Effect of Heat-Setting on Structural Parameters and Mechanical Properties of PP Monofilament Hernia Patch  

作　　者：LIU Yuan-yuan CHEN Nan-liang 

机构地区：[1]College of Textiles, Donghua University, Shanghai 201620, China [2]Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University, Shanghai 201620, China

出　　处：《Journal of Donghua University(English Edition)》2014年第5期654-658,共5页东华大学学报（英文版）

基　　金：National Key Technology R&D Program,China

摘　　要：General surgery hernia is a common and frequently- occurring disease in the world. In the tension-free hernia repair surgery, polypropylene （PP） patch has been confirmed as the most popular surgical implants. In this study, domestic medical PP monofilament was selected as raw material whose diameter was 0.15 mm, and the patch was knitted in the warp knitting machine of 12E gauge with one bar. Using the method of orthogonal experiment with three factors and three levels, the best heat-setting process of PP mesh was determined at the temperature of 130 ~C with 10 min under tension-free conditions. The relationship between heat-setting tension and performance of the patch was discussed. Patches with different porosity were prepared, and then structural parameters including density, thickness, porosity, and mechanical properties including tensile breaking strength, bursting strength, tearing strength, flexural rigidity and suture pulling out strength were tested and compared. The experimental results show that： the smaller of the patch＇s density, the higher of the porosity; other properties including density, thickness, bending stiffness, tensile breaking strength, bursting strength, tear strength, and suture pulling out strength reduce in varying degrees. This different degree of reduction is worth summarizing.General surgery hernia is a common and frequentlyoccurring disease in the world.In the tension-free hernia repair surgery,polypropylene( PP) patch has been confirmed as the most popular surgical implants.In this study, domestic medical PP monofilament was selected as raw material whose diameter was 0.15 mm,and the patch was knitted in the warp knitting machine of 12 E gauge with one bar.Using the method of orthogonal experiment with three factors and three levels,the best heat-setting process of PP mesh was determined at the temperature of 130 ℃ with 10 min under tension-free conditions.The relationship between heat-setting tension and performance of the patch was discussed.Patches with different porosity were prepared,and then structural parameters including density,thickness,porosity,and mechanical properties including tensile breaking strength, bursting strength, tearing strength,flexural rigidity and suture pulling out strength were tested and compared.The experimental results show that: the smaller of the patch's density, the higher of the porosity; other properties including density, thickness, bending stiffness, tensile breaking strength,bursting strength,tear strength,and suture pulling out strength reduce in varying degrees.This different degree of reduction is worth summarizing.

关 键 词：hernia patch polypropylene (PP) porosity heat-settingtension structural parameters MECHANICAL properties 

分 类 号：TS186.5[轻工技术与工程—纺织材料与纺织品设计] TB31[轻工技术与工程—纺织科学与工程]