Tear resistant solar control multilayer film

• US 20080075948A1
• Filed: 09/27/2006
• Published: 03/27/2008
• Est. Priority Date: 09/27/2006
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Haak, Christopher A., Padiyath, Raghunath, Strauss, Stephen J., Huntley, Douglas A.
• Granted Patent: US 7,906,202 B2
• Time in Patent Office: Days
• US Class Current: 428/328
• CPC Class Codes: B32B 17/10 of synthetic resin
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• 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 5/281 designed for the infrared light
• CPC Class Codes: G02B 5/287 comprising at least one layer of organic material
• 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 428/265 1 mil or less
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]

Abstract

A tear resistant solar control multilayer film article is disclosed. The multilayer film article includes an infrared light reflecting multilayer film having alternating polymeric layers of a first polymer type and a second polymer type and the alternating polymeric layers cooperate to reflect infrared light; an infrared light absorbing nanoparticle layer including a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder, the infrared light absorbing nanoparticle layer being adjacent the infrared light reflecting multilayer film, and a tear resistant polymeric film disposed adjacent to the infrared light reflecting multilayer film.

Claims

1. A multilayer film article comprising:

an infrared light reflecting multilayer film having alternating polymeric layers of a first polymer type and a second polymer type and the alternating polymeric layers cooperate to reflect infrared light;

an infrared light absorbing nanoparticle layer comprising a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder, the infrared light absorbing nanoparticle layer being adjacent the infrared light reflecting multilayer film; and

a tear resistant polymeric film disposed adjacent to the infrared light reflecting multilayer film.

2. A multilayer film article according to claim 1 wherein the metal oxide nanoparticles comprises antimony tin oxide, doped antimony tin oxide, indium doped tin oxide, or antimony doped indium tin oxide dispersed in a cured polyacrylate binder.

3. A multilayer film article according to claim 1 wherein the multilayer film article has a moisture vapor transmission rate value of 1 g/m²·

day or greater.

4. A multilayer film article according to claim 1 wherein the infrared light absorbing nanoparticle layer has a thickness in a range from 1 to 20 micrometers.

5. A multilayer film article according to claim 1 wherein the multilayer film article has a visible light transmission value of 40% or greater and a shading coefficient value of at least 0.68.

6. A multilayer film article according to claim 1 further comprising a pressure sensitive adhesive layer disposed on the tear resistant film, the tear resistant multilayer film disposed between the pressure sensitive adhesive layer and the infrared light reflecting multilayer film.

7. A multilayer film article according to claim 6 further comprising a water soluble overcoat layer disposed on the pressure sensitive adhesive layer.

8. A multilayer film article according to claim 7 further comprising a release liner disposed on the overcoat layer.

9. A multilayer film article according to claim 1 wherein the tear resistant film is a multilayer film comprising alternating layers of a stiff polymer and a ductile polymer.

10. A multilayer film article according to claim 9 wherein the multilayer tear resistant film has a Graves elongation at break of at least 20% and a tensile modulus of at least 175 kpsi in at least one direction of the multilayer tear resistant film.

11. A multilayer film article according to claim 1 wherein the tear resistant film comprises at least two multilayer tear resistant film layers.

12. A shatterproof light control article for blocking infrared light emitted from an infrared light source comprising:

an infrared light reflecting multilayer film having alternating polymeric layers of a first polymer type and a second polymer type and the alternating polymeric layers cooperate to reflect infrared light;

an infrared light absorbing nanoparticle layer comprising a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder, the infrared light absorbing nanoparticle layer being adjacent the infrared light reflecting multilayer film;

a glass substrate disposed adjacent the infrared light reflecting multilayer film; and

a tear resistant polymeric film disposed between the infrared light reflecting multilayer film and the glass substrate.

13. A shatterproof light control article according to claim 12 wherein the infrared light absorbing nanoparticle layer has a thickness in a range from 1 to 20 micrometers.

14. A shatterproof light control article according to claim 12 wherein the shatterproof light control article has a visible light transmission value of 40% or greater and a shading coefficient value of at least 0.68.

15. A shatterproof light control article according to claim 12 further comprising a pressure sensitive adhesive layer disposed between the tear resistant film and the glass substrate.

16. A tear resistant multilayer film article comprising:

an infrared light reflecting multilayer film having alternating polymeric layers of a first polymer type and a second polymer type and the alternating polymeric layers cooperate to reflect infrared light;

an infrared light absorbing nanoparticle layer comprising a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder, the infrared light absorbing nanoparticle layer being adjacent the infrared light reflecting multilayer film; and

a tear resistant polymeric film disposed adjacent to the infrared light reflecting multilayer film;

wherein, the tear resistant multilayer film article has an average visible light transmission of at least 40% and an infrared light transmission of 20% or less for substantially all wavelengths between 950 nm and 2500 nm.

17. A tear resistant multilayer film article according to claim 17 wherein the tear resistant multilayer film article has a shading coefficient value of at least 0.68.

18. A tear resistant multilayer film article according to claim 17 wherein the tear resistant multilayer film article has a moisture vapor transmission rate of 1 g/m²·

day or greater.

19. A tear resistant multilayer film article according to claim 17 wherein the tear resistant film has a Graves elongation at break of at least 20% and a tensile modulus of at least 175 kpsi in at least one direction of the tear resistant film.

20. A tear resistant multilayer film article according to claim 17 wherein the tear resistant film comprises at least two tear resistant multilayer film layers.