This invention relates to suture technology, falling under IPC classification A61B 17/06, specifically concerning a preparation process for knotless barbed sutures. It comprises the following steps: S1, Preparation of spinning material: Mixing plasticizer with PPDO (poly(p-dioxanone)), followed by extrusion through a twin-screw extruder and pelletization to obtain spinning material; S2, Spinning: Dry the spinning material to a moisture content below 0.005 wt%, then feed it into a spinning machine for spinning. After cooling, the filament is obtained as primary fiber; S3, Drawing: Draw the primary fiber to obtain raw fiber; S4, Dyeing: Immerse the raw fiber in a dye solution tank, then dry it to obtain dyed raw fiber; S5, Cutting and Barbing: Clamp both ends of the dyed filament with fixtures, then cut the surface with a blade to create barbed suture threads. Selecting specific plasticizers not only improves PPDO's poor flexibility and heat resistance but also enhances its tensile strength.
Country Code: CN
Application Number: CN202111611545.2
