Table 2
Sustainable backsheet material candidates for PV module construction.
| # | Material description | Sustainable feature | Remark |
|---|---|---|---|
| 1 | Bio-based polyethylene terephtalate (bio-PET)** | Bio-based, recyclable | Pros: nearly the same properties as oil-based PET backsheets Cons: still to be found out 30% organic content (ethylene glycol) |
| 2 | Polylactic Acid (PLA#2)*** | Bio-based, bio-degradable | Pros: rigidity, good adhesion to EVA Cons: high WVTR, low weatherability Only small plates initially available |
| 3 | PLA#3 | Bio-based, bio-degradable | Thin film with a special primer for the enhanced adhesion with EVA encapsulants Pros: intrinsically improved sustainability Cons: poor barrier properties and hydrolysis stability |
| 4 | PLA#4 and bio-PET#2 with coating** | Bio-based, bio-degradable | Only small plates initially available, that were treated with experimental coatings for better adhesion |
| 5 | PA11*** | Bio-based, recyclable | Pros: rigidity, high melting point Cons: expected low UV-stability Only small plates initially available |
| 6 | Polybutylene succinate (PBS)*** | Bio-based, bio-degradable | Pros: sufficient rigidity Cons: melting point too low |
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