Ultrasonic Bonding Technology for Nonwovens
topic
Ultrasonic bonding uses high-frequency mechanical vibration at 20 to 40 kilohertz generated by piezoelectric transducers pressed against the nonwoven web through a patterned anvil roll, creating localised frictional heating at fibre contact points that melts thermoplastic fibres to form bond points without external heat application, with bonding pattern determined by anvil roll engraving and bond energy controlled by vibration amplitude and pressure.
Role
Provides rapid, clean thermal bonding of thermoplastic nonwovens without oven heating that enables high-speed converting operations including garment assembly seam bonding, filter cartridge construction, and medical device assembly where the precise, localised heating of ultrasonic bonding minimises heat damage to surrounding material while providing strong, water-resistant bonds not achievable with mechanical fastening or cold adhesive methods.