热定型对不同结构聚丙烯疝修补片力学性能的影响

Heat Setting and Mechanical Properties of Polypropylene Hernia Mesh with Different Structures

采用正交试验对3种不同组织结构(经缎组织、经平与经缎复合组织、变化经平组织)的聚丙烯疝修补片进行热定型处理,探讨了热定型温度、时间和外加张力对补片力学性能(拉伸强力、撕裂强力、顶破强力和缝合线抗拉强力)的影响。结果表明:温度对3种不同组织结构补片的力学性能影响均最大,时间和外加张力的影响相对较小。通过极差与水平和的分析发现,对于补片的力学性能而言,经缎组织结构、经平与经缎复合组织结构、变化经平组织结构补片获得较好力学性能的热定型工艺参数均为温度130℃、时间10min以及外加张力为零。

The orthogonal array was designed for heat setting of hernia meshes with three different structures(atlas stitch,atlas based on tricot stitch,varied tricot stitch).The influences of heat setting parameters including temperature,time and external tension on mechanical properties(tensile strength,tear strength,bursting strength and laddering-after-drawing strength)of polypropylene(PP)meshes were investigated.The results show that temperature has more significant influence than tension and time on mechanical properties of PP meshes.It shows that the optimum process parameters for the atlas stitch,atlas based on tricot stitch and varied tricot stitch mesh are 130℃,10 minutes and no external tension.