DIN ISO 8296-2008 塑料.薄膜和薄板.湿润表面张力的测定

标准号：DIN ISO 8296-2008
中文标准名称：塑料.薄膜和薄板.湿润表面张力的测定
英文标准名称：Plastics - Film and sheeting - Determination of wetting tension (ISO 8296:2003);English version of DIN ISO 8296:2008-03
标准类型：G33
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G33
国际标准分类号：83.140.10
引用标准：ISO 291
适用范围：1.1 This International Standard specifies a method for determining the wetting tension of surfaces of plasticfilm and sheeting in contact with drops of specific test solutions.1.2 The ability of plastic films to retain inks, coatings, adhesives, etc., is primarily dependent on the characterof their surfaces, and can be improved by one of several surface-treatment techniques. These same treatmenttechniques have been found to increase the wetting tension of a plastic film surface in contact with mixtures ofsolvents. It is therefore possible to relate the wetting tension of a plastic film surface to its ability to accept andretain inks. coatings, adhesives, etc. The measured wetting tension of a specific film surface can only be relatedto acceptable ink, coating, or adhesive retention through experience. Wetting tension, in itself, is not acompletely acceptable measure of ink, coating or adhesive adhesion.1.3 Any contamination of the film surface and any trace of surface-active impurities in the liquid reagents mayaffect the wetting tension. It is therefore important that the portion of the film surface to be tested is not touched Oor rubbed, that all equipment be scrupulously clean, and that reagent purity be carefully controlled. Glassapparatus, in particular, is likely to be contaminated with detergents having very strong surface tension reducingability, unless specific precautions are taken to ensure their absence such as by cleaning with an oxidizingagent, for example chromic-sulfuric acid or sulfuric acid-ammonium peroxydisulfate, and rinsing with distilledwater.1.4 The test is not applicable when the surface of the material to be tested reacts chemically with the testsolution.1.5 It should be noted that surface properties of plastic film and sheeting may change by ageing processes.The measurements must therefore be related to the age of the film.