GSO ISO 19918:2023由GSO 发布于 2023-05-03。
GSO ISO 19918:2023在国际标准分类中归属于: 13.340.10 防护服装。
GSO ISO 19918:2023 防护服 化学品防护 低蒸气压化学品透过材料累积渗透的测量的最新版本是哪一版?
最新版本是 GSO ISO 19918:2023 。
ISO 19918 describes laboratory test methods to determine the resistance of materials, closures, and seams used in personal protective equipment (PPE) to permeation by solid or liquid chemicals with low vapour pressure (less than 133,322 Pa at 25 °C) and/or insolubility in water or other liquids commonly used as collection media. These chemicals that are often part of pesticide formulations and other mixtures cannot be measured using other standards for measuring permeation. This test method is suitable for field strength and concentrated pesticide formulations as well as other mixtures in which the active ingredient is a chemical with low vapour pressure and/or low solubility in commonly used liquid and gaseous collection media. This test method is not intended to be used in place of standards such as ISO 6529, EN 16523-1 and ASTM F739, which measure permeation of chemicals that are either volatile or soluble in water or other liquids that do not interact with the material being tested. ISO 19918 is not suitable for measurement of volatile chemicals that may evaporate before the chemical analysis is complete. The degree of contamination depends on numerous factors, such as type of exposure, application technique, and chemical formulation. As the level of exposure can vary considerably, this method is designed to rate relative performance of PPE materials for different durations. This method is designed to measure cumulative permeation. Breakthrough time cannot be measured by this method. This test method does not measure resistance to penetration or degradation. The test method standard may be used for the evaluation of PPE materials that are new or those for which the product standard requires treatment, such as laundering or simulated abrasion. Details of the treatment shall be reported.
优点:成本低、物理性能好,重型款式具有良好的防切割性,以及出色的灵活性。缺点:对油脂和有机化合物的防护性较差;有蛋白质过敏的风险。 聚氯乙烯(PVC) 以聚氯乙烯为材料制成的手套通常分重型有衬手套、轻型一次性手套两种,能防止强酸、强碱、盐溶液和一些重型有机化学品的侵蚀,具有良好的耐磨性和耐切割性。 优点:成本低,物理性能不错,过敏反应的风险最低。...
利用干燥的18G针头每周对每个100mL瓶的衬垫穿刺4次,共5周,每个衬垫共穿刺20次,并且每周从100mL瓶中采集三份相同的样品。通过卡尔费休滴定法测量吸湿率。通过测量一段时间内渗透至瓶中的O2量,确定氧气透过率。该测试证明了瓶盖和衬垫随时间推移而保持气密性的能力。综合测试证实,Sure/Seal™系统即使在多次穿刺后也能保持低吸水性,效果显著。...
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