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GB/T 46019.1-2025: Plastics - Identification of recycled plastics - Part 1: Poly(ethylene terephthalate) (PET) materials
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GB/T 46019.1-2025: Plastics - Identification of recycled plastics - Part 1: Poly(ethylene terephthalate) (PET) materials

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT46019.1-2025
ICS 83.080.20;13.030.50 CCSG31 National Standard of the People's Republic of China Identification of recycled plastic components Part 1.Polyethylene terephthalate (PET) materials Released on August 1, 2025 Implementation on February 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 2 5 Model construction and evaluation 2 6 Identification of test samples 7 Appendix A (Informative) Identification Process of Virgin PET and Recycled PET 8 Appendix B (Informative) Typical Total Ion Chromatograms of Virgin PET and Recycled PET 11 Appendix C (Informative) Typical characteristic volatile components for identification of virgin PET and recycled PET 14 Appendix D (Informative) Random Forest Model Hyperparameter Combination Setting Examples 15 Appendix E (Informative) Examples of Identification of Virgin PET and Recycled PET 16 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is Part 1 of GB/T 46019 “Plastics – Identification of Recycled Plastics Content”. GB/T 46019 has been published in the following parts. --- Part 1.Polyethylene terephthalate (PET) material; --- Part 2.Polypropylene (PP) material. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Technical Committee on Plastics Standardization (SAC/TC15). This document was drafted by. Guangzhou Customs Technical Center, Sinopec (Beijing) Chemical Research Institute Co., Ltd., Zhili Technology (Guangdong) Co., Ltd. Zhongshan Quality Metrology Supervision and Inspection Institute, Guangdong Province, Zhejiang Haili Environmental Protection Technology Co., Ltd., Beijing Academy of Science and Technology Analysis Testing Institute (Beijing Physical and Chemical Analysis and Testing Center), Petrochemical Research Institute of China National Petroleum Corporation, Ningbo Customs Technology Center, Beijing Huasu Chenguang Technology Co., Ltd., Zhonglan Chenguang Chengdu Testing Technology Co., Ltd., Guangzhou Quality Supervision and Inspection Institute, Tonggui Technology Chengdu Co., Ltd., Jiangsu Saiweier New Materials Technology Co., Ltd., Fujian Sailong Technology Co., Ltd., Zhejiang Baolute Environmental Protection Technology Co., Ltd. Technology Engineering Co., Ltd., Chengdu Huantou Recycling Technology Co., Ltd., Jiangsu Peipu Polymer Technology Co., Ltd., Shanghai Kumho Sunny Plastics Co., Ltd. Company, Danone Asia Pacific (Shanghai) Management Co., Ltd., Shanghai Kangshi Food Technology Co., Ltd., Jinan University, Yunmeng County Debang Industrial Co., Ltd. Company, Fujian Fiber Inspection Center, Wuxi Yiwei Import and Export Co., Ltd., Shenzhen Customs Industrial Products Inspection Technology Center, Qingdao Customs Technology Center Xin, Yantai Zhenghai Hetai Technology Co., Ltd., Anhui Peak Technology Co., Ltd., Dynasty (Jiangsu) Environmental Protection Industry Holdings Co., Ltd., Zhejiang Jincai New Materials Co., Ltd., Shanghai Qianshi Technology Co., Ltd., Dongguan Wansucheng Plastic Co., Ltd., Hubei Botao Synthetic Fiber Co., Ltd. Company, Hangzhou Zhongwang Technology Co., Ltd. The main drafters of this document are. Zhong Huaining, Su Qizhi, Zhang Xiaorong, Yang Qinghua, Zhou Lei, Fu Ming, Gao Xia, Qu Jingbo, Luo Chuan, Yang Huahao, Li Dan, Chen Hongyuan, Xie Peng, He Guoshan, Zheng Huiqin, Zhang Shuo, Li Tianyuan, Ou Xiwen, Lin Lining, Wang Zhipeng, Qiu Weimei, Yang Jinghua, Fang Tingzi, Lin Qinbao, Zhang Dong, Zhu Feng, Sun Xiao, Ren Cong, Wang Lun, Wang Keqiang, Wang Tianyong, Shi Yingjie, Ye Yuanjian, He Lina, Zhou Dongji, Chen Minjian, Sun Xia, Mo Hongren, Lu Ning, Zhang Jinwen, Zhang Shitao, Zhu Ansheng, Luo Xiaoxia, Li Zhou, Liu Jie, and Wei Xiaoxiao.

