1.1 该分类体系涵盖用于挤出、成型和其他制造方法的高度交联热塑性硫化橡胶（HCTPV）。高交联热塑性硫化橡胶（HCTPV）是由两个或多个聚合物系统组成的热塑性弹性体（TPE），其中至少一个是橡胶状的，高度（>95 %) 交联，其中至少一种是热塑性的，每个系统都有自己的相。热塑性相将趋于连续，而橡胶相则不连续。与具有较低交联度的相同热塑性/橡胶聚合物组合物相比，橡胶相的高交联度和超细颗粒尺寸（直径约1μm）使其性能更接近传统热固性橡胶( ≤ 95 %) 交联。HCTPV聚合物组合物可包含填料、增强剂、增塑剂、树脂、抗降解剂、着色剂和其他有益成分。 回收的HCTPV不包括在本分类体系中。 1.2 本标准中包含的特性是识别所涵盖成分所需的特性。通过使用第5节中给出的后缀来指定识别对专业应用重要的特定特征所需的其他要求。 1.3 该分类系统和随后的线形标注（规范）旨在提供一种方法，指出用于制造成品或零件的塑料材料。它不用于选择材料。只有在仔细考虑零件所需的设计和性能、零件将暴露的环境、所采用的制造工艺、所涉及的成本和材料的固有特性（本标准所涵盖的除外）后，才可以由在塑料领域具有专业知识的人员进行材料选择。 1.4 如中所示 IEEE/ASTM SI-10 ，以国际单位制为单位的数值应视为标准值。 注1: 没有已知的ISO等效于本标准。 1.5 本标准基于根据ASTM标准测试方法完成的测试。 1.6 以下安全危险警告仅适用于测试方法部分第节 11 ，属于该分类系统。 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。 1.7 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》中确立的国际公认标准化原则制定的。

1.1 This classification system covers highly crosslinked thermoplastic vulcanizates (HCTPV) for extrusion, molding and other fabrication methods. Highly crosslinked thermoplastic vulcanizates (HCTPV) are thermoplastic elastomers (TPE) consisting of two or more polymer systems at least one of which is rubbery and highly (>95 %) crosslinked and at least one of which is thermoplastic, with each system having its own phase. The thermoplastic phase will tend to be continuous and the rubbery phase discontinuous. The high level of crosslinking and ultrafine particle size (ca 1 μm diameter) of the rubbery phase give rise to properties more closely approaching those of conventional thermoset rubber, when compared to the same thermoplastic/rubbery polymer composition with a lower level ( ≤ 95 %) of crosslinking. The HCTPV polymer compositions may contain fillers, reinforcing agents, plasticizers, resins, antidegradants, colorants and other beneficial constituents. Recycled HCTPV are not covered in this classification system. 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 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 plastic 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. 1.4 As given in IEEE/ASTM SI-10 , values in SI units are to be regarded as standard. Note 1: There is no known ISO equivalent to this standard. 1.5 This standard is based on testing completed in accordance with ASTM standard test methods. 1.6 The following safety hazards caveat pertains only to the test methods 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.