Abstract
The medical polypropylene monofilament with a diameter of 0.10 mm was used as the material. Four different pull densities and two different warp run-ins were set up on the electronic traverse high-speed Tricot warp knitting machine, with the gauge of E28. The raw material was used to knit four variations of single bar plain knitted fabrics with 1 in-1 miss setting. Each variation required eight samples. The mechanical properties of the above 32 warp-knitted fabric samples are tested, including their tensile stress (in both vertical and horizontal directions), tearing stress (in both vertical and horizontal directions) and bursting stress. The results obtained shows that the relationship between the vertical, the horizontal stress, and the pull density are not monotonic. The tensile stress in the vertical direction firstly decreases and then increases with an increase of the pull density; however, the tensile stress in the horizontal direction firstly increases and then slightly decreases with an increase of the pull density; again the vertical tensile stress of all fabrics was always higher than the horizontal tensile stress. The bursting stress has a positive linear relation to the pull density. The vertical tearing stresses of four samples were greater than the horizontal tearing stress.
Highlights
Hernia has become a common disease in contemporary society
Hernia repair mesh need to meet a certain mechanical performance index, such as tensile stress, tearing stress and bursting stress, as the main role of the mesh is to resist the internal pressure of the human body and support the new tissue
Figure that the vertical stress of the fabrics always than by theloops horizontal stress, reasonseen is that warp-knitted fabric is connected alongisthe walehigher direction but connected is that the warp-knitted fabric is connected the wale direction by loops butoverlaps
Summary
Hernia has become a common disease in contemporary society. Failure to heal on time has serious consequences if left untreated. Hernia repair mesh will be directly in contact with tissue as an implantable medical device, so its performance directly affect the surgical effects and postoperative applications. The pore size and porosity of the hernia repair mesh mainly affects the tissue growth, adhesion and anti-infective ability of the cells after it has been implanted in the human body. Hernia repair mesh need to meet a certain mechanical performance index, such as tensile stress (transverse, longitudinal), tearing stress (transverse, longitudinal) and bursting stress, as the main role of the mesh is to resist the internal pressure of the human body and support the new tissue. The relationship between the mechanical properties of a hernia repair and its pull density, run-ins, and stitch structure are studied. The study is intended to lay a basis for its application in clinical medicine, and help with the structural design or technical parameter design of hernia repair mesh in the future
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