疝气修补网片的工艺参数对其力学性能的影响

Effect of Technological Parameters of Hernia Repair Mesh on Mechanical Properties

以进口医用级聚丙烯单丝为原料,在机号为12针/25.4 mm的拉舍尔经编机上通过改变牵拉密度,编织出菱形网眼、圆形网眼和六角形网眼结构的疝气修补网片各5种试样,并给出了织物的结构参数。对上述15种织物分别进行纵横向拉伸和顶破试验,结果表明:机上牵拉密度与网片孔隙率呈线性关系;牵拉密度与网片拉伸强力呈二次函数关系;牵拉密度与网片顶破强力也呈线性关系;在编织原料、整经工艺、牵拉密度、定形工艺等外部条件一致时,圆形网孔网片的力学性能较为优异,表现在顶破性能较大,拉伸各向同性较好。

The paper introduces the structure parameters of five kinds of sample nets for each kind of diamond, round and hexagonal hernia developed on raschel machines with the gauge of 12 G, by using the imported medical grade PP monofilament as raw materials and changing the traction density. The results of the longitudinal and trans- verse tensile test and the bursting test of these fabric show that： the drawing-off density has a linear relationship with the porosity, a quadratic function with the tensile strength, and a linear relationship with the bursting strength. When the external conditions such as raw materials, warping process, drawing-off density, setting process are con- sistent, the mechanical properties of round mesh is excellent, which has larger bursting properties and good tensile isotropic.