WSD-1555 PV Backsheet Coating
- WSD-1555 is the main component of a two-component fluorocarbon coating.
- When used with an isocyanate curing agent, it is suitable for high-performance coated backsheets for solar PV modules.
- It provides excellent adhesion to PET and EVA substrates, along with strong damp heat aging resistance. With proper formulation, it can pass the PCT 48 h aging test.
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| Performance Indicators | Test Standard | WSD-1555 |
| Appearance | HG/T2814-2009 | White viscous paste |
| Solid Content | GB/T2793-1995 | 58%-62% |
| Viscosity (25°C） | GB/T 2794-2013 | 50-200mPa·s |
| Solvent: Butyl Acetate | ||
| Process Recommendations | ||
| Processing Performance | Item | Recommendations |
| Test Substrate | PET | |
| Pretreatment | Corona treatment | |
| Coating Thickness | 3-6μm | |
| Oven Conditions | ≥150°C × 1 min | |
| Curing Conditions | Room temperature for 24 h + 50°C × 60 h | |
| Coating Method: Suitable for dry lamination equipment with gravure rollers. Curing Agent: Covestro N3390 is recommended. Main Resin/Curing Agent Ratio: WSD-1555/N3390 = 20/1. |
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