1.1 该分类系统涵盖适用于注塑和挤出的增塑醋酸丁酸纤维素热塑性化合物的要求。这些化合物的丁酰基含量小于38 % 乙酰基含量小于15 % 并且可以包含染料和颜料。该分类系统不包括为特殊应用而复合的特殊材料。纤维素塑料材料是热塑性的，可重复加工和回收。该分类系统允许使用这些纤维素材料，前提是满足该分类系统的所有特定要求。 1.2 本分类系统中包含的财产是识别所涵盖成分所需的属性。通过使用第节中给出的后缀来指定识别对专业应用重要的特定特性所需的其他要求 5. . 1.3 该分类系统和随后的线路调用（规范）旨在提供一种调用最终产品或零件制造中使用的塑料材料的方法。 它不用于材料的选择。只有在仔细考虑了零件所需的设计和性能、零件所处的环境、所采用的制造工艺、所涉及的成本以及本分类系统所涵盖材料以外的材料的固有财产后，塑料领域的专业人士才能选择材料。 1.4 以国际单位制表示的数值应视为标准。 1.5 以下安全隐患警告仅适用于测试方法部分，第节 12 ，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）。本标准的使用者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。 注1: 目前还没有与该标准等效的ISO。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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 requirements for plasticized cellulose acetate butyrate thermoplastic compounds suitable for injection molding and extrusion. These compounds have a butyryl content less than 38 % and an acetyl content less than 15 % and can contain dyes and pigments. This classification system does not include special materials compounded for special applications. Cellulosic plastic materials, being thermoplastic, are reprocessable and recyclable. This classification system allows for the use of those cellulosic materials, provided that all specific requirements of this classification system are met. 1.2 The properties included in this classification system are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are specified by using the suffixes as given in Section 5 . 1.3 This classification system and subsequent line call out (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 performance required of the part, environment to which it will be exposed, fabrication process to be employed, costs involved, and inherent properties of the material other than those covered by this classification system. 1.4 The values stated in SI units are to be regarded as standard. 1.5 The following safety hazards caveat pertains only to the test method portion, Section 12 , 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. Note 1: There is no known ISO equivalent to this standard. 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.