本文件简要概述了塑料回收系统的现状（2019年）、相关的现有标准以及不同回收技术的简要说明。其目的是确定塑料回收系统中标准的必要性，并为采用区域标准和/或制定新的和现有标准提供指导。 本文件阐述了各种回收方案，重点是但不限于机械回收、化学品和/或原料回收以及相应的准备活动。 本文件不包括有机回收（也称为生物回收）和能源回收。

This document gives a brief overview of the current (2019) situation in plastic recycling systems, relevant existing standards and short description of different recycling techniques. It aims to identify the necessity of standards in the plastics recycling system and give direction for the adoption of regional standards and/or the development of new and existing standards. This document addresses various recycling options, with focus on, but not limited to, mechanical recycling, chemical and/or feedstock recycling and the corresponding preparatory activities. This document excludes organic recycling (also designated as biological recycling) and energy recovery.