Influences of wall structure of textile based vascular prostheses on properties
To improve the clinical safety and effectiveness of vascular prostheses,influence laws of the wall structure of textile based vascular prostheses on the properties were studied in this article.Polyester multifilament was utilized to weave four types of vascular prostheses samples with varying specifications based on the number of weft yarns and warp density.The total tightness of the fabric ranged from 79.6%,82.0%,89.2%to 96.4%.The impact of different wall structures on the water permeability and biomechanical properties of the vascular prostheses were examined.The results demonstrate an exponential correlation between total tightness and both water permeability and biomechanical properties of the tubular wall.When the warp density is 900 pieces/10 cm,and the weft yarn is double-ply(222 dtex/96 f)with total tightness of 96.4%,the performance of vascular prostheses is optimal.At this time,the porosity is 50.95%and the water permeability is only 12.1 mL/(cm2·min).Furthermore,the circumferential tensile strength can reach 243.5×10-5 kN/mm,and the probe burst strength can reach 595.23×10-3 kN,which are both superior to the compared domestic commercial woven polyester vascular prostheses and have a certain significance for reference.
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