The application and welding technology of PVDF-coated fabric

PVDF-Coated Fabrics for Architectural Membranes
PVDF-coated fabrics are used in architectural membrane applications such as glass curtain walls, skylights, and sunshades. Their weather resistance and anti-fouling properties ensure long-term decorative performance.

Welding Techniques for PVDF-Coated Fabrics
Welding PVDF-coated fabrics requires consideration of material properties (e.g., melting point, hygroscopicity, thermal stability). Suitable methods must be selected, and process parameters strictly controlled:

Selection of Welding Methods

Hot Plate Welding (Butt Fusion Welding)

• Applications: Pipe butt joints, sheet welding.
• Key Process Parameters:
  • Heating plate temperature: 210–230°C (slightly above the melting point of PVDF). Ensure the PTFE coating remains intact to prevent material adhesion.
  • Melting time: Adjusted based on thickness (e.g., 20–30 seconds for 4mm sheets). Pressure: 0.1–0.3 MPa to avoid material extrusion or weak fusion.
  • Cool to below 50°C before releasing pressure to prevent internal stress cracking.