Effect of fiber materials on structure and mechanical properties of woven vascular graft fabrics
In order to explore the effect laws of fiber materials on structure and mechanical properties of woven vascular graft fabrics,four types of polyester multifilaments,including drawn-texturing yarn(DTY),fully drawn yarn(FDY),preoriented yarn-fully drawn yarn(POY-FDY)and high-tech fully drawn yarn(HT-FDY),were used as weft yarn to design and prepare vascular graft fabrics with different fiber materials.The effects of weft materials with different characteristics on the vascular graft fabric structure,water permeability and mechanical properties were analyzed.The results show that the use of materials with different heat shrinkage characteristics can help to realize the design of woven vascular graft fabrics with different sizes and shapes.There is a great correlation between the circumferential tensile properties of fabrics and the breaking strength of weft yarns.Fabric with POY-FDY as weft yarn has better compliance and deformation response.The water permeability of 6 kinds of woven vascular graft fabrics can meet the standard of no pre-clot,but the permeability of fabric with HT-FDY as weft yarn is not as good as that of commercial vascular graft.The water permeability of fabrics with DTY or FDY as weft yarn is pretty good,which can not only prevent blood leakage after implantation,but also maintain a certain porosity and permeability,and promote the exchange of substances inside and outside the vessel wall.Woven vascular graft fabrics with FDY as weft yarn have greater dimensional stability and lower blood leakage at the initial stage of implantation.
万方数据
维普
