塑料 生物基塑料的碳和环境足迹 第 4 部分：环境（总）足迹（生命周期评估）

[中文适用范围]： 本文件提供了生命周期评估 (LCA) 要求和指南，以评估部分或全部基于生物基成分的生物基塑料产品、材料和聚合物树脂的生命周期影响。 LCA 的应用本身超出了本文件的范围。 不同应用的澄清、考虑、实践、简化和选项也超出了本文档的范围。 此外，本文件可以应用于不涵盖整个生命周期的研究，并有理由，例如企业对企业信息的情况，例如从摇篮到大门的研究、从大门到大门的研究，以及生命周期的特定部分（例如废物管理、产品组件）。 对于这些研究，本文件的大部分要求都适用（例如数据质量、收集和计算以及分配和严格审查），但并非系统边界的所有要求。 [外文原描述]： This document provides life cycle assessment (LCA) requirements and guidance to assess impacts over the life cycle of biobased plastic products, materials and polymer resins, which are partly or wholly based on biobased constituents. The applications of LCA as such are outside the scope of this document. Clarifications, considerations, practices, simplifications and options for the different applications, are also beyond the scope of this document. In addition, this document can be applied in studies that do not cover the whole life cycle, with justification, for example in the case of business-to-business information, such as cradle-to-gate studies, gate-to-gate studies, and specific parts of the life cycle (e.g. waste management, components of a product). For these studies, most requirements of this document are applicable (e.g. data quality, collection and calculation as well as allocation and critical review), but not all the requirements for the system boundary.