Pet photovoltaic glue board customization

What is PU based adhesive?

Polyurethane (PU)-based adhesive layers, ranging from 6.5 to 8.5 µm thick, were used to bond the PET outer/PET core layers and the PET core/EVA inner layers, respectively. The PPE A backsheet had a slightly lower barium sulfate (BaSO 4) and titanium dioxide (TiO 2) pigment content in the PET outer and pigmented EVA layers, respectively ( Table 1 ).

Why are PU-based adhesives degraded in PV backsheets?

Degradation of PU-based adhesives in PV backsheets has been reported, and its mechanism has been attributed to moisture accumulation due to hydrophilicity of the adhesives and subsequent thermo-hydrolytic degradation (Omazic et al., 2019, Voronko et al., 2014 ).

Can a titanium beam be adhered to a pet backsheet?

The titanium beams were adhered to the PET side of the backsheet using the same procedure. PET has a notoriously low density of functional groups at the polymer surface (Jorgensen et al., 2006), which makes adhering test beams to the polymer surface particularly difficult.

Why is pet a difficult polymer?

PET has a notoriously low density of functional groups at the polymer surface (Jorgensen et al., 2006), which makes adhering test beams to the polymer surface particularly difficult. To promote adhesion, the surface of the PET was functionalized using a handheld corona plasma treater (Electro-Technic Products, Chicago, IL, USA), prior to epoxying.