Ultrasonic bonding
without a single thread
Ultrasonic welding fuses synthetic fabrics using high-frequency vibration — creating clean, strong, thread-free seams that are lighter, more flexible, and aesthetically superior to traditional stitching.
Vibration that fuses fabric at a molecular level
Ultrasonic sewing & cutting
Simultaneous cutting and sealing in one pass. Creates clean, sealed edges with no fraying — ideal for activewear, lingerie, and technical garments.
Ultrasonic welding
Joins two layers of synthetic fabric without stitching. Produces an invisible seam with superior stretch recovery and a smooth second-skin feel.
Embossing & patterning
Custom sonotrode patterns create embossed textures, decorative seams, or structural channels directly in the fabric surface.
Machine optimization
We develop and validate the exact tape, temperature, pressure, and speed parameters for your specific fabric and construction — then document it in an SOP for your factory.
Threadless Sewing & Seaming
Creates smooth, strong, and less bulky seams in synthetic fabrics without traditional thread. It looks and works like a traditional sewing machine, making it easy to move around curves and simple for operators to learn
Watertight Seam Integrity
Delivers highly reliable, watertight seams ideal for demanding sportswear, outdoor gear, and medical garments. Seams can be further reinforced by applying tape to either the exterior or underside, guaranteeing absolute barrier protection and durability.
Precision & Tool Flexibility
Equipped with interchangeable tools and a Swiss-crafted 35kHz generator for ultimate processing flexibility. A built-in microprocessor automatically regulates and optimizes the energy output, guaranteeing high-precision and consistent seam quality.
Smart Setup & Energy Saving
Features an intuitive HMI touchscreen for fast programming and straightforward machine configuration. An intelligent, integrated energy-saving system automatically deactivates the air supply when idle, conserving power and compressed air.
Ultrasonic capability driven by Queen's Award for Innovation
CE
Certified machines
Ultrasonic vs traditional stitching
Factor
Ultrasonic bonding
Traditional stitching
Thread used
None - fused directly
Yes - multiple layers of thread
Seam bulk
Minimal - flat, clean finish
High - thread adds bulk and stiffness
Flexibility
Excellent - moves with fabric
Can restrict stretch and movement
Water resistance
Inherently water-resistant
Needle holes create leak points
Speed
High - continuous operation
Moderate - needle speed limitations
Fabric compatibility
Synthetic fabrics only (≥ 65% synthetic)
Works on all fabric types
Where ultrasonic bonding excels
Ultrasonic bonding FAQ
What fabrics are compatible with ultrasonic welding?
Ultrasonic welding works on fabrics with a synthetic content of 65% or more — including nylon, polyester, spandex blends, TPU laminates, and non-wovens. It does not work effectively on natural fibres like cotton, wool, or silk, as these do not melt when vibrated.
Are ultrasonically bonded seams as strong as stitched seams?
Yes, when an ultrasonic weld is combined with a high-performance reinforced taping, the resulting seam can match or exceed the strength of traditional stitched seams on compatible fabrics. While a standalone ultrasonic seam provides a clean, raw edge, adding the reinforced tape ensures maximum tensile strength, durability, and a completely waterproof finish. We validate this combined bond strength through destructive pull testing and wash cycle performance trials before signing off on any production process
Our machine is producing inconsistent welds — can you help?
Yes. Inconsistent welds are usually caused by amplitude settings, horn wear, fabric tension variation, or speed mismatches. We can diagnose and correct these issues on-site or remotely, and retrain operators to maintain consistency in production.
Can ultrasonic bonding be combined with seam sealing?
Yes. For maximum waterproofing performance, ultrasonic-welded seams can additionally be seam-sealed with thermoplastic tape. This hybrid approach is used in high-specification outerwear and specialist technical garments.
Ready to go
thread-free?
Our ultrasonic specialists can assess your fabric and recommend the right bonding approach for your garment.
