1.1 本试验方法涵盖了在各种条件下在柔性聚氯乙烯塑料（PVC）最终化合物中观察到的渗出的测定。推荐该方法用于在相同条件下同时比较不同制剂。考虑到所有可能的成分和树脂类型，该方法可以覆盖广泛的增塑PVC配方。 1.2 该方法使用国际单位制(SI)，根据IEEE/ASTM SI-10美国公制实践国家标准。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 增塑剂和其他制剂成分可能迁移并积聚在PVC树脂熔融化合物的表面上。这种现象通常被描述为渗出或开花。渗出物可以通过在清洁表面之前和之后称重柔性PVC样品来测量，其中重量差异指示在一段时间后积聚在表面上并通过清洁过程去除的渗出物的重量。该测试方法不评估随时间的质量损失，因为实验开始时样品的质量不相关。该测试方法测量在一段时间(即八周)内每时间单位(即周)测量在PVC化合物表面上累积的渗出物的量，以生成渗出物随时间累积的曲线。 5.1.1 该测试使标准测试样本经受一组选定的条件，并允许定量测定一段时间内积累的渗出物的量。 5.1.2 该测试仅适用于不同PVC配方之间的比较目的，在实验期间条件相同。 5.1.3 增塑剂或其它组分与随后渗出的相容性的明显降低可导致过多的污垢拾取、涂漆或清漆表面的损坏、粘性或油性感觉以及许多其它相关问题。5.1.4 当在一段时间内观察增塑的PVC片材时，可能观察到一些组分的迁移。持续两周的测试用于筛选高渗出材料，而持续八至十六周的延长测试用于完整的概况。 附注1: 允许卖方和买方就时间、温度或相对湿度的测试条件达成一致。

1.1 This test method covers the determination of exudation observed in final compounds of flexible Poly(Vinyl Chloride) Plastics (PVC) in various conditions. The method is recommended for comparison of different formulations under the same conditions at the same time. The method can cover a wide range of plasticized PVC formulations, considering all possible ingredients and resin types. 1.2 This method uses the International System of Units (SI), according to IEEE/ASTM SI-10 American National Standard for Metric Practice. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 It is possible for plasticizers and other formulation ingredients to migrate and accumulate on the surface of a PVC resin fused compound. This phenomenon is commonly described as exudation or blooming. The exudation can be measured by weighing the flexible PVC sample before and after cleaning the surface, where the weight difference indicates the weight of the exudate that had accumulated on the surface after a certain period of time and was removed by the cleaning procedure. This test method does not evaluate mass loss over time, as the mass of the sample at the beginning of the experiment is not relevant. This test method measures the amount of exudate accumulated on the surface of the PVC compound, measured every time unit (that is, week), over a period of time (that is, eight weeks) to generate a curve of exudate accumulation over time. 5.1.1 This test subjects a standard test specimen to a chosen set of conditions and allows quantitative determination of the amount of exudate that accumulates over a period of time. 5.1.2 This test is applicable only for comparison purposes between different PVC formulations, with equal conditions during the length of the experiment. 5.1.3 An apparent decrease in compatibility of plasticizers or other components with subsequent exudation can cause excessive dirt pickup, marring of lacquered or varnished surfaces, sticky or oily feel, and a number of other associated problems. 5.1.4 When a plasticized PVC sheet is observed over a period of time, the migration of some components might be observed. A test of two week's duration is used for screening of high exudation materials, while an extended test of eight to sixteen weeks duration is used for a complete profile. Note 1: It is permissible for the seller and the purchaser to agree upon test conditions of time, temperature, or relative humidity.