Sonobond Ultrasonics’ machinery assembles leak-proof PPE, facemasks, and other medical textiles

The SeamMaster® Ultrasonic Sewing Machine
The SeamMaster® Ultrasonic Sewing Machine operates similar to a traditional sewing machine, but uses high-frequency ultrasonic waves instead of needles and thread to produce secure barrier seams.

During the current COVID-19 pandemic, when greater supplies of personal protective equipment are critically needed by hospital staff, first responders, and other healthcare providers, Sonobond Ultrasonics’ textile assembly machines help manufacturers increase production speeds while producing the barrier seams that satisfy regulatory requirements.

Advantages of ultrasonic technology

Ultrasonics is the preferred assembly method for PPE, facemasks and textile medical supplies; the technology utilizes high-frequency sound waves that cause heating and plasticization of synthetic materials, producing the high-quality, regulatory-compliant bonds that eliminate leaking issues caused by stitch holes and glue gaps.

Our machinery quickly creates these strong, sealed edges and secure, leak-proof seams at increased production speeds, as well as improved quality of finished items. Additionally, no thread, adhesives, tapes or other consumables are required, reducing production costs.

SeamMaster® ultrasonic sewing machines

While all our ultrasonic assembly machines produce regulatory-compliant barrier seams, our SeamMaster® Ultrasonic Sewing Machines are most often requested because of their versatility and ease of use. Their advantages include:

  • Rotary operation that softens and fuses the synthetic materials and quickly creates strong, sealed, smooth, and soft-to-the-touch seams.
  • Minimal training required since they resemble and operate like conventional sewing machines.
  • Wide variety of assembly applications, including facemasks, disposable medical gowns and shoe covers, lint-free wound dressings, pillow and mattress covers, and pouches for sterilizing and storing medical instruments.

We offer no-charge, no-obligation textile bonding viability tests to produce sample assemblies using a manufacturer’s own nonwoven or synthetic materials. This allows them to evaluate the results and confirm the quality of our process before placing an order.

Example of facemasks assembled with Sonobond Ultrasonics’ machinery
Example of facemasks assembled with Sonobond Ultrasonics’ machinery.

SeamMaster® Ultrasonic Sewing Machine meets regulatory requirements
SeamMaster® Ultrasonic Sewing Machine meets regulatory requirements for barrier seams in nonwoven material used for medical gowns, facemasks and other nonwoven textile medical supplies.

Is Sonobond continuing to make machines even as other businesses are shutting down to combat the spread of COVID-19?

Yes. However, due to high demand and our adherence to CDC safety measures to protect our staff and the community, orders are not filled as quickly as usual.

What’s the best way to contact Sonobond for immediate or additional information?

Please call +1 610-696-4710; or contact Vice President Melissa Alleman at

Visit to view our “how to” video for assembling regulatory-compliant facemasks in just one minute.

Sonobond Ultrasonics





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