DX-70S Ultrasonic Sewing Machine The DX-70S is a threadless ultrasonic sewing machine that creates strong, sealed seams using high-frequency vibration instead of traditional thread. This eliminates lint and thread waste entirely, preventing contamination risks in sensitive applications. Ideal for non-woven fabrics, synthetic textiles, and bag manufacturing, it delivers clean, durable seams without needle holes. The pneumatic design ensures smooth operation, making it perfect for leak-proof and hygiene-focused products.