Heated multiple layer glazings
View Patent ↗The present invention provides interlayers that comprise a polymer film onto which micro lines have been formed from a conductive material. The interlayers comprising such films can be incorporated, for example, into a two glass pane multiple layer glazing. Such glazings can be used, for example, in automobile windscreens or rear window applications or other applications that require a heated glazing panel.
1. A multiple layer glazing interlayer, comprising:
a polymer layer comprising a polymer selected from the group consisting of: poly(vinyl butyral), polyurethane, polyvinyl chloride, poly(ethylene-co-vinyl acetate), polyethylene, polyethylene copolymers, partially neutralized ethylene/(meth)acrylic copolymers, and combinations thereof;
a polymer film disposed in contact with said polymer layer, wherein said polymer film comprises polyethylene terephthalate and electrically conductive heated micro lines having a thickness of 5 to 25 microns;
an input electrode; and,
an output electrode, wherein said input electrode and said output electrode are in electrical continuity with said micro lines.
2. The glazing interlayer of claim 1 , wherein said polymer layer comprises poly(vinyl butyral).
3. The glazing interlayer of claim 1 , wherein said micro lines have a thickness of 5 to 15 microns.
4. The glazing interlayer of claim 1 , wherein said micro lines are formed as parallel lines.
5. The glazing interlayer of claim 1 , where said micro lines comprise a metal or carbon nanotubes.
6. The glazing interlayer of claim 1 , wherein said micro lines are formed in a grid pattern.
7. The glazing interlayer of claim 1 , wherein said polymer film has a surface resistivity of 0.050 to 5 ohms per square.
8. The glazing interlayer of claim 1 , further comprising a second polymer layer disposed in contact with said polymer film.
9. The glazing interlayer of claim 1 , wherein said glazing interlayer has a transparency of at least 70%.
10. A multiple layer glazing, comprising:
two glazing panes; and,
a multiple layer glazing interlayer disposed between said glazing panes, comprising,
a polymer layer comprising a polymer selected from the group consisting of: polyvinyl (vinyl butyral), polyurethane, polyvinyl chloride, poly(ethylene-co-vinyl acetate), polyethylene, polyethylene copolymers, partially neutralized ethylene/(meth)acrylic copolymers, and combinations thereof;
a polymer film disposed in contact with said polymer layer, wherein said polymer film comprises polyethylene terephthalate and electrically conductive heated micro lines having a thickness of 5 to 25 microns;
an input electrode; and,
an output electrode, wherein said input electrode and said output electrode are in electrical continuity with said micro lines.
11. The multiple layer glazing of claim 10 , wherein said polymer layer comprises poly(vinyl butyral).
12. The multiple layer glazing of claim 10 , wherein said micro lines have a thickness of 5 to 15 microns.
13. The multiple layer glazing of claim 10 , wherein said micro lines are formed as parallel lines.
14. The multiple layer glazing of claim 10 , where said micro lines comprise a metal or carbon nanotubes.
15. The multiple layer glazing of claim 10 , wherein said micro lines are formed in a grid pattern.
16. The multiple layer glazing of claim 10 , wherein said polymer film has a surface resistivity of 0.050 to 5 ohms per square.
17. The multiple layer glazing of claim 10 , further comprising a second polymer layer disposed in contact with said polymer film.
18. The multiple layer glazing of claim 10 , wherein said glazing interlayer has a transparency of at least 70%.
19. A method of heating a vehicle windshield, comprising:
providing a multiple layer glazing, comprising:
two glazing panes; and,
a multiple layer glazing interlayer disposed between said glazing panes, comprising,
a polymer layer comprising a polymer selected from the group consisting of: poly(vinyl butyral), polyurethane, polyvinyl chloride, poly(ethylene-co-vinyl acetate), polyethylene, polyethylene copolymers, partially neutralized ethylene/(meth)acrylic copolymers, and combinations thereof;
a polymer film disposed in contact with said polymer layer, wherein said polymer film comprises polyethylene terephthalate and electrically conductive heated micro lines having a thickness of 5 to 25 microns;
an input electrode; and,
an output electrode, wherein said input electrode and said output electrode are in electrical continuity with said micro lines; and,
applying a voltage potential across said input electrode and said output electrode.