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Vibration, Friction and Heat Create Alternative Method for Joining Materials
Ultrasonic welding uses high frequency, low amplitude vibration to create heat between the two materials being joined. When used with plastics, it is important that both materials are made from similar amorphous polymers and have near equivalent melting points. The thermal rise in the bonded area is produced by the absorption of vibrations and the friction of the surfaces of the parts. The material plasticizes locally, creating an insoluble connection between both parts within a very short period of time.
The joint quality is uniform because the energy transfer and the released heat remains constant and is limited to the joining area. Ultrasonic welding is fast and clean and is well-suited for small parts. For example, ultrasonic welding can be used to create an anti-microbial cover using non-woven fabric material.
Ultrasonic welding provides a complementary technology to Fabrico’s adhesive alternatives.