标准摘要
[中文适用范围]: 本国际标准规定了测定与特定测试溶液滴接触的塑料薄膜和片材表面润湿张力的方法。 2 塑料薄膜保留油墨、涂层、粘合剂等的能力主要取决于其表面的特性,并且可以通过几种表面处理技术之一来改进。 已发现这些相同的处理技术可以增加与溶剂混合物接触的塑料薄膜表面的润湿张力。 因此,可以将塑料薄膜表面的润湿张力与其接受和保留油墨、涂料、粘合剂等的能力联系起来。 特定薄膜表面的测量润湿张力只能与可接受的油墨、涂料或粘合剂相关。 通过经验保留。 润湿张力本身并不是衡量油墨、涂层或粘合剂附着力的完全可接受的指标。 3 薄膜表面的任何污染以及液体试剂中任何微量的表面活性杂质都可能影响润湿张力。 因此,重要的是不要触摸或摩擦待测试的薄膜表面部分,所有设备都要严格清洁,并且仔细控制试剂纯度。 特别是玻璃装置,很可能被具有很强的表面张力降低能力的清洁剂污染,除非采取特定的预防措施来确保不存在这些清洁剂,例如用氧化剂清洁,例如铬-硫酸或硫酸-铵过二硫酸盐,并用蒸馏水冲洗。 4 当被测材料表面与试验溶液发生化学反应时,本试验不适用。 5 值得注意的是,塑料薄膜和片材的表面性能可能会因老化过程而发生变化。 因此,测量结果必须与胶片的年龄相关。 [外文原描述]: ISO 8296:2003 specifies a method for determining the wetting tension of surfaces of plastic film and sheeting in contact with drops of specific test solutions. The ability of plastic films to retain inks, coatings, adhesives, etc., is primarily dependent on the character of their surfaces, and can be improved by one of several surface-treatment techniques. These same treatment techniques have been found to increase the wetting tension of a plastic film surface in contact with mixtures of solvents. It is therefore possible to relate the wetting tension of a plastic film surface to its ability to accept and retain inks, coatings, adhesives, etc. The measured wetting tension of a specific film surface can only be related to acceptable ink, coating, or adhesive retention through experience. Wetting tension, in itself, is not a completely acceptable measure of ink, coating or adhesive adhesion. The test is not applicable when the surface of the material to be tested reacts chemically with the test solution.
英文名称Plastics — Film and sheeting — Determination of wetting tension