GB/T 42764-2023 Active National standards

GB/T 42764-2023 Plastics—Assessment of the intrinsic biodegradability of materials exposed to marine inocula under mesophilic aerobic laboratory conditions—Test methods and requirements

Publish Date: 2023-05-23 Implement Date: 2023-12-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 42764-2023

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Basic standards and general methods for synthetic resins and plastics

ICS Name: Plastic Composite

Publish Date: 2023-05-23

Implement Date: 2023-12-01

Pages: 8 pages

Scope

This document describes a test method for evaluating the inherent biodegradability of plastic raw materials and polymers in the marine environment without any environmental exposure or pretreatment. The test method in this document is conducted under aerobic, moderate-temperature conditions, aiming to obtain the final biodegradability of the materials, i.e., their conversion into carbon dioxide, water, and biomass. This document is solely intended for evaluating the inherent biodegradability of materials and is not used to assess the environmental hazards of potential components, such as heavy metals, nor to evaluate their potential ecotoxicity. This document is suitable for assessing the overall environmental impact of plastic products intentionally or unintentionally discharged into the marine environment. This document is not used to evaluate the performance of products processed from biodegradable plastic raw materials and biodegradable polymers. The lifecycle and biodegradation rate of biodegradable plastic products in the marine environment are typically influenced by specific environmental conditions, as well as the thickness and shape of the products. The test results of the materials' biodegradability obtained under the test conditions specified in this document cannot be directly extrapolated to the actual marine environment. This document is not applicable to the "marine biodegradation" claims of biodegradable plastic raw materials. For such claims, please refer to relevant product standards. The test method specified in this document cannot be used to determine the specific biodegradation rate of the test materials (i.e., the decomposition rate per effective surface area). If necessary, please refer to relevant standards that specify biodegradation rates.