1.1 本指南是用于描述聚合物颗粒缺陷的术语汇编。不包括在现有来源中普遍理解或充分定义的术语。 1.2 并非每个术语都适用于每种类型的颗粒。例如，适用于透明颗粒的术语并不总是适用于半透明或不透明颗粒。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。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，并确定监管限制的适用性。 注1: 没有已知的ISO等效于本指南。 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 本指南旨在为聚合物颗粒的供应商和用户提供术语，以确保在讨论颗粒缺陷时相互理解。这不是一个绝对标准，但当聚合物材料的质量和/或描述出现问题时，应参考该标准。 4.2 该指南根据最适合该术语及其描述进行分类，以便于查找某些描述类型。 4.3 本指南中的某些术语不适用于所有树脂类型。用户有责任确定该术语及其后续定义是否适用于相关材料。 4.4 本文件中未包含的与聚合物相关的其他术语可在其他标准中找到，如术语 D883型 . 4.5 试验方法 D6290型 可用于在均匀、非荧光、近乎无色透明或近乎白色半透明或不透明塑料的日光照射下，用仪器测量塑料（包括颗粒）的变色以及黄度（或黄度变化）。

1.1 This guide is a compilation of terms used to describe defects of polymeric pellets. Terms that are generally understood or defined adequately in readily available sources are not included. 1.2 Not every term is applicable to every type of pellet. Terms which apply to transparent pellets, for example, do not always apply to translucent or opaque pellets. 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. Note 1: There is no known ISO equivalent to this guide. 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 ====== 4.1 This guide is intended to provide terminology for both suppliers and users of polymer pellets to ensure mutual understanding in discussions concerning pellet defects. It is not an absolute standard but is to be referred to when issues with the quality and/or description of the polymeric materials arise. 4.2 The guide is categorized according to the best fit for the term and its description for ease of finding certain description types. 4.3 Some terms within this guide do not apply to all resin types. It is the user’s responsibility to determine if the term and its subsequent definition are applicable to the material in question. 4.4 Other terminology relating to polymers that are not included in this document can be found in additional standards such as Terminology D883 . 4.5 Test Method D6290 can be used for the instrumental measurement of discoloration in plastics, including pellets, and of the degree of yellowness (or change of degree of yellowness) under daylight illumination of homogeneous, nonfluorescent, nearly colorless transparent or nearly-white translucent or opaque plastics.