Ultrasonic Welding of Blood Filter

Ultrasonic welding has played a major role in the development of a novel filtration method for autologous transfusion, i.e. recycling a patients own blood in the operating theatre.

Process

The sensitive filter material is cased between two ABS (acrylonitrile butadiene styrene) parts. One half features a 0.3mm projection which acts as the energy director. Parts are held under pressure and welded at an ultrasonic frequency of 20kHz within seconds using Herfurth 1800W USM 100 Series 3 machine for Haemocell plc.

Benefits of ultrasonic welding

Hermetic seal
Localised melting
Short weld time
Easily automated
Design flexibility

Terms & Conditions | Privacy Policy