Biodegradable materials include biodegradable natural polymer materials, such as carboxymethyl methyl cellulose, cassava starch, paper, etc. environmental protection degradable plastics also involve biodegradable plastics converted by microorganisms or obtained by analytical chemistry.

Biodegradable plastics refer to the degradation caused by the ubiquitous microbial effects of nature and transformed into carbon dioxide or / and methane gas and vapor gas under the conditions of nature, such as soil layers and / or stones, and / or different conditions, such as composting, anaerobic digestion or water-soluble cell culture medium Deashing sulfate of water and its elements and its new biomass natural materials.

Special attention should be paid to the fact that each biodegradable material includes paper, etc. the degradation of biodegradable plastics should be carried out as far as possible under the geographical and environmental conditions. If there are no degradation conditions, especially the daily living conditions of microorganisms, the degradation of degradable materials will be slow; In addition, not every biodegradable material can degrade rapidly under all geographical conditions. Therefore, for biodegradable materials, we should fully consider their geographical environment conditions and integrate the structural characteristics of the materials to realize analysis, so as to distinguish whether they are biodegradable materials or not. How to judge whether a material can be biodegraded, and a series of test methods and specifications have been implemented in China, which is a response to the regulatory problem.