1.1 本规程描述了用于检测两种不同聚合物实体的技术，例如: 1.1.1 表面或薄膜上的异常斑点或斑点，作为缺陷和 1.1.2 不同聚合物薄片的层通常用作共挤制成的阻挡膜。 1.2 该实践利用透过率光学和红外技术。 1.3 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.4 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。 第节给出了具体的危险说明 7. . 注1: 没有已知的ISO等效于本标准。 1.5 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====== 4.1 斑点最终会因其在薄膜中的外观或聚合物基材中的电气或机械性能下降而导致失效（见规范） D1248 ). 4.2 通过显微傅立叶变换红外光谱（FT-IR）分析用于屏障目的的复合层可以表明屏障胶带的充分性，或者表明屏障可能存在缺陷的原因（层中缺失层或孔，或者共挤实践不佳）。 图1 表示典型的多层膜。 图1 典型多层膜中材料的位置和功能

1.1 This practice describes the techniques used for detecting two different polymer entities such as: 1.1.1 Abnormal specks or spots on a surface or in the film that are objectionable as defects and 1.1.2 Layers of different polymeric sheets commonly used as barrier films made by coextrusion. 1.2 This practice utilizes through-transmittance optical and infrared techniques. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 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. Specific hazard statements are given in Section 7 . Note 1: There is no known ISO equivalent to this standard. 1.5 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 ====== 4.1 A speck will ultimately cause a failure to occur by virtue of its appearance in a film or by the decrease in electrical or mechanical properties in the polymer substrate (see Specification D1248 ). 4.2 The analysis of composite layers for barrier purposes by microscopic Fourier transform infrared spectroscopy (FT-IR) can indicate the adequacy of the barrier tape or indicate why a barrier may be defective (a missing layer or hole in the layer or poor coextrusion practice). Fig. 1 represents a typical multilayer film. FIG. 1 Position and Function of Materials in a Typical Multilayer Film