医用防护服织物的结构与透湿量

Structure and water vapor permeability of fabric for medical protective wear

采用扫描电子显微镜观察了医用防护服织物的结构,分析了不同复合结构的特征,分别用吸湿法和蒸发法测试了医用防护服织物的透湿量,以及模拟穿着多层织物的状态时医用防护服织物的透湿量。结果表明,聚四氟乙烯(PTFE)膜层压织物透湿量高,聚氨酯(PU)涂层织物及热塑性聚氨酯(TPU)涂层非织造布透湿量低,且有明显的涂层缺陷,有剥落现象。试样蒸发法透湿量普遍较吸湿法透湿量小,且试样间透湿量差异小。随层数的增加,多层织物组合试样透湿性有所下降。

The structure of the fabric for medical protective wear was observed with the scan electron microscope （SEM）, and the characteristics of fabrics with various composite structure were analyzed, The water vapor permeability of the protective fabrics was tested with the moisture absorption method and the evaporation respectively. The water vapor permeability of the multilayer fabric under simulated medical wear was tested too. The experiments show that polytetrafluoroethylene （PTFE） membrane laminated fabric possesses a high water vapor permeability, while PU coated fabric and TPU coated non-woven fabric possess a low water vapor permeability as well as obvious coating defects and exfoliating. Compared with the moisture absorption method, the the evaporation test indicates a small value of the water vapor permeability under the same conditions. The water vapor permeability declines as the layer of the fabric increases.