Use of a polymer composite for the production of photovoltaic modules
A plastic composite including a carrier material of polyethylene terephthalate (PET), polyethylene naphthalate (PEN) or ethylene tetrafluoroethylene copolymer (ETFE), and polyamide-12 layers (PA-12) adjoining the carrier material on both sides, can be utilized for the production of photovoltaic modules. The combination of carrier material with PA-12 provides improved insulating capacity for the module along with improved adhesion of the composite layers.
1. A plastic composite for photovoltaic modules, comprising:
a carrier material of polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), and
polyamide-12 layers adjoining the carrier material on both sides.
2. The plastic composite according to claim 1 , wherein the carrier material is non-positively joined to the polyamide-12-layers by an adhesive layer.
3. The plastic composite according to claim 2 , wherein an adhesive in the adhesive layer is a polyurethane; and/or a polyester adhesive.
4. The plastic composite according to claim 1 , wherein the composite is produced by co-extrusion.
5. The plastic composite according to claim 4 , further comprising at least one adhesion promoter layer between the carrier material and one or more of the polyamide-12 layers.
6. The plastic composite according to claim 1 , comprising a polymer film provided with an oxide layer deposited from a vapour phase, positioned between the layers.
7. The plastic composite according to claim 6 , wherein the polymer film comprises:
a film of polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), and
a co-extrudate therefrom in a form of films or film composites.
8. The plastic composite according to claim 6 , wherein the oxide layer comprises an aluminium oxide or silicon oxide.
9. The plastic composite according to claim 1 , comprising an aluminium film positioned between the layers.
10. The plastic composite according to claim 1 , further comprising an adhesion layer on at least one surface of the carrier material.
11. The plastic composite according to claim 10 , wherein the adhesion layer is single- or multi-layered and comprises at least one of polyurethane, polyester and polyacrylate.
12. The plastic composite according to claim 10 , wherein the adhesion layer is applied by a means for co-extrusion.
13. The plastic composite according to claim 10 , wherein the adhesion layer is applied by a roller application unit.
14. The plastic composite according to claim 1 , wherein at least one of the carrier material and the polyamide-12 layer is coloured.
15. The plastic composite according to claim 1 , wherein the carrier material is pretreated by a means for physical media.
16. The plastic composite according to claim 1 , further comprising a sealing layer applied to at least one of the polyamide-12 layer.
17. The plastic composite according to claim 16 , wherein the sealing layer comprises:
at least one of ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), ionomers, polymethyl methacrylate (PMMA), polyurethane, polyester or hotmelt, and
co-extrudates thereof in a form of films or film composites.
18. The plastic composite according to claim 16 , wherein the polyamide-12 layer is treated physically and/or chemically on a surface that is applied to the sealing layer.
19. The plastic composite according to claim 7 , wherein the oxide layer deposited from the vapour phase comprises aluminum oxide or silicon oxide.
20. A photovoltaic module, comprising:
(i) a solar cell;
(ii) a carrier layer of polyethylene terephthalate (PET) or polyethylene naphthalate (PEN);
(iii) a film layer of polyamide-12 (PA-12), said film layer applied to each of a first side and a second side of the carrier layer; and
(iv) a sealing layer of applied to at least one of the film layers of PA-12 (iii).