1.1 本试验方法包括使用基于电容技术的非接触测厚仪测定塑料膜的厚度，厚度范围为2.5至250µm。它包括一种生成一系列厚度数据点的方法，这些数据点可用于表征横向或机器方向（轮廓）的薄膜变化模式。 注1: 如果仪器设计用于测量和处理此厚度范围的材料，并且仪器符合本标准中定义的要求，则较厚的试样（通常为250µm至2500µm厚）可以使用此测试方法。 1.2 该测试方法为薄膜购买者和销售者提供了一种方法，以传达他们正在购买/销售的产品的厚度和厚度变化模式。 1.3 本试验方法不适用于纹理或多孔膜或导电或涂有导电物质的膜。 注2: 含有过量抗静电添加剂的薄膜可能具有导电性，需要进行测试，以验证其不会导致仪器上出现负读数。 1.4 单位- 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 注3: 没有已知的ISO等效于本标准。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验方法提供了计算以物理单位表示的特性所需的精确尺寸。 5.2 本试验方法提供了一种表征横向和机器方向上材料厚度可变性的方法，用于质量控制、生产过程支持和分析、进货检验以及确定购买/销售薄膜的可变性。 5.3 该测试方法提供了一种利用国家标准与技术研究所（NIST）提供的可追溯标准进行仪器校准的方法。 5.4 它并不打算取代基于商用便携式工具的其他厚度测量，也不意味着通过不同程序进行的厚度测量将完全一致。

1.1 This test method covers the determination of the thickness of plastic film, ranging in thickness from 2.5 to 250 µm, with a non-contact thickness gauge that uses capacitance-based technology. It includes a method to generate a series of thickness data points that can be used to characterize the variability patterns of film for both transverse or machine direction (profiling). Note 1: Thicker specimens, typically 250 µm to 2500 µm thick, can utilize this test method if the apparatus is designed to measure and handle materials of this thickness range, and the apparatus complies with the requirements as defined in this standard. 1.2 This test method provides a method for buyers and sellers of film to communicate the thickness and pattern of thickness variability of the product they are buying/selling. 1.3 This test method does not apply to textured or porous films or films that are conductive or coated with a conductive substance. Note 2: Films that contain excessive levels of anti-static additive can be conductive and need to be tested to verify that they do not cause a negative reading on the instrument. 1.4 Units— The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. Note 3: There is no known ISO equivalent to this standard. 1.5 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. 1.6 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 This test method provides precise dimensions necessary for the calculation of properties expressed in physical units. 5.2 This test method provides a means to characterize the variability of the material thickness in the transverse and machine directions for quality control purposes, production process support and analysis, incoming product inspection and for defining variability for buying/selling film. 5.3 This test method provides a method for instrument calibration utilizing traceable standards available from the National Institute of Standards and Technology (NIST). 5.4 It is not intended to replace other thickness measurements based on commercial portable tools, nor is it implied that thickness measurements made by different procedures will exactly agree.