WSD-1556 PV Backsheet Coating
- WSD-1556 is the main component of a two-component fluorocarbon coating. When used with an isocyanate curing agent, it is suitable for high-performance transparent coated backsheets for solar PV modules.
- It provides excellent adhesion to PET and EVA substrates, along with outstanding 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-1556 |
| Appearance | HG/T2814-2009 | Slightly hazy liquid |
| Solid Content | GB/T2793-1995 | 50%-54% |
| Viscosity (25°C) | GB/T 2794-2013 | 400-600mPa·s |
| Solvent: Propylene Glycol Methyl Ether Acetate (PMA) | ||
| Process Recommendations | ||
| Processing Performance | Item | Recommendations |
| Test Substrate | PET | |
| Pretreatment | Corona treatment | |
| Coating Thickness | Dry film thickness >10 μm | |
| Oven Conditions | ≥170°C × 1 min | |
| Curing Conditions | Can be directly laminated. | |
| Post-Treatment | Corona treatment on the coated surface before lamination. | |
| Coating Method: Suitable for dry lamination equipment with gravure rollers. Curing Agent: Covestro N3300 is recommended. Main Resin/Curing Agent Ratio: WSD-1556/N3300 = 25/1. |
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