LIGHT DIFFUSING SOLAR CONTROL FILM

• US 20080292820A1
• Filed: 05/23/2007
• Published: 11/27/2008
• Est. Priority Date: 05/23/2007
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Padiyath, Raghunath, Huntley, Douglas A.
• Application Number:
  US11/752,368
• Publication Number:
  US 20080292820A1
• Time in Patent Office: Days
• US Class Current: 428/34
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10055 with at least one intermediate air space
• CPC Class Codes: B32B 27/06 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: B32B 7/023 Optical properties
• 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: G02B 5/021 the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
• CPC Class Codes: G02B 5/0242 by means of dispersed particles
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/282 reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

A light diffusing solar control film includes a multilayer film that transmits visible light and reflects infrared light, and a light diffusing layer or surface adjacent to the multilayer film forming a light diffusing solar control film. The light diffusing solar control film has a haze value of 10% or greater.

Claims

1. A light diffusing solar control film comprising:

a multilayer film that transmits visible light and reflects infrared light; and

a light diffusing layer or surface adjacent to the multilayer film forming a light diffusing solar control film;

wherein, the light diffusing solar control film has a haze value of 10% or greater.

2. A light diffusing solar control film according to claim 1, wherein the multilayer film is a multilayer polymeric film.

3. A light diffusing solar control film according to claim 1, wherein the multilayer film comprises a plurality of metal layers.

4. A light diffusing solar control film according to claim 1, wherein the light diffusing layer comprises particles dispersed within a binder, wherein the particles and the binder have different refractive indices.

5. A light diffusing solar control film according to claim 1, wherein the light diffusing surface comprises a textured surface.

6. A light diffusing solar control film according to claim 1, wherein the light diffusing solar control film has a haze value of 30% or greater.

7. A light diffusing solar control film according to claim 4, wherein the particles have a first refractive index, the binder has a second refractive index and the second refractive index is at least a value of 0.05 greater than or less than the first refractive index.

8. A light diffusing solar control film according to claim 2, wherein the multilayer polymeric infrared light reflecting film comprises a plurality of alternating polymeric layers of a first polymer material and a second polymer material and at least one of the alternating layers is birefringent and orientated and the alternating polymeric layers cooperate to reflect infrared light and visible light is transmitted through the multilayer polymeric infrared light reflecting film.

9. A light diffusing solar control film according to claim 1, further comprising an infrared light absorbing nanoparticle layer disposed adjacent to the multilayer polymeric film.

10. A light diffusing solar control film according to claim 9, wherein the infrared absorbing nanoparticle layer comprises lanthanum hexaboride, antimony tin oxide, or indium tin oxide.

11. A light diffusing solar control film according to claim 1, further comprising an adhesive layer disposed between the multilayer film and the light diffusing layer and the adhesive layer comprising an ultraviolet light absorbing material.

12. A light diffusing solar control glazing unit, comprising:

a glass substrate; and

a light diffusing solar control film disposed on the glass substrate, the light diffusing solar control film comprising;

a multilayer film that transmits visible light and reflects infrared light; and

a light diffusing layer or surface adjacent to the multilayer film forming a diffusing solar control film;

wherein the light diffusing solar control film has a haze value of 10% or greater.

13. A light diffusing solar control glazing unit according to claim 12, wherein the multilayer film is a multilayer polymeric film.

14. A light diffusing solar control glazing unit according to claim 12, further comprising an adhesive layer disposed between the multilayer film and the glass substrate and the adhesive layer comprising an ultraviolet light absorbing material.

15. A light diffusing solar control glazing unit according to claim 12, wherein the glass substrate has a surface area value and the light diffusing solar control film is disposed on only a portion of the surface area value.

16. A light diffusing solar control glazing unit according to claim 12, wherein the light diffusing layer comprises particles dispersed within a binder, wherein the particles and the binder have different refractive indices.

17. A light diffusing solar control glazing unit according to claim 16, wherein the particles have a first refractive index, the binder has a second refractive index and the second refractive index is at least a value of 0.05 greater than or less than the first refractive index.

18. A light diffusing solar control glazing unit according to claim 12, further comprising a second glass substrate and the diffusing solar control film is disposed between the glass substrate and the second glass substrate.

19. A light diffusing solar control glazing unit according to claim 18, wherein the light diffusing solar control glazing unit is an insulated glazing unit comprising a sealed volume of gas between the glass substrate and the second glass substrate.

20. A light diffusing solar control glazing unit according to claim 13, wherein the multilayer polymeric infrared light reflecting film comprises a plurality of alternating polymeric layers of a first polymer material and a second polymer material and at least one of the alternating layers is birefringent and orientated and the alternating polymeric layers cooperate to reflect infrared light and visible light is transmitted through the multilayer polymeric infrared light reflecting film.

21. A light diffusing solar control glazing unit according to claim 12, further comprising an infrared light absorbing nanoparticle layer disposed adjacent to the multilayer film.

22. A light diffusing solar control glazing unit according to claim 12, wherein the light diffusing surface comprises a textured surface.

23. A light diffusing solar control glazing unit according to claim 12, wherein the light diffusing solar control film has a haze value of 30% or greater.