What Is Ultrasonic Edge Sealing?
Direct Answer
Ultrasonic edge sealing is a bonding method that uses high-frequency vibration to melt and fuse nonwoven edges without glue or heat exposure to the product.
Key Takeaways
- Ultrasonic edge sealing is a bonding method that uses high-frequency vibration to melt and fuse nonwoven edges without glue or heat exposure to the product.
- How it works: An ultrasonic horn vibrates against an anvil at high frequency; friction melts the nonwoven fibers at the edge, which fuse together as they cool.
- Sealing the edges of sanitary pads
- Ultrasonic sealing heats the whole product — in fact heat is localized to the weld line only
How Ultrasonic Edge Sealing Works
An ultrasonic horn vibrates against an anvil at high frequency; friction melts the nonwoven fibers at the edge, which fuse together as they cool. It creates clean, strong seals on sanitary pads and diaper edges without adding glue.
Examples and Applications
- Sealing the edges of sanitary pads
- Bonding leg-cuff elastics without adhesive
Ultrasonic Edge Sealing vs. Related Terms
| Term | What it is | Key difference |
|---|---|---|
| Ultrasonic Edge Sealing |
Limitations and Common Misconceptions
- Ultrasonic sealing heats the whole product — in fact heat is localized to the weld line only
What is ultrasonic edge sealing used for in hygiene products?
To bond nonwoven edges and attach elastic components without glue, producing clean, flexible and leak-resistant seals.
References
- JP CIA (industry) - Baby diaper material: key components and their functions — 行业媒体 (accessed 2026-08-02)
- EDANA - What are nonwovens? (ISO 9092 / CEN EN 29092 definition) — EDANA (accessed 2026-08-02)