For quality cup mask in standard such as N95 or higher.
This line finishes needle punched fabric layer forming by heat, PP & Filtration layer forming by ultrasonic sealing and cutting; different layers sealing together by ultrasonic and hydraulic cutting; nose clip attached by ultrasonic or heating; elastic band attaching by ultrasonic or stapling.
Optional: holing for exhalation valve, valve attaching by ultrasonic, pad printing for logo information.
For more detail, please check "Cup Mask Production Line"
Study: How to make N95 Cup Mask?