一种径向高回弹聚四氟乙烯管膜的制备方法、应用
By setting guide grooves on the inner wall of the die and optimizing the extrusion cooling process, the problem of insufficient radial resilience of polytetrafluoroethylene (PTFE) tubular membranes has been solved, resulting in tubular membranes with high resilience performance, suitable for artificial blood vessels and other fields that require radial resilience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HANGZHOU JIHAI FILTRATION TECH CO LTD
- Filing Date
- 2024-01-26
- Publication Date
- 2026-07-17
AI Technical Summary
The existing polytetrafluoroethylene (PTFE) membrane has insufficient radial resilience, which leads to poor blood flow and affects the performance of artificial blood vessels.
Multiple guide grooves are provided on the inner wall of the die sleeve. The extension direction of the guide grooves forms an angle of 35 to 75° with the end face. Lateral shear force is applied to make the fiber orientation of the tubular film form an inclination angle of 50 to 80° with the radial direction. Combined with appropriate extrusion and cooling processes, the radial resilience performance is improved.
It significantly improves the radial resilience and pore uniformity of polytetrafluoroethylene (PTFE) membranes, making them suitable for applications in the field of artificial blood vessels.
Smart Images
Figure CN118046550B_ABST