introduction

Building a waste recycling system is a key step in my country's implementation of a comprehensive conservation strategy, safeguarding national resource security, and actively and steadily promoting carbon peak and carbon neutrality. The recycling and reuse of post-consumer plastics is an important part of waste recycling. This not only reduces resource waste and environmental pollution, but also effectively reduces carbon emissions, which is an important part of promoting the green and efficient development of the plastics industry. Polyethylene terephthalate (PET) is a widely used thermoplastic plastic and its post-consumer waste can be efficiently recycled. Utilization is of great significance to promoting resource recycling and high-quality development of the plastics industry. Plastic materials may introduce various impurities during use, disposal and recycling. However, unlike chemical recycling, mechanical recycling is difficult to Completely remove impurities from post-consumer plastics. Therefore, mechanically recycled PET (also known as PET (REC)) is similar to PET in terms of volatile component characteristics. There are certain differences in virgin PET. By analyzing the volatile components in PET materials, typical characteristic volatile components can be screened out. components, providing a basic basis for the identification of virgin PET and recycled PET. This document is based on the analysis of volatile components in virgin PET and recycled PET samples using headspace gas chromatography-mass spectrometry (HS-GC-MS). The typical volatile components were screened out by analyzing the volatile components, and the random forest classification model was combined to give the predicted value of the recycled PET probability, so as to achieve the Identification of whether the sample is post-consumer mechanically recycled PET. To ensure the scientificity and reliability of the detection method, this document combines the current relevant standards to clarify the sample preparation method, instrument reference conditions, The standardized process of software and data processing, as well as the specific steps of model construction and evaluation, aims to provide a systematic, repeatable and Traceable technical guidance helps to efficiently recycle plastic waste. GB/T 46019 "Plastics - Identification of Recycled Plastics Components" is intended to consist of three parts. --- Part 1.Polyethylene terephthalate (PET) materials. The purpose is to establish a method for identifying recycled PET materials. --- Part 2.Polypropylene (PP) materials. The purpose is to establish a method for identifying recycled PP materials. --- Part 3.Polyethylene (PE) materials. The purpose is to establish a method for identifying recycled PE materials. Identification of recycled plastic components Part 1.Polyethylene terephthalate (PET) materials

1 Scope

This document describes the determination of volatile components of polyethylene terephthalate (PET) materials using headspace gas chromatography-mass spectrometry. A method for distinguishing post-consumer mechanically recycled PET plastic materials from virgin PET plastic materials was developed using a random forest algorithm to construct a predictive model. This document applies to flake recycled PET plastics obtained by crushing, screening, sorting and washing post-consumer PET packaging bottles. Identification of recycled PET materials, or granular PET recycled plastic materials made from recycled PET bottle flakes through melt extrusion and granulation processes. This document is not applicable to the identification of recycled PET plastic materials obtained through chemical recycling. Note. Recycled PET plastic materials obtained through mechanical recycling of other types of post-consumer PET products are used for reference.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 2035 Plastics Terminology GB/T 30102 Guidelines for the recycling and reuse of plastic waste GB/T 40006.1 Plastics Recycled Plastics Part 1.General GB/T 41867 Information Technology - Artificial Intelligence Terminology GB/T 45090 Plastics - Marking and identification of recycled plastics

3 Terms and Definitions

The following terms and definitions are defined in GB/T 2035, GB/T 30102, GB/T 40006.1, GB/T 45090 and GB/T 41867. The definitions apply to this document. 3.1 post-consumer plastic Plastics generated by end users that have fulfilled their intended use or are no longer usable (including plastics returned from circulation). [Source. GB/T 30102-2024, 3.3, modified] 3.2 Chemical recycling In addition to energy recovery and incineration, the chemical structure of plastic waste can be changed through cracking, gasification or depolymerization to generate New monomers or raw materials. Note. This includes adding the recycled polymer directly to the original polymer polymerization reaction system to prepare the polymer containing recycled components through partial depolymerization and repolymerization process. new materials. [Source. GB/T 45090-2024, 3.4, modified] ...