熔喷聚丙烯驻极体过滤材料对医用消毒剂的耐受性研究

熔喷聚丙烯驻极体过滤材料由于具有特殊的静电过滤机理,而显现出低流阻、高效率等优点,尤其是所具有的除尘、灭菌多功能的特点,使其成为了医用防护口罩的最佳用材。在特殊环境下的驻极体电荷稳定性是需要深入了解的关键问题。本文在前期工作的基础上,采用浸泡方法研究了材料在医用消毒剂作用下的过滤效率稳定性。结果表明:经双氧水、苯酚、戊二醛、含氯消毒剂、硼酸、甲醛、过氧乙酸和消毒酒精等医用消毒剂浸泡后,其过滤效率几乎不会衰减。但材料用洗洁精和洗衣粉清洗时,其过滤性能下降较大。因此,熔喷聚丙烯驻极体过滤材料在医用环境中使用具备良好的稳定性,可作为医用防护口罩的首选材料。但建议作为一次性呼吸防护用品使用。

Study on Stability of Melt-blown Polypropylene Electret Nonwoven on Medical Disinfectant

It was known that melt-blown polypropylene electret nonwoven was the best materials used as facepiece respirators.It had advantages of higher filtration efficiency,lower pressure drop and germicidal function because of its special electrostatic filtering mechanism.The charge stability of electret under special environment is the key problem needed to study.In this paper,the stability of filtration efficiency was investigated when the melt-blown polypropylene electret nonwoven was soaked in disinfector solution.The results showed that the filtration efficiency declined little after soaked for 24 hours in hydrogen peroxide,phenol,glutaraldehyde,chlorine-containing disinfectant,boracic acid,formaldehyde,peroxyacetic acid and rubbing alcohol.However,the filtration efficiency displayed a marked decay when it was soaked in washing-up liquid and detergent powder.It could be come to a conclusion that melt-blown polypropylene electret nonwoven was a kind of favorable facepiece respirator materials when used in medicine environment,however,it was proposed as a disposable respiratory protection production.