Photovoltaic Applications

Hostaphan® Polyester Films

Polyester films can be used in a variety of constructions that are either mounted on the back of photovoltaic solar modules (crystalline) or used as a part of the construction for coated flexible photovoltaic solar modules (thin film). There are many different constructions available on the market, but most use polyester film in one or all layers of the lamination. Hostaphan® Polyester Film can be used as a backsheet in a single ply or can be used as a part of a lamination for backsheet.

Hostaphan® Polyester Film delivers the following superior product attributes to photovoltaic applications:
  • Superior electrical properties (partial discharge voltage up to 1076 VDC)
  • Dimensionally stable
  • Excellent flatness
  • Chemical resistance and environmental durability
  • Wide range of thicknesses available – 12 μm – 250 μm (0.5 mil – 10 mil)
  • Varying opacity and colors – hazy, ultra clear, white, black
  • Available with one or two side coating for adhesion
  • Available with UV blocking
  • Ease of handling
Hostaphan® Polyester Film Products available for the photovoltaic market are as follows:
Product Thickness (μm) Key Customer Attributes
2307N 50 – 175 Back sheet laminations, standard hydrolysis stability
8LH1 50-175 Back sheet laminations, high hydrolysis stability, 105°C RTI
WSAC 50 – 250 White back sheet, two-side coated for EVA and silicone adhesion
WPV6D 50 – 250 White back sheet, two-side coated for EVA and silicone adhesion with enhanced hydrolysis resistance
BPV7D 50 – 90 Black back sheet, two-side coated for EVA and silicone adhesion with enhanced hydrolysis resistance (Developmental)
7333UV 12 – 50 Ultra clear, UV blocking film, enhanced environmental durability, chemically treated on one side for hard coat adhesion

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