1. Why High-Frequency (HF) Welding Outperforms Hot Air
Cheap utility shelters often use basic handheld hot-air guns that melt only the surface plastic, creating brittle cold welds that peel under wind vibration.
Champion operates automated 25 kW **High-Frequency Dielectric Welding Units**:
- Radio-frequency electromagnetic fields excite the polar molecules of PVC/PVDF uniformly from the inside out.
- Base polyester fibers fuse completely with liquid polymer at molecular level.
- **Seam Tensile Strength Test:** When pulled in our electronic tensile tester (ASTM D751), the base fabric tears at 4200 N/5cm before the high-frequency welded seam separates, ensuring 100% waterproof reliability.