1, degradable plastics are mainly divided into three types: photodegradable plastics, biodegradable plastics and photobiodegradable plastics.

2, the decomposition of photodegradable plastics requires sufficient light source, which has great limitations, according to the different raw materials, biodegradable plastics are divided into two categories: biodegradable biodegradable plastics and petrochemical biodegradable plastics.

3, biodegradable plastics are plastics produced by biomass, which can reduce the consumption of traditional energy sources, such as petroleum, including PLA (polylactic acid), PHA (polyhydroxyl chain alkanoate), PGA (polyglutamic acid) and so on.

4, PLA (polylactic acid) is fully biodegradable, plays an important role in the global white pollution control process, with the gradual implementation of the domestic plastic ban, China's PLA production capacity has accelerated.