Ultrasonic circular weaving machine is also known as ultrasonic non-woven bag making machine. It is used for bonding thermoplastic materials, such as non-woven fabrics, typically at a frequency of 20000 Hz.

Compared to traditional needle type wire stitching, the fully automatic non-woven fabric bag making machine utilizes ultrasonic bonding, eliminates the use of needle and thread, eliminates the need for thread replacement, eliminates the situation of broken joints in traditional thread stitching, and can also perform clean local cutting and sealing on non-woven fabrics. It works fast, the sealed edges do not crack, do not damage fabric edges, and there are no burrs or curls. At the same time, ultrasonic bonding effectively avoids fiber degradation caused by thermal bonding, the adhesive layer affects the porosity of the material, and causes delamination and other problems after receiving liquid impact.

The ultrasonic bonding equipment mainly consists of an ultrasonic generator and a roller, and the main components of the ultrasonic generator include horn, power supply, and transformer. Horn, also known as a radiation head, can concentrate sound waves onto a single plane. Roller, also known as anvil, is used to gather the heat released from the horn of the ultrasonic generator. The bonded material is placed between the ultrasonic generator "horn" and the roller for continuous operation, and is bonded together under low static force. A frequency converter converts electrical energy into high-frequency electrical energy, which is then converted into ultrasonic oscillator and converted into vibration energy. An amplification system (intensifier) amplifies the vibration energy and transmits it to the horn. Acoustic tools are in contact with the material to be bonded. These super auditory frequencies cause mechanical pressure between material molecules, release heat, destroy the molecular bonding in the material, cause material melting at the bonding point, and then use mechanical pressure to bond two or more layers of materials together.