LAMINATED STRUCTURES AND METHOD OF FORMING THE SAME

• US 3,816,201 A
• Filed: 02/22/1973
• Issued: 06/11/1974
• Est. Priority Date: 03/26/1970
• Status: Expired due to Term

• Current Assignee: Herbert Hoover III, Ramsey C. Armstrong
• Original Assignee: Herbert Hoover III, Ramsey C. Armstrong
• Inventors: Armstrong, Ramsey C., Hoover, Herbert III
• Primary Examiner(s): Fritsch, Daniel J.
• Application Number:
  US05/334,922
• Time in Patent Office: 474 Days
• Field of Search: 156/99,102,104,106 161/194,197,199,214,218 219/203 117/211,119
• US Class Current: 156/106
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10009 characterized by the number, the constitution or treatment of glass sheets
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 3/86 the heating conductors being embedded in the transparent or reflecting material H05B3/845 takes precedence

Abstract

Flexible sublaminates suitable for lamination between rigid transparent dielectric plies to form electrically powerable transparent safety glass-type constructions are prepared by first disposing on at least one surface of a carrier film a thin, adherent electrically conductive metallic coating and subsequently laminating to the metal-coated surface an interlayer film to form a flexible coherent laminar structure transparent when its exterior surfaces are smooth. Carrier films employed have an ultimate elongation of less than about 150 percent and tensile strength greater than about 5000 psi; interlayer films have ultimate elongation greater than about 150 percent and tensile strength less than about 6500 psi. Exemplary conductive metals are gold, silver, chromium, copper, and Inconel.

Claims

2. The method of claim 1 wherein in step C a second interlayer film is interposed between one of said plies and the exposed surface of said carrier film prior to lamination of said plies to said structure.

3. The method of claim 1 wherein but one surface of the carrier film is metal-coated.

4. The method of claim 3 wherein an interlayer film is laminated only to the metal-coated surface of the carrier film.

5. The method of claim 3 wherein a second interlayer film is laminated to the surface of the carrier film opposite the metal-coated surface thereof such that the non-adhered surfaces of the interlayer films present the exterior surfaces to the sublaminar structure.

6. The method of claim 5 wherein the interlayer films present textured exterior surfaces which are adapted to be made smooth by said further lamination of said structure between said plies.

7. The method of claim 1 wherein the said carrier film is a polyethylene terephthalate polyester film and wherein said interlayer film is selected from the group consisting of polyvinyl butral, polyvinyl chloride and polyurethane films.

8. The method of claim 1 wherein the said carrier film has an ultimate elongation of less than about 150 percent and tensile strength greater than about 5,000 psi, and wherein said interlayer film has an ultimate elongation of greater than about 150 percent and tensile strength less than about 6,000 psi.

9. The method of claim 7 wherein said conductive metal is selected from the group consisting of gold, silver, chromium, copper and Inconel.

10. The method of claim 8 wherein said conductive metal is selected from the group consisting of gold, silver, chromium, copper and Inconel.

11. The method of claim 9 wherein said interlayer film is polyvinyl butyral.

12. The method of claim 9 wherein said conductive metal is gold.