Encapsulated glazing product

• US 4,543,283 A
• Filed: 09/04/1984
• Issued: 09/24/1985
• Est. Priority Date: 09/04/1984
• Status: Expired due to Term

• Current Assignee: LOF Glass Incorporated
• Original Assignee: Libbey-Owens-Ford Co. (Eaton Corporation PLC.)
• Inventors: Herliczek, Siegfried H., Curtze, Edward W.
• Primary Examiner(s): VAN BALEN, WILLIAM
• Application Number:
  US06/646,942
• Time in Patent Office: 385 Days
• Field of Search: 156/102, 156/104, 156/105, 156/106, 156/107, 428/38, 428/83, 428/192
• US Class Current: 428/38
• CPC Class Codes: B29C 33/0044 for sealing off parts of inserts projecting into the mould cavity
• CPC Class Codes: B29C 45/14434 Coating brittle material, e.g. glass B29C45/14377, B29C45/14418 take precedence
• CPC Class Codes: B29C 70/763 the edges being disposed in a substantial flat plane
• CPC Class Codes: B29K 2075/00 Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2709/08 Glass
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10302 Edge sealing
• CPC Class Codes: B32B 17/1033 Laminated safety glass or glazing containing temporary protective coatings or layers
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2307/554 Wear resistance
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 2581/00 Seals; Sealing equipment; Gaskets
• CPC Class Codes: B32B 2605/08 Cars
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B60J 10/70 specially adapted for windows or windscreens
• CPC Class Codes: Y10T 428/24777 Edge feature

Abstract

A glazing unit comprised of a glass substrate and a laceration inhibiting shield supported by and extending over what would otherwise be an exposed surface of the substrate. A gasket or frame member composed of a synthetic polymer extends around a major portion of the periphery of the glass substrate and shield and is adhered to the marginal edge surfaces of each, such gasket having been polymerized in situ adjacent the said periphery and having assumed through the autogenous mechanism incident to its polymerization and cure, while confined intimate contact with the portions to which it is adhered.

Claims

1. A glazing, including a glass substrate having adhered to a major surface thereof a layer of plastic material, said plastic material having an exposed surface and being effective to provide increased anti-lacerative properties to the glass sheet when the glazing is impacted and the glass sheet broken, and a gasket extending about a major portion of the periphery of the glazing and adhered to the adjacent marginal edge surfaces of both the glass substrate and plastic layer, said gasket having been polymerized in situ adjacent said edge surfaces and having assumed through the autogenous mechanism incident to its polymerization and cure while confined intimate contact with said surfaces.

2. A glazing as defined in claim 1, wherein said gasket extends completely around the periphery of the glazing.

3. A glazing as defined in claim 1, wherein said exposed surface of said plastic layer has an abrasion resistant coating applied thereto.

4. A glazing as defined in claim 1, wherein said glass substrate is composed of a single glass sheet.

5. A glazing as defined in claim 1, wherein said substrate is composed of a plurality of glass sheets laminated together through an interposed adhesive material.

6. A glazing as defined in claim 4, wherein said glass sheet is tempered.

7. A glazing as defined in claim 4, wherein said glass sheet is heat strengthened.

8. A glazing as defined in claim 1, wherein said gasket is formed of an elastomeric material.

9. A glazing as defined in claim 1, wherein said gasket is composed of polyurethane.

10. A glazing as defined in claim 1, wherein said gasket is comprised of a microcellular polyurethane elastomer.

11. A glazing as defined in claim 1, wherein said layer of plastic material includes a thickness of polyvinyl butyral one surface of which is adhered to said major surface of glass, and a thickness of polyester adhered to the other surface of said polyvinyl butyral.

12. A glazing as defined in claim 11, wherein an abrasion resistant coating made from silica-reinforced methyl-siloxane is applied to the free surface of said thickness of polyester.

13. A glazing as defined in claim 12, wherein said gasket is comprised of a microcellular polyurethane elastomer.

14. A glazing, including at least one sheet of glass having adhered to a major surface thereof a layer of plastic material, said plastic material having an exposed surface and being effective to provide increased anti-lacerative properties to the glass sheet when the glazing is impacted and the glass sheet broken, and a gasket extending about a major portion of the periphery of the glazing and adhered to the adjacent marginal edge surfaces of both the glass and plastic layer, said gasket having been polymerized in situ adjacent said edge surfaces and having assumed through the autogenous mechanism incident to its polymerization and cure while confined intimate contact with said surfaces.

15. A glazing as defined in claim 14, wherein said gasket extends completely around the periphery of the glazing.

16. A glazing product for use in closing an opening in a structure, comprising a main body of an optically transparent sheet of glazing material, a layer of transparent plastic material adhered in superimposed and coextensive relation to at least one surface of said sheet of glazing material and a gasket formed in situ about the peripheral marginal edges of said main body and said layer and adhesively secured thereto.

17. A method of producing an anti-lacerative glazing product including a glass sheet and a gasket adhered to the periphery thereof, said method including the steps of:

assembling into a superimposed stacked arrangement a glass substrate sheet and a plastic anti-lacerative sheet;

laminating said plastic sheet to said glass sheet to form an integral assembly;

positioning said integral assembly within the interior of a mold cavity formed by a plurality of cooperating die sections, said mold cavity having the shape and position, relative to said integral assembly, of the ultimate gasket, and enclosing the marginal surfaces of the assembly immediately adjacent the periphery thereof;

injecting into the mold cavity a composition which is capable of polymerization and cure to produce a gasket and, when cured in contact therewith, adheres to the marginal surfaces of the integral laminated assembly;

controlling the pressure at which the composition is injected into the mold cavity to one sufficiently low that the glass substrate sheet and plastic anti-lacerative sheet are not damaged;

controlling the temperature of the mold cavity, the injection of the composition and the amount of the composition injected so that the composition polymerizes after its injection and assumes by the autogenous mechanism incident to polymerization intimate contact with the mold cavity and with the sheets of said integral assembly, and cures while in such contact; and

removing the resulting encapsulated anti-lacerative glazing product from the mold cavity.