GB/T 35173-2017 in English
VALIDCharacterisation and testing methods of recycled poly (ethylene terephthalate)(PET)
- Issued on:2017-12-29
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 35173-2017聚对苯二甲酸乙二醇酯(PET)塑料回收料的表征特性及检测方法》由TC415(全国产品回收利用基础与管理标准化技术委员会)归口,主管部门为国家标准化管理委员会。
Introduction
Foreword
This standard was drafted based on GB/T1.1-2009, proposed by the National Technical Committee for Standardization of Product Recycling and Management, and is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products. The main drafting units include Shandong Product Quality Inspection Institute, Qilu University of Technology, etc., which stipulates the characterization characteristics and detection methods of PET plastic recycled materials.
Comparison of standard frameworks for PET plastic recycled materials
| Dimensions | Basic characterization characteristics | Reference characterization characteristics | Test methods |
|---|---|---|---|
| Shape and size | Shape (flakes, pellets), maximum particle size, particle size distribution | Visual inspection, sieving density method, density analysis | GB/T 6005, GB/T 3682 |
| Physical properties | Color (single, transparent, multi-color), water content | Intrinsic viscosity (IV), melt mass flow rate (MFR) | GB/T 3682, GB/T 1632.5 |
| Chemical properties | PVC content, polyolefin content, alkalinity | Chroma (CIE L*a*b* space), filterability | ISO 11664-4, Appendix E |
Professional interpretation of PET recycled material testing methods
Determination of moisture content (Appendix B)
By gravimetric analysis, the sample is dried in a 150°C forced air oven for 4 hours and the mass loss is measured. This method is suitable for quickly determining the moisture content of PET recycled materials.
Determination of impurity content (Appendix C)
The heat treatment method is used to distinguish PVC and polyolefin impurities, and the residual impurity content is calculated by visual observation and weighing on a balance. This method is simple and efficient.
Background of standard formulation and analysis of technological evolution
The standard formulation of PET plastic recycled materials is based on the needs of circular economy and sustainable development, and aims to standardize the quality evaluation system of recycled materials. With the enhancement of environmental awareness and technological progress, the detection method has gradually developed from preliminary screening to precise quantification.
Implementation suggestions
- Establish a quality management system: Ensure the stability and consistency of recycled material production in accordance with ISO9001 standards.
- Negotiate the testing plan: The supply and demand parties should agree on the characterization characteristics in advance and determine the standard deviation range between the same batch and different batches.
- Record preservation: The supplier needs to keep complete records of raw material control, processing and product inspection for traceability.

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