Insulated glazing units and microoptical layer comprising microstructured diffuser and methods

• US 9,970,614 B2
• Filed: 10/06/2015
• Issued: 05/15/2018
• Est. Priority Date: 10/20/2014
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Meyer, Justin P., Wolk, Martin B., Hoffend, Jr., Thomas R., McMan, Steven J., Hennen, Daniel W., Schwartz, Evan L.
• Primary Examiner(s): MAHONEY, CHRISTOPHER E
• Application Number:
  US15/519,945
• Publication Number:
  US 20170335620A1
• Time in Patent Office: 952 Days
• CPC Class Codes: B32B 2307/304 Insulating
• CPC Class Codes: B32B 2307/408 Matt, dull surface
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/418 Refractive
• CPC Class Codes: B32B 2307/538 Roughness
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 27/283 comprising polysiloxanes
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 3/266 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 7/06 permitting easy separation
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: E06B 2009/2405 Areas of differing opacity for light transmission control
• CPC Class Codes: E06B 2009/2417 Light path control; means to control reflection
• CPC Class Codes: E06B 3/67 characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
• CPC Class Codes: E06B 3/6715 specially adapted for increased thermal insulation or for controlled passage of light E06B3/66323 takes precedence; coating of glass pains C03C17/00; devices or arrangements for controlling the intensity, colour, phase, polarisation or direction of light G02F1/00
• CPC Class Codes: E06B 3/70 Door leaves wing frames E06B3/04
• CPC Class Codes: E06B 9/24 Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blindsoperating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00
• CPC Class Codes: F21S 11/007 characterised by the means for transmitting light into the interior of a building
• CPC Class Codes: G02B 5/02 Diffusing elements; Afocal elements
• CPC Class Codes: G02B 5/0231 : the surface having microprismatic or micropyramidal shape macroscopic prism arrays G02B5/045
• CPC Class Codes: G02B 5/0268 : characterized by the fabrication or manufacturing method
• CPC Class Codes: G02B 5/0278 : used in transmission

Abstract

Transfer tapes and methods of making transfer tapes are described. In one aspect, the transfer tape comprises a template layer having a structured surface; a backfill layer disposed on at least a portion of the template layer, the backfill layer having a microstructured surface opposite the structured surface; and a layer disposed adjacent the microstructured surface, wherein the layer disposed adjacent the microstructured surface has a refractive index that differs from the backfill layer. The microstructured surface together with the adjacent layer functions as a diffusive layer, or in other words a diffusive interface. Also described are microoptical glazing and methods of making microoptical glazing as well as insulated glazing units and methods of making insulated glazing units.

Claims

1. A transfer tape, comprising:

a removable template layer having a structured surface;

a backfill layer having a first surface disposed on at least a portion of the structured surface of the template layer, and a second surface opposite the structured surface wherein the second surface comprises a microstructured surface;

a layer disposed on at least a portion of the microstructured surface wherein the layer has a refractive index that differs from the backfill layer.

2. The transfer tape of claim 1 wherein the microstructured surface together with the layer disposed on at least a portion of the microstructured surface is a diffusive layer.

3. The transfer tape of claim 1 wherein the layer comprises an adhesive.

4. The transfer tape of claim 3 wherein the adhesive comprises a polydiorganosiloxane polyoxamide copolymer.

5. The transfer tape of claim 3 wherein the adhesive layer is disposed in a pattern on the microstructured surface of the backfill layer.

6. The transfer tape of claim 1 wherein the backfill layer has a refractive index greater than the adhesive layer.

7. The transfer tape of claim 1, wherein the backfill material comprise a polysiloxane material.

8. The transfer tape of claim 1 further comprising a carrier film disposed on a planar surface of the template layer opposite the structured surface.

9. The transfer tape of claim 1 further comprising a transfer layer disposed between the structured surface of the template layer and the backfill layer.

10. The transfer tape of claim 9 wherein the transfer layer comprises a release coating.

11. The transfer tape of claim 1 wherein the structured surface comprises a microoptical refractive surface.

12. The transfer tape of claim 1 wherein the structured surface comprises surface features greater than about 10 microns in height.

13. The transfer tape of claim 1 wherein the backfill layer is disposed in a pattern on the structured surface of the template layer.

14. The transfer tape of claim 13 wherein the pattern comprises a plurality of islands, lines, or a combination of islands and lines.

15. A microoptical glazing comprising:

a pane of glass having a major surface;

a microoptical layer bonded to at least a portion of the major surface, the microoptical layer comprising a cured backfill layer wherein the microoptical layer has a structured surface and opposing microstructured surface, and a layer adjacent the microstructured surface having a refractive index that differs from the backfill layer.

16. The microoptical glazing of claim 15 wherein the layer adjacent the microstructured surface is an adhesive and the adhesive bonds the microoptical layer to the major surface of the pane of glass.

17. The microoptical glazing of claim 15 wherein there is no organic polymeric film substrate between the microoptical layer and the pane of glass.

18. A microoptical glazing comprising:

a pane of glass having a major surface;

a microoptical layer bonded to at least a portion of the major surface, and

a microstructured interface adjacent a layer having a different refractive index;

wherein for an input angle ranging from 30°

to 60°

the microoptical glazing redirects upwards at least 80% of daylight and does not exhibit a solar column.

19. The insulating glass unit of claim 18 wherein the structured surface is adjacent a gas filling the gap, such that sunlight passing through the outside surface is refracted by the structured surface before passing through the inside surface.

20. An insulated glazing unit, comprising:

a pane of glass having a sun-facing pane exterior surface separated by a gap from a pane of glass having a room-facing exterior surface, each pane having an interior surface adjacent the gap; and

a microoptical layer bonded to at least a portion of an interior surface of a pane of glass, the microoptical layer comprising a cured backfill layer, wherein the microoptical layer has a structured surface and an opposing microstructured surface adjacent a layer having a refractive index that differs from the backfill layer.

21. The insulated glazing unit of claim 20 wherein the layer adjacent the microstructured surface is an adhesive and the adhesive bonds the microoptical layer to the major surface of the pane of glass.

22. An insulated glazing unit, comprising

a pane of glass having a sun-facing pane exterior surface separated by a gap from a pane of glass having a room-facing exterior surface, each pane having an interior surface adjacent the gap;

and

a microoptical layer disposed on an interior surface of the insulated glazing unit; and

a microstructured interface disposed between the microoptical layer and the room-facing exterior surface.

23. The insulated glass unit of claim 22 wherein the microoptical layer has a structured surface and an opposing planar surface wherein the planar surface is bonded to a microstructured interface of an interior sun-facing surface of the pane of glass with an adhesive.

24. The insulated glass unit of claim 22 wherein the microoptical layer has a structured surface and an opposing planar surface and the microstructured interface is disposed on the exterior room-facing surface of the pane of glass.

25. The microoptical glazing of claim 22 wherein there is no organic polymeric film substrate between the microoptical layer and the pane of glass.