends on 8) An insulating glazing unit according to claim 8, wherein the barrier layer of the barrier film has a further thin layer of metal oxide between the layer of oriented EVOH and the PET layer. ### Claim 11 (depends on 10) An insulated glazing unit according to claim 10, wherein the further thin layer consists of SiOx or AlOy, wherein x is greater than 0.9 and less than 2, and y is greater than 0.8 and less than 1.5. ### Claim 12 (depends on 11) An insulating glazing unit according to claim 11, wherein the further thin layer has a layer thickness of at least 10 nm, but less than 1 μm. ### Claim 13 (depends on 1) An insulating glazing unit according to claim 1, wherein the application of the barrier film to the spacer is welding by sealing the internal layer of the barrier film to the external face of the spacer. ### Claim 14 (depends on 13) An insulating glazing unit according to claim 13, wherein at least an outermost layer of the spacer and the internal layer of the barrier film substantially consist of the same polymer. ### Claim 15 (depends on 1) An insulating glazing unit according to claim 1, wherein the space located between the glass panes and the exposed surface of the spacer contains a gas filling of argon. ### Claim 16 (depends on 1) An insulating glazing unit according to claim 1, wherein the spacer has an internal structure containing a drying agent and a silicone-free external cover surrounding the internal structure. ### Claim 17 (depends on 1) A method for producing a barrier film for an insulating glazing unit according to claim 1, comprising producing the composite film as a barrier film, which, on the one side, has an outer adhesive or sealing layer as the internal layer and a barrier layer laminated thereon containing oriented EVOH and, on the other outer side of the composite film, a thin adhesive layer of metal or metal oxide. ### Claim 18 (depends on 1) An insulating glazing unit according to claim 1, wherein the layer thickness of the layer of oriented EVOH is between 10 and 15 μm. ### Claim 19 (depends on 6) An insulating glazing unit according to claim 6, wherein the thin adhesive layer has a layer thickness of at least 0.2 nm, but less than 0.1 μm. ### Claim 20 (depends on 11) An insulating glazing unit according to claim 11, wherein the further thin layer has a layer thickness of at least 10 nm, but less than 0.1 μm.