# US 2025/0083418 A1 · Laminated glazing having a functional film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0083418 A1 - Document ID: US20250083418A1 - Status: Published application - Kind: A1 - Application number: 18/580,520 - Filed: 2022-07-18 - Published: 2025-03-13 - Earliest claimed: 2021-07-19 - Assignees: Saint-Gobain Glass France - Applicants: Saint-Gobain Glass France - Inventors: Laurent MAILLAUD; Michael LABROT - Web page: https://patentgrep.com/patent/US20250083418A1 ## CPC - B32B 17/10504: {Liquid crystal layer} - B32B 1/00: Layered products having a non-planar shape - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 17/10036: {comprising two outer glass sheets} - B32B 17/10174: {Coatings of a metallic or dielectric material on a constituent layer of glass or polymer} - B32B 17/10449: {Wavelength selective transmission} - B32B 17/10761: {containing vinyl acetal} - B32B 17/10788: {containing ethylene vinylacetate} - B32B 17/10798: {containing silicone} - B32B 17/10889: {shaping the sheets, e.g. by using a mould (B32B17/10816 takes precedence)} - G02F 1/133331: {Cover glasses} - B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA - B32B 2307/414: Translucent - B32B 2307/416: Reflective - B32B 2307/536: Hardness - B32B 2307/546: Flexural strength; Flexion stiffness - B32B 2317/18: Cellulose, modified cellulose or cellulose derivatives, e.g. viscose (B32B2317/10, B32B2317/12, B32B2317/16 take precedence) - B32B 2383/00: Polysiloxanes - B32B 2605/00: Vehicles - G02F 2202/28: Adhesive materials or arrangements - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract Provided is a laminated glazed unit having at least one first glass substrate and a second glass substrate, at least one functional film arranged between the two glass substrates, at least one first lamination interlayer film between the first glass substrate and the functional film, and at least one second lamination interlayer film between the second glass substrate and the functional film. The functional film has at least one layer of a transparent adhesive material, referred to as OCA, which is viscoelastic so as to be deformable in its thickness during the process for laminating the glazed unit. ## Claims ### Claim at position 1 1: A laminated glazed unit, comprising at least one first glass substrate and a second glass substrate, at least one functional film arranged between the first and second glass substrates, at least one first lamination interlayer film between the first glass substrate and the functional film, and at least one second lamination interlayer film between the second glass substrate and the functional film, wherein the functional film comprises at least one layer of a transparent adhesive material OCA, which is viscoelastic so as to be deformable in its thickness during a process for laminating the glazed unit. ### Claim at position 2 (depends on 1) 2: The laminated glazed unit of claim 1, wherein the at least one OCA layer has a hardness of between 10 and 50 Shore000. ### Claim at position 3 (depends on 1) 3: The laminated glazed unit of claim 1, wherein the at least one OCA layer has a thickness of greater than 0.5 mm. ### Claim at position 4 (depends on 1) 4: The laminated glazed unit according to claim 1, wherein the functional film comprises a first flexible transparent substrate, a first OCA layer, and a second flexible transparent substrate, and the first flexible transparent substrate and/or the second flexible transparent substrate have a technical function. ### Claim at position 5 (depends on 1) 5: The laminated glazed unit according to claim 1, wherein the functional film comprises a first flexible transparent substrate, a first OCA layer, a second flexible transparent substrate having a technical function, a second OCA layer, and a third flexible transparent substrate. ### Claim at position 6 (depends on 4) 6: The laminated glazed unit according to claim 4, wherein the second flexible transparent substrate having a technical function is a liquid crystal cell. ### Claim at position 7 (depends on 6) 7: The laminated glazed unit according to claim 6, wherein the liquid crystal cell is a “guest-host” cell containing a mixture of a liquid solution and liquid crystals. ### Claim at position 8 (depends on 6) 8: The laminated glazed unit according to claim 6, wherein the liquid crystal cell is a polymer-dispersed liquid crystal (PDLC) system or a cholesteric liquid crystal (CLC) system or a polymer network liquid crystal (PNLC) system. ### Claim at position 9 (depends on 4) 9: The laminated glazed unit according to claim 4, wherein the flexible transparent substrate having a technical function is an infrared-reflecting film. ### Claim at position 10 (depends on 1) 10: The laminated glazed unit according to claim 1, wherein the OCA is a transparent adhesive material deposited in liquid form and crosslinked. ### Claim at position 11 (depends on 1) 11: The laminated glazed unit according to claim 1, wherein the OCA is a transparent material in the form of a polymerized film, preferably a pressure sensitive film. ### Claim at position 12 (depends on 1) 12: The laminated glazed unit according to claim 1, wherein the OCA is a transparent adhesive material in the form of a crosslinked post-adhesive film. ### Claim at position 13 (depends on 1) 13: The laminated glazed unit according to claim 1, wherein the OCA is selected from the group consisting of an acrylic-based OCA, a polyvinyl acetate-based OCA, a polyurethane-based OCA, a silicon-based OCA, and an epoxy-based OCA. ### Claim at position 14 (depends on 1) 14: The laminated glazed unit according to claim 1, which is bent.