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1. WO2011062932 - ENSEMBLE FLEXIBLE ET SON PROCÉDÉ DE FABRICATION ET D'UTILISATION

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:

1. An assembly comprising:

a pressure sensitive adhesive layer at least 0.25 mm in thickness disposed on a barrier assembly, wherein the barrier assembly comprises a polymeric film substrate and a barrier film, and wherein the assembly is flexible and transmissive to visible and infrared light.

2. An assembly according to claim 1, wherein the polymeric film substrate has a major surface, the barrier film has opposing first and second major surfaces, and the pressure sensitive adhesive layer has opposing third and fourth major surfaces, wherein the first major surface of the barrier film is disposed on the major surface of the polymeric film substrate, and wherein the third major surface of the pressure sensitive adhesive is disposed on the second major surface of the barrier film.

3. The assembly according to claim 1 or 2, wherein the pressure sensitive adhesive comprises polyisobutylene.

4. The assembly according to any preceding claim, wherein the pressure sensitive adhesive is free of added solvent.

5. The assembly according to any preceding claim, wherein the pressure sensitive adhesive further comprises at least one of a ultraviolet absorber, a hindered amine light stabilizer, or an antioxidant.

6. The assembly according to any preceding claim, wherein the polymeric film substrate comprises a fluoropolymer.

7. The assembly according to any preceding claim, wherein the polymeric film substrate is a multi-layer optical film.

8. The assembly according to claim 7, wherein the polymeric film substrate comprises an ultraviolet-reflective multilayer optical film having first and second major surfaces and comprising an ultraviolet-reflective optical layer stack, where the ultraviolet-reflective optical layer stack comprises first optical layers and second optical layers, wherein at least a portion of the first optical layers and at least a portion of the second optical layers are in intimate contact and have different refractive indexes, and wherein the multilayer optical film further comprises a ultraviolet absorber in at least one of the first optical layer, the second optical layer, or a third layer disposed on at least one of the first or second major surfaces.

9. The assembly according to any preceding claim, wherein the barrier film comprises at least first and second polymer layers separated by an inorganic barrier layer.

10. The assembly according to any preceding claim, wherein the assembly is in the form of a roll.

11. The assembly according to any one of claims 1 to 10, wherein the assembly is disposed on, above, or around a photovoltaic cell.

12. The assembly according to claim 11, wherein the photovoltaic cell is a CIGS cell.

13. A method of making the assembly according to any one of claims 1 to 10, the method comprising:

providing the barrier assembly comprising the polymeric film substrate and the barrier film;

extruding the pressure sensitive adhesive by solventless extrusion; and

applying the pressure sensitive adhesive to the barrier assembly.

14. A method of making a photovoltaic module, the method comprising:

applying the assembly according to any one of claims 1 to 10 to the front surface of a photovoltaic cell.

15. The method according to claim 14, wherein the photovoltaic cell comprises a flexible film substrate.

16. A pressure sensitive adhesive comprising:

a polyisobutylene having a weight average molecular weight less than 300,000 grams per mole; and

a hydrogenated hydrocarbon tackifier,

wherein the pressure sensitive adhesive is in the form of a film at least 0.25 mm thick.

17. A method of making a pressure sensitive adhesive, the method comprising:

hot melt extruding an extrudable composition comprising a polyisobutylene having a weight average molecular weight of at least 500,000 grams per mole and a hydrogenated hydrocarbon tackifier, wherein the hot melt extruding is carried out at a temperature sufficient to decrease the weight average molecular weight of the polyisobutylene resin to less than 300,000 grams per mole such that a pressure sensitive adhesive comprising a hydrogenated hydrocarbon tackifier and a polyisobutylene resin having a weight average molecular weight less than 300,000 grams per mole is formed.