Transparent glazing and use thereof in a chilling chamber door comprising in particular a glazing under vacuum

• US 7,003,920 B1
• Filed: 05/25/2000
• Issued: 02/28/2006
• Est. Priority Date: 05/25/1999
• Status: Expired due to Term

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Inventors: Hebert, Anne-Sophie, Messere, Rino, Florentin, Jean-Michel
• Primary Examiner(s): RICKMAN, HOLLY C
• Application Number:
  US09/926,609
• Time in Patent Office: 2,105 Days
• Field of Search: 428/323, 428/325, 428/331, 428/332, 428/334, 428/913, 428/423.1, 428/426, 428/441, 428/434, 527/861, 527/861.1, 527/941, 522/045, 527/841, 312/405
• US Class Current: 52/204.5
• CPC Class Codes: A47F 3/0434 Glass or transparent panels
• CPC Class Codes: C03C 17/22 with other inorganic material C03C17/34, C03C17/44 take precedence
• CPC Class Codes: C03C 17/32 with synthetic or natural resins C03C17/30 takes precedence
• CPC Class Codes: F25D 2201/14 using subatmospheric pressure
• CPC Class Codes: F25D 23/02 Doors; Covers F25D23/08 takes precedence locks or fastenings E05B65/0042
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/263 Coating layer not in excess of 5 mils thick or equivalent
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31645 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

A transparent glazing unit having at least one viewing area, combined with an antifrosting adsorbent layer deposited on at least one surface of the said area, and its use in a door of a refrigerated enclosure and more particularly a glazed door, the glazed area of which essentially consists of a vacuum glazing unit.

Claims

1. A refrigerator door enclosure, comprising a metal door frame, a transparent glazing, a handle, and a hinge, said glazing comprising at least one viewing area, wherein the viewing area has deposited on at least one surface thereof an antifrosting adsorbent layer consisting essentially of a porous polymeric coating of a three dimensional network of polyvinylpyrrolidone and polyurethane, and wherein:

the antifrosting adsorbent layer has a thickness of at least 14.5 microns and at most 100 microns; and

said at least one surface and antifrosting adsorbent layer, after being maintained in a closed refrigerated environment at −

28°

C., prevents the visible formation of condensation and frosting upon exposure to room temperature and humidity for twelve seconds.

2. The refrigerator door enclosure according to claim 1, wherein the antifrosting adsorbent layer has a thickness of less than 20 microns.

3. The refrigerator door enclosure according to claim 1, wherein said at least one surface and antifrosting adsorbent layer, after being maintained in a closed refrigerated environment at −

28°

C., prevents the visible formation of condensation and frosting upon exposure to room temperature and humidity for three minutes.