Detail of GB/T 41638.2-2023

Introduction of GB/T 41638.2-2023

GB/T 41638.2-2023 Plastics - Carbon and environmental footprint of biobased plastics - Part 2:Material carbon footprint - Amount (mass) of CO2 removed from the air and incorporated into polymer molecule 1 Scope This document defines the material carbon footprint as the amount (mass) of CO2 removed from the air and incorporated into plastic, and specifies a determination method to quantify it. This document is applicable to plastic products, plastic materials and polymer resins that are partly or wholly based on biobased constituents. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 472 Plastics - Vocabulary ISO 16620-1 Plastics - Biobased content - Part 1: General principles ISO 16620-2:2019 Plastics - Biobased content - Part 2: Determination of biobased carbon content ISO 16620-3:2015 Plastics - Biobased content - Part 3: Determination of biobased synthetic polymer content ISO 16620-4 Plastics - Biobased content - Part 4: Determination of biobased mass content ISO 16620-5 Plastics - Biobased content - Part 5: Declaration of biobased carbon content, biobased synthetic polymer content and biobased mass content 3 Terms, definitions, symbols and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 472, ISO 16620-1, ISO 16620-2, ISO 16620-3, ISO 16620-4 and ISO 16620-5 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: ——ISO Online browsing platform: available at https://www.iso.org/obp ——IEC Electropedia: available at http://www.electropedia.org/ 3.2 Symbols mBSP——biobased synthetic polymer content, expressed as a percentage of the total mass mc ——fraction of carbon present in a product, in % MB——biobased carbon content on a mass base (kg) per 1 kg of polymer MCO2——amount (mass) of CO 2 removed from the air and incorporated into 1 kg of the polymer 3.3 Abbreviated terms TC total carbon TOC total organic carbon 4 Application Material carbon footprint shall not be used for a communication on overall environmental superiority because the material carbon footprint covers only a single impact category.

Contents of GB/T 41638.2-2023