1.1 该分类系统涵盖聚（甲基丙烯酸甲酯）模塑和挤出化合物。这些化合物是基于甲基丙烯酸甲酯的聚合物，其中至少70%的聚合物应由甲基丙烯酸甲酯聚合而成。 1.2 本标准中包括的性质是鉴定所涵盖的组合物所需的性质。识别对专门应用重要的特定特性所需的其他要求，应使用第节中给出的后缀进行规定 5 . 1.3 丙烯酸模制和挤出化合物经常用于极端透明度和在严重风化和其他环境暴露下保持透明度和颜色的能力是主要意义的应用中。虽然本文件的测试样本属性扩展到非原始材料的评估，但用户必须采取预防措施，以确保由这些材料制成的零件达到预期的目的-使用需求。因此，本说明书允许使用可再循环、重构和再研磨的那些丙烯酸塑料材料，只要满足以下条件: 1.3.1 满足本说明书中所述的要求，并且 1.3.2 满足特定最终用途应用的要求。 1.4 该分类系统和随后的生产线标注（规范）旨在提供一种标注用于制造最终产品或零件的塑料材料的方法。它不用于材料的选择。只有在仔细考虑零件的设计和所需性能、所暴露的环境、所采用的制造工艺、所涉及的成本以及除本标准所涵盖的材料之外的材料的固有特性后，具有塑料领域专业知识的人员才能选择材料。附注1: 该分类系统仅在标题上类似于ISO 24026-1。技术含量明显不同。 1.5 以SI单位表示的值将被视为标准值。 1.6 以下注意事项仅适用于本分类系统第11节的试验方法部分: 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。 1.7 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。

1.1 This classification system covers poly(methyl methacrylate) molding and extrusion compounds. These compounds are polymers based on methyl methacrylate, and at least 70 % of the polymer shall be polymerized from methyl methacrylate. 1.2 The properties included in this standard are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using suffixes as given in Section 5 . 1.3 Acrylic molding and extrusion compounds are used frequently in applications where extreme clarity and the ability to retain that clarity and color under severe weathering and other environmental exposures are of primary significance. While the test specimen properties of this document extend to the evaluation of nonvirgin materials, the user must take precautions to ensure that parts made from these materials meet the desired end-use requirements. Accordingly, this specification allows for the use of those acrylic plastic materials that can be recycled, reconstituted, and reground provided the following: 1.3.1 The requirements as stated in this specification are met, and 1.3.2 The requirements of the particular end-use application are met. 1.4 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be made by those having expertise in the plastics field only after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent properties of the material other than those covered by this standard. Note 1: This classification system is similar to ISO 24026–1 in title only. The technical content is significantly different. 1.5 The values stated in SI units are to be regarded as standard. 1.6 The following precautionary caveat pertains only to the test method portion, Section 11, of this classification system: 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. 1.7 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.