Vous êtes-vous déjà demandé comment un sac imperméable pouvait survivre à des rafales de nuages et à des eaux vives sans la moindre couture ? La réponse est le soudage à haute fréquence (HF), la technologie de base de notre usine chinoise. Au lieu de percer des trous avec des aiguilles, nous fusionnons le film TPU en une seule feuille solide, créant ainsi un joint qui est en fait plus résistant que le matériau lui-même.
What happens inside the machine?
- Two TPU panels are placed between precision copper electrodes.
- A 27.12 MHz electromagnetic field vibrates the polar molecules, generating instant, localised heat (≈ 200 °C) in less than half a second.
- Simultaneous pressure (5–8 bar) forces the molled polymer chains to inter-lock.
- The weld cools under clamp, forming a continuous, seamless seal—no glue, no stitch holes, no weak points.
Why importers specify HF welding
- Waterproof rating: IPX-7 straight off the weld jig—30 min submersion, zero ingress.
- Mechanical strength: Peel value ≥ 300 N/5 cm; when we pull to break, the fabric tears before the seam.
- Clean aesthetics: razor-straight edges, transparent panels, laser-etched logos—retail-ready out of the press.
- Weight saving: losing seam tape and reinforcement patches trims 8–12 % from finished weight, cutting your freight cost.
From kayaks to grocery aisles
Our daily output covers roll-top dry bags, soft cooler backpacks, medical pouches and fishing sling packs—each welded, leak-tested and shipped under one roof. With 18 HF stations we can produce 60 000 pcs/month, MOQ 300 pcs/style and 30-day FOB lead-time for EU/US customers.
Test the technology—free
Send us your logo; we’ll weld two A4 samples and express them to you in under a week—no mould fee, no MOQ. See for yourself why fusion beats stitching, and give your brand a seam that never leaks.
Contact us today for a fast quotation or virtual factory tour.
