Polypropylene-Based Polymer Locking Ligation System Manufacturing by the Ultrasonic Micromolding Process

In recent years, there has been a growing demand for biocompatible medical devices on the microscale. However, manufacturing of certain microfeatures posed significant challenge. To address this limitation, new process called ultrasonic injection molding or (USM) emerged as potential solution. study, we focused production specific microdevice known Hem-O-Lok, which is designed ligation and tissue repair during laparoscopic surgery. Utilizing USM technology, successfully manufactured using nonabsorbable biopolymer that offers necessary flexibility easy handling use. ensure high-quality microdevices, extensively investigated various processing parameters such vibration amplitude, temperature, velocity. Through careful experimentation, determined achieved optimal quality when under conditions maximum vibrational amplitude temperatures 50 60 °C. This conclusion was supported by measurements critical microfeatures. Additionally, our materials characterization efforts revealed presence carbonyl (C=O) group resulting from thermo-oxidation air in plasticizing chamber. finding contributes to enhanced thermal stability microdevices within temperature range 429–437