Clark L J, Sherwin R P, Baker R F
Department of Microbiology, University of Southern California School of Medicine, Los Angeles 90033.
Contraception. 1989 Mar;39(3):245-51. doi: 10.1016/0010-7824(89)90057-7.
Commercial non-lubricated latex condoms were unpackaged and exposed in an environmental chamber to ozone levels (0.3 ppm) commonly present in urban smog conditions. Deterioration was observed by scanning electron microscopy after 18 hours exposure. Loss of mechanical strength was quantitated by measurement of the air pressures necessary to burst the condom and volumes at burst. After 24 hours exposure to ozone the latex surface was covered with craters and after 48 hours the pressure required to burst the condom was 44% that of control samples. Data suggest the need for study of the effectiveness of lubrication and packaging in protecting condoms from environmental factors which may accelerate deterioration.
将商业用非润滑乳胶避孕套拆开包装,置于环境试验箱中,暴露于城市烟雾环境中常见的臭氧水平(0.3 ppm)下。暴露18小时后,通过扫描电子显微镜观察其劣化情况。通过测量避孕套破裂所需的气压和破裂时的体积来定量机械强度的损失。暴露于臭氧24小时后,乳胶表面布满坑洼,48小时后,使避孕套破裂所需的压力为对照样品的44%。数据表明,需要研究润滑和包装在保护避孕套免受可能加速其劣化的环境因素影响方面的有效性。